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29 | 29 | ||
30 | #include <fpu_context.h> |
30 | #include <fpu_context.h> |
31 | #include <arch.h> |
31 | #include <arch.h> |
32 | #include <cpu.h> |
32 | #include <cpu.h> |
33 | 33 | ||
- | 34 | typedef void (*fpu_context_function)(fpu_context_t *fctx); |
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- | 35 | ||
- | 36 | static fpu_context_function fpu_save,fpu_restore; |
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- | 37 | ||
- | 38 | ||
- | 39 | ||
34 | void fpu_context_save(fpu_context_t *fctx) |
40 | static void fpu_context_f_save(fpu_context_t *fctx) |
35 | { |
41 | { |
36 | __asm__ volatile ( |
42 | __asm__ volatile ( |
37 | "fnsave %0" |
43 | "fnsave %0" |
38 | : "=m"(*fctx) |
44 | : "=m"(*fctx) |
39 | ); |
45 | ); |
40 | } |
46 | } |
41 | 47 | ||
42 | - | ||
43 | void fpu_context_restore(fpu_context_t *fctx) |
48 | static void fpu_context_f_restore(fpu_context_t *fctx) |
44 | { |
49 | { |
45 | __asm__ volatile ( |
50 | __asm__ volatile ( |
46 | "frstor %0" |
51 | "frstor %0" |
47 | : "=m"(*fctx) |
52 | : "=m"(*fctx) |
48 | ); |
53 | ); |
49 | } |
54 | } |
50 | 55 | ||
- | 56 | static void fpu_context_fx_save(fpu_context_t *fctx) |
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- | 57 | { |
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- | 58 | __asm__ volatile ( |
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- | 59 | "fxsave %0" |
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- | 60 | : "=m"(*fctx) |
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- | 61 | ); |
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- | 62 | } |
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- | 63 | ||
- | 64 | static void fpu_context_fx_restore(fpu_context_t *fctx) |
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- | 65 | { |
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- | 66 | __asm__ volatile ( |
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- | 67 | "fxrstor %0" |
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- | 68 | : "=m"(*fctx) |
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- | 69 | ); |
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- | 70 | } |
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- | 71 | ||
- | 72 | /* |
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- | 73 | Setup using fxsr instruction |
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- | 74 | */ |
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- | 75 | void fpu_fxsr(void) |
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- | 76 | { |
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- | 77 | fpu_save=fpu_context_fx_save; |
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- | 78 | fpu_restore=fpu_context_fx_restore; |
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- | 79 | } |
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- | 80 | /* |
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- | 81 | Setup using not fxsr instruction |
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- | 82 | */ |
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- | 83 | void fpu_fsr(void) |
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- | 84 | { |
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- | 85 | fpu_save=fpu_context_f_save; |
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- | 86 | fpu_restore=fpu_context_f_restore; |
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- | 87 | } |
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- | 88 | ||
- | 89 | ||
- | 90 | ||
- | 91 | void fpu_context_save(fpu_context_t *fctx) |
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- | 92 | { |
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- | 93 | fpu_save(fctx); |
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- | 94 | } |
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- | 95 | ||
- | 96 | void fpu_context_restore(fpu_context_t *fctx) |
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- | 97 | { |
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- | 98 | fpu_restore(fctx); |
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- | 99 | } |
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- | 100 | ||
- | 101 | ||
- | 102 | ||
51 | void fpu_init() |
103 | void fpu_init() |
52 | { |
104 | { |
- | 105 | __u32 help0=0,help1=0; |
|
53 | __asm__ volatile ( |
106 | __asm__ volatile ( |
54 | "fninit;" |
107 | "fninit;\n" |
- | 108 | "stmxcsr %0\n" |
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- | 109 | "mov %0,%1;\n" |
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- | 110 | "or %2,%1;\n" |
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- | 111 | "mov %1,%0;\n" |
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- | 112 | "ldmxcsr %0;\n" |
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- | 113 | :"+m"(help0),"+r"(help1) |
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- | 114 | :"i"(0x1f80) |
|
55 | ); |
115 | ); |
56 | } |
116 | } |