Subversion Repositories HelenOS

Rev

Rev 1705 | Rev 1780 | 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
 
1731 jermar 29
/** @addtogroup ia32
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
1 jermar 35
#include <arch/cpu.h>
36
#include <arch/cpuid.h>
37
#include <arch/pm.h>
38
 
39
#include <arch.h>
40
#include <arch/types.h>
41
#include <print.h>
42
#include <typedefs.h>
391 jermar 43
#include <fpu_context.h>
1 jermar 44
 
16 jermar 45
#include <arch/smp/apic.h>
46
 
1 jermar 47
/*
48
 * Identification of CPUs.
49
 * Contains only non-MP-Specification specific SMP code.
50
 */
51
#define AMD_CPUID_EBX   0x68747541
52
#define AMD_CPUID_ECX   0x444d4163
53
#define AMD_CPUID_EDX   0x69746e65
54
 
55
#define INTEL_CPUID_EBX 0x756e6547
56
#define INTEL_CPUID_ECX 0x6c65746e
57
#define INTEL_CPUID_EDX 0x49656e69
58
 
141 vana 59
 
1 jermar 60
enum vendor {
61
    VendorUnknown=0,
62
    VendorAMD,
63
    VendorIntel
64
};
65
 
66
static char *vendor_str[] = {
67
    "Unknown Vendor",
68
    "AuthenticAMD",
69
    "GenuineIntel"
70
};
71
 
309 palkovsky 72
void fpu_disable(void)
58 vana 73
{
309 palkovsky 74
    __asm__ volatile (
58 vana 75
        "mov %%cr0,%%eax;"
76
        "or $8,%%eax;"
77
        "mov %%eax,%%cr0;"
78
        :
79
        :
80
        :"%eax"
81
    );
82
}
83
 
309 palkovsky 84
void fpu_enable(void)
58 vana 85
{
309 palkovsky 86
    __asm__ volatile (
58 vana 87
        "mov %%cr0,%%eax;"
88
        "and $0xffFFffF7,%%eax;"
89
        "mov %%eax,%%cr0;"
90
        :
91
        :
92
        :"%eax"
93
    ); 
94
}
95
 
1 jermar 96
void cpu_arch_init(void)
97
{
1187 jermar 98
    cpuid_feature_info fi;
99
    cpuid_extended_feature_info efi;
100
    cpu_info_t info;
101
    __u32 help = 0;
1019 vana 102
 
15 jermar 103
    CPU->arch.tss = tss_p;
1187 jermar 104
    CPU->arch.tss->iomap_base = &CPU->arch.tss->iomap[0] - ((__u8 *) CPU->arch.tss);
1019 vana 105
 
1187 jermar 106
    CPU->fpu_owner = NULL;
1019 vana 107
 
108
    cpuid(1, &info);
109
 
1187 jermar 110
    fi.word = info.cpuid_edx;
111
    efi.word = info.cpuid_ecx;
1019 vana 112
 
1187 jermar 113
    if (fi.bits.fxsr)
114
        fpu_fxsr();
115
    else
116
        fpu_fsr(); 
1019 vana 117
 
1187 jermar 118
    if (fi.bits.sse) {
119
        asm volatile (
120
            "mov %%cr4,%0\n"
121
            "or %1,%0\n"
122
            "mov %0,%%cr4\n"
123
            : "+r" (help)
124
            : "i" (CR4_OSFXSR_MASK|(1<<10))
125
        );
126
    }
1 jermar 127
}
128
 
129
void cpu_identify(void)
130
{
131
    cpu_info_t info;
132
 
15 jermar 133
    CPU->arch.vendor = VendorUnknown;
1 jermar 134
    if (has_cpuid()) {
135
        cpuid(0, &info);
136
 
137
        /*
138
         * Check for AMD processor.
139
         */
125 jermar 140
        if (info.cpuid_ebx==AMD_CPUID_EBX && info.cpuid_ecx==AMD_CPUID_ECX && info.cpuid_edx==AMD_CPUID_EDX) {
15 jermar 141
            CPU->arch.vendor = VendorAMD;
1 jermar 142
        }
143
 
144
        /*
145
         * Check for Intel processor.
146
         */    
125 jermar 147
        if (info.cpuid_ebx==INTEL_CPUID_EBX && info.cpuid_ecx==INTEL_CPUID_ECX && info.cpuid_edx==INTEL_CPUID_EDX) {
15 jermar 148
            CPU->arch.vendor = VendorIntel;
1 jermar 149
        }
150
 
151
        cpuid(1, &info);
15 jermar 152
        CPU->arch.family = (info.cpuid_eax>>8)&0xf;
153
        CPU->arch.model = (info.cpuid_eax>>4)&0xf;
154
        CPU->arch.stepping = (info.cpuid_eax>>0)&0xf;                      
1 jermar 155
    }
156
}
157
 
22 jermar 158
void cpu_print_report(cpu_t* m)
1 jermar 159
{
160
    printf("cpu%d: (%s family=%d model=%d stepping=%d) %dMHz\n",
161
        m->id, vendor_str[m->arch.vendor], m->arch.family, m->arch.model, m->arch.stepping,
162
        m->frequency_mhz);
163
}
1702 cejka 164
 
1731 jermar 165
/** @}
1702 cejka 166
 */