32 lines
755 B
C
32 lines
755 B
C
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#include <kernel/pic.h>
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#include <kernel/io.h>
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void pic_send_eoi(uint8_t irq) {
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if (irq > 7)
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outb(PIC_2_COMMAND, PIC_EOI);
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else
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outb(PIC_1_COMMAND, PIC_EOI);
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}
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void pic_remap(int pic1_start, int pic2_start) {
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// Mask all IRQ lines
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outb(PIC_1_DATA, 0xff);
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outb(PIC_2_DATA, 0xff);
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// Initialize master PIC
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outb(PIC_1_COMMAND, ICW4_NEEDED | INIT_BIT);
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outb(PIC_1_DATA, pic1_start);
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outb(PIC_1_DATA, PIC_1_ICW3);
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outb(PIC_1_DATA, 0x01);
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// Initialize slave PIC
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outb(PIC_2_COMMAND, ICW4_NEEDED | INIT_BIT);
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outb(PIC_2_DATA, pic2_start);
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outb(PIC_2_DATA, PIC_2_ICW3);
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outb(PIC_2_DATA, 0x01);
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// Unmask
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//outb(PIC_1_DATA, 0b11111101);
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//outb(PIC_2_DATA, 0b11111101);
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}
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