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[cmdline] Add "cpuid" command

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Allow x86 CPU feature flags (such as support for 64-bit mode) to be
checked using the "cpuid" command.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2012-06-06 16:08:24 +01:00
parent 1050135159
commit 591541af66
9 changed files with 310 additions and 161 deletions
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6
src/arch/x86/include/bits/errfile.h
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@@ -38,8 +38,10 @@ FILE_LICENCE ( GPL2_OR_LATER );
#define ERRFILE_undionly ( ERRFILE_ARCH | ERRFILE_NET | 0x00030000 )
#define ERRFILE_undirom ( ERRFILE_ARCH | ERRFILE_NET | 0x00040000 )
#define ERRFILE_timer_rdtsc ( ERRFILE_ARCH | ERRFILE_DRIVER | 0x00000000 )
#define ERRFILE_timer_bios ( ERRFILE_ARCH | ERRFILE_DRIVER | 0x00010000 )
#define ERRFILE_timer_rdtsc ( ERRFILE_ARCH | ERRFILE_DRIVER | 0x00000000 )
#define ERRFILE_timer_bios ( ERRFILE_ARCH | ERRFILE_DRIVER | 0x00010000 )
#define ERRFILE_cpuid_cmd ( ERRFILE_ARCH | ERRFILE_OTHER | 0x00000000 )
/** @} */

53
src/arch/x86/include/ipxe/cpuid.h Normal file
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@@ -0,0 +1,53 @@
#ifndef _IPXE_CPUID_H
#define _IPXE_CPUID_H
/** @file
*
* x86 CPU feature detection
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
/** An x86 CPU feature register set */
struct x86_feature_registers {
/** Features returned via %ecx */
uint32_t ecx;
/** Features returned via %edx */
uint32_t edx;
};
/** x86 CPU features */
struct x86_features {
/** Intel-defined features (%eax=0x00000001) */
struct x86_feature_registers intel;
/** AMD-defined features (%eax=0x80000001) */
struct x86_feature_registers amd;
};
/** CPUID support flag */
#define CPUID_FLAG 0x00200000UL
/** Get vendor ID and largest standard function */
#define CPUID_VENDOR_ID 0x00000000UL
/** Get standard features */
#define CPUID_FEATURES 0x00000001UL
/** Get largest extended function */
#define CPUID_AMD_MAX_FN 0x80000000UL
/** Extended function existence check */
#define CPUID_AMD_CHECK 0x80000000UL
/** Extended function existence check mask */
#define CPUID_AMD_CHECK_MASK 0xffff0000UL
/** Get extended features */
#define CPUID_AMD_FEATURES 0x80000001UL
extern void x86_features ( struct x86_features *features );
#endif /* _IPXE_CPUID_H */