From fd86b8a4769860f22fc04ce3b80510d809f68d3c Mon Sep 17 00:00:00 2001
From: Xander <xander@icth.xyz>
Date: Wed, 28 Jun 2023 21:21:02 +0200
Subject: Booting to Long mode

---
 src/arch/x86_64/long_mode_init.asm | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 src/arch/x86_64/long_mode_init.asm

(limited to 'src/arch/x86_64/long_mode_init.asm')

diff --git a/src/arch/x86_64/long_mode_init.asm b/src/arch/x86_64/long_mode_init.asm
new file mode 100644
index 0000000..eab3788
--- /dev/null
+++ b/src/arch/x86_64/long_mode_init.asm
@@ -0,0 +1,17 @@
+global long_mode_start
+
+section .text
+bits 64
+long_mode_start:
+    ; load 0 into all data segment registers
+    mov ax, 0
+    mov ss, ax
+    mov ds, ax
+    mov es, ax
+    mov fs, ax
+    mov gs, ax
+
+    ; print `OKAY` to screen
+    mov rax, 0x2f592f412f4b2f4f
+    mov qword [0xb8000], rax
+    hlt
-- 
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