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