1 files changed, 46 insertions, 0 deletions
diff --git a/kernel/boot/idt/idt.cc b/kernel/boot/idt/idt.cc
new file mode 100644
index 0000000..e640fd5
--- /dev/null
+++ b/kernel/boot/idt/idt.cc
@@ -0,0 +1,46 @@
+/*
+ * 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/idt.h>
+#include <kernel/io.h>
+
+namespace IDT
+{
+
+extern "C" void *isr_stub_table[];
+
+entry_t l_entries[256];
+descriptor_t descriptor = { sizeof(l_entries) - 1, l_entries };
+
+void
+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++) {
+    entry_t idt_entry = IDT_ENTRY((uint32_t) isr_stub_table[i], 0x8E);
+    l_entries[i] = idt_entry;
+  }
+
+  __asm__ volatile("lidt %0" ::"m"(descriptor));
+  __asm__ volatile("sti");
+}
+
+}