1 files changed, 39 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/itlb_miss.S b/arch/sparc64/kernel/itlb_miss.S
new file mode 100644
index 000000000000..ad46e2024f4b
--- /dev/null
+++ b/arch/sparc64/kernel/itlb_miss.S
@@ -0,0 +1,39 @@
+/* ITLB ** ICACHE line 1: Context 0 check and TSB load  */
+        ldxa    [%g0] ASI_IMMU_TSB_8KB_PTR, %g1 ! Get TSB 8K pointer
+        ldxa    [%g0] ASI_IMMU, %g6             ! Get TAG TARGET
+        srlx    %g6, 48, %g5                    ! Get context
+        sllx    %g6, 22, %g6                    ! Zero out context
+        brz,pn  %g5, kvmap_itlb                 ! Context 0 processing
+         srlx   %g6, 22, %g6                    ! Delay slot
+        TSB_LOAD_QUAD(%g1, %g4)                 ! Load TSB entry
+        cmp     %g4, %g6                        ! Compare TAG
+
+/* ITLB ** ICACHE line 2: TSB compare and TLB load      */
+        bne,pn  %xcc, tsb_miss_itlb             ! Miss
+         mov    FAULT_CODE_ITLB, %g3
+        andcc   %g5, _PAGE_EXEC_4U, %g0         ! Executable?
+        be,pn   %xcc, tsb_do_fault
+         nop                                    ! Delay slot, fill me
+        stxa    %g5, [%g0] ASI_ITLB_DATA_IN     ! Load TLB
+        retry                                   ! Trap done
+        nop
+
+/* ITLB ** ICACHE line 3:                               */
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+
+/* ITLB ** ICACHE line 4:                               */
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop