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132 lines
4.6 KiB
132 lines
4.6 KiB
/**************************************************************************** |
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* mm/mm_gran.h |
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* |
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* Copyright (C) 2012 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_H |
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#define __MM_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 <semaphore.h> |
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#include <arch/types.h> |
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#include <nuttx/gran.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_CPP_HAVE_VARARGS |
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# ifdef CONFIG_DEBUG_GRAM |
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# define gramdbg(format, arg...) dbg(format, ##arg) |
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# define gramvdbg(format, arg...) vdbg(format, ##arg) |
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# else |
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# define gramdbg(format, arg...) mdbg(format, ##arg) |
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# define gramvdbg(format, arg...) mvdbg(format, ##arg) |
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# endif |
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#else |
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# ifdef CONFIG_DEBUG_GRAM |
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# define gramdbg dbg |
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# define gramvdbg vdbg |
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# else |
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# define gramdbg (void) |
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# define gramvdbg (void) |
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# endif |
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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 on granual 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 Data |
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****************************************************************************/ |
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/* State of the single GRAN allocator */ |
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#ifdef CONFIG_GRAN_SINGLE |
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extern FAR struct gran_s *g_graninfo; |
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#endif |
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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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* None |
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* |
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****************************************************************************/ |
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void 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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#endif /* __MM_MM_GRAN_H */
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