From 138424b31d9c2af158e8ae619248b035b5a280d9 Mon Sep 17 00:00:00 2001 From: Nic Gaffney Date: Thu, 21 Dec 2023 03:32:06 -0600 Subject: set up bochs for debugging and started working on interrupts. --- src/kernel/idt.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 src/kernel/idt.c (limited to 'src/kernel/idt.c') diff --git a/src/kernel/idt.c b/src/kernel/idt.c new file mode 100644 index 0000000..f3fea4f --- /dev/null +++ b/src/kernel/idt.c @@ -0,0 +1,28 @@ +#include "idt.h" +#include "gdt.h" +#include + +IDT_t idt = (IDT_t)0x7fffe; +extern GDTR_t idtr; + +void get_idtr() { + int base = 0x7fffe; + uint8_t code_seg = (0b1000 << 3) | 0b000; + + // idtr.size = sizeof(Gate_Descriptor_t) * n - 1; + idtr.size = 0; + idtr.offset = base; +} + +Gate_Descriptor_t make_gate(uint32_t offset, uint8_t segment_selector, + uint8_t type) { + Gate_Descriptor_t ret = (Gate_Descriptor_t){ + .offset_low = offset, + .reserved = 0, + .attrs = (0b1000 << 4) | type, + .offset_high = offset >> 16, + .segment_selector = segment_selector, + }; + + return ret; +} -- cgit v1.2.3