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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); |
|
| - | 35 | ||
| - | 36 | static fpu_context_function fpu_save,fpu_restore; |
|
| - | 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) |
|
| - | 57 | { |
|
| - | 58 | __asm__ volatile ( |
|
| - | 59 | "fxsave %0" |
|
| - | 60 | : "=m"(*fctx) |
|
| - | 61 | ); |
|
| - | 62 | } |
|
| - | 63 | ||
| - | 64 | static void fpu_context_fx_restore(fpu_context_t *fctx) |
|
| - | 65 | { |
|
| - | 66 | __asm__ volatile ( |
|
| - | 67 | "fxrstor %0" |
|
| - | 68 | : "=m"(*fctx) |
|
| - | 69 | ); |
|
| - | 70 | } |
|
| - | 71 | ||
| - | 72 | /* |
|
| - | 73 | Setup using fxsr instruction |
|
| - | 74 | */ |
|
| - | 75 | void fpu_fxsr(void) |
|
| - | 76 | { |
|
| - | 77 | fpu_save=fpu_context_fx_save; |
|
| - | 78 | fpu_restore=fpu_context_fx_restore; |
|
| - | 79 | } |
|
| - | 80 | /* |
|
| - | 81 | Setup using not fxsr instruction |
|
| - | 82 | */ |
|
| - | 83 | void fpu_fsr(void) |
|
| - | 84 | { |
|
| - | 85 | fpu_save=fpu_context_f_save; |
|
| - | 86 | fpu_restore=fpu_context_f_restore; |
|
| - | 87 | } |
|
| - | 88 | ||
| - | 89 | ||
| - | 90 | ||
| - | 91 | void fpu_context_save(fpu_context_t *fctx) |
|
| - | 92 | { |
|
| - | 93 | fpu_save(fctx); |
|
| - | 94 | } |
|
| - | 95 | ||
| - | 96 | void fpu_context_restore(fpu_context_t *fctx) |
|
| - | 97 | { |
|
| - | 98 | fpu_restore(fctx); |
|
| - | 99 | } |
|
| - | 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" |
|
| - | 109 | "mov %0,%1;\n" |
|
| - | 110 | "or %2,%1;\n" |
|
| - | 111 | "mov %1,%0;\n" |
|
| - | 112 | "ldmxcsr %0;\n" |
|
| - | 113 | :"+m"(help0),"+r"(help1) |
|
| - | 114 | :"i"(0x1f80) |
|
| 55 | ); |
115 | ); |
| 56 | } |
116 | } |