include/asm-x86/i8259.h

   1 #ifndef __ASM_I8259_H__
   2 #define __ASM_I8259_H__
   3
   4 extern unsigned int cached_irq_mask;
   5
   6 #define __byte(x,y)             (((unsigned char *) &(y))[x])
   7 #define cached_master_mask      (__byte(0, cached_irq_mask))
   8 #define cached_slave_mask       (__byte(1, cached_irq_mask))
   9
  10 /* i8259A PIC registers */
  11 #define PIC_MASTER_CMD          0x20
  12 #define PIC_MASTER_IMR          0x21
  13 #define PIC_MASTER_ISR          PIC_MASTER_CMD
  14 #define PIC_MASTER_POLL         PIC_MASTER_ISR
  15 #define PIC_MASTER_OCW3         PIC_MASTER_ISR
  16 #define PIC_SLAVE_CMD           0xa0
  17 #define PIC_SLAVE_IMR           0xa1
  18
  19 /* i8259A PIC related value */
  20 #define PIC_CASCADE_IR          2
  21 #define MASTER_ICW4_DEFAULT     0x01
  22 #define SLAVE_ICW4_DEFAULT      0x01
  23 #define PIC_ICW4_AEOI           2
  24
  25 extern spinlock_t i8259A_lock;
  26
  27 extern void init_8259A(int auto_eoi);
  28 extern void enable_8259A_irq(unsigned int irq);
  29 extern void disable_8259A_irq(unsigned int irq);
  30 extern unsigned int startup_8259A_irq(unsigned int irq);
  31
  32 #define inb_pic         inb_p
  33 #define outb_pic        outb_p
  34
  35 #endif  /* __ASM_I8259_H__ */