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authorGeert Uytterhoeven <geert+renesas@glider.be>2020-12-04 10:37:47 +0100
committerRussell King <rmk+kernel@armlinux.org.uk>2020-12-21 11:19:20 +0000
commit0557ac83fd1a0a7cd6909665bad50006507115a0 (patch)
tree70093cdb8d9e72d3a05d0e5d1afa528bd334faa6 /arch/arm
parent27bde183b0d3b0e8e84c80db1864a5c7bd20b5e7 (diff)
ARM: 9035/1: uncompress: Add be32tocpu macro
DTB stores all values as 32-bit big-endian integers. Add a macro to convert such values to native CPU endianness, to reduce duplication. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm')
-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