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[SPARC64]: Sanitize %pstate writes for sun4v.

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If we're just switching between different alternate global
sets, nop it out on sun4v.  Also, get rid of all of the
alternate global save/restore in the OBP CIF trampoline code.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-02-05 22:27:28 -08:00
parent 314981ac71
commit 45fec05f80
7 changed files with 88 additions and 206 deletions
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18
arch/sparc64/mm/ultra.S
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@@ -444,8 +444,15 @@ xcall_flush_tlb_kernel_range: /* 22 insns */
*/
.globl xcall_sync_tick
xcall_sync_tick:
rdpr %pstate, %g2
661: rdpr %pstate, %g2
wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate
.section .gl_2insn_patch, "ax"
.word 661b
nop
nop
.previous
rdpr %pil, %g2
wrpr %g0, 15, %pil
sethi %hi(109f), %g7
@@ -468,8 +475,15 @@ xcall_sync_tick:
*/
.globl xcall_report_regs
xcall_report_regs:
rdpr %pstate, %g2
661: rdpr %pstate, %g2
wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate
.section .gl_2insn_patch, "ax"
.word 661b
nop
nop
.previous
rdpr %pil, %g2
wrpr %g0, 15, %pil
sethi %hi(109f), %g7