WebSVN – HelenOS – Diff – /trunk/kernel/arch/ia32/src/cpu/cpu.c


/*
 * Copyright (c) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup ia32
 * @{
 */
/** @file
 */
 
#include <arch/cpu.h>
#include <arch/cpuid.h>
#include <arch/pm.h>
 
#include <arch.h>
#include <arch/types.h>
#include <print.h>
 
#include <fpu_context.h>
 
#include <arch/smp/apic.h>
 
/*
 * Identification of CPUs.
 * Contains only non-MP-Specification specific SMP code.
 */
#define AMD_CPUID_EBX   0x68747541
#define AMD_CPUID_ECX   0x444d4163
#define AMD_CPUID_EDX   0x69746e65
 
#define INTEL_CPUID_EBX 0x756e6547
#define INTEL_CPUID_ECX 0x6c65746e
#define INTEL_CPUID_EDX 0x49656e69
 
 
enum vendor {
    VendorUnknown=0,
    VendorAMD,
    VendorIntel
};
 
static char *vendor_str[] = {
    "Unknown Vendor",
    "AuthenticAMD",
    "GenuineIntel"
};
 
void fpu_disable(void)
{
    asm volatile (
        "mov %%cr0,%%eax;"
        "or $8,%%eax;"
        "mov %%eax,%%cr0;"
        :
        :
        :"%eax"
    );
}
 
void fpu_enable(void)
{
    asm volatile (
        "mov %%cr0,%%eax;"
        "and $0xffFFffF7,%%eax;"
        "mov %%eax,%%cr0;"
        :
        :
        :"%eax"
    ); 
}
 
void cpu_arch_init(void)
{
    cpuid_feature_info fi;
    cpuid_extended_feature_info efi;
    cpu_info_t info;
    uint32_t help = 0;
   
    CPU->arch.tss = tss_p;
    CPU->arch.tss->iomap_base = &CPU->arch.tss->iomap[0] - ((uint8_t *) CPU->arch.tss);
 
    CPU->fpu_owner = NULL;
 
    cpuid(1, &info);
 
    fi.word = info.cpuid_edx;
    efi.word = info.cpuid_ecx;
   
    if (fi.bits.fxsr)
        fpu_fxsr();
    else
        fpu_fsr(); 
   
    if (fi.bits.sse) {
        asm volatile (
            "mov %%cr4,%0\n"
            "or %1,%0\n"
            "mov %0,%%cr4\n"
            : "+r" (help)
            : "i" (CR4_OSFXSR_MASK|(1<<10))
        );
    }
}
 
void cpu_identify(void)
{
    cpu_info_t info;
 
    CPU->arch.vendor = VendorUnknown;
    if (has_cpuid()) {
        cpuid(0, &info);
 
        /*
         * Check for AMD processor.
         */
        if (info.cpuid_ebx==AMD_CPUID_EBX && info.cpuid_ecx==AMD_CPUID_ECX && info.cpuid_edx==AMD_CPUID_EDX) {
            CPU->arch.vendor = VendorAMD;
        }
 
        /*
         * Check for Intel processor.
         */    
        if (info.cpuid_ebx==INTEL_CPUID_EBX && info.cpuid_ecx==INTEL_CPUID_ECX && info.cpuid_edx==INTEL_CPUID_EDX) {
            CPU->arch.vendor = VendorIntel;
        }
               
        cpuid(1, &info);
        CPU->arch.family = (info.cpuid_eax>>8)&0xf;
        CPU->arch.model = (info.cpuid_eax>>4)&0xf;
        CPU->arch.stepping = (info.cpuid_eax>>0)&0xf;                      
    }
}
 
void cpu_print_report(cpu_t* m)
{
    printf("cpu%d: (%s family=%d model=%d stepping=%d) %dMHz\n",
        m->id, vendor_str[m->arch.vendor], m->arch.family, m->arch.model, m->arch.stepping,
        m->frequency_mhz);
}
 
