android_kernel_motorola_sm6225/arch/sh/include/asm/cmpxchg-grb.h
Paul Mundt f15cbe6f1a sh: migrate to arch/sh/include/
This follows the sparc changes a439fe51a1.

Most of the moving about was done with Sam's directions at:

http://marc.info/?l=linux-sh&m=121724823706062&w=2

with subsequent hacking and fixups entirely my fault.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-07-29 08:09:44 +09:00

70 lines
2 KiB
C

#ifndef __ASM_SH_CMPXCHG_GRB_H
#define __ASM_SH_CMPXCHG_GRB_H
static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
{
unsigned long retval;
__asm__ __volatile__ (
" .align 2 \n\t"
" mova 1f, r0 \n\t" /* r0 = end point */
" nop \n\t"
" mov r15, r1 \n\t" /* r1 = saved sp */
" mov #-4, r15 \n\t" /* LOGIN */
" mov.l @%1, %0 \n\t" /* load old value */
" mov.l %2, @%1 \n\t" /* store new value */
"1: mov r1, r15 \n\t" /* LOGOUT */
: "=&r" (retval),
"+r" (m)
: "r" (val)
: "memory", "r0", "r1");
return retval;
}
static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
{
unsigned long retval;
__asm__ __volatile__ (
" .align 2 \n\t"
" mova 1f, r0 \n\t" /* r0 = end point */
" mov r15, r1 \n\t" /* r1 = saved sp */
" mov #-6, r15 \n\t" /* LOGIN */
" mov.b @%1, %0 \n\t" /* load old value */
" extu.b %0, %0 \n\t" /* extend as unsigned */
" mov.b %2, @%1 \n\t" /* store new value */
"1: mov r1, r15 \n\t" /* LOGOUT */
: "=&r" (retval),
"+r" (m)
: "r" (val)
: "memory" , "r0", "r1");
return retval;
}
static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
unsigned long new)
{
unsigned long retval;
__asm__ __volatile__ (
" .align 2 \n\t"
" mova 1f, r0 \n\t" /* r0 = end point */
" nop \n\t"
" mov r15, r1 \n\t" /* r1 = saved sp */
" mov #-8, r15 \n\t" /* LOGIN */
" mov.l @%1, %0 \n\t" /* load old value */
" cmp/eq %0, %2 \n\t"
" bf 1f \n\t" /* if not equal */
" mov.l %2, @%1 \n\t" /* store new value */
"1: mov r1, r15 \n\t" /* LOGOUT */
: "=&r" (retval),
"+r" (m)
: "r" (new)
: "memory" , "r0", "r1", "t");
return retval;
}
#endif /* __ASM_SH_CMPXCHG_GRB_H */