Subversion Repositories HelenOS

Rev

Rev 348 | Rev 501 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 348 Rev 408
1 
/*
 1 
/*
2 
 * Copyright (C) 2001-2004 Jakub Jermar
 2 
 * Copyright (C) 2001-2004 Jakub Jermar
3 
 * All rights reserved.
 3 
 * All rights reserved.
4 
 *
 4 
 *
5 
 * Redistribution and use in source and binary forms, with or without
 5 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
 6 
 * modification, are permitted provided that the following conditions
7 
 * are met:
 7 
 * are met:
8 
 *
 8 
 *
9 
 * - Redistributions of source code must retain the above copyright
 9 
 * - Redistributions of source code must retain the above copyright
10 
 *   notice, this list of conditions and the following disclaimer.
 10 
 *   notice, this list of conditions and the following disclaimer.
11 
 * - Redistributions in binary form must reproduce the above copyright
 11 
 * - Redistributions in binary form must reproduce the above copyright
12 
 *   notice, this list of conditions and the following disclaimer in the
 12 
 *   notice, this list of conditions and the following disclaimer in the
13 
 *   documentation and/or other materials provided with the distribution.
 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
 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.
 15 
 *   derived from this software without specific prior written permission.
16 
 *
 16 
 *
17 
 * 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
18 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 18 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
 * 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,
21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 
 * 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,
23 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 23 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 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
 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.
 26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
 */
 27 
 */
28 
 
 28 
 
29 
#ifndef __CPUID_H__
 29 
#ifndef __CPUID_H__
30 
#define __CPUID_H__
 30 
#define __CPUID_H__
31 
 
 31 
 
32 
#include <arch/types.h>
 32 
#include <arch/types.h>
33 
 
 33 
 
34 
struct cpu_info {
 34 
struct cpu_info {
35 
    __u32 cpuid_eax;
 35 
    __u32 cpuid_eax;
36 
    __u32 cpuid_ebx;
 36 
    __u32 cpuid_ebx;
37 
    __u32 cpuid_ecx;
 37 
    __u32 cpuid_ecx;
38 
    __u32 cpuid_edx;
 38 
    __u32 cpuid_edx;
39 
} __attribute__ ((packed));
 39 
} __attribute__ ((packed));
40 
 
 40 
 
41 
extern int has_cpuid(void);
 41 
static inline __u32 has_cpuid(void)
- 
 
 42 
{
- 
 
 43 
    __u32 val, ret;
- 
 
 44 
   
- 
 
 45 
    __asm__ volatile (
- 
 
 46 
        "pushf\n"               /* read flags */
- 
 
 47 
        "popl %0\n"
- 
 
 48 
        "movl %0, %1\n"
- 
 
 49 
       
- 
 
 50 
        "btcl $21, %1\n"        /* swap the ID bit */
- 
 
 51 
       
- 
 
 52 
        "pushl %1\n"            /* propagate the change into flags */
- 
 
 53 
        "popf\n"
- 
 
 54 
        "pushf\n"
- 
 
 55 
        "popl %1\n"
- 
 
 56 
       
- 
 
 57 
        "andl $(1 << 21), %0\n" /* interrested only in ID bit */
- 
 
 58 
        "andl $(1 << 21), %1\n"
- 
 
 59 
        "xorl %1, %0\n"
- 
 
 60 
        : "=r" (ret), "=r" (val)
- 
 
 61 
    );
- 
 
 62 
   
- 
 
 63 
    return ret;
- 
 
 64 
}
42 
 
 65 
 
43 
static inline void cpuid(__u32 cmd, struct cpu_info *info)
 66 
static inline void cpuid(__u32 cmd, struct cpu_info *info)
44 
{
 67 
{
45 
        __asm__ volatile (
 68 
    __asm__ volatile (
46 
                "movl %4, %%eax\n"
 69 
        "movl %4, %%eax\n"
47 
                "cpuid\n"
 70 
        "cpuid\n"
- 
 
 71 
       
48 
                "movl %%eax,%0\n"
 72 
        "movl %%eax, %0\n"
49 
                "movl %%ebx,%1\n"
 73 
        "movl %%ebx, %1\n"
50 
                "movl %%ecx,%2\n"
 74 
        "movl %%ecx, %2\n"
51 
                "movl %%edx,%3\n"
 75 
        "movl %%edx, %3\n"
52 
                : "=m" (info->cpuid_eax), "=m" (info->cpuid_ebx), "=m" (info->cpuid_ecx), "=m" (info->cpuid_edx)
 76 
        : "=m" (info->cpuid_eax), "=m" (info->cpuid_ebx), "=m" (info->cpuid_ecx), "=m" (info->cpuid_edx)
53 
                : "m" (cmd)
 77 
        : "m" (cmd)
54 
                : "eax", "ebx", "ecx", "edx"
 78 
        : "eax", "ebx", "ecx", "edx"
55 
        );
 79 
    );
56 
}
 80 
}
57 
 
 81 
 
58 
#endif
 82 
#endif
59 
 
 83