ARM: cache-v7: consolidate initialisation of cache level index
Both v7_flush_cache_louis and v7_flush_dcache_all both begin the
flush_levels loop with r10 initialised to zero. In each case, this
is done immediately prior to entering the loop. Branch to this
instruction in v7_flush_dcache_all from v7_flush_cache_louis and
eliminate the unnecessary initialisation in v7_flush_cache_louis.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/cache-v7.S b/arch/arm/mm/cache-v7.S
index d062f8c..5b5d0c0 100644
--- a/arch/arm/mm/cache-v7.S
+++ b/arch/arm/mm/cache-v7.S
@@ -103,8 +103,7 @@
moveqs r3, #1 << 1 @ fix LoUIS value (and set flags state to 'ne')
#endif
reteq lr @ return if level == 0
- mov r10, #0 @ r10 (starting level) = 0
- b flush_levels @ start flushing cache levels
+ b start_flush_levels @ start flushing cache levels
ENDPROC(v7_flush_dcache_louis)
/*
@@ -122,6 +121,7 @@
mov r3, r0, lsr #23 @ move LoC into position
ands r3, r3, #7 << 1 @ extract LoC*2 from clidr
beq finished @ if loc is 0, then no need to clean
+start_flush_levels:
mov r10, #0 @ start clean at cache level 0
flush_levels:
add r2, r10, r10, lsr #1 @ work out 3x current cache level