// SPDX-License-Identifier: Apache-2.0 // Copyright 2020 Western Digital Corporation or it's affiliates. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. //******************************************************************************** // el2_dec_tlu_ctl.sv // // // Function: CSRs, Commit/WB, flushing, exceptions, interrupts // Comments: // //******************************************************************************** module el2_dec_tlu_ctl import el2_pkg::*; #( `include "el2_param.vh" ) ( input logic clk, input logic free_clk, input logic free_l2clk, input logic rst_l, input logic scan_mode, input logic [31:1] rst_vec, // reset vector, from core pins input logic nmi_int, // nmi pin input logic [31:1] nmi_vec, // nmi vector input logic i_cpu_halt_req, // Asynchronous Halt request to CPU input logic i_cpu_run_req, // Asynchronous Restart request to CPU input logic lsu_fastint_stall_any, // needed by lsu for 2nd pass of dma with ecc correction, stall next cycle // perf counter inputs input logic ifu_pmu_instr_aligned, // aligned instructions input logic ifu_pmu_fetch_stall, // fetch unit stalled input logic ifu_pmu_ic_miss, // icache miss input logic ifu_pmu_ic_hit, // icache hit input logic ifu_pmu_bus_error, // Instruction side bus error input logic ifu_pmu_bus_busy, // Instruction side bus busy input logic ifu_pmu_bus_trxn, // Instruction side bus transaction input logic dec_pmu_instr_decoded, // decoded instructions input logic dec_pmu_decode_stall, // decode stall input logic dec_pmu_presync_stall, // decode stall due to presync'd inst input logic dec_pmu_postsync_stall, // decode stall due to postsync'd inst input logic lsu_store_stall_any, // SB or WB is full, stall decode input logic dma_dccm_stall_any, // DMA stall of lsu input logic dma_iccm_stall_any, // DMA stall of ifu input logic exu_pmu_i0_br_misp, // pipe 0 branch misp input logic exu_pmu_i0_br_ataken, // pipe 0 branch actual taken input logic exu_pmu_i0_pc4, // pipe 0 4 byte branch input logic lsu_pmu_bus_trxn, // D side bus transaction input logic lsu_pmu_bus_misaligned, // D side bus misaligned input logic lsu_pmu_bus_error, // D side bus error input logic lsu_pmu_bus_busy, // D side bus busy input logic lsu_pmu_load_external_m, // D side bus load input logic lsu_pmu_store_external_m, // D side bus store input logic dma_pmu_dccm_read, // DMA DCCM read input logic dma_pmu_dccm_write, // DMA DCCM write input logic dma_pmu_any_read, // DMA read input logic dma_pmu_any_write, // DMA write input logic [31:1] lsu_fir_addr, // Fast int address input logic [ 1:0] lsu_fir_error, // Fast int lookup error input logic iccm_dma_sb_error, // I side dma single bit error input el2_lsu_error_pkt_t lsu_error_pkt_r, // lsu precise exception/error packet input logic lsu_single_ecc_error_incr, // LSU inc SB error counter input logic dec_pause_state, // Pause counter not zero input logic lsu_imprecise_error_store_any, // store bus error input logic lsu_imprecise_error_load_any, // store bus error input logic [31:0] lsu_imprecise_error_addr_any, // store bus error address input logic dec_csr_wen_unq_d, // valid csr with write - for csr legal input logic dec_csr_any_unq_d, // valid csr - for csr legal input logic [11:0] dec_csr_rdaddr_d, // read address for csr input logic dec_csr_wen_r, // csr write enable at wb input logic [11:0] dec_csr_wraddr_r, // write address for csr input logic [31:0] dec_csr_wrdata_r, // csr write data at wb input logic dec_csr_stall_int_ff, // csr is mie/mstatus input logic dec_tlu_i0_valid_r, // pipe 0 op at e4 is valid input logic [31:1] exu_npc_r, // for NPC tracking input logic [31:1] dec_tlu_i0_pc_r, // for PC/NPC tracking input el2_trap_pkt_t dec_tlu_packet_r, // exceptions known at decode input logic [31:0] dec_illegal_inst, // For mtval input logic dec_i0_decode_d, // decode valid, used for clean icache diagnostics // branch info from pipe0 for errors or counter updates input logic [1:0] exu_i0_br_hist_r, // history input logic exu_i0_br_error_r, // error input logic exu_i0_br_start_error_r, // start error input logic exu_i0_br_valid_r, // valid input logic exu_i0_br_mp_r, // mispredict input logic exu_i0_br_middle_r, // middle of bank // branch info from pipe1 for errors or counter updates input logic exu_i0_br_way_r, // way hit or repl output logic dec_tlu_core_empty, // core is empty // Debug start output logic dec_dbg_cmd_done, // abstract command done output logic dec_dbg_cmd_fail, // abstract command failed output logic dec_tlu_dbg_halted, // Core is halted and ready for debug command output logic dec_tlu_debug_mode, // Core is in debug mode output logic dec_tlu_resume_ack, // Resume acknowledge output logic dec_tlu_debug_stall, // stall decode while waiting on core to empty output logic dec_tlu_flush_noredir_r, // Tell fetch to idle on this flush output logic dec_tlu_mpc_halted_only, // Core is halted only due to MPC output logic dec_tlu_flush_leak_one_r, // single step output logic dec_tlu_flush_err_r, // iside perr/ecc rfpc. This is the D stage of the error output logic dec_tlu_flush_extint, // fast ext int started output logic [31:2] dec_tlu_meihap, // meihap for fast int input logic dbg_halt_req, // DM requests a halt input logic dbg_resume_req, // DM requests a resume input logic ifu_miss_state_idle, // I-side miss buffer empty input logic lsu_idle_any, // lsu is idle input logic dec_div_active, // oop div is active output el2_trigger_pkt_t [3:0] trigger_pkt_any, // trigger info for trigger blocks input logic ifu_ic_error_start, // IC single bit error input logic ifu_iccm_rd_ecc_single_err, // ICCM single bit error input logic [70:0] ifu_ic_debug_rd_data, // diagnostic icache read data input logic ifu_ic_debug_rd_data_valid, // diagnostic icache read data valid output el2_cache_debug_pkt_t dec_tlu_ic_diag_pkt, // packet of DICAWICS, DICAD0/1, DICAGO info for icache diagnostics // Debug end input logic [7:0] pic_claimid, // pic claimid for csr input logic [3:0] pic_pl, // pic priv level for csr input logic mhwakeup, // high priority external int, wakeup if halted input logic mexintpend, // external interrupt pending input logic timer_int, // timer interrupt pending input logic soft_int, // software interrupt pending output logic o_cpu_halt_status, // PMU interface, halted output logic o_cpu_halt_ack, // halt req ack output logic o_cpu_run_ack, // run req ack output logic o_debug_mode_status, // Core to the PMU that core is in debug mode. When core is in debug mode, the PMU should refrain from sendng a halt or run request input logic [31:4] core_id, // Core ID // external MPC halt/run interface input logic mpc_debug_halt_req, // Async halt request input logic mpc_debug_run_req, // Async run request input logic mpc_reset_run_req, // Run/halt after reset output logic mpc_debug_halt_ack, // Halt ack output logic mpc_debug_run_ack, // Run ack output logic debug_brkpt_status, // debug breakpoint output logic [3:0] dec_tlu_meicurpl, // to PIC output logic [3:0] dec_tlu_meipt, // to PIC output logic [31:0] dec_csr_rddata_d, // csr read data at wb output logic dec_csr_legal_d, // csr indicates legal operation output el2_br_tlu_pkt_t dec_tlu_br0_r_pkt, // branch pkt to bp output logic dec_tlu_i0_kill_writeb_wb, // I0 is flushed, don't writeback any results to arch state output logic dec_tlu_flush_lower_wb, // commit has a flush (exception, int, mispredict at e4) output logic dec_tlu_i0_commit_cmt, // committed an instruction output logic dec_tlu_i0_kill_writeb_r, // I0 is flushed, don't writeback any results to arch state output logic dec_tlu_flush_lower_r, // commit has a flush (exception, int) output logic [31:1] dec_tlu_flush_path_r, // flush pc output logic dec_tlu_fence_i_r, // flush is a fence_i rfnpc, flush icache output logic dec_tlu_wr_pause_r, // CSR write to pause reg is at R. output logic dec_tlu_flush_pause_r, // Flush is due to pause output logic dec_tlu_presync_d, // CSR read needs to be presync'd output logic dec_tlu_postsync_d, // CSR needs to be presync'd output logic [31:0] dec_tlu_mrac_ff, // CSR for memory region control output logic dec_tlu_force_halt, // halt has been forced output logic dec_tlu_perfcnt0, // toggles when pipe0 perf counter 0 has an event inc output logic dec_tlu_perfcnt1, // toggles when pipe0 perf counter 1 has an event inc output logic dec_tlu_perfcnt2, // toggles when pipe0 perf counter 2 has an event inc output logic dec_tlu_perfcnt3, // toggles when pipe0 perf counter 3 has an event inc output logic dec_tlu_i0_exc_valid_wb1, // pipe 0 exception valid output logic dec_tlu_i0_valid_wb1, // pipe 0 valid output logic dec_tlu_int_valid_wb1, // pipe 2 int valid output logic [4:0] dec_tlu_exc_cause_wb1, // exception or int cause output logic [31:0] dec_tlu_mtval_wb1, // MTVAL value // feature disable from mfdc output logic dec_tlu_external_ldfwd_disable, // disable external load forwarding output logic dec_tlu_sideeffect_posted_disable, // disable posted stores to side-effect address output logic dec_tlu_core_ecc_disable, // disable core ECC output logic dec_tlu_bpred_disable, // disable branch prediction output logic dec_tlu_wb_coalescing_disable, // disable writebuffer coalescing output logic dec_tlu_pipelining_disable, // disable pipelining output logic dec_tlu_trace_disable, // disable trace output logic [2:0] dec_tlu_dma_qos_prty, // DMA QoS priority coming from MFDC [18:16] // clock gating overrides from mcgc output logic dec_tlu_misc_clk_override, // override misc clock domain gating output logic dec_tlu_dec_clk_override, // override decode clock domain gating output logic dec_tlu_ifu_clk_override, // override fetch clock domain gating output logic dec_tlu_lsu_clk_override, // override load/store clock domain gating output logic dec_tlu_bus_clk_override, // override bus clock domain gating output logic dec_tlu_pic_clk_override, // override PIC clock domain gating output logic dec_tlu_picio_clk_override, // override PICIO clock domain gating output logic dec_tlu_dccm_clk_override, // override DCCM clock domain gating output logic dec_tlu_icm_clk_override // override ICCM clock domain gating ); logic clk_override, e4e5_int_clk, nmi_fir_type, nmi_lsu_load_type, nmi_lsu_store_type, nmi_int_detected_f, nmi_lsu_load_type_f, nmi_lsu_store_type_f, allow_dbg_halt_csr_write, dbg_cmd_done_ns, i_cpu_run_req_d1_raw, debug_mode_status, lsu_single_ecc_error_r_d1, sel_npc_r, sel_npc_resume, ce_int, nmi_in_debug_mode, dpc_capture_npc, dpc_capture_pc, tdata_load, tdata_opcode, tdata_action, perfcnt_halted, tdata_chain, tdata_kill_write; logic reset_delayed, reset_detect, reset_detected; logic wr_mstatus_r, wr_mtvec_r, wr_mcyclel_r, wr_mcycleh_r, wr_minstretl_r, wr_minstreth_r, wr_mscratch_r, wr_mepc_r, wr_mcause_r, wr_mscause_r, wr_mtval_r, wr_mrac_r, wr_meihap_r, wr_meicurpl_r, wr_meipt_r, wr_dcsr_r, wr_dpc_r, wr_meicidpl_r, wr_meivt_r, wr_meicpct_r, wr_micect_r, wr_miccmect_r, wr_mfdht_r, wr_mfdhs_r, wr_mdccmect_r, wr_mhpme3_r, wr_mhpme4_r, wr_mhpme5_r, wr_mhpme6_r; logic wr_mpmc_r; logic [1:1] mpmc_b_ns, mpmc, mpmc_b; logic set_mie_pmu_fw_halt, fw_halted_ns, fw_halted; logic wr_mcountinhibit_r; logic [6:0] mcountinhibit; logic wr_mtsel_r, wr_mtdata1_t0_r, wr_mtdata1_t1_r, wr_mtdata1_t2_r, wr_mtdata1_t3_r, wr_mtdata2_t0_r, wr_mtdata2_t1_r, wr_mtdata2_t2_r, wr_mtdata2_t3_r; logic [31:0] mtdata2_t0, mtdata2_t1, mtdata2_t2, mtdata2_t3, mtdata2_tsel_out, mtdata1_tsel_out; logic [9:0] mtdata1_t0_ns, mtdata1_t0, mtdata1_t1_ns, mtdata1_t1, mtdata1_t2_ns, mtdata1_t2, mtdata1_t3_ns, mtdata1_t3; logic [9:0] tdata_wrdata_r; logic [1:0] mtsel_ns, mtsel; logic tlu_i0_kill_writeb_r; logic [1:0] mstatus_ns, mstatus; logic [1:0] mfdhs_ns, mfdhs; logic [31:0] force_halt_ctr, force_halt_ctr_f; logic force_halt; logic [5:0] mfdht, mfdht_ns; logic mstatus_mie_ns; logic [30:0] mtvec_ns, mtvec; logic [15:2] dcsr_ns, dcsr; logic [5:0] mip_ns, mip; logic [5:0] mie_ns, mie; logic [31:0] mcyclel_ns, mcyclel; logic [31:0] mcycleh_ns, mcycleh; logic [31:0] minstretl_ns, minstretl; logic [31:0] minstreth_ns, minstreth; logic [31:0] micect_ns, micect, miccmect_ns, miccmect, mdccmect_ns, mdccmect; logic [26:0] micect_inc, miccmect_inc, mdccmect_inc; logic [31:0] mscratch; logic [31:0] mhpmc3, mhpmc3_ns, mhpmc4, mhpmc4_ns, mhpmc5, mhpmc5_ns, mhpmc6, mhpmc6_ns; logic [31:0] mhpmc3h, mhpmc3h_ns, mhpmc4h, mhpmc4h_ns, mhpmc5h, mhpmc5h_ns, mhpmc6h, mhpmc6h_ns; logic [9:0] mhpme3, mhpme4, mhpme5, mhpme6; logic [ 31:0] mrac; logic [ 9:2] meihap; logic [31:10] meivt; logic [3:0] meicurpl_ns, meicurpl; logic [3:0] meicidpl_ns, meicidpl; logic [3:0] meipt_ns, meipt; logic [31:0] mdseac; logic mdseac_locked_ns, mdseac_locked_f, mdseac_en, nmi_lsu_detected; logic [31:1] mepc_ns, mepc; logic [31:1] dpc_ns, dpc; logic [31:0] mcause_ns, mcause; logic [3:0] mscause_ns, mscause, mscause_type; logic [31:0] mtval_ns, mtval; logic dec_pause_state_f, dec_tlu_wr_pause_r_d1, pause_expired_r, pause_expired_wb; logic tlu_flush_lower_r, tlu_flush_lower_r_d1; logic [31:1] tlu_flush_path_r, tlu_flush_path_r_d1; logic i0_valid_wb; logic tlu_i0_commit_cmt; logic [31:1] vectored_path, interrupt_path; logic [16:0] dicawics_ns, dicawics; logic wr_dicawics_r, wr_dicad0_r, wr_dicad1_r, wr_dicad0h_r; logic [31:0] dicad0_ns, dicad0, dicad0h_ns, dicad0h; logic [6:0] dicad1_ns, dicad1_raw; logic [31:0] dicad1; logic ebreak_r, ebreak_to_debug_mode_r, ecall_r, illegal_r, mret_r, inst_acc_r, fence_i_r, ic_perr_r, iccm_sbecc_r, ebreak_to_debug_mode_r_d1, kill_ebreak_count_r, inst_acc_second_r; logic ce_int_ready, ext_int_ready, timer_int_ready, soft_int_ready, int_timer0_int_ready, int_timer1_int_ready, mhwakeup_ready, take_ext_int, take_ce_int, take_timer_int, take_soft_int, take_int_timer0_int, take_int_timer1_int, take_nmi, take_nmi_r_d1, int_timer0_int_possible, int_timer1_int_possible; logic i0_exception_valid_r, interrupt_valid_r, i0_exception_valid_r_d1, interrupt_valid_r_d1, exc_or_int_valid_r, exc_or_int_valid_r_d1, mdccme_ce_req, miccme_ce_req, mice_ce_req; logic synchronous_flush_r; logic [4:0] exc_cause_r, exc_cause_wb; logic mcyclel_cout, mcyclel_cout_f, mcyclela_cout; logic [31:0] mcyclel_inc; logic [31:0] mcycleh_inc; logic minstretl_cout, minstretl_cout_f, minstret_enable, minstretl_cout_ns, minstretl_couta; logic [31:0] minstretl_inc, minstretl_read; logic [31:0] minstreth_inc, minstreth_read; logic [31:1] pc_r, pc_r_d1, npc_r, npc_r_d1; logic valid_csr; logic rfpc_i0_r; logic lsu_i0_rfnpc_r; logic dec_tlu_br0_error_r, dec_tlu_br0_start_error_r, dec_tlu_br0_v_r; logic lsu_i0_exc_r, lsu_i0_exc_r_raw, lsu_exc_ma_r, lsu_exc_acc_r, lsu_exc_st_r, lsu_exc_valid_r, lsu_exc_valid_r_raw, lsu_exc_valid_r_d1, lsu_i0_exc_r_d1, block_interrupts; logic i0_trigger_eval_r; logic request_debug_mode_r, request_debug_mode_r_d1, request_debug_mode_done, request_debug_mode_done_f; logic take_halt, halt_taken, halt_taken_f, internal_dbg_halt_mode, dbg_tlu_halted_f, take_reset, dbg_tlu_halted, core_empty, lsu_idle_any_f, ifu_miss_state_idle_f, resume_ack_ns, debug_halt_req_f, debug_resume_req_f_raw, debug_resume_req_f, enter_debug_halt_req, dcsr_single_step_done, dcsr_single_step_done_f, debug_halt_req_d1, debug_halt_req_ns, dcsr_single_step_running, dcsr_single_step_running_f, internal_dbg_halt_timers; logic [3:0] i0_trigger_r, trigger_action, trigger_enabled, i0_trigger_chain_masked_r; logic i0_trigger_hit_r, i0_trigger_hit_raw_r, i0_trigger_action_r, trigger_hit_r_d1, mepc_trigger_hit_sel_pc_r; logic [3:0] update_hit_bit_r, i0_iside_trigger_has_pri_r, i0trigger_qual_r, i0_lsu_trigger_has_pri_r; logic cpu_halt_status, cpu_halt_ack, cpu_run_ack, ext_halt_pulse, i_cpu_halt_req_d1, i_cpu_run_req_d1; logic inst_acc_r_raw, trigger_hit_dmode_r, trigger_hit_dmode_r_d1; logic [9:0] mcgc, mcgc_ns, mcgc_int; logic [18:0] mfdc; logic i_cpu_halt_req_sync_qual, i_cpu_run_req_sync_qual, pmu_fw_halt_req_ns, pmu_fw_halt_req_f, int_timer_stalled, fw_halt_req, enter_pmu_fw_halt_req, pmu_fw_tlu_halted, pmu_fw_tlu_halted_f, internal_pmu_fw_halt_mode, internal_pmu_fw_halt_mode_f, int_timer0_int_hold, int_timer1_int_hold, int_timer0_int_hold_f, int_timer1_int_hold_f; logic nmi_int_delayed, nmi_int_detected; logic [3:0] trigger_execute, trigger_data, trigger_store; logic dec_tlu_pmu_fw_halted; logic mpc_run_state_ns, debug_brkpt_status_ns, mpc_debug_halt_ack_ns, mpc_debug_run_ack_ns, dbg_halt_state_ns, dbg_run_state_ns, dbg_halt_state_f, mpc_debug_halt_req_sync_f, mpc_debug_run_req_sync_f, mpc_halt_state_f, mpc_halt_state_ns, mpc_run_state_f, debug_brkpt_status_f, mpc_debug_halt_ack_f, mpc_debug_run_ack_f, dbg_run_state_f, mpc_debug_halt_req_sync_pulse, mpc_debug_run_req_sync_pulse, debug_brkpt_valid, debug_halt_req, debug_resume_req, dec_tlu_mpc_halted_only_ns; logic