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Diffstat (limited to 'arch/arm/lib/bitops.h')
-rw-r--r--arch/arm/lib/bitops.h12
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/arm/lib/bitops.h b/arch/arm/lib/bitops.h
index 6976e60e47cb..64a988c1ad44 100644
--- a/arch/arm/lib/bitops.h
+++ b/arch/arm/lib/bitops.h
@@ -1,4 +1,6 @@
1#if __LINUX_ARM_ARCH__ >= 6 1#include <linux/config.h>
2
3#if __LINUX_ARM_ARCH__ >= 6 && defined(CONFIG_CPU_MPCORE)
2 .macro bitop, instr 4 .macro bitop, instr
3 mov r2, #1 5 mov r2, #1
4 and r3, r0, #7 @ Get bit offset 6 and r3, r0, #7 @ Get bit offset
@@ -7,7 +9,7 @@
71: ldrexb r2, [r1] 91: ldrexb r2, [r1]
8 \instr r2, r2, r3 10 \instr r2, r2, r3
9 strexb r0, r2, [r1] 11 strexb r0, r2, [r1]
10 cmpne r0, #0 12 cmp r0, #0
11 bne 1b 13 bne 1b
12 mov pc, lr 14 mov pc, lr
13 .endm 15 .endm
@@ -19,9 +21,9 @@
19 mov r3, r2, lsl r3 @ create mask 21 mov r3, r2, lsl r3 @ create mask
201: ldrexb r2, [r1] 221: ldrexb r2, [r1]
21 ands r0, r2, r3 @ save old value of bit 23 ands r0, r2, r3 @ save old value of bit
22 \instr ip, r2, r3 @ toggle bit 24 \instr r2, r2, r3 @ toggle bit
23 strexb r2, ip, [r1] 25 strexb ip, r2, [r1]
24 cmp r2, #0 26 cmp ip, #0
25 bne 1b 27 bne 1b
26 cmp r0, #0 28 cmp r0, #0
27 movne r0, #1 29 movne r0, #1