70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/*
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* Copyright (c) 2010, Stefan Lankes, RWTH Aachen University
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* All rights reserved.
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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 are met:
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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @author Steffen Vogel
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* @file include/memory.h
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* @brief Memory related functions
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*
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* This file contains platform independent memory functions
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*/
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#ifndef __MEMORY_H__
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#define __MEMORY_H__
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/** @brief Initialize the memory subsystem */
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int memory_init(void);
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/** @brief Request physical page frames */
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size_t get_pages(size_t npages);
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/** @brief Get a single page
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*
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* Convenience function: uses get_pages(1);
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*/
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static inline size_t get_page(void) { return get_pages(1); }
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/** @brief release physical page frames */
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int put_pages(size_t phyaddr, size_t npages);
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/** @brief Put a single page
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*
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* Convenience function: uses put_pages(1);
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*/
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static inline int put_page(size_t phyaddr) { return put_pages(phyaddr, 1); }
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/** @brief Copy a physical page frame
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*
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* @param psrc physical address of source page frame
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* @param pdest physical address of source page frame
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* @return
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* - 0 on success
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* - -1 on failure
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*/
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int copy_page(size_t pdest, size_t psrc);
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#endif
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