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| author |   Jeff Garzik <jgarzik@pobox.com> | 2005-07-30 18:14:15 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-07-30 18:14:15 -0400 |
| commit | a670fcb43f01a67ef56176afc76e5d43d128b25c (patch) | |
| tree | 09c9411c78a33ff980e9ea871bc7686e7589abbf /arch/arm/lib/bitops.h | |
| parent | Merge upstream 2.6.13-rc3 into ieee80211 branch of netdev-2.6. (diff) | |
| parent | [PATCH] agp: restore APBASE after setting APSIZE (diff) | |
| download | linux-dev-a670fcb43f01a67ef56176afc76e5d43d128b25c.tar.xz linux-dev-a670fcb43f01a67ef56176afc76e5d43d128b25c.zip | |
/spare/repo/netdev-2.6 branch 'master'
Diffstat (limited to 'arch/arm/lib/bitops.h')
| -rw-r--r-- | arch/arm/lib/bitops.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/lib/bitops.h b/arch/arm/lib/bitops.h index 4a83ab6cd565..2036ff15bda9 100644 --- a/arch/arm/lib/bitops.h +++ b/arch/arm/lib/bitops.h @@ -1,3 +1,33 @@ +#if __LINUX_ARM_ARCH__ >= 6 + .macro bitop, instr + mov r2, #1 + and r3, r0, #7 @ Get bit offset + add r1, r1, r0, lsr #3 @ Get byte offset + mov r3, r2, lsl r3 +1: ldrexb r2, [r1] + \instr r2, r2, r3 + strexb r0, r2, [r1] + cmp r0, #0 + bne 1b + mov pc, lr + .endm + + .macro testop, instr, store + and r3, r0, #7 @ Get bit offset + mov r2, #1 + add r1, r1, r0, lsr #3 @ Get byte offset + mov r3, r2, lsl r3 @ create mask +1: ldrexb r2, [r1] + ands r0, r2, r3 @ save old value of bit + \instr r2, r2, r3 @ toggle bit + strexb ip, r2, [r1] + cmp ip, #0 + bne 1b + cmp r0, #0 + movne r0, #1 +2: mov pc, lr + .endm +#else .macro bitop, instr and r2, r0, #7 mov r3, #1 @@ -31,3 +61,4 @@ moveq r0, #0 mov pc, lr .endm +#endif |