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/************************************************************************
* mm/umm_heap/umm_initialize.c
*
* Copyright (C) 2013-2014 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 <assert.h>
#include <nuttx/mm.h>
#if !defined(CONFIG_BUILD_PROTECTED) || !defined(__KERNEL__)
/************************************************************************
* Pre-processor definition
************************************************************************/
/************************************************************************
* Private Types
************************************************************************/
/************************************************************************
* Public Data
************************************************************************/
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
/* In the kernel build, there a multiple user heaps; one for each task
* group. In this build configuration, the user heap structure lies
* in a reserved region at the beginning of the .bss/.data address
* space (CONFIG_ARCH_DATA_VBASE). The size of that region is given by
* ARCH_DATA_RESERVE_SIZE
*/
# include <nuttx/addrenv.h>
# define USR_HEAP (&ARCH_DATA_RESERVE->ar_usrheap)
#else
/* Otherwise, the user heap data structures are in common .bss */
struct mm_heap_s g_mmheap;
#define USR_HEAP &g_mmheap
#endif
/************************************************************************
* Private Functions
************************************************************************/
/************************************************************************
* Public Functions
************************************************************************/
/************************************************************************
* Name: umm_initialize
*
* Description:
* This is a simple wrapper for the mm_initialize() function. This
* function will initialize the user heap.
*
* CONFIG_BUILD_FLAT:
* There is only kernel mode "blob" containing both containing both
* kernel and application code. There is only one heap that use is
* used by both the kernel and application logic.
*
* In this configuration, this function is called early in os_start()
* to initialize the common heap.
*
* CONFIG_BUILD_PROTECTED
* In this configuration, there are two "blobs", one containing
* protected kernel logic and one containing unprotected application
* logic. Depending upon the setting of CONFIG_MM_KERNEL_HEAP there
* may be only a signal shared heap, much as with CONFIG_BUILD_FLAT.
* Or there may be separate protected/kernel and unprotected/user
* heaps.
*
* In either case, this function is still called early in os_start()
* to initialize the user heap.
*
* CONFIG_BUILD_KERNEL
* In this configuration there are multiple user heaps, one for each
* user process. Furthermore, each heap is initially empty; memory
* is added to each heap dynamically via sbrk(). The heap data
* structure was set to zero when the address environment was created.
* Otherwise, the heap is uninitialized.
*
* This function is not called at all. Rather, this function is called
* when each user process is created before the first allocation is made.
*
* Parameters:
* heap_start - Address of the beginning of the (initial) memory region
* heap_size - The size (in bytes) if the (initial) memory region.
*
* Return Value:
* None
*
************************************************************************/
void umm_initialize(FAR void *heap_start, size_t heap_size)
{
mm_initialize(USR_HEAP, heap_start, heap_size);
}
#endif /* !CONFIG_BUILD_PROTECTED || !__KERNEL__ */
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