385 lines
12 KiB
C
385 lines
12 KiB
C
/****************************************************************************
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* arch/arm/src/common/sam_allocateheap.c
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*
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* Copyright (C) 2010, 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/kmalloc.h>
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#include <arch/board/board.h>
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#include "mpu.h"
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#include "up_arch.h"
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#include "up_internal.h"
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#include "chip.h"
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#include "sam_mpuinit.h"
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#include "sam_periphclks.h"
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/****************************************************************************
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* Private Definitions
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****************************************************************************/
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/* All SAM's have SRAM0. The SAM3U family also have SRAM1 and possibly
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* NFCSRAM. NFCSRAM may not be used, however, if NAND support is enabled.
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* In addition, the SAM3U and SAM4S have external SRAM at CS0 (EXTSRAM0).
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* Support for external SRAM at CS1-3 is not fully implemented.
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*/
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#undef HAVE_SRAM1_REGION /* Assume no internal SRAM1 */
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#undef HAVE_NFCSRAM_REGION /* Assume no NFC SRAM */
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#undef HAVE_EXTSRAM0_REGION /* Assume no external SRAM at CS0 */
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#undef HAVE_EXTSRAM1_REGION /* Assume no external SRAM at CS1 */
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#undef HAVE_EXTSRAM2_REGION /* Assume no external SRAM at CS2 */
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#undef HAVE_EXTSRAM3_REGION /* Assume no external SRAM at CS3 */
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/* Check if external SRAM is supported and, if so, it is is intended
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* to be used as heap.
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*/
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#if !defined(CONFIG_SAM34_EXTSRAM0) || !defined(CONFIG_SAM34_EXTSRAM0HEAP)
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# undef CONFIG_SAM34_EXTSRAM0SIZE
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# define CONFIG_SAM34_EXTSRAM0SIZE 0
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#endif
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#if !defined(CONFIG_SAM34_EXTSRAM1) || !defined(CONFIG_SAM34_EXTSRAM1HEAP)
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# undef CONFIG_SAM34_EXTSRAM1SIZE
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# define CONFIG_SAM34_EXTSRAM1SIZE 0
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#endif
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#if !defined(CONFIG_SAM34_EXTSRAM2) || !defined(CONFIG_SAM34_EXTSRAM2HEAP)
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# undef CONFIG_SAM34_EXTSRAM2SIZE
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# define CONFIG_SAM34_EXTSRAM2SIZE 0
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#endif
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#if !defined(CONFIG_SAM34_EXTSRAM3) || !defined(CONFIG_SAM34_EXTSRAM3HEAP)
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# undef CONFIG_SAM34_EXTSRAM3SIZE
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# define CONFIG_SAM34_EXTSRAM3SIZE 0
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#endif
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/* SAM3U, SAM3X, and SAM3A Unique memory configurations */
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#if defined(CONFIG_ARCH_CHIP_SAM3U) || defined(CONFIG_ARCH_CHIP_SAM3X) || \
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defined(CONFIG_ARCH_CHIP_SAM3A)
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# ifdef CONFIG_SAM34_NAND
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# undef SAM34_NFCSRAM_SIZE
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# define SAM34_NFCSRAM_SIZE 0
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# endif
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# if SAM34_SRAM1_SIZE > 0
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# if CONFIG_MM_REGIONS > 1
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# define HAVE_SRAM1_REGION 1
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# else
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# warning "CONFIG_MM_REGIONS < 2: SRAM1 not included in HEAP"
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# endif
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# endif
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# if SAM34_NFCSRAM_SIZE > 0
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# if CONFIG_MM_REGIONS > 2
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# define HAVE_NFCSRAM_REGION
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# else
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# warning "CONFIG_MM_REGIONS < 3: NFC SRAM not included in HEAP"
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# endif
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# if CONFIG_SAM34_EXTSRAM0SIZE > 0
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# if CONFIG_MM_REGIONS > 3
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# define HAVE_EXTSRAM0_REGION 1
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# else
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# warning "CONFIG_MM_REGIONS < 4: External SRAM not included in HEAP"
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# endif
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# endif
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# elif CONFIG_SAM34_EXTSRAM0SIZE > 0
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# if CONFIG_MM_REGIONS > 2
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# define HAVE_EXTSRAM0_REGION 1
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# else
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# warning "CONFIG_MM_REGIONS < 3: External SRAM not included in HEAP"
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# endif
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# endif
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#else
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/* The SAM4S and SAM4L may have only internal SRAM0 and external SRAM0 */
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# if CONFIG_SAM34_EXTSRAM0SIZE > 0
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# if CONFIG_MM_REGIONS > 1
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# define HAVE_EXTSRAM0_REGION 1
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# else
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# warning "CONFIG_MM_REGIONS < 2: External SRAM not included in HEAP"
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# endif
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# endif
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#endif
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/* Check common SRAM0 configuration */
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#if CONFIG_RAM_END > (SAM_INTSRAM0_BASE+SAM34_SRAM0_SIZE)
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# error "CONFIG_RAM_END is beyond the end of SRAM0"
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# undef CONFIG_RAM_END
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# define CONFIG_RAM_END (SAM_INTSRAM0_BASE+SAM34_SRAM0_SIZE)
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#elif CONFIG_RAM_END < (SAM_INTSRAM0_BASE+SAM34_SRAM0_SIZE)
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# warning "CONFIG_RAM_END is before end of SRAM0... not all of SRAM0 used"
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_allocate_heap
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*
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* Description:
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* This function will be called to dynamically set aside the heap region.