take_ext_int_start, ext_int_freeze, take_ext_int_start_d1, take_ext_int_start_d2, take_ext_int_start_d3, ext_int_freeze_d1, csr_meicpct, ignore_ext_int_due_to_lsu_stall; logic mcause_sel_nmi_store, mcause_sel_nmi_load, mcause_sel_nmi_ext, fast_int_meicpct; logic [1:0] mcause_fir_error_type; logic dbg_halt_req_held_ns, dbg_halt_req_held, dbg_halt_req_final; logic iccm_repair_state_ns, iccm_repair_state_d1, iccm_repair_state_rfnpc; // internal timer, isolated for size reasons logic [31:0] dec_timer_rddata_d; logic dec_timer_read_d, dec_timer_t0_pulse, dec_timer_t1_pulse; logic csr_mitctl0; logic csr_mitctl1; logic csr_mitb0; logic csr_mitb1; logic csr_mitcnt0; logic csr_mitcnt1; logic nmi_int_sync, timer_int_sync, soft_int_sync, i_cpu_halt_req_sync, i_cpu_run_req_sync, mpc_debug_halt_req_sync, mpc_debug_run_req_sync, mpc_debug_halt_req_sync_raw; logic csr_wr_clk; logic e4e5_clk, e4_valid, e5_valid, e4e5_valid, internal_dbg_halt_mode_f, internal_dbg_halt_mode_f2; logic lsu_pmu_load_external_r, lsu_pmu_store_external_r; logic dec_tlu_flush_noredir_r_d1, dec_tlu_flush_pause_r_d1; logic lsu_single_ecc_error_r; logic [31:0] lsu_error_pkt_addr_r; logic mcyclel_cout_in; logic i0_valid_no_ebreak_ecall_r; logic minstret_enable_f; logic sel_exu_npc_r, sel_flush_npc_r, sel_hold_npc_r; logic pc0_valid_r; logic [15:0] mfdc_int, mfdc_ns; logic [ 31:0] mrac_in; logic [31:27] csr_sat; logic [ 8:6] dcsr_cause; logic enter_debug_halt_req_le, dcsr_cause_upgradeable; logic icache_rd_valid, icache_wr_valid, icache_rd_valid_f, icache_wr_valid_f; logic [3:0] mhpmc_inc_r, mhpmc_inc_r_d1; logic [3:0][9:0] mhpme_vec; logic mhpmc3_wr_en0, mhpmc3_wr_en1, mhpmc3_wr_en; logic mhpmc4_wr_en0, mhpmc4_wr_en1, mhpmc4_wr_en; logic mhpmc5_wr_en0, mhpmc5_wr_en1, mhpmc5_wr_en; logic mhpmc6_wr_en0, mhpmc6_wr_en1, mhpmc6_wr_en; logic mhpmc3h_wr_en0, mhpmc3h_wr_en; logic mhpmc4h_wr_en0, mhpmc4h_wr_en; logic mhpmc5h_wr_en0, mhpmc5h_wr_en; logic mhpmc6h_wr_en0, mhpmc6h_wr_en; logic [63:0] mhpmc3_incr, mhpmc4_incr, mhpmc5_incr, mhpmc6_incr; logic perfcnt_halted_d1, zero_event_r; logic [3:0] perfcnt_during_sleep; logic [9:0] event_r; el2_inst_pkt_t pmu_i0_itype_qual; logic csr_mfdht; logic csr_mfdhs; logic csr_misa; logic csr_mvendorid; logic csr_marchid; logic csr_mimpid; logic csr_mhartid; logic csr_mstatus; logic csr_mtvec; logic csr_mip; logic csr_mie; logic csr_mcyclel; logic csr_mcycleh; logic csr_minstretl; logic csr_minstreth; logic csr_mscratch; logic csr_mepc; logic csr_mcause; logic csr_mscause; logic csr_mtval; logic csr_mrac; logic csr_dmst; logic csr_mdseac; logic csr_meihap; logic csr_meivt; logic csr_meipt; logic csr_meicurpl; logic csr_meicidpl; logic csr_dcsr; logic csr_mcgc; logic csr_mfdc; logic csr_dpc; logic csr_mtsel; logic csr_mtdata1; logic csr_mtdata2; logic csr_mhpmc3; logic csr_mhpmc4; logic csr_mhpmc5; logic csr_mhpmc6; logic csr_mhpmc3h; logic csr_mhpmc4h; logic csr_mhpmc5h; logic csr_mhpmc6h; logic csr_mhpme3; logic csr_mhpme4; logic csr_mhpme5; logic csr_mhpme6; logic csr_mcountinhibit; logic csr_mpmc; logic csr_micect; logic csr_miccmect; logic csr_mdccmect; logic csr_dicawics; logic csr_dicad0h; logic csr_dicad0; logic csr_dicad1; logic csr_dicago; logic presync; logic postsync; logic legal; logic dec_csr_wen_r_mod; logic flush_clkvalid; logic sel_fir_addr; logic wr_mie_r; logic mtval_capture_pc_r; logic mtval_capture_pc_plus2_r; logic mtval_capture_inst_r; logic mtval_capture_lsu_r; logic mtval_clear_r; logic wr_mcgc_r; logic wr_mfdc_r; logic wr_mdeau_r; logic trigger_hit_for_dscr_cause_r_d1; logic conditionally_illegal; logic [3:0] ifu_mscause; logic ifu_ic_error_start_f, ifu_iccm_rd_ecc_single_err_f; el2_dec_timer_ctl #(.pt(pt)) int_timers (.*); // end of internal timers assign clk_override = dec_tlu_dec_clk_override; // Async inputs to the core have to be sync'd to the core clock. rvsyncss #(7) syncro_ff ( .*, .clk(free_clk), .din({ nmi_int, timer_int, soft_int, i_cpu_halt_req, i_cpu_run_req, mpc_debug_halt_req, mpc_debug_run_req }), .dout({ nmi_int_sync, timer_int_sync, soft_int_sync, i_cpu_halt_req_sync, i_cpu_run_req_sync, mpc_debug_halt_req_sync_raw, mpc_debug_run_req_sync }) ); // for CSRs that have inpipe writes only rvoclkhdr csrwr_r_cgc ( .en(dec_csr_wen_r_mod | clk_override), .l1clk(csr_wr_clk), .* ); assign e4_valid = dec_tlu_i0_valid_r; assign e4e5_valid = e4_valid | e5_valid; assign flush_clkvalid = internal_dbg_halt_mode_f | i_cpu_run_req_d1 | interrupt_valid_r | interrupt_valid_r_d1 | reset_delayed | pause_expired_r | pause_expired_wb | ic_perr_r | iccm_sbecc_r | clk_override; rvoclkhdr e4e5_cgc ( .en(e4e5_valid | clk_override), .l1clk(e4e5_clk), .* ); rvoclkhdr e4e5_int_cgc ( .en(e4e5_valid | flush_clkvalid), .l1clk(e4e5_int_clk), .* ); rvdffie #(11) freeff ( .*, .clk(free_l2clk), .din({ ifu_ic_error_start, ifu_iccm_rd_ecc_single_err, iccm_repair_state_ns, e4_valid, internal_dbg_halt_mode, lsu_pmu_load_external_m, lsu_pmu_store_external_m, tlu_flush_lower_r, tlu_i0_kill_writeb_r, internal_dbg_halt_mode_f, force_halt }), .dout({ ifu_ic_error_start_f, ifu_iccm_rd_ecc_single_err_f, iccm_repair_state_d1, e5_valid, internal_dbg_halt_mode_f, lsu_pmu_load_external_r, lsu_pmu_store_external_r, tlu_flush_lower_r_d1, dec_tlu_i0_kill_writeb_wb, internal_dbg_halt_mode_f2, dec_tlu_force_halt }) ); assign dec_tlu_i0_kill_writeb_r = tlu_i0_kill_writeb_r; assign nmi_int_detected = (nmi_int_sync & ~nmi_int_delayed) | nmi_lsu_detected | (nmi_int_detected_f & ~take_nmi_r_d1) | nmi_fir_type; // if the first nmi is a lsu type, note it. If there's already an nmi pending, ignore. Simultaneous with FIR, drop. assign nmi_lsu_load_type = (nmi_lsu_detected & lsu_imprecise_error_load_any & ~(nmi_int_detected_f & ~take_nmi_r_d1)) | (nmi_lsu_load_type_f & ~take_nmi_r_d1); assign nmi_lsu_store_type = (nmi_lsu_detected & lsu_imprecise_error_store_any & ~(nmi_int_detected_f & ~take_nmi_r_d1)) | (nmi_lsu_store_type_f & ~take_nmi_r_d1); assign nmi_fir_type = ~nmi_int_detected_f & take_ext_int_start_d3 & |lsu_fir_error[1:0]; // Filter subsequent bus errors after the first, until the lock on MDSEAC is cleared assign nmi_lsu_detected = ~mdseac_locked_f & (lsu_imprecise_error_load_any | lsu_imprecise_error_store_any) & ~nmi_fir_type; localparam MSTATUS_MIE = 0; localparam MIP_MCEIP = 5; localparam MIP_MITIP0 = 4; localparam MIP_MITIP1 = 3; localparam MIP_MEIP = 2; localparam MIP_MTIP = 1; localparam MIP_MSIP = 0; localparam MIE_MCEIE = 5; localparam MIE_MITIE0 = 4; localparam MIE_MITIE1 = 3; localparam MIE_MEIE = 2; localparam MIE_MTIE = 1; localparam MIE_MSIE = 0; localparam DCSR_EBREAKM = 15; localparam DCSR_STEPIE = 11; localparam DCSR_STOPC = 10; localparam DCSR_STEP = 2; assign reset_delayed = reset_detect ^ reset_detected; // ---------------------------------------------------------------------- // MPC halt // - can interact with debugger halt and v-v // fast ints in progress have priority assign mpc_debug_halt_req_sync = mpc_debug_halt_req_sync_raw & ~ext_int_freeze_d1; rvdffie #(16) mpvhalt_ff ( .*, .clk(free_l2clk), .din({ 1'b1, reset_detect, nmi_int_sync, nmi_int_detected, nmi_lsu_load_type, nmi_lsu_store_type, mpc_debug_halt_req_sync, mpc_debug_run_req_sync, mpc_halt_state_ns, mpc_run_state_ns, debug_brkpt_status_ns, mpc_debug_halt_ack_ns, mpc_debug_run_ack_ns, dbg_halt_state_ns, dbg_run_state_ns, dec_tlu_mpc_halted_only_ns }), .dout({ reset_detect, reset_detected, nmi_int_delayed, nmi_int_detected_f, nmi_lsu_load_type_f, nmi_lsu_store_type_f, mpc_debug_halt_req_sync_f, mpc_debug_run_req_sync_f, mpc_halt_state_f, mpc_run_state_f, debug_brkpt_status_f, mpc_debug_halt_ack_f, mpc_debug_run_ack_f, dbg_halt_state_f, dbg_run_state_f, dec_tlu_mpc_halted_only }) ); // turn level sensitive requests into pulses assign mpc_debug_halt_req_sync_pulse = mpc_debug_halt_req_sync & ~mpc_debug_halt_req_sync_f; assign mpc_debug_run_req_sync_pulse = mpc_debug_run_req_sync & ~mpc_debug_run_req_sync_f; // states assign mpc_halt_state_ns = (mpc_halt_state_f | mpc_debug_halt_req_sync_pulse | (reset_delayed & ~mpc_reset_run_req)) & ~mpc_debug_run_req_sync; assign mpc_run_state_ns = (mpc_run_state_f | (mpc_debug_run_req_sync_pulse & ~mpc_debug_run_ack_f)) & (internal_dbg_halt_mode_f & ~dcsr_single_step_running_f); // note, MPC halt can allow the jtag debugger to just start sending commands. When that happens, set the interal debugger halt state to prevent // MPC run from starting the core. assign dbg_halt_state_ns = (dbg_halt_state_f | (dbg_halt_req_final | dcsr_single_step_done_f | trigger_hit_dmode_r_d1 | ebreak_to_debug_mode_r_d1)) & ~dbg_resume_req; assign dbg_run_state_ns = (dbg_run_state_f | dbg_resume_req) & (internal_dbg_halt_mode_f & ~dcsr_single_step_running_f); // tell dbg we are only MPC halted assign dec_tlu_mpc_halted_only_ns = ~dbg_halt_state_f & mpc_halt_state_f; // this asserts from detection of bkpt until after we leave debug mode assign debug_brkpt_valid = ebreak_to_debug_mode_r_d1 | trigger_hit_dmode_r_d1; assign debug_brkpt_status_ns = (debug_brkpt_valid | debug_brkpt_status_f) & (internal_dbg_halt_mode & ~dcsr_single_step_running_f); // acks back to interface assign mpc_debug_halt_ack_ns = (mpc_halt_state_f & internal_dbg_halt_mode_f & mpc_debug_halt_req_sync & core_empty) | (mpc_debug_halt_ack_f & mpc_debug_halt_req_sync); assign mpc_debug_run_ack_ns = (mpc_debug_run_req_sync & ~internal_dbg_halt_mode & ~mpc_debug_halt_req_sync) | (mpc_debug_run_ack_f & mpc_debug_run_req_sync) ; // Pins assign mpc_debug_halt_ack = mpc_debug_halt_ack_f; assign mpc_debug_run_ack = mpc_debug_run_ack_f; assign debug_brkpt_status = debug_brkpt_status_f; // DBG halt req is a pulse, fast ext int in progress has priority assign dbg_halt_req_held_ns = (dbg_halt_req | dbg_halt_req_held) & ext_int_freeze_d1; assign dbg_halt_req_final = (dbg_halt_req | dbg_halt_req_held) & ~ext_int_freeze_d1; // combine MPC and DBG halt requests assign debug_halt_req = (dbg_halt_req_final | mpc_debug_halt_req_sync | (reset_delayed & ~mpc_reset_run_req)) & ~internal_dbg_halt_mode_f & ~ext_int_freeze_d1; assign debug_resume_req = ~debug_resume_req_f & // squash back to back resumes ((mpc_run_state_ns & ~dbg_halt_state_ns) | // MPC run req (dbg_run_state_ns & ~mpc_halt_state_ns)); // dbg request is a pulse // HALT // dbg/pmu/fw requests halt, service as soon as lsu is not blocking interrupts assign take_halt = (debug_halt_req_f | pmu_fw_halt_req_f) & ~synchronous_flush_r & ~mret_r & ~halt_taken_f & ~dec_tlu_flush_noredir_r_d1 & ~take_reset; // hold after we take a halt, so we don't keep taking halts assign halt_taken = (dec_tlu_flush_noredir_r_d1 & ~dec_tlu_flush_pause_r_d1 & ~take_ext_int_start_d1) | (halt_taken_f & ~dbg_tlu_halted_f & ~pmu_fw_tlu_halted_f & ~interrupt_valid_r_d1); // After doing halt flush (RFNPC) wait until core is idle before asserting a particular halt mode // It takes a cycle for mb_empty to assert after a fetch, take_halt covers that cycle assign core_empty = force_halt | (lsu_idle_any & lsu_idle_any_f & ifu_miss_state_idle & ifu_miss_state_idle_f & ~debug_halt_req & ~debug_halt_req_d1 & ~dec_div_active); assign dec_tlu_core_empty = core_empty; //-------------------------------------------------------------------------------- // Debug start // assign enter_debug_halt_req = (~internal_dbg_halt_mode_f & debug_halt_req) | dcsr_single_step_done_f | trigger_hit_dmode_r_d1 | ebreak_to_debug_mode_r_d1; // dbg halt state active from request until non-step resume assign internal_dbg_halt_mode = debug_halt_req_ns | (internal_dbg_halt_mode_f & ~(debug_resume_req_f & ~dcsr[DCSR_STEP])); // dbg halt can access csrs as long as we are not stepping assign allow_dbg_halt_csr_write = internal_dbg_halt_mode_f & ~dcsr_single_step_running_f; // hold debug_halt_req_ns high until we enter debug halt assign debug_halt_req_ns = enter_debug_halt_req | (debug_halt_req_f & ~dbg_tlu_halted); assign dbg_tlu_halted = (debug_halt_req_f & core_empty & halt_taken) | (dbg_tlu_halted_f & ~debug_resume_req_f); assign resume_ack_ns = (debug_resume_req_f & dbg_tlu_halted_f & dbg_run_state_ns); assign dcsr_single_step_done = dec_tlu_i0_valid_r & ~dec_tlu_dbg_halted & dcsr[DCSR_STEP] & ~rfpc_i0_r; assign dcsr_single_step_running = (debug_resume_req_f & dcsr[DCSR_STEP]) | (dcsr_single_step_running_f & ~dcsr_single_step_done_f); assign dbg_cmd_done_ns = dec_tlu_i0_valid_r & dec_tlu_dbg_halted; // used to hold off commits after an in-pipe debug mode request (triggers, DCSR) assign request_debug_mode_r = (trigger_hit_dmode_r | ebreak_to_debug_mode_r) | (request_debug_mode_r_d1 & ~dec_tlu_flush_lower_wb); assign request_debug_mode_done = (request_debug_mode_r_d1 | request_debug_mode_done_f) & ~dbg_tlu_halted_f; rvdffie #(18) halt_ff ( .*, .clk(free_l2clk), .din({ dec_tlu_flush_noredir_r, halt_taken, lsu_idle_any, ifu_miss_state_idle, dbg_tlu_halted, resume_ack_ns, debug_halt_req_ns, debug_resume_req, trigger_hit_dmode_r, dcsr_single_step_done, debug_halt_req, dec_tlu_wr_pause_r, dec_pause_state, request_debug_mode_r, request_debug_mode_done, dcsr_single_step_running, dec_tlu_flush_pause_r, dbg_halt_req_held_ns }), .dout({ dec_tlu_flush_noredir_r_d1, halt_taken_f, lsu_idle_any_f, ifu_miss_state_idle_f, dbg_tlu_halted_f, dec_tlu_resume_ack, debug_halt_req_f, debug_resume_req_f_raw, trigger_hit_dmode_r_d1, dcsr_single_step_done_f, debug_halt_req_d1, dec_tlu_wr_pause_r_d1, dec_pause_state_f, request_debug_mode_r_d1, request_debug_mode_done_f, dcsr_single_step_running_f, dec_tlu_flush_pause_r_d1, dbg_halt_req_held }) ); // MPC run collides with DBG halt, fix it here assign debug_resume_req_f = debug_resume_req_f_raw & ~dbg_halt_req; assign dec_tlu_debug_stall = debug_halt_req_f; assign dec_tlu_dbg_halted = dbg_tlu_halted_f; assign dec_tlu_debug_mode = internal_dbg_halt_mode_f; assign dec_tlu_pmu_fw_halted = pmu_fw_tlu_halted_f; // kill fetch redirection on flush if going to halt, or if there's a fence during db-halt assign dec_tlu_flush_noredir_r = take_halt | (fence_i_r & internal_dbg_halt_mode) | dec_tlu_flush_pause_r | (i0_trigger_hit_r & trigger_hit_dmode_r) | take_ext_int_start; assign dec_tlu_flush_extint = take_ext_int_start; // 1 cycle after writing the PAUSE counter, flush with noredir to idle F1-D. assign dec_tlu_flush_pause_r = dec_tlu_wr_pause_r_d1 & ~interrupt_valid_r & ~take_ext_int_start; // detect end of pause counter and rfpc assign pause_expired_r = ~dec_pause_state & dec_pause_state_f & ~(ext_int_ready | ce_int_ready | timer_int_ready | soft_int_ready | int_timer0_int_hold_f | int_timer1_int_hold_f | nmi_int_detected | ext_int_freeze_d1) & ~interrupt_valid_r_d1 & ~debug_halt_req_f & ~pmu_fw_halt_req_f & ~halt_taken_f; assign dec_tlu_flush_leak_one_r = dec_tlu_flush_lower_r & dcsr[DCSR_STEP] & (dec_tlu_resume_ack | dcsr_single_step_running) & ~dec_tlu_flush_noredir_r; assign dec_tlu_flush_err_r = dec_tlu_flush_lower_r & (ic_perr_r | iccm_sbecc_r); // If DM attempts to access an illegal CSR, send cmd_fail back assign dec_dbg_cmd_done = dbg_cmd_done_ns; assign dec_dbg_cmd_fail = illegal_r & dec_dbg_cmd_done; //-------------------------------------------------------------------------------- //-------------------------------------------------------------------------------- // Triggers // localparam MTDATA1_DMODE = 9; localparam MTDATA1_SEL = 7; localparam MTDATA1_ACTION = 6; localparam MTDATA1_CHAIN = 5; localparam MTDATA1_MATCH = 4; localparam MTDATA1_M_ENABLED = 3; localparam MTDATA1_EXE = 2; localparam MTDATA1_ST = 1; localparam MTDATA1_LD = 0; // Prioritize trigger hits with other exceptions. // // Trigger should have highest priority except: // - trigger is an execute-data and there is an inst_access exception (lsu triggers won't fire, inst. is nop'd by decode) // - trigger is a store-data and there is a lsu_acc_exc or lsu_ma_exc. assign trigger_execute[3:0] = { mtdata1_t3[MTDATA1_EXE], mtdata1_t2[MTDATA1_EXE], mtdata1_t1[MTDATA1_EXE], mtdata1_t0[MTDATA1_EXE] }; assign trigger_data[3:0] = { mtdata1_t3[MTDATA1_SEL], mtdata1_t2[MTDATA1_SEL], mtdata1_t1[MTDATA1_SEL], mtdata1_t0[MTDATA1_SEL] }; assign trigger_store[3:0] = { mtdata1_t3[MTDATA1_ST], mtdata1_t2[MTDATA1_ST], mtdata1_t1[MTDATA1_ST], mtdata1_t0[MTDATA1_ST] }; // MSTATUS[MIE] needs to be on to take triggers unless the action is trigger to debug mode. assign trigger_enabled[3:0] = { (mtdata1_t3[MTDATA1_ACTION] | mstatus[MSTATUS_MIE]) & mtdata1_t3[MTDATA1_M_ENABLED], (mtdata1_t2[MTDATA1_ACTION] | mstatus[MSTATUS_MIE]) & mtdata1_t2[MTDATA1_M_ENABLED], (mtdata1_t1[MTDATA1_ACTION] | mstatus[MSTATUS_MIE]) & mtdata1_t1[MTDATA1_M_ENABLED], (mtdata1_t0[MTDATA1_ACTION] | mstatus[MSTATUS_MIE]) & mtdata1_t0[MTDATA1_M_ENABLED] }; // iside exceptions are always in i0 assign i0_iside_trigger_has_pri_r[3:0] = ~( (trigger_execute[3:0] & trigger_data[3:0] & {4{inst_acc_r_raw}}) | // exe-data with inst_acc ({4{exu_i0_br_error_r | exu_i0_br_start_error_r}})); // branch error in i0 // lsu excs