diff options
| author | Julius Werner <jwerner@chromium.org> | 2013-12-13 12:59:57 -0800 |
|---|---|---|
| committer | Isaac Christensen <isaac.christensen@se-eng.com> | 2014-09-22 18:47:42 +0200 |
| commit | d65e214d666269d0bd20d88ba2bc83349810c668 (patch) | |
| tree | 4c7db158bc03fddf7bc4b373ee382cd1a2635979 /src/arch/arm/memcpy.S | |
| parent | 64b9ca9d4eb5eccdea86d967220c67b503a4519b (diff) | |
arm: Update mem* functions to newer versions
The memcpy/memset/memmove assembly implementations have been taken from
U-Boot, which originally got them from Linux. I turns out that they are
actually not that bad, but they could use an update. This patch pulls in
the current Linux upstream versions of those files, removing some old
U-Boot cruft such as checking whether the two pointers in a memcpy() are
equal (really now?) or side-stepping the R8 register because it was used
for special purposes. It also returns to the good old Linux
ENTRY/ENDPROC macros since we have them now anyway, and straightens out
the W() macro in preparation for unified thumb support.
Change-Id: I138af269b423bef0a237759ac29f1ee58ca206a0
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/182179
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
(cherry picked from commit 777127997bde5785b21d422d0b6eb04c4328b478)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6918
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Diffstat (limited to 'src/arch/arm/memcpy.S')
| -rw-r--r-- | src/arch/arm/memcpy.S | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/src/arch/arm/memcpy.S b/src/arch/arm/memcpy.S index 921fc2a6bc..b8f857bb56 100644 --- a/src/arch/arm/memcpy.S +++ b/src/arch/arm/memcpy.S @@ -10,9 +10,8 @@ * published by the Free Software Foundation. */ -#include <assembler.h> - -#define W(instr) instr +#include <arch/asm.h> +#include "asmlib.h" #define LDR1W_SHIFT 0 #define STR1W_SHIFT 0 @@ -57,12 +56,7 @@ /* Prototype: void *memcpy(void *dest, const void *src, size_t n); */ -.type memcpy, function -.globl memcpy -memcpy: - - cmp r0, r1 - moveq pc, lr +ENTRY(memcpy) enter r4, lr @@ -242,3 +236,4 @@ memcpy: 17: forward_copy_shift pull=16 push=16 18: forward_copy_shift pull=24 push=8 +ENDPROC(memcpy) |