54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
/*
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* Copyright (c) 2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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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 <zephyr/types.h>
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#include <toolchain.h>
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#include <linker/linker-defs.h>
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#include <kernel_structs.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 ALT_CPU_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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