52 lines
825 B
ArmAsm
52 lines
825 B
ArmAsm
#include "drivers/pic/pic.h"
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.code32
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.global init_pic
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init_pic:
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# init command
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mov $0x11, %al
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outb %al, $PIC1_COMMAND
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outb %al, $PIC2_COMMAND
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# vector offsets
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mov $0x20, %al
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outb %al, $PIC1_DATA
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mov $0x28, %al
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outb %al, $PIC2_DATA
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# cascade
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mov $0x04, %al
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outb %al, $PIC1_DATA
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mov $0x02, %al
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outb %al, $PIC2_DATA
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# env
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mov $0x01, %al
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outb %al, $PIC1_DATA
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outb %al, $PIC2_DATA
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# mask all
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mov $0xFC, %al
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outb %al, $PIC1_DATA
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mov $0xFF, %al
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outb %al, $PIC2_DATA
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ret
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.global io_wait
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io_wait:
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ret
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.global send_eoi_master
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send_eoi_master:
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mov $0x20, %al
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outb %al, $PIC1_COMMAND
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ret
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.global send_eoi_slave
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send_eoi_slave:
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mov $0x20, %al
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outb %al, $PIC2_COMMAND
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call send_eoi_master
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ret
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