param.h revision 330897
1/*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 2001 David E. O'Brien 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * William Jolitz. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * from: @(#)param.h 5.8 (Berkeley) 6/28/91 40 * $FreeBSD: stable/11/sys/arm/include/param.h 330897 2018-03-14 03:19:51Z eadler $ 41 */ 42 43#ifndef _ARM_INCLUDE_PARAM_H_ 44#define _ARM_INCLUDE_PARAM_H_ 45 46/* 47 * Machine dependent constants for StrongARM 48 */ 49 50#include <machine/_align.h> 51 52#define STACKALIGNBYTES (8 - 1) 53#define STACKALIGN(p) ((u_int)(p) & ~STACKALIGNBYTES) 54 55#define __PCI_REROUTE_INTERRUPT 56 57#if __ARM_ARCH >= 6 58#define _V6_SUFFIX "v6" 59#else 60#define _V6_SUFFIX "" 61#endif 62 63#ifdef __ARM_BIG_ENDIAN 64#define _EB_SUFFIX "eb" 65#else 66#define _EB_SUFFIX "" 67#endif 68 69#ifndef MACHINE 70#define MACHINE "arm" 71#endif 72#ifndef MACHINE_ARCH 73#define MACHINE_ARCH "arm" _V6_SUFFIX _EB_SUFFIX 74#endif 75 76#if defined(SMP) || defined(KLD_MODULE) 77#ifndef MAXCPU 78#define MAXCPU 4 79#endif 80#else 81#define MAXCPU 1 82#endif /* SMP || KLD_MODULE */ 83 84#ifndef MAXMEMDOM 85#define MAXMEMDOM 1 86#endif 87 88#define ALIGNBYTES _ALIGNBYTES 89#define ALIGN(p) _ALIGN(p) 90/* 91 * ALIGNED_POINTER is a boolean macro that checks whether an address 92 * is valid to fetch data elements of type t from on this architecture. 93 * This does not reflect the optimal alignment, just the possibility 94 * (within reasonable limits). 95 * 96 * armv4 and v5 require alignment to the type's size. armv6 requires 8-byte 97 * alignment for the ldrd/strd instructions, but otherwise follows armv7 rules. 98 * armv7 requires that an 8-byte type be aligned to at least a 4-byte boundary; 99 * access to smaller types can be unaligned, except that the compiler may 100 * optimize access to adjacent uint32_t values into a single load/store-multiple 101 * instruction which requires 4-byte alignment, so we must provide the most- 102 * pessimistic answer possible even on armv7. 103 */ 104#define ALIGNED_POINTER(p, t) ((((unsigned)(p)) & (sizeof(t)-1)) == 0) 105 106/* 107 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 108 * architecture. It should be used with appropriate caution. 109 */ 110#define CACHE_LINE_SHIFT 6 111#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 112 113#define PAGE_SHIFT 12 114#define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */ 115#define PAGE_MASK (PAGE_SIZE - 1) 116 117#define PDR_SHIFT 20 /* log2(NBPDR) */ 118#define NBPDR (1 << PDR_SHIFT) 119#define PDRMASK (NBPDR - 1) 120#define NPDEPG (1 << (32 - PDR_SHIFT)) 121 122#define MAXPAGESIZES 2 /* maximum number of supported page sizes */ 123 124#ifndef KSTACK_PAGES 125#define KSTACK_PAGES 2 126#endif /* !KSTACK_PAGES */ 127 128#ifndef FPCONTEXTSIZE 129#define FPCONTEXTSIZE (0x100) 130#endif 131 132#ifndef KSTACK_GUARD_PAGES 133#define KSTACK_GUARD_PAGES 1 134#endif /* !KSTACK_GUARD_PAGES */ 135 136#define USPACE_SVC_STACK_TOP (kstack_pages * PAGE_SIZE) 137 138/* 139 * Mach derived conversion macros 140 */ 141#define trunc_page(x) ((x) & ~PAGE_MASK) 142#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 143#define trunc_1mpage(x) ((unsigned)(x) & ~PDRMASK) 144#define round_1mpage(x) ((((unsigned)(x)) + PDRMASK) & ~PDRMASK) 145 146#define atop(x) ((unsigned)(x) >> PAGE_SHIFT) 147#define ptoa(x) ((unsigned)(x) << PAGE_SHIFT) 148 149#define arm32_btop(x) ((unsigned)(x) >> PAGE_SHIFT) 150#define arm32_ptob(x) ((unsigned)(x) << PAGE_SHIFT) 151 152#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 153 154#endif /* !_ARM_INCLUDE_PARAM_H_ */ 155