forked from xuos/xiuos
Wang_Weigen
99 lines
3.6 KiB
C
Executable File
99 lines
3.6 KiB
C
Executable File
/****************************************************************************
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* arch/risc-v/src/gap8/gap8_allocateheap.c
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*
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* Copyright (C) 2018 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/board.h>
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#include <arch/board/board.h>
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#include "riscv_arch.h"
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#include "riscv_internal.h"
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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_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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****************************************************************************/
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void up_allocate_heap(FAR void **heap_start, size_t *heap_size)
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{
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/* These values come from GAP8.ld */
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extern uint8_t *_heap_start;
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extern uint8_t *_heap_end;
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uint32_t hstart = (uint32_t)&_heap_start;
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uint32_t hend = (uint32_t)&_heap_end;
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*heap_start = &_heap_start;
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*heap_size = hend - hstart;
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}
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/****************************************************************************
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* Name: riscv_addregion
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*
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* Description:
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* RAM may be added in non-contiguous chunks. This routine adds all chunks
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* that may be used for heap.
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*
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****************************************************************************/
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#if CONFIG_MM_REGIONS > 1
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void riscv_addregion(void)
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{
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/* TODO: add L1 memorie */
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}
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#endif
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