From 9169796632fcdeb5e8e74ed60c6cbe31081e51f2 Mon Sep 17 00:00:00 2001
From: Christian Cunningham <cc@localhost>
Date: Thu, 24 Feb 2022 23:38:38 -0700
Subject: MMU and working on hardware

---
 src/sys/kernel.S | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

(limited to 'src/sys/kernel.S')

diff --git a/src/sys/kernel.S b/src/sys/kernel.S
index 654a9a7..23bf6a7 100644
--- a/src/sys/kernel.S
+++ b/src/sys/kernel.S
@@ -6,13 +6,23 @@
 kernel_main:
 	///https://wiki.osdev.org/ARM_Paging
 	// Query the ID_MMFR0 register
-	mrc p15, 0, r0, c0, c1, 4
+	//mrc p15, 0, r0, c0, c1, 4
 	bl sysinit
+	bl status
+	ldr r2, =ttbr_msg
+	mov r0, #0
+	mov r1, #0
+	mov r3, #0xFF00
+	bl draw_cstring
 
 	// Intentional undefined instruction
 	// .word 0xf7f0a000
 	cpsie aif, #0x10
 	svc #2 // Start scheduling!
-1:
+2:
 	wfe
-	b 1b
+	b 2b
+
+.section .data
+ttbr_msg:
+	.asciz "MMU Initialized!"
-- 
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