include/asm-mips/i8253.h

   1 /*
   2  *  Machine specific IO port address definition for generic.
   3  *  Written by Osamu Tomita <tomita@cinet.co.jp>
   4  */
   5 #ifndef _MACH_IO_PORTS_H
   6 #define _MACH_IO_PORTS_H
   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
  30 #endif /* !_MACH_IO_PORTS_H */