mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 16:31:13 +00:00
58 lines
1.7 KiB
Diff
58 lines
1.7 KiB
Diff
|
From 43e769a2c40287d36c54438898a8b7d9358adba9 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
||
|
|
Date: Tue, 11 Jan 2022 10:48:30 +0000
|
||
|
|
Subject: [PATCH] arm: Fix custom rpi __memset32 and __memset64
|
||
|
|
|
||
|
|
See: https://github.com/raspberrypi/linux/issues/4798
|
||
|
|
|
||
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
||
|
|
---
|
||
|
|
arch/arm/lib/memset_rpi.S | 12 +++++++-----
|
||
|
|
1 file changed, 7 insertions(+), 5 deletions(-)
|
||
|
|
|
||
|
|
--- a/arch/arm/lib/memset_rpi.S
|
||
|
|
+++ b/arch/arm/lib/memset_rpi.S
|
||
|
|
@@ -53,8 +53,6 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBI
|
||
|
|
ENTRY(mmioset)
|
||
|
|
ENTRY(memset)
|
||
|
|
ENTRY(__memset)
|
||
|
|
-ENTRY(__memset32)
|
||
|
|
-ENTRY(__memset64)
|
||
|
|
|
||
|
|
S .req a1
|
||
|
|
DAT0 .req a2
|
||
|
|
@@ -64,10 +62,14 @@ ENTRY(__memset64)
|
||
|
|
DAT3 .req lr
|
||
|
|
|
||
|
|
orr DAT0, DAT0, DAT0, lsl #8
|
||
|
|
- push {S, lr}
|
||
|
|
orr DAT0, DAT0, DAT0, lsl #16
|
||
|
|
+
|
||
|
|
+ENTRY(__memset32)
|
||
|
|
mov DAT1, DAT0
|
||
|
|
|
||
|
|
+ENTRY(__memset64)
|
||
|
|
+ push {S, lr}
|
||
|
|
+
|
||
|
|
/* See if we're guaranteed to have at least one 16-byte aligned 16-byte write */
|
||
|
|
cmp N, #31
|
||
|
|
blo 170f
|
||
|
|
@@ -89,7 +91,7 @@ ENTRY(__memset64)
|
||
|
|
stmcsia S!, {DAT0, DAT1}
|
||
|
|
164: /* Delayed set up of DAT2 and DAT3 so we could use them as scratch registers above */
|
||
|
|
mov DAT2, DAT0
|
||
|
|
- mov DAT3, DAT0
|
||
|
|
+ mov DAT3, DAT1
|
||
|
|
/* Now the inner loop of 16-byte stores */
|
||
|
|
165: stmia S!, {DAT0, DAT1, DAT2, DAT3}
|
||
|
|
subs N, N, #16
|
||
|
|
@@ -105,7 +107,7 @@ ENTRY(__memset64)
|
||
|
|
|
||
|
|
170: /* Short case */
|
||
|
|
mov DAT2, DAT0
|
||
|
|
- mov DAT3, DAT0
|
||
|
|
+ mov DAT3, DAT1
|
||
|
|
tst S, #3
|
||
|
|
beq 174f
|
||
|
|
172: subs N, N, #1
|