xref: /illumos-gate/usr/src/boot/sys/i386/include/param.h (revision 199767f8)
1*199767f8SToomas Soome /*-
2*199767f8SToomas Soome  * Copyright (c) 1990 The Regents of the University of California.
3*199767f8SToomas Soome  * All rights reserved.
4*199767f8SToomas Soome  *
5*199767f8SToomas Soome  * This code is derived from software contributed to Berkeley by
6*199767f8SToomas Soome  * William Jolitz.
7*199767f8SToomas Soome  *
8*199767f8SToomas Soome  * Redistribution and use in source and binary forms, with or without
9*199767f8SToomas Soome  * modification, are permitted provided that the following conditions
10*199767f8SToomas Soome  * are met:
11*199767f8SToomas Soome  * 1. Redistributions of source code must retain the above copyright
12*199767f8SToomas Soome  *    notice, this list of conditions and the following disclaimer.
13*199767f8SToomas Soome  * 2. Redistributions in binary form must reproduce the above copyright
14*199767f8SToomas Soome  *    notice, this list of conditions and the following disclaimer in the
15*199767f8SToomas Soome  *    documentation and/or other materials provided with the distribution.
16*199767f8SToomas Soome  * 4. Neither the name of the University nor the names of its contributors
17*199767f8SToomas Soome  *    may be used to endorse or promote products derived from this software
18*199767f8SToomas Soome  *    without specific prior written permission.
19*199767f8SToomas Soome  *
20*199767f8SToomas Soome  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21*199767f8SToomas Soome  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22*199767f8SToomas Soome  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23*199767f8SToomas Soome  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24*199767f8SToomas Soome  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25*199767f8SToomas Soome  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26*199767f8SToomas Soome  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27*199767f8SToomas Soome  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28*199767f8SToomas Soome  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29*199767f8SToomas Soome  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30*199767f8SToomas Soome  * SUCH DAMAGE.
31*199767f8SToomas Soome  *
32*199767f8SToomas Soome  *	from: @(#)param.h	5.8 (Berkeley) 6/28/91
33*199767f8SToomas Soome  * $FreeBSD$
34*199767f8SToomas Soome  */
35*199767f8SToomas Soome 
36*199767f8SToomas Soome 
37*199767f8SToomas Soome #ifndef _I386_INCLUDE_PARAM_H_
38*199767f8SToomas Soome #define	_I386_INCLUDE_PARAM_H_
39*199767f8SToomas Soome 
40*199767f8SToomas Soome #include <machine/_align.h>
41*199767f8SToomas Soome 
42*199767f8SToomas Soome /*
43*199767f8SToomas Soome  * Machine dependent constants for Intel 386.
44*199767f8SToomas Soome  */
45*199767f8SToomas Soome 
46*199767f8SToomas Soome 
47*199767f8SToomas Soome #define __HAVE_ACPI
48*199767f8SToomas Soome #define	__HAVE_PIR
49*199767f8SToomas Soome #define __PCI_REROUTE_INTERRUPT
50*199767f8SToomas Soome 
51*199767f8SToomas Soome #ifndef MACHINE
52*199767f8SToomas Soome #define MACHINE		"i386"
53*199767f8SToomas Soome #endif
54*199767f8SToomas Soome #ifndef MACHINE_ARCH
55*199767f8SToomas Soome #define	MACHINE_ARCH	"i386"
56*199767f8SToomas Soome #endif
57*199767f8SToomas Soome #define MID_MACHINE	MID_I386
58*199767f8SToomas Soome 
59*199767f8SToomas Soome #if defined(SMP) || defined(KLD_MODULE)
60*199767f8SToomas Soome #ifndef MAXCPU
61*199767f8SToomas Soome #define MAXCPU		32
62*199767f8SToomas Soome #endif
63*199767f8SToomas Soome #else
64*199767f8SToomas Soome #define MAXCPU		1
65*199767f8SToomas Soome #endif /* SMP || KLD_MODULE */
66*199767f8SToomas Soome 
67*199767f8SToomas Soome #ifndef MAXMEMDOM
68*199767f8SToomas Soome #define	MAXMEMDOM	1
69*199767f8SToomas Soome #endif
70*199767f8SToomas Soome 
71*199767f8SToomas Soome #define ALIGNBYTES	_ALIGNBYTES
72*199767f8SToomas Soome #define ALIGN(p)	_ALIGN(p)
73*199767f8SToomas Soome /*
74*199767f8SToomas Soome  * ALIGNED_POINTER is a boolean macro that checks whether an address
75*199767f8SToomas Soome  * is valid to fetch data elements of type t from on this architecture.
