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 * $FreeBSD$ 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 >= 7 58 #define _V_SUFFIX "v7" 59 #elif __ARM_ARCH >= 6 60 #define _V_SUFFIX "v6" 61 #else 62 #define _V_SUFFIX "" 63 #endif 64 65 #ifdef __ARM_BIG_ENDIAN 66 #define _EB_SUFFIX "eb" 67 #else 68 #define _EB_SUFFIX "" 69 #endif 70 71 #ifndef MACHINE 72 #define MACHINE "arm" 73 #endif 74 #ifndef MACHINE_ARCH 75 #define MACHINE_ARCH "arm" _V_SUFFIX _EB_SUFFIX 76 #endif 77 78 #if defined(SMP) || defined(KLD_MODULE) 79 #ifndef MAXCPU 80 #define MAXCPU 4 81 #endif 82 #else 83 #define MAXCPU 1 84 #endif /* SMP || KLD_MODULE */ 85 86 #ifndef MAXMEMDOM 87 #define MAXMEMDOM 1 88 #endif 89 90 #define ALIGNBYTES _ALIGNBYTES 91 #define ALIGN(p) _ALIGN(p) 92 /* 93 * ALIGNED_POINTER is a boolean macro that checks whether an address 94 * is valid to fetch data elements of type t from on this architecture. 95 * This does not reflect the optimal alignment, just the possibility 96 * (within reasonable limits). 97 * 98 * armv4 and v5 require alignment to the type's size. armv6 requires 8-byte 99 * alignment for the ldrd/strd instructions, but otherwise follows armv7 rules. 100 * armv7 requires that an 8-byte type be aligned to at least a 4-byte boundary; 101 * access to smaller types can be unaligned, except that the compiler may 102 * optimize access to adjacent uint32_t values into a single load/store-multiple 103 * instruction which requires 4-byte alignment, so we must provide the most- 104 * pessimistic answer possible even on armv7. 105 */ 106 #define ALIGNED_POINTER(p, t) ((((unsigned)(p)) & (sizeof(t)-1)) == 0) 107 108 /* 109 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 110 * architecture. It should be used with appropriate caution. 111 */ 112 #define CACHE_LINE_SHIFT 6 113 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 114 115 #define PAGE_SHIFT 12 116 #define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */ 117 #define PAGE_MASK (PAGE_SIZE - 1) 118 119 #define PDR_SHIFT 20 /* log2(NBPDR) */ 120 #define NBPDR (1 << PDR_SHIFT) 121 #define PDRMASK (NBPDR - 1) 122 #define NPDEPG (1 << (32 - PDR_SHIFT)) 123 124 #define MAXPAGESIZES 2 /* maximum number of supported page sizes */ 125 126 #ifndef KSTACK_PAGES 127 #define KSTACK_PAGES 2 128 #endif /* !KSTACK_PAGES */ 129 130 #ifndef FPCONTEXTSIZE 131 #define FPCONTEXTSIZE (0x100) 132 #endif 133 134 #ifndef KSTACK_GUARD_PAGES 135 #define KSTACK_GUARD_PAGES 1 136 #endif /* !KSTACK_GUARD_PAGES */ 137 138 #define USPACE_SVC_STACK_TOP (kstack_pages * PAGE_SIZE) 139 140 /* 141 * Mach derived conversion macros 142 */ 143 #define trunc_page(x) ((x) & ~PAGE_MASK) 144 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 145 #define trunc_1mpage(x) ((unsigned)(x) & ~PDRMASK) 146 #define round_1mpage(x) ((((unsigned)(x)) + PDRMASK) & ~PDRMASK) 147 148 #define atop(x) ((unsigned)(x) >> PAGE_SHIFT) 149 #define ptoa(x) ((unsigned)(x) << PAGE_SHIFT) 150 151 #define arm32_btop(x) ((unsigned)(x) >> PAGE_SHIFT) 152 #define arm32_ptob(x) ((unsigned)(x) << PAGE_SHIFT) 153 154 #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 155 156 #endif /* !_ARM_INCLUDE_PARAM_H_ */ 157