a69d83d312
the cortex generic interrupts get moved to lib/cm3/vector.c, the platorms' individual irq names, initialization and handler prototypes go to platoform specific irq.h files. as the vector.c file heavily depends on platoform specific headers, it can't be built once-and-for-all in lib/cm3/, so there are inclusion stubs in the various architecture dirs; this might be better solved with Makefile / include path handling. one particular file is lib/lpc43xx/vector.c; that platform's initialization code contains an additional section to copy everything from flash to ram (which probably performs better there). that code still resides in the inclusion stub, and gets mashed in using defines. would need a cleaner implementation together with the Makefile solution. this commit contains some files of the upcoming efm32 branch, from which it was cherry-picked. the .bin files produced from before and after this commit only differ in lpc43xx, where the startup sequence was subtly modified.
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
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* Copyright (C) 2012 Michael Ossmann <mike@ossmann.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/lpc43xx/irq.h>
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#define reset_handler original_reset_handler
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#include "../cm3/vector.c"
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#undef reset_handler
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#include <libopencm3/cm3/common.h>
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extern unsigned _etext_ram, _text_ram, _etext_rom;
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#define CREG_M4MEMMAP MMIO32( (0x40043000 + 0x100) )
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void WEAK reset_handler(void)
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{
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volatile unsigned *src, *dest;
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/* Copy the code from ROM to Real RAM (if enabled) */
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if( (&_etext_ram-&_text_ram) > 0 )
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{
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src = &_etext_rom-(&_etext_ram-&_text_ram);
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/* Change Shadow memory to ROM (for Debug Purpose in case Boot has not set correctly the M4MEMMAP because of debug) */
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CREG_M4MEMMAP = (unsigned long)src;
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for(dest = &_text_ram; dest < &_etext_ram; )
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{
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*dest++ = *src++;
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}
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/* Change Shadow memory to Real RAM */
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CREG_M4MEMMAP = (unsigned long)&_text_ram;
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/* Continue Execution in RAM */
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}
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original_reset_handler();
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}
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