tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L073RZ/TOOLCHAIN_ARM_STD/sys.cpp

   1 /* mbed Microcontroller Library - stackheap
   2  * Setup a fixed single stack/heap memory model,
   3  * between the top of the RW/ZI region and the stackpointer
   4  *******************************************************************************
   5  * Copyright (c) 2014, STMicroelectronics
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright notice,
  12  *    this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright notice,
  14  *    this list of conditions and the following disclaimer in the documentation
  15  *    and/or other materials provided with the distribution.
  16  * 3. Neither the name of STMicroelectronics nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  26  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  27  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  28  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  *******************************************************************************
  31  */
  32
  33 #ifdef __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 #include <rt_misc.h>
  38 #include <stdint.h>
  39
  40 extern char Image$$RW_IRAM1$$ZI$$Limit[];
  41
  42 extern __value_in_regs struct __initial_stackheap __user_setup_stackheap(uint32_t R0, uint32_t R1, uint32_t R2, uint32_t R3) {
  43     uint32_t zi_limit = (uint32_t)Image$$RW_IRAM1$$ZI$$Limit;
  44     uint32_t sp_limit = __current_sp();
  45
  46     zi_limit = (zi_limit + 7) & ~0x7;    // ensure zi_limit is 8-byte aligned
  47
  48     struct __initial_stackheap r;
  49     r.heap_base = zi_limit;
  50     r.heap_limit = sp_limit;
  51     return r;
  52 }
  53
  54 #ifdef __cplusplus
  55 }
  56 #endif