| /* |
| * 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 Reset handler |
| * |
| * Reset handler that prepares the system for running C code. |
| */ |
| |
| #define _ASMLANGUAGE |
| |
| // #include <board.h> |
| #include <toolchain.h> |
| #include <sections.h> |
| #include <arch/cpu.h> |
| |
| #ifdef CONFIG_HARVARD |
| #define _TOP_OF_MEMORY (CONFIG_DCCM_BASE_ADDRESS + CONFIG_DCCM_SIZE * 1024) |
| /* harvard places the initial stack in the dccm memory */ |
| #else |
| #define _TOP_OF_MEMORY (CONFIG_SRAM_BASE_ADDRESS + CONFIG_SRAM_SIZE * 1024) |
| #endif |
| |
| GTEXT(__reset) |
| GTEXT(__start) |
| |
| /** |
| * |
| * @brief Reset vector |
| * |
| * Ran when the system comes out of reset. The processor is at supervisor level. |
| * |
| * Locking interrupts prevents anything from interrupting the CPU. |
| * |
| * When these steps are completed, jump to _PrepC(), which will finish setting |
| * up the system for running C code. |
| * |
| * @return N/A |
| */ |
| |
| SECTION_FUNC(TEXT,__reset) |
| SECTION_FUNC(TEXT,__start) |
| |
| /* lock interrupts: will get unlocked when switch to main task */ |
| clri |
| |
| /* setup a stack at the end of MEMORY */ |
| mov sp, _TOP_OF_MEMORY |
| |
| j @_PrepC |