atomic_32.S
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/* atomic.S: Move this stuff here for better ICACHE hit rates.
*
* Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu)
*/
#include <asm/ptrace.h>
#include <asm/psr.h>
.text
.align 4
.globl __atomic_begin
__atomic_begin:
#ifndef CONFIG_SMP
.globl ___xchg32_sun4c
___xchg32_sun4c:
rd %psr, %g3
andcc %g3, PSR_PIL, %g0
bne 1f
nop
wr %g3, PSR_PIL, %psr
nop; nop; nop
1:
andcc %g3, PSR_PIL, %g0
ld [%g1], %g7
bne 1f
st %g2, [%g1]
wr %g3, 0x0, %psr
nop; nop; nop
1:
mov %g7, %g2
jmpl %o7 + 8, %g0
mov %g4, %o7
.globl ___xchg32_sun4md
___xchg32_sun4md:
swap [%g1], %g2
jmpl %o7 + 8, %g0
mov %g4, %o7
#endif
.globl __atomic_end
__atomic_end: