sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2026-01-13 09:29:04 +03:00
Code Issues Packages Projects Releases Wiki Activity

[cpuid] Provide cpuid_supported() to test for supported functions

Browse Source 
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2017-01-25 20:57:18 +00:00
parent 70fc25ad6e
commit d37e025b81
4 changed files with 72 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
src/arch/x86/include/bits/errfile.h
View File

@@ -25,6 +25,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#define ERRFILE_gdbmach ( ERRFILE_ARCH | ERRFILE_CORE | 0x000e0000 )
#define ERRFILE_rtc_entropy ( ERRFILE_ARCH | ERRFILE_CORE | 0x000f0000 )
#define ERRFILE_acpipwr ( ERRFILE_ARCH | ERRFILE_CORE | 0x00100000 )
#define ERRFILE_cpuid ( ERRFILE_ARCH | ERRFILE_CORE | 0x00110000 )
#define ERRFILE_bootsector ( ERRFILE_ARCH | ERRFILE_IMAGE | 0x00000000 )
#define ERRFILE_bzimage ( ERRFILE_ARCH | ERRFILE_IMAGE | 0x00010000 )

8
src/arch/x86/include/ipxe/cpuid.h
View File

@@ -60,22 +60,22 @@ struct x86_features {
/**
* Issue CPUID instruction
*
* @v operation CPUID operation
* @v function CPUID function
* @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,
cpuid ( uint32_t function, uint32_t *eax, uint32_t *ebx, uint32_t *ecx,
uint32_t *edx ) {
__asm__ ( "cpuid"
: "=a" ( *eax ), "=b" ( *ebx ), "=c" ( *ecx ), "=d" ( *edx )
: "0" ( operation ) );
: "0" ( function ) );
}
extern int cpuid_is_supported ( void );
extern int cpuid_supported ( uint32_t function );
extern void x86_features ( struct x86_features *features );
#endif /* _IPXE_CPUID_H */