1#ifndef __ASM_SH_CMPXCHG_GRB_H
2#define __ASM_SH_CMPXCHG_GRB_H
3
4static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
5{
6	unsigned long retval;
7
8	__asm__ __volatile__ (
9		"   .align 2              \n\t"
10		"   mova    1f,   r0      \n\t" /* r0 = end point */
11		"   nop                   \n\t"
12		"   mov    r15,   r1      \n\t" /* r1 = saved sp */
13		"   mov    #-4,   r15     \n\t" /* LOGIN */
14		"   mov.l  @%1,   %0      \n\t" /* load  old value */
15		"   mov.l   %2,   @%1     \n\t" /* store new value */
16		"1: mov     r1,   r15     \n\t" /* LOGOUT */
17		: "=&r" (retval),
18		  "+r"  (m),
19		  "+r"  (val)		/* inhibit r15 overloading */
20		:
21		: "memory", "r0", "r1");
22
23	return retval;
24}
25
26static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
27{
28	unsigned long retval;
29
30	__asm__ __volatile__ (
31		"   .align  2             \n\t"
32		"   mova    1f,   r0      \n\t" /* r0 = end point */
33		"   mov    r15,   r1      \n\t" /* r1 = saved sp */
34		"   mov    #-6,   r15     \n\t" /* LOGIN */
35		"   mov.b  @%1,   %0      \n\t" /* load  old value */
36		"   extu.b  %0,   %0      \n\t" /* extend as unsigned */
37		"   mov.b   %2,   @%1     \n\t" /* store new value */
38		"1: mov     r1,   r15     \n\t" /* LOGOUT */
39		: "=&r" (retval),
40		  "+r"  (m),
41		  "+r"  (val)		/* inhibit r15 overloading */
42		:
43		: "memory" , "r0", "r1");
44
45	return retval;
46}
47
48static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
49					  unsigned long new)
50{
51	unsigned long retval;
52
53	__asm__ __volatile__ (
54		"   .align  2             \n\t"
55		"   mova    1f,   r0      \n\t" /* r0 = end point */
56		"   nop                   \n\t"
57		"   mov    r15,   r1      \n\t" /* r1 = saved sp */
58		"   mov    #-8,   r15     \n\t" /* LOGIN */
59		"   mov.l  @%3,   %0      \n\t" /* load  old value */
60		"   cmp/eq  %0,   %1      \n\t"
61		"   bf            1f      \n\t" /* if not equal */
62		"   mov.l   %2,   @%3     \n\t" /* store new value */
63		"1: mov     r1,   r15     \n\t" /* LOGOUT */
64		: "=&r" (retval),
65		  "+r"  (old), "+r"  (new) /* old or new can be r15 */
66		:  "r"  (m)
67		: "memory" , "r0", "r1", "t");
68
69	return retval;
70}
71
72#endif /* __ASM_SH_CMPXCHG_GRB_H */
73