include/arch/i386/interrupt.h

   1 /* Interrupt numbers and hardware vectors. */
   2
   3 #ifndef _INTERRUPT_H
   4 #define _INTERRUPT_H
   5
   6 #if (CHIP == INTEL)
   7
   8 /* 8259A interrupt controller ports. */
   9 #define INT_CTL         0x20    /* I/O port for interrupt controller */
  10 #define INT_CTLMASK     0x21    /* setting bits in this port disables ints */
  11 #define INT2_CTL        0xA0    /* I/O port for second interrupt controller */
  12 #define INT2_CTLMASK    0xA1    /* setting bits in this port disables ints */
  13
  14 /* Magic numbers for interrupt controller. */
  15 #define END_OF_INT      0x20    /* code used to re-enable after an interrupt */
  16
  17 /* Interrupt vectors defined/reserved by processor. */
  18 #define DIVIDE_VECTOR      0    /* divide error */
  19 #define DEBUG_VECTOR       1    /* single step (trace) */
  20 #define NMI_VECTOR         2    /* non-maskable interrupt */
  21 #define BREAKPOINT_VECTOR  3    /* software breakpoint */
  22 #define OVERFLOW_VECTOR    4    /* from INTO */
  23
  24 /* Fixed system call vector. */
  25 #define KERN_CALL_VECTOR  32    /* system calls are made with int SYSVEC */
  26 #define IPC_VECTOR        33    /* interrupt vector for ipc */
  27
  28 /* Suitable irq bases for hardware interrupts.  Reprogram the 8259(s) from
  29  * the PC BIOS defaults since the BIOS doesn't respect all the processor's
  30  * reserved vectors (0 to 31).
  31  */
  32 #define BIOS_IRQ0_VEC   0x08    /* base of IRQ0-7 vectors used by BIOS */
  33 #define BIOS_IRQ8_VEC   0x70    /* base of IRQ8-15 vectors used by BIOS */
  34 #define IRQ0_VECTOR     0x50    /* nice vectors to relocate IRQ0-7 to */
  35 #define IRQ8_VECTOR     0x70    /* no need to move IRQ8-15 */
  36
  37 /* Hardware interrupt numbers. */
  38 #define NR_IRQ_VECTORS    16
  39 #define CLOCK_IRQ          0
  40 #define KEYBOARD_IRQ       1
  41 #define CASCADE_IRQ        2    /* cascade enable for 2nd AT controller */
  42 #define ETHER_IRQ          3    /* default ethernet interrupt vector */
  43 #define SECONDARY_IRQ      3    /* RS232 interrupt vector for port 2 */
  44 #define RS232_IRQ          4    /* RS232 interrupt vector for port 1 */
  45 #define XT_WINI_IRQ        5    /* xt winchester */
  46 #define FLOPPY_IRQ         6    /* floppy disk */
  47 #define PRINTER_IRQ        7
  48 #define CMOS_CLOCK_IRQ     8
  49 #define KBD_AUX_IRQ       12    /* AUX (PS/2 mouse) port in kbd controller */
  50 #define AT_WINI_0_IRQ     14    /* at winchester controller 0 */
  51 #define AT_WINI_1_IRQ     15    /* at winchester controller 1 */
  52
  53 /* Interrupt number to hardware vector. */
  54 #define BIOS_VECTOR(irq)        \
  55         (((irq) < 8 ? BIOS_IRQ0_VEC : BIOS_IRQ8_VEC) + ((irq) & 0x07))
  56 #define VECTOR(irq)     \
  57         (((irq) < 8 ? IRQ0_VECTOR : IRQ8_VECTOR) + ((irq) & 0x07))
  58
  59 #endif /* (CHIP == INTEL) */
  60
  61 #endif /* _INTERRUPT_H */