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[SPARC64]: Initial sun4v TLB miss handling infrastructure.

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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>
This commit is contained in:
David S. Miller
2006-02-06 23:44:37 -08:00
parent 840aaef8db
commit d257d5da39
8 changed files with 349 additions and 18 deletions
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12
arch/sparc64/kernel/ktlb.S
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@ -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