| 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 SYS_VECTOR 32 /* system calls are made with int SYSVEC */
|
|---|
| 26 | #define SYS386_VECTOR 33 /* except 386 system calls use this */
|
|---|
| 27 | #define LEVEL0_VECTOR 34 /* for execution of a function at level 0 */
|
|---|
| 28 |
|
|---|
| 29 | /* Suitable irq bases for hardware interrupts. Reprogram the 8259(s) from
|
|---|
| 30 | * the PC BIOS defaults since the BIOS doesn't respect all the processor's
|
|---|
| 31 | * reserved vectors (0 to 31).
|
|---|
| 32 | */
|
|---|
| 33 | #define BIOS_IRQ0_VEC 0x08 /* base of IRQ0-7 vectors used by BIOS */
|
|---|
| 34 | #define BIOS_IRQ8_VEC 0x70 /* base of IRQ8-15 vectors used by BIOS */
|
|---|
| 35 | #define IRQ0_VECTOR 0x50 /* nice vectors to relocate IRQ0-7 to */
|
|---|
| 36 | #define IRQ8_VECTOR 0x70 /* no need to move IRQ8-15 */
|
|---|
| 37 |
|
|---|
| 38 | /* Hardware interrupt numbers. */
|
|---|
| 39 | #define NR_IRQ_VECTORS 16
|
|---|
| 40 | #define CLOCK_IRQ 0
|
|---|
| 41 | #define KEYBOARD_IRQ 1
|
|---|
| 42 | #define CASCADE_IRQ 2 /* cascade enable for 2nd AT controller */
|
|---|
| 43 | #define ETHER_IRQ 3 /* default ethernet interrupt vector */
|
|---|
| 44 | #define SECONDARY_IRQ 3 /* RS232 interrupt vector for port 2 */
|
|---|
| 45 | #define RS232_IRQ 4 /* RS232 interrupt vector for port 1 */
|
|---|
| 46 | #define XT_WINI_IRQ 5 /* xt winchester */
|
|---|
| 47 | #define FLOPPY_IRQ 6 /* floppy disk */
|
|---|
| 48 | #define PRINTER_IRQ 7
|
|---|
| 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 */
|
|---|
