arch/x86/include/asm/i8253.h

   1 #ifndef _ASM_X86_I8253_H
   2 #define _ASM_X86_I8253_H
   3
   4 /* i8253A PIT registers */
   5 #define PIT_MODE                0x43
   6 #define PIT_CH0                 0x40
   7 #define PIT_CH2                 0x42
   8
   9 extern spinlock_t i8253_lock;
  10
  11 extern struct clock_event_device *global_clock_event;
  12
  13 extern void setup_pit_timer(void);
  14
  15 #define inb_pit         inb_p
  16 #define outb_pit        outb_p
  17
  18 #endif /* _ASM_X86_I8253_H */