Changes in kernel/arch/sparc64/src/mm/sun4u/tlb.c [d70ebffe:59fb782] in mainline

File:

• kernel/arch/sparc64/src/mm/sun4u/tlb.c (modified) (5 diffs)

kernel/arch/sparc64/src/mm/sun4u/tlb.c

@@ -194 +194 @@
 
 /** ITLB miss handler. */
-void fast_instruction_access_mmu_miss(unsigned int tt, istate_t *istate)
+void fast_instruction_access_mmu_miss(sysarg_t unused, istate_t *istate)
 {
         size_t index = (istate->tpc >> MMU_PAGE_WIDTH) % MMU_PAGES_PER_PAGE;
@@ -224 +224 @@
  * low-level, assembly language part of the fast_data_access_mmu_miss handler.
  *
- * @param tt            Trap type.
+ * @param tag           Content of the TLB Tag Access register as it existed
+ *                      when the trap happened. This is to prevent confusion
+ *                      created by clobbered Tag Access register during a nested
+ *                      DTLB miss.
  * @param istate        Interrupted state saved on the stack.
  */
-void fast_data_access_mmu_miss(unsigned int tt, istate_t *istate)
-{
-        tlb_tag_access_reg_t tag;
+void fast_data_access_mmu_miss(tlb_tag_access_reg_t tag, istate_t *istate)
+{
         uintptr_t page_8k;
         uintptr_t page_16k;
@@ -236 +238 @@
         as_t *as = AS;
 
-        tag.value = istate->tlb_tag_access;
         page_8k = (uint64_t) tag.vpn << MMU_PAGE_WIDTH;
         page_16k = ALIGN_DOWN(page_8k, PAGE_SIZE);
@@ -275 +276 @@
 /** DTLB protection fault handler.
  *
- * @param tt            Trap type.
+ * @param tag           Content of the TLB Tag Access register as it existed
+ *                      when the trap happened. This is to prevent confusion
+ *                      created by clobbered Tag Access register during a nested
+ *                      DTLB miss.
  * @param istate        Interrupted state saved on the stack.
  */
-void fast_data_access_protection(unsigned int tt, istate_t *istate)
-{
-        tlb_tag_access_reg_t tag;
+void fast_data_access_protection(tlb_tag_access_reg_t tag, istate_t *istate)
+{
         uintptr_t page_16k;
         size_t index;
@@ -286 +289 @@
         as_t *as = AS;
 
-        tag.value = istate->tlb_tag_access;
         page_16k = ALIGN_DOWN((uint64_t) tag.vpn << MMU_PAGE_WIDTH, PAGE_SIZE);
         index = tag.vpn % MMU_PAGES_PER_PAGE;   /* 16K-page emulation */