633 lines
21 KiB
C
633 lines
21 KiB
C
/****************************************************************************
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* arch/arm/src/stm32/up_allocateheap.c
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*
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* Copyright (C) 2011-2013, 2015 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 <stdint.h>
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#include <string.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/board.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/userspace.h>
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#include <arch/board/board.h>
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#include "chip.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 "stm32_mpuinit.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Internal SRAM is available in all members of the STM32 family. The
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* following definitions must be provided to specify the size and
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* location of internal(system) SRAM:
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*
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* CONFIG_RAM_END : End address (+1) of SRAM (F1 family only, the
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* : F4 family uses the a priori end of SRAM)
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*
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* The F4 family also contains internal CCM SRAM. This SRAM is different
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* because it cannot be used for DMA. So if DMA needed, then the following
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* should be defined to exclude CCM SRAM from the heap:
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*
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* CONFIG_STM32_CCMEXCLUDE : Exclude CCM SRAM from the HEAP
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*
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* In addition to internal SRAM, SRAM may also be available through the FSMC.
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* In order to use FSMC SRAM, the following additional things need to be
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* present in the NuttX configuration file:
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*
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* CONFIG_STM32_FSMC=y : Enables the FSMC
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* CONFIG_STM32_FSMC_SRAM=y : Indicates that SRAM is available via the
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* FSMC (as opposed to an LCD or FLASH).
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* CONFIG_HEAP2_BASE : The base address of the SRAM in the FSMC
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* address space
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* CONFIG_HEAP2_SIZE : The size of the SRAM in the FSMC
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* address space
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* CONFIG_MM_REGIONS : Must be set to a large enough value to
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* include the FSMC SRAM (as determined by
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* the rules provided below)
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*/
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#ifndef CONFIG_STM32_FSMC
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# undef CONFIG_STM32_FSMC_SRAM
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#endif
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/* The STM32L15xxx family has only internal SRAM. The heap is in one contiguous
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* block starting at g_idle_topstack and extending through CONFIG_RAM_END.
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*/
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#if defined(CONFIG_STM32_STM32L15XX)
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/* Set the end of system SRAM */
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# define SRAM1_END CONFIG_RAM_END
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/* There is no FSMC (Other EnergyLite STM32's do have an FSMC, but not the STM32L15X */
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# undef CONFIG_STM32_FSMC_SRAM
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/* The STM32L EnergyLite family has no CCM SRAM */
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# undef CONFIG_STM32_CCMEXCLUDE
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# define CONFIG_STM32_CCMEXCLUDE 1
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/* Only one memory region can be support (internal SRAM) */
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# if CONFIG_MM_REGIONS > 1
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# error "CONFIG_MM_REGIONS > 1. The STM32L15X has only one memory region."
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# endif
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/* For the STM312F10xxx family, all internal SRAM is in one contiguous block
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* starting at g_idle_topstack and extending through CONFIG_RAM_END (my apologies
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* for the bad naming). In addition, external FSMC SRAM may be available.
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*/
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#elif defined(CONFIG_STM32_STM32F10XX)
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/* Set the end of system SRAM */
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# define SRAM1_END CONFIG_RAM_END
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/* Check if external FSMC SRAM is provided */
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# ifdef CONFIG_STM32_FSMC_SRAM
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# if CONFIG_MM_REGIONS < 2
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# warning "FSMC SRAM not included in the heap"
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# undef CONFIG_STM32_FSMC_SRAM
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# elif CONFIG_MM_REGIONS > 2
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# error "CONFIG_MM_REGIONS > 2 but I don't know what some of the region(s) are"
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# undef CONFIG_MM_REGIONS
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# define CONFIG_MM_REGIONS 2
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# endif
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# elif CONFIG_MM_REGIONS > 1
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# error "CONFIG_MM_REGIONS > 1 but I don't know what the other region(s) are"
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# endif
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/* The STM32 F1 has no CCM SRAM */
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# undef CONFIG_STM32_CCMEXCLUDE
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# define CONFIG_STM32_CCMEXCLUDE 1
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/* Members of the STM32F30xxx family has a variable amount of SRAM from 24
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* to 40Kb plus 8KB if CCM SRAM. No external RAM is supported (the F3 family
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* has no FSMC).
