dff278ea05
Increase DTM idle cycle hint to 8 cycles -- see #6
2022-10-19 21:11:18 +01:00
1953773ca5
Don't gate exception into D-mode CSR write, as a valid CSR instruction
...
writing to a valid CSR in D-mode is guaranteed not to raise any exception
(particularly the external data0 CSR is of interest)
2022-10-10 22:15:56 +01:00
ae4ddf7001
Clean up the old/unused W_COUNTER parameter, and use a cleaner tie-off style for the counter CSRs
2022-10-10 16:33:31 +01:00
f771a1294d
Alias DPC to the real program counter, small savings overall
2022-10-10 00:28:42 +01:00
aa438fc37c
Remove op_b (rs2) register from muldiv_seq for modest LUT/FF savings
2022-10-08 18:22:16 +01:00
d3667769d2
Arrange for address buses to be 0 when processor is held in reset
2022-10-08 16:50:58 +01:00
633a07fef9
Tidy up priority tie-offs in irq_ctrl
2022-10-08 16:25:05 +01:00
5e7bf0d604
Don't reset register file by default
2022-10-08 16:24:28 +01:00
f329d30713
Typo in docs introduction
2022-10-08 15:10:45 +01:00
489480dc80
Revise default config values, and update docs with new values
2022-10-08 08:43:25 +01:00
0b18fae32e
Fix swapped MHARTID/MCONFIGPTR values in tb configs
2022-10-08 08:42:50 +01:00
874cb20910
Add config headers to tb_cxxrtl instead of using defparams in Makefile
2022-10-08 08:09:26 +01:00
8721bd3deb
Add RISC-V timer to example soc, and tweak ULX3S config
2022-10-07 03:11:36 +01:00
a18c3018e1
Bump riscv-formal to head of hazard3 branch, not sure what happened there
2022-10-07 01:35:10 +01:00
bf1bca2ca5
Remove FPGA synth netlist checked in by mistake
2022-10-06 16:00:27 +01:00
1036d15467
Clean up duplicate declaration of external_irq_pending in hazard3_irq_ctrl
2022-10-06 15:59:54 +01:00
4b94c9a2d4
Document new configuration for IRQ and PMPM extensions
2022-10-06 00:19:13 +01:00
e6aaf4b801
Avoid IRQ to bus through-path when custom IRQs are disabled
2022-10-06 00:16:10 +01:00
c55d3f0d0b
Make custom IRQ and PMP functionality optional. Factor out IRQ controller into separate module.
2022-10-05 23:53:04 +01:00
d1d70efa60
Fix some width issues introduced by last commit
2022-10-05 22:19:02 +01:00
6f8b75c041
Make IRQ vectors right-sized. CXXRTL was spending > 1/3rd of its time in the CSR update.
2022-10-05 22:11:53 +01:00
0915cc2834
Doh
2022-09-08 15:11:24 +01:00
f48177c644
Tie off debug LEDs in ULX3S top level
2022-09-05 00:37:44 +01:00
9eb8590858
Add generate to avoid elaborating internals of PMP/triggers with 0 PMP regions or triggers.
2022-09-05 00:36:41 +01:00
18c64bd633
Add no_rw_check attribute to regfile memory to avoid recent Yosys area regression
2022-09-04 23:56:14 +01:00
787a7ec372
Fix bad preprocessor conditional in ECP5 JTAG DTM
2022-09-04 23:48:58 +01:00
c594ec42e9
Change style of IRQ register tie-offs as Yosys was not able to trim them for iCE40 synthesis.
2022-09-04 23:43:24 +01:00
3ae843034d
Example soc: connect up power signals and always-on clock. Set more parameters explicitly.
2022-09-04 23:42:48 +01:00
624d39669d
Fix up new asserts in hazard3_power_ctrl. Add power signals to formal TBs.
2022-08-29 19:20:09 +01:00
1c2249dbef
Typo
2022-08-29 16:25:12 +01:00
6abd93eb49
Oops, masked the wakeup-on-halt request path when I masked IRQs on WFI state.
2022-08-29 16:15:19 +01:00
099f0467fb
Clean up remnants of the 'wfi_is_nop' thing that seemed like a good idea at the time
2022-08-29 15:56:57 +01:00
da4097ecd8
Delay pwrup_req->pwrup_ack in tb
2022-08-29 14:55:11 +01:00
954bae5cf1
Implement block/unblock instructions, and fix questionable partial masking of sleep signals on exceptions. Add simple test for self-block/unblock with loopback in tb.
2022-08-29 14:52:01 +01:00
b352d3878d
Update docs for new power control extension
2022-08-28 19:54:55 +01:00
2ae2463b97
First stab at adding wake/sleep state machine
2022-08-28 19:50:04 +01:00
ce93c45e69
Add docs section for custom extensions
2022-08-28 15:50:26 +01:00
bf38d93d33
Remove references to AHB-Lite, describe buses as (a subset of) AHB5
2022-08-28 14:15:20 +01:00
7d18a21734
Editing
2022-08-27 20:49:55 +01:00
d56e217a40
Work on docs. Document config options, expand the intro, move instruction timings and pseudocode to appendices.
2022-08-27 20:13:21 +01:00
a79c857d82
Bump riscv-tests: enable hardware instruction breakpoints in hardware tests
2022-08-27 17:05:02 +01:00
9a60f06c43
Fix trigger enable condition
2022-08-23 01:05:46 +01:00
fef6d80fd4
tcontrol.mpte is not supposed to change on trap exit, unlike mstatus.mpie
2022-08-23 00:19:56 +01:00
9e11c0e5a8
Fix tdata1.dmode being writable from M-mode
2022-08-23 00:08:17 +01:00
04f138ae0e
Fix mcontrol.execute not being writable. Enable hardware breakpoint debug tests: Hwpb1/2, JumpHBreak, TriggerExecuteInstant
2022-08-23 00:05:30 +01:00
49c2edeff8
Avoid reserved keyword
2022-08-22 10:26:20 +01:00
53902a901b
Fix bad rdata width for tdata1 (which also caused the trigger type to appear as legacy SiFive, oops)
2022-08-22 09:47:19 +01:00
f9dafa3867
Update readme
2022-08-22 09:25:37 +01:00
b90d12efed
CSRs: avoid use of wdata_update in rdata for meicontext, which the SMT2 backend sees as a loop.
...
There is no functional loop here since this is an acyclic path between different bits of the rdata vector, but it makes sense that this would confuse tools that don't bitblast all the vectors.
2022-08-22 09:18:57 +01:00
ba775563d5
Fix suspicious gating of jump request
2022-08-22 09:10:12 +01:00
Luke Wren