Subversion Repositories HelenOS

Rev

Rev 2071 | Rev 2089 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
282 palkovsky 1
/*
2071 jermar 2
 * Copyright (c) 2005 Jakub Vana
282 palkovsky 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
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
15
 *   derived from this software without specific prior written permission.
16
 *
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
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1702 cejka 27
 */
28
 
1877 jermar 29
/** @addtogroup amd64  
1702 cejka 30
 * @{
31
 */
32
/** @file
282 palkovsky 33
 *
34
 */
35
 
36
#include <fpu_context.h>
37
#include <arch.h>
38
#include <cpu.h>
39
 
332 palkovsky 40
/** Save FPU (mmx, sse) context using fxsave instruction */
282 palkovsky 41
void fpu_context_save(fpu_context_t *fctx)
42
{
2082 decky 43
    asm volatile (
282 palkovsky 44
        "fxsave %0"
45
        : "=m"(*fctx)
46
        );
47
}
48
 
332 palkovsky 49
/** Restore FPU (mmx,sse) context using fxrstor instruction */
309 palkovsky 50
void fpu_context_restore(fpu_context_t *fctx)
282 palkovsky 51
{
2082 decky 52
    asm volatile (
282 palkovsky 53
        "fxrstor %0"
54
        : "=m"(*fctx)
55
        );
56
}
57
 
906 palkovsky 58
void fpu_init()
282 palkovsky 59
{
326 palkovsky 60
    /* TODO: Zero all SSE, MMX etc. registers */
2082 decky 61
    asm volatile (
282 palkovsky 62
        "fninit;"
63
    );
64
}
1702 cejka 65
 
1877 jermar 66
/** @}
1702 cejka 67
 */