diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2014-07-10 17:01:22 -0500 |
|---|---|---|
| committer | Marc Jones <marc.jones@se-eng.com> | 2015-03-04 20:04:18 +0100 |
| commit | 00263d0d8ee23bbe60ea359ea9cb33d551688980 (patch) | |
| tree | b3801ea3ffe2f1380267e4445b1ae9a2f5bffb9f /src/arch/arm64/memcpy.S | |
| parent | 0df877a65ac6563f1e46eea9e15e34a366d7105f (diff) | |
arm64: remove assembly code string functions
Inconsistent progress was observed running ramstage.
It was determined that the hand-coded assembly functions
were causing issues. Some of the comments seems suspect about
the hardware taking care of alignment. The prudent thing to do
is to use the C ones. Optimization can come later after maturity.
BUG=chrome-os-partner:29923
BRANCH=None
TEST=Built and booted to attempting to payload
Original-Change-Id: I4137adf9b36b638ed207e4efd57adaac64c6a6c1
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/207431
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit 2762e478c6b59dd30c59aa87a922d0f78c00c0c4)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: Id3196b0c2bf41a21db31f999ba437d118875a236
Reviewed-on: http://review.coreboot.org/8587
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/arch/arm64/memcpy.S')
| -rw-r--r-- | src/arch/arm64/memcpy.S | 52 |
1 files changed, 0 insertions, 52 deletions
diff --git a/src/arch/arm64/memcpy.S b/src/arch/arm64/memcpy.S deleted file mode 100644 index ccad4cf8cc..0000000000 --- a/src/arch/arm64/memcpy.S +++ /dev/null @@ -1,52 +0,0 @@ -/* - * Copyright (C) 2013 ARM Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <arch/asm.h> - -/* - * Copy a buffer from src to dest (alignment handled by the hardware) - * - * Parameters: - * x0 - dest - * x1 - src - * x2 - n - * Returns: - * x0 - dest - */ -ENTRY(memcpy) - mov x4, x0 - subs x2, x2, #8 - b.mi 2f -1: ldr x3, [x1], #8 - subs x2, x2, #8 - str x3, [x4], #8 - b.pl 1b -2: adds x2, x2, #4 - b.mi 3f - ldr w3, [x1], #4 - sub x2, x2, #4 - str w3, [x4], #4 -3: adds x2, x2, #2 - b.mi 4f - ldrh w3, [x1], #2 - sub x2, x2, #2 - strh w3, [x4], #2 -4: adds x2, x2, #1 - b.mi 5f - ldrb w3, [x1] - strb w3, [x4] -5: ret -ENDPROC(memcpy) |