// SPDX-License-Identifier: Apache-2.0 // Copyright 2019 Western Digital Corporation or its 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. //******************************************************************************** // $Id$ // // // Owner: // Function: Clock Generation Block // Comments: All the clocks are generate here // // //******************************************************************************** module lsu_clkdomain import swerv_types::*; ( input logic clk, // clock input logic free_clk, // clock input logic rst_l, // reset // Inputs input logic clk_override, // chciken bit to turn off clock gating input logic lsu_freeze_dc3, // freeze input logic addr_in_dccm_dc2, // address in dccm input logic addr_in_pic_dc2, // address is in pic input logic dma_dccm_req, // dma is active input logic dma_mem_write, // dma write is active input logic load_stbuf_reqvld_dc3, // instruction to stbuf input logic store_stbuf_reqvld_dc3, // instruction to stbuf input logic stbuf_reqvld_any, // stbuf is draining input logic stbuf_reqvld_flushed_any, // instruction going to stbuf is flushed input logic lsu_busreq_dc5, // busreq in dc5 input logic lsu_bus_buffer_pend_any, // bus buffer has a pending bus entry input logic lsu_bus_buffer_empty_any, // external bus buffer is empty input logic lsu_stbuf_empty_any, // stbuf is empty //input logic lsu_load_stall_any, // Need to turn on clocks for this case input logic lsu_bus_clk_en, // bus clock enable input lsu_pkt_t lsu_p, // lsu packet in decode input lsu_pkt_t lsu_pkt_dc1, // lsu packet in dc1 input lsu_pkt_t lsu_pkt_dc2, // lsu packet in dc2 input lsu_pkt_t lsu_pkt_dc3, // lsu packet in dc3 input lsu_pkt_t lsu_pkt_dc4, // lsu packet in dc4 input lsu_pkt_t lsu_pkt_dc5, // lsu packet in dc5 // Outputs output logic lsu_c1_dc3_clk, // dc3 pipe single pulse clock output logic lsu_c1_dc4_clk, // dc4 pipe single pulse clock output logic lsu_c1_dc5_clk, // dc5 pipe single pulse clock output logic lsu_c2_dc3_clk, // dc3 pipe double pulse clock output logic lsu_c2_dc4_clk, // dc4 pipe double pulse clock output logic lsu_c2_dc5_clk, // dc5 pipe double pulse clock output logic lsu_store_c1_dc1_clk, // store in dc1 output logic lsu_store_c1_dc2_clk, // store in dc2 output logic lsu_store_c1_dc3_clk, // store in dc3 output logic lsu_store_c1_dc4_clk, // store in dc4 output logic lsu_store_c1_dc5_clk, // store in dc5 output logic lsu_freeze_c1_dc1_clk, // freeze output logic lsu_freeze_c1_dc2_clk, // freeze output logic lsu_freeze_c1_dc3_clk, // freeze output logic lsu_freeze_c2_dc1_clk, output logic lsu_freeze_c2_dc2_clk, output logic lsu_freeze_c2_dc3_clk, output logic lsu_freeze_c2_dc4_clk, output