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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1894 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Jakub Jermar |
| 1894 | jermar | 3 | * All rights reserved. |
| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #include <balloc.h> |
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| 30 | #include <types.h> |
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| 31 | #include <align.h> |
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| 32 | |||
| 33 | static ballocs_t *ballocs; |
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| 34 | |||
| 35 | void balloc_init(ballocs_t *b, uintptr_t base) |
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| 36 | { |
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| 37 | ballocs = b; |
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| 38 | ballocs->base = base; |
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| 39 | ballocs->size = 0; |
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| 40 | } |
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| 41 | |||
| 42 | void *balloc(size_t size, size_t alignment) |
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| 43 | { |
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| 44 | uintptr_t addr; |
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| 45 | |||
| 46 | /* Enforce minimal alignment. */ |
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| 47 | alignment = ALIGN_UP(alignment, 4); |
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| 48 | |||
| 49 | addr = ballocs->base + ALIGN_UP(ballocs->size, alignment); |
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| 2307 | hudecek | 50 | |
| 51 | if (ALIGN_UP(ballocs->size, alignment) + size > BALLOC_MAX_SIZE) |
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| 52 | return NULL; |
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| 53 | |||
| 1894 | jermar | 54 | ballocs->size = ALIGN_UP(ballocs->size, alignment) + size; |
| 55 | |||
| 56 | return (void *) addr; |
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| 57 | } |