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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-12-18 20:13:38 +0100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-12-21 04:21:16 +0100 |
| commit | f048aace29e007f2b642097e2da8231e0e9cce2d (patch) | |
| tree | 5e99b1d1d37817703132e97388994386a7bee8da /arch/powerpc/kernel/misc_32.S | |
| parent | powerpc/mm: Introduce MMU features (diff) | |
| download | linux-f048aace29e007f2b642097e2da8231e0e9cce2d.tar.xz linux-f048aace29e007f2b642097e2da8231e0e9cce2d.zip | |
powerpc/mm: Add SMP support to no-hash TLB handling
This commit moves the whole no-hash TLB handling out of line into a
new tlb_nohash.c file, and implements some basic SMP support using
IPIs and/or broadcast tlbivax instructions.
Note that I'm using local invalidations for D->I cache coherency.
At worst, if another processor is trying to execute the same and
has the old entry in its TLB, it will just take a fault and re-do
the TLB flush locally (it won't re-do the cache flush in any case).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/misc_32.S')
| -rw-r--r-- | arch/powerpc/kernel/misc_32.S | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S index 5c33bc14bd9f..2c2ab89f0b64 100644 --- a/arch/powerpc/kernel/misc_32.S +++ b/arch/powerpc/kernel/misc_32.S @@ -29,6 +29,7 @@ #include <asm/asm-offsets.h> #include <asm/processor.h> #include <asm/kexec.h> +#include <asm/bug.h> .text @@ -496,6 +497,14 @@ _GLOBAL(_tlbil_va) blr #endif /* CONFIG_FSL_BOOKE */ +/* + * Nobody implements this yet + */ +_GLOBAL(_tlbivax_bcast) +1: trap + EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,0; + blr + /* * Flush instruction cache. |