void init_gdtidt()
{
struct GDT *gdt=(struct GDT *)(0x00270000);
struct IDT *idt=(struct IDT *)(0x0026f800);
int i;
for(i=0;i<8192;i++)
{
setgdt(gdt+i,0,0,0);
}
setgdt(gdt+1,0xffffffff ,0x00000000,0x4092);//entry.s main.c data 4GB空间的数据都能访问
setgdt(gdt+2,0x000fffff ,0x00000000,0x409a);//entry.S code
//setgdt(gdt+3,0x000fffff ,0x00280000,0x409a); //main.c code 0x7ffff=512kB
setgdt(gdt+3,0x000fffff ,0x00000000,0x409a);//entry.S code
load_gdtr(0xfff,0X00270000);//this is right
for(i=0;i<256;i++)
{
setidt(idt+i,0,0,0);
}
for(i=0;i<256;i++)
{
//setidt(idt+i,(int)asm_inthandler21,3*8,0x008e);//用printdebug显示之后，证明这一部分是写进去了
}
//setidt(idt+0x21,(int)asm_inthandler21-0x280000,3*8,0x008e);//用printdebug显示之后，证明这一部分是写进去了
load_idtr(0x7ff,0x0026f800);//this is right
return;
}
void init_gdtidt(void){
struct SEGMENT_DESCRIPTOR *gdt = (struct SEGMENT_DESCRIPTOR *)0x00270000;
struct GATE_DESCRIPTOR *idt= (struct GATE_DESCRIPTOR*)0x0026f800;
int i;
//gdt initialize
for(i=0; i<8192; i++){
set_segmdesc(gdt+i, 0, 0, 0);
}
set_segmdesc(gdt+1, 0xffffffff, 0x00000000, 0x4092);
set_segmdesc(gdt+2, 0x000fffff, 0x00000000, 0x409a);
set_segmdesc(gdt+3, 0x000fffff, 0x00280000, 0x409a);
load_gdtr(0xfff, 0x00270000);//??or 0xfff?
//idt initialize
for(i=0; i<256; i++){
set_gatedesc(idt+i, 0, 0, 0);
}
for(i=0; i<256; i++){
set_gatedesc(idt+i, (int)asm_inthandler21, 3*8, 0x008e);
}
set_gatedesc(idt+0x21, (int)asm_inthandler21-0x280000, 3*8, 0x008e);
set_gatedesc(idt+0x2c, (int)asm_inthandler2c, 2*8, AR_INTGATE32);
load_idtr(0x7ff, 0x0026f800);
return;
}
void init_gdtidt(void)
{
struct SEGMENT_DESCRIPTOR *gdt = (struct SEGMENT_DESCRIPTOR *) ADR_GDT;
struct GATE_DESCRIPTOR *idt = (struct GATE_DESCRIPTOR *) ADR_IDT;
int i;
/* initialize GDT */
for (i = 0; i < 8192; i++) {
set_segmdesc(gdt + i, 0, 0, 0);
}
set_segmdesc(gdt + 1, 0xffffffff, 0x00000000, 0x4092); // it represents all the memory that CPU can manage. limit = 4G
// 0x4092 0100 0000 10010010 -> 32-bit mode, system special, read and write, not execute
set_segmdesc(gdt + 2, 0x0007ffff, 0x00280000, 0x409a); // 512K, from 0x00280000, prepared for bootpack.hrb
// 0x409a -> 32-bit mode, system special(ring0), execute and read, not write
load_gdtr(0xffff, ADR_GDT); // with the help of assembly
/* initialize IDT */
for (i = 0; i < 256; i++) {
set_gatedesc(idt + i, 0, 0, 0);
}
load_idtr(0x7ff, ADR_IDT); // with the help of assembly
