x86_64: add basic interrupt handling

2023-02-08 20:24:40 +00:00
parent 18c5b34923
commit 5e10f566a4
7 changed files with 515 additions and 3 deletions
--- a/arch/x86_64/include/arch/irq.h
+++ b/arch/x86_64/include/arch/irq.h
@@ -0,0 +1,43 @@
+#ifndef ARCH_IRQ_H_
+#define ARCH_IRQ_H_
+
+#include <socks/compiler.h>
+#include <stdint.h>
+
+#define NR_IDT_ENTRIES 48
+
+struct cpu_context {
+    uint64_t r15, r14, r13, r12, r11, r10, r9, r8;
+    uint64_t rdi, rsi, rbp, unused_rsp, rbx, rdx, rcx, rax;
+    uint64_t int_no, err_no;
+    uint64_t rip, cs, rflags, rsp, ss;
+} __packed;
+
+struct idt_entry {
+    uint16_t base_low;
+    uint16_t selector;
+    uint8_t always0;
+    uint8_t type : 4;
+    uint8_t zero : 1;
+    uint8_t dpl : 2;
+    uint8_t present : 1;
+    uint16_t base_middle;
+    uint32_t base_high;
+    uint32_t reserved;
+} __packed;
+
+struct idt {
+    struct idt_entry i_entries[NR_IDT_ENTRIES];
+};
+
+struct idt_ptr {
+    uint16_t i_limit;
+    uintptr_t i_base;
+} __packed;
+
+typedef void (*int_hook)(struct cpu_context *);
+
+extern int idt_init(struct idt_ptr *idtp);
+extern int idt_load(struct idt_ptr *idtp);
+
+#endif