WebSVN – HelenOS – Diff – /branches/sparc/kernel/arch/sparc64/src/mm/tlb.c

 #include <arch/asm.h>
 #include <symtab.h>
 static void dtlb_pte_copy(pte_t *t, bool ro);
 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_mmu_miss_fault(istate_t *istate, tlb_tag_access_reg_t tag, const char *str);
-static void do_fast_data_access_protection_fault(istate_t *istate, const char *str);
+static void do_fast_data_access_protection_fault(istate_t *istate, tlb_tag_access_reg_t tag, const char *str);
 char *context_encoding[] = {
     "Primary",
     "Secondary",
     "Nucleus",
     tlb_tag_access_reg_t tag;
     uintptr_t va;
     pte_t *t;
     tag.value = dtlb_tag_access_read();
-    va = tag.vpn * PAGE_SIZE;
+    va = tag.vpn << PAGE_WIDTH;
     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, tag, __FUNCTION__);
+        }
-        do_fast_data_access_mmu_miss_fault(istate, "Unexpected kernel page fault.");
+        do_fast_data_access_mmu_miss_fault(istate, tag, "Unexpected kernel page fault.");
+    }
     page_table_lock(AS, true);
     t = page_mapping_find(AS, va);
     if (t) {
         /*
          * 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__);
+            do_fast_data_access_mmu_miss_fault(istate, tag, __FUNCTION__);
+        }
+    }
+}
 /** DTLB protection fault handler. */
     tlb_tag_access_reg_t tag;
     uintptr_t va;
     pte_t *t;
     tag.value = dtlb_tag_access_read();
-    va = tag.vpn * PAGE_SIZE;
+    va = tag.vpn << PAGE_WIDTH;
     page_table_lock(AS, true);
     t = page_mapping_find(AS, va);
     if (t && PTE_WRITABLE(t)) {
         /*
         /*
          * 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__);
+            do_fast_data_access_protection_fault(istate, tag, __FUNCTION__);
+        }
+    }
+}
 /** Print contents of both TLBs. */
     printf("TPC=%p, (%s)\n", istate->tpc, tpc_str);
     panic("%s\n", str);
+}
-void do_fast_data_access_mmu_miss_fault(istate_t *istate, const char *str)
+void do_fast_data_access_mmu_miss_fault(istate_t *istate, tlb_tag_access_reg_t tag, 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;
+    va = tag.vpn << PAGE_WIDTH;
     printf("Faulting page: %p, ASID=%d\n", va, tag.context);
     printf("TPC=%p, (%s)\n", istate->tpc, tpc_str);
     panic("%s\n", str);
+}
-void do_fast_data_access_protection_fault(istate_t *istate, const char *str)
+void do_fast_data_access_protection_fault(istate_t *istate, tlb_tag_access_reg_t tag, 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;
+    va = tag.vpn << PAGE_WIDTH;
     printf("Faulting page: %p, ASID=%d\n", va, tag.context);
     printf("TPC=%p, (%s)\n", istate->tpc, tpc_str);
     panic("%s\n", str);
+}
+ *
  * @param asid Address Space ID.
  */
 void tlb_invalidate_asid(asid_t asid)
+{
-    tlb_context_reg_t sc_save, ctx;
+    tlb_context_reg_t pc_save, ctx;
+    /* switch to nucleus because we are mapped by the primary context */
+    nucleus_enter();
-    ctx.v = sc_save.v = mmu_secondary_context_read();
+    ctx.v = pc_save.v = mmu_primary_context_read();
     ctx.context = asid;
-    mmu_secondary_context_write(ctx.v);
+    mmu_primary_context_write(ctx.v);
+    itlb_demap(TLB_DEMAP_CONTEXT, TLB_DEMAP_PRIMARY, 0);
+    dtlb_demap(TLB_DEMAP_CONTEXT, TLB_DEMAP_PRIMARY, 0);
-    itlb_demap(TLB_DEMAP_CONTEXT, TLB_DEMAP_SECONDARY, 0);
-    dtlb_demap(TLB_DEMAP_CONTEXT, TLB_DEMAP_SECONDARY, 0);
+    mmu_primary_context_write(pc_save.v);
-    mmu_secondary_context_write(sc_save.v);
+    nucleus_leave();
+}
 /** Invalidate all ITLB and DTLB entries for specified page range in specified address space.
+ *
  * @param asid Address Space ID.
  * @param cnt Number of ITLB and DTLB entries to invalidate.
  */
 void tlb_invalidate_pages(asid_t asid, uintptr_t page, count_t cnt)
+{
     int i;
-    tlb_context_reg_t sc_save, ctx;
+    tlb_context_reg_t pc_save, ctx;
+    /* switch to nucleus because we are mapped by the primary context */
+    nucleus_enter();
-    ctx.v = sc_save.v = mmu_secondary_context_read();
+    ctx.v = pc_save.v = mmu_primary_context_read();
     ctx.context = asid;
-    mmu_secondary_context_write(ctx.v);
+    mmu_primary_context_write(ctx.v);
     for (i = 0; i < cnt; i++) {
-        itlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_SECONDARY, page + i * PAGE_SIZE);
+        itlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_PRIMARY, page + i * PAGE_SIZE);
-        dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_SECONDARY, page + i * PAGE_SIZE);
+        dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_PRIMARY, page + i * PAGE_SIZE);
+    }
-    mmu_secondary_context_write(sc_save.v);
+    mmu_primary_context_write(pc_save.v);
+    nucleus_leave();
+}
 /** @}
  */

Subversion Repositories HelenOS

(root)/branches/sparc/kernel/arch/sparc64/src/mm/tlb.c @ 3742 – Rev 1864 → 1865