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| author | Andrew Waterman <waterman@eecs.berkeley.edu> | 2013-12-17 10:18:47 -0800 |
|---|---|---|
| committer | Andrew Waterman <waterman@eecs.berkeley.edu> | 2013-12-17 10:18:47 -0800 |
| commit | 7f457c47b339cc7c79f56bb277ed8ed989e88ae1 (patch) | |
| tree | 4a3cc949c4a5631699c69443b1a24049ca01fbb4 /riscv/mmu.cc | |
| parent | e85cb99c5e042ebce78f64213677a48ee7ba0491 (diff) | |
| download | spike-7f457c47b339cc7c79f56bb277ed8ed989e88ae1.zip spike-7f457c47b339cc7c79f56bb277ed8ed989e88ae1.tar.gz spike-7f457c47b339cc7c79f56bb277ed8ed989e88ae1.tar.bz2 | |
Speed things up quite a bit
Diffstat (limited to 'riscv/mmu.cc')
| -rw-r--r-- | riscv/mmu.cc | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/riscv/mmu.cc b/riscv/mmu.cc index 96884d6..f8efd5a 100644 --- a/riscv/mmu.cc +++ b/riscv/mmu.cc @@ -16,7 +16,8 @@ mmu_t::~mmu_t() void mmu_t::flush_icache() { - memset(icache_tag, -1, sizeof(icache_tag)); + for (size_t i = 0; i < ICACHE_ENTRIES; i++) + icache[i].tag = -1; } void mmu_t::flush_tlb() @@ -28,7 +29,7 @@ void mmu_t::flush_tlb() flush_icache(); } -reg_t mmu_t::refill_tlb(reg_t addr, reg_t bytes, bool store, bool fetch) +void* mmu_t::refill_tlb(reg_t addr, reg_t bytes, bool store, bool fetch) { reg_t idx = (addr >> PGSHIFT) % TLB_ENTRIES; reg_t expected_tag = addr & ~(PGSIZE-1); @@ -62,10 +63,10 @@ reg_t mmu_t::refill_tlb(reg_t addr, reg_t bytes, bool store, bool fetch) tlb_load_tag[idx] = (pte_perm & PTE_UR) ? expected_tag : -1; tlb_store_tag[idx] = (pte_perm & PTE_UW) ? expected_tag : -1; tlb_insn_tag[idx] = (pte_perm & PTE_UX) ? expected_tag : -1; - tlb_data[idx] = pgbase; + tlb_data[idx] = mem + pgbase - (addr & ~(PGSIZE-1)); } - return paddr; + return mem + paddr; } pte_t mmu_t::walk(reg_t addr) |