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*
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* As a complication, CCM SRAM cannot be used for DMA. So, if STM32 DMA is
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* enabled, CCM SRAM should probably be excluded from the heap.
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*/
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#elif defined(CONFIG_STM32_STM32F30XX)
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/* Set the end of system SRAM */
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# define SRAM1_END CONFIG_RAM_END
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/* Set the range of CCM SRAM as well (although we may not use it) */
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# define SRAM2_START 0x10000000
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# define SRAM2_END 0x10002000
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/* There is no FSMC */
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# undef CONFIG_STM32_FSMC_SRAM
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/* There are 2 possible SRAM configurations:
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*
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* Configuration 1. System SRAM (only)
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* CONFIG_MM_REGIONS == 1
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* CONFIG_STM32_CCMEXCLUDE defined
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* Configuration 2. System SRAM and CCM SRAM
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* CONFIG_MM_REGIONS == 2
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* CONFIG_STM32_CCMEXCLUDE NOT defined
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*/
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# if CONFIG_MM_REGIONS < 2
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/* Only one memory region. Force Configuration 1 */
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# ifndef CONFIG_STM32_CCMEXCLUDE
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# if CONFIG_STM32_HAVE_CCM
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# warning "CCM SRAM excluded from the heap"
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# endif
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# define CONFIG_STM32_CCMEXCLUDE 1
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# endif
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/* CONFIG_MM_REGIONS may be 2 if CCM SRAM is included in the head */
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# elif CONFIG_MM_REGIONS >= 2
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# if CONFIG_MM_REGIONS > 2
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# error "No more than two memory regions can be supported (CONFIG_MM_REGIONS)"
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# undef CONFIG_MM_REGIONS
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# define CONFIG_MM_REGIONS 2
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# endif
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/* Two memory regions is okay if CCM SRAM is not disabled. */
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# ifdef CONFIG_STM32_CCMEXCLUDE
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/* Configuration 1: CONFIG_MM_REGIONS should have been 2 */
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# error "CONFIG_MM_REGIONS >= 2 but but CCM SRAM is excluded (CONFIG_STM32_CCMEXCLUDE)"
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# undef CONFIG_MM_REGIONS
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# define CONFIG_MM_REGIONS 1
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# else
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/* Configuration 2: DMA should be disabled */
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# ifdef CONFIG_ARCH_DMA
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# warning "CCM SRAM is included in the heap AND DMA is enabled"
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# endif
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# endif
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# endif
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/* All members of the STM32F37xxx families have 16-32 Kib ram in a single
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* bank. No external RAM is supported (the F3 family has no FSMC).
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*/
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#elif defined(CONFIG_STM32_STM32F37XX)
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/* Set the end of system SRAM */
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# define SRAM1_END CONFIG_RAM_END
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/* There is no FSMC */
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# undef CONFIG_STM32_FSMC_SRAM
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/* The STM32 F37xx has no CCM SRAM */
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# undef CONFIG_STM32_CCMEXCLUDE
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# define CONFIG_STM32_CCMEXCLUDE 1
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/* Only one memory region can be support (internal SRAM) */
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# if CONFIG_MM_REGIONS > 1
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# error "CONFIG_MM_REGIONS > 1. The STM32L15X has only one memory region."
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# endif
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/* Most members of both the STM32F20xxx and STM32F40xxx families have 128Kib
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* in two banks:
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*
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* 1) 112KiB of System SRAM beginning at address 0x2000:0000
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* 2) 16KiB of System SRAM beginning at address 0x2001:c000
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*
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* The STM32F401 family is an exception and has only 96Kib total on one bank:
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*
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* 3) 96KiB of System SRAM beginning at address 0x2000:0000
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*
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* Members of the STM32F40xxx family have an additional 64Kib of CCM RAM
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* for a total of 192KB.
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*
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* 4) 64Kib of CCM SRAM beginning at address 0x1000:0000
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*
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* The STM32F427/437/429/439 parts have another 64KiB of System SRAM for a total
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* of 256KiB.
