diff options
Diffstat (limited to 'i386')
| -rw-r--r-- | i386/i386/locore.S | 6 | ||||
| -rw-r--r-- | i386/i386/locore.h | 34 |
2 files changed, 40 insertions, 0 deletions
diff --git a/i386/i386/locore.S b/i386/i386/locore.S index db8fb18..300c8c3 100644 --- a/i386/i386/locore.S +++ b/i386/i386/locore.S @@ -1136,6 +1136,11 @@ syscall_addr: jmp _take_trap /* treat as a trap */ + .data +DATA(cpu_features) + .long 0 + .text + /* Discover what kind of cpu we have; return the family number (3, 4, 5, 6, for 386, 486, 586, 686 respectively). */ ENTRY(discover_x86_cpu_type) @@ -1172,6 +1177,7 @@ ENTRY(discover_x86_cpu_type) use it to find out what we are. */ 0: movl $1,%eax /* Fetch CPU type info ... */ cpuid /* ... into eax */ + movl %edx,cpu_features /* Keep a copy */ shrl $8,%eax /* Slide family bits down */ andl $15,%eax /* And select them */ diff --git a/i386/i386/locore.h b/i386/i386/locore.h index ca3467d..24aef2e 100644 --- a/i386/i386/locore.h +++ b/i386/i386/locore.h @@ -34,5 +34,39 @@ extern int copyoutmsg (vm_offset_t kernelbuf, vm_offset_t userbuf, size_t cn); extern int call_continuation (continuation_t continuation); +extern unsigned int cpu_features[1]; + +#define CPU_FEATURE_FPU 0 +#define CPU_FEATURE_VME 1 +#define CPU_FEATURE_DE 2 +#define CPU_FEATURE_PSE 3 +#define CPU_FEATURE_TSC 4 +#define CPU_FEATURE_MSR 5 +#define CPU_FEATURE_PAE 6 +#define CPU_FEATURE_MCE 7 +#define CPU_FEATURE_CX8 8 +#define CPU_FEATURE_APIC 9 +#define CPU_FEATURE_SEP 11 +#define CPU_FEATURE_MTRR 12 +#define CPU_FEATURE_PGE 13 +#define CPU_FEATURE_MCA 14 +#define CPU_FEATURE_CMOV 15 +#define CPU_FEATURE_PAT 16 +#define CPU_FEATURE_PSE_36 17 +#define CPU_FEATURE_PSN 18 +#define CPU_FEATURE_CFLSH 19 +#define CPU_FEATURE_DS 21 +#define CPU_FEATURE_ACPI 22 +#define CPU_FEATURE_MMX 23 +#define CPU_FEATURE_FXSR 24 +#define CPU_FEATURE_SSE 25 +#define CPU_FEATURE_SSE2 26 +#define CPU_FEATURE_SS 27 +#define CPU_FEATURE_HTT 28 +#define CPU_FEATURE_TM 29 +#define CPU_FEATURE_PBE 31 + +#define CPU_HAS_FEATURE(feature) (cpu_feature[(feature) / 32] & (1 << ((feature) % 32))) + #endif /* _MACHINE__LOCORE_H_ */ |