Cheri-research/Toooba
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8a07e18439cd8a4222c39d96bf1955e2ca86e7a3
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Author SHA1 Message Date
jon
8a07e18439 Do memory zeroing on reset when doing RVFI-DII. 
I couldn't quite use the implementation from Flute as the register was
too wide for verilator.
This one uses wide memories instead, which is way complicated, but I
think it works.  The width of the memory can be traded off for reset
speed.  The width at the moment is 8192 bits, which seems to be fast
enough.
 2020-05-28 10:55:46 +01:00
Peter Rugg
57129f6383 Some minor cleanup of decode 2020-05-21 15:51:03 +01:00
Peter Rugg
2702f40b5e Initial implementation of CSetBoundsExact 2020-05-21 15:50:37 +01:00
Peter Rugg
791e862377 Initial (slow) implementation of CTestSubset 2020-05-21 15:49:25 +01:00
jon
0a84227f93 Implement DDC offset. 2020-05-20 18:03:14 +01:00
jon
d00ade6c9d Fix new-write-folding-in function to copy original tags where there are 
no byte-enables set.
 2020-05-20 13:31:09 +01:00
Peter Rugg
072c188f92 Initial implementation of CCSeal 2020-05-19 23:05:18 +01:00
Peter Rugg
61b97e090d Fix CFromPtr common case 2020-05-19 23:04:53 +01:00
Peter Rugg
372e4e4dfb Bump BSV-RVFI-DII 2020-05-19 16:36:59 +01:00
Peter Rugg
e74220afc4 Implement CFromPtr 2020-05-19 02:37:53 +01:00
Peter Rugg
cd4d296a0c Initial attempt to allow reads/writes to xtvec, xepc via xtcc, xepcc 2020-05-14 17:22:39 +01:00
jon
82498cd963 Only unseal next_pc after exception checks have been made. 2020-05-13 12:48:23 +01:00
Peter Rugg
7c0dad18d6 Deal with separate kinds of sealing more explicitly 2020-05-13 12:02:03 +01:00
jon
a6fd7acf3e Temporary resolution of signExtension behaviour for getType. 
Peter intends to use getKind from an updated version of cheri-cap-lib.
 2020-05-12 17:25:44 +01:00
jon
0f0d1a983b Remove references to ScrFile which were mysteriously still here. 2020-05-12 17:24:50 +01:00
Peter Rugg
c65e89f6c1 Also enforce privilege checks for SCR reads 2020-05-12 13:28:40 +01:00
jon
854151978e Fix byte-enable merging tag logic in the cache (with help from 
Alexandre).
Also adjust priority in CCall exceptions.
 2020-05-12 12:25:45 +01:00
Peter Rugg
26919154db Merge branch 'pdr32-wip' into CHERI 2020-05-12 00:19:36 +01:00
Peter Rugg
8f4c6fbcce Decode CSpecialRW 0 as AUIPCC 2020-05-11 23:52:43 +01:00
Peter Rugg
f0bcd2ccd1 Don't write on CSpecialRW from R0 2020-05-11 23:52:04 +01:00
Peter Rugg
ec9f19dc26 Disable assert since normal instructions can read SCRs 2020-05-11 22:39:12 +01:00
Peter Rugg
20eb1129b1 Complete PCC checks 2020-05-11 17:25:21 +01:00
Peter Rugg
0ee9c65f3a Forward cap-only instructions to the ALU 2020-05-11 17:24:43 +01:00
Peter Rugg
461ca6a703 Merge branch 'CHERI' into pdr32-wip 2020-05-11 14:08:42 +01:00
jon
6e00bd627b Implement x0 default value in the memory pipe. 2020-05-11 12:21:57 +01:00
jon
cf39ec8368 Move to semantics suggested by Jess where we throw the exception on the 
type of the code capability (src1, hopefully?) if the type is reserved.
 2020-05-11 11:39:10 +01:00
jon
e3b532089d Bounds-check the target of CCall. 
Also handle more invalid decodings of explicit capability instructions
correctly.
 2020-05-08 12:15:35 +01:00
jon
9631a9db4b Rework exceptions in the memory pipeline to reconverge with the original 
exception flow.  This solves some issues with exceptions not being known
in some parts of the pipeline due to bypassing them.
 2020-05-07 19:35:00 +01:00
Peter Rugg
f5ec436d19 Bump cheri-cap-lib 2020-05-07 16:34:09 +01:00
Peter Rugg
27947f4df7 Refactoring around SCRs 2020-05-07 16:19:26 +01:00
jon
77c7a6f3c0 Use the existing functions for casting. 2020-05-07 13:20:11 +01:00
jon
e3664c2bfd Do sign extension properly on loads. 2020-05-07 12:17:14 +01:00
jon
9c0130a200 Support for permissions and bounds checks for memory operations, taking 
the cap mode into account.
 2020-05-06 18:48:44 +01:00
jon
cbb0d859c7 Feed capability checks and bounds checks into the memory pipe and back 
into the reorder buffer.
 2020-05-05 18:28:28 +01:00
jon
500811430b Initial support for decoding Capability Memory instructions. 2020-05-05 12:23:10 +01:00
jon
21d1207e6b The beginnings of an implementation of LQ and SQ. 
Also a bug-fix to unseal nextPCC for control flow instructions, which
should only affect CCall (which was leaving PCC sealed).
 2020-05-01 17:26:41 +01:00
jon
0177c2cd6e Use the bounds of PCC to check legacy control flow instructions rather 
than the bounds of the newPCC after C(Set/Inc)Offset, which may have
become unrepresentable.
 2020-05-01 12:17:20 +01:00
jon
90d9d7cbc7 Move back to considering the instruction width when checking PCC. 2020-04-30 15:33:01 +01:00
Alexandre Joannou
b70498e00a Try new types to hold capabilities 2020-04-30 14:07:37 +01:00
jon
0b68498940 Fix interface with special capability register file trap handling. 
Call the correct trap function, and report the correct privilege level.
 2020-04-30 12:00:55 +01:00
Marno van der Maas
6dff23f30a Added BLUESPECDIR to read me 2020-04-30 11:56:13 +01:00
jon
44199a841b Only check the bounds of nextPc if the branch is taken... 2020-04-29 18:34:02 +01:00
jon
1439fe98c7 Fix 2 bugs. 
Restore from sepc on sret.
To "inclusive" bounds check on Jumps and Branches.
 2020-04-29 13:42:23 +01:00
jon
d3e0908785 Check PCC bounds in rename. 2020-04-28 19:08:07 +01:00
Marno van der Maas
68d4afa8c9 Added submodule update to read me 2020-04-28 14:58:35 +01:00
Marno van der Maas
1cf28c0d1d Added link to verilator build instructions 2020-04-28 14:41:01 +01:00
jon
ab6b8966db Bounds-check legacy jalr and br correctly. 2020-04-28 11:47:09 +01:00
jon
f63d55d4e5 Fix bug; consistently treat mepc as the offset of mepcc. 
Also remove PCC from the SCR file.
 2020-04-27 17:36:02 +01:00
Alexandre Joannou
e5b7ba6b13 Fixes to build with cap PCC for non RVFI-DII case 2020-04-27 16:48:34 +01:00
jon
d24750f0ec Bump the capability library. 2020-04-27 15:56:48 +01:00