Subversion Repositories HelenOS

Rev

Rev 2927 | Rev 4337 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
1 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>
391 jermar 42
#include <fpu_context.h>
1 jermar 43
 
16 jermar 44
#include <arch/smp/apic.h>
3535 svoboda 45
#include <arch/syscall.h>
16 jermar 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
{
2082 decky 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
{
2082 decky 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;
1780 jermar 101
    uint32_t help = 0;
1019 vana 102
 
15 jermar 103
    CPU->arch.tss = tss_p;
1780 jermar 104
    CPU->arch.tss->iomap_base = &CPU->arch.tss->iomap[0] - ((uint8_t *) 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
    }
3535 svoboda 127
 
128
    /* Setup fast SYSENTER/SYSEXIT syscalls */
129
    syscall_setup_cpu();
1 jermar 130
}
131
 
132
void cpu_identify(void)
133
{
134
    cpu_info_t info;
135
 
15 jermar 136
    CPU->arch.vendor = VendorUnknown;
1 jermar 137
    if (has_cpuid()) {
138
        cpuid(0, &info);
139
 
140
        /*
141
         * Check for AMD processor.
142
         */
125 jermar 143
        if (info.cpuid_ebx==AMD_CPUID_EBX && info.cpuid_ecx==AMD_CPUID_ECX && info.cpuid_edx==AMD_CPUID_EDX) {
15 jermar 144
            CPU->arch.vendor = VendorAMD;
1 jermar 145
        }
146
 
147
        /*
148
         * Check for Intel processor.
149
         */    
125 jermar 150
        if (info.cpuid_ebx==INTEL_CPUID_EBX && info.cpuid_ecx==INTEL_CPUID_ECX && info.cpuid_edx==INTEL_CPUID_EDX) {
15 jermar 151
            CPU->arch.vendor = VendorIntel;
1 jermar 152
        }
153
 
154
        cpuid(1, &info);
15 jermar 155
        CPU->arch.family = (info.cpuid_eax>>8)&0xf;
156
        CPU->arch.model = (info.cpuid_eax>>4)&0xf;
157
        CPU->arch.stepping = (info.cpuid_eax>>0)&0xf;                      
1 jermar 158
    }
159
}
160
 
22 jermar 161
void cpu_print_report(cpu_t* m)
1 jermar 162
{
163
    printf("cpu%d: (%s family=%d model=%d stepping=%d) %dMHz\n",
164
        m->id, vendor_str[m->arch.vendor], m->arch.family, m->arch.model, m->arch.stepping,
165
        m->frequency_mhz);
166
}
1702 cejka 167
 
1731 jermar 168
/** @}
1702 cejka 169
 */