have to line up with their respective triggers since the lsu op can be i0 assign i0_lsu_trigger_has_pri_r[3:0] = ~(trigger_store[3:0] & trigger_data[3:0] & {4{lsu_i0_exc_r_raw}}); // trigger hits have to be eval'd to cancel side effect lsu ops even though the pipe is already frozen assign i0_trigger_eval_r = dec_tlu_i0_valid_r; assign i0trigger_qual_r[3:0] = {4{i0_trigger_eval_r}} & dec_tlu_packet_r.i0trigger[3:0] & i0_iside_trigger_has_pri_r[3:0] & i0_lsu_trigger_has_pri_r[3:0] & trigger_enabled[3:0]; // Qual trigger hits assign i0_trigger_r[3:0] = ~{4{dec_tlu_flush_lower_wb | dec_tlu_dbg_halted}} & i0trigger_qual_r[3:0]; // chaining can mask raw trigger info assign i0_trigger_chain_masked_r[3:0] = { i0_trigger_r[3] & (~mtdata1_t2[MTDATA1_CHAIN] | i0_trigger_r[2]), i0_trigger_r[2] & (~mtdata1_t2[MTDATA1_CHAIN] | i0_trigger_r[3]), i0_trigger_r[1] & (~mtdata1_t0[MTDATA1_CHAIN] | i0_trigger_r[0]), i0_trigger_r[0] & (~mtdata1_t0[MTDATA1_CHAIN] | i0_trigger_r[1]) }; // This is the highest priority by this point. assign i0_trigger_hit_raw_r = |i0_trigger_chain_masked_r[3:0]; assign i0_trigger_hit_r = i0_trigger_hit_raw_r; // Actions include breakpoint, or dmode. Dmode is only possible if the DMODE bit is set. // Otherwise, take a breakpoint. assign trigger_action[3:0] = { mtdata1_t3[MTDATA1_ACTION] & mtdata1_t3[MTDATA1_DMODE], mtdata1_t2[MTDATA1_ACTION] & mtdata1_t2[MTDATA1_DMODE] & ~mtdata1_t2[MTDATA1_CHAIN], mtdata1_t1[MTDATA1_ACTION] & mtdata1_t1[MTDATA1_DMODE], mtdata1_t0[MTDATA1_ACTION] & mtdata1_t0[MTDATA1_DMODE] & ~mtdata1_t0[MTDATA1_CHAIN] }; // this is needed to set the HIT bit in the triggers assign update_hit_bit_r[3:0] = ({4{|i0_trigger_r[3:0] & ~rfpc_i0_r}} & {i0_trigger_chain_masked_r[3], i0_trigger_r[2], i0_trigger_chain_masked_r[1], i0_trigger_r[0]}); // action, 1 means dmode. Simultaneous triggers with at least 1 set for dmode force entire action to dmode. assign i0_trigger_action_r = |(i0_trigger_chain_masked_r[3:0] & trigger_action[3:0]); assign trigger_hit_dmode_r = (i0_trigger_hit_r & i0_trigger_action_r); assign mepc_trigger_hit_sel_pc_r = i0_trigger_hit_r & ~trigger_hit_dmode_r; // // Debug end //-------------------------------------------------------------------------------- //---------------------------------------------------------------------- // // Commit // //---------------------------------------------------------------------- //-------------------------------------------------------------------------------- // External halt (not debug halt) // - Fully interlocked handshake // i_cpu_halt_req ____|--------------|_______________ // core_empty ---------------|___________ // o_cpu_halt_ack _________________|----|__________ // o_cpu_halt_status _______________|---------------------|_________ // i_cpu_run_req ______|----------|____ // o_cpu_run_ack ____________|------|________ // // debug mode has priority, ignore PMU/FW halt/run while in debug mode assign i_cpu_halt_req_sync_qual = i_cpu_halt_req_sync & ~dec_tlu_debug_mode & ~ext_int_freeze_d1; assign i_cpu_run_req_sync_qual = i_cpu_run_req_sync & ~dec_tlu_debug_mode & pmu_fw_tlu_halted_f & ~ext_int_freeze_d1; rvdffie #(10) exthaltff ( .*, .clk(free_l2clk), .din({ i_cpu_halt_req_sync_qual, i_cpu_run_req_sync_qual, cpu_halt_status, cpu_halt_ack, cpu_run_ack, internal_pmu_fw_halt_mode, pmu_fw_halt_req_ns, pmu_fw_tlu_halted, int_timer0_int_hold, int_timer1_int_hold }), .dout({ i_cpu_halt_req_d1, i_cpu_run_req_d1_raw, o_cpu_halt_status, o_cpu_halt_ack, o_cpu_run_ack, internal_pmu_fw_halt_mode_f, pmu_fw_halt_req_f, pmu_fw_tlu_halted_f, int_timer0_int_hold_f, int_timer1_int_hold_f }) ); // only happens if we aren't in dgb_halt assign ext_halt_pulse = i_cpu_halt_req_sync_qual & ~i_cpu_halt_req_d1; assign enter_pmu_fw_halt_req = ext_halt_pulse | fw_halt_req; assign pmu_fw_halt_req_ns = (enter_pmu_fw_halt_req | (pmu_fw_halt_req_f & ~pmu_fw_tlu_halted)) & ~debug_halt_req_f; assign internal_pmu_fw_halt_mode = pmu_fw_halt_req_ns | (internal_pmu_fw_halt_mode_f & ~i_cpu_run_req_d1 & ~debug_halt_req_f); // debug halt has priority assign pmu_fw_tlu_halted = ((pmu_fw_halt_req_f & core_empty & halt_taken & ~enter_debug_halt_req) | (pmu_fw_tlu_halted_f & ~i_cpu_run_req_d1)) & ~debug_halt_req_f; assign cpu_halt_ack = (i_cpu_halt_req_d1 & pmu_fw_tlu_halted_f) | (o_cpu_halt_ack & i_cpu_halt_req_sync); assign cpu_halt_status = (pmu_fw_tlu_halted_f & ~i_cpu_run_req_d1) | (o_cpu_halt_status & ~i_cpu_run_req_d1 & ~internal_dbg_halt_mode_f); assign cpu_run_ack = (~pmu_fw_tlu_halted_f & i_cpu_run_req_sync) | (o_cpu_halt_status & i_cpu_run_req_d1_raw) | (o_cpu_run_ack & i_cpu_run_req_sync); assign debug_mode_status = internal_dbg_halt_mode_f; assign o_debug_mode_status = debug_mode_status; // high priority interrupts can wakeup from external halt, so can unmasked timer interrupts assign i_cpu_run_req_d1 = i_cpu_run_req_d1_raw | ((nmi_int_detected | timer_int_ready | soft_int_ready | int_timer0_int_hold_f | int_timer1_int_hold_f | (mhwakeup & mhwakeup_ready)) & o_cpu_halt_status & ~i_cpu_halt_req_d1); //-------------------------------------------------------------------------------- //-------------------------------------------------------------------------------- assign lsu_single_ecc_error_r = lsu_single_ecc_error_incr; assign lsu_error_pkt_addr_r[31:0] = lsu_error_pkt_r.addr[31:0]; assign lsu_exc_valid_r_raw = lsu_error_pkt_r.exc_valid & ~dec_tlu_flush_lower_wb; assign lsu_i0_exc_r_raw = lsu_error_pkt_r.exc_valid; assign lsu_i0_exc_r = lsu_i0_exc_r_raw & lsu_exc_valid_r_raw & ~i0_trigger_hit_r & ~rfpc_i0_r; assign lsu_exc_valid_r = lsu_i0_exc_r; assign lsu_exc_ma_r = lsu_i0_exc_r & ~lsu_error_pkt_r.exc_type; assign lsu_exc_acc_r = lsu_i0_exc_r & lsu_error_pkt_r.exc_type; assign lsu_exc_st_r = lsu_i0_exc_r & lsu_error_pkt_r.inst_type; // Single bit ECC errors on loads are RFNPC corrected, with the corrected data written to the GPR. // LSU turns the load into a store and patches the data in the DCCM assign lsu_i0_rfnpc_r = dec_tlu_i0_valid_r & ~i0_trigger_hit_r & (~lsu_error_pkt_r.inst_type & lsu_error_pkt_r.single_ecc_error); // Final commit valids assign tlu_i0_commit_cmt = dec_tlu_i0_valid_r & ~rfpc_i0_r & ~lsu_i0_exc_r & ~inst_acc_r & ~dec_tlu_dbg_halted & ~request_debug_mode_r_d1 & ~i0_trigger_hit_r; // unified place to manage the killing of arch state writebacks assign tlu_i0_kill_writeb_r = rfpc_i0_r | lsu_i0_exc_r | inst_acc_r | (illegal_r & dec_tlu_dbg_halted) | i0_trigger_hit_r; assign dec_tlu_i0_commit_cmt = tlu_i0_commit_cmt; // refetch PC, microarch flush // ic errors only in pipe0 assign rfpc_i0_r = ((dec_tlu_i0_valid_r & ~tlu_flush_lower_r_d1 & (exu_i0_br_error_r | exu_i0_br_start_error_r)) | // inst commit with rfpc ((ic_perr_r | iccm_sbecc_r) & ~ext_int_freeze_d1)) & // ic/iccm without inst commit ~i0_trigger_hit_r & // unless there's a trigger. Err signal to ic/iccm will assert anyway to clear the error. ~lsu_i0_rfnpc_r; // From the indication of a iccm single bit error until the first commit or flush, maintain a repair state. In the repair state, rfnpc i0 commits. assign iccm_repair_state_ns = iccm_sbecc_r | (iccm_repair_state_d1 & ~dec_tlu_flush_lower_r); localparam MCPC = 12'h7c2; // this is a flush of last resort, meaning only assert it if there is no other flush happening. assign iccm_repair_state_rfnpc = tlu_i0_commit_cmt & iccm_repair_state_d1 & ~(ebreak_r | ecall_r | mret_r | take_reset | illegal_r | (dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MCPC))); if (pt.BTB_ENABLE == 1) begin // go ahead and repair the branch error on other flushes, doesn't have to be the rfpc flush assign dec_tlu_br0_error_r = exu_i0_br_error_r & dec_tlu_i0_valid_r & ~tlu_flush_lower_r_d1; assign dec_tlu_br0_start_error_r = exu_i0_br_start_error_r & dec_tlu_i0_valid_r & ~tlu_flush_lower_r_d1; assign dec_tlu_br0_v_r = exu_i0_br_valid_r & dec_tlu_i0_valid_r & ~tlu_flush_lower_r_d1 & (~exu_i0_br_mp_r | ~exu_pmu_i0_br_ataken); assign dec_tlu_br0_r_pkt.hist[1:0] = exu_i0_br_hist_r[1:0]; assign dec_tlu_br0_r_pkt.br_error = dec_tlu_br0_error_r; assign dec_tlu_br0_r_pkt.br_start_error = dec_tlu_br0_start_error_r; assign dec_tlu_br0_r_pkt.valid = dec_tlu_br0_v_r; assign dec_tlu_br0_r_pkt.way = exu_i0_br_way_r; assign dec_tlu_br0_r_pkt.middle = exu_i0_br_middle_r; end // if (pt.BTB_ENABLE==1) else begin assign dec_tlu_br0_error_r = '0; assign dec_tlu_br0_start_error_r = '0; assign dec_tlu_br0_v_r = '0; assign dec_tlu_br0_r_pkt = '0; end // else: !if(pt.BTB_ENABLE==1) // only expect these in pipe 0 assign ebreak_r = (dec_tlu_packet_r.pmu_i0_itype == EBREAK) & dec_tlu_i0_valid_r & ~i0_trigger_hit_r & ~dcsr[DCSR_EBREAKM] & ~rfpc_i0_r; assign ecall_r = (dec_tlu_packet_r.pmu_i0_itype == ECALL) & dec_tlu_i0_valid_r & ~i0_trigger_hit_r & ~rfpc_i0_r; assign illegal_r = ~dec_tlu_packet_r.legal & dec_tlu_i0_valid_r & ~i0_trigger_hit_r & ~rfpc_i0_r; assign mret_r = (dec_tlu_packet_r.pmu_i0_itype == MRET) & dec_tlu_i0_valid_r & ~i0_trigger_hit_r & ~rfpc_i0_r; // fence_i includes debug only fence_i's assign fence_i_r = (dec_tlu_packet_r.fence_i & dec_tlu_i0_valid_r & ~i0_trigger_hit_r) & ~rfpc_i0_r; assign ic_perr_r = ifu_ic_error_start_f & ~ext_int_freeze_d1 & (~internal_dbg_halt_mode_f | dcsr_single_step_running) & ~internal_pmu_fw_halt_mode_f; assign iccm_sbecc_r = ifu_iccm_rd_ecc_single_err_f & ~ext_int_freeze_d1 & (~internal_dbg_halt_mode_f | dcsr_single_step_running) & ~internal_pmu_fw_halt_mode_f; assign inst_acc_r_raw = dec_tlu_packet_r.icaf & dec_tlu_i0_valid_r; assign inst_acc_r = inst_acc_r_raw & ~rfpc_i0_r & ~i0_trigger_hit_r; assign inst_acc_second_r = dec_tlu_packet_r.icaf_second; assign ebreak_to_debug_mode_r = (dec_tlu_packet_r.pmu_i0_itype == EBREAK) & dec_tlu_i0_valid_r & ~i0_trigger_hit_r & dcsr[DCSR_EBREAKM] & ~rfpc_i0_r; rvdff #(1) exctype_wb_ff ( .*, .clk (e4e5_clk), .din (ebreak_to_debug_mode_r), .dout(ebreak_to_debug_mode_r_d1) ); assign dec_tlu_fence_i_r = fence_i_r; // // Exceptions // // - MEPC <- PC // - PC <- MTVEC, assert flush_lower // - MCAUSE <- cause // - MSCAUSE <- secondary cause // - MTVAL <- // - MPIE <- MIE // - MIE <- 0 // assign i0_exception_valid_r = (ebreak_r | ecall_r | illegal_r | inst_acc_r) & ~rfpc_i0_r & ~dec_tlu_dbg_halted; // Cause: // // 0x2 : illegal // 0x3 : breakpoint // 0xb : Environment call M-mode assign exc_cause_r[4:0] = ( ({5{take_ext_int}} & 5'h0b) | ({5{take_timer_int}} & 5'h07) | ({5{take_soft_int}} & 5'h03) | ({5{take_int_timer0_int}} & 5'h1d) | ({5{take_int_timer1_int}} & 5'h1c) | ({5{take_ce_int}} & 5'h1e) | ({5{illegal_r}} & 5'h02) | ({5{ecall_r}} & 5'h0b) | ({5{inst_acc_r}} & 5'h01) | ({5{ebreak_r | i0_trigger_hit_r}} & 5'h03) | ({5{lsu_exc_ma_r & ~lsu_exc_st_r}} & 5'h04) | ({5{lsu_exc_acc_r & ~lsu_exc_st_r}} & 5'h05) | ({5{lsu_exc_ma_r & lsu_exc_st_r}} & 5'h06) | ({5{lsu_exc_acc_r & lsu_exc_st_r}} & 5'h07) ) & ~{5{take_nmi}}; // // Interrupts // // exceptions that are committed have already happened and will cause an int at E4 to wait a cycle // or more if MSTATUS[MIE] is cleared. // // -in priority order, highest to lowest // -single cycle window where a csr write to MIE/MSTATUS is at E4 when the other conditions for externals are met. // Hold off externals for a cycle to make sure we are consistent with what was just written assign mhwakeup_ready = ~dec_csr_stall_int_ff & mstatus_mie_ns & mip[MIP_MEIP] & mie_ns[MIE_MEIE]; assign ext_int_ready = ~dec_csr_stall_int_ff & mstatus_mie_ns & mip[MIP_MEIP] & mie_ns[MIE_MEIE] & ~ignore_ext_int_due_to_lsu_stall; assign ce_int_ready = ~dec_csr_stall_int_ff & mstatus_mie_ns & mip[MIP_MCEIP] & mie_ns[MIE_MCEIE]; assign soft_int_ready = ~dec_csr_stall_int_ff & mstatus_mie_ns & mip[MIP_MSIP] & mie_ns[MIE_MSIE]; assign timer_int_ready = ~dec_csr_stall_int_ff & mstatus_mie_ns & mip[MIP_MTIP] & mie_ns[MIE_MTIE]; // MIP for internal timers pulses for 1 clock, resets the timer counter. Mip won't hold past the various stall conditions. assign int_timer0_int_possible = mstatus_mie_ns & mie_ns[MIE_MITIE0]; assign int_timer0_int_ready = mip[MIP_MITIP0] & int_timer0_int_possible; assign int_timer1_int_possible = mstatus_mie_ns & mie_ns[MIE_MITIE1]; assign int_timer1_int_ready = mip[MIP_MITIP1] & int_timer1_int_possible; // Internal timers pulse and reset. If core is PMU/FW halted, the pulse will cause an exit from halt, but won't stick around // Make it sticky, also for 1 cycle stall conditions. assign int_timer_stalled = dec_csr_stall_int_ff | synchronous_flush_r | exc_or_int_valid_r_d1 | mret_r; assign int_timer0_int_hold = (int_timer0_int_ready & (pmu_fw_tlu_halted_f | int_timer_stalled)) | (int_timer0_int_possible & int_timer0_int_hold_f & ~interrupt_valid_r & ~take_ext_int_start & ~internal_dbg_halt_mode_f); assign int_timer1_int_hold = (int_timer1_int_ready & (pmu_fw_tlu_halted_f | int_timer_stalled)) | (int_timer1_int_possible & int_timer1_int_hold_f & ~interrupt_valid_r & ~take_ext_int_start & ~internal_dbg_halt_mode_f); assign internal_dbg_halt_timers = internal_dbg_halt_mode_f & ~dcsr_single_step_running; assign block_interrupts = ( (internal_dbg_halt_mode & (~dcsr_single_step_running | dec_tlu_i0_valid_r)) | // No ints in db-halt unless we are single stepping internal_pmu_fw_halt_mode | i_cpu_halt_req_d1 | // No ints in PMU/FW halt. First we exit halt take_nmi | // NMI is top priority ebreak_to_debug_mode_r | // Heading to debug mode, hold off ints synchronous_flush_r | // exception flush this cycle exc_or_int_valid_r_d1 | // ext/int past cycle (need time for MIE to update) mret_r | // mret in progress, for cases were ISR enables ints before mret ext_int_freeze_d1 // Fast interrupt in progress (optional) ); if (pt.FAST_INTERRUPT_REDIRECT) begin assign take_ext_int_start = ext_int_ready & ~block_interrupts; assign ext_int_freeze = take_ext_int_start | take_ext_int_start_d1 | take_ext_int_start_d2 | take_ext_int_start_d3; assign take_ext_int = take_ext_int_start_d3 & ~|lsu_fir_error[1:0]; assign fast_int_meicpct = csr_meicpct & dec_csr_any_unq_d; // MEICPCT becomes illegal if fast ints are enabled assign ignore_ext_int_due_to_lsu_stall = lsu_fastint_stall_any; end else begin assign take_ext_int_start = 1'b0; assign ext_int_freeze = 1'b0; assign ext_int_freeze_d1 = 1'b0; assign take_ext_int_start_d1 = 1'b0; assign take_ext_int_start_d2 = 1'b0; assign take_ext_int_start_d3 = 1'b0; assign fast_int_meicpct = 1'b0; assign ignore_ext_int_due_to_lsu_stall = 1'b0; assign take_ext_int = ext_int_ready & ~block_interrupts; end assign take_ce_int = ce_int_ready & ~ext_int_ready & ~block_interrupts; assign take_soft_int = soft_int_ready & ~ext_int_ready & ~ce_int_ready & ~block_interrupts; assign take_timer_int = timer_int_ready & ~soft_int_ready & ~ext_int_ready & ~ce_int_ready & ~block_interrupts; assign take_int_timer0_int = (int_timer0_int_ready | int_timer0_int_hold_f) & int_timer0_int_possible & ~dec_csr_stall_int_ff & ~timer_int_ready & ~soft_int_ready & ~ext_int_ready & ~ce_int_ready & ~block_interrupts; assign take_int_timer1_int = (int_timer1_int_ready | int_timer1_int_hold_f) & int_timer1_int_possible & ~dec_csr_stall_int_ff & ~(int_timer0_int_ready | int_timer0_int_hold_f) & ~timer_int_ready & ~soft_int_ready & ~ext_int_ready & ~ce_int_ready & ~block_interrupts; assign take_reset = reset_delayed & mpc_reset_run_req; assign take_nmi = nmi_int_detected & ~internal_pmu_fw_halt_mode & (~internal_dbg_halt_mode | (dcsr_single_step_running_f & dcsr[DCSR_STEPIE] & ~dec_tlu_i0_valid_r & ~dcsr_single_step_done_f)) & ~synchronous_flush_r & ~mret_r & ~take_reset & ~ebreak_to_debug_mode_r & (~ext_int_freeze_d1 | (take_ext_int_start_d3 & |lsu_fir_error[1:0])); assign interrupt_valid_r = take_ext_int | take_timer_int | take_soft_int | take_nmi | take_ce_int | take_int_timer0_int | take_int_timer1_int; // Compute interrupt path: // If vectored async is set in mtvec, flush path for interrupts is MTVEC + (4 * CAUSE); assign vectored_path[31:1] = {mtvec[30:1], 1'b0} + {25'b0, exc_cause_r[4:0], 1'b0}; assign interrupt_path[31:1] = take_nmi ? nmi_vec[31:1] : ((mtvec[0] == 1'b1) ? vectored_path[31:1] : {mtvec[30:1], 1'b0}); assign sel_npc_r = lsu_i0_rfnpc_r | fence_i_r | iccm_repair_state_rfnpc | (i_cpu_run_req_d1 & ~interrupt_valid_r) | (rfpc_i0_r & ~dec_tlu_i0_valid_r); assign sel_npc_resume = (i_cpu_run_req_d1 & pmu_fw_tlu_halted_f) | pause_expired_r; assign sel_fir_addr = take_ext_int_start_d3 & ~|lsu_fir_error[1:0]; assign synchronous_flush_r = i0_exception_valid_r | // exception rfpc_i0_r | // rfpc lsu_exc_valid_r | // lsu exception in either pipe 0 or pipe 1 fence_i_r | // fence, a rfnpc lsu_i0_rfnpc_r | // lsu dccm sb ecc iccm_repair_state_rfnpc | // Iccm sb ecc debug_resume_req_f | // resume from debug halt, fetch the dpc sel_npc_resume | // resume from pmu/fw halt, or from pause and fetch the NPC dec_tlu_wr_pause_r_d1 | // flush at start of pause i0_trigger_hit_r; // trigger hit, ebreak or goto debug mode assign tlu_flush_lower_r = interrupt_valid_r | mret_r | synchronous_flush_r | take_halt | take_reset | take_ext_int_start; assign tlu_flush_path_r[31:1] = take_reset ? rst_vec[31:1] : ( ({31{sel_fir_addr}} & lsu_fir_addr[31:1]) | ({31{~take_nmi & sel_npc_r}} & npc_r[31:1]) | ({31{~take_nmi & rfpc_i0_r & dec_tlu_i0_valid_r & ~sel_npc_r}} & dec_tlu_i0_pc_r[31:1]) | ({31{interrupt_valid_r & ~sel_fir_addr}} & interrupt_path[31:1]) | ({31{(i0_exception_valid_r | lsu_exc_valid_r | (i0_trigger_hit_r & ~trigger_hit_dmode_r)) & ~interrupt_valid_r & ~sel_fir_addr}} & {mtvec[30:1],1'b0}) | ({31{~take_nmi & mret_r}} & mepc[31:1]) | ({31{~take_nmi & debug_resume_req_f}} & dpc[31:1]) | ({31{~take_nmi & sel_npc_resume}} & npc_r_d1[31:1]) ); rvdffpcie #(31) flush_lower_ff ( .