| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |