diff options
Diffstat (limited to 'arch/arm/lib/bitops.h')
| -rw-r--r-- | arch/arm/lib/bitops.h | 38 |
1 files changed, 20 insertions, 18 deletions
diff --git a/arch/arm/lib/bitops.h b/arch/arm/lib/bitops.h index bd00551fb79..a9d9d152a75 100644 --- a/arch/arm/lib/bitops.h +++ b/arch/arm/lib/bitops.h @@ -1,15 +1,15 @@ - -#if __LINUX_ARM_ARCH__ >= 6 && defined(CONFIG_CPU_32v6K) +#if __LINUX_ARM_ARCH__ >= 6 .macro bitop, instr ands ip, r1, #3 strneb r1, [ip] @ assert word-aligned mov r2, #1 - and r3, r0, #7 @ Get bit offset - add r1, r1, r0, lsr #3 @ Get byte offset + and r3, r0, #31 @ Get bit offset + mov r0, r0, lsr #5 + add r1, r1, r0, lsl #2 @ Get word offset mov r3, r2, lsl r3 -1: ldrexb r2, [r1] +1: ldrex r2, [r1] \instr r2, r2, r3 - strexb r0, r2, [r1] + strex r0, r2, [r1] cmp r0, #0 bne 1b mov pc, lr @@ -18,15 +18,16 @@ .macro testop, instr, store ands ip, r1, #3 strneb r1, [ip] @ assert word-aligned - and r3, r0, #7 @ Get bit offset mov r2, #1 - add r1, r1, r0, lsr #3 @ Get byte offset + and r3, r0, #31 @ Get bit offset + mov r0, r0, lsr #5 + add r1, r1, r0, lsl #2 @ Get word offset mov r3, r2, lsl r3 @ create mask smp_dmb -1: ldrexb r2, [r1] +1: ldrex r2, [r1] ands r0, r2, r3 @ save old value of bit - \instr r2, r2, r3 @ toggle bit - strexb ip, r2, [r1] + \instr r2, r2, r3 @ toggle bit + strex ip, r2, [r1] cmp ip, #0 bne 1b smp_dmb @@ -38,13 +39,14 @@ .macro bitop, instr ands ip, r1, #3 strneb r1, [ip] @ assert word-aligned - and r2, r0, #7 + and r2, r0, #31 + mov r0, r0, lsr #5 mov r3, #1 mov r3, r3, lsl r2 save_and_disable_irqs ip - ldrb r2, [r1, r0, lsr #3] + ldr r2, [r1, r0, lsl #2] \instr r2, r2, r3 - strb r2, [r1, r0, lsr #3] + str r2, [r1, r0, lsl #2] restore_irqs ip mov pc, lr .endm @@ -60,11 +62,11 @@ .macro testop, instr, store ands ip, r1, #3 strneb r1, [ip] @ assert word-aligned - add r1, r1, r0, lsr #3 - and r3, r0, #7 - mov r0, #1 + and r3, r0, #31 + mov r0, r0, lsr #5 save_and_disable_irqs ip - ldrb r2, [r1] + ldr r2, [r1, r0, lsl #2]! + mov r0, #1 tst r2, r0, lsl r3 \instr r2, r2, r0, lsl r3 \store r2, [r1] |