| 54,6 → 54,7 |
|---|
| static void itlb_pte_copy(pte_t *t); |
| static void do_fast_data_access_mmu_miss_fault(istate_t *istate, const char *str); |
| static void do_fast_instruction_access_mmu_miss_fault(istate_t *istate, const char *str); |
| static void do_fast_data_access_protection_fault(istate_t *istate, const char *str); |
| |
| char *context_encoding[] = { |
| "Primary", |
| 245,7 → 246,34 |
|---|
| /** DTLB protection fault handler. */ |
| void fast_data_access_protection(int n, istate_t *istate) |
| { |
| panic("%s\n", __FUNCTION__); |
| tlb_tag_access_reg_t tag; |
| uintptr_t va; |
| pte_t *t; |
| |
| tag.value = dtlb_tag_access_read(); |
| va = tag.vpn * PAGE_SIZE; |
| |
| page_table_lock(AS, true); |
| t = page_mapping_find(AS, va); |
| if (t && PTE_WRITABLE(t)) { |
| /* |
| * The mapping was found in the software page hash table and is writable. |
| * Demap the old mapping and insert an updated mapping into DTLB. |
| */ |
| t->a = true; |
| t->d = true; |
| dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_SECONDARY, va); |
| dtlb_pte_copy(t, false); |
| page_table_unlock(AS, true); |
| } else { |
| /* |
| * Forward the page fault to the address space page fault handler. |
| */ |
| page_table_unlock(AS, true); |
| if (as_page_fault(va, PF_ACCESS_WRITE, istate) == AS_PF_FAULT) { |
| do_fast_data_access_protection_fault(istate, __FUNCTION__); |
| } |
| } |
| } |
| |
| /** Print contents of both TLBs. */ |
| 297,6 → 325,20 |
|---|
| panic("%s\n", str); |
| } |
| |
| void do_fast_data_access_protection_fault(istate_t *istate, const char *str) |
| { |
| tlb_tag_access_reg_t tag; |
| uintptr_t va; |
| char *tpc_str = get_symtab_entry(istate->tpc); |
| |
| tag.value = dtlb_tag_access_read(); |
| va = tag.vpn * PAGE_SIZE; |
| |
| printf("Faulting page: %p, ASID=%d\n", va, tag.context); |
| printf("TPC=%p, (%s)\n", istate->tpc, tpc_str); |
| panic("%s\n", str); |
| } |
| |
| /** Invalidate all unlocked ITLB and DTLB entries. */ |
| void tlb_invalidate_all(void) |
| { |