*, .en (tlu_flush_lower_r), .din ({tlu_flush_path_r[31:1]}), .dout({tlu_flush_path_r_d1[31:1]}) ); assign dec_tlu_flush_lower_wb = tlu_flush_lower_r_d1; assign dec_tlu_flush_lower_r = tlu_flush_lower_r; assign dec_tlu_flush_path_r[31:1] = tlu_flush_path_r[31:1]; // this is used to capture mepc, etc. assign exc_or_int_valid_r = lsu_exc_valid_r | i0_exception_valid_r | interrupt_valid_r | (i0_trigger_hit_r & ~trigger_hit_dmode_r); rvdffie #(12) excinfo_wb_ff ( .*, .din({ interrupt_valid_r, i0_exception_valid_r, exc_or_int_valid_r, exc_cause_r[4:0], tlu_i0_commit_cmt & ~illegal_r, i0_trigger_hit_r, take_nmi, pause_expired_r }), .dout({ interrupt_valid_r_d1, i0_exception_valid_r_d1, exc_or_int_valid_r_d1, exc_cause_wb[4:0], i0_valid_wb, trigger_hit_r_d1, take_nmi_r_d1, pause_expired_wb }) ); //---------------------------------------------------------------------- // // CSRs // //---------------------------------------------------------------------- // ---------------------------------------------------------------------- // MISA (RO) // [31:30] XLEN - implementation width, 2'b01 - 32 bits // [12] M - integer mul/div // [8] I - RV32I // [2] C - Compressed extension localparam MISA = 12'h301; // MVENDORID, MARCHID, MIMPID, MHARTID localparam MVENDORID = 12'hf11; localparam MARCHID = 12'hf12; localparam MIMPID = 12'hf13; localparam MHARTID = 12'hf14; // ---------------------------------------------------------------------- // MSTATUS (RW) // [12:11] MPP : Prior priv level, always 2'b11, not flopped // [7] MPIE : Int enable previous [1] // [3] MIE : Int enable [0] localparam MSTATUS = 12'h300; //When executing a MRET instruction, supposing MPP holds the value 3, MIE //is set to MPIE; the privilege mode is changed to 3; MPIE is set to 1; and MPP is set to 3 assign dec_csr_wen_r_mod = dec_csr_wen_r & ~i0_trigger_hit_r & ~rfpc_i0_r; assign wr_mstatus_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MSTATUS); // set this even if we don't go to fwhalt due to debug halt. We committed the inst, so ... assign set_mie_pmu_fw_halt = ~mpmc_b_ns[1] & fw_halt_req; assign mstatus_ns[1:0] = ( ({2{~wr_mstatus_r & exc_or_int_valid_r}} & {mstatus[MSTATUS_MIE], 1'b0}) | ({2{ wr_mstatus_r & exc_or_int_valid_r}} & {dec_csr_wrdata_r[3], 1'b0}) | ({2{mret_r & ~exc_or_int_valid_r}} & {1'b1, mstatus[1]}) | ({2{set_mie_pmu_fw_halt}} & {mstatus[1], 1'b1}) | ({2{wr_mstatus_r & ~exc_or_int_valid_r}} & {dec_csr_wrdata_r[7], dec_csr_wrdata_r[3]}) | ({2{~wr_mstatus_r & ~exc_or_int_valid_r & ~mret_r & ~set_mie_pmu_fw_halt}} & mstatus[1:0]) ); // gate MIE if we are single stepping and DCSR[STEPIE] is off assign mstatus_mie_ns = mstatus[MSTATUS_MIE] & (~dcsr_single_step_running_f | dcsr[DCSR_STEPIE]); // ---------------------------------------------------------------------- // MTVEC (RW) // [31:2] BASE : Trap vector base address // [1] - Reserved, not implemented, reads zero // [0] MODE : 0 = Direct, 1 = Asyncs are vectored to BASE + (4 * CAUSE) localparam MTVEC = 12'h305; assign wr_mtvec_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MTVEC); assign mtvec_ns[30:0] = {dec_csr_wrdata_r[31:2], dec_csr_wrdata_r[0]}; rvdffe #(31) mtvec_ff ( .*, .en (wr_mtvec_r), .din (mtvec_ns[30:0]), .dout(mtvec[30:0]) ); // ---------------------------------------------------------------------- // MIP (RW) // // [30] MCEIP : (RO) M-Mode Correctable Error interrupt pending // [29] MITIP0 : (RO) M-Mode Internal Timer0 interrupt pending // [28] MITIP1 : (RO) M-Mode Internal Timer1 interrupt pending // [11] MEIP : (RO) M-Mode external interrupt pending // [7] MTIP : (RO) M-Mode timer interrupt pending // [3] MSIP : (RO) M-Mode software interrupt pending localparam MIP = 12'h344; assign ce_int = (mdccme_ce_req | miccme_ce_req | mice_ce_req); assign mip_ns[5:0] = { ce_int, dec_timer_t0_pulse, dec_timer_t1_pulse, mexintpend, timer_int_sync, soft_int_sync }; // ---------------------------------------------------------------------- // MIE (RW) // [30] MCEIE : (RO) M-Mode Correctable Error interrupt enable // [29] MITIE0 : (RO) M-Mode Internal Timer0 interrupt enable // [28] MITIE1 : (RO) M-Mode Internal Timer1 interrupt enable // [11] MEIE : (RW) M-Mode external interrupt enable // [7] MTIE : (RW) M-Mode timer interrupt enable // [3] MSIE : (RW) M-Mode software interrupt enable localparam MIE = 12'h304; assign wr_mie_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MIE); assign mie_ns[5:0] = wr_mie_r ? {dec_csr_wrdata_r[30:28], dec_csr_wrdata_r[11], dec_csr_wrdata_r[7], dec_csr_wrdata_r[3]} : mie[5:0]; rvdff #(6) mie_ff ( .*, .clk (csr_wr_clk), .din (mie_ns[5:0]), .dout(mie[5:0]) ); // ---------------------------------------------------------------------- // MCYCLEL (RW) // [31:0] : Lower Cycle count localparam MCYCLEL = 12'hb00; assign kill_ebreak_count_r = ebreak_to_debug_mode_r & dcsr[DCSR_STOPC]; assign wr_mcyclel_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MCYCLEL); assign mcyclel_cout_in = ~(kill_ebreak_count_r | (dec_tlu_dbg_halted & dcsr[DCSR_STOPC]) | dec_tlu_pmu_fw_halted | mcountinhibit[0]); // split for power assign {mcyclela_cout, mcyclel_inc[7:0]} = mcyclel[7:0] + {7'b0, 1'b1}; assign {mcyclel_cout, mcyclel_inc[31:8]} = mcyclel[31:8] + {23'b0, mcyclela_cout}; assign mcyclel_ns[31:0] = wr_mcyclel_r ? dec_csr_wrdata_r[31:0] : mcyclel_inc[31:0]; rvdffe #(24) mcyclel_bff ( .*, .clk (free_l2clk), .en (wr_mcyclel_r | (mcyclela_cout & mcyclel_cout_in)), .din (mcyclel_ns[31:8]), .dout(mcyclel[31:8]) ); rvdffe #(8) mcyclel_aff ( .*, .clk (free_l2clk), .en (wr_mcyclel_r | mcyclel_cout_in), .din (mcyclel_ns[7:0]), .dout(mcyclel[7:0]) ); // ---------------------------------------------------------------------- // MCYCLEH (RW) // [63:32] : Higher Cycle count // Chained with mcyclel. Note: mcyclel overflow due to a mcycleh write gets ignored. localparam MCYCLEH = 12'hb80; assign wr_mcycleh_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MCYCLEH); assign mcycleh_inc[31:0] = mcycleh[31:0] + {31'b0, mcyclel_cout_f}; assign mcycleh_ns[31:0] = wr_mcycleh_r ? dec_csr_wrdata_r[31:0] : mcycleh_inc[31:0]; rvdffe #(32) mcycleh_ff ( .*, .clk (free_l2clk), .en (wr_mcycleh_r | mcyclel_cout_f), .din (mcycleh_ns[31:0]), .dout(mcycleh[31:0]) ); // ---------------------------------------------------------------------- // MINSTRETL (RW) // [31:0] : Lower Instruction retired count // From the spec "Some CSRs, such as the instructions retired counter, instret, may be modified as side effects // of instruction execution. In these cases, if a CSR access instruction reads a CSR, it reads the // value prior to the execution of the instruction. If a CSR access instruction writes a CSR, the // update occurs after the execution of the instruction. In particular, a value written to instret by // one instruction will be the value read by the following instruction (i.e., the increment of instret // caused by the first instruction retiring happens before the write of the new value)." localparam MINSTRETL = 12'hb02; assign i0_valid_no_ebreak_ecall_r = dec_tlu_i0_valid_r & ~(ebreak_r | ecall_r | ebreak_to_debug_mode_r | illegal_r | mcountinhibit[2]); assign wr_minstretl_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MINSTRETL); assign {minstretl_couta, minstretl_inc[7:0]} = minstretl[7:0] + {7'b0, 1'b1}; assign {minstretl_cout, minstretl_inc[31:8]} = minstretl[31:8] + {23'b0, minstretl_couta}; assign minstret_enable = (i0_valid_no_ebreak_ecall_r & tlu_i0_commit_cmt) | wr_minstretl_r; assign minstretl_cout_ns = minstretl_cout & ~wr_minstreth_r & i0_valid_no_ebreak_ecall_r & ~dec_tlu_dbg_halted; assign minstretl_ns[31:0] = wr_minstretl_r ? dec_csr_wrdata_r[31:0] : minstretl_inc[31:0]; rvdffe #(24) minstretl_bff ( .*, .en (wr_minstretl_r | (minstretl_couta & minstret_enable)), .din (minstretl_ns[31:8]), .dout(minstretl[31:8]) ); rvdffe #(8) minstretl_aff ( .*, .en (minstret_enable), .din (minstretl_ns[7:0]), .dout(minstretl[7:0]) ); assign minstretl_read[31:0] = minstretl[31:0]; // ---------------------------------------------------------------------- // MINSTRETH (RW) // [63:32] : Higher Instret count // Chained with minstretl. Note: minstretl overflow due to a minstreth write gets ignored. localparam MINSTRETH = 12'hb82; assign wr_minstreth_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MINSTRETH); assign minstreth_inc[31:0] = minstreth[31:0] + {31'b0, minstretl_cout_f}; assign minstreth_ns[31:0] = wr_minstreth_r ? dec_csr_wrdata_r[31:0] : minstreth_inc[31:0]; rvdffe #(32) minstreth_ff ( .*, .en ((minstret_enable_f & minstretl_cout_f) | wr_minstreth_r), .din (minstreth_ns[31:0]), .dout(minstreth[31:0]) ); assign minstreth_read[31:0] = minstreth_inc[31:0]; // ---------------------------------------------------------------------- // MSCRATCH (RW) // [31:0] : Scratch register localparam MSCRATCH = 12'h340; assign wr_mscratch_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MSCRATCH); rvdffe #(32) mscratch_ff ( .*, .en (wr_mscratch_r), .din (dec_csr_wrdata_r[31:0]), .dout(mscratch[31:0]) ); // ---------------------------------------------------------------------- // MEPC (RW) // [31:1] : Exception PC localparam MEPC = 12'h341; // NPC assign sel_exu_npc_r = ~dec_tlu_dbg_halted & ~tlu_flush_lower_r_d1 & dec_tlu_i0_valid_r; assign sel_flush_npc_r = ~dec_tlu_dbg_halted & tlu_flush_lower_r_d1 & ~dec_tlu_flush_noredir_r_d1; assign sel_hold_npc_r = ~sel_exu_npc_r & ~sel_flush_npc_r; assign npc_r[31:1] = ( ({31{sel_exu_npc_r}} & exu_npc_r[31:1]) | ({31{~mpc_reset_run_req & reset_delayed}} & rst_vec[31:1]) | // init to reset vector for mpc halt on reset case ({31{(sel_flush_npc_r)}} & tlu_flush_path_r_d1[31:1]) | ({31{(sel_hold_npc_r)}} & npc_r_d1[31:1]) ); rvdffpcie #(31) npwbc_ff ( .*, .en (sel_exu_npc_r | sel_flush_npc_r | reset_delayed), .din (npc_r[31:1]), .dout(npc_r_d1[31:1]) ); // PC has to be captured for exceptions and interrupts. For MRET, we could execute it and then take an // interrupt before the next instruction. assign pc0_valid_r = ~dec_tlu_dbg_halted & dec_tlu_i0_valid_r; assign pc_r[31:1] = ( ({31{ pc0_valid_r}} & dec_tlu_i0_pc_r[31:1]) | ({31{~pc0_valid_r}} & pc_r_d1[31:1])); rvdffpcie #(31) pwbc_ff ( .*, .en (pc0_valid_r), .din (pc_r[31:1]), .dout(pc_r_d1[31:1]) ); assign wr_mepc_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MEPC); assign mepc_ns[31:1] = ( ({31{i0_exception_valid_r | lsu_exc_valid_r | mepc_trigger_hit_sel_pc_r}} & pc_r[31:1]) | ({31{interrupt_valid_r}} & npc_r[31:1]) | ({31{wr_mepc_r & ~exc_or_int_valid_r}} & dec_csr_wrdata_r[31:1]) | ({31{~wr_mepc_r & ~exc_or_int_valid_r}} & mepc[31:1]) ); rvdffe #(31) mepc_ff ( .*, .en(i0_exception_valid_r | lsu_exc_valid_r | mepc_trigger_hit_sel_pc_r | interrupt_valid_r | wr_mepc_r), .din(mepc_ns[31:1]), .dout(mepc[31:1]) ); // ---------------------------------------------------------------------- // MCAUSE (RW) // [31:0] : Exception Cause localparam MCAUSE = 12'h342; assign wr_mcause_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MCAUSE); assign mcause_sel_nmi_store = exc_or_int_valid_r & take_nmi & nmi_lsu_store_type; assign mcause_sel_nmi_load = exc_or_int_valid_r & take_nmi & nmi_lsu_load_type; assign mcause_sel_nmi_ext = exc_or_int_valid_r & take_nmi & take_ext_int_start_d3 & |lsu_fir_error[1:0] & ~nmi_int_detected_f; // FIR value decoder // 0 –no error // 1 –uncorrectable ecc => f000_1000 // 2 –dccm region access error => f000_1001 // 3 –non dccm region access error => f000_1002 assign mcause_fir_error_type[1:0] = {&lsu_fir_error[1:0], lsu_fir_error[1] & ~lsu_fir_error[0]}; assign mcause_ns[31:0] = ( ({32{mcause_sel_nmi_store}} & {32'hf000_0000}) | ({32{mcause_sel_nmi_load}} & {32'hf000_0001}) | ({32{mcause_sel_nmi_ext}} & {28'hf000_100, 2'b0, mcause_fir_error_type[1:0]}) | ({32{exc_or_int_valid_r & ~take_nmi}} & {interrupt_valid_r, 26'b0, exc_cause_r[4:0]}) | ({32{wr_mcause_r & ~exc_or_int_valid_r}} & dec_csr_wrdata_r[31:0]) | ({32{~wr_mcause_r & ~exc_or_int_valid_r}} & mcause[31:0]) ); rvdffe #(32) mcause_ff ( .*, .en (exc_or_int_valid_r | wr_mcause_r), .din (mcause_ns[31:0]), .dout(mcause[31:0]) ); // ---------------------------------------------------------------------- // MSCAUSE (RW) // [2:0] : Secondary exception Cause localparam MSCAUSE = 12'h7ff; assign wr_mscause_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MSCAUSE); assign ifu_mscause[3:0] = (dec_tlu_packet_r.icaf_type[1:0] == 2'b00) ? 4'b1001 : {2'b00 , dec_tlu_packet_r.icaf_type[1:0]} ; assign mscause_type[3:0] = ( ({4{lsu_i0_exc_r}} & lsu_error_pkt_r.mscause[3:0]) | ({4{i0_trigger_hit_r}} & 4'b0001) | ({4{ebreak_r}} & 4'b0010) | ({4{inst_acc_r}} & ifu_mscause[3:0]) ); assign mscause_ns[3:0] = ( ({4{exc_or_int_valid_r}} & mscause_type[3:0]) | ({4{ wr_mscause_r & ~exc_or_int_valid_r}} & dec_csr_wrdata_r[3:0]) | ({4{~wr_mscause_r & ~exc_or_int_valid_r}} & mscause[3:0]) ); rvdff #(4) mscause_ff ( .*, .clk (e4e5_int_clk), .din (mscause_ns[3:0]), .dout(mscause[3:0]) ); // ---------------------------------------------------------------------- // MTVAL (RW) // [31:0] : Exception address if relevant localparam MTVAL = 12'h343; assign wr_mtval_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MTVAL); assign mtval_capture_pc_r = exc_or_int_valid_r & (ebreak_r | (inst_acc_r & ~inst_acc_second_r) | mepc_trigger_hit_sel_pc_r) & ~take_nmi; assign mtval_capture_pc_plus2_r = exc_or_int_valid_r & (inst_acc_r & inst_acc_second_r) & ~take_nmi; assign mtval_capture_inst_r = exc_or_int_valid_r & illegal_r & ~take_nmi; assign mtval_capture_lsu_r = exc_or_int_valid_r & lsu_exc_valid_r & ~take_nmi; assign mtval_clear_r = exc_or_int_valid_r & ~mtval_capture_pc_r & ~mtval_capture_inst_r & ~mtval_capture_lsu_r & ~mepc_trigger_hit_sel_pc_r; assign mtval_ns[31:0] = (({32{mtval_capture_pc_r}} & {pc_r[31:1], 1'b0}) | ({32{mtval_capture_pc_plus2_r}} & {pc_r[31:1] + 31'b1, 1'b0}) | ({32{mtval_capture_inst_r}} & dec_illegal_inst[31:0]) | ({32{mtval_capture_lsu_r}} & lsu_error_pkt_addr_r[31:0]) | ({32{wr_mtval_r & ~interrupt_valid_r}} & dec_csr_wrdata_r[31:0]) | ({32{~take_nmi & ~wr_mtval_r & ~mtval_capture_pc_r & ~mtval_capture_inst_r & ~mtval_clear_r & ~mtval_capture_lsu_r}} & mtval[31:0]) ); rvdffe #(32) mtval_ff ( .*, .en (tlu_flush_lower_r | wr_mtval_r), .din (mtval_ns[31:0]), .dout(mtval[31:0]) ); // ---------------------------------------------------------------------- // MCGC (RW) Clock gating control // [31:10]: Reserved, reads 0x0 // [9] : picio_clk_override // [7] : dec_clk_override // [6] : Unused // [5] : ifu_clk_override // [4] : lsu_clk_override // [3] : bus_clk_override // [2] : pic_clk_override // [1] : dccm_clk_override // [0] : icm_clk_override // localparam MCGC = 12'h7f8; assign wr_mcgc_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MCGC); assign mcgc_ns[9:0] = wr_mcgc_r ? {~dec_csr_wrdata_r[9], dec_csr_wrdata_r[8:0]} : mcgc_int[9:0]; rvdffe #(10) mcgc_ff ( .*, .en (wr_mcgc_r), .din (mcgc_ns[9:0]), .dout(mcgc_int[9:0]) ); assign mcgc[9:0] = {~mcgc_int[9], mcgc_int[8:0]}; assign dec_tlu_picio_clk_override = mcgc[9]; assign dec_tlu_misc_clk_override = mcgc[8]; assign dec_tlu_dec_clk_override = mcgc[7]; //sign dec_tlu_exu_clk_override = mcgc[6]; assign dec_tlu_ifu_clk_override = mcgc[5]; assign dec_tlu_lsu_clk_override = mcgc[4]; assign dec_tlu_bus_clk_override = mcgc[3]; assign dec_tlu_pic_clk_override = mcgc[2]; assign dec_tlu_dccm_clk_override = mcgc[1]; assign dec_tlu_icm_clk_override = mcgc[0]; // ---------------------------------------------------------------------- // MFDC (RW) Feature Disable Control // [31:19] : Reserved, reads 0x0 // [18:16] : DMA QoS Prty // [15:13] : Reserved, reads 0x0 // [12] : Disable trace // [11] : Disable external load forwarding // [10] : Disable dual issue // [9] : Disable pic multiple ints // [8] : Disable core ecc // [7] : Disable secondary alu?s // [6] : Unused, 0x0 // [5] : Disable non-blocking loads/divides // [4] : Disable fast divide // [3] : Disable branch prediction and return stack // [2] : Disable write buffer coalescing // [1] : Disable load misses that bypass the write buffer // [0] : Disable pipelining - Enable single instruction execution // localparam MFDC = 12'h7f9; assign wr_mfdc_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MFDC); rvdffe #(16) mfdc_ff ( .