Peter Rugg
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c8e4a64128
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Add sentries
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2020-06-29 23:29:08 +01:00 |
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jon
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a51ddf17be
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Use the request ID in the response to the DMA interface.
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2020-06-20 12:15:49 +01:00 |
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jon
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4b3f97cb6a
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More correct version of select function.
Also the beginnings of a select function for writes which is not yet
used.
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2020-06-09 12:33:43 +01:00 |
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jon
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122e98b0c7
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Attempt to provide correct alignment for MMIO requests in flits returned
to bus.
This does not yet attempt to fix writes which might likely also need
fixing.
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2020-06-08 19:03:12 +01:00 |
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jon
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9ec9b34376
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Don't overwrite earlier exception in Execute.
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2020-06-06 09:42:11 +01:00 |
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Peter Rugg
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9aeb8f1ea9
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Fix CSR read immediate case
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2020-06-02 20:50:56 +01:00 |
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jon
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bb3eddccf2
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Implement cap_mode switch for legacy loads and stores, as the mechanism
for decoding has changed and was not setting the new flag.
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2020-06-02 19:00:28 +01:00 |
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Peter Rugg
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675de23dc2
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Fix TestSubset top check the wrong way around
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2020-06-01 20:23:42 +01:00 |
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Peter Rugg
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b7c73d4422
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Link offset in JAL
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2020-06-01 18:57:51 +01:00 |
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Peter Rugg
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1725cdda8f
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Fix bug where immediate discarded too early in Scr case
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2020-06-01 15:12:30 +01:00 |
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Peter Rugg
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f7deb7349b
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Fix writeback when reading and writing CSR/SCR together
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2020-06-01 15:04:59 +01:00 |
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Peter Rugg
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16eac986ef
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Fix EPC/MTVEC updates ignoring old value
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2020-06-01 12:17:14 +01:00 |
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Peter Rugg
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a49d3d2b6b
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Add ASR restrictions
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2020-05-28 23:25:33 +01:00 |
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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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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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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
|
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 |
|
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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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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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
|
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
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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).
|
2020-05-01 17:26:41 +01:00 |
|
jon
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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
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90d9d7cbc7
|
Move back to considering the instruction width when checking PCC.
|
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
|
2020-04-30 14:07:37 +01:00 |
|
jon
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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 |
|
jon
|
ab6b8966db
|
Bounds-check legacy jalr and br correctly.
|
2020-04-28 11:47:09 +01:00 |
|
jon
|
5693af05e5
|
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
|
2251457840
|
Implement target bounds-check for CJALR.
|
2020-04-23 17:54:18 +01:00 |
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