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 40 #ifndef _ARM_INCLUDE_PARAM_H_ 41 #define _ARM_INCLUDE_PARAM_H_ 42 43 /* 44 * Machine dependent constants for StrongARM 45 */ 46 47 #include <sys/_align.h> 48 49 #define STACKALIGNBYTES (8 - 1) 50 51 #ifndef MACHINE 52 #define MACHINE "arm" 53 #endif 54 #ifndef MACHINE_ARCH 55 #define MACHINE_ARCH "armv7" 56 #endif 57 58 #ifdef SMP 59 #ifndef MAXCPU 60 #define MAXCPU 4 61 #endif 62 #else 63 #define MAXCPU 1 64 #endif 65 66 #ifndef MAXMEMDOM 67 #define MAXMEMDOM 1 68 #endif 69 70 #define __HAVE_STATIC_DEVMAP 71 72 #define ALIGNBYTES _ALIGNBYTES 73 #define ALIGN(p) _ALIGN(p) 74 /* 75 * ALIGNED_POINTER is a boolean macro that checks whether an address 76 * is valid to fetch data elements of type t from on this architecture. 77 * This does not reflect the optimal alignment, just the possibility 78 * (within reasonable limits). 79 * 80 * armv7 requires that an 8-byte type be aligned to at least a 4-byte boundary; 81 * access to smaller types can be unaligned, except that the compiler may 82 * optimize access to adjacent uint32_t values into a single load/store-multiple 83 * instruction which requires 4-byte alignment, so we must provide the most- 84 * pessimistic answer possible even on armv7. 85 */ 86 #define ALIGNED_POINTER(p, t) ((((unsigned)(p)) & (sizeof(t)-1)) == 0) 87 88 /* 89 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 90 * architecture. It should be used with appropriate caution. 91 */ 92 #define CACHE_LINE_SHIFT 6 93 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 94 95 #define PAGE_SHIFT 12 96 #define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */ 97 #define PAGE_MASK (PAGE_SIZE - 1) 98 99 #define PDR_SHIFT 20 /* log2(NBPDR) */ 100 #define NBPDR (1 << PDR_SHIFT) 101 #define PDRMASK (NBPDR - 1) 102 #define NPDEPG (1 << (32 - PDR_SHIFT)) 103 104 #define MAXPAGESIZES 2 /* maximum number of supported page sizes */ 105 106 #ifndef KSTACK_PAGES 107 #define KSTACK_PAGES 2 108 #endif /* !KSTACK_PAGES */ 109 110 #ifndef FPCONTEXTSIZE 111 #define FPCONTEXTSIZE (0x100) 112 #endif 113 114 #ifndef KSTACK_GUARD_PAGES 115 #define KSTACK_GUARD_PAGES 1 116 #endif /* !KSTACK_GUARD_PAGES */ 117 118 #define USPACE_SVC_STACK_TOP (kstack_pages * PAGE_SIZE) 119 120 /* 121 * Mach derived conversion macros 122 */ 123 #define trunc_1mpage(x) ((unsigned)(x) & ~PDRMASK) 124 #define round_1mpage(x) ((((unsigned)(x)) + PDRMASK) & ~PDRMASK) 125 126 #define arm32_btop(x) ((unsigned)(x) >> PAGE_SHIFT) 127 #define arm32_ptob(x) ((unsigned)(x) << PAGE_SHIFT) 128 129 #endif /* !_ARM_INCLUDE_PARAM_H_ */ 130