*, .en (wr_mfdc_r), .din ({mfdc_ns[15:0]}), .dout(mfdc_int[15:0]) ); // flip poweron value of bit 6 for AXI build // flip poweron valid of bit 12 assign mfdc_ns[15:0] = { ~dec_csr_wrdata_r[18:16], dec_csr_wrdata_r[12], dec_csr_wrdata_r[11:7], ~dec_csr_wrdata_r[6], dec_csr_wrdata_r[5:0] }; assign mfdc[18:0] = { ~mfdc_int[15:13], 3'b0, mfdc_int[12], mfdc_int[11:7], ~mfdc_int[6], mfdc_int[5:0] }; assign dec_tlu_dma_qos_prty[2:0] = mfdc[18:16]; assign dec_tlu_trace_disable = mfdc[12]; assign dec_tlu_external_ldfwd_disable = mfdc[11]; assign dec_tlu_core_ecc_disable = mfdc[8]; assign dec_tlu_sideeffect_posted_disable = mfdc[6]; assign dec_tlu_bpred_disable = mfdc[3]; assign dec_tlu_wb_coalescing_disable = mfdc[2]; assign dec_tlu_pipelining_disable = mfdc[0]; // ---------------------------------------------------------------------- // MCPC (RW) Pause counter // [31:0] : Reads 0x0, decs in the wb register in decode_ctl assign dec_tlu_wr_pause_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MCPC) & ~interrupt_valid_r & ~take_ext_int_start; // ---------------------------------------------------------------------- // MRAC (RW) // [31:0] : Region Access Control Register, 16 regions, {side_effect, cachable} pairs localparam MRAC = 12'h7c0; assign wr_mrac_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MRAC); // prevent pairs of 0x11, side_effect and cacheable assign mrac_in[31:0] = { dec_csr_wrdata_r[31], dec_csr_wrdata_r[30] & ~dec_csr_wrdata_r[31], dec_csr_wrdata_r[29], dec_csr_wrdata_r[28] & ~dec_csr_wrdata_r[29], dec_csr_wrdata_r[27], dec_csr_wrdata_r[26] & ~dec_csr_wrdata_r[27], dec_csr_wrdata_r[25], dec_csr_wrdata_r[24] & ~dec_csr_wrdata_r[25], dec_csr_wrdata_r[23], dec_csr_wrdata_r[22] & ~dec_csr_wrdata_r[23], dec_csr_wrdata_r[21], dec_csr_wrdata_r[20] & ~dec_csr_wrdata_r[21], dec_csr_wrdata_r[19], dec_csr_wrdata_r[18] & ~dec_csr_wrdata_r[19], dec_csr_wrdata_r[17], dec_csr_wrdata_r[16] & ~dec_csr_wrdata_r[17], dec_csr_wrdata_r[15], dec_csr_wrdata_r[14] & ~dec_csr_wrdata_r[15], dec_csr_wrdata_r[13], dec_csr_wrdata_r[12] & ~dec_csr_wrdata_r[13], dec_csr_wrdata_r[11], dec_csr_wrdata_r[10] & ~dec_csr_wrdata_r[11], dec_csr_wrdata_r[9], dec_csr_wrdata_r[8] & ~dec_csr_wrdata_r[9], dec_csr_wrdata_r[7], dec_csr_wrdata_r[6] & ~dec_csr_wrdata_r[7], dec_csr_wrdata_r[5], dec_csr_wrdata_r[4] & ~dec_csr_wrdata_r[5], dec_csr_wrdata_r[3], dec_csr_wrdata_r[2] & ~dec_csr_wrdata_r[3], dec_csr_wrdata_r[1], dec_csr_wrdata_r[0] & ~dec_csr_wrdata_r[1] }; rvdffe #(32) mrac_ff ( .*, .en (wr_mrac_r), .din (mrac_in[31:0]), .dout(mrac[31:0]) ); // drive to LSU/IFU assign dec_tlu_mrac_ff[31:0] = mrac[31:0]; // ---------------------------------------------------------------------- // MDEAU (WAR0) // [31:0] : Dbus Error Address Unlock register // localparam MDEAU = 12'hbc0; assign wr_mdeau_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MDEAU); // ---------------------------------------------------------------------- // MDSEAC (R) // [31:0] : Dbus Store Error Address Capture register // localparam MDSEAC = 12'hfc0; // only capture error bus if the MDSEAC reg is not locked assign mdseac_locked_ns = mdseac_en | (mdseac_locked_f & ~wr_mdeau_r); assign mdseac_en = (lsu_imprecise_error_store_any | lsu_imprecise_error_load_any) & ~nmi_int_detected_f & ~mdseac_locked_f; rvdffe #(32) mdseac_ff ( .*, .en (mdseac_en), .din (lsu_imprecise_error_addr_any[31:0]), .dout(mdseac[31:0]) ); // ---------------------------------------------------------------------- // MPMC (R0W1) // [0] : FW halt // [1] : Set MSTATUS[MIE] on halt localparam MPMC = 12'h7c6; assign wr_mpmc_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MPMC); // allow the cycle of the dbg halt flush that contains the wr_mpmc_r to // set the mstatus bit potentially, use delayed version of internal dbg halt. assign fw_halt_req = wr_mpmc_r & dec_csr_wrdata_r[0] & ~internal_dbg_halt_mode_f2 & ~ext_int_freeze_d1; assign fw_halted_ns = (fw_halt_req | fw_halted) & ~set_mie_pmu_fw_halt; assign mpmc_b_ns[1] = wr_mpmc_r ? ~dec_csr_wrdata_r[1] : ~mpmc[1]; rvdff #(1) mpmc_ff ( .*, .clk (csr_wr_clk), .din (mpmc_b_ns[1]), .dout(mpmc_b[1]) ); assign mpmc[1] = ~mpmc_b[1]; // ---------------------------------------------------------------------- // MICECT (I-Cache error counter/threshold) // [31:27] : Icache parity error threshold // [26:0] : Icache parity error count localparam MICECT = 12'h7f0; assign csr_sat[31:27] = (dec_csr_wrdata_r[31:27] > 5'd26) ? 5'd26 : dec_csr_wrdata_r[31:27]; assign wr_micect_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MICECT); assign micect_inc[26:0] = micect[26:0] + {26'b0, ic_perr_r}; assign micect_ns = wr_micect_r ? {csr_sat[31:27], dec_csr_wrdata_r[26:0]} : {micect[31:27], micect_inc[26:0]}; rvdffe #(32) micect_ff ( .*, .en (wr_micect_r | ic_perr_r), .din (micect_ns[31:0]), .dout(micect[31:0]) ); assign mice_ce_req = |({32'hffffffff << micect[31:27]} &{5'b0, micect[26:0]}); // ---------------------------------------------------------------------- // MICCMECT (ICCM error counter/threshold) // [31:27] : ICCM parity error threshold // [26:0] : ICCM parity error count localparam MICCMECT = 12'h7f1; assign wr_miccmect_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MICCMECT); assign miccmect_inc[26:0] = miccmect[26:0] + {26'b0, iccm_sbecc_r | iccm_dma_sb_error}; assign miccmect_ns = wr_miccmect_r ? {csr_sat[31:27], dec_csr_wrdata_r[26:0]} : {miccmect[31:27], miccmect_inc[26:0]}; rvdffe #(32) miccmect_ff ( .*, .clk (free_l2clk), .en (wr_miccmect_r | iccm_sbecc_r | iccm_dma_sb_error), .din (miccmect_ns[31:0]), .dout(miccmect[31:0]) ); assign miccme_ce_req = |({32'hffffffff << miccmect[31:27]} &{5'b0, miccmect[26:0]}); // ---------------------------------------------------------------------- // MDCCMECT (DCCM error counter/threshold) // [31:27] : DCCM parity error threshold // [26:0] : DCCM parity error count localparam MDCCMECT = 12'h7f2; assign wr_mdccmect_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MDCCMECT); assign mdccmect_inc[26:0] = mdccmect[26:0] + {26'b0, lsu_single_ecc_error_r_d1}; assign mdccmect_ns = wr_mdccmect_r ? {csr_sat[31:27], dec_csr_wrdata_r[26:0]} : {mdccmect[31:27], mdccmect_inc[26:0]}; rvdffe #(32) mdccmect_ff ( .*, .clk (free_l2clk), .en (wr_mdccmect_r | lsu_single_ecc_error_r_d1), .din (mdccmect_ns[31:0]), .dout(mdccmect[31:0]) ); assign mdccme_ce_req = |({32'hffffffff << mdccmect[31:27]} &{5'b0, mdccmect[26:0]}); // ---------------------------------------------------------------------- // MFDHT (Force Debug Halt Threshold) // [5:1] : Halt timeout threshold (power of 2) // [0] : Halt timeout enabled localparam MFDHT = 12'h7ce; assign wr_mfdht_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MFDHT); assign mfdht_ns[5:0] = wr_mfdht_r ? dec_csr_wrdata_r[5:0] : mfdht[5:0]; rvdffs #(6) mfdht_ff ( .*, .clk (csr_wr_clk), .en (wr_mfdht_r), .din (mfdht_ns[5:0]), .dout(mfdht[5:0]) ); // ---------------------------------------------------------------------- // MFDHS(RW) // [1] : LSU operation pending when debug halt threshold reached // [0] : IFU operation pending when debug halt threshold reached localparam MFDHS = 12'h7cf; assign wr_mfdhs_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MFDHS); assign mfdhs_ns[1:0] = wr_mfdhs_r ? dec_csr_wrdata_r[1:0] : ((dbg_tlu_halted & ~dbg_tlu_halted_f) ? {~lsu_idle_any_f, ~ifu_miss_state_idle_f} : mfdhs[1:0]); rvdffs #(2) mfdhs_ff ( .*, .clk (free_clk), .en (wr_mfdhs_r | dbg_tlu_halted), .din (mfdhs_ns[1:0]), .dout(mfdhs[1:0]) ); assign force_halt_ctr[31:0] = debug_halt_req_f ? (force_halt_ctr_f[31:0] + 32'b1) : (dbg_tlu_halted_f ? 32'b0 : force_halt_ctr_f[31:0]); rvdffe #(32) forcehaltctr_ff ( .*, .en (mfdht[0]), .din (force_halt_ctr[31:0]), .dout(force_halt_ctr_f[31:0]) ); assign force_halt = mfdht[0] & |(force_halt_ctr_f[31:0] & (32'hffffffff << mfdht[5:1])); // ---------------------------------------------------------------------- // MEIVT (External Interrupt Vector Table (R/W)) // [31:10]: Base address (R/W) // [9:0] : Reserved, reads 0x0 localparam MEIVT = 12'hbc8; assign wr_meivt_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MEIVT); rvdffe #(22) meivt_ff ( .*, .en (wr_meivt_r), .din (dec_csr_wrdata_r[31:10]), .dout(meivt[31:10]) ); // ---------------------------------------------------------------------- // MEIHAP (External Interrupt Handler Access Pointer (R)) // [31:10]: Base address (R/W) // [9:2] : ClaimID (R) // [1:0] : Reserved, 0x0 localparam MEIHAP = 12'hfc8; assign wr_meihap_r = wr_meicpct_r; rvdffe #(8) meihap_ff ( .*, .en (wr_meihap_r), .din (pic_claimid[7:0]), .dout(meihap[9:2]) ); assign dec_tlu_meihap[31:2] = {meivt[31:10], meihap[9:2]}; // ---------------------------------------------------------------------- // MEICURPL (R/W) // [31:4] : Reserved (read 0x0) // [3:0] : CURRPRI - Priority level of current interrupt service routine (R/W) localparam MEICURPL = 12'hbcc; assign wr_meicurpl_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MEICURPL); assign meicurpl_ns[3:0] = wr_meicurpl_r ? dec_csr_wrdata_r[3:0] : meicurpl[3:0]; rvdff #(4) meicurpl_ff ( .*, .clk (csr_wr_clk), .din (meicurpl_ns[3:0]), .dout(meicurpl[3:0]) ); // PIC needs this reg assign dec_tlu_meicurpl[3:0] = meicurpl[3:0]; // ---------------------------------------------------------------------- // MEICIDPL (R/W) // [31:4] : Reserved (read 0x0) // [3:0] : External Interrupt Claim ID's Priority Level Register localparam MEICIDPL = 12'hbcb; assign wr_meicidpl_r = (dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MEICIDPL)) | take_ext_int_start; assign meicidpl_ns[3:0] = wr_meicpct_r ? pic_pl[3:0] : (wr_meicidpl_r ? dec_csr_wrdata_r[3:0] : meicidpl[3:0]); // ---------------------------------------------------------------------- // MEICPCT (Capture CLAIMID in MEIHAP and PL in MEICIDPL // [31:1] : Reserved (read 0x0) // [0] : Capture (W1, Read 0) localparam MEICPCT = 12'hbca; assign wr_meicpct_r = (dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MEICPCT)) | take_ext_int_start; // ---------------------------------------------------------------------- // MEIPT (External Interrupt Priority Threshold) // [31:4] : Reserved (read 0x0) // [3:0] : PRITHRESH localparam MEIPT = 12'hbc9; assign wr_meipt_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MEIPT); assign meipt_ns[3:0] = wr_meipt_r ? dec_csr_wrdata_r[3:0] : meipt[3:0]; rvdff #(4) meipt_ff ( .*, .clk (csr_wr_clk), .din (meipt_ns[3:0]), .dout(meipt[3:0]) ); // to PIC assign dec_tlu_meipt[3:0] = meipt[3:0]; // ---------------------------------------------------------------------- // DCSR (R/W) (Only accessible in debug mode) // [31:28] : xdebugver (hard coded to 0x4) RO // [27:16] : 0x0, reserved // [15] : ebreakm // [14] : 0x0, reserved // [13] : ebreaks (0x0 for this core) // [12] : ebreaku (0x0 for this core) // [11] : stepie // [10] : stopcount // [9] : 0x0 //stoptime // [8:6] : cause (RO) // [5:4] : 0x0, reserved // [3] : nmip // [2] : step // [1:0] : prv (0x3 for this core) // localparam DCSR = 12'h7b0; // RV has clarified that 'priority 4' in the spec means top priority. // 4. single step. 3. Debugger request. 2. Ebreak. 1. Trigger. // RV debug spec indicates a cause priority change for trigger hits during single step. assign trigger_hit_for_dscr_cause_r_d1 = trigger_hit_dmode_r_d1 | (trigger_hit_r_d1 & dcsr_single_step_done_f); assign dcsr_cause[8:6] = ( ({3{dcsr_single_step_done_f & ~ebreak_to_debug_mode_r_d1 & ~trigger_hit_for_dscr_cause_r_d1 & ~debug_halt_req}} & 3'b100) | ({3{debug_halt_req & ~ebreak_to_debug_mode_r_d1 & ~trigger_hit_for_dscr_cause_r_d1}} & 3'b011) | ({3{ebreak_to_debug_mode_r_d1 & ~trigger_hit_for_dscr_cause_r_d1}} & 3'b001) | ({3{trigger_hit_for_dscr_cause_r_d1}} & 3'b010)); assign wr_dcsr_r = allow_dbg_halt_csr_write & dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == DCSR); // Multiple halt enter requests can happen before we are halted. // We have to continue to upgrade based on dcsr_cause priority but we can't downgrade. assign dcsr_cause_upgradeable = internal_dbg_halt_mode_f & (dcsr[8:6] == 3'b011); assign enter_debug_halt_req_le = enter_debug_halt_req & (~dbg_tlu_halted | dcsr_cause_upgradeable); assign nmi_in_debug_mode = nmi_int_detected_f & internal_dbg_halt_mode_f; assign dcsr_ns[15:2] = enter_debug_halt_req_le ? {dcsr[15:9], dcsr_cause[8:6], dcsr[5:2]} : (wr_dcsr_r ? {dec_csr_wrdata_r[15], 3'b0, dec_csr_wrdata_r[11:10], 1'b0, dcsr[8:6], 2'b00, nmi_in_debug_mode | dcsr[3], dec_csr_wrdata_r[2]} : {dcsr[15:4], nmi_in_debug_mode, dcsr[2]}); rvdffe #(14) dcsr_ff ( .*, .clk (free_l2clk), .en (enter_debug_halt_req_le | wr_dcsr_r | internal_dbg_halt_mode | take_nmi), .din (dcsr_ns[15:2]), .dout(dcsr[15:2]) ); // ---------------------------------------------------------------------- // DPC (R/W) (Only accessible in debug mode) // [31:0] : Debug PC localparam DPC = 12'h7b1; assign wr_dpc_r = allow_dbg_halt_csr_write & dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == DPC); assign dpc_capture_npc = dbg_tlu_halted & ~dbg_tlu_halted_f & ~request_debug_mode_done; assign dpc_capture_pc = request_debug_mode_r; assign dpc_ns[31:1] = ( ({31{~dpc_capture_pc & ~dpc_capture_npc & wr_dpc_r}} & dec_csr_wrdata_r[31:1]) | ({31{dpc_capture_pc}} & pc_r[31:1]) | ({31{~dpc_capture_pc & dpc_capture_npc}} & npc_r[31:1]) ); rvdffe #(31) dpc_ff ( .*, .en (wr_dpc_r | dpc_capture_pc | dpc_capture_npc), .din (dpc_ns[31:1]), .dout(dpc[31:1]) ); // ---------------------------------------------------------------------- // DICAWICS (R/W) (Only accessible in debug mode) // [31:25] : Reserved // [24] : Array select, 0 is data, 1 is tag // [23:22] : Reserved // [21:20] : Way select // [19:17] : Reserved // [16:3] : Index // [2:0] : Reserved localparam DICAWICS = 12'h7c8; assign dicawics_ns[16:0] = { dec_csr_wrdata_r[24], dec_csr_wrdata_r[21:20], dec_csr_wrdata_r[16:3] }; assign wr_dicawics_r = allow_dbg_halt_csr_write & dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == DICAWICS); rvdffe #(17) dicawics_ff ( .*, .en (wr_dicawics_r), .din (dicawics_ns[16:0]), .dout(dicawics[16:0]) ); // ---------------------------------------------------------------------- // DICAD0 (R/W) (Only accessible in debug mode) // // If dicawics[array] is 0 // [31:0] : inst data // // If dicawics[array] is 1 // [31:16] : Tag // [15:7] : Reserved // [6:4] : LRU // [3:1] : Reserved // [0] : Valid localparam DICAD0 = 12'h7c9; assign dicad0_ns[31:0] = wr_dicad0_r ? dec_csr_wrdata_r[31:0] : ifu_ic_debug_rd_data[31:0]; assign wr_dicad0_r = allow_dbg_halt_csr_write & dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == DICAD0); rvdffe #(32) dicad0_ff ( .*, .en (wr_dicad0_r | ifu_ic_debug_rd_data_valid), .din (dicad0_ns[31:0]), .dout(dicad0[31:0]) ); // ---------------------------------------------------------------------- // DICAD0H (R/W) (Only accessible in debug mode) // // If dicawics[array] is 0 // [63:32] : inst data // localparam DICAD0H = 12'h7cc; assign dicad0h_ns[31:0] = wr_dicad0h_r ? dec_csr_wrdata_r[31:0] : ifu_ic_debug_rd_data[63:32]; assign wr_dicad0h_r = allow_dbg_halt_csr_write & dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == DICAD0H); rvdffe #(32) dicad0h_ff ( .*, .en (wr_dicad0h_r | ifu_ic_debug_rd_data_valid), .din (dicad0h_ns[31:0]), .dout(dicad0h[31:0]) ); if (pt.ICACHE_ECC == 1) begin // ---------------------------------------------------------------------- // DICAD1 (R/W) (Only accessible in debug mode) // [6:0] : ECC localparam DICAD1 = 12'h7ca; assign dicad1_ns[6:0] = wr_dicad1_r ? dec_csr_wrdata_r[6:0] : ifu_ic_debug_rd_data[70:64]; assign wr_dicad1_r = allow_dbg_halt_csr_write & dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == DICAD1); rvdffe #( .WIDTH(7), .OVERRIDE(1) ) dicad1_ff ( .*, .en (wr_dicad1_r | ifu_ic_debug_rd_data_valid), .din (dicad1_ns[6:0]), .dout(dicad1_raw[6:0]) ); assign dicad1[31:0] = {25'b0, dicad1_raw[6:0]}; end else begin // ---------------------------------------------------------------------- // DICAD1 (R/W) (Only accessible in debug mode) // [3:0] : Parity localparam DICAD1 = 12'h7ca; assign dicad1_ns[3:0] = wr_dicad1_r ? dec_csr_wrdata_r[3:0] : ifu_ic_debug_rd_data[67:64]; assign wr_dicad1_r = allow_dbg_halt_csr_write & dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == DICAD1); rvdffs #(4) dicad1_ff ( .