a sensible source structure

The idea is that src/kernel/ is only allowed to interface with the
hardware using whatever's defined in src/arch/generic.h. I'll probably
write a small script for checking this later on.

This is a giant commit so I've probably fucked something up. It boots
fine on Bochs and QEMU, so at least there's that.

1 files changed, 0 insertions, 75 deletions

diff --git a/src/kernel/idt.c b/src/kernel/idt.c
deleted file mode 100644
index 65f511f..0000000
--- a/src/kernel/idt.c
+++ /dev/null
@@ -1,75 +0,0 @@
-#include <kernel/gdt.h>
-#include <kernel/idt.h>
-#include <kernel/isr.h>
-#include <kernel/panic.h>
-#include <stdbool.h>
-#include <stdint.h>
-
-struct idt_entry {
-	uint16_t offset_low   ;
-	uint16_t code_seg     ;
-	uint8_t  zero         ; // unused, has to be 0
-	uint8_t  type      : 4; // 16/32 bit, task/interrupt/task gate
-	uint8_t  storage   : 1; // 0 for interrupt/trap gates
-	uint8_t  ring      : 2;
-	uint8_t  present   : 1;
-	uint16_t offset_high  ;
-} __attribute__((packed));
-
-// is exactly the same as lgdt_arg, i should combine them into a single struct
-// later
-struct lidt_arg {
-	uint16_t limit;
-	uint32_t base;
-} __attribute__((packed));
-
-
-static struct idt_entry IDT[256];
-static struct lidt_arg lidt_arg;
-
-static inline void idt_add(uint8_t num, bool user, void (*isr));
-static void idt_prepare();
-static void idt_load();
-static void idt_test();
-
-
-static inline void idt_add(uint8_t num, bool user, void (*isr)) {
-	uintptr_t offset = (uintptr_t) isr;
-
-	IDT[num] = (struct idt_entry) {
-		.offset_low  = offset,
-		.offset_high = offset >> 16,
-		.code_seg    = SEG_r0code << 3,
-		.zero        = 0,
-		.present     = 1,
-		.ring        = user ? 3 : 0,
-		.storage     = 0,
-		.type        = 0xE, // 32-bit interrupt gate
-	};
-}
-
-static void idt_prepare() {
-	for (int i = 0; i < 256; i++)
-		IDT[i].present = 0;
-
-	idt_add(0x08, false, isr_double_fault);
-	idt_add(0x0d, false, isr_general_protection_fault);
-	idt_add(0x34, false, isr_test_interrupt);
-}
-
-static void idt_load() {
-	lidt_arg.limit = sizeof(IDT) - 1;
-	lidt_arg.base = (uintptr_t) &IDT;
-	asm("lidt (%0)" : : "r" (&lidt_arg) : "memory");
-}
-
-static void idt_test() {
-	asm("int $0x34" : : : "memory");
-	if (!isr_test_interrupt_called) panic();
-}
-
-void idt_init() {
-	idt_prepare();
-	idt_load();
-	idt_test();
-}