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a62a3861 PM |
1 | #ifndef __ASM_SH_SYSTEM_32_H |
2 | #define __ASM_SH_SYSTEM_32_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | ||
6 | struct task_struct *__switch_to(struct task_struct *prev, | |
7 | struct task_struct *next); | |
8 | ||
9 | /* | |
10 | * switch_to() should switch tasks to task nr n, first | |
11 | */ | |
830626ca PM |
12 | #define switch_to(prev, next, last) \ |
13 | do { \ | |
14 | register u32 *__ts1 __asm__ ("r1") = (u32 *)&prev->thread.sp; \ | |
15 | register u32 *__ts2 __asm__ ("r2") = (u32 *)&prev->thread.pc; \ | |
16 | register u32 *__ts4 __asm__ ("r4") = (u32 *)prev; \ | |
17 | register u32 *__ts5 __asm__ ("r5") = (u32 *)next; \ | |
18 | register u32 *__ts6 __asm__ ("r6") = (u32 *)&next->thread.sp; \ | |
19 | register u32 __ts7 __asm__ ("r7") = next->thread.pc; \ | |
20 | struct task_struct *__last; \ | |
21 | \ | |
22 | __asm__ __volatile__ ( \ | |
23 | ".balign 4\n\t" \ | |
24 | "stc.l gbr, @-r15\n\t" \ | |
25 | "sts.l pr, @-r15\n\t" \ | |
26 | "mov.l r8, @-r15\n\t" \ | |
27 | "mov.l r9, @-r15\n\t" \ | |
28 | "mov.l r10, @-r15\n\t" \ | |
29 | "mov.l r11, @-r15\n\t" \ | |
30 | "mov.l r12, @-r15\n\t" \ | |
31 | "mov.l r13, @-r15\n\t" \ | |
32 | "mov.l r14, @-r15\n\t" \ | |
33 | "mov.l r15, @r1\t! save SP\n\t" \ | |
34 | "mov.l @r6, r15\t! change to new stack\n\t" \ | |
35 | "mova 1f, %0\n\t" \ | |
36 | "mov.l %0, @r2\t! save PC\n\t" \ | |
37 | "mov.l 2f, %0\n\t" \ | |
38 | "jmp @%0\t! call __switch_to\n\t" \ | |
39 | " lds r7, pr\t! with return to new PC\n\t" \ | |
40 | ".balign 4\n" \ | |
41 | "2:\n\t" \ | |
42 | ".long __switch_to\n" \ | |
43 | "1:\n\t" \ | |
44 | "mov.l @r15+, r14\n\t" \ | |
45 | "mov.l @r15+, r13\n\t" \ | |
46 | "mov.l @r15+, r12\n\t" \ | |
47 | "mov.l @r15+, r11\n\t" \ | |
48 | "mov.l @r15+, r10\n\t" \ | |
49 | "mov.l @r15+, r9\n\t" \ | |
50 | "mov.l @r15+, r8\n\t" \ | |
51 | "lds.l @r15+, pr\n\t" \ | |
52 | "ldc.l @r15+, gbr\n\t" \ | |
53 | : "=z" (__last) \ | |
54 | : "r" (__ts1), "r" (__ts2), "r" (__ts4), \ | |
55 | "r" (__ts5), "r" (__ts6), "r" (__ts7) \ | |
56 | : "r3", "t"); \ | |
57 | \ | |
58 | last = __last; \ | |
a62a3861 PM |
59 | } while (0) |
60 | ||
cbaa118e SM |
61 | #define __uses_jump_to_uncached __attribute__ ((__section__ (".uncached.text"))) |
62 | ||
a62a3861 | 63 | /* |
cbaa118e SM |
64 | * Jump to uncached area. |
65 | * When handling TLB or caches, we need to do it from an uncached area. | |
a62a3861 | 66 | */ |
cbaa118e SM |
67 | #define jump_to_uncached() \ |
68 | do { \ | |
69 | unsigned long __dummy; \ | |
70 | \ | |
71 | __asm__ __volatile__( \ | |
72 | "mova 1f, %0\n\t" \ | |
73 | "add %1, %0\n\t" \ | |
74 | "jmp @%0\n\t" \ | |
75 | " nop\n\t" \ | |
76 | ".balign 4\n" \ | |
77 | "1:" \ | |
78 | : "=&z" (__dummy) \ | |
79 | : "r" (cached_to_uncached)); \ | |
a62a3861 PM |
80 | } while (0) |
81 | ||
82 | /* | |
cbaa118e | 83 | * Back to cached area. |
a62a3861 | 84 | */ |
cbaa118e | 85 | #define back_to_cached() \ |
a62a3861 PM |
86 | do { \ |
87 | unsigned long __dummy; \ | |
88 | ctrl_barrier(); \ | |
89 | __asm__ __volatile__( \ | |
90 | "mov.l 1f, %0\n\t" \ | |
91 | "jmp @%0\n\t" \ | |
92 | " nop\n\t" \ | |
93 | ".balign 4\n" \ | |
94 | "1: .long 2f\n" \ | |
95 | "2:" \ | |
96 | : "=&r" (__dummy)); \ | |
97 | } while (0) | |
98 | ||
e7cc9a73 MD |
99 | int handle_unaligned_access(opcode_t instruction, struct pt_regs *regs, |
100 | struct mem_access *ma); | |
101 | ||
a62a3861 | 102 | #endif /* __ASM_SH_SYSTEM_32_H */ |