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#ifndef I386_PIC_H
#define I386_PIC_H
#include <kernel/idt.h>
#include <stdint.h>
#define PIC1 0x20
#define PIC2 0x28
#define PIC1_COMMAND PIC1
#define PIC1_DATA (PIC1+1)
#define PIC2_COMMAND PIC2
#define PIC2_DATA (PIC2+1)
#define ICW1_ICW4 0x01
#define ICW1_SINGLE 0x02
#define ICW1_INTERVAL4 0x04
#define ICW1_LEVEL 0x08
#define ICW1_INIT 0x10
#define ICW4_8086 0x01
#define ICW4_AUTO 0x02
#define ICW4_BUF_SLAVE 0x08
#define ICW4_BUF_MASTER 0x0C
#define ICW4_SFNM 0x10
#define PIC_READ_IRR 0x0A
#define PIC_READ_ISR 0x0B
static inline void outb(uint16_t port, uint8_t value) {
__asm__ volatile("outb %0, %1" : : "a"(value), "Nd"(port));
}
static inline uint8_t inb(uint16_t port) {
uint8_t ret;
__asm__ volatile("inb %1, %0" : "=a"(ret) : "Nd"(port));
return ret;
}
static inline void io_wait(void) {
outb(0x80, 0);
}
void pic_eoi(uint8_t irq);
void pic_remap(void);
uint16_t pic_get_irr(void);
uint16_t pic_get_isr(void);
void register_irq_handler(uint8_t irq, void (*handler)(struct isr_frame *frame));
void irq_set_mask(uint8_t irq);
void irq_clear_mask(uint8_t irq);
#endif
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