06622912a6
device drivers. Recent versions of u-boot run with the MMU enabled, and require DMA-based I/O to be aligned to cache line boundaries. These changes are based on a patch originally submitted by Juergen Weiss, but I reworked them and thus any problems are purely my fault. Submitted by: "Juergen Weiss" <weiss@uni-mainz.de> Reviewed by: imp, nwhitehorn, jhb
79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/*
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* This module derived from code donated to the FreeBSD Project by
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* Matthew Dillon <dillon@backplane.com>
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*
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* Copyright (c) 1998 The FreeBSD 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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* 1. 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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* 2. 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT 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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* $FreeBSD$
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*/
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/*
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* DEFS.H
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*/
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#define USEGUARD /* use stard/end guard bytes */
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#define USEENDGUARD
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#define DMALLOCDEBUG /* add debugging code to gather stats */
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#define ZALLOCDEBUG
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#include <sys/stdint.h>
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#include "stand.h"
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#include "zalloc_mem.h"
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#define Library extern
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/*
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* block extension for sbrk()
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*/
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#define BLKEXTEND (4 * 1024)
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#define BLKEXTENDMASK (BLKEXTEND - 1)
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/*
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* Required malloc alignment.
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*
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* Embedded platforms using the u-boot API drivers require that all I/O buffers
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* be on a cache line sized boundary. The worst case size for that is 64 bytes.
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* For other platforms, 16 bytes works fine. The alignment also must be at
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* least sizeof(struct MemNode); this is asserted in zalloc.c.
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*/
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#if defined(__arm__) || defined(__mips__) || defined(__powerpc__)
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#define MALLOCALIGN 64
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#else
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#define MALLOCALIGN 16
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#endif
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#define MALLOCALIGN_MASK (MALLOCALIGN - 1)
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typedef struct Guard {
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size_t ga_Bytes;
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size_t ga_Magic; /* must be at least 32 bits */
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} Guard;
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#define GAMAGIC 0x55FF44FD
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#define GAFREE 0x5F54F4DF
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#include "zalloc_protos.h"
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