31 lines
741 B
C
31 lines
741 B
C
|
/*
|
||
|
|
* 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 */
|