| 34,10 → 34,13 |
|---|
| |
| #include <arch/mm/tlb.h> |
| #include <mm/tlb.h> |
| #include <mm/as.h> |
| #include <mm/asid.h> |
| #include <arch/mm/frame.h> |
| #include <arch/mm/page.h> |
| #include <arch/mm/mmu.h> |
| #include <mm/asid.h> |
| #include <arch/interrupt.h> |
| #include <arch.h> |
| #include <print.h> |
| #include <arch/types.h> |
| #include <typedefs.h> |
| 47,6 → 50,9 |
|---|
| #include <arch/asm.h> |
| #include <symtab.h> |
| |
| static void dtlb_pte_copy(pte_t *t); |
| static void do_fast_data_access_mmu_miss_fault(istate_t *istate, const char *str); |
| |
| char *context_encoding[] = { |
| "Primary", |
| "Secondary", |
| 99,37 → 105,60 |
|---|
| dtlb_data_in_write(data.value); |
| } |
| |
| void dtlb_pte_copy(pte_t *t) |
| { |
| } |
| |
| /** ITLB miss handler. */ |
| void fast_instruction_access_mmu_miss(void) |
| void fast_instruction_access_mmu_miss(int n, istate_t *istate) |
| { |
| panic("%s\n", __FUNCTION__); |
| } |
| |
| /** DTLB miss handler. */ |
| void fast_data_access_mmu_miss(void) |
| /** DTLB miss handler. |
| * |
| * Note that some faults (e.g. kernel faults) were already resolved |
| * by the low-level, assembly language part of the fast_data_access_mmu_miss |
| * handler. |
| */ |
| void fast_data_access_mmu_miss(int n, istate_t *istate) |
| { |
| tlb_tag_access_reg_t tag; |
| uintptr_t tpc; |
| char *tpc_str; |
| uintptr_t va; |
| pte_t *t; |
| |
| tag.value = dtlb_tag_access_read(); |
| if (tag.context != ASID_KERNEL || tag.vpn == 0) { |
| tpc = tpc_read(); |
| tpc_str = get_symtab_entry(tpc); |
| va = tag.vpn * PAGE_SIZE; |
| if (tag.context == ASID_KERNEL) { |
| if (!tag.vpn) { |
| /* NULL access in kernel */ |
| do_fast_data_access_mmu_miss_fault(istate, __FUNCTION__); |
| } |
| do_fast_data_access_mmu_miss_fault(istate, "Unexpected kernel page fault."); |
| } |
| |
| printf("Faulting page: %p, ASID=%d\n", tag.vpn * PAGE_SIZE, tag.context); |
| printf("TPC=%p, (%s)\n", tpc, tpc_str ? tpc_str : "?"); |
| panic("%s\n", __FUNCTION__); |
| page_table_lock(AS, true); |
| t = page_mapping_find(AS, va); |
| if (t) { |
| /* |
| * The mapping was found in the software page hash table. |
| * Insert it into DTLB. |
| */ |
| dtlb_pte_copy(t); |
| 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_READ, istate) == AS_PF_FAULT) { |
| do_fast_data_access_mmu_miss_fault(istate, __FUNCTION__); |
| } |
| } |
| |
| /* |
| * Identity map piece of faulting kernel address space. |
| */ |
| dtlb_insert_mapping(tag.vpn * PAGE_SIZE, tag.vpn * FRAME_SIZE, PAGESIZE_8K, false, true); |
| } |
| |
| /** DTLB protection fault handler. */ |
| void fast_data_access_protection(void) |
| void fast_data_access_protection(int n, istate_t *istate) |
| { |
| panic("%s\n", __FUNCTION__); |
| } |
| 161,6 → 190,20 |
|---|
| |
| } |
| |
| void do_fast_data_access_mmu_miss_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) |
| { |