Fix amd64 trap handling.
[dragonfly.git] / sys / cpu / amd64 / include / param.h
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1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
c8fe38ae 3 * Copyright (c) 2008 The DragonFly Project.
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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: src/sys/i386/include/param.h,v 1.54.2.8 2002/08/31 21:15:55 dillon Exp $
c8fe38ae 39 * $DragonFly: src/sys/cpu/amd64/include/param.h,v 1.4 2008/08/29 17:07:06 dillon Exp $
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40 */
41
42#ifndef _CPU_PARAM_H_
43
44/*
45 * Do not prevent re-includes of <machine/param.h> if the file was included
46 * with NO_NAMESPACE_POLLUTION, or expected macros will not exist.
47 */
48#ifndef _NO_NAMESPACE_POLLUTION
49#define _CPU_PARAM_H_
50#endif
51
52/*
02fc0ba7 53 * Machine dependent constants for x86_64.
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54 */
55#ifndef _CPU_PARAM_H1_
56#define _CPU_PARAM_H1_
57
58/*
59 * Round p (pointer or byte index) up to a correctly-aligned value
60 * for all data types (int, long, ...). The result is unsigned int
61 * and must be cast to any desired pointer type.
62 */
63#ifndef _ALIGNBYTES
64#define _ALIGNBYTES (sizeof(long) - 1)
65#endif
66#ifndef _ALIGN
67#define _ALIGN(p) (((unsigned long)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
68#endif
69
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70#ifndef _MACHINE
71#define _MACHINE amd64
fc3f9779 72#endif
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73#ifndef _MACHINE_ARCH
74#define _MACHINE_ARCH amd64
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75#endif
76
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77#endif /* _CPU_PARAM_H1_ */
78
79#ifndef _NO_NAMESPACE_POLLUTION
80
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81#ifndef MACHINE
82#define MACHINE "amd64"
fc3f9779 83#endif
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84#ifndef MACHINE_ARCH
85#define MACHINE_ARCH "amd64"
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86#endif
87
88/*
89 * Use SMP_MAXCPU instead of MAXCPU for structures that are intended to
90 * remain compatible between UP and SMP builds.
91 */
92#define SMP_MAXCPU 16
93#ifdef SMP
94#define MAXCPU SMP_MAXCPU
95#else
96#define MAXCPU 1
97#endif /* SMP */
98
99#define ALIGNBYTES _ALIGNBYTES
100#define ALIGN(p) _ALIGN(p)
101
c8fe38ae 102/* JG license? from fbsd/src/sys/amd64/include/param.h */
fc3f9779 103/* level 1 == page table */
c8fe38ae 104#define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */
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105#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
106#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */
107#define PAGE_MASK (PAGE_SIZE-1)
108#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
109
110/* level 2 == page directory */
c8fe38ae 111#define NPDEPGSHIFT 9 /* LOG2(NPDEPG) */
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112#define PDRSHIFT 21 /* LOG2(NBPDR) */
113#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */
114#define PDRMASK (NBPDR-1)
115#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
116
117/* level 3 == page directory pointer table */
c8fe38ae 118#define NPDPEPGSHIFT 9 /* LOG2(NPDPEPG) */
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119#define PDPSHIFT 30 /* LOG2(NBPDP) */
120#define NBPDP (1<<PDPSHIFT) /* bytes/page dir ptr table */
121#define PDPMASK (NBPDP-1)
122#define NPDPEPG (PAGE_SIZE/(sizeof (pdp_entry_t)))
123
124/* level 4 */
c8fe38ae 125#define NPML4EPGSHIFT 9 /* LOG2(NPML4EPG) */
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126#define PML4SHIFT 39 /* LOG2(NPML4) */
127#define NPML4 (1UL<<PML4SHIFT)/* bytes/page map level4 table */
c8fe38ae 128#define NBPML4 (1ul<<PML4SHIFT)/* bytes/page map lev4 table */
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129#define PML4MASK (NPML4-1)
130#define NPML4EPG (PAGE_SIZE/(sizeof (pml4_entry_t)))
131
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132#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
133#define DEV_BSIZE (1<<DEV_BSHIFT)
134#define DEV_BMASK (DEV_BSIZE - 1)
135
136#ifndef BLKDEV_IOSIZE
137#define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */
138#endif
139#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */
140#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */
141#define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE)
142
143#define IOPAGES 2 /* pages of i/o permission bitmap */
144#define UPAGES 3 /* pages of u-area */
145
146/*
147 * Ceiling on amount of swblock kva space, can be changed via
148 * kern.maxswzone /boot/loader.conf variable.
