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/************************************************************************
* arch/arm/src/lpc313x/lpc313x_allocateheap.c
*
* Copyright (C) 2009-2010 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 "arm.h"
#include "chip.h"
#include "up_arch.h"
#include "up_internal.h"
#include "lpc313x_memorymap.h"
/************************************************************************
* Pre-processor Definitions
************************************************************************/
/* Configuration ********************************************************/
/* Some sanity checking. If external memory regions are defined, verify
* that CONFIG_MM_REGIONS is set to match, exactly, the number of external
* memory regions that we have been asked to add to the heap.
*/
#if defined(CONFIG_LPC313X_EXTSRAM0) && defined(CONFIG_LPC313X_EXTSRAM0HEAP)
# if defined(CONFIG_LPC313X_EXTSRAM1) && defined(CONFIG_LPC313X_EXTSRAM1HEAP)
# if defined(CONFIG_LPC313X_EXTSDRAM) && defined(CONFIG_LPC313X_EXTSDRAMHEAP)
# /* SRAM+EXTSRAM0+EXTSRAM1+EXTSDRAM */
# define LPC313X_NEXT_REGIONS 4
# else
# /* SRAM+EXTSRAM0+EXTSRAM1 */
# define LPC313X_NEXT_REGIONS 3
# endif
# elif defined(CONFIG_LPC313X_EXTSDRAM) && defined(CONFIG_LPC313X_EXTSDRAMHEAP)
# /* SRAM+EXTSRAM0+EXTSDRAM */
# define LPC313X_NEXT_REGIONS 3
# else
# /* SRAM+EXTSRAM0 */
# define LPC313X_NEXT_REGIONS 2
# endif
#elif defined(CONFIG_LPC313X_EXTSRAM1) && defined(CONFIG_LPC313X_EXTSRAM1HEAP)
# if defined(CONFIG_LPC313X_EXTSDRAM) && defined(CONFIG_LPC313X_EXTSDRAMHEAP)
# /* SRAM+EXTSRAM1+EXTSDRAM */
# define LPC313X_NEXT_REGIONS 3
# else
# /* SRAM+EXTSRAM1 */
# define LPC313X_NEXT_REGIONS 2
# endif
#elif defined(CONFIG_LPC313X_EXTSDRAM) && defined(CONFIG_LPC313X_EXTSDRAMHEAP)
# /* SRAM+EXTSDRAM */
# define LPC313X_NEXT_REGIONS 2
#else
# /* SRAM */
# define LPC313X_NEXT_REGIONS 1
#endif
#if CONFIG_MM_REGIONS != LPC313X_NEXT_REGIONS
# if CONFIG_MM_REGIONS < LPC313X_NEXT_REGIONS
# error "CONFIG_MM_REGIONS is large enough for the selected memory regions"
# else
# error "CONFIG_MM_REGIONS is too large for the selected memory regions"
# endif
# if defined(CONFIG_LPC313X_EXTSRAM0) && defined(CONFIG_LPC313X_EXTSRAM0HEAP)
# error "External SRAM0 is selected for heap"
# endif
# if defined(CONFIG_LPC313X_EXTSRAM1) && defined(CONFIG_LPC313X_EXTSRAM1HEAP)
# error "External SRAM1 is selected for heap"
# endif
# if defined(CONFIG_LPC313X_EXTSDRAM) && defined(CONFIG_LPC313X_EXTSDRAMHEAP)
# error "External SRAM1 is selected for heap"
# endif
#endif
/* The following determines the end+1 address the heap (in SRAM0 or SRAM1)
* and that, in turn, determines the size of the heap. Specifically, this
* logic it checks if a page table has been allocated at the end of SRAM
* and, if so, subtracts that the size of the page table from the end+1
* address of heap.
*
* If the page table was not allocated at the end of SRAM, then this logic
* will let the heap run all the way to the end of SRAM.
*/
#ifdef PGTABLE_IN_HIGHSRAM
# define LPC313X_HEAP_VEND (LPC313X_INTSRAM_VSECTION + LPC313X_ISRAM_SIZE - PGTABLE_SIZE)
#else
# define LPC313X_HEAP_VEND (LPC313X_INTSRAM_VSECTION + LPC313X_ISRAM_SIZE)
#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 to the end
* of SRAM.
*
* SRAM layout:
* Start of SRAM: .data
* .bss
* IDLE thread stack
* End of SRAm: heap
*
* NOTE: Ignore the erroneous nomenclature DRAM and SDRAM. That names
* date back to an earlier platform that had SDRAM.
*
************************************************************************/
void up_allocate_heap(FAR void **heap_start, size_t *heap_size)
{
up_ledon(LED_HEAPALLOCATE);
*heap_start = (FAR void*)g_heapbase;
*heap_size = LPC313X_HEAP_VEND - 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)
{
#if defined(CONFIG_LPC313X_EXTSRAM0) && defined(CONFIG_LPC313X_EXTSRAM0HEAP)
mm_addregion((FAR void*)LPC313X_EXTSRAM0_VSECTION, CONFIG_LPC313X_EXTSRAM0SIZE);
#endif
#if defined(CONFIG_LPC313X_EXTSRAM1) && defined(CONFIG_LPC313X_EXTSRAM1HEAP)
mm_addregion((FAR void*)LPC313X_EXTSRAM1_VSECTION, CONFIG_LPC313X_EXTSRAM1SIZE);
#endif
#if defined(CONFIG_LPC313X_EXTSDRAM) && defined(CONFIG_LPC313X_EXTSDRAMHEAP)
mm_addregion((FAR void*)LPC313X_EXTSDRAM_VSECTION, CONFIG_LPC313X_EXTSDRAMSIZE);
#endif
}
#endif
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