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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 52 | vana | 1 | /* |
| 92 | jermar | 2 | * |
| 3 | * Copyright (C) 2005 Jakub Vana |
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| 4 | * All rights reserved. |
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| 5 | * |
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| 6 | * Redistribution and use in source and binary forms, with or without |
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| 7 | * modification, are permitted provided that the following conditions |
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| 8 | * are met: |
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| 9 | * |
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| 10 | * - Redistributions of source code must retain the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer. |
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| 12 | * - Redistributions in binary form must reproduce the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer in the |
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| 14 | * documentation and/or other materials provided with the distribution. |
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| 15 | * - The name of the author may not be used to endorse or promote products |
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| 16 | * derived from this software without specific prior written permission. |
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| 17 | * |
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 28 | * |
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| 29 | */ |
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| 52 | vana | 30 | |
| 31 | #include <fpu_context.h> |
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| 58 | vana | 32 | #include <arch.h> |
| 33 | #include <cpu.h> |
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| 52 | vana | 34 | |
| 57 | vana | 35 | void fpu_context_save(fpu_context_t *fctx) |
| 52 | vana | 36 | { |
| 37 | } |
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| 38 | |||
| 39 | |||
| 57 | vana | 40 | void fpu_context_restore(fpu_context_t *fctx) |
| 52 | vana | 41 | { |
| 75 | vana | 42 | if(THREAD==CPU->fpu_owner) {reset_TS_flag(); } |
| 80 | vana | 43 | else |
| 44 | { |
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| 45 | set_TS_flag(); |
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| 46 | if((CPU->fpu_owner)!=NULL)(CPU->fpu_owner)->fpu_context_engaged=1; |
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| 47 | } |
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| 52 | vana | 48 | } |
| 49 | |||
| 50 | |||
| 57 | vana | 51 | void fpu_lazy_context_save(fpu_context_t *fctx) |
| 52 | vana | 52 | { |
| 90 | vana | 53 | asm |
| 54 | ( |
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| 55 | "push %%eax;" |
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| 56 | "mov 0x8(%%esp),%%eax;" |
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| 57 | "fnsave (%%eax);" |
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| 58 | "pop %%eax;" |
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| 59 | :"=m"(fctx) |
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| 60 | : |
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| 61 | :"eax" |
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| 62 | ); |
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| 52 | vana | 63 | } |
| 64 | |||
| 57 | vana | 65 | void fpu_lazy_context_restore(fpu_context_t *fctx) |
| 52 | vana | 66 | { |
| 90 | vana | 67 | asm |
| 68 | ( |
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| 69 | "push %%eax;" |
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| 70 | "mov 0x8(%%esp),%%eax;" |
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| 71 | "frstor (%%eax);" |
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| 72 | "pop %%eax;" |
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| 73 | :"=m"(fctx) |
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| 74 | : |
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| 75 | :"eax" |
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| 76 | ); |
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| 52 | vana | 77 | } |
| 73 | vana | 78 | |
| 79 | void fpu_init(void) |
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| 80 | { |
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| 92 | jermar | 81 | asm( |
| 82 | "fninit;" |
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| 83 | ); |
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| 73 | vana | 84 | } |