自己动手写操作系统的光盘资料,是学习操作系统的很好资料
源代码在线查看： const.h
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
const.h
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Forrest Yu, 2005
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
#ifndef _TINIX_CONST_H_
#define _TINIX_CONST_H_
/* EXTERN */
#define EXTERN extern /* EXTERN is defined as extern except in global.c */
/* 函数类型 */
#define PUBLIC /* PUBLIC is the opposite of PRIVATE */
#define PRIVATE static /* PRIVATE x limits the scope of x */
/* Boolean */
#define TRUE 1
#define FALSE 0
/* Color */
/*
* e.g. MAKE_COLOR(BLUE, RED)
* MAKE_COLOR(BLACK, RED) | BRIGHT
* MAKE_COLOR(BLACK, RED) | BRIGHT | FLASH
*/
#define BLACK 0x0 /* 0000 */
#define WHITE 0x7 /* 0111 */
#define RED 0x4 /* 0100 */
#define GREEN 0x2 /* 0010 */
#define BLUE 0x1 /* 0001 */
#define FLASH 0x80 /* 1000 0000 */
#define BRIGHT 0x08 /* 0000 1000 */
#define MAKE_COLOR(x,y) (x | y) /* MAKE_COLOR(Background,Foreground) */
/* GDT 和 IDT 中描述符的个数 */
#define GDT_SIZE 128
#define IDT_SIZE 256
/* 权限 */
#define PRIVILEGE_KRNL 0
#define PRIVILEGE_TASK 1
#define PRIVILEGE_USER 3
/* RPL */
#define RPL_KRNL SA_RPL0
#define RPL_TASK SA_RPL1
#define RPL_USER SA_RPL3
/* 8259A interrupt controller ports. */
#define INT_M_CTL 0x20 /* I/O port for interrupt controller */
#define INT_M_CTLMASK 0x21 /* setting bits in this port disables ints */
#define INT_S_CTL 0xA0 /* I/O port for second interrupt controller */
#define INT_S_CTLMASK 0xA1 /* setting bits in this port disables ints */
/* 8253/8254 PIT (Programmable Interval Timer) */
#define TIMER0 0x40 /* I/O port for timer channel 0 */
#define TIMER_MODE 0x43 /* I/O port for timer mode control */
#define RATE_GENERATOR 0x34 /* 00-11-010-0 : Counter0 - LSB then MSB - rate generator - binary */
#define TIMER_FREQ 1193182L/* clock frequency for timer in PC and AT */
#define HZ 100 /* clock freq (software settable on IBM-PC) */
/* AT keyboard */
/* 8042 ports */
#define KB_DATA 0x60 /* I/O port for keyboard data
Read : Read Output Buffer
Write: Write Input Buffer(8042 Data&8048 Command) */
#define KB_CMD 0x64 /* I/O port for keyboard command
Read : Read Status Register
Write: Write Input Buffer(8042 Command) */
/* Hardware interrupts */
#define NR_IRQ 16 /* Number of IRQs */
#define CLOCK_IRQ 0
#define KEYBOARD_IRQ 1
#define CASCADE_IRQ 2 /* cascade enable for 2nd AT controller */
#define ETHER_IRQ 3 /* default ethernet interrupt vector */
#define SECONDARY_IRQ 3 /* RS232 interrupt vector for port 2 */
#define RS232_IRQ 4 /* RS232 interrupt vector for port 1 */
#define XT_WINI_IRQ 5 /* xt winchester */
#define FLOPPY_IRQ 6 /* floppy disk */
#define PRINTER_IRQ 7
#define AT_WINI_IRQ 14 /* at winchester */
/* system call */
#define NR_SYS_CALL 1
#endif /* _TINIX_CONST_H_ */
