/************************************************************************
* arch/arm/src/lpc31xx/lpc31_allocateheap.c
*
* Copyright (C) 2009-2010, 2013 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 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 <nuttx/kmalloc.h>
#include <arch/board/board.h>
#include "arm.h"
#include "chip.h"
#include "up_arch.h"
#include "up_internal.h"
#include "lpc31_memorymap.h"
#ifdef CONFIG_PAGING
# include <nuttx/page.h>
# include "pg_macros.h"
#endif
/************************************************************************
* 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_LPC31_EXTSRAM0) && defined(CONFIG_LPC31_EXTSRAM0HEAP)
# if defined(CONFIG_LPC31_EXTSRAM1) && defined(CONFIG_LPC31_EXTSRAM1HEAP)
# if defined(CONFIG_LPC31_EXTDRAM) && defined(CONFIG_LPC31_EXTDRAMHEAP)
# /* SRAM+EXTSRAM0+EXTSRAM1+EXTSDRAM */
# define LPC31_NEXT_REGIONS 4
# else
# /* SRAM+EXTSRAM0+EXTSRAM1 */
# define LPC31_NEXT_REGIONS 3
# endif
# elif defined(CONFIG_LPC31_EXTDRAM) && defined(CONFIG_LPC31_EXTDRAMHEAP)
# /* SRAM+EXTSRAM0+EXTSDRAM */
# define LPC31_NEXT_REGIONS 3
# else
# /* SRAM+EXTSRAM0 */
# define LPC31_NEXT_REGIONS 2
# endif
#elif defined(CONFIG_LPC31_EXTSRAM1) && defined(CONFIG_LPC31_EXTSRAM1HEAP)
# if defined(CONFIG_LPC31_EXTDRAM) && defined(CONFIG_LPC31_EXTDRAMHEAP)
# /* SRAM+EXTSRAM1+EXTSDRAM */
# define LPC31_NEXT_REGIONS 3
# else
# /* SRAM+EXTSRAM1 */
# define LPC31_NEXT_REGIONS 2
# endif
#elif defined(CONFIG_LPC31_EXTDRAM) && defined(CONFIG_LPC31_EXTDRAMHEAP)
# /* SRAM+EXTSDRAM */
# define LPC31_NEXT_REGIONS 2
#else
# /* SRAM */
# define LPC31_NEXT_REGIONS 1
#endif
#if CONFIG_MM_REGIONS != LPC31_NEXT_REGIONS
# if CONFIG_MM_REGIONS < LPC31_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_LPC31_EXTSRAM0) && defined(CONFIG_LPC31_EXTSRAM0HEAP)
# error "External SRAM0 is selected for heap"
# endif
# if defined(CONFIG_LPC31_EXTSRAM1) && defined(CONFIG_LPC31_EXTSRAM1HEAP)
# error "External SRAM1 is selected for heap"
# endif
# if defined(CONFIG_LPC31_EXTDRAM) && defined(CONFIG_LPC31_EXTDRAMHEAP)
# error "External DRAM 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 CONFIG_PAGING
# ifdef PGTABLE_IN_HIGHSRAM
# define LPC31_HEAP_VEND (PG_LOCKED_VBASE + PG_TOTAL_VSIZE - PGTABLE_SIZE)
# else
# define LPC31_HEAP_VEND (PG_LOCKED_VBASE + PG_TOTAL_VSIZE)
# endif
#else
# ifdef PGTABLE_IN_HIGHSRAM
# define LPC31_HEAP_VEND (LPC31_INTSRAM_VSECTION + LPC31_ISRAM_SIZE - PGTABLE_SIZE)
# else
# define LPC31_HEAP_VEND (LPC31_INTSRAM_VSECTION + LPC31_ISRAM_SIZE)
# endif
#endif
/************************************************************************
* 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().
*
* 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)
{
board_led_on(LED_HEAPALLOCATE);
*heap_start = (FAR void*)g_idle_topstack;
*heap_size = LPC31_HEAP_VEND - g_idle_topstack;
}
/************************************************************************
* 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_LPC31_EXTSRAM0) && defined(CONFIG_LPC31_EXTSRAM0HEAP)
kmm_addregion((FAR void*)LPC31_EXTSRAM0_VSECTION, CONFIG_LPC31_EXTSRAM0SIZE);
#endif
#if defined(CONFIG_LPC31_EXTSRAM1) && defined(CONFIG_LPC31_EXTSRAM1HEAP)
kmm_addregion((FAR void*)LPC31_EXTSRAM1_VSECTION, CONFIG_LPC31_EXTSRAM1SIZE);
#endif
#if defined(CONFIG_LPC31_EXTDRAM) && defined(CONFIG_LPC31_EXTDRAMHEAP)
kmm_addregion((FAR void*)LPC31_EXTSDRAM_VSECTION, CONFIG_LPC31_EXTDRAMSIZE);
#endif
}
#endif