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*
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* 5) 64Kib of System SRAM beginning at address 0x2002:0000
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*
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* As determined by the linker script, g_heapbase lies in the 112KiB memory
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* region and that extends to 0x2001:0000. But the first and second memory
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* regions are contiguous and treated as one in this logic that extends to
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* 0x2002:0000 (or 0x2003:0000 for the F427/F437/F429/F439).
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*
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* As a complication, CCM SRAM cannot be used for DMA. So, if STM32 DMA is enabled,
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* CCM SRAM should probably be excluded from the heap or the application must take
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* extra care to ensure that DMA buffers are not allocated in CCM SRAM.
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*
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* In addition, external FSMC SRAM may be available.
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*/
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#elif defined(CONFIG_STM32_STM32F20XX) || defined(CONFIG_STM32_STM32F40XX)
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/* The STM32 F2 and the STM32 F401/F411 have no CCM SRAM */
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# if defined(CONFIG_STM32_STM32F20XX) || defined(CONFIG_STM32_STM32F401) || \
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defined(CONFIG_STM32_STM32F411)
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# undef CONFIG_STM32_CCMEXCLUDE
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# define CONFIG_STM32_CCMEXCLUDE 1
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# endif
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/* Set the end of system SRAM */
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# if defined(CONFIG_STM32_STM32F401)
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# define SRAM1_END 0x20018000
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# elif defined(CONFIG_STM32_STM32F427) || defined(CONFIG_STM32_STM32F429)
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# define SRAM1_END 0x20030000
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# else
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# define SRAM1_END 0x20020000
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# endif
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/* Set the range of CCM SRAM as well (although we may not use it) */
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# define SRAM2_START 0x10000000
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# define SRAM2_END 0x10010000
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/* There are 4 possible SRAM configurations:
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*
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* Configuration 1. System SRAM (only)
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* CONFIG_MM_REGIONS == 1
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* CONFIG_STM32_FSMC_SRAM NOT defined
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* CONFIG_STM32_CCMEXCLUDE defined
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* Configuration 2. System SRAM and CCM SRAM
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* CONFIG_MM_REGIONS == 2
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* CONFIG_STM32_FSMC_SRAM NOT defined
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* CONFIG_STM32_CCMEXCLUDE NOT defined
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* Configuration 3. System SRAM and FSMC SRAM
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* CONFIG_MM_REGIONS == 2
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* CONFIG_STM32_FSMC_SRAM defined
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* CONFIG_STM32_CCMEXCLUDE defined
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* Configuration 4. System SRAM, CCM SRAM, and FSMC SRAM
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* CONFIG_MM_REGIONS == 3
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* CONFIG_STM32_FSMC_SRAM defined
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* CONFIG_STM32_CCMEXCLUDE NOT defined
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*
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* Let's make sure that all definitions are consistent before doing
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* anything else
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*/
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# if defined(CONFIG_STM32_FSMC_SRAM)
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/* Configuration 3 or 4. External SRAM is available. CONFIG_MM_REGIONS
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* should be at least 2.
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*/
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# if CONFIG_MM_REGIONS < 2
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/* Only one memory region. Force Configuration 1 */
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# warning "FSMC SRAM (and CCM SRAM) excluded from the heap"
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# undef CONFIG_STM32_FSMC_SRAM
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# undef CONFIG_STM32_CCMEXCLUDE
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# define CONFIG_STM32_CCMEXCLUDE 1
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/* CONFIG_MM_REGIONS may be 3 if CCM SRAM is included in the head */
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# elif CONFIG_MM_REGIONS > 2
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/* More than two memory regions. This is okay if CCM SRAM is not
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* disabled.
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*/
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# if defined(CONFIG_STM32_CCMEXCLUDE)
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/* Configuration 3: CONFIG_MM_REGIONS should have been 2 */
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# error "CONFIG_MM_REGIONS > 2 but I don't know what some of the region(s) are"
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# undef CONFIG_MM_REGIONS
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# define CONFIG_MM_REGIONS 2
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# else
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/* Configuration 4: DMA should be disabled and CONFIG_MM_REGIONS
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* should be 3.
