80 lines
1.3 KiB
C
80 lines
1.3 KiB
C
#ifndef ARCH_IRQ_H_
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#define ARCH_IRQ_H_
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#include <socks/compiler.h>
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#include <socks/queue.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define NR_IDT_ENTRIES 48
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typedef enum irq_vector {
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IRQ0 = 32,
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IRQ1,
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IRQ2,
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IRQ3,
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IRQ4,
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IRQ5,
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IRQ6,
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IRQ7,
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IRQ8,
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IRQ9,
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IRQ10,
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IRQ11,
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IRQ12,
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IRQ13,
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IRQ14,
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IRQ15,
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} irq_vector_t;
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typedef struct irq_hook {
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queue_entry_t irq_entry;
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int (*irq_callback)(void);
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} irq_hook_t;
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struct cpu_context {
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uint64_t r15, r14, r13, r12, r11, r10, r9, r8;
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uint64_t rdi, rsi, rbp, unused_rsp, rbx, rdx, rcx, rax;
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uint64_t int_no, err_no;
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uint64_t rip, cs, rflags, rsp, ss;
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} __packed;
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struct idt_entry {
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uint16_t base_low;
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uint16_t selector;
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uint8_t always0;
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uint8_t type : 4;
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uint8_t zero : 1;
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uint8_t dpl : 2;
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uint8_t present : 1;
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uint16_t base_middle;
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uint32_t base_high;
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uint32_t reserved;
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} __packed;
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struct idt {
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struct idt_entry i_entries[NR_IDT_ENTRIES];
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};
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struct idt_ptr {
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uint16_t i_limit;
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uintptr_t i_base;
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} __packed;
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typedef void (*int_hook)(struct cpu_context *);
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extern int idt_init(struct idt_ptr *idtp);
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extern int idt_load(struct idt_ptr *idtp);
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extern void hook_irq(irq_vector_t vec, irq_hook_t *hook);
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extern void unhook_irq(irq_vector_t vec, irq_hook_t *hook);
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#ifdef __cplusplus
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}
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#endif
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#endif
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