riscv/rocket-chip
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Author SHA1 Message Date
Andrew Waterman
a7999d4525 don't flush I$ unless fence.i commits 
otherwise, we might not make forward progress.
 2012-01-26 20:37:09 -08:00
Andrew Waterman
32f5f420f3 Merge branch 'master' of github.com:ucb-bar/riscv-rocket 2012-01-26 20:12:42 -08:00
Andrew Waterman
41855a6d47 fix missing "otherwise" in PCR file 
this fixes timer interrupts for VLSI backend.
 2012-01-26 19:33:55 -08:00
Andrew Waterman
7172ddd050 don't flush pipeline after MFPCR 2012-01-24 18:40:08 -08:00
Andrew Waterman
97c379f1d7 made I$ associative 2012-01-24 16:51:30 -08:00
Henry Cook
aa3465699b LFSR now a util 2012-01-24 15:26:19 -08:00
Andrew Waterman
7f26fe2c44 make icache size parameterizable 2012-01-24 15:13:49 -08:00
Henry Cook
8229d65adf Associative cache passes asm tests and bmarks with power of 2 associativities (including 1) 2012-01-24 11:41:44 -08:00
Andrew Waterman
9e6b86fe85 Fix a nasty replay bug 
If a mispredicted branch was followed by an instruction dependent
on a load that missed in the cache, the mispredicted path would
be executed rather than the correct path. Fail.

Example broken code:

lw   x2, 0(x2)          # cache miss
beq  x3, x0, somewhere  # mispredicted branch
move x4, x2             # wrong-path instruction dependent on load miss
 2012-01-24 03:40:01 -08:00
Andrew Waterman
06fdf79dab fix long-latency writeback arbitration bug 2012-01-24 00:56:47 -08:00
Andrew Waterman
f1c355e3cd check pc/effective address sign extension 2012-01-24 00:15:17 -08:00
Andrew Waterman
a5a020f97b update chisel and remove SRAM_READ_LATENCY 2012-01-23 20:59:38 -08:00
Henry Cook
8766438bb9 Updated chisel removes ^^ from language. Removed from rocket source, updated jar. 2012-01-23 17:09:23 -08:00
Andrew Waterman
e7bf07d55e fix AMO replay bug 2012-01-23 15:35:53 -08:00
Andrew Waterman
d59bddfbf1 fix I$ miss replay bug 2012-01-21 20:42:13 -08:00
Andrew Waterman
31c56228e2 add missing "otherwise" 2012-01-21 20:13:15 -08:00
Henry Cook
97f0852b17 DM cache with assoc-aware subunits passes all asm and bmarks 2012-01-18 17:53:26 -08:00
Henry Cook
8623d58724 split into two caches, compiles 2012-01-18 17:09:35 -08:00
Henry Cook
29ed8eb31a More utils for nbdcache 2012-01-18 17:09:35 -08:00
Henry Cook
7e25749581 Groundwork for assoc cache implementation 2012-01-18 17:09:35 -08:00
Andrew Waterman
07f184df2f adhere to new chisel c naming convention 2012-01-18 15:23:21 -08:00
Henry Cook
1d76255dc1 new chisel version jar and find and replace INPUT and OUTPUT 2012-01-18 14:39:57 -08:00
Andrew Waterman
e4cf6391d7 fix i$ miss pathology and badvaddr bug 2012-01-17 23:47:35 -08:00
Andrew Waterman
0369b05deb move replays to writeback stage 2012-01-17 21:12:31 -08:00
Andrew Waterman
1c8f496811 fix fpga build 2012-01-13 20:04:11 -08:00
Andrew Waterman
addfe55735 add FPGA memory generator script 2012-01-13 18:19:08 -08:00
Andrew Waterman
acf3134e80 minor control logic cleanup 2012-01-12 14:19:18 -08:00
Andrew Waterman
4807d7222b use replay to handle I$ misses 
this eliminates a long path in the fetch stage
 2012-01-11 19:20:20 -08:00
Andrew Waterman
1a7bfd4350 remove icache req_rdy signal 2012-01-11 18:27:11 -08:00
Andrew Waterman
bcb55e581a remove host.start signal, use reset instead 2012-01-11 17:49:32 -08:00
Andrew Waterman
92dda102b6 slight control logic cleanup 2012-01-11 16:56:40 -08:00
Andrew Waterman
938b142d64 require writes to memory to be uninterrupted 2012-01-03 18:41:53 -08:00
Andrew Waterman
142dfc6e07 made tohost/fromhost 64 bits wide 2012-01-03 15:09:08 -08:00
Andrew Waterman
20aee36c96 move PCR writes to WB stage 2012-01-02 15:42:39 -08:00
Andrew Waterman
3045b33460 remove second RF write port 
load miss writebacks are treated like mul/div now.
 2012-01-02 02:51:30 -08:00
Andrew Waterman
ffe23a1ee8 fix WAW hazard handling 2012-01-02 00:25:11 -08:00
Andrew Waterman
eb657dd250 reduce superfluous replays 
we only replay after a cache miss if we mis-scheduled the use of a load.
 2012-01-01 21:28:38 -08:00
Andrew Waterman
efc623cc36 validate BTB address and use BTB for J/JAL/JR/JALR 
even if we weren't using the BTB for JR/JALR, we'd need to
flush the BTB on FENCE.I and on context switches, but
validating its result suffices instead.
 2012-01-01 17:04:14 -08:00
Andrew Waterman
2f8fcebea0 remove datapath register resets resets 2012-01-01 16:09:40 -08:00
Andrew Waterman
f9160c53cf fixes for correct verilog generation 2011-12-29 23:46:21 -08:00
Andrew Waterman
1028ff7d9b fix multiplier bug 2011-12-29 23:45:09 -08:00
Andrew Waterman
d65e1a2eee vlsi verilog compiles now but doesn't simulate 2011-12-20 22:08:27 -08:00
Andrew Waterman
38ea10a5f4 parameterized multiplier unrolling 2011-12-20 04:18:28 -08:00
Andrew Waterman
733fc8e65e booth multiplier 2011-12-20 03:49:07 -08:00
Andrew Waterman
b5a8b6dc73 fix divider for RV32 2011-12-19 16:57:53 -08:00
Andrew Waterman
bcceb08373 add dummy mul_rdy signal 2011-12-17 07:30:47 -08:00
Andrew Waterman
96c78829b4 improve ALU and fix revealed emulator bug 2011-12-17 07:20:32 -08:00
Andrew Waterman
82700cad72 fix multiplier for rv32 2011-12-17 07:20:00 -08:00
Andrew Waterman
a8d0cd95e6 hellacache now works 2011-12-17 03:26:11 -08:00
Andrew Waterman
56c4f44c2a hellacache returns! 
but AMOs are unimplemented.
 2011-12-12 06:49:39 -08:00