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*
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* For the kernel build (CONFIG_NUTTX_KERNEL=y) with both kernel- and
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* user-space heaps (CONFIG_MM_KERNEL_HEAP=y), this function provides the
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* size of the unprotected, user-space heap.
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*
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* If a protected kernel-space heap is provided, the kernel heap must be
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* allocated (and protected) by an analogous up_allocate_kheap().
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*
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* The following memory map is assumed for the flat build:
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*
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* .data region. Size determined at link time.
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* .bss region Size determined at link time.
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* IDLE thread stack. Size determined by CONFIG_IDLETHREAD_STACKSIZE.
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* Heap. Extends to the end of SRAM.
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*
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* The following memory map is assumed for the kernel build:
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*
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* Kernel .data region. Size determined at link time.
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* Kernel .bss region Size determined at link time.
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* Kernel IDLE thread stack. Size determined by CONFIG_IDLETHREAD_STACKSIZE.
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* Padding for alignment
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* User .data region. Size determined at link time.
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* User .bss region Size determined at link time.
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* Kernel heap. Size determined by CONFIG_MM_KERNEL_HEAPSIZE.
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* User heap. Extends to the end of SRAM.
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*
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****************************************************************************/
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void up_allocate_heap(FAR void **heap_start, size_t *heap_size)
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{
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#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP)
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/* Get the unaligned size and position of the user-space heap.
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* This heap begins after the user-space .bss section at an offset
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* of CONFIG_MM_KERNEL_HEAPSIZE (subject to alignment).
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*/
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uintptr_t ubase = (uintptr_t)USERSPACE->us_bssend + CONFIG_MM_KERNEL_HEAPSIZE;
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size_t usize = CONFIG_RAM_END - ubase;
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int log2;
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DEBUGASSERT(ubase < (uintptr_t)CONFIG_RAM_END);
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/* Adjust that size to account for MPU alignment requirements.
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* NOTE that there is an implicit assumption that the CONFIG_RAM_END
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* is aligned to the MPU requirement.
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*/
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log2 = (int)mpu_log2regionfloor(usize);
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DEBUGASSERT((CONFIG_RAM_END & ((1 << log2) - 1)) == 0);
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usize = (1 << log2);
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ubase = CONFIG_RAM_END - usize;
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/* Return the user-space heap settings */
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board_led_on(LED_HEAPALLOCATE);
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*heap_start = (FAR void*)ubase;
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*heap_size = usize;
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/* Allow user-mode access to the user heap memory */
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sam_mpu_uheap((uintptr_t)ubase, usize);
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#else
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/* Return the heap settings */
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board_led_on(LED_HEAPALLOCATE);
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*heap_start = (FAR void*)g_idle_topstack;
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*heap_size = CONFIG_RAM_END - g_idle_topstack;
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#endif
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}
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/****************************************************************************
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* Name: up_allocate_kheap
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*
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* Description:
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* For the kernel build (CONFIG_NUTTX_KERNEL=y) with both kernel- and
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* user-space heaps (CONFIG_MM_KERNEL_HEAP=y), this function allocates
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* (and protects) the kernel-space heap.
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*
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****************************************************************************/
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#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP)
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void up_allocate_kheap(FAR void **heap_start, size_t *heap_size)
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{
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/* Get the unaligned size and position of the user-space heap.
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* This heap begins after the user-space .bss section at an offset
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* of CONFIG_MM_KERNEL_HEAPSIZE (subject to alignment).
