| 38,21 → 38,45 |
|---|
| __u32 cpuid_edx; |
| } __attribute__ ((packed)); |
| |
| extern int has_cpuid(void); |
| static inline __u32 has_cpuid(void) |
| { |
| __u32 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(__u32 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" |
| ); |
| __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 |