*, .clk (free_clk), .en (wr_dicad1_r | ifu_ic_debug_rd_data_valid), .din (dicad1_ns[3:0]), .dout(dicad1_raw[3:0]) ); assign dicad1[31:0] = {28'b0, dicad1_raw[3:0]}; end // ---------------------------------------------------------------------- // DICAGO (R/W) (Only accessible in debug mode) // [0] : Go localparam DICAGO = 12'h7cb; if (pt.ICACHE_ECC == 1) assign dec_tlu_ic_diag_pkt.icache_wrdata[70:0] = {dicad1[6:0], dicad0h[31:0], dicad0[31:0]}; else assign dec_tlu_ic_diag_pkt.icache_wrdata[70:0] = { 3'b0, dicad1[3:0], dicad0h[31:0], dicad0[31:0] }; assign dec_tlu_ic_diag_pkt.icache_dicawics[16:0] = dicawics[16:0]; assign icache_rd_valid = allow_dbg_halt_csr_write & dec_csr_any_unq_d & dec_i0_decode_d & ~dec_csr_wen_unq_d & (dec_csr_rdaddr_d[11:0] == DICAGO); assign icache_wr_valid = allow_dbg_halt_csr_write & dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == DICAGO); assign dec_tlu_ic_diag_pkt.icache_rd_valid = icache_rd_valid_f; assign dec_tlu_ic_diag_pkt.icache_wr_valid = icache_wr_valid_f; // ---------------------------------------------------------------------- // MTSEL (R/W) // [1:0] : Trigger select : 00, 01, 10 are data/address triggers. 11 is inst count localparam MTSEL = 12'h7a0; assign wr_mtsel_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MTSEL); assign mtsel_ns[1:0] = wr_mtsel_r ? {dec_csr_wrdata_r[1:0]} : mtsel[1:0]; rvdff #(2) mtsel_ff ( .*, .clk (csr_wr_clk), .din (mtsel_ns[1:0]), .dout(mtsel[1:0]) ); // ---------------------------------------------------------------------- // MTDATA1 (R/W) // [31:0] : Trigger Data 1 localparam MTDATA1 = 12'h7a1; // for triggers 0, 1, 2 and 3 aka Match Control // [31:28] : type, hard coded to 0x2 // [27] : dmode // [26:21] : hard coded to 0x1f // [20] : hit // [19] : select (0 - address, 1 - data) // [18] : timing, always 'before', reads 0x0 // [17:12] : action, bits [17:13] not implemented and reads 0x0 // [11] : chain // [10:7] : match, bits [10:8] not implemented and reads 0x0 // [6] : M // [5:3] : not implemented, reads 0x0 // [2] : execute // [1] : store // [0] : load // // decoder ring // [27] : => 9 // [20] : => 8 // [19] : => 7 // [12] : => 6 // [11] : => 5 // [7] : => 4 // [6] : => 3 // [2] : => 2 // [1] : => 1 // [0] : => 0 // don't allow setting load-data. assign tdata_load = dec_csr_wrdata_r[0] & ~dec_csr_wrdata_r[19]; // don't allow setting execute-data. assign tdata_opcode = dec_csr_wrdata_r[2] & ~dec_csr_wrdata_r[19]; // don't allow clearing DMODE and action=1 assign tdata_action = (dec_csr_wrdata_r[27] & dbg_tlu_halted_f) & dec_csr_wrdata_r[12]; // Chain bit has conditions: WARL for triggers without chains. Force to zero if dmode is 0 but next trigger dmode is 1. assign tdata_chain = mtsel[0] ? 1'b0 : // triggers 1 and 3 chain bit is always zero mtsel[1] ? dec_csr_wrdata_r[11] & ~(mtdata1_t3[MTDATA1_DMODE] & ~dec_csr_wrdata_r[27]) : // trigger 2 dec_csr_wrdata_r[11] & ~(mtdata1_t1[MTDATA1_DMODE] & ~dec_csr_wrdata_r[27]); // trigger 0 // Kill mtdata1 write if dmode=1 but prior trigger has dmode=0/chain=1. Only applies to T1 and T3 assign tdata_kill_write = mtsel[1] ? dec_csr_wrdata_r[27] & (~mtdata1_t2[MTDATA1_DMODE] & mtdata1_t2[MTDATA1_CHAIN]) : // trigger 3 dec_csr_wrdata_r[27] & (~mtdata1_t0[MTDATA1_DMODE] & mtdata1_t0[MTDATA1_CHAIN]) ; // trigger 1 assign tdata_wrdata_r[9:0] = { dec_csr_wrdata_r[27] & dbg_tlu_halted_f, dec_csr_wrdata_r[20:19], tdata_action, tdata_chain, dec_csr_wrdata_r[7:6], tdata_opcode, dec_csr_wrdata_r[1], tdata_load }; // If the DMODE bit is set, tdata1 can only be updated in debug_mode assign wr_mtdata1_t0_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MTDATA1) & (mtsel[1:0] == 2'b0) & (~mtdata1_t0[MTDATA1_DMODE] | dbg_tlu_halted_f); assign mtdata1_t0_ns[9:0] = wr_mtdata1_t0_r ? tdata_wrdata_r[9:0] : {mtdata1_t0[9], update_hit_bit_r[0] | mtdata1_t0[8], mtdata1_t0[7:0]}; assign wr_mtdata1_t1_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MTDATA1) & (mtsel[1:0] == 2'b01) & (~mtdata1_t1[MTDATA1_DMODE] | dbg_tlu_halted_f) & ~tdata_kill_write; assign mtdata1_t1_ns[9:0] = wr_mtdata1_t1_r ? tdata_wrdata_r[9:0] : {mtdata1_t1[9], update_hit_bit_r[1] | mtdata1_t1[8], mtdata1_t1[7:0]}; assign wr_mtdata1_t2_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MTDATA1) & (mtsel[1:0] == 2'b10) & (~mtdata1_t2[MTDATA1_DMODE] | dbg_tlu_halted_f); assign mtdata1_t2_ns[9:0] = wr_mtdata1_t2_r ? tdata_wrdata_r[9:0] : {mtdata1_t2[9], update_hit_bit_r[2] | mtdata1_t2[8], mtdata1_t2[7:0]}; assign wr_mtdata1_t3_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MTDATA1) & (mtsel[1:0] == 2'b11) & (~mtdata1_t3[MTDATA1_DMODE] | dbg_tlu_halted_f) & ~tdata_kill_write; assign mtdata1_t3_ns[9:0] = wr_mtdata1_t3_r ? tdata_wrdata_r[9:0] : {mtdata1_t3[9], update_hit_bit_r[3] | mtdata1_t3[8], mtdata1_t3[7:0]}; rvdffe #(10) mtdata1_t0_ff ( .*, .en (trigger_enabled[0] | wr_mtdata1_t0_r), .din (mtdata1_t0_ns[9:0]), .dout(mtdata1_t0[9:0]) ); rvdffe #(10) mtdata1_t1_ff ( .*, .en (trigger_enabled[1] | wr_mtdata1_t1_r), .din (mtdata1_t1_ns[9:0]), .dout(mtdata1_t1[9:0]) ); rvdffe #(10) mtdata1_t2_ff ( .*, .en (trigger_enabled[2] | wr_mtdata1_t2_r), .din (mtdata1_t2_ns[9:0]), .dout(mtdata1_t2[9:0]) ); rvdffe #(10) mtdata1_t3_ff ( .*, .en (trigger_enabled[3] | wr_mtdata1_t3_r), .din (mtdata1_t3_ns[9:0]), .dout(mtdata1_t3[9:0]) ); assign mtdata1_tsel_out[31:0] = ( ({32{(mtsel[1:0] == 2'b00)}} & {4'h2, mtdata1_t0[9], 6'b011111, mtdata1_t0[8:7], 6'b0, mtdata1_t0[6:5], 3'b0, mtdata1_t0[4:3], 3'b0, mtdata1_t0[2:0]}) | ({32{(mtsel[1:0] == 2'b01)}} & {4'h2, mtdata1_t1[9], 6'b011111, mtdata1_t1[8:7], 6'b0, mtdata1_t1[6:5], 3'b0, mtdata1_t1[4:3], 3'b0, mtdata1_t1[2:0]}) | ({32{(mtsel[1:0] == 2'b10)}} & {4'h2, mtdata1_t2[9], 6'b011111, mtdata1_t2[8:7], 6'b0, mtdata1_t2[6:5], 3'b0, mtdata1_t2[4:3], 3'b0, mtdata1_t2[2:0]}) | ({32{(mtsel[1:0] == 2'b11)}} & {4'h2, mtdata1_t3[9], 6'b011111, mtdata1_t3[8:7], 6'b0, mtdata1_t3[6:5], 3'b0, mtdata1_t3[4:3], 3'b0, mtdata1_t3[2:0]})); assign trigger_pkt_any[0].select = mtdata1_t0[MTDATA1_SEL]; assign trigger_pkt_any[0].match = mtdata1_t0[MTDATA1_MATCH]; assign trigger_pkt_any[0].store = mtdata1_t0[MTDATA1_ST]; assign trigger_pkt_any[0].load = mtdata1_t0[MTDATA1_LD]; assign trigger_pkt_any[0].execute = mtdata1_t0[MTDATA1_EXE]; assign trigger_pkt_any[0].m = mtdata1_t0[MTDATA1_M_ENABLED]; assign trigger_pkt_any[1].select = mtdata1_t1[MTDATA1_SEL]; assign trigger_pkt_any[1].match = mtdata1_t1[MTDATA1_MATCH]; assign trigger_pkt_any[1].store = mtdata1_t1[MTDATA1_ST]; assign trigger_pkt_any[1].load = mtdata1_t1[MTDATA1_LD]; assign trigger_pkt_any[1].execute = mtdata1_t1[MTDATA1_EXE]; assign trigger_pkt_any[1].m = mtdata1_t1[MTDATA1_M_ENABLED]; assign trigger_pkt_any[2].select = mtdata1_t2[MTDATA1_SEL]; assign trigger_pkt_any[2].match = mtdata1_t2[MTDATA1_MATCH]; assign trigger_pkt_any[2].store = mtdata1_t2[MTDATA1_ST]; assign trigger_pkt_any[2].load = mtdata1_t2[MTDATA1_LD]; assign trigger_pkt_any[2].execute = mtdata1_t2[MTDATA1_EXE]; assign trigger_pkt_any[2].m = mtdata1_t2[MTDATA1_M_ENABLED]; assign trigger_pkt_any[3].select = mtdata1_t3[MTDATA1_SEL]; assign trigger_pkt_any[3].match = mtdata1_t3[MTDATA1_MATCH]; assign trigger_pkt_any[3].store = mtdata1_t3[MTDATA1_ST]; assign trigger_pkt_any[3].load = mtdata1_t3[MTDATA1_LD]; assign trigger_pkt_any[3].execute = mtdata1_t3[MTDATA1_EXE]; assign trigger_pkt_any[3].m = mtdata1_t3[MTDATA1_M_ENABLED]; // ---------------------------------------------------------------------- // MTDATA2 (R/W) // [31:0] : Trigger Data 2 localparam MTDATA2 = 12'h7a2; // If the DMODE bit is set, tdata2 can only be updated in debug_mode assign wr_mtdata2_t0_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MTDATA2) & (mtsel[1:0] == 2'b0) & (~mtdata1_t0[MTDATA1_DMODE] | dbg_tlu_halted_f); assign wr_mtdata2_t1_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MTDATA2) & (mtsel[1:0] == 2'b01) & (~mtdata1_t1[MTDATA1_DMODE] | dbg_tlu_halted_f); assign wr_mtdata2_t2_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MTDATA2) & (mtsel[1:0] == 2'b10) & (~mtdata1_t2[MTDATA1_DMODE] | dbg_tlu_halted_f); assign wr_mtdata2_t3_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MTDATA2) & (mtsel[1:0] == 2'b11) & (~mtdata1_t3[MTDATA1_DMODE] | dbg_tlu_halted_f); rvdffe #(32) mtdata2_t0_ff ( .*, .en (wr_mtdata2_t0_r), .din (dec_csr_wrdata_r[31:0]), .dout(mtdata2_t0[31:0]) ); rvdffe #(32) mtdata2_t1_ff ( .*, .en (wr_mtdata2_t1_r), .din (dec_csr_wrdata_r[31:0]), .dout(mtdata2_t1[31:0]) ); rvdffe #(32) mtdata2_t2_ff ( .*, .en (wr_mtdata2_t2_r), .din (dec_csr_wrdata_r[31:0]), .dout(mtdata2_t2[31:0]) ); rvdffe #(32) mtdata2_t3_ff ( .*, .en (wr_mtdata2_t3_r), .din (dec_csr_wrdata_r[31:0]), .dout(mtdata2_t3[31:0]) ); assign mtdata2_tsel_out[31:0] = ( ({32{(mtsel[1:0] == 2'b00)}} & mtdata2_t0[31:0]) | ({32{(mtsel[1:0] == 2'b01)}} & mtdata2_t1[31:0]) | ({32{(mtsel[1:0] == 2'b10)}} & mtdata2_t2[31:0]) | ({32{(mtsel[1:0] == 2'b11)}} & mtdata2_t3[31:0])); assign trigger_pkt_any[0].tdata2[31:0] = mtdata2_t0[31:0]; assign trigger_pkt_any[1].tdata2[31:0] = mtdata2_t1[31:0]; assign trigger_pkt_any[2].tdata2[31:0] = mtdata2_t2[31:0]; assign trigger_pkt_any[3].tdata2[31:0] = mtdata2_t3[31:0]; //---------------------------------------------------------------------- // Performance Monitor Counters section starts //---------------------------------------------------------------------- localparam MHPME_NOEVENT = 10'd0; localparam MHPME_CLK_ACTIVE = 10'd1; // OOP - out of pipe localparam MHPME_ICACHE_HIT = 10'd2; // OOP localparam MHPME_ICACHE_MISS = 10'd3; // OOP localparam MHPME_INST_COMMIT = 10'd4; localparam MHPME_INST_COMMIT_16B = 10'd5; localparam MHPME_INST_COMMIT_32B = 10'd6; localparam MHPME_INST_ALIGNED = 10'd7; // OOP localparam MHPME_INST_DECODED = 10'd8; // OOP localparam MHPME_INST_MUL = 10'd9; localparam MHPME_INST_DIV = 10'd10; localparam MHPME_INST_LOAD = 10'd11; localparam MHPME_INST_STORE = 10'd12; localparam MHPME_INST_MALOAD = 10'd13; localparam MHPME_INST_MASTORE = 10'd14; localparam MHPME_INST_ALU = 10'd15; localparam MHPME_INST_CSRREAD = 10'd16; localparam MHPME_INST_CSRRW = 10'd17; localparam MHPME_INST_CSRWRITE = 10'd18; localparam MHPME_INST_EBREAK = 10'd19; localparam MHPME_INST_ECALL = 10'd20; localparam MHPME_INST_FENCE = 10'd21; localparam MHPME_INST_FENCEI = 10'd22; localparam MHPME_INST_MRET = 10'd23; localparam MHPME_INST_BRANCH = 10'd24; localparam MHPME_BRANCH_MP = 10'd25; localparam MHPME_BRANCH_TAKEN = 10'd26; localparam MHPME_BRANCH_NOTP = 10'd27; localparam MHPME_FETCH_STALL = 10'd28; // OOP localparam MHPME_DECODE_STALL = 10'd30; // OOP localparam MHPME_POSTSYNC_STALL = 10'd31; // OOP localparam MHPME_PRESYNC_STALL = 10'd32; // OOP localparam MHPME_LSU_SB_WB_STALL = 10'd34; // OOP localparam MHPME_DMA_DCCM_STALL = 10'd35; // OOP localparam MHPME_DMA_ICCM_STALL = 10'd36; // OOP localparam MHPME_EXC_TAKEN = 10'd37; localparam MHPME_TIMER_INT_TAKEN = 10'd38; localparam MHPME_EXT_INT_TAKEN = 10'd39; localparam MHPME_FLUSH_LOWER = 10'd40; localparam MHPME_BR_ERROR = 10'd41; localparam MHPME_IBUS_TRANS = 10'd42; // OOP localparam MHPME_DBUS_TRANS = 10'd43; // OOP localparam MHPME_DBUS_MA_TRANS = 10'd44; // OOP localparam MHPME_IBUS_ERROR = 10'd45; // OOP localparam MHPME_DBUS_ERROR = 10'd46; // OOP localparam MHPME_IBUS_STALL = 10'd47; // OOP localparam MHPME_DBUS_STALL = 10'd48; // OOP localparam MHPME_INT_DISABLED = 10'd49; // OOP localparam MHPME_INT_STALLED = 10'd50; // OOP localparam MHPME_INST_BITMANIP = 10'd54; localparam MHPME_DBUS_LOAD = 10'd55; localparam MHPME_DBUS_STORE = 10'd56; // Counts even during sleep state localparam MHPME_SLEEP_CYC = 10'd512; // OOP localparam MHPME_DMA_READ_ALL = 10'd513; // OOP localparam MHPME_DMA_WRITE_ALL = 10'd514; // OOP localparam MHPME_DMA_READ_DCCM = 10'd515; // OOP localparam MHPME_DMA_WRITE_DCCM = 10'd516; // OOP // Pack the event selects into a vector for genvar assign mhpme_vec[0][9:0] = mhpme3[9:0]; assign mhpme_vec[1][9:0] = mhpme4[9:0]; assign mhpme_vec[2][9:0] = mhpme5[9:0]; assign mhpme_vec[3][9:0] = mhpme6[9:0]; // only consider committed itypes //logic [3:0] pmu_i0_itype_qual; assign pmu_i0_itype_qual[3:0] = dec_tlu_packet_r.pmu_i0_itype[3:0] & {4{tlu_i0_commit_cmt}}; // Generate the muxed incs for all counters based on event type for (genvar i = 0; i < 4; i++) begin assign mhpmc_inc_r[i] = {{~mcountinhibit[i+3]}} & ( ({1{(mhpme_vec[i][9:0] == MHPME_CLK_ACTIVE )}} & 1'b1) | ({1{(mhpme_vec[i][9:0] == MHPME_ICACHE_HIT )}} & {ifu_pmu_ic_hit}) | ({1{(mhpme_vec[i][9:0] == MHPME_ICACHE_MISS )}} & {ifu_pmu_ic_miss}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_COMMIT )}} & {tlu_i0_commit_cmt & ~illegal_r}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_COMMIT_16B )}} & {tlu_i0_commit_cmt & ~exu_pmu_i0_pc4 & ~illegal_r}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_COMMIT_32B )}} & {tlu_i0_commit_cmt & exu_pmu_i0_pc4 & ~illegal_r}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_ALIGNED )}} & ifu_pmu_instr_aligned) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_DECODED )}} & dec_pmu_instr_decoded) | ({1{(mhpme_vec[i][9:0] == MHPME_DECODE_STALL )}} & {dec_pmu_decode_stall}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_MUL )}} & {(pmu_i0_itype_qual == MUL)}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_DIV )}} & {dec_tlu_packet_r.pmu_divide & tlu_i0_commit_cmt & ~illegal_r}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_LOAD )}} & {(pmu_i0_itype_qual == LOAD)}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_STORE )}} & {(pmu_i0_itype_qual == STORE)}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_MALOAD )}} & {(pmu_i0_itype_qual == LOAD)} & {1{dec_tlu_packet_r.pmu_lsu_misaligned}}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_MASTORE )}} & {(pmu_i0_itype_qual == STORE)} & {1{dec_tlu_packet_r.pmu_lsu_misaligned}}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_ALU )}} & {(pmu_i0_itype_qual == ALU)}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_CSRREAD )}} & {(pmu_i0_itype_qual == CSRREAD)}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_CSRWRITE )}} & {(pmu_i0_itype_qual == CSRWRITE)})| ({1{(mhpme_vec[i][9:0] == MHPME_INST_CSRRW )}} & {(pmu_i0_itype_qual == CSRRW)}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_EBREAK )}} & {(pmu_i0_itype_qual == EBREAK)}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_ECALL )}} & {(pmu_i0_itype_qual == ECALL)}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_FENCE )}} & {(pmu_i0_itype_qual == FENCE)}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_FENCEI )}} & {(pmu_i0_itype_qual == FENCEI)}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_MRET )}} & {(pmu_i0_itype_qual == MRET)}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_BRANCH )}} & { ((pmu_i0_itype_qual == CONDBR) | (pmu_i0_itype_qual == JAL))}) | ({1{(mhpme_vec[i][9:0] == MHPME_BRANCH_MP )}} & {exu_pmu_i0_br_misp & tlu_i0_commit_cmt & ~illegal_r}) | ({1{(mhpme_vec[i][9:0] == MHPME_BRANCH_TAKEN )}} & {exu_pmu_i0_br_ataken & tlu_i0_commit_cmt & ~illegal_r}) | ({1{(mhpme_vec[i][9:0] == MHPME_BRANCH_NOTP )}} & {dec_tlu_packet_r.pmu_i0_br_unpred & tlu_i0_commit_cmt & ~illegal_r}) | ({1{(mhpme_vec[i][9:0] == MHPME_FETCH_STALL )}} & { ifu_pmu_fetch_stall}) | ({1{(mhpme_vec[i][9:0] == MHPME_DECODE_STALL )}} & { dec_pmu_decode_stall}) | ({1{(mhpme_vec[i][9:0] == MHPME_POSTSYNC_STALL )}} & {dec_pmu_postsync_stall}) | ({1{(mhpme_vec[i][9:0] == MHPME_PRESYNC_STALL )}} & {dec_pmu_presync_stall}) | ({1{(mhpme_vec[i][9:0] == MHPME_LSU_SB_WB_STALL )}} & { lsu_store_stall_any}) | ({1{(mhpme_vec[i][9:0] == MHPME_DMA_DCCM_STALL )}} & { dma_dccm_stall_any}) | ({1{(mhpme_vec[i][9:0] == MHPME_DMA_ICCM_STALL )}} & { dma_iccm_stall_any}) | ({1{(mhpme_vec[i][9:0] == MHPME_EXC_TAKEN )}} & { (i0_exception_valid_r | i0_trigger_hit_r | lsu_exc_valid_r)}) | ({1{(mhpme_vec[i][9:0] == MHPME_TIMER_INT_TAKEN )}} & { take_timer_int | take_int_timer0_int | take_int_timer1_int}) | ({1{(mhpme_vec[i][9:0] == MHPME_EXT_INT_TAKEN )}} & { take_ext_int}) | ({1{(mhpme_vec[i][9:0] == MHPME_FLUSH_LOWER )}} & { tlu_flush_lower_r}) | ({1{(mhpme_vec[i][9:0] == MHPME_BR_ERROR )}} & {(dec_tlu_br0_error_r | dec_tlu_br0_start_error_r) & rfpc_i0_r}) | ({1{(mhpme_vec[i][9:0] == MHPME_IBUS_TRANS )}} & {ifu_pmu_bus_trxn}) | ({1{(mhpme_vec[i][9:0] == MHPME_DBUS_TRANS )}} & {lsu_pmu_bus_trxn}) | ({1{(mhpme_vec[i][9:0] == MHPME_DBUS_MA_TRANS )}} & {lsu_pmu_bus_misaligned}) | ({1{(mhpme_vec[i][9:0] == MHPME_IBUS_ERROR )}} & {ifu_pmu_bus_error}) | ({1{(mhpme_vec[i][9:0] == MHPME_DBUS_ERROR )}} & {lsu_pmu_bus_error}) | ({1{(mhpme_vec[i][9:0] == MHPME_IBUS_STALL )}} & {ifu_pmu_bus_busy}) | ({1{(mhpme_vec[i][9:0] == MHPME_DBUS_STALL )}} & {lsu_pmu_bus_busy}) | ({1{(mhpme_vec[i][9:0] == MHPME_INT_DISABLED )}} & {~mstatus[MSTATUS_MIE]}) | ({1{(mhpme_vec[i][9:0] == MHPME_INT_STALLED )}} & {~mstatus[MSTATUS_MIE] & |(mip[5:0] & mie[5:0])}) | ({1{(mhpme_vec[i][9:0] == MHPME_INST_BITMANIP )}} & {(pmu_i0_itype_qual == BITMANIPU)}) | ({1{(mhpme_vec[i][9:0] == MHPME_DBUS_LOAD )}} & {tlu_i0_commit_cmt & lsu_pmu_load_external_r & ~illegal_r}) | ({1{(mhpme_vec[i][9:0] == MHPME_DBUS_STORE )}} & {tlu_i0_commit_cmt & lsu_pmu_store_external_r & ~illegal_r}) | // These count even during sleep ({1{(mhpme_vec[i][9:0] == MHPME_SLEEP_CYC )}} & {dec_tlu_pmu_fw_halted}) | ({1{(mhpme_vec[i][9:0] == MHPME_DMA_READ_ALL )}} & {dma_pmu_any_read}) | ({1{(mhpme_vec[i][9:0] == MHPME_DMA_WRITE_ALL )}} & {dma_pmu_any_write}) | ({1{(mhpme_vec[i][9:0] == MHPME_DMA_READ_DCCM )}} & {dma_pmu_dccm_read}) | ({1{(mhpme_vec[i][9:0] == MHPME_DMA_WRITE_DCCM )}} & {dma_pmu_dccm_write}) ); end if (pt.FAST_INTERRUPT_REDIRECT) rvdffie #(31) mstatus_ff ( .