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;/* File: startup_armv6-m.s

; * Purpose: startup file for armv7-m architecture devices.

; *          Should be used with ARMCC

; * Version: V2.00

; * Date: 16 November 2015

; *

; */

;/* Copyright (c) 2011 - 2014 ARM LIMITED

;

;   All rights reserved.

;   Redistribution and use in source and binary forms, with or without

;   modification, are permitted provided that the following conditions are met:

;   - Redistributions of source code must retain the above copyright

;     notice, this list of conditions and the following disclaimer.

;   - Redistributions in binary form must reproduce the above copyright

;     notice, this list of conditions and the following disclaimer in the

;     documentation and/or other materials provided with the distribution.

;   - Neither the name of ARM nor the names of its contributors may be used

;     to endorse or promote products derived from this software without

;     specific prior written permission.

;   *

;   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

;   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

;   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

;   ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE

;   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

;   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

;   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

;   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

;   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

;   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

;   POSSIBILITY OF SUCH DAMAGE.

;   ---------------------------------------------------------------------------*/

;/*

;  //-------- <<< Use Configuration Wizard in Context Menu >>> ------------------

;*/

; <h> Stack Configuration

;   <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>

; </h>

Stack_Size      EQU     0x00000400

                AREA    STACK, NOINIT, READWRITE, ALIGN=3

Stack_Mem       SPACE   Stack_Size

__initial_sp

; <h> Heap Configuration

;   <o>  Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>

; </h>

Heap_Size       EQU     0x00000C00

                AREA    HEAP, NOINIT, READWRITE, ALIGN=3

__heap_base

Heap_Mem        SPACE   Heap_Size

__heap_limit

                PRESERVE8

                THUMB

; Vector Table Mapped to Address 0 at Reset

                AREA    RESET, DATA, READONLY

                EXPORT  __Vectors

                EXPORT  __Vectors_End

                EXPORT  __Vectors_Size

__Vectors       DCD     __initial_sp              ; Top of Stack

                DCD     Reset_Handler             ; Reset Handler

                DCD     NMI_Handler               ; NMI Handler

                DCD     HardFault_Handler         ; Hard Fault Handler

                DCD     0                         ; Reserved

                DCD     0                         ; Reserved

                DCD     0                         ; Reserved

                DCD     0                         ; Reserved

                DCD     0                         ; Reserved

                DCD     0                         ; Reserved

                DCD     0                         ; Reserved

                DCD     SVC_Handler               ; SVCall Handler

                DCD     0                         ; Reserved

                DCD     0                         ; Reserved

                DCD     PendSV_Handler            ; PendSV Handler

                DCD     SysTick_Handler           ; SysTick Handler

__Vectors_End

__Vectors_Size  EQU     __Vectors_End - __Vectors

                AREA    |.text|, CODE, READONLY

; Reset Handler

Reset_Handler   PROC

                EXPORT  Reset_Handler             [WEAK]

                IMPORT  SystemInit

                IMPORT  __main

                LDR     R0, =SystemInit

                BLX     R0

                LDR     R0, =__main

                BX      R0

                ENDP

; Dummy Exception Handlers (infinite loops which can be modified)

NMI_Handler     PROC

                EXPORT  NMI_Handler               [WEAK]

                BKPT #0

                B       .

                ENDP

HardFault_Handler\

                PROC

                EXPORT  HardFault_Handler         [WEAK]

                BKPT #0

                B       .

                ENDP

SVC_Handler     PROC

                EXPORT  SVC_Handler               [WEAK]

                B       .

                ENDP

PendSV_Handler  PROC

                EXPORT  PendSV_Handler            [WEAK]

                B       .

                ENDP

SysTick_Handler PROC

                EXPORT  SysTick_Handler           [WEAK]

                B       .

                ENDP

                ALIGN

; User Initial Stack & Heap

                IF      :DEF:__MICROLIB

                EXPORT  __initial_sp

                EXPORT  __heap_base

                EXPORT  __heap_limit

                ELSE

                IMPORT  __use_two_region_memory

;/*

;  __user_setup_stackheap() returns the:

;     - heap base in r0 (if the program uses the heap)

;     - stack base in sp

;     - heap limit in r2 (if the program uses the heap and uses two-region memory).

; */

                EXPORT  __user_setup_stackheap

__user_setup_stackheap PROC

                LDR     R0, = __initial_sp

                MOV     SP, R0

				IF Heap_Size > 0

                LDR     R2, = __heap_limit

                LDR     R0, = __heap_base

				ELSE

                MOV     R0, #0

                MOV     R2, #0

                ENDIF

                BX      LR

                ENDP

;/*

;__user_initial_stackheap() returns the:

;   - heap base in r0

;   - stack base in r1, that is, the highest address in the stack region

;   - heap limit in r2

;   - stack limit in r3, that is, the lowest address in the stack region.

; */

;

;/* DEPRICATED

;                EXPORT  __user_initial_stackheap

;

;__user_initial_stackheap PROC

;                LDR     R0, =  Heap_Mem

;                LDR     R1, =(Stack_Mem + Stack_Size)

;                LDR     R2, = (Heap_Mem +  Heap_Size)

;                LDR     R3, = Stack_Mem

;                BX      LR

;                ENDP

; */

                ALIGN

                ENDIF

                END