1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __ASM_SH_CMPXCHG_GRB_H
3*4882a593Smuzhiyun #define __ASM_SH_CMPXCHG_GRB_H
4*4882a593Smuzhiyun
xchg_u32(volatile u32 * m,unsigned long val)5*4882a593Smuzhiyun static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
6*4882a593Smuzhiyun {
7*4882a593Smuzhiyun unsigned long retval;
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun __asm__ __volatile__ (
10*4882a593Smuzhiyun " .align 2 \n\t"
11*4882a593Smuzhiyun " mova 1f, r0 \n\t" /* r0 = end point */
12*4882a593Smuzhiyun " nop \n\t"
13*4882a593Smuzhiyun " mov r15, r1 \n\t" /* r1 = saved sp */
14*4882a593Smuzhiyun " mov #-4, r15 \n\t" /* LOGIN */
15*4882a593Smuzhiyun " mov.l @%1, %0 \n\t" /* load old value */
16*4882a593Smuzhiyun " mov.l %2, @%1 \n\t" /* store new value */
17*4882a593Smuzhiyun "1: mov r1, r15 \n\t" /* LOGOUT */
18*4882a593Smuzhiyun : "=&r" (retval),
19*4882a593Smuzhiyun "+r" (m),
20*4882a593Smuzhiyun "+r" (val) /* inhibit r15 overloading */
21*4882a593Smuzhiyun :
22*4882a593Smuzhiyun : "memory", "r0", "r1");
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun return retval;
25*4882a593Smuzhiyun }
26*4882a593Smuzhiyun
xchg_u16(volatile u16 * m,unsigned long val)27*4882a593Smuzhiyun static inline unsigned long xchg_u16(volatile u16 *m, unsigned long val)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun unsigned long retval;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun __asm__ __volatile__ (
32*4882a593Smuzhiyun " .align 2 \n\t"
33*4882a593Smuzhiyun " mova 1f, r0 \n\t" /* r0 = end point */
34*4882a593Smuzhiyun " mov r15, r1 \n\t" /* r1 = saved sp */
35*4882a593Smuzhiyun " mov #-6, r15 \n\t" /* LOGIN */
36*4882a593Smuzhiyun " mov.w @%1, %0 \n\t" /* load old value */
37*4882a593Smuzhiyun " extu.w %0, %0 \n\t" /* extend as unsigned */
38*4882a593Smuzhiyun " mov.w %2, @%1 \n\t" /* store new value */
39*4882a593Smuzhiyun "1: mov r1, r15 \n\t" /* LOGOUT */
40*4882a593Smuzhiyun : "=&r" (retval),
41*4882a593Smuzhiyun "+r" (m),
42*4882a593Smuzhiyun "+r" (val) /* inhibit r15 overloading */
43*4882a593Smuzhiyun :
44*4882a593Smuzhiyun : "memory" , "r0", "r1");
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return retval;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
xchg_u8(volatile u8 * m,unsigned long val)49*4882a593Smuzhiyun static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun unsigned long retval;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun __asm__ __volatile__ (
54*4882a593Smuzhiyun " .align 2 \n\t"
55*4882a593Smuzhiyun " mova 1f, r0 \n\t" /* r0 = end point */
56*4882a593Smuzhiyun " mov r15, r1 \n\t" /* r1 = saved sp */
57*4882a593Smuzhiyun " mov #-6, r15 \n\t" /* LOGIN */
58*4882a593Smuzhiyun " mov.b @%1, %0 \n\t" /* load old value */
59*4882a593Smuzhiyun " extu.b %0, %0 \n\t" /* extend as unsigned */
60*4882a593Smuzhiyun " mov.b %2, @%1 \n\t" /* store new value */
61*4882a593Smuzhiyun "1: mov r1, r15 \n\t" /* LOGOUT */
62*4882a593Smuzhiyun : "=&r" (retval),
63*4882a593Smuzhiyun "+r" (m),
64*4882a593Smuzhiyun "+r" (val) /* inhibit r15 overloading */
65*4882a593Smuzhiyun :
66*4882a593Smuzhiyun : "memory" , "r0", "r1");
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun return retval;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
__cmpxchg_u32(volatile int * m,unsigned long old,unsigned long new)71*4882a593Smuzhiyun static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
72*4882a593Smuzhiyun unsigned long new)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun unsigned long retval;
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun __asm__ __volatile__ (
77*4882a593Smuzhiyun " .align 2 \n\t"
78*4882a593Smuzhiyun " mova 1f, r0 \n\t" /* r0 = end point */
79*4882a593Smuzhiyun " nop \n\t"
80*4882a593Smuzhiyun " mov r15, r1 \n\t" /* r1 = saved sp */
81*4882a593Smuzhiyun " mov #-8, r15 \n\t" /* LOGIN */
82*4882a593Smuzhiyun " mov.l @%3, %0 \n\t" /* load old value */
83*4882a593Smuzhiyun " cmp/eq %0, %1 \n\t"
84*4882a593Smuzhiyun " bf 1f \n\t" /* if not equal */
85*4882a593Smuzhiyun " mov.l %2, @%3 \n\t" /* store new value */
86*4882a593Smuzhiyun "1: mov r1, r15 \n\t" /* LOGOUT */
87*4882a593Smuzhiyun : "=&r" (retval),
88*4882a593Smuzhiyun "+r" (old), "+r" (new) /* old or new can be r15 */
89*4882a593Smuzhiyun : "r" (m)
90*4882a593Smuzhiyun : "memory" , "r0", "r1", "t");
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun return retval;
93*4882a593Smuzhiyun }
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun #endif /* __ASM_SH_CMPXCHG_GRB_H */
96