/* setting IDT */
set_gatedesc(idt + 0x21, (int) asm_inthandler21, 2 * 8, AR_INTGATE32);
set_gatedesc(idt + 0x2c, (int) asm_inthandler2c, 2 * 8, AR_INTGATE32);
set_gatedesc(idt + 0x27, (int) asm_inthandler27, 2 * 8, AR_INTGATE32);
return;
}
//初始化GDT、IDT
void init_gdtidt(void)
{
struct SEGMENT_DESCRIPTOR *gdt=(struct SEGMENT_DESCRIPTOR *)0x00270000;
struct GATE_DESCRIPTOR *idt=(struct GATE_DESCRIPTOR *)0x0026f800;
int i;
/*GDT的初始化*/
for(i=0;i<8192;i++){
set_segmdesc(gdt+i,0,0,0);
}
set_segmdesc(gdt+1,0xffffffff,0x00000000,AR_DATA32_RW);
set_segmdesc(gdt + 2, LIMIT_BOTPAK, ADR_BOTPAK, AR_CODE32_ER);
load_gdtr(LIMIT_GDT, ADR_GDT);
/*IDT的初始化*/
for(i=0;i<256;i++){
set_gatedesc(idt+i,0,0,0);
}
load_idtr(LIMIT_IDT, ADR_IDT);
/*IDT的设定*/
set_gatedesc(idt+0x21,(int)asm_inthandler21,2*8,AR_INTGATE32);
set_gatedesc(idt + 0x27, (int) asm_inthandler27, 2 * 8, AR_INTGATE32);
set_gatedesc(idt+0x2c,(int)asm_inthandler2c,2*8,AR_INTGATE32);
return ;
}
void init_gdtidt()
{
struct GDT *gdt=(struct GDT *)(0x00270000);
struct IDT *idt=(struct IDT *)(0x0026f800);
int i;
for(i=0;i<8192;i++)
{
setgdt(gdt+i,0,0,0);
}
setgdt(gdt+1,0xffffffff ,0x00000000,0x4092);//entry.s main.c data 4GB空间的数据都能访问
setgdt(gdt+2,0x000fffff ,0x00000000,0x409a);//entry.S code
setgdt(gdt+3,0x000fffff ,0x00280000,0x409a); //main.c code 0x7ffff=512kB
load_gdtr(0xfff,0X00270000);//this is right
for(i=0;i<256;i++)
{
setidt(idt+i,0,0,0);
}
for(i=0;i<256;i++)
{
setidt(idt+i,(int)asm_inthandler21,3*8,0x008e);//用printdebug显示之后，证明这一部分是写进去了
}
setidt(idt+0x20,(int)asm_inthandler20-0x280000,3*8,0x008e);//挂载timer interrrupt service 汇编程序
setidt(idt+0x21,(int)asm_inthandler21-0x280000,3*8,0x008e);//挂载keyboard interrupt service汇编程序
setidt(idt+0x2c,(int)asm_inthandler2c-0x280000,3*8,0x008e);//挂载mouse interrupt service汇编程序
// setidt(idt+0x21,(int)asm_inthandler21,2*8,0x008e);//挂载keyboard interrupt service
// setidt(idt+0x2c,(int)asm_inthandler2c,2*8,0x008e);//挂载mouse interrupt serv
//printdebug(asm_inthandler2c,0);
load_idtr(0x7ff,0x0026f800);//this is right
return;
}
//初始化GDT、IDT
void init_gdtidt(void)
{
struct SEGMENT_DESCRIPTOR *gdt=(struct SEGMENT_DESCRIPTOR *)0x00270000;
struct GATE_DESCRIPTOR *idt=(struct GATE_DESCRIPTOR *)0x0026f800;
int i;
/*GDT的初始化*/
for(i=0;i<8192;i++){
set_segmdesc(gdt+i,0,0,0);
}
set_segmdesc(gdt+1,0xffffffff,0x00000000,0x4092);