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*/
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# ifdef CONFIG_ARCH_DMA
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# warning "CCM SRAM is included in the heap AND DMA is enabled"
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# endif
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# if CONFIG_MM_REGIONS != 3
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# error "CONFIG_MM_REGIONS > 3 but I don't know what some of the region(s) are"
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# undef CONFIG_MM_REGIONS
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# define CONFIG_MM_REGIONS 3
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# endif
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# endif
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/* CONFIG_MM_REGIONS is exactly 2. We cannot support both CCM SRAM and
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* FSMC SRAM.
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*/
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# elif !defined(CONFIG_STM32_CCMEXCLUDE)
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# error "CONFIG_MM_REGIONS == 2, cannot support both CCM SRAM and FSMC SRAM"
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# undef CONFIG_STM32_CCMEXCLUDE
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# define CONFIG_STM32_CCMEXCLUDE 1
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# endif
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# elif !defined(CONFIG_STM32_CCMEXCLUDE)
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/* Configuration 2: FSMC SRAM is not used, but CCM SRAM is requested. DMA
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* should be disabled and CONFIG_MM_REGIONS should be 2.
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*/
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# ifdef CONFIG_ARCH_DMA
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# warning "CCM SRAM is included in the heap AND DMA is enabled"
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# endif
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# if CONFIG_MM_REGIONS < 2
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# if CONFIG_STM32_HAVE_CCM
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# error "CCM SRAM excluded from the heap because CONFIG_MM_REGIONS < 2"
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# endif
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# undef CONFIG_STM32_CCMEXCLUDE
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# define CONFIG_STM32_CCMEXCLUDE 1
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# elif CONFIG_MM_REGIONS > 2
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# error "CONFIG_MM_REGIONS > 2 but I don't know what some of the region(s) are"
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# undef CONFIG_MM_REGIONS
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# define CONFIG_MM_REGIONS 2
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# endif
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# endif
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#else
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# error "Unsupported STM32 chip"
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#endif
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/* If FSMC SRAM is going to be used as heap, then verify that the starting
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* address and size of the external SRAM region has been provided in the
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* configuration (as CONFIG_HEAP2_BASE and CONFIG_HEAP2_SIZE).
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*/
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#ifdef CONFIG_STM32_FSMC_SRAM
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# if !defined(CONFIG_HEAP2_BASE) || !defined(CONFIG_HEAP2_SIZE)
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# error "CONFIG_HEAP2_BASE and CONFIG_HEAP2_SIZE must be provided"
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# undef CONFIG_STM32_FSMC_SRAM
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# endif
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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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* Name: up_heap_color
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*
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* Description:
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* Set heap memory to a known, non-zero state to checking heap usage.
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*
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****************************************************************************/
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#ifdef CONFIG_HEAP_COLORATION
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static inline void up_heap_color(FAR void *start, size_t size)
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{
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memset(start, HEAP_COLOR, size);
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}
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#else
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# define up_heap_color(start,size)
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#endif
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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_BUILD_PROTECTED=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_BUILD_PROTECTED) && 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 = SRAM1_END - ubase;
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int log2;
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DEBUGASSERT(ubase < (uintptr_t)SRAM1_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 SRAM1_END
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* is aligned to the MPU requirement.
|
|
*/
|
|
|
|
log2 = (int)mpu_log2regionfloor(usize);
|
|
DEBUGASSERT((SRAM1_END & ((1 << log2) - 1)) == 0);
|
|
|
|
usize = (1 << log2);
|
|
ubase = SRAM1_END - usize;
|
|
|
|
/* Return the user-space heap settings */
|
|
|
|
board_autoled_on(LED_HEAPALLOCATE);
|
|
*heap_start = (FAR void *)ubase;
|
|
*heap_size = usize;
|
|
|
|
/* Colorize the heap for debug */
|
|
|
|
up_heap_color((FAR void *)ubase, usize);
|
|
|
|
/* Allow user-mode access to the user heap memory */
|
|
|
|
stm32_mpu_uheap((uintptr_t)ubase, usize);
|
|
#else
|
|
|
|
/* Return the heap settings */
|
|
|
|
board_autoled_on(LED_HEAPALLOCATE);
|
|
*heap_start = (FAR void *)g_idle_topstack;
|
|
*heap_size = SRAM1_END - g_idle_topstack;
|
|
|
|
/* Colorize the heap for debug */
|
|
|
|
up_heap_color(*heap_start, *heap_size);
|
|
#endif
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: up_allocate_kheap
|
|
*
|
|
* Description:
|
|
* For the kernel build (CONFIG_BUILD_PROTECTED=y) with both kernel- and
|
|
* user-space heaps (CONFIG_MM_KERNEL_HEAP=y), this function allocates
|
|
* (and protects) the kernel-space heap.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if defined(CONFIG_BUILD_PROTECTED) && defined(CONFIG_MM_KERNEL_HEAP)
|
|
void up_allocate_kheap(FAR void **heap_start, size_t *heap_size)
|
|
{
|
|
/* Get the unaligned size and position of the user-space heap.
