WebSVN – HelenOS – Diff – /tags/0.4.1/kernel/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 KERN_ia32_CPUID_H_
#define KERN_ia32_CPUID_H_
 
#define INTEL_CPUID_LEVEL     0x00000000
#define INTEL_CPUID_STANDARD  0x00000001
#define INTEL_PSE             3
#define INTEL_SEP             11
 
#ifndef __ASM__
 
#include <arch/types.h>
 
typedef struct {
    uint32_t cpuid_eax;
    uint32_t cpuid_ebx;
    uint32_t cpuid_ecx;
    uint32_t cpuid_edx;
} __attribute__ ((packed)) cpu_info_t;
 
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 %[ret]\n"
        "movl %[ret], %[val]\n"
       
        "btcl $21, %[val]\n"         /* swap the ID bit */
       
        "pushl %[val]\n"             /* propagate the change into flags */
        "popf\n"
        "pushf\n"
        "popl %[val]\n"
       
        "andl $(1 << 21), %[ret]\n"  /* interrested only in ID bit */
        "andl $(1 << 21), %[val]\n"
        "xorl %[val], %[ret]\n"
        : [ret] "=r" (ret), [val] "=r" (val)
    );
   
    return ret;
}
 
static inline void cpuid(uint32_t cmd, cpu_info_t *info)
{
    asm volatile (
        "cpuid\n"
        : "=a" (info->cpuid_eax), "=b" (info->cpuid_ebx),
          "=c" (info->cpuid_ecx), "=d" (info->cpuid_edx)
        : "a" (cmd)
    );
}
 
#endif /* !def __ASM__ */
#endif
 
/** @}
 */
 

Rev 4195	Rev 4687
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 KERN_ia32_CPUID_H_	35	#ifndef KERN_ia32_CPUID_H_
36	#define KERN_ia32_CPUID_H_	36	#define KERN_ia32_CPUID_H_
37		37
38	#define INTEL_CPUID_LEVEL 0x00000000	38	#define INTEL_CPUID_LEVEL 0x00000000
39	#define INTEL_CPUID_STANDARD 0x00000001	39	#define INTEL_CPUID_STANDARD 0x00000001
40	#define INTEL_PSE 3	40	#define INTEL_PSE 3
41	#define INTEL_SEP 11	41	#define INTEL_SEP 11
42		42
43	#ifndef __ASM__	43	#ifndef __ASM__
44		44
45	#include <arch/types.h>	45	#include <arch/types.h>
46		46
47	typedef struct {	47	typedef struct {
48	uint32_t cpuid_eax;	48	uint32_t cpuid_eax;
49	uint32_t cpuid_ebx;	49	uint32_t cpuid_ebx;
50	uint32_t cpuid_ecx;	50	uint32_t cpuid_ecx;
51	uint32_t cpuid_edx;	51	uint32_t cpuid_edx;
52	} __attribute__ ((packed)) cpu_info_t;	52	} __attribute__ ((packed)) cpu_info_t;
53		53
54	struct __cpuid_extended_feature_info {	54	struct __cpuid_extended_feature_info {
55	unsigned sse3 : 1;	55	unsigned sse3 : 1;
56	unsigned : 31;	56	unsigned : 31;
57	} __attribute__ ((packed));	57	} __attribute__ ((packed));
58		58
59	typedef union cpuid_extended_feature_info {	59	typedef union cpuid_extended_feature_info {
60	struct __cpuid_extended_feature_info bits;	60	struct __cpuid_extended_feature_info bits;
61	uint32_t word;	61	uint32_t word;
62	} cpuid_extended_feature_info;	62	} cpuid_extended_feature_info;
63		63
64	struct __cpuid_feature_info {	64	struct __cpuid_feature_info {
65	unsigned : 23;	65	unsigned : 23;
66	unsigned mmx : 1;	66	unsigned mmx : 1;
67	unsigned fxsr : 1;	67	unsigned fxsr : 1;
68	unsigned sse : 1;	68	unsigned sse : 1;
69	unsigned sse2 : 1;	69	unsigned sse2 : 1;
70	unsigned : 5;	70	unsigned : 5;
71	} __attribute__ ((packed));	71	} __attribute__ ((packed));
72		72
73	typedef union cpuid_feature_info {	73	typedef union cpuid_feature_info {
74	struct __cpuid_feature_info bits;	74	struct __cpuid_feature_info bits;
75	uint32_t word;	75	uint32_t word;
76	} cpuid_feature_info;	76	} cpuid_feature_info;
77		77
78		78
79	static inline uint32_t has_cpuid(void)	79	static inline uint32_t has_cpuid(void)
80	{	80	{
81	uint32_t val, ret;	81	uint32_t val, ret;
82		82
83	asm volatile (	83	asm volatile (
84	"pushf\n" /* read flags */	84	"pushf\n" /* read flags */
85	"popl %[ret]\n"	85	"popl %[ret]\n"
86	"movl %[ret], %[val]\n"	86	"movl %[ret], %[val]\n"
87		87
88	"btcl $21, %[val]\n" /* swap the ID bit */	88	"btcl $21, %[val]\n" /* swap the ID bit */
89		89
90	"pushl %[val]\n" /* propagate the change into flags */	90	"pushl %[val]\n" /* propagate the change into flags */
91	"popf\n"	91	"popf\n"
92	"pushf\n"	92	"pushf\n"
93	"popl %[val]\n"	93	"popl %[val]\n"
94		94
95	"andl $(1 << 21), %[ret]\n" /* interrested only in ID bit */	95	"andl $(1 << 21), %[ret]\n" /* interrested only in ID bit */
96	"andl $(1 << 21), %[val]\n"	96	"andl $(1 << 21), %[val]\n"
97	"xorl %[val], %[ret]\n"	97	"xorl %[val], %[ret]\n"
98	: [ret] "=r" (ret), [val] "=r" (val)	98	: [ret] "=r" (ret), [val] "=r" (val)
99	);	99	);
100		100
101	return ret;	101	return ret;
102	}	102	}
103		103
104	static inline void cpuid(uint32_t cmd, cpu_info_t *info)	104	static inline void cpuid(uint32_t cmd, cpu_info_t *info)
105	{	105	{
106	asm volatile (	106	asm volatile (
107	"cpuid\n"	107	"cpuid\n"
108	: "=a" (info->cpuid_eax), "=b" (info->cpuid_ebx),	108	: "=a" (info->cpuid_eax), "=b" (info->cpuid_ebx),
109	"=c" (info->cpuid_ecx), "=d" (info->cpuid_edx)	109	"=c" (info->cpuid_ecx), "=d" (info->cpuid_edx)
110	: "a" (cmd)	110	: "a" (cmd)
111	);	111	);
112	}	112	}
113		113
114	#endif /* !def __ASM__ */	114	#endif /* !def __ASM__ */
115	#endif	115	#endif
116		116
117	/** @}	117	/** @}
118	*/	118	*/
119		119

Subversion Repositories HelenOS

(root)/tags/0.4.1/kernel/arch/ia32/include/cpuid.h – Rev 4195 → 4687