1 /* $NetBSD: param.h,v 1.13 2010/05/06 19:10:26 joerg 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 #ifndef NMBCLUSTERS_MAX 125 #define NMBCLUSTERS_MAX (0x2000000 / MCLBYTES) /* Limit to 64MB for clusters */ 126 #endif 127 128 /* 129 * Compatibility /dev/zero mapping. 130 */ 131 #ifdef _KERNEL 132 #ifdef COMPAT_16 133 #define COMPAT_ZERODEV(x) (x == makedev(0, _DEV_ZERO_oARM)) 134 #endif 135 #endif /* _KERNEL */ 136 137 #endif /* _ARM_PARAM_H_ */ 138