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| author | Giacomo Gabrielli <giacomo.gabrielli@arm.com> | 2017-07-07 14:13:11 +0100 |
|---|---|---|
| committer | Giacomo Gabrielli <giacomo.gabrielli@arm.com> | 2019-05-11 12:48:58 +0000 |
| commit | c58cb8c9dbeef377da180f1fdaaa1c0eadf85550 (patch) | |
| tree | 7591abeb888d8c8e645332749bcaea627628f9bf /src/cpu/exec_context.hh | |
| parent | d0e4cdc9c36466a3dbef8c9f9f509cce8f1a6c34 (diff) | |
| download | gem5-c58cb8c9dbeef377da180f1fdaaa1c0eadf85550.tar.xz | |
cpu,mem: Add support for partial loads/stores and wide mem. accesses
This changeset adds support for partial (or masked) loads/stores, i.e.
loads/stores that can disable accesses to individual bytes within the
target address range. In addition, this changeset extends the code to
crack memory accesses across most CPU models (TimingSimpleCPU still
TBD), so that arbitrarily wide memory accesses are supported. These
changes are required for supporting ISAs with wide vectors.
Additional authors:
- Gabor Dozsa <gabor.dozsa@arm.com>
- Tiago Muck <tiago.muck@arm.com>
Change-Id: Ibad33541c258ad72925c0b1d5abc3e5e8bf92d92
Signed-off-by: Giacomo Gabrielli <giacomo.gabrielli@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/13518
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
Diffstat (limited to 'src/cpu/exec_context.hh')
| -rw-r--r-- | src/cpu/exec_context.hh | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/cpu/exec_context.hh b/src/cpu/exec_context.hh index 4cad9e3e1..b294387e2 100644 --- a/src/cpu/exec_context.hh +++ b/src/cpu/exec_context.hh @@ -235,7 +235,8 @@ class ExecContext { * should never be called). */ virtual Fault readMem(Addr addr, uint8_t *data, unsigned int size, - Request::Flags flags) + Request::Flags flags, + const std::vector<bool>& byteEnable = std::vector<bool>()) { panic("ExecContext::readMem() should be overridden\n"); } @@ -248,7 +249,8 @@ class ExecContext { * should never be called). */ virtual Fault initiateMemRead(Addr addr, unsigned int size, - Request::Flags flags) + Request::Flags flags, + const std::vector<bool>& byteEnable = std::vector<bool>()) { panic("ExecContext::initiateMemRead() should be overridden\n"); } @@ -258,7 +260,9 @@ class ExecContext { * For timing-mode contexts, initiate a timing memory write operation. */ virtual Fault writeMem(uint8_t *data, unsigned int size, Addr addr, - Request::Flags flags, uint64_t *res) = 0; + Request::Flags flags, uint64_t *res, + const std::vector<bool>& byteEnable = + std::vector<bool>()) = 0; /** * For atomic-mode contexts, perform an atomic AMO (a.k.a., Atomic |