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 _AARCH64_PARAM_H_ 36 #define _AARCH64_PARAM_H_ 37 38 // TODO: These were based on the ARMv7 version. Verify that it is correct. 39 40 /* 41 * Machine dependent constants for all ARM processors 42 */ 43 44 /* 45 * For KERNEL code: 46 * MACHINE must be defined by the individual port. This is so that 47 * uname returns the correct thing, etc. 48 * 49 * MACHINE_ARCH may be defined by individual ports as a temporary 50 * measure while we're finishing the conversion to ELF. 51 * 52 * For non-KERNEL code: 53 * If ELF, MACHINE and MACHINE_ARCH are forced to "arm/armeb". 54 */ 55 56 #if defined(_KERNEL) 57 #undef _MACHINE 58 #undef MACHINE 59 #undef _MACHINE_ARCH 60 #undef MACHINE_ARCH 61 #define _MACHINE aarch64 62 #define MACHINE "aarch64" 63 #define _MACHINE_ARCH aarch64 64 #define MACHINE_ARCH "aarch64" 65 #endif /* !_KERNEL */ 66 67 #define MID_MACHINE MID_AARCH64 68 69 /* 70 * Round p (pointer or byte index) up to a correctly-aligned value 71 * for all data types (int, long, ...). The result is u_int and 72 * must be cast to any desired pointer type. 73 * 74 * ALIGNED_POINTER is a boolean macro that checks whether an address 75 * is valid to fetch data elements of type t from on this architecture. 76 * This does not reflect the optimal alignment, just the possibility 77 * (within reasonable limits). 78 * 79 */ 80 #define ALIGNBYTES (sizeof(int) - 1) 81 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 82 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 83 /* ARM-specific macro to align a stack pointer (downwards). */ 84 #define STACKALIGNBYTES (8 - 1) 85 #define STACKALIGN(p) ((u_int)(p) &~ STACKALIGNBYTES) 86 87 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 88 #define DEV_BSIZE (1 << DEV_BSHIFT) 89 #define BLKDEV_IOSIZE 2048 90 91 #ifndef MAXPHYS 92 #define MAXPHYS 65536 /* max I/O transfer size */ 93 #endif 94 95 /* 96 * Constants related to network buffer management. 97 * MCLBYTES must be no larger than NBPG (the software page size), and, 98 * on machines that exchange pages of input or output buffers with mbuf 99 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 100 * of the hardware page size. 101 */ 102 #define MSIZE 256 /* size of an mbuf */ 103 104 #ifndef MCLSHIFT 105 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 106 /* 2K cluster can hold Ether frame */ 107 #endif /* MCLSHIFT */ 108 109 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 110 111 #ifndef NMBCLUSTERS_MAX 112 #define NMBCLUSTERS_MAX (0x2000000 / MCLBYTES) /* Limit to 64MB for clusters */ 113 #endif 114 115 /* 116 * Compatibility /dev/zero mapping. 117 */ 118 #ifdef _KERNEL 119 #ifdef COMPAT_16 120 #define COMPAT_ZERODEV(x) (x == makedev(0, _DEV_ZERO_oARM)) 121 #endif 122 #endif /* _KERNEL */ 123 124 #endif /* _AARCH64_PARAM_H_ */ 125