1 /* $OpenBSD: param.h,v 1.11 1998/08/30 22:05:35 millert Exp $ */
4 * SPDX-License-Identifier: BSD-3-Clause
6 * Copyright (c) 1988 University of Utah.
7 * Copyright (c) 1992, 1993
8 * The Regents of the University of California. All rights reserved.
10 * This code is derived from software contributed to Berkeley by
11 * the Systems Programming Group of the University of Utah Computer
12 * Science Department and Ralph Campbell.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * from: Utah Hdr: machparam.h 1.11 89/08/14
39 * from: @(#)param.h 8.1 (Berkeley) 6/10/93
40 * JNPR: param.h,v 1.6.2.1 2007/09/10 07:49:36 girish
44 #ifndef _MIPS_INCLUDE_PARAM_H_
45 #define _MIPS_INCLUDE_PARAM_H_
47 #include <machine/_align.h>
49 #include <sys/cdefs.h>
52 #include <machine/cpu.h>
56 #define __PCI_REROUTE_INTERRUPT
58 #if _BYTE_ORDER == _BIG_ENDIAN
59 # define _EL_SUFFIX ""
61 # define _EL_SUFFIX "el"
65 # define _N64_SUFFIX "64"
66 #elif defined(__mips_n32)
67 # define _N64_SUFFIX "n32"
69 # define _N64_SUFFIX ""
72 #ifdef __mips_hard_float
73 # define _HF_SUFFIX "hf"
75 # define _HF_SUFFIX ""
79 # define MACHINE "mips"
82 # define MACHINE_ARCH "mips" _N64_SUFFIX _EL_SUFFIX _HF_SUFFIX
85 # ifndef MACHINE_ARCH32
86 # define MACHINE_ARCH32 "mips" _EL_SUFFIX _HF_SUFFIX
91 * OBJFORMAT_NAMES is a comma-separated list of the object formats
92 * that are supported on the architecture.
94 #define OBJFORMAT_NAMES "elf"
95 #define OBJFORMAT_DEFAULT "elf"
97 #define MID_MACHINE 0 /* None but has to be defined */
102 #define MAXCPU MAXSMPCPU
114 * Round p (pointer or byte index) up to a correctly-aligned value for all
115 * data types (int, long, ...). The result is u_int and must be cast to
116 * any desired pointer type.
119 #define ALIGNBYTES _ALIGNBYTES
120 #define ALIGN(p) _ALIGN(p)
122 * ALIGNED_POINTER is a boolean macro that checks whether an address
123 * is valid to fetch data elements of type t from on this architecture.
124 * This does not reflect the optimal alignment, just the possibility
125 * (within reasonable limits).
127 #define ALIGNED_POINTER(p, t) ((((unsigned long)(p)) & (sizeof (t) - 1)) == 0)
130 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
131 * architecture. It should be used with appropriate caution.
133 #define CACHE_LINE_SHIFT 6
134 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT)
136 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
137 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */
138 #define PAGE_MASK (PAGE_SIZE-1)
140 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
141 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
143 #if defined(__mips_n32) || defined(__mips_n64) /* PHYSADDR_64_BIT */
144 #define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */
146 #define NPTEPGSHIFT 10 /* LOG2(NPTEPG) */
150 #define NPDEPGSHIFT 9 /* LOG2(NPTEPG) */
151 #define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT + NPDEPGSHIFT)
152 #define NBSEG (1ul << SEGSHIFT)
153 #define PDRSHIFT (PAGE_SHIFT + NPTEPGSHIFT)
154 #define PDRSIZE (1ul << PDRSHIFT)
155 #define PDRMASK ((1 << PDRSHIFT) - 1)
157 #define NPDEPGSHIFT 10 /* LOG2(NPTEPG) */
158 #define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT)
159 #define NBSEG (1 << SEGSHIFT) /* bytes/segment */
160 #define PDRSHIFT SEGSHIFT /* alias for SEG in 32 bit */
161 #define PDRSIZE (1ul << PDRSHIFT)
162 #define PDRMASK ((1 << PDRSHIFT) - 1)
164 #define NBPDR (1 << PDRSHIFT) /* bytes/pagedir */
165 #define SEGMASK (NBSEG - 1) /* byte offset into segment */
167 #define MAXPAGESIZES 1 /* max supported pagesizes */
169 #define MAXDUMPPGS 1 /* xxx: why is this only one? */
172 * The kernel stack needs to be aligned on a (PAGE_SIZE * 2) boundary.
174 #define KSTACK_PAGES 2 /* kernel stack */
175 #define KSTACK_GUARD_PAGES 2 /* pages of kstack guard; 0 disables */
178 * Mach derived conversion macros
180 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
181 #define trunc_page(x) ((x) & ~PAGE_MASK)
183 #define atop(x) ((x) >> PAGE_SHIFT)
184 #define ptoa(x) ((x) << PAGE_SHIFT)
186 #define pgtok(x) ((x) * (PAGE_SIZE / 1024))
188 #endif /* !_MIPS_INCLUDE_PARAM_H_ */