io_ports.h

来自「linux 内核源代码」· C头文件 代码 · 共 26 行

/*
 *  arch/i386/mach-generic/io_ports.h
 *
 *  Machine specific IO port address definition for generic.
 *  Written by Osamu Tomita <[e-mail]>
 */
#ifndef _MACH_IO_PORTS_H
#define _MACH_IO_PORTS_H

/* i8259A PIC registers */
#define PIC_MASTER_CMD		0x20
#define PIC_MASTER_IMR		0x21
#define PIC_MASTER_ISR		PIC_MASTER_CMD
#define PIC_MASTER_POLL		PIC_MASTER_ISR
#define PIC_MASTER_OCW3		PIC_MASTER_ISR
#define PIC_SLAVE_CMD		0xa0
#define PIC_SLAVE_IMR		0xa1

/* i8259A PIC related value */
#define PIC_CASCADE_IR		2
#define MASTER_ICW4_DEFAULT	0x01
#define SLAVE_ICW4_DEFAULT	0x01
#define PIC_ICW4_AEOI		2

#endif /* !_MACH_IO_PORTS_H */