478b8fecda
o Renamed files in sparc64 to <name>_64.S when identical to sparc32 files. o iomap.c were equal for sparc32 and sparc64 o adjusted sparc/Makefile now we have only one lib/ Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
139 lines
2.9 KiB
ArmAsm
139 lines
2.9 KiB
ArmAsm
/* atomic.S: These things are too big to do inline.
|
|
*
|
|
* Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
|
|
*/
|
|
|
|
#include <asm/asi.h>
|
|
#include <asm/backoff.h>
|
|
|
|
.text
|
|
|
|
/* Two versions of the atomic routines, one that
|
|
* does not return a value and does not perform
|
|
* memory barriers, and a second which returns
|
|
* a value and does the barriers.
|
|
*/
|
|
.globl atomic_add
|
|
.type atomic_add,#function
|
|
atomic_add: /* %o0 = increment, %o1 = atomic_ptr */
|
|
BACKOFF_SETUP(%o2)
|
|
1: lduw [%o1], %g1
|
|
add %g1, %o0, %g7
|
|
cas [%o1], %g1, %g7
|
|
cmp %g1, %g7
|
|
bne,pn %icc, 2f
|
|
nop
|
|
retl
|
|
nop
|
|
2: BACKOFF_SPIN(%o2, %o3, 1b)
|
|
.size atomic_add, .-atomic_add
|
|
|
|
.globl atomic_sub
|
|
.type atomic_sub,#function
|
|
atomic_sub: /* %o0 = decrement, %o1 = atomic_ptr */
|
|
BACKOFF_SETUP(%o2)
|
|
1: lduw [%o1], %g1
|
|
sub %g1, %o0, %g7
|
|
cas [%o1], %g1, %g7
|
|
cmp %g1, %g7
|
|
bne,pn %icc, 2f
|
|
nop
|
|
retl
|
|
nop
|
|
2: BACKOFF_SPIN(%o2, %o3, 1b)
|
|
.size atomic_sub, .-atomic_sub
|
|
|
|
.globl atomic_add_ret
|
|
.type atomic_add_ret,#function
|
|
atomic_add_ret: /* %o0 = increment, %o1 = atomic_ptr */
|
|
BACKOFF_SETUP(%o2)
|
|
1: lduw [%o1], %g1
|
|
add %g1, %o0, %g7
|
|
cas [%o1], %g1, %g7
|
|
cmp %g1, %g7
|
|
bne,pn %icc, 2f
|
|
add %g7, %o0, %g7
|
|
sra %g7, 0, %o0
|
|
retl
|
|
nop
|
|
2: BACKOFF_SPIN(%o2, %o3, 1b)
|
|
.size atomic_add_ret, .-atomic_add_ret
|
|
|
|
.globl atomic_sub_ret
|
|
.type atomic_sub_ret,#function
|
|
atomic_sub_ret: /* %o0 = decrement, %o1 = atomic_ptr */
|
|
BACKOFF_SETUP(%o2)
|
|
1: lduw [%o1], %g1
|
|
sub %g1, %o0, %g7
|
|
cas [%o1], %g1, %g7
|
|
cmp %g1, %g7
|
|
bne,pn %icc, 2f
|
|
sub %g7, %o0, %g7
|
|
sra %g7, 0, %o0
|
|
retl
|
|
nop
|
|
2: BACKOFF_SPIN(%o2, %o3, 1b)
|
|
.size atomic_sub_ret, .-atomic_sub_ret
|
|
|
|
.globl atomic64_add
|
|
.type atomic64_add,#function
|
|
atomic64_add: /* %o0 = increment, %o1 = atomic_ptr */
|
|
BACKOFF_SETUP(%o2)
|
|
1: ldx [%o1], %g1
|
|
add %g1, %o0, %g7
|
|
casx [%o1], %g1, %g7
|
|
cmp %g1, %g7
|
|
bne,pn %xcc, 2f
|
|
nop
|
|
retl
|
|
nop
|
|
2: BACKOFF_SPIN(%o2, %o3, 1b)
|
|
.size atomic64_add, .-atomic64_add
|
|
|
|
.globl atomic64_sub
|
|
.type atomic64_sub,#function
|
|
atomic64_sub: /* %o0 = decrement, %o1 = atomic_ptr */
|
|
BACKOFF_SETUP(%o2)
|
|
1: ldx [%o1], %g1
|
|
sub %g1, %o0, %g7
|
|
casx [%o1], %g1, %g7
|
|
cmp %g1, %g7
|
|
bne,pn %xcc, 2f
|
|
nop
|
|
retl
|
|
nop
|
|
2: BACKOFF_SPIN(%o2, %o3, 1b)
|
|
.size atomic64_sub, .-atomic64_sub
|
|
|
|
.globl atomic64_add_ret
|
|
.type atomic64_add_ret,#function
|
|
atomic64_add_ret: /* %o0 = increment, %o1 = atomic_ptr */
|
|
BACKOFF_SETUP(%o2)
|
|
1: ldx [%o1], %g1
|
|
add %g1, %o0, %g7
|
|
casx [%o1], %g1, %g7
|
|
cmp %g1, %g7
|
|
bne,pn %xcc, 2f
|
|
add %g7, %o0, %g7
|
|
mov %g7, %o0
|
|
retl
|
|
nop
|
|
2: BACKOFF_SPIN(%o2, %o3, 1b)
|
|
.size atomic64_add_ret, .-atomic64_add_ret
|
|
|
|
.globl atomic64_sub_ret
|
|
.type atomic64_sub_ret,#function
|
|
atomic64_sub_ret: /* %o0 = decrement, %o1 = atomic_ptr */
|
|
BACKOFF_SETUP(%o2)
|
|
1: ldx [%o1], %g1
|
|
sub %g1, %o0, %g7
|
|
casx [%o1], %g1, %g7
|
|
cmp %g1, %g7
|
|
bne,pn %xcc, 2f
|
|
sub %g7, %o0, %g7
|
|
mov %g7, %o0
|
|
retl
|
|
nop
|
|
2: BACKOFF_SPIN(%o2, %o3, 1b)
|
|
.size atomic64_sub_ret, .-atomic64_sub_ret
|