forked from luck/tmp_suning_uos_patched
348738afe5
atomic24 support was used to semaphores in the past - but is no longer used. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
45 lines
683 B
ArmAsm
45 lines
683 B
ArmAsm
/* 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:
|