X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=arch%2Farm64%2Fmm%2Fproc-macros.S;h=984edcda1850f1be420f92be7666b36c687cc476;hb=9ba733e2628196c5f211875122c8fc6de108c19e;hp=d69dffffaa8993bc7260c1df035b92c3b3867b48;hpb=34f6d2c9d12a97271d55c7b204443b2da9e6c29e;p=firefly-linux-kernel-4.4.55.git

diff --git a/arch/arm64/mm/proc-macros.S b/arch/arm64/mm/proc-macros.S
index d69dffffaa89..984edcda1850 100644
--- a/arch/arm64/mm/proc-macros.S
+++ b/arch/arm64/mm/proc-macros.S
@@ -74,3 +74,25 @@
 	msr	pmuserenr_el0, xzr		// Disable PMU access from EL0
 9000:
 	.endm
+
+/*
+ * Macro to perform a data cache maintenance for the interval
+ * [kaddr, kaddr + size)
+ *
+ * 	op:		operation passed to dc instruction
+ * 	domain:		domain used in dsb instruciton
+ * 	kaddr:		starting virtual address of the region
+ * 	size:		size of the region
+ * 	Corrupts: 	kaddr, size, tmp1, tmp2
+ */
+	.macro dcache_by_line_op op, domain, kaddr, size, tmp1, tmp2
+	dcache_line_size \tmp1, \tmp2
+	add	\size, \kaddr, \size
+	sub	\tmp2, \tmp1, #1
+	bic	\kaddr, \kaddr, \tmp2
+9998:	dc	\op, \kaddr
+	add	\kaddr, \kaddr, \tmp1
+	cmp	\kaddr, \size
+	b.lo	9998b
+	dsb	\domain
+	.endm