/** @}
 */
 

Rev 2082	Rev 2089
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	/** @addtogroup ia32	29	/** @addtogroup ia32
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <arch/cpu.h>	35	#include <arch/cpu.h>
36	#include <arch/cpuid.h>	36	#include <arch/cpuid.h>
37	#include <arch/pm.h>	37	#include <arch/pm.h>
38		38
39	#include <arch.h>	39	#include <arch.h>
40	#include <arch/types.h>	40	#include <arch/types.h>
41	#include <print.h>	41	#include <print.h>
42	#include <typedefs.h>	-
43	#include <fpu_context.h>	42	#include <fpu_context.h>
44		43
45	#include <arch/smp/apic.h>	44	#include <arch/smp/apic.h>
46		45
47	/*	46	/*
48	* Identification of CPUs.	47	* Identification of CPUs.
49	* Contains only non-MP-Specification specific SMP code.	48	* Contains only non-MP-Specification specific SMP code.
50	*/	49	*/
51	#define AMD_CPUID_EBX 0x68747541	50	#define AMD_CPUID_EBX 0x68747541
52	#define AMD_CPUID_ECX 0x444d4163	51	#define AMD_CPUID_ECX 0x444d4163
53	#define AMD_CPUID_EDX 0x69746e65	52	#define AMD_CPUID_EDX 0x69746e65
54		53
55	#define INTEL_CPUID_EBX 0x756e6547	54	#define INTEL_CPUID_EBX 0x756e6547
56	#define INTEL_CPUID_ECX 0x6c65746e	55	#define INTEL_CPUID_ECX 0x6c65746e
57	#define INTEL_CPUID_EDX 0x49656e69	56	#define INTEL_CPUID_EDX 0x49656e69
58		57
59		58
60	enum vendor {	59	enum vendor {
61	VendorUnknown=0,	60	VendorUnknown=0,
62	VendorAMD,	61	VendorAMD,
63	VendorIntel	62	VendorIntel
64	};	63	};
65		64
66	static char *vendor_str[] = {	65	static char *vendor_str[] = {
67	"Unknown Vendor",	66	"Unknown Vendor",
68	"AuthenticAMD",	67	"AuthenticAMD",
69	"GenuineIntel"	68	"GenuineIntel"
70	};	69	};
71		70
72	void fpu_disable(void)	71	void fpu_disable(void)
73	{	72	{
74	asm volatile (	73	asm volatile (
75	"mov %%cr0,%%eax;"	74	"mov %%cr0,%%eax;"
76	"or $8,%%eax;"	75	"or $8,%%eax;"
77	"mov %%eax,%%cr0;"	76	"mov %%eax,%%cr0;"
78	:	77	:
79	:	78	:
80	:"%eax"	79	:"%eax"
81	);	80	);
82	}	81	}
83		82
84	void fpu_enable(void)	83	void fpu_enable(void)
85	{	84	{
86	asm volatile (	85	asm volatile (
87	"mov %%cr0,%%eax;"	86	"mov %%cr0,%%eax;"
88	"and $0xffFFffF7,%%eax;"	87	"and $0xffFFffF7,%%eax;"
89	"mov %%eax,%%cr0;"	88	"mov %%eax,%%cr0;"
90	:	89	:
91	:	90	:
92	:"%eax"	91	:"%eax"
93	);	92	);
94	}	93	}
95		94
96	void cpu_arch_init(void)	95	void cpu_arch_init(void)
97	{	96	{
98	cpuid_feature_info fi;	97	cpuid_feature_info fi;
99	cpuid_extended_feature_info efi;	98	cpuid_extended_feature_info efi;
100	cpu_info_t info;	99	cpu_info_t info;
101	uint32_t help = 0;	100	uint32_t help = 0;
102		101
103	CPU->arch.tss = tss_p;	102	CPU->arch.tss = tss_p;
104	CPU->arch.tss->iomap_base = &CPU->arch.tss->iomap[0] - ((uint8_t *) CPU->arch.tss);	103	CPU->arch.tss->iomap_base = &CPU->arch.tss->iomap[0] - ((uint8_t *) CPU->arch.tss);
