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60 lines
2.3 KiB
C
60 lines
2.3 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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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
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* 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
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* the documentation and/or other materials provided with the
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* distribution.
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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 LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __LINKER_BA_H
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#define __LINKER_BA_H
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struct ba_bits {
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unsigned allocated:1; /* 1 if allocated, 0 if free */
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unsigned order:7; /* size of the region in ba space */
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};
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struct ba {
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/* start address of the ba space */
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unsigned long base;
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/* total size of the ba space */
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unsigned long size;
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/* the smaller allocation that can be made */
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unsigned long min_alloc;
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/* the order of the largest allocation that can be made */
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unsigned long max_order;
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/* number of entries in the ba space */
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int num_entries;
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/* the bitmap for the region indicating which entries are allocated
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* and which are free */
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struct ba_bits *bitmap;
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};
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extern void ba_init(struct ba *ba);
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extern int ba_allocate(struct ba *ba, unsigned long len);
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extern int ba_free(struct ba *ba, int index);
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extern unsigned long ba_start_addr(struct ba *ba, int index);
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extern unsigned long ba_len(struct ba *ba, int index);
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#endif
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