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