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| Rev | Author | Line No. | Line |
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| 52 | vana | 1 | /* |
| 92 | jermar | 2 | * Copyright (C) 2005 Jakub Vana |
| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | * |
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| 28 | */ |
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| 52 | vana | 29 | |
| 30 | #include <fpu_context.h> |
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| 58 | vana | 31 | #include <arch.h> |
| 32 | #include <cpu.h> |
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| 52 | vana | 33 | |
| 57 | vana | 34 | void fpu_context_save(fpu_context_t *fctx) |
| 52 | vana | 35 | { |
| 36 | } |
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| 37 | |||
| 38 | |||
| 57 | vana | 39 | void fpu_context_restore(fpu_context_t *fctx) |
| 52 | vana | 40 | { |
| 281 | palkovsky | 41 | if (THREAD==CPU->fpu_owner) |
| 42 | reset_TS_flag(); |
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| 43 | else { |
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| 80 | vana | 44 | set_TS_flag(); |
| 281 | palkovsky | 45 | if (CPU->fpu_owner != NULL) |
| 46 | (CPU->fpu_owner)->fpu_context_engaged=1; |
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| 80 | vana | 47 | } |
| 52 | vana | 48 | } |
| 49 | |||
| 50 | |||
| 57 | vana | 51 | void fpu_lazy_context_save(fpu_context_t *fctx) |
| 52 | vana | 52 | { |
| 281 | palkovsky | 53 | __asm__ volatile ( |
| 257 | palkovsky | 54 | "fnsave %0" |
| 281 | palkovsky | 55 | : "=m"(*fctx) |
| 257 | palkovsky | 56 | ); |
| 281 | palkovsky | 57 | return; |
| 52 | vana | 58 | } |
| 59 | |||
| 57 | vana | 60 | void fpu_lazy_context_restore(fpu_context_t *fctx) |
| 52 | vana | 61 | { |
| 281 | palkovsky | 62 | __asm__ volatile ( |
| 257 | palkovsky | 63 | "frstor %0" |
| 281 | palkovsky | 64 | : "=m"(*fctx) |
| 257 | palkovsky | 65 | ); |
| 281 | palkovsky | 66 | return; |
| 52 | vana | 67 | } |
| 73 | vana | 68 | |
| 69 | void fpu_init(void) |
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| 70 | { |
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| 281 | palkovsky | 71 | __asm__ volatile ( |
| 125 | jermar | 72 | "fninit;" |
| 92 | jermar | 73 | ); |
| 73 | vana | 74 | } |