logic lsu_dccm_c1_dc3_clk, // dccm clock output logic lsu_pic_c1_dc3_clk, // pic clock output logic lsu_stbuf_c1_clk, output logic lsu_bus_obuf_c1_clk, // ibuf clock output logic lsu_bus_ibuf_c1_clk, // ibuf clock output logic lsu_bus_buf_c1_clk, // ibuf clock output logic lsu_busm_clk, // bus clock output logic lsu_free_c2_clk, input logic scan_mode ); logic lsu_c1_dc1_clken, lsu_c1_dc2_clken, lsu_c1_dc3_clken, lsu_c1_dc4_clken, lsu_c1_dc5_clken; logic lsu_c2_dc3_clken, lsu_c2_dc4_clken, lsu_c2_dc5_clken; logic lsu_c1_dc1_clken_q, lsu_c1_dc2_clken_q, lsu_c1_dc3_clken_q, lsu_c1_dc4_clken_q, lsu_c1_dc5_clken_q; logic lsu_store_c1_dc1_clken, lsu_store_c1_dc2_clken, lsu_store_c1_dc3_clken, lsu_store_c1_dc4_clken, lsu_store_c1_dc5_clken; logic lsu_freeze_c1_dc1_clken, lsu_freeze_c1_dc2_clken, lsu_freeze_c1_dc3_clken, lsu_freeze_c1_dc4_clken; logic lsu_freeze_c2_dc1_clken, lsu_freeze_c2_dc2_clken, lsu_freeze_c2_dc3_clken, lsu_freeze_c2_dc4_clken; logic lsu_freeze_c1_dc1_clken_q, lsu_freeze_c1_dc2_clken_q, lsu_freeze_c1_dc3_clken_q, lsu_freeze_c1_dc4_clken_q; logic lsu_stbuf_c1_clken; logic lsu_bus_ibuf_c1_clken, lsu_bus_obuf_c1_clken, lsu_bus_buf_c1_clken; logic lsu_dccm_c1_dc3_clken, lsu_pic_c1_dc3_clken; logic lsu_free_c1_clken, lsu_free_c1_clken_q, lsu_free_c2_clken; logic lsu_bus_valid_clken; //------------------------------------------------------------------------------------------- // Clock Enable logic //------------------------------------------------------------------------------------------- // Also use the flopped clock enable. We want to turn on the clocks from dc1->dc5 even if there is a freeze assign lsu_c1_dc1_clken = lsu_p.valid | dma_dccm_req | clk_override; assign lsu_c1_dc2_clken = lsu_pkt_dc1.valid | lsu_c1_dc1_clken_q | clk_override; assign lsu_c1_dc3_clken = lsu_pkt_dc2.valid | lsu_c1_dc2_clken_q | clk_override; assign lsu_c1_dc4_clken = lsu_pkt_dc3.valid | lsu_c1_dc3_clken_q | clk_override; assign lsu_c1_dc5_clken = lsu_pkt_dc4.valid | lsu_c1_dc4_clken_q | clk_override; assign lsu_c2_dc3_clken = lsu_c1_dc3_clken | lsu_c1_dc3_clken_q | clk_override; assign lsu_c2_dc4_clken = lsu_c1_dc4_clken | lsu_c1_dc4_clken_q | clk_override; assign lsu_c2_dc5_clken = lsu_c1_dc5_clken | lsu_c1_dc5_clken_q | clk_override; assign lsu_store_c1_dc1_clken = ((lsu_c1_dc1_clken & (lsu_p.store | dma_mem_write)) | clk_override) & ~lsu_freeze_dc3; assign lsu_store_c1_dc2_clken = ((lsu_c1_dc2_clken & lsu_pkt_dc1.store) | clk_override) & ~lsu_freeze_dc3; assign lsu_store_c1_dc3_clken = ((lsu_c1_dc3_clken & lsu_pkt_dc2.store) | clk_override) & ~lsu_freeze_dc3; assign lsu_store_c1_dc4_clken = (lsu_c1_dc4_clken & lsu_pkt_dc3.store) | clk_override; assign