[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>
diff --git a/arch/sparc64/kernel/ktlb.S b/arch/sparc64/kernel/ktlb.S
index c133543..2e55084 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 @@
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
