101 lines
4.2 KiB
C
101 lines
4.2 KiB
C
/****************************************************************************
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* mm/umm_heap/umm_initialize.c
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*
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* Copyright (C) 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 <assert.h>
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#include <nuttx/mm/mm.h>
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#include "umm_heap/umm_heap.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: umm_initialize
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*
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* Description:
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* This is a simple wrapper for the mm_initialize() function. This
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* function will initialize the user heap.
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*
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* CONFIG_BUILD_FLAT:
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* There is only kernel mode "blob" containing both containing both
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* kernel and application code. There is only one heap that use is
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* used by both the kernel and application logic.
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*
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* In this configuration, this function is called early in os_start()
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* to initialize the common heap.
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*
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* CONFIG_BUILD_PROTECTED
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* In this configuration, there are two "blobs", one containing
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* protected kernel logic and one containing unprotected application
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* logic. Depending upon the setting of CONFIG_MM_KERNEL_HEAP there
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* may be only a signal shared heap, much as with CONFIG_BUILD_FLAT.
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* Or there may be separate protected/kernel and unprotected/user
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* heaps.
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*
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* In either case, this function is still called early in os_start()
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* to initialize the user heap.
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*
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* CONFIG_BUILD_KERNEL
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* In this configuration there are multiple user heaps, one for each
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* user process. Furthermore, each heap is initially empty; memory
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* is added to each heap dynamically via sbrk(). The heap data
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* structure was set to zero when the address environment was created.
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* Otherwise, the heap is uninitialized.
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*
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* This function is not called at all. Rather, this function is called
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* when each user process is created before the first allocation is made.
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*
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* Parameters:
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* heap_start - Address of the beginning of the (initial) memory region
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* heap_size - The size (in bytes) if the (initial) memory region.
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*
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* Return Value:
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* None
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*
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****************************************************************************/
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void umm_initialize(FAR void *heap_start, size_t heap_size)
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{
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mm_initialize(USR_HEAP, heap_start, heap_size);
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}
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