diff options
Diffstat (limited to 'arch/i386/boot')
| -rw-r--r-- | arch/i386/boot/gdt.c | 29 |
1 files changed, 14 insertions, 15 deletions
diff --git a/arch/i386/boot/gdt.c b/arch/i386/boot/gdt.c index d9bfc1e..53853bb 100644 --- a/arch/i386/boot/gdt.c +++ b/arch/i386/boot/gdt.c @@ -1,4 +1,3 @@ -#include <kernel/io.h> #include <stdint.h> #define SEG_DESCTYPE(x) ((x) << 0x04) // Descriptor type (0 for system, 1 for code/data) @@ -26,21 +25,21 @@ #define SEG_CODE_EXRDC 0x0E // Execute/Read, conforming #define SEG_CODE_EXRDCA 0x0F // Execute/Read, conforming, accessed -#define GDT_CODE_PL0 SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \ - SEG_LONG(0) | SEG_SIZE(1) | SEG_GRAN(1) | \ - SEG_PRIV(0) | SEG_CODE_EXRD +#define GDT_CODE_PL0 (SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \ + SEG_LONG(0) | SEG_SIZE(1) | SEG_GRAN(1) | \ + SEG_PRIV(0) | SEG_CODE_EXRD) -#define GDT_DATA_PL0 SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \ - SEG_LONG(0) | SEG_SIZE(1) | SEG_GRAN(1) | \ - SEG_PRIV(0) | SEG_DATA_RDWR +#define GDT_DATA_PL0 (SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \ + SEG_LONG(0) | SEG_SIZE(1) | SEG_GRAN(1) | \ + SEG_PRIV(0) | SEG_DATA_RDWR) -#define GDT_CODE_PL3 SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \ - SEG_LONG(0) | SEG_SIZE(1) | SEG_GRAN(1) | \ - SEG_PRIV(3) | SEG_CODE_EXRD +#define GDT_CODE_PL3 (SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \ + SEG_LONG(0) | SEG_SIZE(1) | SEG_GRAN(1) | \ + SEG_PRIV(3) | SEG_CODE_EXRD) -#define GDT_DATA_PL3 SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \ - SEG_LONG(0) | SEG_SIZE(1) | SEG_GRAN(1) | \ - SEG_PRIV(3) | SEG_DATA_RDWR +#define GDT_DATA_PL3 (SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \ + SEG_LONG(0) | SEG_SIZE(1) | SEG_GRAN(1) | \ + SEG_PRIV(3) | SEG_DATA_RDWR) struct gpt_ptr { uint16_t limit; @@ -73,7 +72,7 @@ void gdt_install(void) { gp.base = (uint32_t)&desc; desc[0] = create_gdt_entry(0, 0, 0); - desc[1] = create_gdt_entry(0, 0x000FFFFF, (GDT_CODE_PL0)); - desc[2] = create_gdt_entry(0, 0x000FFFFF, (GDT_DATA_PL0)); + desc[1] = create_gdt_entry(0, 0x000FFFFF, GDT_CODE_PL0); + desc[2] = create_gdt_entry(0, 0x000FFFFF, GDT_DATA_PL0); flush_gdt(&gp); } |