*, .clk(free_l2clk), .din({ mdseac_locked_ns, lsu_single_ecc_error_r, lsu_exc_valid_r, lsu_i0_exc_r, take_ext_int_start, take_ext_int_start_d1, take_ext_int_start_d2, ext_int_freeze, mip_ns[5:0], mcyclel_cout & ~wr_mcycleh_r & mcyclel_cout_in, minstret_enable, minstretl_cout_ns, fw_halted_ns, meicidpl_ns[3:0], icache_rd_valid, icache_wr_valid, mhpmc_inc_r[3:0], perfcnt_halted, mstatus_ns[1:0] }), .dout({ mdseac_locked_f, lsu_single_ecc_error_r_d1, lsu_exc_valid_r_d1, lsu_i0_exc_r_d1, take_ext_int_start_d1, take_ext_int_start_d2, take_ext_int_start_d3, ext_int_freeze_d1, mip[5:0], mcyclel_cout_f, minstret_enable_f, minstretl_cout_f, fw_halted, meicidpl[3:0], icache_rd_valid_f, icache_wr_valid_f, mhpmc_inc_r_d1[3:0], perfcnt_halted_d1, mstatus[1:0] }) ); else rvdffie #(27) mstatus_ff ( .*, .clk(free_l2clk), .din({ mdseac_locked_ns, lsu_single_ecc_error_r, lsu_exc_valid_r, lsu_i0_exc_r, mip_ns[5:0], mcyclel_cout & ~wr_mcycleh_r & mcyclel_cout_in, minstret_enable, minstretl_cout_ns, fw_halted_ns, meicidpl_ns[3:0], icache_rd_valid, icache_wr_valid, mhpmc_inc_r[3:0], perfcnt_halted, mstatus_ns[1:0] }), .dout({ mdseac_locked_f, lsu_single_ecc_error_r_d1, lsu_exc_valid_r_d1, lsu_i0_exc_r_d1, mip[5:0], mcyclel_cout_f, minstret_enable_f, minstretl_cout_f, fw_halted, meicidpl[3:0], icache_rd_valid_f, icache_wr_valid_f, mhpmc_inc_r_d1[3:0], perfcnt_halted_d1, mstatus[1:0] }) ); assign perfcnt_halted = ((dec_tlu_dbg_halted & dcsr[DCSR_STOPC]) | dec_tlu_pmu_fw_halted); assign perfcnt_during_sleep[3:0] = {4{~(dec_tlu_dbg_halted & dcsr[DCSR_STOPC])}} & {mhpme_vec[3][9],mhpme_vec[2][9],mhpme_vec[1][9],mhpme_vec[0][9]}; assign dec_tlu_perfcnt0 = mhpmc_inc_r_d1[0] & ~(perfcnt_halted_d1 & ~perfcnt_during_sleep[0]); assign dec_tlu_perfcnt1 = mhpmc_inc_r_d1[1] & ~(perfcnt_halted_d1 & ~perfcnt_during_sleep[1]); assign dec_tlu_perfcnt2 = mhpmc_inc_r_d1[2] & ~(perfcnt_halted_d1 & ~perfcnt_during_sleep[2]); assign dec_tlu_perfcnt3 = mhpmc_inc_r_d1[3] & ~(perfcnt_halted_d1 & ~perfcnt_during_sleep[3]); // ---------------------------------------------------------------------- // MHPMC3H(RW), MHPMC3(RW) // [63:32][31:0] : Hardware Performance Monitor Counter 3 localparam MHPMC3 = 12'hB03; localparam MHPMC3H = 12'hB83; assign mhpmc3_wr_en0 = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPMC3); assign mhpmc3_wr_en1 = (~perfcnt_halted | perfcnt_during_sleep[0]) & (|(mhpmc_inc_r[0])); assign mhpmc3_wr_en = mhpmc3_wr_en0 | mhpmc3_wr_en1; assign mhpmc3_incr[63:0] = {mhpmc3h[31:0], mhpmc3[31:0]} + {63'b0, 1'b1}; assign mhpmc3_ns[31:0] = mhpmc3_wr_en0 ? dec_csr_wrdata_r[31:0] : mhpmc3_incr[31:0]; rvdffe #(32) mhpmc3_ff ( .*, .clk (free_l2clk), .en (mhpmc3_wr_en), .din (mhpmc3_ns[31:0]), .dout(mhpmc3[31:0]) ); assign mhpmc3h_wr_en0 = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPMC3H); assign mhpmc3h_wr_en = mhpmc3h_wr_en0 | mhpmc3_wr_en1; assign mhpmc3h_ns[31:0] = mhpmc3h_wr_en0 ? dec_csr_wrdata_r[31:0] : mhpmc3_incr[63:32]; rvdffe #(32) mhpmc3h_ff ( .*, .clk (free_l2clk), .en (mhpmc3h_wr_en), .din (mhpmc3h_ns[31:0]), .dout(mhpmc3h[31:0]) ); // ---------------------------------------------------------------------- // MHPMC4H(RW), MHPMC4(RW) // [63:32][31:0] : Hardware Performance Monitor Counter 4 localparam MHPMC4 = 12'hB04; localparam MHPMC4H = 12'hB84; assign mhpmc4_wr_en0 = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPMC4); assign mhpmc4_wr_en1 = (~perfcnt_halted | perfcnt_during_sleep[1]) & (|(mhpmc_inc_r[1])); assign mhpmc4_wr_en = mhpmc4_wr_en0 | mhpmc4_wr_en1; assign mhpmc4_incr[63:0] = {mhpmc4h[31:0], mhpmc4[31:0]} + {63'b0, 1'b1}; assign mhpmc4_ns[31:0] = mhpmc4_wr_en0 ? dec_csr_wrdata_r[31:0] : mhpmc4_incr[31:0]; rvdffe #(32) mhpmc4_ff ( .*, .clk (free_l2clk), .en (mhpmc4_wr_en), .din (mhpmc4_ns[31:0]), .dout(mhpmc4[31:0]) ); assign mhpmc4h_wr_en0 = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPMC4H); assign mhpmc4h_wr_en = mhpmc4h_wr_en0 | mhpmc4_wr_en1; assign mhpmc4h_ns[31:0] = mhpmc4h_wr_en0 ? dec_csr_wrdata_r[31:0] : mhpmc4_incr[63:32]; rvdffe #(32) mhpmc4h_ff ( .*, .clk (free_l2clk), .en (mhpmc4h_wr_en), .din (mhpmc4h_ns[31:0]), .dout(mhpmc4h[31:0]) ); // ---------------------------------------------------------------------- // MHPMC5H(RW), MHPMC5(RW) // [63:32][31:0] : Hardware Performance Monitor Counter 5 localparam MHPMC5 = 12'hB05; localparam MHPMC5H = 12'hB85; assign mhpmc5_wr_en0 = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPMC5); assign mhpmc5_wr_en1 = (~perfcnt_halted | perfcnt_during_sleep[2]) & (|(mhpmc_inc_r[2])); assign mhpmc5_wr_en = mhpmc5_wr_en0 | mhpmc5_wr_en1; assign mhpmc5_incr[63:0] = {mhpmc5h[31:0], mhpmc5[31:0]} + {63'b0, 1'b1}; assign mhpmc5_ns[31:0] = mhpmc5_wr_en0 ? dec_csr_wrdata_r[31:0] : mhpmc5_incr[31:0]; rvdffe #(32) mhpmc5_ff ( .*, .clk (free_l2clk), .en (mhpmc5_wr_en), .din (mhpmc5_ns[31:0]), .dout(mhpmc5[31:0]) ); assign mhpmc5h_wr_en0 = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPMC5H); assign mhpmc5h_wr_en = mhpmc5h_wr_en0 | mhpmc5_wr_en1; assign mhpmc5h_ns[31:0] = mhpmc5h_wr_en0 ? dec_csr_wrdata_r[31:0] : mhpmc5_incr[63:32]; rvdffe #(32) mhpmc5h_ff ( .*, .clk (free_l2clk), .en (mhpmc5h_wr_en), .din (mhpmc5h_ns[31:0]), .dout(mhpmc5h[31:0]) ); // ---------------------------------------------------------------------- // MHPMC6H(RW), MHPMC6(RW) // [63:32][31:0] : Hardware Performance Monitor Counter 6 localparam MHPMC6 = 12'hB06; localparam MHPMC6H = 12'hB86; assign mhpmc6_wr_en0 = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPMC6); assign mhpmc6_wr_en1 = (~perfcnt_halted | perfcnt_during_sleep[3]) & (|(mhpmc_inc_r[3])); assign mhpmc6_wr_en = mhpmc6_wr_en0 | mhpmc6_wr_en1; assign mhpmc6_incr[63:0] = {mhpmc6h[31:0], mhpmc6[31:0]} + {63'b0, 1'b1}; assign mhpmc6_ns[31:0] = mhpmc6_wr_en0 ? dec_csr_wrdata_r[31:0] : mhpmc6_incr[31:0]; rvdffe #(32) mhpmc6_ff ( .*, .clk (free_l2clk), .en (mhpmc6_wr_en), .din (mhpmc6_ns[31:0]), .dout(mhpmc6[31:0]) ); assign mhpmc6h_wr_en0 = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPMC6H); assign mhpmc6h_wr_en = mhpmc6h_wr_en0 | mhpmc6_wr_en1; assign mhpmc6h_ns[31:0] = mhpmc6h_wr_en0 ? dec_csr_wrdata_r[31:0] : mhpmc6_incr[63:32]; rvdffe #(32) mhpmc6h_ff ( .*, .clk (free_l2clk), .en (mhpmc6h_wr_en), .din (mhpmc6h_ns[31:0]), .dout(mhpmc6h[31:0]) ); // ---------------------------------------------------------------------- // MHPME3(RW) // [9:0] : Hardware Performance Monitor Event 3 localparam MHPME3 = 12'h323; // we only have events 0-56 with holes, 512-516, HPME* are WARL so zero otherwise. assign zero_event_r = ( (dec_csr_wrdata_r[9:0] > 10'd516) | (|dec_csr_wrdata_r[31:10]) | ((dec_csr_wrdata_r[9:0] < 10'd512) & (dec_csr_wrdata_r[9:0] > 10'd56)) | ((dec_csr_wrdata_r[9:0] < 10'd54) & (dec_csr_wrdata_r[9:0] > 10'd50)) | (dec_csr_wrdata_r[9:0] == 10'd29) | (dec_csr_wrdata_r[9:0] == 10'd33) ); assign event_r[9:0] = zero_event_r ? '0 : dec_csr_wrdata_r[9:0]; assign wr_mhpme3_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPME3); rvdffe #(10) mhpme3_ff ( .*, .en (wr_mhpme3_r), .din (event_r[9:0]), .dout(mhpme3[9:0]) ); // ---------------------------------------------------------------------- // MHPME4(RW) // [9:0] : Hardware Performance Monitor Event 4 localparam MHPME4 = 12'h324; assign wr_mhpme4_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPME4); rvdffe #(10) mhpme4_ff ( .*, .en (wr_mhpme4_r), .din (event_r[9:0]), .dout(mhpme4[9:0]) ); // ---------------------------------------------------------------------- // MHPME5(RW) // [9:0] : Hardware Performance Monitor Event 5 localparam MHPME5 = 12'h325; assign wr_mhpme5_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPME5); rvdffe #(10) mhpme5_ff ( .*, .en (wr_mhpme5_r), .din (event_r[9:0]), .dout(mhpme5[9:0]) ); // ---------------------------------------------------------------------- // MHPME6(RW) // [9:0] : Hardware Performance Monitor Event 6 localparam MHPME6 = 12'h326; assign wr_mhpme6_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MHPME6); rvdffe #(10) mhpme6_ff ( .*, .en (wr_mhpme6_r), .din (event_r[9:0]), .dout(mhpme6[9:0]) ); //---------------------------------------------------------------------- // Performance Monitor Counters section ends //---------------------------------------------------------------------- // ---------------------------------------------------------------------- // MCOUNTINHIBIT(RW) // [31:7] : Reserved, read 0x0 // [6] : HPM6 disable // [5] : HPM5 disable // [4] : HPM4 disable // [3] : HPM3 disable // [2] : MINSTRET disable // [1] : reserved, read 0x0 // [0] : MCYCLE disable localparam MCOUNTINHIBIT = 12'h320; assign wr_mcountinhibit_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MCOUNTINHIBIT); rvdffs #(6) mcountinhibit_ff ( .*, .clk (csr_wr_clk), .en (wr_mcountinhibit_r), .din ({dec_csr_wrdata_r[6:2], dec_csr_wrdata_r[0]}), .dout({mcountinhibit[6:2], mcountinhibit[0]}) ); assign mcountinhibit[1] = 1'b0; //-------------------------------------------------------------------------------- // trace //-------------------------------------------------------------------------------- logic [4:0] dec_tlu_exc_cause_wb1_raw, dec_tlu_exc_cause_wb2; logic dec_tlu_int_valid_wb1_raw, dec_tlu_int_valid_wb2; assign {dec_tlu_i0_valid_wb1, dec_tlu_i0_exc_valid_wb1, dec_tlu_exc_cause_wb1_raw[4:0], dec_tlu_int_valid_wb1_raw} = {8{~dec_tlu_trace_disable}} & {i0_valid_wb, i0_exception_valid_r_d1 | lsu_i0_exc_r_d1 | (trigger_hit_r_d1 & ~trigger_hit_dmode_r_d1), exc_cause_wb[4:0], interrupt_valid_r_d1}; // skid buffer for ints, reduces trace port count by 1 rvdffie #( .WIDTH(6), .OVERRIDE(1) ) traceskidff ( .*, .clk (clk), .din ({dec_tlu_exc_cause_wb1_raw[4:0], dec_tlu_int_valid_wb1_raw}), .dout({dec_tlu_exc_cause_wb2[4:0], dec_tlu_int_valid_wb2}) ); //skid for ints assign dec_tlu_exc_cause_wb1[4:0] = dec_tlu_int_valid_wb2 ? dec_tlu_exc_cause_wb2[4:0] : dec_tlu_exc_cause_wb1_raw[4:0]; assign dec_tlu_int_valid_wb1 = dec_tlu_int_valid_wb2; assign dec_tlu_mtval_wb1 = mtval[31:0]; // end trace //-------------------------------------------------------------------------------- // ---------------------------------------------------------------------- // CSR read mux // ---------------------------------------------------------------------- // file "csrdecode" is human readable file that has all of the CSR decodes defined and is part of git repo // modify this file as needed // to generate all the equations below from "csrdecode" except legal equation: // 1) coredecode -in csrdecode > corecsrdecode.e // 2) espresso -Dso -oeqntott corecsrdecode.e | addassign > csrequations // to generate the legal CSR equation below: // 1) coredecode -in csrdecode -legal > csrlegal.e // 2) espresso -Dso -oeqntott csrlegal.e | addassign > csrlegal_equation // coredecode -in csrdecode > corecsrdecode.e; espresso -Dso -oeqntott corecsrdecode.e | addassign > csrequations; coredecode -in csrdecode -legal > csrlegal.e; espresso -Dso -oeqntott csrlegal.e | addassign > csrlegal_equation assign csr_misa = (!dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[0]); assign csr_mvendorid = (dec_csr_rdaddr_d[10]&!dec_csr_rdaddr_d[7] &!dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]); assign csr_marchid = (dec_csr_rdaddr_d[10]&!dec_csr_rdaddr_d[7] &dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mimpid = (dec_csr_rdaddr_d[10]&!dec_csr_rdaddr_d[6] &dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]); assign csr_mhartid = (dec_csr_rdaddr_d[10] & !dec_csr_rdaddr_d[7] & dec_csr_rdaddr_d[2]); assign csr_mstatus = (!dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[0]); assign csr_mtvec = (!dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[0]); assign csr_mip = (!dec_csr_rdaddr_d[7] & dec_csr_rdaddr_d[6] & dec_csr_rdaddr_d[2]); assign csr_mie = (!dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[0]); assign csr_mcyclel = (dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[7] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2] &!dec_csr_rdaddr_d[1]); assign csr_mcycleh = (dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1]); assign csr_minstretl = (!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_minstreth = (!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[7] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mscratch = (!dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mepc = (!dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[1] &dec_csr_rdaddr_d[0]); assign csr_mcause = (!dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6] &dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mscause = (dec_csr_rdaddr_d[6] & dec_csr_rdaddr_d[5] & dec_csr_rdaddr_d[2]); assign csr_mtval = (!dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[1] &dec_csr_rdaddr_d[0]); assign csr_mrac = (!dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[5] &!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1]); assign csr_dmst = (dec_csr_rdaddr_d[10]&!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3] &dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1]); assign csr_mdseac = (dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[10] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]); assign csr_meihap = (dec_csr_rdaddr_d[11] & dec_csr_rdaddr_d[10] & dec_csr_rdaddr_d[3]); assign csr_meivt = (!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[6] &dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1] &!dec_csr_rdaddr_d[0]); assign csr_meipt = (dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[1] &dec_csr_rdaddr_d[0]); assign csr_meicurpl = (dec_csr_rdaddr_d[11] & dec_csr_rdaddr_d[6] & dec_csr_rdaddr_d[2]); assign csr_meicidpl = (dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[6] &dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]); assign csr_dcsr = (dec_csr_rdaddr_d[10]&!dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[0]); assign csr_mcgc = (dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[0]); assign csr_mfdc = (dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]); assign csr_dpc = (dec_csr_rdaddr_d[10]&!dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[0]); assign csr_mtsel = (dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mtdata1 = (dec_csr_rdaddr_d[10]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[0]); assign csr_mtdata2 = (dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[5] &!dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[1]); assign csr_mhpmc3 = (dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[7] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[0]); assign csr_mhpmc4 = (dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[7] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2] &!dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mhpmc5 = (dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[7] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[1] &dec_csr_rdaddr_d[0]); assign csr_mhpmc6 = (!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[5] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mhpmc3h = (dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[1] &dec_csr_rdaddr_d[0]); assign csr_mhpmc4h = (dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2] &!dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mhpmc5h = (dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1] &dec_csr_rdaddr_d[0]); assign csr_mhpmc6h = (dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mhpme3 = (!dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[5] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[0]); assign csr_mhpme4 = (dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1] &!dec_csr_rdaddr_d[0]); assign csr_mhpme5 = (dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1] &dec_csr_rdaddr_d[0]); assign csr_mhpme6 = (dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[1] &!dec_csr_rdaddr_d[0]); assign csr_mcountinhibit = (!dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[5] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2] &!dec_csr_rdaddr_d[0]); assign csr_mitctl0 = (dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mitctl1 = (dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[3] &dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]); assign csr_mitb0 = (dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[0]); assign csr_mitb1 = (dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mitcnt0 = (dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[0]); assign csr_mitcnt1 = (dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[2] &!dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]); assign csr_mpmc = (dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3] &dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[1]); assign csr_meicpct = (dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[6] &dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_micect = (dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_miccmect = (dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[5] &!