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*/
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uintptr_t ubase = (uintptr_t)USERSPACE->us_bssend + CONFIG_MM_KERNEL_HEAPSIZE;
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size_t usize = CONFIG_RAM_END - ubase;
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int log2;
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DEBUGASSERT(ubase < (uintptr_t)CONFIG_RAM_END);
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/* Adjust that size to account for MPU alignment requirements.
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* NOTE that there is an implicit assumption that the CONFIG_RAM_END
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* is aligned to the MPU requirement.
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*/
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log2 = (int)mpu_log2regionfloor(usize);
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DEBUGASSERT((CONFIG_RAM_END & ((1 << log2) - 1)) == 0);
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usize = (1 << log2);
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ubase = CONFIG_RAM_END - usize;
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/* Return the kernel heap settings (i.e., the part of the heap region
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* that was not dedicated to the user heap).
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*/
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*heap_start = (FAR void*)USERSPACE->us_bssend;
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*heap_size = ubase - (uintptr_t)USERSPACE->us_bssend;
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}
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#endif
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/************************************************************************
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* Name: up_addregion
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*
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* Description:
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* Memory may be added in non-contiguous chunks. Additional chunks are
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* added by calling this function.
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*
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************************************************************************/
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#if CONFIG_MM_REGIONS > 1
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void up_addregion(void)
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{
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/* The SAM3U also have SRAM1 and NFCSRAM, We will add these as regions
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* the first two additional memory regions if we have them.
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*/
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#ifdef HAVE_SRAM1_REGION
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/* Allow user access to the heap memory */
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sam_mpu_uheap(SAM_INTSRAM1_BASE, SAM34_SRAM1_SIZE);
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/* Add the region */
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kumm_addregion((FAR void*)SAM_INTSRAM1_BASE, SAM34_SRAM1_SIZE);
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#endif /* HAVE_SRAM1_REGION */
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#ifdef HAVE_NFCSRAM_REGION
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#if defined(CONFIG_ARCH_CHIP_SAM3X) || defined(CONFIG_ARCH_CHIP_SAM3A)
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/* In the 3X/3A family I note that clocking must appled to the SMC module
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* in order for the NFCS SRAM to be functional. I don't recall such an
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* issue with the 3U.
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*/
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sam_smc_enableclk();
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#endif
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/* Allow user access to the heap memory */
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sam_mpu_uheap(SAM_NFCSRAM_BASE, SAM34_NFCSRAM_SIZE);
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/* Add the region */
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kumm_addregion((FAR void*)SAM_NFCSRAM_BASE, SAM34_NFCSRAM_SIZE);
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#endif /* HAVE_NFCSRAM_REGION */
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#ifdef HAVE_EXTSRAM0_REGION
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/* Allow user access to the heap memory */
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sam_mpu_uheap(SAM_EXTCS0_BASE, CONFIG_SAM34_EXTSRAM0SIZE);
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/* Add the region */
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kumm_addregion((FAR void*)SAM_EXTCS0_BASE, CONFIG_SAM34_EXTSRAM0SIZE);
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#endif /* HAVE_EXTSRAM0_REGION */
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#ifdef HAVE_EXTSRAM1_REGION
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/* Allow user access to the heap memory */
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sam_mpu_uheap(SAM_EXTCS1_BASE, CONFIG_SAM34_EXTSRAM1SIZE);
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/* Add the region */
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kumm_addregion((FAR void*)SAM_EXTCS1_BASE, CONFIG_SAM34_EXTSRAM1SIZE);
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#endif /* HAVE_EXTSRAM0_REGION */
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#ifdef HAVE_EXTSRAM2_REGION
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/* Allow user access to the heap memory */
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sam_mpu_uheap(SAM_EXTCS2_BASE, CONFIG_SAM34_EXTSRAM2SIZE);
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/* Add the region */
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kumm_addregion((FAR void*)SAM_EXTCS2_BASE, CONFIG_SAM34_EXTSRAM2SIZE);
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#endif /* HAVE_EXTSRAM0_REGION */
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#ifdef HAVE_EXTSRAM3_REGION
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/* Allow user access to the heap memory */
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sam_mpu_uheap(SAM_EXTCS3_BASE, CONFIG_SAM34_EXTSRAM3SIZE);
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/* Add the region */
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kumm_addregion((FAR void*)SAM_EXTCS3_BASE, CONFIG_SAM34_EXTSRAM3SIZE);
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#endif /* HAVE_EXTSRAM0_REGION */
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}
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#endif /* CONFIG_MM_REGIONS > 1 */
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