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/*
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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 ARMCMx/compilers/IAR/cstartup.s
* @brief Generic IAR Cortex-Mx startup file.
*
* @addtogroup ARMCMx_IAR_STARTUP
* @{
*/
#if !defined(__DOXYGEN__)
#define SCB_VTOR 0xE000ED08
/**
* @brief VTOR special register initialization.
* @details VTOR is initialized to point to the vectors table.
* @note IAR assembler #if directive conditions do not work like C/C++ conditions.
* @details Set to 0 to disable the function, 1 to enable
*/
#ifndef CRT0_VTOR_INIT
#define CRT0_VTOR_INIT 1
#endif
/**
* @brief Stack segments initialization value.
*/
#ifndef CRT0_STACKS_FILL_PATTERN
#define CRT0_STACKS_FILL_PATTERN 0x55555555
#endif
/**
* @brief Stack segments initialization switch.
* @details Set to 0 to disable the function, 1 to enable
*/
#ifndef CRT0_INIT_STACKS
#define CRT0_INIT_STACKS 1
#endif
/**
* @brief Heap segment initialization value.
*/
#ifndef CRT0_HEAP_FILL_PATTERN
#define CRT0_HEAP_FILL_PATTERN 0xCCCCCCCC
#endif
/**
* @brief Heap segment initialization switch.
* @details Set to 0 to disable the function, 1 to enable
*/
#ifndef CRT0_INIT_HEAP
#define CRT0_INIT_HEAP 1
#endif
MODULE ?cstartup
CONTROL_MODE_PRIVILEGED SET 0
CONTROL_MODE_UNPRIVILEGED SET 1
CONTROL_USE_MSP SET 0
CONTROL_USE_PSP SET 2
AAPCS INTERWORK, VFP_COMPATIBLE, ROPI
PRESERVE8
SECTION HEAP:DATA:NOROOT(3)
PUBLIC __heap_base__
__heap_base__: /* Note: heap section defines sysheap base */
SECTION SYSHEAP:DATA:NOROOT(3)
PUBLIC __heap_end__
__heap_end__: /* Note: sysheap section defines sysheap end */
PUBLIC __iar_program_start
EXTWEAK __iar_init_core
EXTWEAK __iar_init_vfp
EXTERN __cmain
EXTERN __vector_table
EXTERN __main_stack_base__
EXTERN __main_stack_end__
EXTERN __process_stack_base__
EXTERN __process_stack_end__
SECTION IRQSTACK:DATA:NOROOT(3)
SECTION CSTACK:DATA:NOROOT(3)
SECTION .text:CODE:REORDER(2)
THUMB
__iar_program_start:
cpsid i
ldr r0, =SFE(IRQSTACK)
msr MSP, r0
ldr r0, =SFE(CSTACK)
msr PSP, r0
movs r0, #CONTROL_MODE_PRIVILEGED | CONTROL_USE_PSP
msr CONTROL, r0
isb
#if (CRT0_VTOR_INIT)
ldr r0, =__vector_table
movw r1, #SCB_VTOR & 0xFFFF
movt r1, #SCB_VTOR >> 16
str r0, [r1]
#endif
#if (CRT0_INIT_STACKS)
ldr r0, =CRT0_STACKS_FILL_PATTERN
/* Main Stack initialization. Note, it assumes that the stack size
is a multiple of 4 so the linker file must ensure this.*/
ldr r1, =__main_stack_base__
ldr r2, =__main_stack_end__
msloop:
cmp r1, r2
itt lo
strlo r0, [r1], #4
blo msloop
/* Process Stack initialization. Note, it assumes that the stack size
is a multiple of 4 so the linker file must ensure this.*/
ldr r1, =__process_stack_base__
ldr r2, =__process_stack_end__
psloop:
cmp r1, r2
itt lo
strlo r0, [r1], #4
blo psloop
#endif
#if (CRT0_INIT_HEAP)
ldr r0, =CRT0_HEAP_FILL_PATTERN
/* Sys Heap initialization. Note, it assumes that the heap size
is a multiple of 4 so the linker file must ensure this.*/
ldr r1, =__heap_base__
ldr r2, =__heap_end__
hloop:
cmp r1, r2
itt lo
strlo r0, [r1], #4
blo hloop
#endif
bl __early_init
bl __iar_init_core
bl __iar_init_vfp
b __cmain
SECTION .text:CODE:NOROOT:REORDER(2)
PUBWEAK __early_init
__early_init:
bx lr
END
#endif /* !defined(__DOXYGEN__) */
/**< @} */
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