set_segmdesc(gdt+2,0x0007ffff,0x00280000,0x409a);
load_gdtr(0xffff,0x00270000);
/*IDT的初始化*/
for(i=0;i<256;i++){
set_gatedesc(idt+i,0,0,0);
}
load_idtr(0x7ff,0x0026800);
return ;
}
void init_gdtidt(void)
{
gdt = (struct SEGMENT_DESCRIPTOR *)memory_allocate(
(sizeof(struct SEGMENT_DESCRIPTOR) * NUM_GDT));
/* struct SEGMENT_DESCRIPTOR *gdt = (struct SEGMENT_DESCRIPTOR *)GDT_ADDR; */
/* struct GATE_DISCRIPTOR *idt = (struct GATE_DISCRIPTOR *) IDT_ADDR; */
idt = (struct GATE_DISCRIPTOR*)memory_allocate(
(sizeof(struct GATE_DISCRIPTOR) * NUM_IDT));
printf(TEXT_MODE_SCREEN_RIGHT, "idt: 0x%x", idt);
printf(TEXT_MODE_SCREEN_RIGHT, "gdt: 0x%x", gdt);
if(idt == NULL){
return;
}
int i;
//init GDT
for(i = 0; i < NUM_GDT; i++){
set_segmdesc(gdt + i, 0, 0, 0, 0, 0, 0, 0);
}
set_segmdesc(
gdt + CODE_SEGMENT_NUM, 0xffffffff, 0x00000000, 0, SEG_TYPE_CODE_XRC,
DESC_TYPE_SEGMENT, PRIVILEGE_LEVEL_OS, PRESENT);
set_segmdesc(
gdt + DATA_SEGMENT_NUM, 0xffffffff, 0x00000000, 0, SEG_TYPE_DATE_REW,
DESC_TYPE_SEGMENT, PRIVILEGE_LEVEL_OS, PRESENT);
/* load_gdtr(0xffff, (uintptr_t)gdt); */
load_gdtr(sizeof(struct SEGMENT_DESCRIPTOR)*4, (uintptr_t)gdt);
//init IDT
for(int i = 0; i < NUM_IDT; i++){
set_gatedesc(idt + i, (uintptr_t)io_hlt, 0, 0, 0, 0, 0);
/* set_gatedesc( */
/* idt + 0x20, (uintptr_t)asm_timer_inthandler, 1*8, GATE_TYPE_32BIT_INT, 0, */
/* PRIVILEGE_LEVEL_OS, PRESENT); */
}
/* for(int i = 0; i < 14; i++){ */
/* set_gatedesc( */
/* idt + i, (uintptr_t)asm_fault_inthandler2, 1*8, GATE_TYPE_32BIT_INT, 0, */
/* PRIVILEGE_LEVEL_OS, PRESENT); */
/* } */
/* for(int i = 14; i < 20; i++){ */
/* set_gatedesc( */
/* idt + i, (uintptr_t)asm_fault_inthandler, 1*8, GATE_TYPE_32BIT_INT, 0, */
/* PRIVILEGE_LEVEL_OS, PRESENT); */
/* } */
set_gatedesc(
idt + 13, (uintptr_t)asm_fault_inthandler2, CODE_SEGMENT_NUM*8,
GATE_TYPE_32BIT_INT, 0, PRIVILEGE_LEVEL_OS, PRESENT);
set_gatedesc(
idt + 8, (uintptr_t)asm_fault_inthandler, CODE_SEGMENT_NUM*8,
GATE_TYPE_32BIT_INT, 0, PRIVILEGE_LEVEL_OS, PRESENT);
/* load_idtr(IDT_LIMIT, (uintptr_t)idt); */
load_idtr(sizeof(struct GATE_DISCRIPTOR) * NUM_IDT, (uintptr_t)idt);
set_gatedesc(
idt + 0x20, (uintptr_t)asm_timer_inthandler, CODE_SEGMENT_NUM*8,
GATE_TYPE_32BIT_INT, 0, PRIVILEGE_LEVEL_OS, PRESENT);
set_gatedesc(
idt + 0x21, (uintptr_t)asm_inthandler21, CODE_SEGMENT_NUM*8,
GATE_TYPE_32BIT_INT, 0, PRIVILEGE_LEVEL_OS, PRESENT);
return;
}
