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ARM: 9037/1: uncompress: Add OF_DT_MAGIC macro 

The DTB magic marker is stored as a 32-bit big-endian value, and thus
depends on the CPU's endianness.  Add a macro to define this value in
native endianness, to reduce #ifdef clutter and (future) 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>
This commit is contained in:
Geert Uytterhoeven 2020-12-04 10:39:10 +01:00 committed by Russell King
parent 1ecec38547
commit 551b39efc6
1 changed files with 7 additions and 5 deletions
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12
arch/arm/boot/compressed/head.S
View File

@ -11,6 +11,12 @@
#include "efi-header.S"
#ifdef __ARMEB__
#define OF_DT_MAGIC 0xd00dfeed
#else
#define OF_DT_MAGIC 0xedfe0dd0
#endif
AR_CLASS( .arch armv7-a )
M_CLASS( .arch armv7-m )
@ -335,11 +341,7 @@ restart: adr r0, LC1
*/
ldr lr, [r6, #0]
#ifndef __ARMEB__
ldr r1, =0xedfe0dd0 @ sig is 0xd00dfeed big endian
#else
ldr r1, =0xd00dfeed
#endif
ldr r1, =OF_DT_MAGIC
cmp lr, r1
bne dtb_check_done @ not found