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100 lines
4.5 KiB
C
100 lines
4.5 KiB
C
/******************************************************************************
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* *
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* License Agreement *
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* *
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* Copyright (c) 2004-2005 Altera Corporation, San Jose, California, USA. *
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* All rights reserved. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the "Software"), *
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* to deal in the Software without restriction, including without limitation *
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
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* and/or sell copies of the Software, and to permit persons to whom the *
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* Software is furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in *
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* all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
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* DEALINGS IN THE SOFTWARE. *
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* *
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* This agreement shall be governed in all respects by the laws of the State *
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* of California and by the laws of the United States of America. *
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* *
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* Altera does not recommend, suggest or require that this reference design *
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* file be used in conjunction or combination with any other product. *
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******************************************************************************/
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#include "sys/alt_load.h"
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#include "sys/alt_cache.h"
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/*
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* Linker defined symbols.
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These used to be
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* extern alt_u32 __flash_rwdata_start;
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* extern alt_u32 __ram_rwdata_start;
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* extern alt_u32 __ram_rwdata_end;
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* but that results in a fatal error when compiling -mgpopt=global
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* because gcc assumes they are normal C variables in .sdata
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* and therefore addressable from gp using a 16-bit offset,
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* when in fact they are special values defined by linker.x
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* and located nowhere near .sdata.
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* Specifying __attribute__((section(".data"))) will force these
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* in .data. (CASE:258384.)
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*/
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extern alt_u32 __flash_rwdata_start __attribute__((section(".data")));
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extern alt_u32 __ram_rwdata_start __attribute__((section(".data")));
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extern alt_u32 __ram_rwdata_end __attribute__((section(".data")));
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extern alt_u32 __flash_rodata_start __attribute__((section(".data")));
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extern alt_u32 __ram_rodata_start __attribute__((section(".data")));
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extern alt_u32 __ram_rodata_end __attribute__((section(".data")));
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extern alt_u32 __flash_exceptions_start __attribute__((section(".data")));
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extern alt_u32 __ram_exceptions_start __attribute__((section(".data")));
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extern alt_u32 __ram_exceptions_end __attribute__((section(".data")));
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/*
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* alt_load() is called when the code is executing from flash. In this case
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* there is no bootloader, so this application is responsible for loading to
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* RAM any sections that are required.
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*/
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void alt_load (void)
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{
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/*
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* Copy the .rwdata section.
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*/
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alt_load_section (&__flash_rwdata_start,
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&__ram_rwdata_start,
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&__ram_rwdata_end);
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/*
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* Copy the exception handler.
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*/
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alt_load_section (&__flash_exceptions_start,
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&__ram_exceptions_start,
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&__ram_exceptions_end);
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/*
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* Copy the .rodata section.
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*/
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alt_load_section (&__flash_rodata_start,
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&__ram_rodata_start,
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&__ram_rodata_end);
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/*
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* Now ensure that the caches are in synch.
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*/
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alt_dcache_flush_all();
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alt_icache_flush_all();
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}
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