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1 | /* |
1 | /* |
2 | # |
2 | * |
3 | # Copyright (C) 2005 Jakub Vana |
3 | * Copyright (C) 2005 Jakub Vana |
4 | # All rights reserved. |
4 | * All rights reserved. |
5 | # |
5 | * |
6 | # Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
7 | # modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
8 | # are met: |
8 | * are met: |
9 | # |
9 | * |
10 | # - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
11 | # notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
12 | # - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
13 | # notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | # documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
15 | # - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
16 | # derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
17 | # |
17 | * |
18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (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. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | # |
28 | * |
29 | */ |
29 | */ |
30 | 30 | ||
31 | #include <fpu_context.h> |
31 | #include <fpu_context.h> |
32 | #include <arch.h> |
32 | #include <arch.h> |
33 | #include <cpu.h> |
33 | #include <cpu.h> |
34 | 34 | ||
35 | - | ||
36 | void fpu_context_save(fpu_context_t *fctx) |
35 | void fpu_context_save(fpu_context_t *fctx) |
37 | { |
36 | { |
38 | } |
37 | } |
39 | 38 | ||
40 | 39 | ||
41 | void fpu_context_restore(fpu_context_t *fctx) |
40 | void fpu_context_restore(fpu_context_t *fctx) |
42 | { |
41 | { |
43 | if(THREAD==CPU->fpu_owner) {reset_TS_flag(); } |
42 | if(THREAD==CPU->fpu_owner) {reset_TS_flag(); } |
44 | else |
43 | else |
45 | { |
44 | { |
46 | set_TS_flag(); |
45 | set_TS_flag(); |
47 | if((CPU->fpu_owner)!=NULL)(CPU->fpu_owner)->fpu_context_engaged=1; |
46 | if((CPU->fpu_owner)!=NULL)(CPU->fpu_owner)->fpu_context_engaged=1; |
48 | } |
47 | } |
49 | } |
48 | } |
50 | 49 | ||
51 | 50 | ||
52 | void fpu_lazy_context_save(fpu_context_t *fctx) |
51 | void fpu_lazy_context_save(fpu_context_t *fctx) |
53 | { |
52 | { |
54 | asm |
53 | asm |
55 | ( |
54 | ( |
56 | "push %%eax;" |
55 | "push %%eax;" |
57 | "mov 0x8(%%esp),%%eax;" |
56 | "mov 0x8(%%esp),%%eax;" |
58 | "fnsave (%%eax);" |
57 | "fnsave (%%eax);" |
59 | "pop %%eax;" |
58 | "pop %%eax;" |
60 | :"=m"(fctx) |
59 | :"=m"(fctx) |
61 | : |
60 | : |
62 | :"eax" |
61 | :"eax" |
63 | ); |
62 | ); |
64 | } |
63 | } |
65 | 64 | ||
66 | void fpu_lazy_context_restore(fpu_context_t *fctx) |
65 | void fpu_lazy_context_restore(fpu_context_t *fctx) |
67 | { |
66 | { |
68 | asm |
67 | asm |
69 | ( |
68 | ( |
70 | "push %%eax;" |
69 | "push %%eax;" |
71 | "mov 0x8(%%esp),%%eax;" |
70 | "mov 0x8(%%esp),%%eax;" |
72 | "frstor (%%eax);" |
71 | "frstor (%%eax);" |
73 | "pop %%eax;" |
72 | "pop %%eax;" |
74 | :"=m"(fctx) |
73 | :"=m"(fctx) |
75 | : |
74 | : |
76 | :"eax" |
75 | :"eax" |
77 | ); |
76 | ); |
78 | } |
77 | } |
79 | 78 | ||
80 | void fpu_init(void) |
79 | void fpu_init(void) |
81 | { |
80 | { |
82 | asm( |
81 | asm( |
83 | "fninit;" |
82 | "fninit;" |
84 | ); |
83 | ); |
85 | } |
84 | } |
86 | - | ||
87 | 85 |