diff options
Diffstat (limited to 'kernel/include/boot/gdt.h')
| -rw-r--r-- | kernel/include/boot/gdt.h | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/kernel/include/boot/gdt.h b/kernel/include/boot/gdt.h index b07d64d..7cf7d35 100644 --- a/kernel/include/boot/gdt.h +++ b/kernel/include/boot/gdt.h @@ -19,6 +19,8 @@ #ifndef __boot_gdt_h #define __boot_gdt_h +#include <stdint.h> + /* Access Flags: * 7 PRESENT * 6 PRIVILEGE @@ -38,14 +40,20 @@ #define READABLE_WRITABLE(x) (x << 1) #define ACCESSED(x) x -#define KERNEL_CODE_SEGMENT_ACCESS_FLAGS \ - PRESENT(1) | PRIVILEGE(0) | TYPE(1) | EXECUTABLE(1) \ +#define CODE_SEGMENT_ACCESS_FLAGS(privilege) \ + PRESENT(1) | PRIVILEGE(privilege) | TYPE(1) | EXECUTABLE(1) \ | DIRECTION_CONFORMING(0) | READABLE_WRITABLE(1) | ACCESSED(0) -#define KERNEL_DATA_SEGMENT_ACCESS_FLAGS \ - PRESENT(1) | PRIVILEGE(0) | TYPE(1) | EXECUTABLE(0) \ +#define DATA_SEGMENT_ACCESS_FLAGS(privilege) \ + PRESENT(1) | PRIVILEGE(privilege) | TYPE(1) | EXECUTABLE(0) \ | DIRECTION_CONFORMING(0) | READABLE_WRITABLE(1) | ACCESSED(0) +#define KERNEL_CODE_SEGMENT_ACCESS_FLAGS CODE_SEGMENT_ACCESS_FLAGS(0) +#define KERNEL_DATA_SEGMENT_ACCESS_FLAGS DATA_SEGMENT_ACCESS_FLAGS(0) + +#define USER_CODE_SEGMENT_ACCESS_FLAGS CODE_SEGMENT_ACCESS_FLAGS(3) +#define USER_DATA_SEGMENT_ACCESS_FLAGS DATA_SEGMENT_ACCESS_FLAGS(3) + /* Other Flags: * 3 GRANULARITY * 2 SIZE @@ -92,7 +100,7 @@ typedef struct { GDT_entry *ptr; /* Address of GDT */ } __attribute__((packed)) GDT_descriptor; -/* TODO: Implement GDT_load() */ -void __attribute((cdecl)) GDT_load(void); +extern void _GDT_flush(GDT_descriptor *); +void GDT_load(void); #endif |