18269c0fd4
Identical named files renamed to <name>_32.S Refactored Makefile to prepare for unification. Linking order was altered slightly - but this is a lib.a file so it should not matter. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
205 lines
2.9 KiB
ArmAsm
205 lines
2.9 KiB
ArmAsm
/*
|
|
* 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
|