lsu_store_c1_dc5_clken = (lsu_c1_dc5_clken & lsu_pkt_dc4.store) | clk_override; assign lsu_freeze_c1_dc1_clken = (lsu_p.valid | dma_dccm_req | clk_override) & ~lsu_freeze_dc3; assign lsu_freeze_c1_dc2_clken = (lsu_pkt_dc1.valid | clk_override) & ~lsu_freeze_dc3; assign lsu_freeze_c1_dc3_clken = (lsu_pkt_dc2.valid | clk_override) & ~lsu_freeze_dc3; assign lsu_freeze_c1_dc4_clken = (lsu_pkt_dc3.valid | clk_override) & ~lsu_freeze_dc3; assign lsu_freeze_c2_dc1_clken = (lsu_freeze_c1_dc1_clken | lsu_freeze_c1_dc1_clken_q | clk_override) & ~lsu_freeze_dc3; assign lsu_freeze_c2_dc2_clken = (lsu_freeze_c1_dc2_clken | lsu_freeze_c1_dc2_clken_q | clk_override) & ~lsu_freeze_dc3; assign lsu_freeze_c2_dc3_clken = (lsu_freeze_c1_dc3_clken | lsu_freeze_c1_dc3_clken_q | clk_override) & ~lsu_freeze_dc3; assign lsu_freeze_c2_dc4_clken = (lsu_freeze_c1_dc4_clken | lsu_freeze_c1_dc4_clken_q | clk_override) & ~lsu_freeze_dc3; assign lsu_stbuf_c1_clken = load_stbuf_reqvld_dc3 | store_stbuf_reqvld_dc3 | stbuf_reqvld_any | stbuf_reqvld_flushed_any | clk_override; assign lsu_bus_ibuf_c1_clken = lsu_busreq_dc5 | clk_override; assign lsu_bus_obuf_c1_clken = ((lsu_bus_buffer_pend_any | lsu_busreq_dc5) & lsu_bus_clk_en) | clk_override; assign lsu_bus_buf_c1_clken = ~lsu_bus_buffer_empty_any | lsu_busreq_dc5 | clk_override; assign lsu_dccm_c1_dc3_clken = ((lsu_c1_dc3_clken & addr_in_dccm_dc2) | clk_override) & ~lsu_freeze_dc3; assign lsu_pic_c1_dc3_clken = ((lsu_c1_dc3_clken & addr_in_pic_dc2) | clk_override) & ~lsu_freeze_dc3; assign lsu_free_c1_clken = (lsu_p.valid | lsu_pkt_dc1.valid | lsu_pkt_dc2.valid | lsu_pkt_dc3.valid | lsu_pkt_dc4.valid | lsu_pkt_dc5.valid) | ~lsu_bus_buffer_empty_any | ~lsu_stbuf_empty_any | clk_override; assign lsu_free_c2_clken = lsu_free_c1_clken | lsu_free_c1_clken_q | clk_override; // Flops rvdff #(1) lsu_free_c1_clkenff (.din(lsu_free_c1_clken), .dout(lsu_free_c1_clken_q), .clk(free_clk), .*); rvdff #(1) lsu_c1_dc1_clkenff (.din(lsu_c1_dc1_clken), .dout(lsu_c1_dc1_clken_q), .clk(lsu_free_c2_clk), .*); rvdff #(1) lsu_c1_dc2_clkenff (.din(lsu_c1_dc2_clken), .dout(lsu_c1_dc2_clken_q), .clk(lsu_free_c2_clk), .*); rvdff #(1) lsu_c1_dc3_clkenff (.din(lsu_c1_dc3_clken), .dout(lsu_c1_dc3_clken_q), .clk(lsu_free_c2_clk), .*); rvdff #(1) lsu_c1_dc4_clkenff (.din(lsu_c1_dc4_clken), .dout(lsu_c1_dc4_clken_q), .clk(lsu_free_c2_clk), .*); rvdff #(1) lsu_c1_dc5_clkenff (.din(lsu_c1_dc5_clken), .dout(lsu_c1_dc5_clken_q), .clk(lsu_free_c2_clk), .*); rvdff #(1) lsu_freeze_c1_dc1_clkenff (.din(lsu_freeze_c1_dc1_clken), .dout(lsu_freeze_c1_dc1_clken_q), .clk(lsu_freeze_c2_dc1_clk), .*); rvdff #(1) lsu_freeze_c1_dc2_clkenff (.din(lsu_freeze_c1_dc2_clken), .dout(lsu_freeze_c1_dc2_clken_q), .clk(lsu_freeze_c2_dc2_clk), .