diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-01-02 22:41:36 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-02 22:41:36 +0100 |
| commit | 923a789b49c7269a0245d5af6afe486188d940df (patch) | |
| tree | c3f168427372e64f7467a794f313416da5086ba0 /arch/sparc/lib/rwsem_32.S | |
| parent | x86: mpparse.c fix style problems (diff) | |
| parent | Merge branch 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/ker... (diff) | |
| download | linux-923a789b49c7269a0245d5af6afe486188d940df.tar.xz linux-923a789b49c7269a0245d5af6afe486188d940df.zip | |
Merge branch 'linus' into x86/cleanups
Conflicts:
arch/x86/kernel/reboot.c
Diffstat (limited to 'arch/sparc/lib/rwsem_32.S')
| -rw-r--r-- | arch/sparc/lib/rwsem_32.S | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/arch/sparc/lib/rwsem_32.S b/arch/sparc/lib/rwsem_32.S new file mode 100644 index 000000000000..9675268e7fde --- /dev/null +++ b/arch/sparc/lib/rwsem_32.S @@ -0,0 +1,204 @@ +/* + * Assembly part of rw semaphores. + * + * Copyright (C) 1999 Jakub Jelinek (jakub@redhat.com) + */ + +#include <asm/ptrace.h> +#include <asm/psr.h> + + .section .sched.text, "ax" + .align 4 + + .globl ___down_read +___down_read: + rd %psr, %g3 + nop + nop + nop + or %g3, PSR_PIL, %g7 + wr %g7, 0, %psr + nop + nop + nop +#ifdef CONFIG_SMP +1: ldstub [%g1 + 4], %g7 + tst %g7 + bne 1b + ld [%g1], %g7 + sub %g7, 1, %g7 + st %g7, [%g1] + stb %g0, [%g1 + 4] +#else + ld [%g1], %g7 + sub %g7, 1, %g7 + st %g7, [%g1] +#endif + wr %g3, 0, %psr + add %g7, 1, %g7 + nop + nop + subcc %g7, 1, %g7 + bneg 3f + nop +2: jmpl %o7, %g0 + mov %g4, %o7 +3: save %sp, -64, %sp + mov %g1, %l1 + mov %g4, %l4 + bcs 4f + mov %g5, %l5 + call down_read_failed + mov %l1, %o0 + mov %l1, %g1 + mov %l4, %g4 + ba ___down_read + restore %l5, %g0, %g5 +4: call down_read_failed_biased + mov %l1, %o0 + mov %l1, %g1 + mov %l4, %g4 + ba 2b + restore %l5, %g0, %g5 + + .globl ___down_write +___down_write: + rd %psr, %g3 + nop + nop + nop + or %g3, PSR_PIL, %g7 + wr %g7, 0, %psr + sethi %hi(0x01000000), %g2 + nop + nop +#ifdef CONFIG_SMP +1: ldstub [%g1 + 4], %g7 + tst %g7 + bne 1b + ld [%g1], %g7 + sub %g7, %g2, %g7 + st %g7, [%g1] + stb %g0, [%g1 + 4] +#else + ld [%g1], %g7 + sub %g7, %g2, %g7 + st %g7, [%g1] +#endif + wr %g3, 0, %psr + add %g7, %g2, %g7 + nop + nop + subcc %g7, %g2, %g7 + bne 3f + nop +2: jmpl %o7, %g0 + mov %g4, %o7 +3: save %sp, -64, %sp + mov %g1, %l1 + mov %g4, %l4 + bcs 4f + mov %g5, %l5 + call down_write_failed + mov %l1, %o0 + mov %l1, %g1 + mov %l4, %g4 + ba ___down_write + restore %l5, %g0, %g5 +4: call down_write_failed_biased + mov %l1, %o0 + mov %l1, %g1 + mov %l4, %g4 + ba 2b + restore %l5, %g0, %g5 + + .text + .globl ___up_read +___up_read: + rd %psr, %g3 + nop + nop + nop + or %g3, PSR_PIL, %g7 + wr %g7, 0, %psr + nop + nop + nop +#ifdef CONFIG_SMP +1: ldstub [%g1 + 4], %g7 + tst %g7 + bne 1b + ld [%g1], %g7 + add %g7, 1, %g7 + st %g7, [%g1] + stb %g0, [%g1 + 4] +#else + ld [%g1], %g7 + add %g7, 1, %g7 + st %g7, [%g1] +#endif + wr %g3, 0, %psr + nop + nop + nop + cmp %g7, 0 + be 3f + nop +2: jmpl %o7, %g0 + mov %g4, %o7 +3: save %sp, -64, %sp + mov %g1, %l1 + mov %g4, %l4 + mov %g5, %l5 + clr %o1 + call __rwsem_wake + mov %l1, %o0 + mov %l1, %g1 + mov %l4, %g4 + ba 2b + restore %l5, %g0, %g5 + + .globl ___up_write +___up_write: + rd %psr, %g3 + nop + nop + nop + or %g3, PSR_PIL, %g7 + wr %g7, 0, %psr + sethi %hi(0x01000000), %g2 + nop + nop +#ifdef CONFIG_SMP +1: ldstub [%g1 + 4], %g7 + tst %g7 + bne 1b + ld [%g1], %g7 + add %g7, %g2, %g7 + st %g7, [%g1] + stb %g0, [%g1 + 4] +#else + ld [%g1], %g7 + add %g7, %g2, %g7 + st %g7, [%g1] +#endif + wr %g3, 0, %psr + sub %g7, %g2, %g7 + nop + nop + addcc %g7, %g2, %g7 + bcs 3f + nop +2: jmpl %o7, %g0 + mov %g4, %o7 +3: save %sp, -64, %sp + mov %g1, %l1 + mov %g4, %l4 + mov %g5, %l5 + mov %g7, %o1 + call __rwsem_wake + mov %l1, %o0 + mov %l1, %g1 + mov %l4, %g4 + ba 2b + restore %l5, %g0, %g5 |