param.h revision 1.18
1/* $NetBSD: param.h,v 1.18 2013/04/22 07:53:29 matt Exp $ */ 2 3/* 4 * Copyright (c) 1994,1995 Mark Brinicombe. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the RiscBSD team. 18 * 4. The name "RiscBSD" nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#ifndef _ARM_PARAM_H_ 36#define _ARM_PARAM_H_ 37 38/* 39 * Machine dependent constants for all ARM processors 40 */ 41 42/* 43 * For KERNEL code: 44 * MACHINE must be defined by the individual port. This is so that 45 * uname returns the correct thing, etc. 46 * 47 * MACHINE_ARCH may be defined by individual ports as a temporary 48 * measure while we're finishing the conversion to ELF. 49 * 50 * For non-KERNEL code: 51 * If ELF, MACHINE and MACHINE_ARCH are forced to "arm/armeb". 52 */ 53 54#if defined(_KERNEL) 55# ifndef MACHINE_ARCH /* XXX For now */ 56# ifndef __ARMEB__ 57# ifdef __ARM_EABI__ 58# define _MACHINE_ARCH earm 59# define MACHINE_ARCH "earm" 60# else 61# define _MACHINE_ARCH arm 62# define MACHINE_ARCH "arm" 63# endif 64# else 65# ifdef __ARM_EABI__ 66# define _MACHINE_ARCH earmeb 67# define MACHINE_ARCH "earmeb" 68# else 69# define _MACHINE_ARCH armeb 70# define MACHINE_ARCH "armeb" 71# endif 72# endif /* __ARMEB__ */ 73# endif /* MACHINE_ARCH */ 74#else 75# undef _MACHINE 76# undef MACHINE 77# undef _MACHINE_ARCH 78# undef MACHINE_ARCH 79# define _MACHINE arm 80# define MACHINE "arm" 81# ifndef __ARMEB__ 82# ifdef __ARM_EABI__ 83# define _MACHINE_ARCH earm 84# define MACHINE_ARCH "earm" 85# else 86# define _MACHINE_ARCH arm 87# define MACHINE_ARCH "arm" 88# endif 89# else 90# ifdef __ARM_EABI__ 91# define _MACHINE_ARCH earmeb 92# define MACHINE_ARCH "earmeb" 93# else 94# define _MACHINE_ARCH armeb 95# define MACHINE_ARCH "armeb" 96# endif 97# endif /* __ARMEB__ */ 98#endif /* !_KERNEL */ 99 100#define MID_MACHINE MID_ARM6 101 102/* ARM-specific macro to align a stack pointer (downwards). */ 103#define STACK_ALIGNBYTES (8 - 1) 104#ifdef __ARM_EABI__ 105#define ALIGNBYTES32 3 106#else 107#define ALIGNBYTES32 7 108#endif 109 110#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 111#define DEV_BSIZE (1 << DEV_BSHIFT) 112#define BLKDEV_IOSIZE 2048 113 114#ifndef MAXPHYS 115#define MAXPHYS 65536 /* max I/O transfer size */ 116#endif 117 118/* 119 * Constants related to network buffer management. 120 * MCLBYTES must be no larger than NBPG (the software page size), and, 121 * on machines that exchange pages of input or output buffers with mbuf 122 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 123 * of the hardware page size. 124 */ 125#define MSIZE 256 /* size of an mbuf */ 126 127#ifndef MCLSHIFT 128#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 129 /* 2K cluster can hold Ether frame */ 130#endif /* MCLSHIFT */ 131 132#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 133 134#ifndef NMBCLUSTERS_MAX 135#define NMBCLUSTERS_MAX (0x2000000 / MCLBYTES) /* Limit to 64MB for clusters */ 136#endif 137 138/* 139 * Compatibility /dev/zero mapping. 140 */ 141#ifdef _KERNEL 142#ifdef COMPAT_16 143#define COMPAT_ZERODEV(x) (x == makedev(0, _DEV_ZERO_oARM)) 144#endif 145#endif /* _KERNEL */ 146 147#endif /* _ARM_PARAM_H_ */ 148