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1 | /* |
1 | /* |
2 | * |
- | |
3 | * Copyright (C) 2005 Jakub Vana |
2 | * Copyright (C) 2005 Jakub Vana |
4 | * All rights reserved. |
3 | * All rights reserved. |
5 | * |
4 | * |
6 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
8 | * are met: |
7 | * are met: |
9 | * |
8 | * |
10 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
12 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
15 | * - 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 |
16 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
17 | * |
16 | * |
18 | * 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 |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * 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, |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * 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, |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (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 |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | * |
27 | * |
29 | */ |
28 | */ |
30 | 29 | ||
31 | #include <fpu_context.h> |
30 | #include <fpu_context.h> |
32 | #include <arch.h> |
31 | #include <arch.h> |
33 | #include <cpu.h> |
32 | #include <cpu.h> |
34 | 33 | ||
35 | void fpu_context_save(fpu_context_t *fctx) |
34 | void fpu_context_save(fpu_context_t *fctx) |
36 | { |
35 | { |
37 | } |
36 | } |
38 | 37 | ||
39 | 38 | ||
40 | void fpu_context_restore(fpu_context_t *fctx) |
39 | void fpu_context_restore(fpu_context_t *fctx) |
41 | { |
40 | { |
42 | if(THREAD==CPU->fpu_owner) {reset_TS_flag(); } |
41 | if(THREAD==CPU->fpu_owner) {reset_TS_flag(); } |
43 | else |
42 | else |
44 | { |
43 | { |
45 | set_TS_flag(); |
44 | set_TS_flag(); |
46 | 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; |
47 | } |
46 | } |
48 | } |
47 | } |
49 | 48 | ||
50 | 49 | ||
51 | void fpu_lazy_context_save(fpu_context_t *fctx) |
50 | void fpu_lazy_context_save(fpu_context_t *fctx) |
52 | { |
51 | { |
53 | asm |
52 | asm |
54 | ( |
53 | ( |
55 | "push %%eax;" |
54 | "push %%eax;" |
56 | "mov 0x8(%%esp),%%eax;" |
55 | "mov 0x8(%%esp),%%eax;" |
57 | "fnsave (%%eax);" |
56 | "fnsave (%%eax);" |
58 | "pop %%eax;" |
57 | "pop %%eax;" |
59 | :"=m"(fctx) |
58 | :"=m"(fctx) |
60 | : |
59 | : |
61 | :"eax" |
60 | :"eax" |
62 | ); |
61 | ); |
63 | } |
62 | } |
64 | 63 | ||
65 | void fpu_lazy_context_restore(fpu_context_t *fctx) |
64 | void fpu_lazy_context_restore(fpu_context_t *fctx) |
66 | { |
65 | { |
67 | asm |
66 | asm |
68 | ( |
67 | ( |
69 | "push %%eax;" |
68 | "push %%eax;" |
70 | "mov 0x8(%%esp),%%eax;" |
69 | "mov 0x8(%%esp),%%eax;" |
71 | "frstor (%%eax);" |
70 | "frstor (%%eax);" |
72 | "pop %%eax;" |
71 | "pop %%eax;" |
73 | :"=m"(fctx) |
72 | :"=m"(fctx) |
74 | : |
73 | : |
75 | :"eax" |
74 | :"eax" |
76 | ); |
75 | ); |
77 | } |
76 | } |
78 | 77 | ||
79 | void fpu_init(void) |
78 | void fpu_init(void) |
80 | { |
79 | { |
81 | asm( |
80 | asm( |
82 | "fninit;" |
81 | "fninit;" |
83 | ); |
82 | ); |
84 | } |
83 | } |
85 | 84 |