diff options
| author | Michael Ellerman <michael@ellerman.id.au> | 2008-06-24 03:33:05 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-07-01 03:28:31 +0200 |
| commit | c230328def963373ec474056f372e1918692c3c8 (patch) | |
| tree | ea582324a2026e6a00daa38cfd52eaacea43c938 /arch/powerpc/kernel/entry_64.S | |
| parent | powerpc: Add self-tests of the feature fixup code (diff) | |
| download | linux-c230328def963373ec474056f372e1918692c3c8.tar.xz linux-c230328def963373ec474056f372e1918692c3c8.zip | |
powerpc: Use an alternative feature section in entry_64.S
Use an alternative feature section in _switch. There are three cases
handled here, either we don't have an SLB, in which case we jump over the
entire code section, or if we do we either do or don't have 1TB segments.
Boot tested on Power3, Power5 and Power5+.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index c0db5b769e55..6ca3044e2e32 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -383,16 +383,16 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) ld r8,KSP(r4) /* new stack pointer */ BEGIN_FTR_SECTION - b 2f -END_FTR_SECTION_IFCLR(CPU_FTR_SLB) -BEGIN_FTR_SECTION + BEGIN_FTR_SECTION_NESTED(95) clrrdi r6,r8,28 /* get its ESID */ clrrdi r9,r1,28 /* get current sp ESID */ -END_FTR_SECTION_IFCLR(CPU_FTR_1T_SEGMENT) -BEGIN_FTR_SECTION + FTR_SECTION_ELSE_NESTED(95) clrrdi r6,r8,40 /* get its 1T ESID */ clrrdi r9,r1,40 /* get current sp 1T ESID */ -END_FTR_SECTION_IFSET(CPU_FTR_1T_SEGMENT) + ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_1T_SEGMENT, 95) +FTR_SECTION_ELSE + b 2f +ALT_FTR_SECTION_END_IFSET(CPU_FTR_SLB) clrldi. r0,r6,2 /* is new ESID c00000000? */ cmpd cr1,r6,r9 /* or is new ESID the same as current ESID? */ cror eq,4*cr1+eq,eq |