Peter Rugg
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57129f6383
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Some minor cleanup of decode
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2020-05-21 15:51:03 +01:00 |
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Peter Rugg
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2702f40b5e
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Initial implementation of CSetBoundsExact
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2020-05-21 15:50:37 +01:00 |
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Peter Rugg
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791e862377
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Initial (slow) implementation of CTestSubset
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2020-05-21 15:49:25 +01:00 |
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jon
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0a84227f93
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Implement DDC offset.
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2020-05-20 18:03:14 +01:00 |
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jon
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d00ade6c9d
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Fix new-write-folding-in function to copy original tags where there are
no byte-enables set.
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2020-05-20 13:31:09 +01:00 |
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Peter Rugg
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072c188f92
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Initial implementation of CCSeal
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2020-05-19 23:05:18 +01:00 |
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Peter Rugg
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61b97e090d
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Fix CFromPtr common case
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2020-05-19 23:04:53 +01:00 |
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Peter Rugg
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e74220afc4
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Implement CFromPtr
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2020-05-19 02:37:53 +01:00 |
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Peter Rugg
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cd4d296a0c
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Initial attempt to allow reads/writes to xtvec, xepc via xtcc, xepcc
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2020-05-14 17:22:39 +01:00 |
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jon
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82498cd963
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Only unseal next_pc after exception checks have been made.
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2020-05-13 12:48:23 +01:00 |
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Peter Rugg
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7c0dad18d6
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Deal with separate kinds of sealing more explicitly
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2020-05-13 12:02:03 +01:00 |
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jon
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a6fd7acf3e
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Temporary resolution of signExtension behaviour for getType.
Peter intends to use getKind from an updated version of cheri-cap-lib.
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2020-05-12 17:25:44 +01:00 |
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jon
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0f0d1a983b
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Remove references to ScrFile which were mysteriously still here.
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2020-05-12 17:24:50 +01:00 |
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Peter Rugg
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c65e89f6c1
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Also enforce privilege checks for SCR reads
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2020-05-12 13:28:40 +01:00 |
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jon
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854151978e
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Fix byte-enable merging tag logic in the cache (with help from
Alexandre).
Also adjust priority in CCall exceptions.
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2020-05-12 12:25:45 +01:00 |
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Peter Rugg
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26919154db
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Merge branch 'pdr32-wip' into CHERI
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2020-05-12 00:19:36 +01:00 |
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Peter Rugg
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8f4c6fbcce
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Decode CSpecialRW 0 as AUIPCC
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2020-05-11 23:52:43 +01:00 |
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Peter Rugg
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f0bcd2ccd1
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Don't write on CSpecialRW from R0
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2020-05-11 23:52:04 +01:00 |
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Peter Rugg
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ec9f19dc26
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Disable assert since normal instructions can read SCRs
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2020-05-11 22:39:12 +01:00 |
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Peter Rugg
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20eb1129b1
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Complete PCC checks
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2020-05-11 17:25:21 +01:00 |
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Peter Rugg
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0ee9c65f3a
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Forward cap-only instructions to the ALU
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2020-05-11 17:24:43 +01:00 |
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Peter Rugg
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461ca6a703
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Merge branch 'CHERI' into pdr32-wip
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2020-05-11 14:08:42 +01:00 |
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jon
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6e00bd627b
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Implement x0 default value in the memory pipe.
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2020-05-11 12:21:57 +01:00 |
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jon
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cf39ec8368
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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.
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2020-05-11 11:39:10 +01:00 |
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jon
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e3b532089d
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Bounds-check the target of CCall.
Also handle more invalid decodings of explicit capability instructions
correctly.
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2020-05-08 12:15:35 +01:00 |
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jon
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9631a9db4b
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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.
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2020-05-07 19:35:00 +01:00 |
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Peter Rugg
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27947f4df7
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Refactoring around SCRs
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2020-05-07 16:19:26 +01:00 |
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jon
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77c7a6f3c0
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Use the existing functions for casting.
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2020-05-07 13:20:11 +01:00 |
|
jon
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e3664c2bfd
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Do sign extension properly on loads.
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2020-05-07 12:17:14 +01:00 |
|
jon
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9c0130a200
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Support for permissions and bounds checks for memory operations, taking
the cap mode into account.
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2020-05-06 18:48:44 +01:00 |
|
jon
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cbb0d859c7
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Feed capability checks and bounds checks into the memory pipe and back
into the reorder buffer.
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2020-05-05 18:28:28 +01:00 |
|
jon
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500811430b
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Initial support for decoding Capability Memory instructions.
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2020-05-05 12:23:10 +01:00 |
|
jon
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21d1207e6b
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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).
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2020-05-01 17:26:41 +01:00 |
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jon
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0177c2cd6e
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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.
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2020-05-01 12:17:20 +01:00 |
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jon
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90d9d7cbc7
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Move back to considering the instruction width when checking PCC.
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2020-04-30 15:33:01 +01:00 |
|
Alexandre Joannou
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b70498e00a
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Try new types to hold capabilities
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2020-04-30 14:07:37 +01:00 |
|
jon
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0b68498940
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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 |
|
jon
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44199a841b
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Only check the bounds of nextPc if the branch is taken...
|
2020-04-29 18:34:02 +01:00 |
|
jon
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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
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d3e0908785
|
Check PCC bounds in rename.
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2020-04-28 19:08:07 +01:00 |
|
jon
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ab6b8966db
|
Bounds-check legacy jalr and br correctly.
|
2020-04-28 11:47:09 +01:00 |
|
jon
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f63d55d4e5
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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
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e5b7ba6b13
|
Fixes to build with cap PCC for non RVFI-DII case
|
2020-04-27 16:48:34 +01:00 |
|
jon
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5693af05e5
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Changes to make PCC consistent.
Specifically, attach the bounds to PC all the way back into the branch predictors.
|
2020-04-27 15:13:36 +01:00 |
|
jon
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2251457840
|
Implement target bounds-check for CJALR.
|
2020-04-23 17:54:18 +01:00 |
|
Peter Rugg
|
3b30d2db36
|
Add BuildCap unsealing
|
2020-04-22 15:52:23 +01:00 |
|
Peter Rugg
|
8cc8f71cb9
|
Perform bounds check on requested length rather than rounded length.
This prevents issues with overflow in the top, and should be correct
based on the rounding used in the SetBounds function.
|
2020-04-22 14:27:11 +01:00 |
|
Peter Rugg
|
a89a606a6d
|
Factor out Opcodes and CSRs into separate files
|
2020-04-21 20:36:56 +01:00 |
|
Peter Rugg
|
3693326b62
|
Don't sign extend CSetBoundsImm immediate
|
2020-04-21 16:45:04 +01:00 |
|
Peter Rugg
|
8a4fa786dd
|
Add CToPtr special case
|
2020-04-21 13:52:33 +01:00 |
|