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Luke Street
51 lines
1.9 KiB
C
51 lines
1.9 KiB
C
#pragma once
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#include <common.h>
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#define IRQ0 32 // Timer
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#define IRQ1 33 // Keyboard
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#define IRQ2 34 // Cascade for 8259A Slave controller
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#define IRQ3 35 // Serial port 2
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#define IRQ4 36 // Serial port 1
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#define IRQ5 37 // AT systems: Parallel Port 2. PS/2 systems: reserved
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#define IRQ6 38 // Diskette drive
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#define IRQ7 39 // Parallel Port 1
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#define IRQ8 40 // CMOS Real time clock
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#define IRQ9 41 // CGA vertical retrace
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#define IRQ10 42 // Reserved
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#define IRQ11 43 // Reserved
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#define IRQ12 44 // AT systems: reserved. PS/2: auxiliary device
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#define IRQ13 45 // FPU
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#define IRQ14 46 // Hard disk controller
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#define IRQ15 47 // Reserved
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#define I86_PIC1_REG_COMMAND 0x20 // command register
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#define I86_PIC1_REG_STATUS 0x20 // status register
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#define I86_PIC1_REG_DATA 0x21 // data register
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#define I86_PIC1_REG_IMR 0x21 // interrupt mask register (imr)
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#define I86_PIC2_REG_COMMAND 0xA0
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#define I86_PIC2_REG_STATUS 0xA0
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#define I86_PIC2_REG_DATA 0xA1
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#define I86_PIC2_REG_IMR 0xA1
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#define I86_PIC_OCW2_MASK_L1 1 //00000001 //Level 1 interrupt level
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#define I86_PIC_OCW2_MASK_L2 2 //00000010 //Level 2 interrupt level
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#define I86_PIC_OCW2_MASK_L3 4 //00000100 //Level 3 interrupt level
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#define I86_PIC_OCW2_MASK_EOI 0x20 //00100000 //End of Interrupt command
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#define I86_PIC_OCW2_MASK_SL 0x40 //01000000 //Select command
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#define I86_PIC_OCW2_MASK_ROTATE 0x80 //10000000 //Rotation command
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typedef struct registers {
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uint32_t cr2, mxcsr;
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uint32_t edi, esi, ebp, esp, ebx, edx, ecx, eax; // Pushed by pusha.
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uint32_t int_no, err_code; // Interrupt number and error code (if applicable)
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uint32_t eip, cs, eflags, useresp, ss; // Pushed by the processor automatically.
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} registers_t;
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// Enables registration of callbacks for interrupts or IRQs.
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// For IRQs, to ease confusion, use the #defines above as the
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// first parameter.
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typedef void (*isr_t)(registers_t);
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void register_interrupt_handler(uint8_t n, isr_t handler); |