diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2007-01-18 10:34:51 +1100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2007-01-18 10:34:51 +1100 |
| commit | 9cdf083f981b8d37b3212400a359368661385099 (patch) | |
| tree | aa15a6a08ad87e650dea40fb59b3180bef0d345b /arch/sparc/lib/bitops.S | |
| parent | e499e01d234a31d59679b7b1e1cf628d917ba49a (diff) | |
| parent | a8b3485287731978899ced11f24628c927890e78 (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/sparc/lib/bitops.S')
| -rw-r--r-- | arch/sparc/lib/bitops.S | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/arch/sparc/lib/bitops.S b/arch/sparc/lib/bitops.S deleted file mode 100644 index cb7fb66a40c8..000000000000 --- a/arch/sparc/lib/bitops.S +++ /dev/null @@ -1,109 +0,0 @@ -/* bitops.S: Low level assembler bit operations. - * - * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) - */ - -#include <asm/ptrace.h> -#include <asm/psr.h> - - .text - .align 4 - - .globl __bitops_begin -__bitops_begin: - - /* Take bits in %g2 and set them in word at %g1, - * return whether bits were set in original value - * in %g2. %g4 holds value to restore into %o7 - * in delay slot of jmpl return, %g3 + %g5 + %g7 can be - * used as temporaries and thus is considered clobbered - * by all callers. - */ - .globl ___set_bit -___set_bit: - rd %psr, %g3 - nop; nop; nop; - or %g3, PSR_PIL, %g5 - wr %g5, 0x0, %psr - nop; nop; nop -#ifdef CONFIG_SMP - set bitops_spinlock, %g5 -2: ldstub [%g5], %g7 ! Spin on the byte lock for SMP. - orcc %g7, 0x0, %g0 ! Did we get it? - bne 2b ! Nope... -#endif - ld [%g1], %g7 - or %g7, %g2, %g5 - and %g7, %g2, %g2 -#ifdef CONFIG_SMP - st %g5, [%g1] - set bitops_spinlock, %g5 - stb %g0, [%g5] -#else - st %g5, [%g1] -#endif - wr %g3, 0x0, %psr - nop; nop; nop - jmpl %o7, %g0 - mov %g4, %o7 - - /* Same as above, but clears the bits from %g2 instead. */ - .globl ___clear_bit -___clear_bit: - rd %psr, %g3 - nop; nop; nop - or %g3, PSR_PIL, %g5 - wr %g5, 0x0, %psr - nop; nop; nop -#ifdef CONFIG_SMP - set bitops_spinlock, %g5 -2: ldstub [%g5], %g7 ! Spin on the byte lock for SMP. - orcc %g7, 0x0, %g0 ! Did we get it? - bne 2b ! Nope... -#endif - ld [%g1], %g7 - andn %g7, %g2, %g5 - and %g7, %g2, %g2 -#ifdef CONFIG_SMP - st %g5, [%g1] - set bitops_spinlock, %g5 - stb %g0, [%g5] -#else - st %g5, [%g1] -#endif - wr %g3, 0x0, %psr - nop; nop; nop - jmpl %o7, %g0 - mov %g4, %o7 - - /* Same thing again, but this time toggles the bits from %g2. */ - .globl ___change_bit -___change_bit: - rd %psr, %g3 - nop; nop; nop - or %g3, PSR_PIL, %g5 - wr %g5, 0x0, %psr - nop; nop; nop -#ifdef CONFIG_SMP - set bitops_spinlock, %g5 -2: ldstub [%g5], %g7 ! Spin on the byte lock for SMP. - orcc %g7, 0x0, %g0 ! Did we get it? - bne 2b ! Nope... -#endif - ld [%g1], %g7 - xor %g7, %g2, %g5 - and %g7, %g2, %g2 -#ifdef CONFIG_SMP - st %g5, [%g1] - set bitops_spinlock, %g5 - stb %g0, [%g5] -#else - st %g5, [%g1] -#endif - wr %g3, 0x0, %psr - nop; nop; nop - jmpl %o7, %g0 - mov %g4, %o7 - - .globl __bitops_end -__bitops_end: |