mirror of https://github.com/rusefi/openblt.git
105 lines
4.0 KiB
ArmAsm
105 lines
4.0 KiB
ArmAsm
/****************************************************************************************
|
|
| Description: bootloader C startup source file
|
|
| File Name: cstart.s
|
|
|
|
|
|----------------------------------------------------------------------------------------
|
|
| C O P Y R I G H T
|
|
|----------------------------------------------------------------------------------------
|
|
| Copyright (c) 2011 by Feaser http://www.feaser.com All rights reserved
|
|
|
|
|
|----------------------------------------------------------------------------------------
|
|
| L I C E N S E
|
|
|----------------------------------------------------------------------------------------
|
|
| This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
|
|
| modify it under the terms of the GNU General Public License as published by the Free
|
|
| Software Foundation, either version 3 of the License, or (at your option) any later
|
|
| version.
|
|
|
|
|
| OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
|
|
| without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
| PURPOSE. See the GNU General Public License for more details.
|
|
|
|
|
| You should have received a copy of the GNU General Public License along with OpenBLT.
|
|
| If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
| A special exception to the GPL is included to allow you to distribute a combined work
|
|
| that includes OpenBLT without being obliged to provide the source code for any
|
|
| proprietary components. The exception text is included at the bottom of the license
|
|
| file <license.html>.
|
|
|
|
|
****************************************************************************************/
|
|
|
|
MODULE ?cstartup
|
|
|
|
; Forward declaration of section.
|
|
SECTION CSTACK:DATA:NOROOT(3)
|
|
|
|
PUBLIC EntryFromProg
|
|
PUBLIC reset_handler
|
|
EXTERN __cmain
|
|
EXTERN __vector_table
|
|
EXTERN ComSetConnectEntryState
|
|
EXTERN ComSetDisconnectEntryState
|
|
EXTWEAK __iar_init_core
|
|
EXTWEAK __iar_init_vfp
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: EntryFromProg
|
|
** PARAMETER: none
|
|
** RETURN VALUE: none
|
|
** DESCRIPTION: Called by the user program to activate the bootloader. The user
|
|
** program can call this function from C in the following way:
|
|
** void ActivateBootloader(void)
|
|
** {
|
|
** void (*pEntryFromProgFnc)(void);
|
|
**
|
|
** pEntryFromProgFnc = (void*)0x08000150 + 1;
|
|
** pEntryFromProgFnc();
|
|
** }
|
|
** Note that the + 1 added to the function address is neccassary to
|
|
** enable a switch from Thumb2 to Thumb mode.
|
|
**
|
|
****************************************************************************************/
|
|
SECTION .entry:CODE:REORDER(2)
|
|
THUMB
|
|
EntryFromProg:
|
|
; Initialize the stack pointer
|
|
LDR R3, =sfe(CSTACK)
|
|
MOV SP, R3
|
|
|
|
BL __iar_init_core
|
|
BL __iar_init_vfp
|
|
/* this part makes the difference with the normal reset_handler */
|
|
BL ComSetConnectEntryState
|
|
BL __cmain
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: reset_handler
|
|
** PARAMETER: none
|
|
** RETURN VALUE: none
|
|
** DESCRIPTION: Reset interrupt service routine. Configures the stack, initializes RAM
|
|
** and jumps to function main.
|
|
**
|
|
****************************************************************************************/
|
|
SECTION .text:CODE:REORDER(2)
|
|
THUMB
|
|
reset_handler:
|
|
; Initialize the stack pointer
|
|
LDR R3, =sfe(CSTACK)
|
|
MOV SP, R3
|
|
|
|
BL __iar_init_core
|
|
BL __iar_init_vfp
|
|
/* this part makes the difference with function EntryFromProg */
|
|
BL ComSetDisconnectEntryState
|
|
BL __cmain
|
|
|
|
REQUIRE __vector_table
|
|
|
|
|
|
END
|
|
|
|
/************************************ end of cstart.s **********************************/
|