Subversion Repositories HelenOS-historic

Rev

Rev 452 | Rev 532 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
2
 * Copyright (C) 2001-2004 Jakub Jermar
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.
27
 */
28
 
29
#include <arch/cpu.h>
30
#include <arch/cpuid.h>
31
#include <arch/pm.h>
32
 
33
#include <arch.h>
34
#include <arch/types.h>
35
#include <print.h>
36
#include <typedefs.h>
391 jermar 37
#include <fpu_context.h>
1 jermar 38
 
16 jermar 39
#include <arch/smp/apic.h>
40
 
1 jermar 41
/*
42
 * Identification of CPUs.
43
 * Contains only non-MP-Specification specific SMP code.
44
 */
45
#define AMD_CPUID_EBX   0x68747541
46
#define AMD_CPUID_ECX   0x444d4163
47
#define AMD_CPUID_EDX   0x69746e65
48
 
49
#define INTEL_CPUID_EBX 0x756e6547
50
#define INTEL_CPUID_ECX 0x6c65746e
51
#define INTEL_CPUID_EDX 0x49656e69
52
 
141 vana 53
 
1 jermar 54
enum vendor {
55
    VendorUnknown=0,
56
    VendorAMD,
57
    VendorIntel
58
};
59
 
60
static char *vendor_str[] = {
61
    "Unknown Vendor",
62
    "AuthenticAMD",
63
    "GenuineIntel"
64
};
65
 
309 palkovsky 66
void fpu_disable(void)
58 vana 67
{
309 palkovsky 68
    __asm__ volatile (
58 vana 69
        "mov %%cr0,%%eax;"
70
        "or $8,%%eax;"
71
        "mov %%eax,%%cr0;"
72
        :
73
        :
74
        :"%eax"
75
    );
76
}
77
 
309 palkovsky 78
void fpu_enable(void)
58 vana 79
{
309 palkovsky 80
    __asm__ volatile (
58 vana 81
        "mov %%cr0,%%eax;"
82
        "and $0xffFFffF7,%%eax;"
83
        "mov %%eax,%%cr0;"
84
        :
85
        :
86
        :"%eax"
87
    ); 
88
}
89
 
90
 
91
 
141 vana 92
 
1 jermar 93
void cpu_arch_init(void)
94
{
15 jermar 95
    CPU->arch.tss = tss_p;
75 vana 96
    CPU->fpu_owner=NULL;
1 jermar 97
}
98
 
99
 
100
void cpu_identify(void)
101
{
102
    cpu_info_t info;
103
 
15 jermar 104
    CPU->arch.vendor = VendorUnknown;
1 jermar 105
    if (has_cpuid()) {
106
        cpuid(0, &info);
107
 
108
        /*
109
         * Check for AMD processor.
110
         */
125 jermar 111
        if (info.cpuid_ebx==AMD_CPUID_EBX && info.cpuid_ecx==AMD_CPUID_ECX && info.cpuid_edx==AMD_CPUID_EDX) {
15 jermar 112
            CPU->arch.vendor = VendorAMD;
1 jermar 113
        }
114
 
115
        /*
116
         * Check for Intel processor.
117
         */    
125 jermar 118
        if (info.cpuid_ebx==INTEL_CPUID_EBX && info.cpuid_ecx==INTEL_CPUID_ECX && info.cpuid_edx==INTEL_CPUID_EDX) {
15 jermar 119
            CPU->arch.vendor = VendorIntel;
1 jermar 120
        }
121
 
122
        cpuid(1, &info);
15 jermar 123
        CPU->arch.family = (info.cpuid_eax>>8)&0xf;
124
        CPU->arch.model = (info.cpuid_eax>>4)&0xf;
125
        CPU->arch.stepping = (info.cpuid_eax>>0)&0xf;                      
1 jermar 126
    }
127
}
128
 
22 jermar 129
void cpu_print_report(cpu_t* m)
1 jermar 130
{
131
    printf("cpu%d: (%s family=%d model=%d stepping=%d) %dMHz\n",
132
        m->id, vendor_str[m->arch.vendor], m->arch.family, m->arch.model, m->arch.stepping,
133
        m->frequency_mhz);
134
}