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