Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1#ifndef __ASM_SH_SYSTEM_32_H
2#define __ASM_SH_SYSTEM_32_H
3
4#include <linux/types.h>
5
6struct 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 */
12#define switch_to(prev, next, last) \
13do { \
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; \
59} while (0)
60
61#define __uses_jump_to_uncached __attribute__ ((__section__ (".uncached.text")))
62
63/*
64 * Jump to uncached area.
65 * When handling TLB or caches, we need to do it from an uncached area.
66 */
67#define jump_to_uncached() \
68do { \
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)); \
80} while (0)
81
82/*
83 * Back to cached area.
84 */
85#define back_to_cached() \
86do { \
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
99int handle_unaligned_access(opcode_t instruction, struct pt_regs *regs,
100 struct mem_access *ma);
101
102#endif /* __ASM_SH_SYSTEM_32_H */