74 lines
2.1 KiB
ArmAsm
74 lines
2.1 KiB
ArmAsm
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2008 by Michael Sevakis
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* Copyright (C) 2012 by Marcin Bukat
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*
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* RoLo firmware restart code for rk27xx
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "cpu.h"
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/****************************************************************************
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* void rolo_restart(const unsigned char* source, unsigned char* dest,
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* int length);
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*/
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.section .text, "ax", %progbits
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.align 2
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.global rolo_restart
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rolo_restart:
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/* Disable cache */
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ldr r4, =0xefff0000
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ldrh r5, [r4]
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strh r5, [r4]
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/* Ungate all clocks */
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ldr r4, =0x1801c018
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eor r5, r5
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str r5, [r4]
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adr r4, restart_copy_start
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adr r5, restart_copy_end
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ldr r6, =0x18200000
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mov r7, r6
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/* Copy stub to IRAM */
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1:
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ldr r8, [r4], #4
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str r8, [r7], #4
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cmp r5, r4
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bhi 1b
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/* Branch to stub */
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bx r6
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restart_copy_start:
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/* Trivial copy of firmware to final location
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* this version assumes that src and dst are
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* word aligned
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*/
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mov r4, r1
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1:
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subs r2, r2, #4
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ldr r7, [r0], #4
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str r7, [r4], #4
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bge 1b
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/* Branch to destination */
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bx r1
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restart_copy_end:
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.size rolo_restart,.-rolo_restart
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