nuttx/arch/arm/src/dm320/dm320_allocateheap.c

/****************************************************************************
 * arch/arm/src/dm320/dm320_allocateheap.c
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you 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.
 *
 ****************************************************************************/

/****************************************************************************
 * 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 "arm_arch.h"
#include "arm_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;
}