1 files changed, 0 insertions, 72 deletions
diff --git a/cpu/gdt.c b/cpu/gdt.c
deleted file mode 100644
index 28853cf..0000000
--- a/cpu/gdt.c
+++ /dev/null
@@ -1,72 +0,0 @@
-#include "gdt.h"
-
-extern void flush_tss(void);
-extern void load_gdt(void *);
-
-typedef struct tss_entry_struct tss_entry_t;
-
-tss_entry_t tss_entry;
-
-typedef union {
-  struct GDT_Entry s;
-  uint64_t raw;
-} GDT_Entry;
-
-GDT_Entry gdt_entries[6] = {0};
-GDT_Pointer gdtr;
-
-extern uint32_t inital_esp;
-void write_tss(struct GDT_Entry *gdt_entry) {
-  uint32_t base = (uint32_t)&tss_entry;
-  uint32_t limit = sizeof(tss_entry);
-
-  gdt_entry->limit_low = limit;
-  gdt_entry->base_low = base;
-  gdt_entry->accessed = 1;
-  gdt_entry->read_write = 0;
-  gdt_entry->conforming_expand_down = 0;
-  gdt_entry->code = 1;
-  gdt_entry->code_data_segment = 0;
-  gdt_entry->DPL = 0;
-  gdt_entry->present = 1;
-  gdt_entry->limit_high = limit >> 16;
-  gdt_entry->available = 0;
-  gdt_entry->long_mode = 0;
-  gdt_entry->big = 0;
-  gdt_entry->gran = 0;
-  gdt_entry->base_high = (base & ((uint32_t)0xff << 24)) >> 24;
-
-  memset(&tss_entry, 0, sizeof tss_entry);
-  tss_entry.ss0 = GDT_KERNEL_DATA_SEGMENT * GDT_ENTRY_SIZE;
-  register uint32_t esp asm("esp");
-  tss_entry.esp0 = esp;
-}
-
-void gdt_init() {
-  gdt_entries[GDT_NULL_SEGMENT].raw = 0x0;
-  gdt_entries[GDT_KERNEL_CODE_SEGMENT].raw =
-      0xCF9A000000FFFF; // Kernel code segment
-  gdt_entries[GDT_KERNEL_DATA_SEGMENT].raw =
-      0xCF92000000FFFF; // Kernel data segment
-
-  // Usermode code segment
-  memcpy(&gdt_entries[GDT_USERMODE_CODE_SEGMENT],
-         &gdt_entries[GDT_KERNEL_CODE_SEGMENT], GDT_ENTRY_SIZE);
-
-  // Usermode data segment
-  memcpy(&gdt_entries[GDT_USERMODE_DATA_SEGMENT],
-         &gdt_entries[GDT_KERNEL_DATA_SEGMENT], GDT_ENTRY_SIZE);
-
-  // Set DPL to 3 to indicate that the segment is in ring 3
-  gdt_entries[GDT_USERMODE_CODE_SEGMENT].s.DPL = 3;
-  gdt_entries[GDT_USERMODE_DATA_SEGMENT].s.DPL = 3;
-
-  write_tss((struct GDT_Entry *)&gdt_entries[GDT_TSS_SEGMENT]);
-
-  gdtr.offset = (uint32_t)&gdt_entries;
-  gdtr.size = sizeof(gdt_entries) - 1;
-
-  asm("cli");
-  load_gdt(&gdtr);
-  flush_tss();
-}