105		104
106	CPU->fpu_owner = NULL;	105	CPU->fpu_owner = NULL;
107		106
108	cpuid(1, &info);	107	cpuid(1, &info);
109		108
110	fi.word = info.cpuid_edx;	109	fi.word = info.cpuid_edx;
111	efi.word = info.cpuid_ecx;	110	efi.word = info.cpuid_ecx;
112		111
113	if (fi.bits.fxsr)	112	if (fi.bits.fxsr)
114	fpu_fxsr();	113	fpu_fxsr();
115	else	114	else
116	fpu_fsr();	115	fpu_fsr();
117		116
118	if (fi.bits.sse) {	117	if (fi.bits.sse) {
119	asm volatile (	118	asm volatile (
120	"mov %%cr4,%0\n"	119	"mov %%cr4,%0\n"
121	"or %1,%0\n"	120	"or %1,%0\n"
122	"mov %0,%%cr4\n"	121	"mov %0,%%cr4\n"
123	: "+r" (help)	122	: "+r" (help)
124	: "i" (CR4_OSFXSR_MASK\|(1<<10))	123	: "i" (CR4_OSFXSR_MASK\|(1<<10))
125	);	124	);
126	}	125	}
127	}	126	}
128		127
129	void cpu_identify(void)	128	void cpu_identify(void)
130	{	129	{
131	cpu_info_t info;	130	cpu_info_t info;
132		131
133	CPU->arch.vendor = VendorUnknown;	132	CPU->arch.vendor = VendorUnknown;
134	if (has_cpuid()) {	133	if (has_cpuid()) {
135	cpuid(0, &info);	134	cpuid(0, &info);
136		135
137	/*	136	/*
138	* Check for AMD processor.	137	* Check for AMD processor.
139	*/	138	*/
140	if (info.cpuid_ebx==AMD_CPUID_EBX && info.cpuid_ecx==AMD_CPUID_ECX && info.cpuid_edx==AMD_CPUID_EDX) {	139	if (info.cpuid_ebx==AMD_CPUID_EBX && info.cpuid_ecx==AMD_CPUID_ECX && info.cpuid_edx==AMD_CPUID_EDX) {
141	CPU->arch.vendor = VendorAMD;	140	CPU->arch.vendor = VendorAMD;
142	}	141	}
143		142
144	/*	143	/*
145	* Check for Intel processor.	144	* Check for Intel processor.
146	*/	145	*/
147	if (info.cpuid_ebx==INTEL_CPUID_EBX && info.cpuid_ecx==INTEL_CPUID_ECX && info.cpuid_edx==INTEL_CPUID_EDX) {	146	if (info.cpuid_ebx==INTEL_CPUID_EBX && info.cpuid_ecx==INTEL_CPUID_ECX && info.cpuid_edx==INTEL_CPUID_EDX) {
148	CPU->arch.vendor = VendorIntel;	147	CPU->arch.vendor = VendorIntel;
149	}	148	}
150		149
151	cpuid(1, &info);	150	cpuid(1, &info);
152	CPU->arch.family = (info.cpuid_eax>>8)&0xf;	151	CPU->arch.family = (info.cpuid_eax>>8)&0xf;
153	CPU->arch.model = (info.cpuid_eax>>4)&0xf;	152	CPU->arch.model = (info.cpuid_eax>>4)&0xf;
154	CPU->arch.stepping = (info.cpuid_eax>>0)&0xf;	153	CPU->arch.stepping = (info.cpuid_eax>>0)&0xf;
155	}	154	}
156	}	155	}
157		156
158	void cpu_print_report(cpu_t* m)	157	void cpu_print_report(cpu_t* m)
159	{	158	{
160	printf("cpu%d: (%s family=%d model=%d stepping=%d) %dMHz\n",	159	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,	160	m->id, vendor_str[m->arch.vendor], m->arch.family, m->arch.model, m->arch.stepping,
162	m->frequency_mhz);	161	m->frequency_mhz);
163	}	162	}
164		163
165	/** @}	164	/** @}
166	*/	165	*/
167		166

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ia32/src/cpu/cpu.c – Rev 2082 → 2089