diff options
Diffstat (limited to 'c/src/lib/libcpu/i386/registers.h')
| -rw-r--r-- | c/src/lib/libcpu/i386/registers.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/i386/registers.h b/c/src/lib/libcpu/i386/registers.h index 142516ca94..ab783fd329 100644 --- a/c/src/lib/libcpu/i386/registers.h +++ b/c/src/lib/libcpu/i386/registers.h @@ -58,6 +58,14 @@ #define CR0_PAGE_LEVEL_CACHE_DISABLE 0x40000000 #define CR0_PAGING 0x80000000 +/* + * definitions related to CR3 + */ + +#define CR3_PAGE_CACHE_DISABLE 0x10 +#define CR3_PAGE_WRITE_THROUGH 0x8 + + #ifndef ASM /* @@ -153,6 +161,23 @@ typedef union { unsigned int i; }cr0; +/* + * definition of cr3 registers has a bit field structure + */ +typedef struct { + + unsigned int : 3; + unsigned int page_write_transparent : 1; + unsigned int page_cache_disable : 1; + unsigned int : 7; + unsigned int page_directory_base :20; +}cr3_bits; + +typedef union { + cr3_bits cr3; + unsigned int i; +}cr3; + #endif #endif |