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Diffstat (limited to 'nuttx/arch/arm/src/sama5/sam_allocateheap.c')
| -rw-r--r-- | nuttx/arch/arm/src/sama5/sam_allocateheap.c | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/sama5/sam_allocateheap.c b/nuttx/arch/arm/src/sama5/sam_allocateheap.c new file mode 100644 index 000000000..0828f6d6a --- /dev/null +++ b/nuttx/arch/arm/src/sama5/sam_allocateheap.c @@ -0,0 +1,368 @@ +/**************************************************************************** + * arch/arm/src/sama5/sam_allocateheap.c + * + * Copyright (C) 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 <stdint.h> +#include <assert.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <nuttx/userspace.h> + +#include <arch/board/board.h> + +#include "up_arch.h" +#include "up_internal.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ +/* We cannot use the memory for heap if it is not enabled. Or, if it is + * enabled, but does not hold SDRAM, SRAM, or PSRAM. + * + * We cannot add the region if it is if we are executing from it! In that + * case, the remainder of the memory will automatically be added to the heap + * based on g_idle_topstack and CONFIG_DRAM_END + */ + +#if defined(CONFIG_SAMA5_BOOT_ISRAM) +# undef CONFIG_SAMA5_ISRAM_HEAP +#endif + +#if !defined(CONFIG_SAMA5_DDRCS) || defined(CONFIG_SAMA5_BOOT_SDRAM) +# undef CONFIG_SAMA5_DDRCS_HEAP +#endif + +#if !defined(CONFIG_SAMA5_EBICS0) || defined(CONFIG_SAMA5_BOOT_CS0SRAM) || \ + (!defined(CONFIG_SAMA5_EBICS0_SRAM) && !defined(CONFIG_SAMA5_EBICS0_PSRAM)) + +# undef SAMA5_EBICS0_HEAP +#endif + +#if !defined(CONFIG_SAMA5_EBICS1) || defined(CONFIG_SAMA5_BOOT_CS1SRAM) || \ + (!defined(CONFIG_SAMA5_EBICS1_SRAM) && !defined(CONFIG_SAMA5_EBICS1_PSRAM)) + +# undef SAMA5_EBICS1_HEAP +#endif + +#if !defined(CONFIG_SAMA5_EBICS2) || defined(CONFIG_SAMA5_BOOT_CS2SRAM) || \ + (!defined(CONFIG_SAMA5_EBICS2_SRAM) && !defined(CONFIG_SAMA5_EBICS2_PSRAM)) + +# undef SAMA5_EBICS2_HEAP +#endif + +#if !defined(SAMA5_CONFIG_EBICS3) || defined(CONFIG_SAMA5_BOOT_CS3SRAM) || \ + (!defined(SAMA5_CONFIG_EBICS3_SRAM) && !defined(CONFIG_SAMA5_EBICS3_PSRAM)) + +# undef SAMA5_EBICS3_HEAP +#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_NUTTX_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 by an analogous up_allocate_kheap(). A custom version of this + * file is needed if memory protection of the kernel heap is required. + * + * The following memory map is assumed for the flat build: + * + * .data region. Size determined at link time. + * .bss region Size determined at link time. + * IDLE thread stack. Size determined by CONFIG_IDLETHREAD_STACKSIZE. + * Heap. Extends to the end of SRAM. + * + * The following memory map is assumed for the kernel build: + * + * Kernel .data region. Size determined at link time. + * Kernel .bss region Size determined at link time. + * Kernel IDLE thread stack. Size determined by CONFIG_IDLETHREAD_STACKSIZE. + * Padding for alignment + * User .data region. Size determined at link time. + * User .bss region Size determined at link time. + * Kernel heap. Size determined by CONFIG_MM_KERNEL_HEAPSIZE. + * User heap. Extends to the end of SRAM. + * + ****************************************************************************/ + +void up_allocate_heap(FAR void **heap_start, size_t *heap_size) +{ +#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP) + /* 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 = CONFIG_DRAM_END - ubase; + int log2; + + DEBUGASSERT(ubase < (uintptr_t)CONFIG_DRAM_END); + + /* Return the user-space heap settings */ + + up_ledon(LED_HEAPALLOCATE); + *heap_start = (FAR void*)ubase; + *heap_size = usize; +#else + + /* Return the heap settings */ + + up_ledon(LED_HEAPALLOCATE); + *heap_start = (FAR void*)g_idle_topstack; + *heap_size = CONFIG_DRAM_END - g_idle_topstack; +#endif +} + +/**************************************************************************** + * Name: up_allocate_kheap + * + * Description: + * For the kernel build (CONFIG_NUTTX_KERNEL=y) with both kernel- and + * user-space heaps (CONFIG_MM_KERNEL_HEAP=y), this function allocates + * the kernel-space heap. A custom version of this function is need if + * memory protection of the kernel heap is required. + * + ****************************************************************************/ + +#if defined(CONFIG_NUTTX_KERNEL) && 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 = CONFIG_DRAM_END - ubase; + int log2; + + DEBUGASSERT(ubase < (uintptr_t)CONFIG_DRAM_END); + + /* 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) +{ + int nregions = CONFIG_MM_REGIONS; + size_t size; + +#ifdef CONFIG_SAMA5_ISRAM_HEAP +#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP) + + /* Allow user-mode access to the ISRAM heap */ + + size = SAM_ISRAM0_SIZE + SAM_ISRAM1_SIZE; + sam_uheap((uintptr_t)SAM_ISRAM0_VADDR, size); + +#endif + + /* Add the ISRAM user heap region. */ + + kumm_addregion((FAR void*)SAM_ISRAM0_VADDR, size); + + nregions--; +#endif + +#ifdef CONFIG_SAMA5_DDRCS_HEAP + if (nregions > 0) + { +#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP) + /* Allow user-mode access to the ISRAM heap */ + + size = CONFIG_SAMA5_DDRCS_SIZE; + sam_uheap((uintptr_t)SAM_DDRCS_VSECTION, size); +#endif + + /* Add the ISRAM user heap region. */ + + kumm_addregion((FAR void*)SAM_DDRCS_VSECTION, size); + + nregions--; + } + else + { + lldbg("ERROR: SDRAM memory not added to heap. CONFIG_MM_NREGIONS=%d\n", + CONFIG_MM_REGIONS); + lldbg(" Increase the size of CONFIG_MM_NREGIONS\n"); + } +#endif + +#ifdef SAMA5_EBICS0_HEAP + if (nregions > 0) + { +#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP) + /* Allow user-mode access to the ISRAM heap */ + + size = CONFIG_SAMA5_EBICS0_SIZE; + sam_uheap((uintptr_t)SAM_EBICS0_VSECTION, size); +#endif + + /* Add the ISRAM user heap region. */ + + kumm_addregion((FAR void*)SAM_EBICS0_VSECTION, size); + + nregions--; + } + else + { + lldbg("ERROR: CS0 memory not added to heap. CONFIG_MM_NREGIONS=%d\n", + CONFIG_MM_REGIONS); + lldbg(" Increase the size of CONFIG_MM_NREGIONS\n"); + } +#endif + +#ifdef SAMA5_EBICS1_HEAP + if (nregions > 0) + { +#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP) + /* Allow user-mode access to the ISRAM heap */ + + size = CONFIG_SAMA5_EBICS1_SIZE; + sam_uheap((uintptr_t)SAM_EBICS1_VSECTION, size); +#endif + + /* Add the ISRAM user heap region. */ + + kumm_addregion((FAR void*)SAM_EBICS1_VSECTION, size); + + nregions--; + } + else + { + lldbg("ERROR: CS1 memory not added to heap. CONFIG_MM_NREGIONS=%d\n", + CONFIG_MM_REGIONS); + lldbg(" Increase the size of CONFIG_MM_NREGIONS\n"); + } +#endif + +#ifdef SAMA5_EBICS2_HEAP + if (nregions > 0) + { +#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP) + /* Allow user-mode access to the ISRAM heap */ + + size = CONFIG_SAMA5_EBICS2_SIZE; + sam_uheap((uintptr_t)SAM_EBICS2_VSECTION, size); +#endif + + /* Add the ISRAM user heap region. */ + + kumm_addregion((FAR void*)SAM_EBICS2_VSECTION, size); + + nregions--; + } + else + { + lldbg("ERROR: CS2 memory not added to heap. CONFIG_MM_NREGIONS=%d\n", + CONFIG_MM_REGIONS); + lldbg(" Increase the size of CONFIG_MM_NREGIONS\n"); + } +#endif + +#ifdef SAMA5_EBICS3_HEAP + if (nregions > 0) + { +#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP) + /* Allow user-mode access to the ISRAM heap */ + + size = CONFIG_SAMA5_EBICS3_SIZE; + sam_uheap((uintptr_t)SAM_EBICS3_VSECTION, size); +#endif + + /* Add the ISRAM user heap region. */ + + kumm_addregion((FAR void*)SAM_EBICS3_VSECTION, size); + + nregions--; + } + else + { + lldbg("ERROR: CS3 memory not added to heap. CONFIG_MM_NREGIONS=%d\n", + CONFIG_MM_REGIONS); + lldbg(" Increase the size of CONFIG_MM_NREGIONS\n"); + } +#endif + + /* Did we add all of the requestion regions */ + + if (nregions > 0) + { + lldbg("ERROR: Not all regions added to heap: %d added, but CONFIG_MM_NREGIONS=%d\n", + CONFIG_MM_REGIONS - nregions, CONFIG_MM_REGIONS); + lldbg(" Decrease the size of CONFIG_MM_NREGIONS\n"); + } +} +#endif |