76*199767f8SToomas Soome  * This does not reflect the optimal alignment, just the possibility
77*199767f8SToomas Soome  * (within reasonable limits).
78*199767f8SToomas Soome  */
79*199767f8SToomas Soome #define	ALIGNED_POINTER(p, t)	1
80*199767f8SToomas Soome 
81*199767f8SToomas Soome /*
82*199767f8SToomas Soome  * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
83*199767f8SToomas Soome  * architecture.  It should be used with appropriate caution.
84*199767f8SToomas Soome  */
85*199767f8SToomas Soome #define	CACHE_LINE_SHIFT	7
86*199767f8SToomas Soome #define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
87*199767f8SToomas Soome 
88*199767f8SToomas Soome #define PAGE_SHIFT	12		/* LOG2(PAGE_SIZE) */
89*199767f8SToomas Soome #define PAGE_SIZE	(1<<PAGE_SHIFT)	/* bytes/page */
90*199767f8SToomas Soome #define PAGE_MASK	(PAGE_SIZE-1)
91*199767f8SToomas Soome #define NPTEPG		(PAGE_SIZE/(sizeof (pt_entry_t)))
92*199767f8SToomas Soome 
93*199767f8SToomas Soome #if defined(PAE) || defined(PAE_TABLES)
94*199767f8SToomas Soome #define NPGPTD		4
95*199767f8SToomas Soome #define PDRSHIFT	21		/* LOG2(NBPDR) */
96*199767f8SToomas Soome #define NPGPTD_SHIFT	9
97*199767f8SToomas Soome #else
98*199767f8SToomas Soome #define NPGPTD		1
99*199767f8SToomas Soome #define PDRSHIFT	22		/* LOG2(NBPDR) */
100*199767f8SToomas Soome #define NPGPTD_SHIFT	10
101*199767f8SToomas Soome #endif
102*199767f8SToomas Soome 
103*199767f8SToomas Soome #define NBPTD		(NPGPTD<<PAGE_SHIFT)
104*199767f8SToomas Soome #define NPDEPTD		(NBPTD/(sizeof (pd_entry_t)))
105*199767f8SToomas Soome #define NPDEPG		(PAGE_SIZE/(sizeof (pd_entry_t)))
106*199767f8SToomas Soome #define NBPDR		(1<<PDRSHIFT)	/* bytes/page dir */
107*199767f8SToomas Soome #define PDRMASK		(NBPDR-1)
108*199767f8SToomas Soome 
109*199767f8SToomas Soome #define	MAXPAGESIZES	2	/* maximum number of supported page sizes */
110*199767f8SToomas Soome 
111*199767f8SToomas Soome #define IOPAGES	2		/* pages of i/o permission bitmap */
112*199767f8SToomas Soome 
113*199767f8SToomas Soome #ifndef KSTACK_PAGES
114*199767f8SToomas Soome #define KSTACK_PAGES 2		/* Includes pcb! */
115*199767f8SToomas Soome #endif
116*199767f8SToomas Soome #define KSTACK_GUARD_PAGES 1	/* pages of kstack guard; 0 disables */
117*199767f8SToomas Soome #if KSTACK_PAGES < 4
118*199767f8SToomas Soome #define	TD0_KSTACK_PAGES 4
119*199767f8SToomas Soome #else
120*199767f8SToomas Soome #define	TD0_KSTACK_PAGES KSTACK_PAGES
121*199767f8SToomas Soome #endif
122*199767f8SToomas Soome 
123*199767f8SToomas Soome /*
124*199767f8SToomas Soome  * Ceiling on amount of swblock kva space, can be changed via
125*199767f8SToomas Soome  * the kern.maxswzone /boot/loader.conf variable.
