1 /* 2 * Copyright (c) 2014 Wind River Systems, Inc. 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 /** 8 * @file 9 * @brief Full C support initialization 10 * 11 * 12 * Initialization of full C support: zero the .bss, copy the .data if XIP, 13 * call z_cstart(). 14 * 15 * Stack is available in this module, but not the global data/bss until their 16 * initialization is performed. 17 */ 18 19 #include <zephyr/types.h> 20 #include <zephyr/toolchain.h> 21 #include <zephyr/linker/linker-defs.h> 22 #include <zephyr/kernel_structs.h> 23 #include <kernel_internal.h> 24 #include <zephyr/platform/hooks.h> 25 #include <zephyr/arch/cache.h> 26 27 /** 28 * @brief Prepare to and run C code 29 * 30 * This routine prepares for the execution of and runs C code. 31 */ 32 z_prep_c(void)33void z_prep_c(void) 34 { 35 #if defined(CONFIG_SOC_PREP_HOOK) 36 soc_prep_hook(); 37 #endif 38 39 z_bss_zero(); 40 z_data_copy(); 41 /* In most XIP scenarios we copy the exception code into RAM, so need 42 * to flush instruction cache. 43 */ 44 #ifdef CONFIG_XIP 45 z_nios2_icache_flush_all(); 46 #if ALT_CPU_ICACHE_SIZE > 0 47 /* Only need to flush the data cache here if there actually is an 48 * instruction cache, so that the cached instruction data written is 49 * actually committed. 50 */ 51 z_nios2_dcache_flush_all(); 52 #endif 53 #endif 54 #if CONFIG_ARCH_CACHE 55 arch_cache_init(); 56 #endif 57 z_cstart(); 58 CODE_UNREACHABLE; 59 } 60
