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| 1 | /* |
1 | /* |
| 2 | * Copyright (C) 2005 Jakub Vana |
2 | * Copyright (C) 2005 Jakub Vana |
| 3 | * All rights reserved. |
3 | * All rights reserved. |
| 4 | * |
4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
7 | * are met: |
| 8 | * |
8 | * |
| 9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
| 14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
| 16 | * |
16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | * |
27 | * |
| 28 | */ |
28 | */ |
| 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 | void fpu_context_save(fpu_context_t *fctx) |
34 | void fpu_context_save(fpu_context_t *fctx) |
| 35 | { |
35 | { |
| 36 | } |
36 | } |
| 37 | 37 | ||
| 38 | 38 | ||
| 39 | void fpu_context_restore(fpu_context_t *fctx) |
39 | void fpu_context_restore(fpu_context_t *fctx) |
| 40 | { |
40 | { |
| 41 | if(THREAD==CPU->fpu_owner) {reset_TS_flag(); } |
41 | if(THREAD==CPU->fpu_owner) {reset_TS_flag(); } |
| 42 | else |
42 | else |
| 43 | { |
43 | { |
| 44 | set_TS_flag(); |
44 | set_TS_flag(); |
| 45 | if((CPU->fpu_owner)!=NULL)(CPU->fpu_owner)->fpu_context_engaged=1; |
45 | if((CPU->fpu_owner)!=NULL)(CPU->fpu_owner)->fpu_context_engaged=1; |
| 46 | } |
46 | } |
| 47 | } |
47 | } |
| 48 | 48 | ||
| 49 | 49 | ||
| 50 | void fpu_lazy_context_save(fpu_context_t *fctx) |
50 | void fpu_lazy_context_save(fpu_context_t *fctx) |
| 51 | { |
51 | { |
| 52 | asm |
52 | asm |
| 53 | ( |
53 | ( |
| 54 | "push %%eax;" |
54 | "push %%eax;" |
| 55 | "mov 0x8(%%esp),%%eax;" |
55 | "mov 0x8(%%esp),%%eax;" |
| 56 | "fnsave (%%eax);" |
56 | "fnsave (%%eax);" |
| 57 | "pop %%eax;" |
57 | "pop %%eax;" |
| 58 | :"=m"(fctx) |
58 | :"=m"(fctx) |
| 59 | : |
59 | : |
| 60 | :"eax" |
60 | :"eax" |
| 61 | ); |
61 | ); |
| 62 | } |
62 | } |
| 63 | 63 | ||
| 64 | void fpu_lazy_context_restore(fpu_context_t *fctx) |
64 | void fpu_lazy_context_restore(fpu_context_t *fctx) |
| 65 | { |
65 | { |
| 66 | asm |
66 | asm |
| 67 | ( |
67 | ( |
| 68 | "push %%eax;" |
68 | "push %%eax;" |
| 69 | "mov 0x8(%%esp),%%eax;" |
69 | "mov 0x8(%%esp),%%eax;" |
| 70 | "frstor (%%eax);" |
70 | "frstor (%%eax);" |
| 71 | "pop %%eax;" |
71 | "pop %%eax;" |
| 72 | :"=m"(fctx) |
72 | :"=m"(fctx) |
| 73 | : |
73 | : |
| 74 | :"eax" |
74 | :"eax" |
| 75 | ); |
75 | ); |
| 76 | } |
76 | } |
| 77 | 77 | ||
| 78 | void fpu_init(void) |
78 | void fpu_init(void) |
| 79 | { |
79 | { |
| 80 | asm( |
80 | asm( |
| 81 | "fninit;" |
81 | "fninit;" |
| 82 | ); |
82 | ); |
| 83 | } |
83 | } |
| 84 | 84 | ||