126*199767f8SToomas Soome  *
127*199767f8SToomas Soome  * 276 is sizeof(struct swblock), but we do not always have a definition
128*199767f8SToomas Soome  * in scope for struct swblock, so we have to hardcode it.  Each struct
129*199767f8SToomas Soome  * swblock holds metadata for 32 pages, so in theory, this is enough for
130*199767f8SToomas Soome  * 16 GB of swap.  In practice, however, the usable amount is considerably
131*199767f8SToomas Soome  * lower due to fragmentation.
132*199767f8SToomas Soome  */
133*199767f8SToomas Soome #ifndef VM_SWZONE_SIZE_MAX
134*199767f8SToomas Soome #define VM_SWZONE_SIZE_MAX	(276 * 128 * 1024)
135*199767f8SToomas Soome #endif
136*199767f8SToomas Soome 
137*199767f8SToomas Soome /*
138*199767f8SToomas Soome  * Ceiling on size of buffer cache (really only effects write queueing,
139*199767f8SToomas Soome  * the VM page cache is not effected), can be changed via
140*199767f8SToomas Soome  * the kern.maxbcache /boot/loader.conf variable.
141*199767f8SToomas Soome  *
142*199767f8SToomas Soome  * The value is equal to the size of the auto-tuned buffer map for
143*199767f8SToomas Soome  * the machine with 4GB of RAM, see vfs_bio.c:kern_vfs_bio_buffer_alloc().
144*199767f8SToomas Soome  */
145*199767f8SToomas Soome #ifndef VM_BCACHE_SIZE_MAX
146*199767f8SToomas Soome #define VM_BCACHE_SIZE_MAX	(7224 * 16 * 1024)
147*199767f8SToomas Soome #endif
148*199767f8SToomas Soome 
149*199767f8SToomas Soome /*
150*199767f8SToomas Soome  * Mach derived conversion macros
151*199767f8SToomas Soome  */
152*199767f8SToomas Soome #define trunc_page(x)		((x) & ~PAGE_MASK)
153*199767f8SToomas Soome #define round_page(x)		(((x) + PAGE_MASK) & ~PAGE_MASK)
154*199767f8SToomas Soome #define trunc_4mpage(x)		((x) & ~PDRMASK)
155*199767f8SToomas Soome #define round_4mpage(x)		((((x)) + PDRMASK) & ~PDRMASK)
156*199767f8SToomas Soome 
157*199767f8SToomas Soome #define atop(x)			((x) >> PAGE_SHIFT)
158*199767f8SToomas Soome #define ptoa(x)			((x) << PAGE_SHIFT)
159*199767f8SToomas Soome 
160*199767f8SToomas Soome #define i386_btop(x)		((x) >> PAGE_SHIFT)
161*199767f8SToomas Soome #define i386_ptob(x)		((x) << PAGE_SHIFT)
162*199767f8SToomas Soome 
163*199767f8SToomas Soome #define	pgtok(x)		((x) * (PAGE_SIZE / 1024))
164*199767f8SToomas Soome 
165*199767f8SToomas Soome #define INKERNEL(va)	(((vm_offset_t)(va)) >= VM_MAXUSER_ADDRESS && \
166*199767f8SToomas Soome     ((vm_offset_t)(va)) < VM_MAX_KERNEL_ADDRESS)
167*199767f8SToomas Soome 
168*199767f8SToomas Soome #endif /* !_I386_INCLUDE_PARAM_H_ */
169