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[0]); assign csr_mdccmect = (dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mfdht = (dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_mfdhs = (dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[0]); assign csr_dicawics = (!dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1] &!dec_csr_rdaddr_d[0]); assign csr_dicad0h = (dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[3] &dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1]); assign csr_dicad0 = (dec_csr_rdaddr_d[10]&!dec_csr_rdaddr_d[4] &dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]); assign csr_dicad1 = (dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]); assign csr_dicago = (dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]); assign presync = (dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]) | (!dec_csr_rdaddr_d[7] &dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[0]) | (dec_csr_rdaddr_d[5] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2] &!dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]) | (!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[1]) | (dec_csr_rdaddr_d[11] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[1] &!dec_csr_rdaddr_d[0]) | (dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1]) | ( dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[1]); assign postsync = (dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]) | (!dec_csr_rdaddr_d[11] &!dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[0]) | (!dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]) | (dec_csr_rdaddr_d[10] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[0]) | ( !dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2] &!dec_csr_rdaddr_d[0]) | (!dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[7] &dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[1]) | (dec_csr_rdaddr_d[10]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[1]); assign legal = (!dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6] &dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]) | (!dec_csr_rdaddr_d[11] &!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8] &!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[1]) | ( !dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6] &dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]) | ( dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8] &dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5] &!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1] &!dec_csr_rdaddr_d[0]) | (dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[10] &dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8]&!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[0]) | (!dec_csr_rdaddr_d[11] &dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8] &dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]) | (!dec_csr_rdaddr_d[11] &dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8] &dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1]) | ( dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8] &!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2] &dec_csr_rdaddr_d[0]) | (!dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[10] &dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8]&dec_csr_rdaddr_d[7] &!dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1]) | (!dec_csr_rdaddr_d[11] &!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8] &!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[2]) | (dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3] &dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]) | ( !dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[3] &dec_csr_rdaddr_d[1]) | (!dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[10] &dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8]&dec_csr_rdaddr_d[7] &dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[2]) | (dec_csr_rdaddr_d[11] &dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8]&!dec_csr_rdaddr_d[7] &!dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2]&dec_csr_rdaddr_d[1]) | ( !dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6] &dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[1]&dec_csr_rdaddr_d[0]) | ( dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[5] &!dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2]) | ( dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[5] &!dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[1] &!dec_csr_rdaddr_d[0]) | (dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[10] &dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8]&!dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[2]) | (!dec_csr_rdaddr_d[11] &dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8] &dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[3]&dec_csr_rdaddr_d[1]) | ( !dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4]&!dec_csr_rdaddr_d[0]) | ( !dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&dec_csr_rdaddr_d[7]&dec_csr_rdaddr_d[6] &!dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4]&dec_csr_rdaddr_d[3] &!dec_csr_rdaddr_d[2]) | (!dec_csr_rdaddr_d[11]&dec_csr_rdaddr_d[10] &dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8]&dec_csr_rdaddr_d[7] &!dec_csr_rdaddr_d[6]&dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2]&!dec_csr_rdaddr_d[0]) | ( dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&!dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5] &dec_csr_rdaddr_d[1]) | (!dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[10] &dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8]&!dec_csr_rdaddr_d[7] &dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[2]) | (!dec_csr_rdaddr_d[11] &!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8] &!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[5]&!dec_csr_rdaddr_d[4] &!dec_csr_rdaddr_d[3]&!dec_csr_rdaddr_d[1]&!dec_csr_rdaddr_d[0]) | ( !dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6] &dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[3]) | (dec_csr_rdaddr_d[11] &!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8] &!dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[3]) | ( !dec_csr_rdaddr_d[11]&!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9] &dec_csr_rdaddr_d[8]&!dec_csr_rdaddr_d[7]&!dec_csr_rdaddr_d[6] &dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[4]) | (dec_csr_rdaddr_d[11] &!dec_csr_rdaddr_d[10]&dec_csr_rdaddr_d[9]&dec_csr_rdaddr_d[8] &!dec_csr_rdaddr_d[6]&!dec_csr_rdaddr_d[5]&dec_csr_rdaddr_d[4]); assign dec_tlu_presync_d = presync & dec_csr_any_unq_d & ~dec_csr_wen_unq_d; assign dec_tlu_postsync_d = postsync & dec_csr_any_unq_d; // allow individual configuration of these features assign conditionally_illegal = ((csr_mitcnt0 | csr_mitcnt1 | csr_mitb0 | csr_mitb1 | csr_mitctl0 | csr_mitctl1) & !pt.TIMER_LEGAL_EN); assign valid_csr = ( legal & (~(csr_dcsr | csr_dpc | csr_dmst | csr_dicawics | csr_dicad0 | csr_dicad0h | csr_dicad1 | csr_dicago) | dbg_tlu_halted_f) & ~fast_int_meicpct & ~conditionally_illegal); assign dec_csr_legal_d = (dec_csr_any_unq_d & valid_csr & // of a valid CSR ~(dec_csr_wen_unq_d & (csr_mvendorid | csr_marchid | csr_mimpid | csr_mhartid | csr_mdseac | csr_meihap)) // that's not a write to a RO CSR ); // CSR read mux assign dec_csr_rddata_d[31:0] = ( ({32{csr_misa}} & 32'h40001104) | ({32{csr_mvendorid}} & 32'h00000045) | ({32{csr_marchid}} & 32'h00000010) | ({32{csr_mimpid}} & 32'h4) | ({32{csr_mhartid}} & {core_id[31:4], 4'b0}) | ({32{csr_mstatus}} & {19'b0, 2'b11, 3'b0, mstatus[1], 3'b0, mstatus[0], 3'b0}) | ({32{csr_mtvec}} & {mtvec[30:1], 1'b0, mtvec[0]}) | ({32{csr_mip}} & {1'b0, mip[5:3], 16'b0, mip[2], 3'b0, mip[1], 3'b0, mip[0], 3'b0}) | ({32{csr_mie}} & {1'b0, mie[5:3], 16'b0, mie[2], 3'b0, mie[1], 3'b0, mie[0], 3'b0}) | ({32{csr_mcyclel}} & mcyclel[31:0]) | ({32{csr_mcycleh}} & mcycleh_inc[31:0]) | ({32{csr_minstretl}} & minstretl_read[31:0]) | ({32{csr_minstreth}} & minstreth_read[31:0]) | ({32{csr_mscratch}} & mscratch[31:0]) | ({32{csr_mepc}} & {mepc[31:1], 1'b0}) | ({32{csr_mcause}} & mcause[31:0]) | ({32{csr_mscause}} & {28'b0, mscause[3:0]}) | ({32{csr_mtval}} & mtval[31:0]) | ({32{csr_mrac}} & mrac[31:0]) | ({32{csr_mdseac}} & mdseac[31:0]) | ({32{csr_meivt}} & {meivt[31:10], 10'b0}) | ({32{csr_meihap}} & {meivt[31:10], meihap[9:2], 2'b0}) | ({32{csr_meicurpl}} & {28'b0, meicurpl[3:0]}) | ({32{csr_meicidpl}} & {28'b0, meicidpl[3:0]}) | ({32{csr_meipt}} & {28'b0, meipt[3:0]}) | ({32{csr_mcgc}} & {22'b0, mcgc[9:0]}) | ({32{csr_mfdc}} & {13'b0, mfdc[18:0]}) | ({32{csr_dcsr}} & {16'h4000, dcsr[15:2], 2'b11}) | ({32{csr_dpc}} & {dpc[31:1], 1'b0}) | ({32{csr_dicad0}} & dicad0[31:0]) | ({32{csr_dicad0h}} & dicad0h[31:0]) | ({32{csr_dicad1}} & dicad1[31:0]) | ({32{csr_dicawics}} & {7'b0, dicawics[16], 2'b0, dicawics[15:14], 3'b0, dicawics[13:0], 3'b0}) | ({32{csr_mtsel}} & {30'b0, mtsel[1:0]}) | ({32{csr_mtdata1}} & {mtdata1_tsel_out[31:0]}) | ({32{csr_mtdata2}} & {mtdata2_tsel_out[31:0]}) | ({32{csr_micect}} & {micect[31:0]}) | ({32{csr_miccmect}} & {miccmect[31:0]}) | ({32{csr_mdccmect}} & {mdccmect[31:0]}) | ({32{csr_mhpmc3}} & mhpmc3[31:0]) | ({32{csr_mhpmc4}} & mhpmc4[31:0]) | ({32{csr_mhpmc5}} & mhpmc5[31:0]) | ({32{csr_mhpmc6}} & mhpmc6[31:0]) | ({32{csr_mhpmc3h}} & mhpmc3h[31:0]) | ({32{csr_mhpmc4h}} & mhpmc4h[31:0]) | ({32{csr_mhpmc5h}} & mhpmc5h[31:0]) | ({32{csr_mhpmc6h}} & mhpmc6h[31:0]) | ({32{csr_mfdht}} & {26'b0, mfdht[5:0]}) | ({32{csr_mfdhs}} & {30'b0, mfdhs[1:0]}) | ({32{csr_mhpme3}} & {22'b0,mhpme3[9:0]}) | ({32{csr_mhpme4}} & {22'b0,mhpme4[9:0]}) | ({32{csr_mhpme5}} & {22'b0,mhpme5[9:0]}) | ({32{csr_mhpme6}} & {22'b0,mhpme6[9:0]}) | ({32{csr_mcountinhibit}} & {25'b0, mcountinhibit[6:0]}) | ({32{csr_mpmc}} & {30'b0, mpmc[1], 1'b0}) | ({32{dec_timer_read_d}} & dec_timer_rddata_d[31:0]) ); endmodule // el2_dec_tlu_ctl module el2_dec_timer_ctl #( `include "el2_param.vh" ) ( input logic clk, input logic free_l2clk, input logic csr_wr_clk, input logic rst_l, input logic dec_csr_wen_r_mod, // csr write enable at wb input logic [11:0] dec_csr_wraddr_r, // write address for csr input logic [31:0] dec_csr_wrdata_r, // csr write data at wb input logic csr_mitctl0, input logic csr_mitctl1, input logic csr_mitb0, input logic csr_mitb1, input logic csr_mitcnt0, input logic csr_mitcnt1, input logic dec_pause_state, // Paused input logic dec_tlu_pmu_fw_halted, // pmu/fw halted input logic internal_dbg_halt_timers, // debug halted output logic [31:0] dec_timer_rddata_d, // timer CSR read data output logic dec_timer_read_d, // timer CSR address match output logic dec_timer_t0_pulse, // timer0 int output logic dec_timer_t1_pulse, // timer1 int input logic scan_mode ); localparam MITCTL_ENABLE = 0; localparam MITCTL_ENABLE_HALTED = 1; localparam MITCTL_ENABLE_PAUSED = 2; logic [31:0] mitcnt0_ns, mitcnt0, mitcnt1_ns, mitcnt1, mitb0, mitb1, mitb0_b, mitb1_b, mitcnt0_inc, mitcnt1_inc; logic [2:0] mitctl0_ns, mitctl0; logic [3:0] mitctl1_ns, mitctl1; logic wr_mitcnt0_r, wr_mitcnt1_r, wr_mitb0_r, wr_mitb1_r, wr_mitctl0_r, wr_mitctl1_r; logic mitcnt0_inc_ok, mitcnt1_inc_ok; logic mitcnt0_inc_cout, mitcnt1_inc_cout; logic mit0_match_ns; logic mit1_match_ns; logic mitctl0_0_b_ns; logic mitctl0_0_b; logic mitctl1_0_b_ns; logic mitctl1_0_b; assign mit0_match_ns = (mitcnt0[31:0] >= mitb0[31:0]); assign mit1_match_ns = (mitcnt1[31:0] >= mitb1[31:0]); assign dec_timer_t0_pulse = mit0_match_ns; assign dec_timer_t1_pulse = mit1_match_ns; // ---------------------------------------------------------------------- // MITCNT0 (RW) // [31:0] : Internal Timer Counter 0 localparam MITCNT0 = 12'h7d2; assign wr_mitcnt0_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MITCNT0); assign mitcnt0_inc_ok = mitctl0[MITCTL_ENABLE] & (~dec_pause_state | mitctl0[MITCTL_ENABLE_PAUSED]) & (~dec_tlu_pmu_fw_halted | mitctl0[MITCTL_ENABLE_HALTED]) & ~internal_dbg_halt_timers; assign {mitcnt0_inc_cout, mitcnt0_inc[7:0]} = mitcnt0[7:0] + {7'b0, 1'b1}; assign mitcnt0_inc[31:8] = mitcnt0[31:8] + {23'b0, mitcnt0_inc_cout}; assign mitcnt0_ns[31:0] = wr_mitcnt0_r ? dec_csr_wrdata_r[31:0] : mit0_match_ns ? 'b0 : mitcnt0_inc[31:0]; rvdffe #(24) mitcnt0_ffb ( .*, .clk (free_l2clk), .en (wr_mitcnt0_r | (mitcnt0_inc_ok & mitcnt0_inc_cout) | mit0_match_ns), .din (mitcnt0_ns[31:8]), .dout(mitcnt0[31:8]) ); rvdffe #(8) mitcnt0_ffa ( .*, .clk (free_l2clk), .en (wr_mitcnt0_r | mitcnt0_inc_ok | mit0_match_ns), .din (mitcnt0_ns[7:0]), .dout(mitcnt0[7:0]) ); // ---------------------------------------------------------------------- // MITCNT1 (RW) // [31:0] : Internal Timer Counter 0 localparam MITCNT1 = 12'h7d5; assign wr_mitcnt1_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MITCNT1); assign mitcnt1_inc_ok = mitctl1[MITCTL_ENABLE] & (~dec_pause_state | mitctl1[MITCTL_ENABLE_PAUSED]) & (~dec_tlu_pmu_fw_halted | mitctl1[MITCTL_ENABLE_HALTED]) & ~internal_dbg_halt_timers & (~mitctl1[3] | mit0_match_ns); // only inc MITCNT1 if not cascaded with 0, or if 0 overflows assign {mitcnt1_inc_cout, mitcnt1_inc[7:0]} = mitcnt1[7:0] + {7'b0, 1'b1}; assign mitcnt1_inc[31:8] = mitcnt1[31:8] + {23'b0, mitcnt1_inc_cout}; assign mitcnt1_ns[31:0] = wr_mitcnt1_r ? dec_csr_wrdata_r[31:0] : mit1_match_ns ? 'b0 : mitcnt1_inc[31:0]; rvdffe #(24) mitcnt1_ffb ( .*, .clk (free_l2clk), .en (wr_mitcnt1_r | (mitcnt1_inc_ok & mitcnt1_inc_cout) | mit1_match_ns), .din (mitcnt1_ns[31:8]), .dout(mitcnt1[31:8]) ); rvdffe #(8) mitcnt1_ffa ( .*, .clk (free_l2clk), .en (wr_mitcnt1_r | mitcnt1_inc_ok | mit1_match_ns), .din (mitcnt1_ns[7:0]), .dout(mitcnt1[7:0]) ); // ---------------------------------------------------------------------- // MITB0 (RW) // [31:0] : Internal Timer Bound 0 localparam MITB0 = 12'h7d3; assign wr_mitb0_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MITB0); rvdffe #(32) mitb0_ff ( .*, .en (wr_mitb0_r), .din (~dec_csr_wrdata_r[31:0]), .dout(mitb0_b[31:0]) ); assign mitb0[31:0] = ~mitb0_b[31:0]; // ---------------------------------------------------------------------- // MITB1 (RW) // [31:0] : Internal Timer Bound 1 localparam MITB1 = 12'h7d6; assign wr_mitb1_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MITB1); rvdffe #(32) mitb1_ff ( .*, .en (wr_mitb1_r), .din (~dec_csr_wrdata_r[31:0]), .dout(mitb1_b[31:0]) ); assign mitb1[31:0] = ~mitb1_b[31:0]; // ---------------------------------------------------------------------- // MITCTL0 (RW) Internal Timer Ctl 0 // [31:3] : Reserved, reads 0x0 // [2] : Enable while PAUSEd // [1] : Enable while HALTed // [0] : Enable (resets to 0x1) localparam MITCTL0 = 12'h7d4; assign wr_mitctl0_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MITCTL0); assign mitctl0_ns[2:0] = wr_mitctl0_r ? {dec_csr_wrdata_r[2:0]} : {mitctl0[2:0]}; assign mitctl0_0_b_ns = ~mitctl0_ns[0]; rvdffs #(3) mitctl0_ff ( .*, .clk (csr_wr_clk), .en (wr_mitctl0_r), .din ({mitctl0_ns[2:1], mitctl0_0_b_ns}), .dout({mitctl0[2:1], mitctl0_0_b}) ); assign mitctl0[0] = ~mitctl0_0_b; // ---------------------------------------------------------------------- // MITCTL1 (RW) Internal Timer Ctl 1 // [31:4] : Reserved, reads 0x0 // [3] : Cascade // [2] : Enable while PAUSEd // [1] : Enable while HALTed // [0] : Enable (resets to 0x1) localparam MITCTL1 = 12'h7d7; assign wr_mitctl1_r = dec_csr_wen_r_mod & (dec_csr_wraddr_r[11:0] == MITCTL1); assign mitctl1_ns[3:0] = wr_mitctl1_r ? {dec_csr_wrdata_r[3:0]} : {mitctl1[3:0]}; assign mitctl1_0_b_ns = ~mitctl1_ns[0]; rvdffs #(4) mitctl1_ff ( .*, .clk (csr_wr_clk), .en (wr_mitctl1_r), .din ({mitctl1_ns[3:1], mitctl1_0_b_ns}), .dout({mitctl1[3:1], mitctl1_0_b}) ); assign mitctl1[0] = ~mitctl1_0_b; assign dec_timer_read_d = csr_mitcnt1 | csr_mitcnt0 | csr_mitb1 | csr_mitb0 | csr_mitctl0 | csr_mitctl1; assign dec_timer_rddata_d[31:0] = ( ({32{csr_mitcnt0}} & mitcnt0[31:0]) | ({32{csr_mitcnt1}} & mitcnt1[31:0]) | ({32{csr_mitb0}} & mitb0[31:0]) | ({32{csr_mitb1}} & mitb1[31:0]) | ({32{csr_mitctl0}} & {29'b0, mitctl0[2:0]}) | ({32{csr_mitctl1}} & {28'b0, mitctl1[3:0]}) ); endmodule // dec_timer_ctl