*); rvdff #(1) lsu_freeze_c1_dc3_clkenff (.din(lsu_freeze_c1_dc3_clken), .dout(lsu_freeze_c1_dc3_clken_q), .clk(lsu_freeze_c2_dc3_clk), .*); rvdff #(1) lsu_freeze_c1_dc4_clkenff (.din(lsu_freeze_c1_dc4_clken), .dout(lsu_freeze_c1_dc4_clken_q), .clk(lsu_freeze_c2_dc4_clk), .*); // Clock Headers rvclkhdr lsu_c1dc3_cgc ( .en(lsu_c1_dc3_clken), .l1clk(lsu_c1_dc3_clk), .* ); rvclkhdr lsu_c1dc4_cgc ( .en(lsu_c1_dc4_clken), .l1clk(lsu_c1_dc4_clk), .* ); rvclkhdr lsu_c1dc5_cgc ( .en(lsu_c1_dc5_clken), .l1clk(lsu_c1_dc5_clk), .* ); rvclkhdr lsu_c2dc3_cgc ( .en(lsu_c2_dc3_clken), .l1clk(lsu_c2_dc3_clk), .* ); rvclkhdr lsu_c2dc4_cgc ( .en(lsu_c2_dc4_clken), .l1clk(lsu_c2_dc4_clk), .* ); rvclkhdr lsu_c2dc5_cgc ( .en(lsu_c2_dc5_clken), .l1clk(lsu_c2_dc5_clk), .* ); rvclkhdr lsu_store_c1dc1_cgc (.en(lsu_store_c1_dc1_clken), .l1clk(lsu_store_c1_dc1_clk), .*); rvclkhdr lsu_store_c1dc2_cgc (.en(lsu_store_c1_dc2_clken), .l1clk(lsu_store_c1_dc2_clk), .*); rvclkhdr lsu_store_c1dc3_cgc (.en(lsu_store_c1_dc3_clken), .l1clk(lsu_store_c1_dc3_clk), .*); rvclkhdr lsu_store_c1dc4_cgc (.en(lsu_store_c1_dc4_clken), .l1clk(lsu_store_c1_dc4_clk), .*); rvclkhdr lsu_store_c1dc5_cgc (.en(lsu_store_c1_dc5_clken), .l1clk(lsu_store_c1_dc5_clk), .*); rvclkhdr lsu_freeze_c1dc1_cgc ( .en(lsu_freeze_c1_dc1_clken), .l1clk(lsu_freeze_c1_dc1_clk), .* ); rvclkhdr lsu_freeze_c1dc2_cgc ( .en(lsu_freeze_c1_dc2_clken), .l1clk(lsu_freeze_c1_dc2_clk), .* ); rvclkhdr lsu_freeze_c1dc3_cgc ( .en(lsu_freeze_c1_dc3_clken), .l1clk(lsu_freeze_c1_dc3_clk), .* ); rvclkhdr lsu_freeze_c2dc1_cgc ( .en(lsu_freeze_c2_dc1_clken), .l1clk(lsu_freeze_c2_dc1_clk), .* ); rvclkhdr lsu_freeze_c2dc2_cgc ( .en(lsu_freeze_c2_dc2_clken), .l1clk(lsu_freeze_c2_dc2_clk), .* ); rvclkhdr lsu_freeze_c2dc3_cgc ( .en(lsu_freeze_c2_dc3_clken), .l1clk(lsu_freeze_c2_dc3_clk), .* ); rvclkhdr lsu_freeze_c2dc4_cgc ( .en(lsu_freeze_c2_dc4_clken), .l1clk(lsu_freeze_c2_dc4_clk), .* ); rvclkhdr lsu_stbuf_c1_cgc ( .en(lsu_stbuf_c1_clken), .l1clk(lsu_stbuf_c1_clk), .* ); rvclkhdr lsu_bus_ibuf_c1_cgc ( .en(lsu_bus_ibuf_c1_clken), .l1clk(lsu_bus_ibuf_c1_clk), .* ); rvclkhdr lsu_bus_obuf_c1_cgc ( .en(lsu_bus_obuf_c1_clken), .l1clk(lsu_bus_obuf_c1_clk), .* ); rvclkhdr lsu_bus_buf_c1_cgc ( .en(lsu_bus_buf_c1_clken), .l1clk(lsu_bus_buf_c1_clk), .* ); rvclkhdr lsu_busm_cgc (.en(lsu_bus_clk_en), .l1clk(lsu_busm_clk), .*); rvclkhdr lsu_dccm_c1dc3_cgc (.en(lsu_dccm_c1_dc3_clken), .l1clk(lsu_dccm_c1_dc3_clk), .*); rvclkhdr lsu_pic_c1dc3_cgc (.en(lsu_pic_c1_dc3_clken), .l1clk(lsu_pic_c1_dc3_clk), .*); rvclkhdr lsu_free_cgc (.en(lsu_free_c2_clken), .l1clk(lsu_free_c2_clk), .*); endmodule