diff options
Diffstat (limited to 'src/arch/x86/include')
| -rw-r--r-- | src/arch/x86/include/bits/errfile.h | 1 | ||||
| -rw-r--r-- | src/arch/x86/include/ipxe/cpuid.h | 25 |
2 files changed, 26 insertions, 0 deletions
diff --git a/src/arch/x86/include/bits/errfile.h b/src/arch/x86/include/bits/errfile.h index bfd223853..d9cf5c45f 100644 --- a/src/arch/x86/include/bits/errfile.h +++ b/src/arch/x86/include/bits/errfile.h @@ -46,6 +46,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); #define ERRFILE_timer_bios ( ERRFILE_ARCH | ERRFILE_DRIVER | 0x00010000 ) #define ERRFILE_cpuid_cmd ( ERRFILE_ARCH | ERRFILE_OTHER | 0x00000000 ) +#define ERRFILE_cpuid_settings ( ERRFILE_ARCH | ERRFILE_OTHER | 0x00010000 ) /** @} */ diff --git a/src/arch/x86/include/ipxe/cpuid.h b/src/arch/x86/include/ipxe/cpuid.h index 9705137c6..2f78dfca1 100644 --- a/src/arch/x86/include/ipxe/cpuid.h +++ b/src/arch/x86/include/ipxe/cpuid.h @@ -30,6 +30,9 @@ struct x86_features { /** CPUID support flag */ #define CPUID_FLAG 0x00200000UL +/** CPUID extended function */ +#define CPUID_EXTENDED 0x80000000UL + /** Get vendor ID and largest standard function */ #define CPUID_VENDOR_ID 0x00000000UL @@ -48,6 +51,28 @@ struct x86_features { /** Get extended features */ #define CPUID_AMD_FEATURES 0x80000001UL +/** Get CPU model */ +#define CPUID_MODEL 0x80000002UL + +/** + * Issue CPUID instruction + * + * @v operation CPUID operation + * @v eax Output via %eax + * @v ebx Output via %ebx + * @v ecx Output via %ecx + * @v edx Output via %edx + */ +static inline __attribute__ (( always_inline )) void +cpuid ( uint32_t operation, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, + uint32_t *edx ) { + + __asm__ ( "cpuid" + : "=a" ( *eax ), "=b" ( *ebx ), "=c" ( *ecx ), "=d" ( *edx ) + : "0" ( operation ) ); +} + +extern int cpuid_is_supported ( void ); extern void x86_features ( struct x86_features *features ); #endif /* _IPXE_CPUID_H */ |