1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef __LINKER_BA_H 30 #define __LINKER_BA_H 31 32 struct ba_bits { 33 unsigned allocated:1; /* 1 if allocated, 0 if free */ 34 unsigned order:7; /* size of the region in ba space */ 35 }; 36 37 struct ba { 38 /* start address of the ba space */ 39 unsigned long base; 40 /* total size of the ba space */ 41 unsigned long size; 42 /* the smaller allocation that can be made */ 43 unsigned long min_alloc; 44 /* the order of the largest allocation that can be made */ 45 unsigned long max_order; 46 /* number of entries in the ba space */ 47 int num_entries; 48 /* the bitmap for the region indicating which entries are allocated 49 * and which are free */ 50 struct ba_bits *bitmap; 51 }; 52 53 extern void ba_init(struct ba *ba); 54 extern int ba_allocate(struct ba *ba, unsigned long len); 55 extern int ba_free(struct ba *ba, int index); 56 extern unsigned long ba_start_addr(struct ba *ba, int index); 57 extern unsigned long ba_len(struct ba *ba, int index); 58 59 #endif 60
