forked from Imagelibrary/rtems
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/*
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* Copyright (c) 2006 Jakub Jermar
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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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*
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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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* - The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* 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
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Modifications are made to compile for RTEMS. Removes asm.h and replaces
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* the necessary defines in-line
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*
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*/
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#include <boot/balloc.h>
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#if 0
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#include <asm.h>
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#endif
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#include <boot/types.h>
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#include <boot/align.h>
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static ballocs_t *ballocs;
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static uintptr_t phys_base;
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void balloc_init(ballocs_t *ball, uintptr_t base, uintptr_t kernel_base)
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{
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ballocs = ball;
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phys_base = base;
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ballocs->base = kernel_base;
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ballocs->size = 0;
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}
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void *balloc(size_t size, size_t alignment)
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{
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/* Enforce minimal alignment. */
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alignment = ALIGN_UP(alignment, 4);
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uintptr_t addr = phys_base + ALIGN_UP(ballocs->size, alignment);
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if (ALIGN_UP(ballocs->size, alignment) + size > BALLOC_MAX_SIZE)
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return NULL;
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ballocs->size = ALIGN_UP(ballocs->size, alignment) + size;
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return (void *) addr;
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}
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void *balloc_rebase(void *ptr)
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{
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return (void *) ((uintptr_t) ptr - phys_base + ballocs->base);
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}
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