Subversion Repositories HelenOS

Rev

Rev 3022 | 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>
4055 trochtova 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
 */
4055 trochtova 51
#define AMD_CPUID_EBX  0x68747541
52
#define AMD_CPUID_ECX  0x444d4163
53
#define AMD_CPUID_EDX  0x69746e65
1 jermar 54
 
4055 trochtova 55
#define INTEL_CPUID_EBX  0x756e6547
56
#define INTEL_CPUID_ECX  0x6c65746e
57
#define INTEL_CPUID_EDX  0x49656e69
1 jermar 58
 
141 vana 59
 
1 jermar 60
enum vendor {
4055 trochtova 61
    VendorUnknown = 0,
1 jermar 62
    VendorAMD,
63
    VendorIntel
64
};
65
 
66
static char *vendor_str[] = {
67
    "Unknown Vendor",
4055 trochtova 68
    "AMD",
69
    "Intel"
1 jermar 70
};
71
 
309 palkovsky 72
void fpu_disable(void)
58 vana 73
{
2082 decky 74
    asm volatile (
4055 trochtova 75
        "mov %%cr0, %%eax\n"
76
        "or $8, %%eax\n"
77
        "mov %%eax, %%cr0\n"
78
        ::: "%eax"
58 vana 79
    );
80
}
81
 
309 palkovsky 82
void fpu_enable(void)
58 vana 83
{
2082 decky 84
    asm volatile (
4055 trochtova 85
        "mov %%cr0, %%eax\n"
86
        "and $0xffFFffF7, %%eax\n"
87
        "mov %%eax,%%cr0\n"
88
        ::: "%eax"
89
    );
58 vana 90
}
91
 
1 jermar 92
void cpu_arch_init(void)
93
{
1187 jermar 94
    cpuid_feature_info fi;
95
    cpuid_extended_feature_info efi;
96
    cpu_info_t info;
1780 jermar 97
    uint32_t help = 0;
1019 vana 98
 
15 jermar 99
    CPU->arch.tss = tss_p;
1780 jermar 100
    CPU->arch.tss->iomap_base = &CPU->arch.tss->iomap[0] - ((uint8_t *) CPU->arch.tss);
4055 trochtova 101
 
1187 jermar 102
    CPU->fpu_owner = NULL;
4055 trochtova 103
 
1019 vana 104
    cpuid(1, &info);
4055 trochtova 105
 
1187 jermar 106
    fi.word = info.cpuid_edx;
107
    efi.word = info.cpuid_ecx;
1019 vana 108
 
1187 jermar 109
    if (fi.bits.fxsr)
110
        fpu_fxsr();
111
    else
4055 trochtova 112
        fpu_fsr();
1019 vana 113
 
1187 jermar 114
    if (fi.bits.sse) {
115
        asm volatile (
4055 trochtova 116
            "mov %%cr4, %[help]\n"
117
            "or %[mask], %[help]\n"
118
            "mov %[help], %%cr4\n"
119
            : [help] "+r" (help)
120
            : [mask] "i" (CR4_OSFXSR_MASK | (1 << 10))
1187 jermar 121
        );
122
    }
4055 trochtova 123
 
124
    /* Setup fast SYSENTER/SYSEXIT syscalls */
125
    syscall_setup_cpu();
1 jermar 126
}
127
 
128
void cpu_identify(void)
129
{
130
    cpu_info_t info;
131
 
15 jermar 132
    CPU->arch.vendor = VendorUnknown;
1 jermar 133
    if (has_cpuid()) {
134
        cpuid(0, &info);
135
 
136
        /*
137
         * Check for AMD processor.
138
         */
4055 trochtova 139
        if ((info.cpuid_ebx == AMD_CPUID_EBX)
140
            && (info.cpuid_ecx == AMD_CPUID_ECX)
141
            && (info.cpuid_edx == AMD_CPUID_EDX))
15 jermar 142
            CPU->arch.vendor = VendorAMD;
4055 trochtova 143
 
1 jermar 144
        /*
145
         * Check for Intel processor.
146
         */    
4055 trochtova 147
        if ((info.cpuid_ebx == INTEL_CPUID_EBX)
148
            && (info.cpuid_ecx == INTEL_CPUID_ECX)
149
            && (info.cpuid_edx == INTEL_CPUID_EDX))
15 jermar 150
            CPU->arch.vendor = VendorIntel;
4055 trochtova 151
 
1 jermar 152
        cpuid(1, &info);
4055 trochtova 153
        CPU->arch.family = (info.cpuid_eax >> 8) & 0x0f;
154
        CPU->arch.model = (info.cpuid_eax >> 4) & 0x0f;
155
        CPU->arch.stepping = (info.cpuid_eax >> 0) & 0x0f;                     
1 jermar 156
    }
157
}
158
 
4055 trochtova 159
void cpu_print_report(cpu_t* cpu)
1 jermar 160
{
4055 trochtova 161
    printf("cpu%u: (%s family=%u model=%u stepping=%u) %" PRIu16 " MHz\n",
162
        cpu->id, vendor_str[cpu->arch.vendor], cpu->arch.family,
163
        cpu->arch.model, cpu->arch.stepping, cpu->frequency_mhz);
1 jermar 164
}
1702 cejka 165
 
1731 jermar 166
/** @}
1702 cejka 167
 */