1 /* $NetBSD: param.h,v 1.3 2018/04/28 10:53:02 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _AARCH64_PARAM_H_ 33 #define _AARCH64_PARAM_H_ 34 35 #ifdef __aarch64__ 36 37 /* 38 * Machine dependent constants for all ARM processors 39 */ 40 41 /* 42 * For KERNEL code: 43 * MACHINE must be defined by the individual port. This is so that 44 * uname returns the correct thing, etc. 45 * 46 * MACHINE_ARCH may be defined by individual ports as a temporary 47 * measure while we're finishing the conversion to ELF. 48 * 49 * For non-KERNEL code: 50 * If ELF, MACHINE and MACHINE_ARCH are forced to "arm/armeb". 51 */ 52 53 #if defined(_KERNEL) 54 # ifndef MACHINE_ARCH /* XXX For now */ 55 # ifdef __AARCH64EB__ 56 # define _MACHINE_ARCH aarch64eb 57 # define MACHINE_ARCH "aarch64eb" 58 # else 59 # define _MACHINE_ARCH aarch64 60 # define MACHINE_ARCH "aarch64" 61 # endif /* __AARCH64EB__ */ 62 # endif /* MACHINE_ARCH */ 63 #else 64 # undef _MACHINE 65 # undef MACHINE 66 # undef _MACHINE_ARCH 67 # undef MACHINE_ARCH 68 # define _MACHINE aarch64 69 # define MACHINE "aarch64" 70 # ifdef __AARCH64EB__ 71 # define _MACHINE_ARCH aarch64eb 72 # define MACHINE_ARCH "aarch64eb" 73 # else 74 # define _MACHINE_ARCH aarch64 75 # define MACHINE_ARCH "aarch64" 76 # endif /* __AARCH64EB__ */ 77 #endif /* !_KERNEL */ 78 79 #define MID_MACHINE MID_AARCH64 80 81 /* AARCH64-specific macro to align a stack pointer (downwards). */ 82 #define STACK_ALIGNBYTES (16 - 1) 83 #define ALIGNBYTES32 7 84 85 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 86 #define DEV_BSIZE (1 << DEV_BSHIFT) 87 #define BLKDEV_IOSIZE 2048 88 89 #ifndef MAXPHYS 90 #define MAXPHYS 65536 /* max I/O transfer size */ 91 #endif 92 93 #define NKMEMPAGES_MAX_DEFAULT ((2048UL * 1024 * 1024) >> PAGE_SHIFT) 94 #define NKMEMPAGES_MIN_DEFAULT ((128UL * 1024 * 1024) >> PAGE_SHIFT) 95 96 #ifdef AARCH64_PAGE_SHIFT 97 #if (1 << AARCH64_PAGE_SHIFT) & ~0x141000 98 #error AARCH64_PAGE_SHIFT contains an unsupported value. 99 #endif 100 #define PGSHIFT AARCH64_PAGE_SHIFT 101 #else 102 #define PGSHIFT 12 103 #endif 104 #define NBPG (1 << PGSHIFT) 105 #define PGOFSET (NBPG - 1) 106 107 /* 108 * Constants related to network buffer management. 109 * MCLBYTES must be no larger than NBPG (the software page size), and 110 * NBPG % MCLBYTES must be zero. 111 */ 112 #if PGSHIFT > 12 113 #define MSIZE 256 /* size of an mbuf */ 114 #else 115 #define MSIZE 512 /* size of an mbuf */ 116 #endif 117 118 #ifndef MCLSHIFT 119 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 120 /* 2K cluster can hold Ether frame */ 121 #endif /* MCLSHIFT */ 122 123 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 124 125 126 #ifndef MSGBUFSIZE 127 #define MSGBUFSIZE 16384 /* default message buffer size */ 128 #endif 129 130 #ifdef _KERNEL 131 void delay(unsigned int); 132 #define DELAY(x) delay(x) 133 #endif 134 /* 135 * Compatibility /dev/zero mapping. 136 */ 137 #ifdef _KERNEL 138 #ifdef COMPAT_16 139 #define COMPAT_ZERODEV(x) (x == makedev(0, _DEV_ZERO_oARM)) 140 #endif 141 #endif /* _KERNEL */ 142 143 #define aarch64_btop(x) ((unsigned long)(x) >> PGSHIFT) 144 #define aarch64_ptob(x) ((unsigned long)(x) << PGSHIFT) 145 #define aarch64_trunc_page(x) ((unsigned long)(x) & ~PGSHIFT) 146 #define aarch64_round_page(x) ((((unsigned long)(x)) + PGOFSET) & ~PGOFSET) 147 148 /* compatibility for arm */ 149 #define arm_btop(x) aarch64_btop(x) 150 #define arm_ptob(x) aarch64_ptob(x) 151 #define arm_trunc_page(x) aarch64_trunc_page(x) 152 #define arm_round_page(x) aarch64_round_page(x) 153 154 #elif defined(__arm__) 155 156 #include <arm/param.h> 157 158 #endif /* __aarch64__/__arm__ */ 159 160 #endif /* _AARCH64_PARAM_H_ */ 161