xref: /freebsd/sys/amd64/include/param.h (revision 06e20d1babecec1f45ffda513f55a8db5f1c0f56)
1 /*-
2  * SPDX-License-Identifier: BSD-4-Clause
3  *
4  * Copyright (c) 2002 David E. O'Brien.  All rights reserved.
5  * Copyright (c) 1992, 1993
6  *	The Regents of the University of California.  All rights reserved.
7  *
8  * This code is derived from software contributed to Berkeley by
9  * the Systems Programming Group of the University of Utah Computer
10  * Science Department and Ralph Campbell.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  * 3. All advertising materials mentioning features or use of this software
21  *    must display the following acknowledgement:
22  *	This product includes software developed by the University of
23  *	California, Berkeley and its contributors.
24  * 4. Neither the name of the University nor the names of its contributors
25  *    may be used to endorse or promote products derived from this software
26  *    without specific prior written permission.
27  *
28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38  * SUCH DAMAGE.
39  *
40  *	@(#)param.h	8.1 (Berkeley) 6/10/93
41  * $FreeBSD$
42  */
43 
44 
45 #ifndef _AMD64_INCLUDE_PARAM_H_
46 #define	_AMD64_INCLUDE_PARAM_H_
47 
48 #include <machine/_align.h>
49 
50 /*
51  * Machine dependent constants for AMD64.
52  */
53 
54 
55 #define __HAVE_ACPI
56 #define __PCI_REROUTE_INTERRUPT
57 
58 #ifndef MACHINE
59 #define	MACHINE		"amd64"
60 #endif
61 #ifndef MACHINE_ARCH
62 #define	MACHINE_ARCH	"amd64"
63 #endif
64 #ifndef MACHINE_ARCH32
65 #define	MACHINE_ARCH32	"i386"
66 #endif
67 
68 #ifdef SMP
69 #ifndef MAXCPU
70 #define MAXCPU		256
71 #endif
72 #else
73 #define MAXCPU		1
74 #endif
75 
76 #ifndef MAXMEMDOM
77 #define	MAXMEMDOM	8
78 #endif
79 
80 #define	ALIGNBYTES		_ALIGNBYTES
81 #define	ALIGN(p)		_ALIGN(p)
82 /*
83  * ALIGNED_POINTER is a boolean macro that checks whether an address
84  * is valid to fetch data elements of type t from on this architecture.
85  * This does not reflect the optimal alignment, just the possibility
86  * (within reasonable limits).
87  */
88 #define	ALIGNED_POINTER(p, t)	1
89 
90 /*
91  * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
92  * architecture.  It should be used with appropriate caution.
93  */
94 #define	CACHE_LINE_SHIFT	6
95 #define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
96 
97 /* Size of the level 1 page table units */
98 #define NPTEPG		(PAGE_SIZE/(sizeof (pt_entry_t)))
99 #define	NPTEPGSHIFT	9		/* LOG2(NPTEPG) */
100 #define PAGE_SHIFT	12		/* LOG2(PAGE_SIZE) */
101 #define PAGE_SIZE	(1<<PAGE_SHIFT)	/* bytes/page */
102 #define PAGE_MASK	(PAGE_SIZE-1)
103 /* Size of the level 2 page directory units */
104 #define	NPDEPG		(PAGE_SIZE/(sizeof (pd_entry_t)))
105 #define	NPDEPGSHIFT	9		/* LOG2(NPDEPG) */
106 #define	PDRSHIFT	21              /* LOG2(NBPDR) */
107 #define	NBPDR		(1<<PDRSHIFT)   /* bytes/page dir */
108 #define	PDRMASK		(NBPDR-1)
109 /* Size of the level 3 page directory pointer table units */
110 #define	NPDPEPG		(PAGE_SIZE/(sizeof (pdp_entry_t)))
111 #define	NPDPEPGSHIFT	9		/* LOG2(NPDPEPG) */
112 #define	PDPSHIFT	30		/* LOG2(NBPDP) */
113 #define	NBPDP		(1<<PDPSHIFT)	/* bytes/page dir ptr table */
114 #define	PDPMASK		(NBPDP-1)
115 /* Size of the level 4 page-map level-4 table units */
116 #define	NPML4EPG	(PAGE_SIZE/(sizeof (pml4_entry_t)))
117 #define	NPML4EPGSHIFT	9		/* LOG2(NPML4EPG) */
118 #define	PML4SHIFT	39		/* LOG2(NBPML4) */
119 #define	NBPML4		(1UL<<PML4SHIFT)/* bytes/page map lev4 table */
120 #define	PML4MASK	(NBPML4-1)
121 /* Size of the level 5 page-map level-5 table units */
122 #define	NPML5EPG	(PAGE_SIZE/(sizeof (pml5_entry_t)))
123 #define	NPML5EPGSHIFT	9		/* LOG2(NPML5EPG) */
124 #define	PML5SHIFT	48		/* LOG2(NBPML5) */
125 #define	NBPML5		(1UL<<PML5SHIFT)/* bytes/page map lev5 table */
126 #define	PML5MASK	(NBPML5-1)
127 
128 #define	MAXPAGESIZES	3	/* maximum number of supported page sizes */
129 
130 #define IOPAGES	2		/* pages of i/o permission bitmap */
131 /*
132  * I/O permission bitmap has a bit for each I/O port plus an additional
133  * byte at the end with all bits set. See section "I/O Permission Bit Map"
134  * in the Intel SDM for more details.
135  */
136 #define	IOPERM_BITMAP_SIZE	(IOPAGES * PAGE_SIZE + 1)
137 
138 #ifndef	KSTACK_PAGES
139 #define	KSTACK_PAGES	4	/* pages of kstack (with pcb) */
140 #endif
141 #define	KSTACK_GUARD_PAGES 1	/* pages of kstack guard; 0 disables */
142 
143 /*
144  * Mach derived conversion macros
145  */
146 #define	round_page(x)	((((unsigned long)(x)) + PAGE_MASK) & ~(PAGE_MASK))
147 #define	trunc_page(x)	((unsigned long)(x) & ~(PAGE_MASK))
148 #define trunc_2mpage(x)	((unsigned long)(x) & ~PDRMASK)
149 #define round_2mpage(x)	((((unsigned long)(x)) + PDRMASK) & ~PDRMASK)
150 #define trunc_1gpage(x)	((unsigned long)(x) & ~PDPMASK)
151 
152 #define	atop(x)		((unsigned long)(x) >> PAGE_SHIFT)
153 #define	ptoa(x)		((unsigned long)(x) << PAGE_SHIFT)
154 
155 #define	amd64_btop(x)	((unsigned long)(x) >> PAGE_SHIFT)
156 #define	amd64_ptob(x)	((unsigned long)(x) << PAGE_SHIFT)
157 
158 #define	pgtok(x)	((unsigned long)(x) * (PAGE_SIZE / 1024))
159 
160 #define	INKERNEL(va) (((va) >= DMAP_MIN_ADDRESS && (va) < DMAP_MAX_ADDRESS) \
161     || ((va) >= VM_MIN_KERNEL_ADDRESS && (va) < VM_MAX_KERNEL_ADDRESS))
162 
163 #ifdef SMP
164 #define SC_TABLESIZE    1024                     /* Must be power of 2. */
165 #endif
166 
167 #endif /* !_AMD64_INCLUDE_PARAM_H_ */
168