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authorKumar Gala <galak@kernel.crashing.org>2007-09-13 01:44:20 -0500
committerKumar Gala <galak@kernel.crashing.org>2007-09-14 08:53:30 -0500
commit5e14d21e3f28a4181dacff0336040e30942f4921 (patch)
treeebaa8217d5af80e15116960641a0bf87a8b5d717 /arch/powerpc/kernel/entry_32.S
parentd8f1324a5063c833862328ceafabc53ac3cc4f71 (diff)
downloadlinux-5e14d21e3f28a4181dacff0336040e30942f4921.tar.bz2
[POWERPC] Add cpu feature for SPE handling
Make it so that SPE support can be determined at runtime. This is similiar to how we handle AltiVec. This allows us to have SPE support built in and work on processors with and without SPE. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/entry_32.S')
-rw-r--r--arch/powerpc/kernel/entry_32.S4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 4074c0b31453..21d889e63e87 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -504,9 +504,11 @@ BEGIN_FTR_SECTION
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_SPE
+BEGIN_FTR_SECTION
oris r0,r0,MSR_SPE@h /* Disable SPE */
mfspr r12,SPRN_SPEFSCR /* save spefscr register value */
stw r12,THREAD+THREAD_SPEFSCR(r2)
+END_FTR_SECTION_IFSET(CPU_FTR_SPE)
#endif /* CONFIG_SPE */
and. r0,r0,r11 /* FP or altivec or SPE enabled? */
beq+ 1f
@@ -542,8 +544,10 @@ BEGIN_FTR_SECTION
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_SPE
+BEGIN_FTR_SECTION
lwz r0,THREAD+THREAD_SPEFSCR(r2)
mtspr SPRN_SPEFSCR,r0 /* restore SPEFSCR reg */
+END_FTR_SECTION_IFSET(CPU_FTR_SPE)
#endif /* CONFIG_SPE */
lwz r0,_CCR(r1)