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, 16 insertions, 0 deletions

diff --git a/src/arch/i386/gdt.h b/src/arch/i386/gdt.h
new file mode 100644
index 0000000..bcb9870
--- /dev/null
+++ b/src/arch/i386/gdt.h
@@ -0,0 +1,16 @@
+#pragma once
+
+enum {
+	SEG_null,
+	// order dictated by SYSENTER
+	SEG_r0code,
+	SEG_r0data,
+	SEG_r3code,
+	SEG_r3data,
+	SEG_TSS,
+
+	SEG_end
+};
+
+void gdt_init();
+void gdt_farjump(int segment);