/****************************************************************************
* arch/arm/src/stm32/up_allocateheap.c
*
* Copyright (C) 2011 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/mm.h>
#include <arch/board/board.h>
#include "chip.h"
#include "up_arch.h"
#include "up_internal.h"
/****************************************************************************
* Private Definitions
****************************************************************************/
/* For the STM312F10xxx family, all SRAM is in a contiguous block starting
* at g_heapbase and extending through CONFIG_DRAM_END (my apologies for
* the bad naming).
*/
#if defined(CONFIG_STM32_STM32F10XX)
# define SRAM1_END CONFIG_DRAM_END
/* All members of the STM32F40xxx family have 192Kb in three banks:
*
* 1) 112Kb of SRAM beginning at address 0x2000:0000
* 2) 16Kb of SRAM beginning at address 0x2001:c000
* 3) 64Kb of TCM SRAM beginning at address 0x1000:0000
*
* As determined by ld.script, g_heapbase lies in the 112Kb memory
* region and that extends to 0x2001:0000. But the first and second memory
* regions are contiguous and treated as one in this logic that extends to
* 0x2002:0000.
*/
#elif defined(CONFIG_STM32_STM32F40XX)
# define SRAM1_END 0x20020000
# define SRAM2_START 0x10000000
# define SRAM2_END 0x10010000
#else
# error "Unsupported STM32 chip"
#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 = SRAM1_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
# if defined(CONFIG_STM32_STM32F40XX)
# if defined(CONFIG_HEAP2_BASE) && defined(CONFIG_HEAP2_END)
# if CONFIG_MM_REGIONS > 3
# error "CONFIG_MM_REGIONS > 3 but I don't know what all of the regions are"
# endif
# elif CONFIG_MM_REGIONS > 2
# error "CONFIG_MM_REGIONS > 2 but I don't know what all of the regions are"
# endif
void up_addregion(void)
{
/* Add the STM32F40xxx TCM SRAM heap region. */
mm_addregion((FAR void*)SRAM2_START, SRAM2_END-SRAM2_START);
/* Add the user specified heap region. */
# if CONFIG_MM_REGIONS > 2 && defined(CONFIG_HEAP2_BASE) && defined(CONFIG_HEAP2_END)
mm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_END - CONFIG_HEAP2_BASE);
# endif
}
# elif defined(CONFIG_HEAP2_BASE) && defined(CONFIG_HEAP2_END)
# if CONFIG_MM_REGIONS > 2
# error "CONFIG_MM_REGIONS > 2 but I don't know what all of the regions are"
# endif
void up_addregion(void)
{
/* Add the user specified heap region. */
mm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_END - CONFIG_HEAP2_BASE);
}
# else
# error "CONFIG_MM_REGIONS > 1 but I don't know what any of the region(s) are"
# endif
#endif
