param.h revision 1.17
1/* $NetBSD: param.h,v 1.17 2012/08/03 08:11:40 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#define _MACHINE_ARCH arm 58#define MACHINE_ARCH "arm" 59#else 60#define _MACHINE_ARCH armeb 61#define MACHINE_ARCH "armeb" 62#endif /* __ARMEB__ */ 63#endif /* MACHINE_ARCH */ 64#else 65#undef _MACHINE 66#undef MACHINE 67#undef _MACHINE_ARCH 68#undef MACHINE_ARCH 69#define _MACHINE arm 70#define MACHINE "arm" 71#ifndef __ARMEB__ 72#define _MACHINE_ARCH arm 73#define MACHINE_ARCH "arm" 74#else 75#define _MACHINE_ARCH armeb 76#define MACHINE_ARCH "armeb" 77#endif /* __ARMEB__ */ 78#endif /* !_KERNEL */ 79 80#define MID_MACHINE MID_ARM6 81 82/* ARM-specific macro to align a stack pointer (downwards). */ 83#define STACK_ALIGNBYTES (8 - 1) 84#ifdef __ARM_EABI__ 85#define ALIGNBYTES32 3 86#else 87#define ALIGNBYTES32 7 88#endif 89 90#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 91#define DEV_BSIZE (1 << DEV_BSHIFT) 92#define BLKDEV_IOSIZE 2048 93 94#ifndef MAXPHYS 95#define MAXPHYS 65536 /* max I/O transfer size */ 96#endif 97 98/* 99 * Constants related to network buffer management. 100 * MCLBYTES must be no larger than NBPG (the software page size), and, 101 * on machines that exchange pages of input or output buffers with mbuf 102 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 103 * of the hardware page size. 104 */ 105#define MSIZE 256 /* size of an mbuf */ 106 107#ifndef MCLSHIFT 108#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 109 /* 2K cluster can hold Ether frame */ 110#endif /* MCLSHIFT */ 111 112#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 113 114#ifndef NMBCLUSTERS_MAX 115#define NMBCLUSTERS_MAX (0x2000000 / MCLBYTES) /* Limit to 64MB for clusters */ 116#endif 117 118/* 119 * Compatibility /dev/zero mapping. 120 */ 121#ifdef _KERNEL 122#ifdef COMPAT_16 123#define COMPAT_ZERODEV(x) (x == makedev(0, _DEV_ZERO_oARM)) 124#endif 125#endif /* _KERNEL */ 126 127#endif /* _ARM_PARAM_H_ */ 128