64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/*
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* Copyright (c) 2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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* @brief Full C support initialization
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*
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*
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* Initialization of full C support: zero the .bss, copy the .data if XIP,
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* call _Cstart().
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*
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* Stack is available in this module, but not the global data/bss until their
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* initialization is performed.
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*/
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#include <stdint.h>
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#include <toolchain.h>
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#include <linker-defs.h>
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#include <nano_private.h>
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#include <nano_internal.h>
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/**
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*
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* @brief Prepare to and run C code
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*
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* This routine prepares for the execution of and runs C code.
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*
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* @return N/A
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*/
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void _PrepC(void)
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{
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_bss_zero();
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#ifdef CONFIG_XIP
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_data_copy();
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/* In most XIP scenarios we copy the exception code into RAM, so need
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* to flush instruction cache.
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*/
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_nios2_icache_flush_all();
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#if NIOS2_ICACHE_SIZE > 0
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/* Only need to flush the data cache here if there actually is an
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* instruction cache, so that the cached instruction data written is
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* actually committed.
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*/
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_nios2_dcache_flush_all();
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#endif
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#endif
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_Cstart();
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CODE_UNREACHABLE;
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}
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