Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild

[pandora-kernel.git] / arch / arm / mm / proc-macros.S

diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S
index 9e2c89e..b131500 100644 (file)
--- a/arch/arm/mm/proc-macros.S
+++ b/arch/arm/mm/proc-macros.S
@@ -59,3 +59,15 @@
        .word   \ucset
 #endif
        .endm
+
+/*
+ * cache_line_size - get the cache line size from the CSIDR register
+ * (available on ARMv7+). It assumes that the CSSR register was configured
+ * to access the L1 data cache CSIDR.
+ */
+       .macro  dcache_line_size, reg, tmp
+       mrc     p15, 1, \tmp, c0, c0, 0         @ read CSIDR
+       and     \tmp, \tmp, #7                  @ cache line size encoding
+       mov     \reg, #16                       @ size offset
+       mov     \reg, \reg, lsl \tmp            @ actual cache line size
+       .endm