diff options
Diffstat (limited to 'kernel/gdt.c')
| -rw-r--r-- | kernel/gdt.c | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/kernel/gdt.c b/kernel/gdt.c deleted file mode 100644 index 36a0cda..0000000 --- a/kernel/gdt.c +++ /dev/null @@ -1,34 +0,0 @@ -#include "gdt.h" - -static void gdt_set_gate(int idx, uint32_t base, uint32_t limit, uint8_t access, uint8_t gran) -{ - /* Setup the descriptor base address */ - gdt[idx].base_low = (base & 0xFFFF); - gdt[idx].base_middle = (base >> 16) & 0xFF; - gdt[idx].base_high = (base >> 24) & 0xFF; - - /* Setup the descriptor limits */ - gdt[idx].limit_low = (limit & 0xFFFF); - gdt[idx].granularity = ((limit >> 16) & 0x0F); - - /* Finally, set up the granularity and access flags */ - gdt[idx].granularity |= (gran & 0xF0); - gdt[idx].access = access; -} - -void gdt_init(void) -{ - gp.limit = sizeof(gdt) - 1; - gp.base = (uint32_t)&gdt; - - /* null segment */ - gdt_set_gate(0, 0, 0, 0, 0); - - /* code segment */ - gdt_set_gate(1, 0, 0xFFFFFFFF, 0x9A, 0xCF); - - /* data segment */ - gdt_set_gate(2, 0, 0xFFFFFFFF, 0x92, 0xCF); - - gdt_flush((uint32_t)&gp); -} |