From 346423c040fe4ac31dae7c1afcb1d853cc80635c Mon Sep 17 00:00:00 2001
From: Cástor Muñoz <cmvidal@gmail.com>
Date: Thu, 4 Feb 2016 23:05:17 +0100
Subject: mks5lboot v1.0 - dualboot installer for s5l8702 targets

A tool to install/uninstall a bootloader into a s5l8702 based device:

- iPod Classic 6G
- iPod Nano 3G (TODO)

See mks5lboot/README for detailed info.

Change-Id: I451d2aaff34509ebd356e4660647e5222c5d3409
---
 rbutil/mks5lboot/dualboot/init.S | 43 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 rbutil/mks5lboot/dualboot/init.S

(limited to 'rbutil/mks5lboot/dualboot/init.S')

diff --git a/rbutil/mks5lboot/dualboot/init.S b/rbutil/mks5lboot/dualboot/init.S
new file mode 100644
index 0000000000..bd049515f4
--- /dev/null
+++ b/rbutil/mks5lboot/dualboot/init.S
@@ -0,0 +1,43 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id:
+ *
+ * Copyright © 2009 Michael Sparmann
+ *
+ * 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 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+    .section .init.text, "ax", %progbits
+    .global _start
+
+_start:
+    mov     r0, #0xD7
+    msr     CPSR_c, r0         @ Abort mode, IRQs/FIQs disabled
+    ldr     sp, =_exception_stack
+
+    mov     r0, #0xDB
+    msr     CPSR_c, r0         @ Undefined Instruction mode, IRQs/FIQs disabled
+    ldr     sp, =_exception_stack
+
+    mov     r0, #0xD3
+    msr     CPSR_c, r0         @ Supervisor mode, IRQs/FIQs disabled
+    ldr     sp, =_supervisor_stack
+
+    MOV R0, #0x00050000
+    ORR R0, #0x00000078
+    MCR p15, 0, R0, c1, c0, 0  @ Get rid of some CPU "features" likely to cause trouble
+
+    bl      main
+    .ltorg
-- 
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