65 lines
1.6 KiB
ArmAsm
65 lines
1.6 KiB
ArmAsm
/*
|
|
* 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
|