diff options
Diffstat (limited to 'include/asm-mips')
| -rw-r--r-- | include/asm-mips/i8253.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/asm-mips/i8253.h b/include/asm-mips/i8253.h new file mode 100644 index 0000000..8f689d7 --- /dev/null +++ b/include/asm-mips/i8253.h @@ -0,0 +1,30 @@ +/* + * Machine specific IO port address definition for generic. + * Written by Osamu Tomita <tomita@cinet.co.jp> + */ +#ifndef _MACH_IO_PORTS_H +#define _MACH_IO_PORTS_H + +/* i8253A PIT registers */ +#define PIT_MODE 0x43 +#define PIT_CH0 0x40 +#define PIT_CH2 0x42 + +/* 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 + +extern void setup_pit_timer(void); + +#endif /* !_MACH_IO_PORTS_H */ |