]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
6006c0d8 JH |
2 | #ifndef __ASM_METAG_CMPXCHG_LNKGET_H |
3 | #define __ASM_METAG_CMPXCHG_LNKGET_H | |
4 | ||
5 | static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) | |
6 | { | |
7 | int temp, old; | |
8 | ||
9 | smp_mb(); | |
10 | ||
11 | asm volatile ( | |
12 | "1: LNKGETD %1, [%2]\n" | |
13 | " LNKSETD [%2], %3\n" | |
14 | " DEFR %0, TXSTAT\n" | |
15 | " ANDT %0, %0, #HI(0x3f000000)\n" | |
16 | " CMPT %0, #HI(0x02000000)\n" | |
17 | " BNZ 1b\n" | |
18 | #ifdef CONFIG_METAG_LNKGET_AROUND_CACHE | |
19 | " DCACHE [%2], %0\n" | |
20 | #endif | |
21 | : "=&d" (temp), "=&d" (old) | |
22 | : "da" (m), "da" (val) | |
23 | : "cc" | |
24 | ); | |
25 | ||
26 | smp_mb(); | |
27 | ||
28 | return old; | |
29 | } | |
30 | ||
31 | static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) | |
32 | { | |
33 | int temp, old; | |
34 | ||
35 | smp_mb(); | |
36 | ||
37 | asm volatile ( | |
38 | "1: LNKGETD %1, [%2]\n" | |
39 | " LNKSETD [%2], %3\n" | |
40 | " DEFR %0, TXSTAT\n" | |
41 | " ANDT %0, %0, #HI(0x3f000000)\n" | |
42 | " CMPT %0, #HI(0x02000000)\n" | |
43 | " BNZ 1b\n" | |
44 | #ifdef CONFIG_METAG_LNKGET_AROUND_CACHE | |
45 | " DCACHE [%2], %0\n" | |
46 | #endif | |
47 | : "=&d" (temp), "=&d" (old) | |
48 | : "da" (m), "da" (val & 0xff) | |
49 | : "cc" | |
50 | ); | |
51 | ||
52 | smp_mb(); | |
53 | ||
54 | return old; | |
55 | } | |
56 | ||
57 | static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, | |
58 | unsigned long new) | |
59 | { | |
60 | __u32 retval, temp; | |
61 | ||
62 | smp_mb(); | |
63 | ||
64 | asm volatile ( | |
65 | "1: LNKGETD %1, [%2]\n" | |
66 | " CMP %1, %3\n" | |
67 | " LNKSETDEQ [%2], %4\n" | |
68 | " BNE 2f\n" | |
69 | " DEFR %0, TXSTAT\n" | |
70 | " ANDT %0, %0, #HI(0x3f000000)\n" | |
71 | " CMPT %0, #HI(0x02000000)\n" | |
72 | " BNZ 1b\n" | |
73 | #ifdef CONFIG_METAG_LNKGET_AROUND_CACHE | |
74 | " DCACHE [%2], %0\n" | |
75 | #endif | |
76 | "2:\n" | |
6154c187 | 77 | : "=&d" (temp), "=&d" (retval) |
6006c0d8 JH |
78 | : "da" (m), "bd" (old), "da" (new) |
79 | : "cc" | |
80 | ); | |
81 | ||
82 | smp_mb(); | |
83 | ||
84 | return retval; | |
85 | } | |
86 | ||
87 | #endif /* __ASM_METAG_CMPXCHG_LNKGET_H */ |