1 files changed, 52 insertions, 0 deletions
diff --git a/kernel/boot/interrupts/idt.c b/kernel/boot/interrupts/idt.c
new file mode 100644
index 0000000..dadb7c1
--- /dev/null
+++ b/kernel/boot/interrupts/idt.c
@@ -0,0 +1,52 @@
+/*
+ * bubbl
+ * Copyright (C) 2025  Raghuram Subramani <raghus2247@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <boot/interrupts.h>
+#include <common.h>
+#include <kernel/halt.h>
+#include <kernel/io.h>
+#include <libk/stdio.h>
+
+extern void *isr_stub_table[];
+
+static entry_t l_entries[256];
+static descriptor_t descriptor = { sizeof(l_entries) - 1, l_entries };
+static bool l_idt_loaded = false;
+
+bool
+idt_loaded(void)
+{
+  return l_idt_loaded;
+}
+
+void
+idt_load(void)
+{
+  for (uint16_t i = 0; i < 256; i++)
+    l_entries[i] = (entry_t) { 0 };
+
+  /* The first 32 entries are exceptions */
+  for (uint8_t i = 0; i < 32; i++)
+    l_entries[i] = (entry_t) IDT_ENTRY((uint32_t) isr_stub_table[i],
+                                       IDT_PRESENT | IDT_KERNEL_PRIVILEGE_LEVEL
+                                           | IDT_32BIT_INTERRUPT_GATE);
+
+  __asm__ volatile("lidt %0" ::"m"(descriptor));
+
+  l_idt_loaded = true;
+}