149 */
150#ifndef VM_SWZONE_SIZE_MAX
151#define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024)
152#endif
153
154/*
155 * Ceiling on size of buffer cache (really only effects write queueing,
156 * the VM page cache is not effected), can be changed via
157 * kern.maxbcache /boot/loader.conf variable.
158 */
159#ifndef VM_BCACHE_SIZE_MAX
160#define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024)
161#endif
162
163
164/*
165 * Constants related to network buffer management.
166 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
167 * on machines that exchange pages of input or output buffers with mbuf
168 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
169 * of the hardware page size.
170 */
171#ifndef MSIZE
c8fe38ae 172#define MSIZE 512 /* size of an mbuf */
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173#endif /* MSIZE */
174
175#ifndef MCLSHIFT
176#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
177#endif /* MCLSHIFT */
178#define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */
179#define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */
180
181/*
182 * Some macros for units conversion
183 */
184
185/* clicks to bytes */
186#define ctob(x) ((x)<<PAGE_SHIFT)
187
188/* bytes to clicks */
189#define btoc(x) (((unsigned)(x)+PAGE_MASK)>>PAGE_SHIFT)
190
191/*
192 * btodb() is messy and perhaps slow because `bytes' may be an off_t. We
193 * want to shift an unsigned type to avoid sign extension and we don't
194 * want to widen `bytes' unnecessarily. Assume that the result fits in
195 * a daddr_t.
196 */
197#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
198 (sizeof (bytes) > sizeof(long) \
199 ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \
200 : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT))
201
202#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
203 ((off_t)(db) << DEV_BSHIFT)
204
205/*
206 * Mach derived conversion macros
207 */
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208#define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(unsigned long)(PAGE_MASK))
209#define trunc_page(x) ((unsigned long)(x) & ~(unsigned long)(PAGE_MASK))
210#define trunc_2mpage(x) ((unsigned long)(x) & ~(unsigned long)PDRMASK)
211#define round_2mpage(x) ((((unsigned long)(x)) + PDRMASK) & ~(unsigned long)PDRMASK)
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212
213#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
c8fe38ae 214#define atop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT))
fc3f9779 215#endif
c8fe38ae 216#define ptoa(x) ((vm_paddr_t)(x) << PAGE_SHIFT)
fc3f9779 217
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218#define amd64_btop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT))
219#define amd64_ptob(x) ((vm_paddr_t)(x) << PAGE_SHIFT)
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220
221#define pgtok(x) ((x) * (PAGE_SIZE / 1024))
222
223#ifdef _KERNEL
224
225/*
226 * We put here the definition of two debugging macros/function which
227 * are very convenient to have available.
228 * The macro is called TSTMP() and is used to timestamp events in the
229 * kernel using the TSC register, and export them to userland through
230 * the sysctl variable debug.timestamp, which is a circular buffer
231 * holding pairs of u_int32_t variables <timestamp, argument> .
232 * They can be retrieved with something like
233 *
234 * sysctl -b debug.timestamp | hexdump -e '"%15u %15u\n"'
235 *
236 * The function _TSTMP() is defined in i386/isa/clock.c. It does not
237 * try to grab any locks or block interrupts or identify which CPU it
238 * is running on. You are supposed to know what to do if you use it.
239 *
240 * The macros must be enabled with "options KERN_TIMESTAMP" in the kernel
241 * config file, otherwise they default to an empty block.
242 */
243
244#ifdef KERN_TIMESTAMP
245extern void _TSTMP(u_int32_t argument);
246#define TSTMP(class, unit, event, par) _TSTMP( \
247 (((class) & 0x0f) << 28 ) | \
248 (((unit) & 0x0f) << 24 ) | \
249 (((event) & 0xff) << 16 ) | \
250 (((par) & 0xffff) ) )
251
252#else /* !KERN_TIMESTAMP */
253#define _TSTMP(x) {}
254#define TSTMP(class, unit, event, par) _TSTMP(0)
255#endif /* !KERN_TIMESTAMP */
256#endif /* _KERNEL */
257
258#endif /* !_NO_NAMESPACE_POLLUTION */
259#endif /* !_CPU_PARAM_H_ */