鼠标键盘中断处理

06_day/bootpack.c

@@ -11,7 +11,8 @@ void HariMain(void)
 
 	init_gdtidt();
 	init_pic();
-	
+	io_sti(); /* IDT/PICの初期化が終わったのでCPUの割り込み禁止を解除 */
+
 	init_palette();
 	init_screen8(binfo->vram, binfo->scrnx, binfo->scrny);
 	mx = (binfo->scrnx - 16) / 2; /* 计算画面的中心坐标*/
@@ -21,6 +22,9 @@ void HariMain(void)
 	sprintf(s, "(%d, %d)", mx, my);
 	putfonts8_asc(binfo->vram, binfo->scrnx, 0, 0, COL8_FFFFFF, s);
 
+	io_out8(PIC0_IMR, 0xf9); /* PIC1とキーボードを許可(11111001) */
+	io_out8(PIC1_IMR, 0xef); /* マウスを許可(11101111) */
+
 	for (;;) {
 		io_hlt();
 	}

06_day/bootpack.h

@@ -12,11 +12,15 @@ struct BOOTINFO { /* 0x0ff0-0x0fff */
 /* naskfunc.nas */
 void io_hlt(void);
 void io_cli(void);
+void io_sti(void);
 void io_out8(int port, int data);
 int io_load_eflags(void);
 void io_store_eflags(int eflags);
 void load_gdtr(int limit, int addr);
 void load_idtr(int limit, int addr);
+void asm_inthandler21(void);
+void asm_inthandler27(void);
+void asm_inthandler2c(void);
 
 /* graphic.c */
 void init_palette(void);
@@ -67,9 +71,13 @@ void set_gatedesc(struct GATE_DESCRIPTOR *gd, int offset, int selector, int ar);
 #define LIMIT_BOTPAK	0x0007ffff
 #define AR_DATA32_RW	0x4092
 #define AR_CODE32_ER	0x409a
+#define AR_INTGATE32	0x008e
 
 /* int.c */
 void init_pic(void);
+void inthandler21(int *esp);
+void inthandler27(int *esp);
+void inthandler2c(int *esp);
 #define PIC0_ICW1		0x0020
 #define PIC0_OCW2		0x0020
 #define PIC0_IMR		0x0021
@@ -81,4 +89,4 @@ void init_pic(void);
 #define PIC1_IMR		0x00a1
 #define PIC1_ICW2		0x00a1
 #define PIC1_ICW3		0x00a1
-#define PIC1_ICW4		0x00a1
+#define PIC1_ICW4		0x00a1

06_day/dsctbl.c

@@ -9,7 +9,7 @@ void init_gdtidt(void)
 	int i;
 
 	/* GDT初始化 */
-	for (i = 0; i < 8192; i++) {
+	for (i = 0; i <= LIMIT_GDT / 8; i++) {
 		set_segmdesc(gdt + i, 0, 0, 0);
 	}
 	set_segmdesc(gdt + 1, 0xffffffff,   0x00000000, AR_DATA32_RW);
@@ -17,11 +17,16 @@ void init_gdtidt(void)
 	load_gdtr(LIMIT_GDT, ADR_GDT);
 
 	/* IDT初始化 */
-	for (i = 0; i < 256; i++) {
+	for (i = 0; i <= LIMIT_IDT / 8; i++) {
 		set_gatedesc(idt + i, 0, 0, 0);
 	}
 	load_idtr(LIMIT_IDT, ADR_IDT);
 
+	/* IDT设置*/
+	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;
 }
 

06_day/int.c

@@ -23,3 +23,36 @@ void init_pic(void)
 
 	return;
 }
+
+void inthandler21(int *esp)
+/* 来自PS/2键盘的中断 */
+{
+	struct BOOTINFO *binfo = (struct BOOTINFO *) ADR_BOOTINFO;
+	boxfill8(binfo->vram, binfo->scrnx, COL8_000000, 0, 0, 32 * 8 - 1, 15);
+	putfonts8_asc(binfo->vram, binfo->scrnx, 0, 0, COL8_FFFFFF, "INT 21 (IRQ-1) : PS/2 keyboard");
+	for (;;) {
+		io_hlt();
+	}
+}
+
+void inthandler2c(int *esp)
+/* 来自PS/2鼠标的中断 */
+{
+	struct BOOTINFO *binfo = (struct BOOTINFO *) ADR_BOOTINFO;
+	boxfill8(binfo->vram, binfo->scrnx, COL8_000000, 0, 0, 32 * 8 - 1, 15);
+	putfonts8_asc(binfo->vram, binfo->scrnx, 0, 0, COL8_FFFFFF, "INT 2C (IRQ-12) : PS/2 mouse");
+	for (;;) {
+		io_hlt();
+	}
+}
+
+void inthandler27(int *esp)
+/* PIC0中断的不完整策略 */
+/* 这个中断在Athlon64X2上通过芯片组提供的便利，只需执行一次 */
+/* 这个中断只是接收，不执行任何操作 */
+/* 为什么不处理？
+	→  因为这个中断可能是电气噪声引发的、只是处理一些重要的情况。*/
+{
+	io_out8(PIC0_OCW2, 0x67); /* 通知PIC的IRQ-07（参考7-1） */
+	return;
+}

06_day/naskfunc.nas

@@ -11,6 +11,8 @@
 		GLOBAL	_io_out8, _io_out16, _io_out32
 		GLOBAL	_io_load_eflags, _io_store_eflags
 		GLOBAL	_load_gdtr, _load_idtr
+		GLOBAL	_asm_inthandler21, _asm_inthandler27, _asm_inthandler2c
+		EXTERN	_inthandler21, _inthandler27, _inthandler2c
 
 [SECTION .text]
 
@@ -76,7 +78,7 @@ _io_store_eflags:	; void io_store_eflags(int eflags);
 		PUSH	EAX
 		POPFD		; POP EFLAGS 
 		RET
-		
+
 _load_gdtr:		; void load_gdtr(int limit, int addr);
 		MOV		AX,[ESP+4]		; limit
 		MOV		[ESP+6],AX
@@ -87,4 +89,52 @@ _load_idtr:		; void load_idtr(int limit, int addr);
 		MOV		AX,[ESP+4]		; limit
 		MOV		[ESP+6],AX
 		LIDT	[ESP+6]
-		RET
+		RET
+
+_asm_inthandler21:
+		PUSH	ES
+		PUSH	DS
+		PUSHAD
+		MOV		EAX,ESP
+		PUSH	EAX
+		MOV		AX,SS
+		MOV		DS,AX
+		MOV		ES,AX
+		CALL	_inthandler21
+		POP		EAX
+		POPAD
+		POP		DS
+		POP		ES
+		IRETD
+
+_asm_inthandler27:
+		PUSH	ES
+		PUSH	DS
+		PUSHAD
+		MOV		EAX,ESP
+		PUSH	EAX
+		MOV		AX,SS
+		MOV		DS,AX
+		MOV		ES,AX
+		CALL	_inthandler27
+		POP		EAX
+		POPAD
+		POP		DS
+		POP		ES
+		IRETD
+
+_asm_inthandler2c:
+		PUSH	ES
+		PUSH	DS
+		PUSHAD
+		MOV		EAX,ESP
+		PUSH	EAX
+		MOV		AX,SS
+		MOV		DS,AX
+		MOV		ES,AX
+		CALL	_inthandler2c
+		POP		EAX
+		POPAD
+		POP		DS
+		POP		ES
+		IRETD