text: /****************************************************************************
   * dm320/dm320_allocateheap.c
   *
   *   Copyright (C) 2007, 2013, 2015 Gregory Nutt. All rights reserved.
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. 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.
   * 3. Neither the name Gregory Nutt 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 THE
   * COPYRIGHT OWNER OR 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.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  #include <sys/types.h>
  #include <debug.h>
  
  #include <nuttx/arch.h>
  #include <nuttx/board.h>
  #include <arch/board/board.h>
  
  #include "chip.h"
  #include "up_arch.h"
  #include "up_internal.h"
  
  /****************************************************************************
   * Pre-processor Definitions
   ****************************************************************************/
  
  /****************************************************************************
   * Private Data
   ****************************************************************************/
  
  /****************************************************************************
   * Private Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: up_allocate_heap
   *
   * Description:
   *   This function will be called to dynamically set aside
   *   the heap region.
   *
   *   For the kernel build (CONFIG_BUILD_KERNEL=y) with both
   *   kernel- and user-space heaps (CONFIG_MM_KERNEL_HEAP=y),
   *   this function provides the size of the unprotected,
   *   user-space heap.
   *
   *   If a protected kernel-space heap is provided, the kernel
   *   heap must be allocated (and protected) by an analogous
   *   up_allocate_kheap().
   *
   ****************************************************************************/
  
  void up_allocate_heap(FAR void **heap_start, size_t *heap_size)
  {
    board_autoled_on(LED_HEAPALLOCATE);
    *heap_start = (FAR void *)g_idle_topstack;
    *heap_size  = (DM320_SDRAM_VADDR + CONFIG_RAM_SIZE) - g_idle_topstack;
  }
  