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| author | Amaury Pouly <pamaury@rockbox.org> | 2011-11-06 19:44:03 +0000 |
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| committer | Amaury Pouly <pamaury@rockbox.org> | 2011-11-06 19:44:03 +0000 |
| commit | 303c486f4f7d557c35e7b6543fa9827fb94846b9 (patch) | |
| tree | 3c735d8255359f1d3c4525185300035c4f029efc /rbutil/mkimxboot/dualboot/dualboot.S | |
| parent | cd832bd0f5d19b066dc859df9355243de9a95424 (diff) | |
| download | rockbox-303c486f4f7d557c35e7b6543fa9827fb94846b9.tar.gz rockbox-303c486f4f7d557c35e7b6543fa9827fb94846b9.zip | |
Introduce mkimxboot to build bootloader images for the i.MX (only the fuze+ currently). Still not integrated in rbutil
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30920 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'rbutil/mkimxboot/dualboot/dualboot.S')
| -rw-r--r-- | rbutil/mkimxboot/dualboot/dualboot.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/rbutil/mkimxboot/dualboot/dualboot.S b/rbutil/mkimxboot/dualboot/dualboot.S new file mode 100644 index 0000000000..8302829a81 --- /dev/null +++ b/rbutil/mkimxboot/dualboot/dualboot.S @@ -0,0 +1,39 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2011 by Amaury Pouly + * + * 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. + * + ****************************************************************************/ + +.text +.global start +@ int start(uint32_t arg, uint32_t *result_id) +start: +#if defined(SANSA_FUZEPLUS) + /* If volume down key is hold, return so that the OF can boot */ + ldr r2, =0x80018610 @ HW_PINCTRL_DIN1 + ldr r2, [r2] + tst r2, #0x40000000 @ bit 30, active low + moveq r0, #0 @ return 0, continue boot + bxeq lr + /* otherwise jump to section given as argument */ + str r0, [r1] + mov r0, #1 + bx lr +#else +#error No target defined ! +#endif |