summaryrefslogtreecommitdiffstats
path: root/rbutil/mks5lboot/dualboot/init.S
diff options
context:
space:
mode:
Diffstat (limited to 'rbutil/mks5lboot/dualboot/init.S')
-rw-r--r--rbutil/mks5lboot/dualboot/init.S43
1 files changed, 43 insertions, 0 deletions
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