Started rewrite

3 files changed, 0 insertions, 159 deletions

diff --git a/src/kernel/gdt/gdt.asm b/src/kernel/gdt/gdt.asm
deleted file mode 100644
index 51ce444..0000000
--- a/src/kernel/gdt/gdt.asm
+++ /dev/null
@@ -1,14 +0,0 @@
-; GDT flush function
-global gdt_flush
-extern gp
-gdt_flush:
-    lgdt [gp]
-    mov ax, 0x10 ; Data segment offset of GDT
-    mov ds, ax
-    mov es, ax
-    mov fs, ax
-    mov gs, ax
-    mov ss, ax
-    jmp 0x08:flush ; Code segment offset
-flush:
-    ret ; Returns to C code
\ No newline at end of file
diff --git a/src/kernel/gdt/gdt.c b/src/kernel/gdt/gdt.c
deleted file mode 100644
index f201f19..0000000
--- a/src/kernel/gdt/gdt.c
+++ /dev/null
@@ -1,128 +0,0 @@
-#include <gdt/gdt.h>
-#include <lib/lib.h>
-#include <memory/alloc.h>
-#include <stdint.h>
-#include <system.h>
-
-struct gdt_entry {
-	u16 limit_low;
-	u16 base_low;
-	u8 base_middle;
-	u8 access;
-	u8 granularity;
-	u8 base_high;
-} __attribute__((packed));
-
-struct gdt_ptr {
-	u16 limit;
-	void *base;
-} __attribute__((packed));
-
-struct gdt_entry gdt[6];
-struct gdt_ptr gp;
-
-struct tss_entry_struct {
-	u32 prev_tss;
-	u32 esp0;
-	u32 ss0;
-	u32 esp1;
-	u32 ss1;
-	u32 esp2;
-	u32 ss2;
-	u32 cr3;
-	u32 eip;
-	u32 eflags;
-	u32 eax;
-	u32 ecx;
-	u32 edx;
-	u32 ebx;
-	u32 esp;
-	u32 ebp;
-	u32 esi;
-	u32 edi;
-	u32 es;
-	u32 cs;
-	u32 ss;
-	u32 ds;
-	u32 fs;
-	u32 gs;
-	u32 ldt;
-	u16 trap;
-	u16 iomap_base;
-} __attribute__((packed));
-
-struct tss_entry_struct tss_entry;
-
-extern void gdt_flush();
-
-void gdt_set_gate(s32 num, u32 base, u32 limit, u8 access, u8 gran)
-{
-	// Set descriptor base address
-	gdt[num].base_low = (u16)(base & 0xFFFF);
-	gdt[num].base_middle = (u8)((base >> 16) & 0xFF);
-	gdt[num].base_high = (u8)((base >> 24) & 0xFF);
-	gdt[num].limit_low = (u16)(limit & 0xFFFF);
-
-	// Set granularity and access flags
-	gdt[num].granularity = (u8)((limit >> 16) & 0x0F);
-	gdt[num].granularity |= (gran & 0xF0);
-	gdt[num].access = access;
-}
-
-extern u32 stack_hold;
-
-void gdt_install()
-{
-	// Set GDT pointer and limit
-	gp.limit = (sizeof(struct gdt_entry) * 6) - 1;
-	gp.base = &gdt;
-
-	// NULL descriptor
-	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);
-
-	// User mode code segment
-	gdt_set_gate(3, 0, 0xFFFFFFFF, 0xFA, 0xCF);
-
-	// User mode data segment
-	gdt_set_gate(4, 0, 0xFFFFFFFF, 0xF2, 0xCF);
-
-	// Write TSS
-	tss_write(5, 0x10, stack_hold);
-
-	// Remove old GDT and install the new changes!
-	gdt_flush();
-	tss_flush();
-
-	info("Installed Global Descriptor Table");
-}
-
-void tss_write(s32 num, u16 ss0, u32 esp0)
-{
-	u32 base = (u32)&tss_entry;
-	u32 limit = base + sizeof(tss_entry);
-
-	gdt_set_gate(num, base, limit, 0xE9, 0x00);
-
-	memset(&tss_entry, 0, sizeof(tss_entry));
-
-	tss_entry.ss0 = ss0;
-	tss_entry.esp0 = esp0;
-	tss_entry.cs = 0x0b;
-	tss_entry.ss = tss_entry.ds = tss_entry.es = tss_entry.fs = tss_entry.gs = 0x13;
-}
-
-void tss_flush()
-{
-	asm volatile("ltr %%ax" : : "a"(0x2B));
-}
-
-void set_kernel_stack(u32 stack)
-{
-	tss_entry.esp0 = stack;
-}
\ No newline at end of file
diff --git a/src/kernel/gdt/gdt.h b/src/kernel/gdt/gdt.h
deleted file mode 100644
index 36d6744..0000000
--- a/src/kernel/gdt/gdt.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef MELVIX_GDT_H
-#define MELVIX_GDT_H
-
-#include <stdint.h>
-
-/**
- * Installs the Global Descriptor Table
- */
-void gdt_install();
-
-void tss_write(s32 num, u16 ss0, u32 esp0);
-
-void tss_flush();
-
-void set_kernel_stack(u32 stack);
-
-#endif
\ No newline at end of file