diff options
| author | Ian Moffett <ian@osmora.org> | 2025-08-12 23:09:45 -0400 |
|---|---|---|
| committer | Ian Moffett <ian@osmora.org> | 2025-08-12 23:09:45 -0400 |
| commit | 466e8e091704c2b5ef1003c36b9538a61e037f6d (patch) | |
| tree | ba3143a521124a1a6e4c4c3061a7cf4c5cb49089 /sys | |
| parent | 39c2c3c8de8b2f3a18315e2001eac05fe52c0956 (diff) | |
kernel/amd64: Add CR4 bit definitions
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/include/arch/amd64/asm.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sys/include/arch/amd64/asm.h b/sys/include/arch/amd64/asm.h index 8d2c812..aca49d2 100644 --- a/sys/include/arch/amd64/asm.h +++ b/sys/include/arch/amd64/asm.h @@ -34,6 +34,16 @@ #include <sys/param.h> #include <machine/msr.h> +/* CR4 bits */ +#define CR4_TSD BIT(2) /* Timestamp disable */ +#define CR4_DE BIT(3) /* Debugging extensions */ +#define CR4_PSE BIT(4) /* Page size extensions */ +#define CR4_PCE BIT(8) /* Performance monitoring counter enable */ +#define CR4_UMIP BIT(11) /* User mode instruction prevention */ +#define CR4_LA57 BIT(12) /* Level 5 paging enable */ +#define CR4_VMXE BIT(13) /* Virtual machine extensions enable */ +#define CR4_SMXE BIT(14) /* Safer mode extensions enable */ + /* * Contains information for the current * core. Stored in %GS. |