WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ia32/include/cpuid.h


/*
 * 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
 */
 
#ifndef __ia32_CPUID_H__
#define __ia32_CPUID_H__
 
#include <arch/types.h>
 
struct cpu_info {
    uint32_t cpuid_eax;
    uint32_t cpuid_ebx;
    uint32_t cpuid_ecx;
    uint32_t cpuid_edx;
} __attribute__ ((packed));
 
struct __cpuid_extended_feature_info {
    unsigned sse3 :  1;
    unsigned      : 31;
} __attribute__ ((packed));
 
typedef union cpuid_extended_feature_info
{
    struct __cpuid_extended_feature_info bits;
    uint32_t                                word;
}cpuid_extended_feature_info;
 
 
struct __cpuid_feature_info {
    unsigned            : 23;
    unsigned mmx  :  1;
    unsigned fxsr :  1;
    unsigned sse  :  1;
    unsigned sse2 :  1;
    unsigned      :  5;
} __attribute__ ((packed));
 
typedef union cpuid_feature_info
{
    struct __cpuid_feature_info bits;
    uint32_t                word       ;
}cpuid_feature_info;
 
 
static inline uint32_t has_cpuid(void)
{
    uint32_t val, ret;
   
    __asm__ volatile (
        "pushf\n"               /* read flags */
        "popl %0\n"
        "movl %0, %1\n"
       
        "btcl $21, %1\n"        /* swap the ID bit */
       
        "pushl %1\n"            /* propagate the change into flags */
        "popf\n"
        "pushf\n"
        "popl %1\n"
       
        "andl $(1 << 21), %0\n" /* interrested only in ID bit */
        "andl $(1 << 21), %1\n"
        "xorl %1, %0\n"
        : "=r" (ret), "=r" (val)
    );
   
    return ret;
}
 
static inline void cpuid(uint32_t cmd, struct cpu_info *info)
{
    __asm__ volatile (
        "movl %4, %%eax\n"
        "cpuid\n"
       
        "movl %%eax, %0\n"
        "movl %%ebx, %1\n"
        "movl %%ecx, %2\n"
        "movl %%edx, %3\n"
        : "=m" (info->cpuid_eax), "=m" (info->cpuid_ebx), "=m" (info->cpuid_ecx), "=m" (info->cpuid_edx)
        : "m" (cmd)
        : "eax", "ebx", "ecx", "edx"
    );
}
 
#endif
 
/** @}
 */
 
 

Rev 1731	Rev 1780
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	#ifndef __ia32_CPUID_H__	35	#ifndef __ia32_CPUID_H__
36	#define __ia32_CPUID_H__	36	#define __ia32_CPUID_H__
37		37
38	#include <arch/types.h>	38	#include <arch/types.h>
39		39
40	struct cpu_info {	40	struct cpu_info {
41	__u32 cpuid_eax;	41	uint32_t cpuid_eax;
42	__u32 cpuid_ebx;	42	uint32_t cpuid_ebx;
43	__u32 cpuid_ecx;	43	uint32_t cpuid_ecx;
44	__u32 cpuid_edx;	44	uint32_t cpuid_edx;
45	} __attribute__ ((packed));	45	} __attribute__ ((packed));
46		46
47	struct __cpuid_extended_feature_info {	47	struct __cpuid_extended_feature_info {
48	unsigned sse3 : 1;	48	unsigned sse3 : 1;
49	unsigned : 31;	49	unsigned : 31;
50	} __attribute__ ((packed));	50	} __attribute__ ((packed));
51		51
52	typedef union cpuid_extended_feature_info	52	typedef union cpuid_extended_feature_info
53	{	53	{
54	struct __cpuid_extended_feature_info bits;	54	struct __cpuid_extended_feature_info bits;
55	__u32 word;	55	uint32_t word;
56	}cpuid_extended_feature_info;	56	}cpuid_extended_feature_info;
57		57
58		58
59	struct __cpuid_feature_info {	59	struct __cpuid_feature_info {
60	unsigned : 23;	60	unsigned : 23;
61	unsigned mmx : 1;	61	unsigned mmx : 1;
62	unsigned fxsr : 1;	62	unsigned fxsr : 1;
63	unsigned sse : 1;	63	unsigned sse : 1;
64	unsigned sse2 : 1;	64	unsigned sse2 : 1;
65	unsigned : 5;	65	unsigned : 5;
66	} __attribute__ ((packed));	66	} __attribute__ ((packed));
67		67
68	typedef union cpuid_feature_info	68	typedef union cpuid_feature_info
69	{	69	{
70	struct __cpuid_feature_info bits;	70	struct __cpuid_feature_info bits;
71	__u32 word ;	71	uint32_t word ;
72	}cpuid_feature_info;	72	}cpuid_feature_info;
73		73
74		74
75	static inline __u32 has_cpuid(void)	75	static inline uint32_t has_cpuid(void)
76	{	76	{
77	__u32 val, ret;	77	uint32_t val, ret;
78		78
79	__asm__ volatile (	79	__asm__ volatile (
80	"pushf\n" /* read flags */	80	"pushf\n" /* read flags */
81	"popl %0\n"	81	"popl %0\n"
82	"movl %0, %1\n"	82	"movl %0, %1\n"
83		83
84	"btcl $21, %1\n" /* swap the ID bit */	84	"btcl $21, %1\n" /* swap the ID bit */
85		85
86	"pushl %1\n" /* propagate the change into flags */	86	"pushl %1\n" /* propagate the change into flags */
87	"popf\n"	87	"popf\n"
88	"pushf\n"	88	"pushf\n"
89	"popl %1\n"	89	"popl %1\n"
90		90
91	"andl $(1 << 21), %0\n" /* interrested only in ID bit */	91	"andl $(1 << 21), %0\n" /* interrested only in ID bit */
92	"andl $(1 << 21), %1\n"	92	"andl $(1 << 21), %1\n"
93	"xorl %1, %0\n"	93	"xorl %1, %0\n"
94	: "=r" (ret), "=r" (val)	94	: "=r" (ret), "=r" (val)
95	);	95	);
96		96
97	return ret;	97	return ret;
98	}	98	}
99		99
100	static inline void cpuid(__u32 cmd, struct cpu_info *info)	100	static inline void cpuid(uint32_t cmd, struct cpu_info *info)
101	{	101	{
102	__asm__ volatile (	102	__asm__ volatile (
103	"movl %4, %%eax\n"	103	"movl %4, %%eax\n"
104	"cpuid\n"	104	"cpuid\n"
105		105
106	"movl %%eax, %0\n"	106	"movl %%eax, %0\n"
107	"movl %%ebx, %1\n"	107	"movl %%ebx, %1\n"
108	"movl %%ecx, %2\n"	108	"movl %%ecx, %2\n"
109	"movl %%edx, %3\n"	109	"movl %%edx, %3\n"
110	: "=m" (info->cpuid_eax), "=m" (info->cpuid_ebx), "=m" (info->cpuid_ecx), "=m" (info->cpuid_edx)	110	: "=m" (info->cpuid_eax), "=m" (info->cpuid_ebx), "=m" (info->cpuid_ecx), "=m" (info->cpuid_edx)
111	: "m" (cmd)	111	: "m" (cmd)
112	: "eax", "ebx", "ecx", "edx"	112	: "eax", "ebx", "ecx", "edx"
113	);	113	);
114	}	114	}
115		115
116	#endif	116	#endif
117		117
118	/** @}	118	/** @}
119	*/	119	*/
120		120
121		121

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia32/include/cpuid.h – Rev 1731 → 1780