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-rw-r--r--arch/arm/boot/compressed/head.S26
1 files changed, 12 insertions, 14 deletions
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index 2e04ec5b5446..14d1995106c2 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -165,6 +165,16 @@
orr \res, \res, \tmp1, lsl #24
.endm
+ .macro be32tocpu, val, tmp
+#ifndef __ARMEB__
+ /* convert to little endian */
+ eor \tmp, \val, \val, ror #16
+ bic \tmp, \tmp, #0x00ff0000
+ mov \val, \val, ror #8
+ eor \val, \val, \tmp, lsr #8
+#endif
+ .endm
+
.section ".start", "ax"
/*
* sort out different calling conventions
@@ -345,13 +355,7 @@ restart: adr r0, LC1
/* Get the initial DTB size */
ldr r5, [r6, #4]
-#ifndef __ARMEB__
- /* convert to little endian */
- eor r1, r5, r5, ror #16
- bic r1, r1, #0x00ff0000
- mov r5, r5, ror #8
- eor r5, r5, r1, lsr #8
-#endif
+ be32tocpu r5, r1
dbgadtb r6, r5
/* 50% DTB growth should be good enough */
add r5, r5, r5, lsr #1
@@ -403,13 +407,7 @@ restart: adr r0, LC1
/* Get the current DTB size */
ldr r5, [r6, #4]
-#ifndef __ARMEB__
- /* convert r5 (dtb size) to little endian */
- eor r1, r5, r5, ror #16
- bic r1, r1, #0x00ff0000
- mov r5, r5, ror #8
- eor r5, r5, r1, lsr #8
-#endif
+ be32tocpu r5, r1
/* preserve 64-bit alignment */
add r5, r5, #7