1b0e205f87
Fix bad AMO asserts. Fix hwdata instability during stalled AMO write dphase, which meant AMOs were fundamentally broken following yesterday's datapath origami
2021-12-18 14:51:46 +00:00
d1b5f83b7a
Beef up the ULX3S SoC again now that atomics aren't so disastrous for timing
2021-12-18 02:41:50 +00:00
6b8d4913ee
Remove unnecessary mux of mw_result -> m_result
2021-12-18 01:34:25 +00:00
79fec3a2f5
Overload mw_result register for capturing AMO read data. Save some LCs.
2021-12-18 01:24:26 +00:00
28b53ef7b5
Delete the AMO ALU. Save around 80 LCs vs original implementation, maybe enables some more savings.
2021-12-18 00:35:13 +00:00
7485269ddf
Use the branch target adder for load/store addresses. Preparing for AMO ALU deletion
2021-12-17 22:36:40 +00:00
a35739baf1
Fix AMO failing to loop on global monitor write fail
2021-12-17 17:04:22 +00:00
a81d129961
Add exclusives monitor to testbench
2021-12-17 17:03:35 +00:00
5ab60422ad
Add minimal multicore launch code
2021-12-17 01:24:11 +00:00
01d9617f9c
Add multicore tb integration file
2021-12-17 00:41:23 +00:00
207566660d
tb: handle both ports identically. Preparing for dual core
2021-12-17 00:04:00 +00:00
1fa0d4d442
Create LICENSE
2021-12-13 23:40:14 +00:00
b0d28447ab
New license headers: DWTFPL -> Apache 2.0
2021-12-13 23:23:40 +00:00
f1cda26bcc
Oops, try a little harder this time to ensure local monitor is cleared by sc.w errors _always_, even if lined up with trap entry stalls etc
2021-12-12 23:32:01 +00:00
25b44d04cf
Add more properties wrt AMO. Fix awful bugs in interaction between AMOs and prior lr/sc, prior load/store exception, or IRQ which is asserted then deasserted. Fix sc with HRESP=1 HEXOKAY=1 not clearing the local monitor (not a bug, but unfriendly).
2021-12-12 23:24:25 +00:00
1697192c62
Fix cycle timing docs for sc.w: 2 cycles if next instruction is RAW-dependent.
2021-12-12 20:50:26 +00:00
88fea7acfa
Fix lockup on misaligned AMO. Add tests for misaligned/faulting AMOs.
2021-12-12 18:28:23 +00:00
719c21fec3
Add IRQ tests. Disable waves by default in runtests
2021-12-12 15:53:04 +00:00
9fb2af800f
Allow IRQs to be set/cleared by sw in tb. Add soft IRQ test
2021-12-12 14:58:50 +00:00
a232833d81
Add CSR writable test
2021-12-12 14:23:34 +00:00
8a003dbbed
Make mcycle/minstret inhibited by default
2021-12-12 13:55:33 +00:00
2bbc3637a2
Simplify CSR update logic. Showed promise in block synth but no difference to example soc. Still cleaner RTL.
2021-12-12 00:38:30 +00:00
7da67a0600
Similarly for minstret
2021-12-11 22:25:12 +00:00
1b722b5f27
Add mcycle test, fix incorrect description of mcycle in docs
2021-12-11 21:21:31 +00:00
93eca19aeb
Add test for lr/sc RAW stalls
2021-12-11 19:16:41 +00:00
763a5cd364
Add test for readability of all implemented CSRs
2021-12-11 17:50:12 +00:00
7b1da32af1
Move expected_output into tests inline
2021-12-11 16:58:25 +00:00
9460b3cd04
Add load/store and lr/sc bus fault tests. Fix lr.w not clearing local monitor when HRESP=1 HEXOKAY=1.
2021-12-11 15:52:34 +00:00
f64f44f7af
Add test for identification CSRs vs expected values
2021-12-11 13:26:59 +00:00
4066e941ef
Fix sim cmdline in bitmanip-random tests
2021-12-11 13:13:21 +00:00
3fe0d92d41
Add load/store alignment testcases
2021-12-11 12:53:37 +00:00
c90727b05a
Remove padding after vector table in init.S
2021-12-11 12:22:23 +00:00
6076eba61f
Add run_all script under riscv-compliance
2021-12-11 12:08:53 +00:00
52d58fdee4
Add keep wires for debug port on bus compliance tb
2021-12-11 12:06:10 +00:00
6edfbfae8b
Add ebreak size/alignment test
2021-12-11 11:17:24 +00:00
cccc32fe16
Update instructions for running hello world under debugger
2021-12-11 10:25:29 +00:00
abe1769929
Add instruction access fault testcase
2021-12-11 09:54:00 +00:00
933f2cd65c
Fix remaining fallout from tb args change
2021-12-11 09:53:39 +00:00
6d55cd2d55
Consolidate openocd and bin-load testbenches
2021-12-11 09:46:38 +00:00
fadb9601de
Illegal instruction test
2021-12-10 00:11:18 +00:00
3d2c912b4f
Add test script to make it easier to add software testcases
2021-12-09 22:25:18 +00:00
7d2fa6a049
Fix width warnings in A instruction decode, add don't-care to bus rdata picking logic
2021-12-09 06:26:31 +00:00
116e34df49
Fix commented out frontend properties which relied on non-constant past reset values
2021-12-07 20:24:29 +00:00
449348f459
Fix bug where an IRQ can fire during load/store dphase, followed by dphase bus exception.
...
Result was that the exception would sample the IRQ vector PC rather than the load/store instruction PC.
Fix by fencing off on in-flight dphases before asserting the IRQ. This adds a cycle of jitter
to IRQs, but is required for correct operation without adding a full exception-gathering pipeline.
2021-12-07 19:24:53 +00:00
dbc331dbb4
Add exclusives bus properties
2021-12-07 05:47:25 +00:00
6ef3503ef5
Add A bit to MISA, update docs
2021-12-07 05:10:20 +00:00
93be227d8a
Add (currently failing) trap entry property. Fails when an IRQ arrives during a load/store data phase which subsequently excepts.
2021-12-06 20:12:23 +00:00
ed22d502fd
Fix bus stall getting stuck high when a bus fault exception isn't immediately accepted by the frontend
2021-12-06 19:28:21 +00:00
50d3d5d3b3
Maintain AMO IRQ holdoff when transitioning from data phase to error phase, to prevent error possibly being flushed
2021-12-06 19:27:20 +00:00
29c5c8ca7f
Fix AMO stall falling through when write data phase should proceed to error phase
2021-12-06 18:28:56 +00:00
Luke Wren