1 /* 2 * arch/i386/mach-generic/io_ports.h 3 * 4 * Machine specific IO port address definition for generic. 5 * Written by Osamu Tomita <tomita@cinet.co.jp> 6 */ 7 #ifndef _MACH_IO_PORTS_H 8 #define _MACH_IO_PORTS_H 9 10 /* i8253A PIT registers */ 11 #define PIT_MODE 0x43 12 #define PIT_CH0 0x40 13 #define PIT_CH2 0x42 14 15 /* i8259A PIC registers */ 16 #define PIC_MASTER_CMD 0x20 17 #define PIC_MASTER_IMR 0x21 18 #define PIC_MASTER_ISR PIC_MASTER_CMD 19 #define PIC_MASTER_POLL PIC_MASTER_ISR 20 #define PIC_MASTER_OCW3 PIC_MASTER_ISR 21 #define PIC_SLAVE_CMD 0xa0 22 #define PIC_SLAVE_IMR 0xa1 23 24 /* i8259A PIC related value */ 25 #define PIC_CASCADE_IR 2 26 #define MASTER_ICW4_DEFAULT 0x01 27 #define SLAVE_ICW4_DEFAULT 0x01 28 #define PIC_ICW4_AEOI 2 29 30 #endif /* !_MACH_IO_PORTS_H */ 31