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| author | Jerry Zhao <jerryz123@berkeley.edu> | 2022-12-27 11:41:27 -0800 |
|---|---|---|
| committer | Jerry Zhao <jerryz123@berkeley.edu> | 2022-12-27 16:17:50 -0800 |
| commit | 20e7f5363b6a383b4baa01f3c8a9b29fc47549a4 (patch) | |
| tree | a8789fdecba029cb77804c4d9473a4c8ae475857 /riscv/execute.cc | |
| parent | 591e6229238f914c5304df1b726e5b0d35d10f68 (diff) | |
| download | riscv-isa-sim-20e7f5363b6a383b4baa01f3c8a9b29fc47549a4.zip riscv-isa-sim-20e7f5363b6a383b4baa01f3c8a9b29fc47549a4.tar.gz riscv-isa-sim-20e7f5363b6a383b4baa01f3c8a9b29fc47549a4.tar.bz2 | |
Prevent processor_t from retiring instructions after a WFI
Diffstat (limited to 'riscv/execute.cc')
| -rw-r--r-- | riscv/execute.cc | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/riscv/execute.cc b/riscv/execute.cc index d36ccf6..c922602 100644 --- a/riscv/execute.cc +++ b/riscv/execute.cc @@ -242,6 +242,10 @@ void processor_t::step(size_t n) try { take_pending_interrupt(); + if (unlikely(in_wfi)) { + // No unmasked pending interrupt, so remain in wfi + throw wait_for_interrupt_t(); + } if (unlikely(slow_path())) { @@ -321,6 +325,7 @@ void processor_t::step(size_t n) // allows us to switch to other threads only once per idle loop in case // there is activity. n = ++instret; + in_wfi = true; } state.minstret->bump(instret); |