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| author | Will Deacon <will.deacon@arm.com> | 2012-12-19 15:01:08 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-12-20 10:41:56 +0000 |
| commit | d056a699dd3d9366dd3b4d9996e7848209199cda (patch) | |
| tree | 158528d22412216c33487e57d40f76d64884a8be /arch | |
| parent | 7bf9b7bef881aac820bf1f2e9951a17b09bd7e04 (diff) | |
| download | linux-d056a699dd3d9366dd3b4d9996e7848209199cda.tar.gz | |
ARM: 7606/1: cache: flush to LoUU instead of LoUIS on uniprocessor CPUs
flush_cache_louis flushes the D-side caches to the point of unification inner-shareable. On uniprocessor CPUs, this is defined as zero and therefore no flushing will take place. Rather than invent a new interface for UP systems, instead use our SMP_ON_UP patching code to read the LoUU from the CLIDR instead. Cc: <stable@vger.kernel.org> Cc: Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com> Tested-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mm/cache-v7.S | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/arm/mm/cache-v7.S b/arch/arm/mm/cache-v7.S index cd956647c21a..7539ec275065 100644 --- a/arch/arm/mm/cache-v7.S +++ b/arch/arm/mm/cache-v7.S @@ -44,8 +44,10 @@ ENDPROC(v7_flush_icache_all) ENTRY(v7_flush_dcache_louis) dmb @ ensure ordering with previous memory accesses mrc p15, 1, r0, c0, c0, 1 @ read clidr, r0 = clidr - ands r3, r0, #0xe00000 @ extract LoUIS from clidr - mov r3, r3, lsr #20 @ r3 = LoUIS * 2 + ALT_SMP(ands r3, r0, #(7 << 21)) @ extract LoUIS from clidr + ALT_UP(ands r3, r0, #(7 << 27)) @ extract LoUU from clidr + ALT_SMP(mov r3, r3, lsr #20) @ r3 = LoUIS * 2 + ALT_UP(mov r3, r3, lsr #26) @ r3 = LoUU * 2 moveq pc, lr @ return if level == 0 mov r10, #0 @ r10 (starting level) = 0 b flush_levels @ start flushing cache levels |