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e839ca52 DH |
1 | #ifndef __ASM_SH_SWITCH_TO_32_H |
2 | #define __ASM_SH_SWITCH_TO_32_H | |
a62a3861 | 3 | |
01ab1039 MT |
4 | #ifdef CONFIG_SH_DSP |
5 | ||
6 | #define is_dsp_enabled(tsk) \ | |
7 | (!!(tsk->thread.dsp_status.status & SR_DSP)) | |
8 | ||
9 | #define __restore_dsp(tsk) \ | |
10 | do { \ | |
11 | register u32 *__ts2 __asm__ ("r2") = \ | |
12 | (u32 *)&tsk->thread.dsp_status; \ | |
13 | __asm__ __volatile__ ( \ | |
14 | ".balign 4\n\t" \ | |
485f0720 | 15 | "movs.l @r2+, a0\n\t" \ |
01ab1039 MT |
16 | "movs.l @r2+, a1\n\t" \ |
17 | "movs.l @r2+, a0g\n\t" \ | |
18 | "movs.l @r2+, a1g\n\t" \ | |
19 | "movs.l @r2+, m0\n\t" \ | |
20 | "movs.l @r2+, m1\n\t" \ | |
01ab1039 MT |
21 | "movs.l @r2+, x0\n\t" \ |
22 | "movs.l @r2+, x1\n\t" \ | |
23 | "movs.l @r2+, y0\n\t" \ | |
24 | "movs.l @r2+, y1\n\t" \ | |
25 | "lds.l @r2+, dsr\n\t" \ | |
26 | "ldc.l @r2+, rs\n\t" \ | |
27 | "ldc.l @r2+, re\n\t" \ | |
28 | "ldc.l @r2+, mod\n\t" \ | |
29 | : : "r" (__ts2)); \ | |
30 | } while (0) | |
31 | ||
01ab1039 MT |
32 | #define __save_dsp(tsk) \ |
33 | do { \ | |
34 | register u32 *__ts2 __asm__ ("r2") = \ | |
35 | (u32 *)&tsk->thread.dsp_status + 14; \ | |
36 | \ | |
37 | __asm__ __volatile__ ( \ | |
38 | ".balign 4\n\t" \ | |
485f0720 | 39 | "stc.l mod, @-r2\n\t" \ |
01ab1039 MT |
40 | "stc.l re, @-r2\n\t" \ |
41 | "stc.l rs, @-r2\n\t" \ | |
485f0720 PM |
42 | "sts.l dsr, @-r2\n\t" \ |
43 | "movs.l y1, @-r2\n\t" \ | |
44 | "movs.l y0, @-r2\n\t" \ | |
45 | "movs.l x1, @-r2\n\t" \ | |
46 | "movs.l x0, @-r2\n\t" \ | |
47 | "movs.l m1, @-r2\n\t" \ | |
48 | "movs.l m0, @-r2\n\t" \ | |
49 | "movs.l a1g, @-r2\n\t" \ | |
50 | "movs.l a0g, @-r2\n\t" \ | |
51 | "movs.l a1, @-r2\n\t" \ | |
52 | "movs.l a0, @-r2\n\t" \ | |
01ab1039 MT |
53 | : : "r" (__ts2)); \ |
54 | } while (0) | |
55 | ||
56 | #else | |
57 | ||
58 | #define is_dsp_enabled(tsk) (0) | |
59 | #define __save_dsp(tsk) do { } while (0) | |
60 | #define __restore_dsp(tsk) do { } while (0) | |
61 | #endif | |
62 | ||
a62a3861 PM |
63 | struct task_struct *__switch_to(struct task_struct *prev, |
64 | struct task_struct *next); | |
65 | ||
66 | /* | |
67 | * switch_to() should switch tasks to task nr n, first | |
68 | */ | |
01ab1039 MT |
69 | #define switch_to(prev, next, last) \ |
70 | do { \ | |
71 | register u32 *__ts1 __asm__ ("r1"); \ | |
72 | register u32 *__ts2 __asm__ ("r2"); \ | |
73 | register u32 *__ts4 __asm__ ("r4"); \ | |
74 | register u32 *__ts5 __asm__ ("r5"); \ | |
75 | register u32 *__ts6 __asm__ ("r6"); \ | |
76 | register u32 __ts7 __asm__ ("r7"); \ | |
77 | struct task_struct *__last; \ | |
78 | \ | |
79 | if (is_dsp_enabled(prev)) \ | |
80 | __save_dsp(prev); \ | |
b31fdac2 PZ |
81 | if (is_dsp_enabled(next)) \ |
82 | __restore_dsp(next); \ | |
01ab1039 MT |
83 | \ |
84 | __ts1 = (u32 *)&prev->thread.sp; \ | |
85 | __ts2 = (u32 *)&prev->thread.pc; \ | |
86 | __ts4 = (u32 *)prev; \ | |
87 | __ts5 = (u32 *)next; \ | |
88 | __ts6 = (u32 *)&next->thread.sp; \ | |
89 | __ts7 = next->thread.pc; \ | |
90 | \ | |
91 | __asm__ __volatile__ ( \ | |
92 | ".balign 4\n\t" \ | |
93 | "stc.l gbr, @-r15\n\t" \ | |
94 | "sts.l pr, @-r15\n\t" \ | |
95 | "mov.l r8, @-r15\n\t" \ | |
96 | "mov.l r9, @-r15\n\t" \ | |
97 | "mov.l r10, @-r15\n\t" \ | |
98 | "mov.l r11, @-r15\n\t" \ | |
99 | "mov.l r12, @-r15\n\t" \ | |
100 | "mov.l r13, @-r15\n\t" \ | |
101 | "mov.l r14, @-r15\n\t" \ | |
102 | "mov.l r15, @r1\t! save SP\n\t" \ | |
103 | "mov.l @r6, r15\t! change to new stack\n\t" \ | |
104 | "mova 1f, %0\n\t" \ | |
105 | "mov.l %0, @r2\t! save PC\n\t" \ | |
106 | "mov.l 2f, %0\n\t" \ | |
107 | "jmp @%0\t! call __switch_to\n\t" \ | |
108 | " lds r7, pr\t! with return to new PC\n\t" \ | |
109 | ".balign 4\n" \ | |
110 | "2:\n\t" \ | |
111 | ".long __switch_to\n" \ | |
112 | "1:\n\t" \ | |
113 | "mov.l @r15+, r14\n\t" \ | |
114 | "mov.l @r15+, r13\n\t" \ | |
115 | "mov.l @r15+, r12\n\t" \ | |
116 | "mov.l @r15+, r11\n\t" \ | |
117 | "mov.l @r15+, r10\n\t" \ | |
118 | "mov.l @r15+, r9\n\t" \ | |
119 | "mov.l @r15+, r8\n\t" \ | |
120 | "lds.l @r15+, pr\n\t" \ | |
121 | "ldc.l @r15+, gbr\n\t" \ | |
122 | : "=z" (__last) \ | |
123 | : "r" (__ts1), "r" (__ts2), "r" (__ts4), \ | |
124 | "r" (__ts5), "r" (__ts6), "r" (__ts7) \ | |
125 | : "r3", "t"); \ | |
126 | \ | |
127 | last = __last; \ | |
128 | } while (0) | |
129 | ||
e839ca52 | 130 | #endif /* __ASM_SH_SWITCH_TO_32_H */ |