135 lines
4.8 KiB
C
135 lines
4.8 KiB
C
/****************************************************************************
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* mm/mm_gran/mm_gran.h
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*
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* Copyright (C) 2012, 2017 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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#ifndef __MM_MM_GRAN_MM_GRAN_H
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#define __MM_MM_GRAN_MM_GRAN_H
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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 <stdint.h>
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#include <arch/types.h>
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#include <nuttx/mm/gran.h>
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#include <nuttx/semaphore.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Sizes of things */
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#define SIZEOF_GAT(n) \
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((n + 31) >> 5)
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#define SIZEOF_GRAN_S(n) \
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(sizeof(struct gran_s) + sizeof(uint32_t) * (SIZEOF_GAT(n) - 1))
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/* Debug */
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#ifdef CONFIG_DEBUG_GRAM
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# define granerr _err
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# define granwarn _warn
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# define graninfo _info
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#else
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# define granerr merr
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# define granwarn mwarn
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# define graninfo minfo
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#endif
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* This structure represents the state of one granule allocation */
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struct gran_s
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{
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uint8_t log2gran; /* Log base 2 of the size of one granule */
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uint16_t ngranules; /* The total number of (aligned) granules in the heap */
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#ifdef CONFIG_GRAN_INTR
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irqstate_t irqstate; /* For exclusive access to the GAT */
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#else
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sem_t exclsem; /* For exclusive access to the GAT */
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#endif
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uintptr_t heapstart; /* The aligned start of the granule heap */
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uint32_t gat[1]; /* Start of the granule allocation table */
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: gran_enter_critical and gran_leave_critical
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*
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* Description:
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* Critical section management for the granule allocator.
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*
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* Input Parameters:
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* priv - Pointer to the gran state
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*
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* Returned Value:
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* gran_enter_critical() may return any error reported by
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* nxsem_wait_uninterruptible()
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*
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****************************************************************************/
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int gran_enter_critical(FAR struct gran_s *priv);
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void gran_leave_critical(FAR struct gran_s *priv);
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/****************************************************************************
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* Name: gran_mark_allocated
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*
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* Description:
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* Mark a range of granules as allocated.
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*
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* Input Parameters:
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* priv - The granule heap state structure.
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* alloc - The address of the allocation.
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* ngranules - The number of granules allocated
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void gran_mark_allocated(FAR struct gran_s *priv, uintptr_t alloc,
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unsigned int ngranules);
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#endif /* __MM_MM_GRAN_MM_GRAN_H */
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