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/****************************************************************************
* arch/arm/src/lpc17xx/lpc17_allocateheap.c
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 NuttX 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 <arch/board/board.h>
#include "chip.h"
#include "up_arch.h"
#include "up_internal.h"
#include "lpc17_memorymap.h"
/****************************************************************************
* Private Definitions
****************************************************************************/
/* Configuration ************************************************************/
#if CONFIG_DRAM_START != LPC17_SRAM_BASE
# warning "CONFIG_DRAM_START is not at LPC17_SRAM_BASE"
# undef CONFIG_DRAM_START
# undef CONFIG_DRAM_END
# define CONFIG_DRAM_START LPC17_SRAM_BASE
# define CONFIG_DRAM_END (LPC17_SRAM_BASE+LPC17_CPUSRAM_SIZE)
#endif
#if CONFIG_DRAM_SIZE > LPC17_CPUSRAM_SIZE
# warning "CONFIG_DRAM_SIZE is larger than the size of CPU SRAM"
# undef CONFIG_DRAM_SIZE
# undef CONFIG_DRAM_END
# define CONFIG_DRAM_SIZE LPC17_CPUSRAM_SIZE
# define CONFIG_DRAM_END (LPC17_SRAM_BASE+LPC17_CPUSRAM_SIZE)
#elif CONFIG_DRAM_SIZE < LPC17_CPUSRAM_SIZE
# warning "CONFIG_DRAM_END is before end of CPU SRAM... not all of CPU SRAM used"
#endif
#ifdef LPC17_HAVE_BANK0
# if CONFIG_MM_REGIONS < 2
# warning "CONFIG_MM_REGIONS < 2: AHB SRAM Bank(s) not included in HEAP"
# endif
#else
# if CONFIG_MM_REGIONS > 1
# warning "CONFIG_MM_REGIONS > 1: This MCU has no AHB SRAM Bank0/1"
# endif
#endif
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_allocate_heap
*
* Description:
* The heap may be statically allocated by
* defining CONFIG_HEAP_BASE and CONFIG_HEAP_SIZE. If these
* are not defined, then this function will be called to
* dynamically set aside the heap region.
*
****************************************************************************/
void up_allocate_heap(FAR void **heap_start, size_t *heap_size)
{
up_ledon(LED_HEAPALLOCATE);
*heap_start = (FAR void*)g_heapbase;
*heap_size = CONFIG_DRAM_END - g_heapbase;
}
/************************************************************************
* Name: up_addregion
*
* Description:
* Memory may be added in non-contiguous chunks. Additional chunks are
* added by calling this function.
*
************************************************************************/
#if CONFIG_MM_REGIONS > 1
void up_addregion(void)
{
/* Banks 0 and 1 are each 16Kb. If both are present, they occupy a
* contiguous 32Kb memory region.
*/
#ifdef LPC17_HAVE_BANK0
# ifdef LPC17_HAVE_BANK1
mm_addregion((FAR void*)LPC17_SRAM_BANK0, 32*1024);
# else
mm_addregion((FAR void*)LPC17_SRAM_BANK0, 16*1024);
# endif
#endif
}
#endif
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