X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=arch%2Farm%2Fmm%2Fproc-macros.S;h=b13150052a76bd6c5d6cc16b17a48d05978c16f8;hb=8d7c294cae6fd1474d88267810d1965f60a903af;hp=9e2c89eb2115bd644fc09d854d48ac7637fc3cad;hpb=3f8efdbe73a5bc96e006b2379a8c8d1d8ef52a9d;p=~andy%2Flinux

diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S
index 9e2c89eb211..b13150052a7 100644
--- 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