|
|
* This heap begins after the user-space .bss section at an offset
|
|
* of CONFIG_MM_KERNEL_HEAPSIZE (subject to alignment).
|
|
*/
|
|
|
|
uintptr_t ubase = (uintptr_t)USERSPACE->us_bssend + CONFIG_MM_KERNEL_HEAPSIZE;
|
|
size_t usize = SRAM1_END - ubase;
|
|
int log2;
|
|
|
|
DEBUGASSERT(ubase < (uintptr_t)SRAM1_END);
|
|
|
|
/* Adjust that size to account for MPU alignment requirements.
|
|
* NOTE that there is an implicit assumption that the SRAM1_END
|
|
* is aligned to the MPU requirement.
|
|
*/
|
|
|
|
log2 = (int)mpu_log2regionfloor(usize);
|
|
DEBUGASSERT((SRAM1_END & ((1 << log2) - 1)) == 0);
|
|
|
|
usize = (1 << log2);
|
|
ubase = SRAM1_END - usize;
|
|
|
|
/* Return the kernel heap settings (i.e., the part of the heap region
|
|
* that was not dedicated to the user heap).
|
|
*/
|
|
|
|
*heap_start = (FAR void *)USERSPACE->us_bssend;
|
|
*heap_size = ubase - (uintptr_t)USERSPACE->us_bssend;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* 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)
|
|
{
|
|
#ifndef CONFIG_STM32_CCMEXCLUDE
|
|
#if defined(CONFIG_BUILD_PROTECTED) && defined(CONFIG_MM_KERNEL_HEAP)
|
|
|
|
/* Allow user-mode access to the STM32F20xxx/STM32F40xxx CCM SRAM heap */
|
|
|
|
stm32_mpu_uheap((uintptr_t)SRAM2_START, SRAM2_END-SRAM2_START);
|
|
|
|
#endif
|
|
|
|
/* Colorize the heap for debug */
|
|
|
|
up_heap_color((FAR void *)SRAM2_START, SRAM2_END-SRAM2_START);
|
|
|
|
/* Add the STM32F20xxx/STM32F40xxx CCM SRAM user heap region. */
|
|
|
|
kumm_addregion((FAR void *)SRAM2_START, SRAM2_END-SRAM2_START);
|
|
#endif
|
|
|
|
#ifdef CONFIG_STM32_FSMC_SRAM
|
|
#if defined(CONFIG_BUILD_PROTECTED) && defined(CONFIG_MM_KERNEL_HEAP)
|
|
|
|
/* Allow user-mode access to the FSMC SRAM user heap memory */
|
|
|
|
stm32_mpu_uheap((uintptr_t)CONFIG_HEAP2_BASE, CONFIG_HEAP2_SIZE);
|
|
|
|
#endif
|
|
|
|
/* Colorize the heap for debug */
|
|
|
|
up_heap_color((FAR void *)CONFIG_HEAP2_BASE, CONFIG_HEAP2_SIZE);
|
|
|
|
/* Add the external FSMC SRAM user heap region. */
|
|
|
|
kumm_addregion((FAR void *)CONFIG_HEAP2_BASE, CONFIG_HEAP2_SIZE);
|
|
#endif
|
|
}
|
|
#endif
|