| Ralf Baechle | d865bea | 2007-10-11 23:46:10 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Machine specific IO port address definition for generic. |
| 3 | * Written by Osamu Tomita <tomita@cinet.co.jp> |
| 4 | */ |
| Ralf Baechle | 9490094 | 2007-10-22 15:17:39 +0100 | [diff] [blame^] | 5 | #ifndef __ASM_I8253_H |
| 6 | #define __ASM_I8253_H |
| Ralf Baechle | d865bea | 2007-10-11 23:46:10 +0100 | [diff] [blame] | 7 | |
| 8 | /* i8253A PIT registers */ |
| 9 | #define PIT_MODE 0x43 |
| 10 | #define PIT_CH0 0x40 |
| 11 | #define PIT_CH2 0x42 |
| 12 | |
| 13 | /* i8259A PIC registers */ |
| 14 | #define PIC_MASTER_CMD 0x20 |
| 15 | #define PIC_MASTER_IMR 0x21 |
| 16 | #define PIC_MASTER_ISR PIC_MASTER_CMD |
| 17 | #define PIC_MASTER_POLL PIC_MASTER_ISR |
| 18 | #define PIC_MASTER_OCW3 PIC_MASTER_ISR |
| 19 | #define PIC_SLAVE_CMD 0xa0 |
| 20 | #define PIC_SLAVE_IMR 0xa1 |
| 21 | |
| 22 | /* i8259A PIC related value */ |
| 23 | #define PIC_CASCADE_IR 2 |
| 24 | #define MASTER_ICW4_DEFAULT 0x01 |
| 25 | #define SLAVE_ICW4_DEFAULT 0x01 |
| 26 | #define PIC_ICW4_AEOI 2 |
| 27 | |
| 28 | extern void setup_pit_timer(void); |
| 29 | |
| Ralf Baechle | 9490094 | 2007-10-22 15:17:39 +0100 | [diff] [blame^] | 30 | #endif /* __ASM_I8253_H */ |