[SPARC64]: Initial sun4v TLB miss handling infrastructure.

Things are a little tricky because, unlike sun4u, we have
to:

1) do a hypervisor trap to do the TLB load.
2) do the TSB lookup calculations by hand

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 2 deletions

diff --git a/arch/sparc64/kernel/ktlb.S b/arch/sparc64/kernel/ktlb.S
index c1335432124e..2e55084a0c12 100644
--- a/arch/sparc64/kernel/ktlb.S
+++ b/arch/sparc64/kernel/ktlb.S
@@ -16,12 +16,16 @@
         .text
         .align          32
 
-        .globl          kvmap_itlb
 kvmap_itlb:
         /* g6: TAG TARGET */
         mov             TLB_TAG_ACCESS, %g4
         ldxa            [%g4] ASI_IMMU, %g4
 
+        /* sun4v_itlb_miss branches here with the missing virtual
+         * address already loaded into %g4
+         */
+kvmap_itlb_4v:
+
 kvmap_itlb_nonlinear:
         /* Catch kernel NULL pointer calls.  */
         sethi           %hi(PAGE_SIZE), %g5
@@ -94,11 +98,15 @@ kvmap_dtlb_obp:
          nop
 
         .align          32
-        .globl          kvmap_dtlb
 kvmap_dtlb:
         /* %g6: TAG TARGET */
         mov             TLB_TAG_ACCESS, %g4
         ldxa            [%g4] ASI_DMMU, %g4
+
+        /* sun4v_dtlb_miss branches here with the missing virtual
+         * address already loaded into %g4
+         */
+kvmap_dtlb_4v:
         brgez,pn        %g4, kvmap_dtlb_nonlinear
          nop