param.h revision 1.12
1/* $NetBSD: param.h,v 1.12 2008/08/29 19:08:29 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#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/* 83 * Round p (pointer or byte index) up to a correctly-aligned value 84 * for all data types (int, long, ...). The result is u_int and 85 * must be cast to any desired pointer type. 86 * 87 * ALIGNED_POINTER is a boolean macro that checks whether an address 88 * is valid to fetch data elements of type t from on this architecture. 89 * This does not reflect the optimal alignment, just the possibility 90 * (within reasonable limits). 91 * 92 */ 93#define ALIGNBYTES (sizeof(int) - 1) 94#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 95#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 96/* ARM-specific macro to align a stack pointer (downwards). */ 97#define STACKALIGNBYTES (8 - 1) 98#define STACKALIGN(p) ((u_int)(p) &~ STACKALIGNBYTES) 99 100#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 101#define DEV_BSIZE (1 << DEV_BSHIFT) 102#define BLKDEV_IOSIZE 2048 103 104#ifndef MAXPHYS 105#define MAXPHYS 65536 /* max I/O transfer size */ 106#endif 107 108/* 109 * Constants related to network buffer management. 110 * MCLBYTES must be no larger than NBPG (the software page size), and, 111 * on machines that exchange pages of input or output buffers with mbuf 112 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 113 * of the hardware page size. 114 */ 115#define MSIZE 256 /* size of an mbuf */ 116 117#ifndef MCLSHIFT 118#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 119 /* 2K cluster can hold Ether frame */ 120#endif /* MCLSHIFT */ 121 122#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 123 124/* 125 * Compatibility /dev/zero mapping. 126 */ 127#ifdef _KERNEL 128#ifdef COMPAT_16 129#define COMPAT_ZERODEV(x) (x == makedev(0, _DEV_ZERO_oARM)) 130#endif 131#endif /* _KERNEL */ 132 133#endif /* _ARM_PARAM_H_ */ 134