tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC408X/TOOLCHAIN_ARM_STD/sys.cpp

   1 /* mbed Microcontroller Library - stackheap
   2  * Copyright (C) 2009-2011 ARM Limited. All rights reserved.
   3  *
   4  * Setup a fixed single stack/heap memory model,
   5  *  between the top of the RW/ZI region and the stackpointer
   6  */
   7
   8 #ifdef __cplusplus
   9 extern "C" {
  10 #endif
  11
  12 #include <rt_misc.h>
  13 #include <stdint.h>
  14 #include "sys_helper.h"
  15
  16 extern char Image$$RW_IRAM1$$ZI$$Limit[];
  17
  18 extern __value_in_regs struct __initial_stackheap __user_setup_stackheap(uint32_t R0, uint32_t R1, uint32_t R2, uint32_t R3) {
  19     uint32_t zi_limit = (uint32_t)Image$$RW_IRAM1$$ZI$$Limit;
  20     uint32_t sp_limit = __current_sp();
  21
  22     zi_limit = (zi_limit + 7) & ~0x7;    // ensure zi_limit is 8-byte aligned
  23
  24     struct __initial_stackheap r;
  25     r.heap_base = zi_limit;
  26     r.heap_limit = sp_limit - __reserved_stack_size();
  27     return r;
  28 }
  29
  30 #ifdef __cplusplus
  31 }
  32 #endif