diff options
Diffstat (limited to 'kernel/hal/interrupts.h')
| -rw-r--r-- | kernel/hal/interrupts.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/kernel/hal/interrupts.h b/kernel/hal/interrupts.h new file mode 100644 index 0000000..673b13b --- /dev/null +++ b/kernel/hal/interrupts.h @@ -0,0 +1,92 @@ +//+---------------------------------------------------------------------------- +// +// File: interrupts.h +// +// Module: +// +// Synopsis: +// +// Created: sgasch 6 Jul 2003 +// +//+---------------------------------------------------------------------------- + +#ifndef _INTERRUPTS_H_ +#define _INTERRUPTS_H_ + +#define NUM_IDT_ENTRIES (256) + +// Exceptions range from 0x00..0x11 +#define FIRST_EXCEPTION 0x00 +#define LAST_EXCEPTION 0x11 +#define NUM_EXCEPTIONS 18 + +// External IRQs range from 0x30..0x3F +#define FIRST_EXTERNAL_INT 0x30 +#define LAST_EXTERNAL_INT 0x3F +#define IRQ0 0x30 +#define IRQ1 0x31 +#define IRQ2 0x39 +#define IRQ3 0x33 +#define IRQ4 0x34 +#define IRQ5 0x35 +#define IRQ6 0x36 +#define IRQ7 0x37 +#define IRQ8 0x38 +#define IRQ9 0x39 +#define IRQ10 0x3A +#define IRQ11 0x3B +#define IRQ12 0x3C +#define IRQ13 0x3D +#define IRQ14 0x3E +#define IRQ15 0x3F +#define NUM_EXTERNAL_INTS 16 + +typedef struct _INTERRUPT_GATE +{ + USHORT offsetLow; + USHORT segmentSelector; + USHORT reserved : 5; + USHORT signature : 8; + USHORT dpl : 2; + USHORT present : 1; + USHORT offsetHigh; +} +INTERRUPT_GATE; + +typedef union _IDT_ENTRY +{ + INTERRUPT_GATE i; + // In theory we could have members for trap gates + // and task gates if we wanted. +} +IDT_ENTRY; + +// +// Defined in intsupport.asm +// +extern void HalInterruptInitializePICs(void); +extern void HalInterruptLoadIDTR(void *uLimitAndBase); +extern void HalIoDelay(void); +extern BYTE HalInterruptHandlerPreamble; +extern BYTE HalInterruptHandlerPreambleBefore; +extern BYTE HalInterruptHandlerPreambleAfter; + +// +// Defined in interrupts.c +// +extern void HalDisableInterrupts(void); +extern void HalEnableInterrupts(void); + + +// +// Defined in keyboard.c +// +extern void HalKeyboardInt(INTERRUPT_STATE *is); + +// +// Defined in timer.c +// +extern void HalTimerInt(INTERRUPT_STATE *is); + +#endif + |