xref: /freebsd/sys/arm64/include/param.h (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)
1 /*-
2  * Copyright (c) 1990 The Regents of the University of California.
3  * All rights reserved.
4  *
5  * This code is derived from software contributed to Berkeley by
6  * William Jolitz.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  *	from: @(#)param.h	5.8 (Berkeley) 6/28/91
30  * $FreeBSD$
31  */
32 
33 #ifndef _MACHINE_PARAM_H_
34 #define	_MACHINE_PARAM_H_
35 
36 /*
37  * Machine dependent constants for arm64.
38  */
39 
40 #include <machine/_align.h>
41 
42 #define	STACKALIGNBYTES	(16 - 1)
43 #define	STACKALIGN(p)	((uint64_t)(p) & ~STACKALIGNBYTES)
44 
45 #define	__PCI_REROUTE_INTERRUPT
46 
47 #ifndef MACHINE
48 #define	MACHINE		"arm64"
49 #endif
50 #ifndef MACHINE_ARCH
51 #define	MACHINE_ARCH	"aarch64"
52 #endif
53 #ifndef MACHINE_ARCH32
54 #define	MACHINE_ARCH32	"armv7"
55 #endif
56 
57 #ifdef SMP
58 #ifndef MAXCPU
59 #define	MAXCPU		256
60 #endif
61 #else
62 #define	MAXCPU		1
63 #endif
64 
65 #ifndef MAXMEMDOM
66 #define	MAXMEMDOM	8
67 #endif
68 
69 #define	ALIGNBYTES	_ALIGNBYTES
70 #define	ALIGN(p)	_ALIGN(p)
71 /*
72  * ALIGNED_POINTER is a boolean macro that checks whether an address
73  * is valid to fetch data elements of type t from on this architecture.
74  * This does not reflect the optimal alignment, just the possibility
75  * (within reasonable limits).
76  */
77 #define	ALIGNED_POINTER(p, t)	((((u_long)(p)) & (sizeof(t) - 1)) == 0)
78 
79 /*
80  * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
81  * architecture.  It should be used with appropriate caution.
82  */
83 #define	CACHE_LINE_SHIFT	7
84 #define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
85 
86 #define	PAGE_SHIFT_4K	12
87 #define	PAGE_SIZE_4K	(1 << PAGE_SHIFT_4K)
88 #define	PAGE_MASK_4K	(PAGE_SIZE_4K - 1)
89 
90 #define	PAGE_SHIFT_16K	14
91 #define	PAGE_SIZE_16K	(1 << PAGE_SHIFT_16K)
92 #define	PAGE_MASK_16K	(PAGE_SIZE_16K - 1)
93 
94 #define	PAGE_SHIFT_64K	16
95 #define	PAGE_SIZE_64K	(1 << PAGE_SHIFT_64K)
96 #define	PAGE_MASK_64K	(PAGE_SIZE_64K - 1)
97 
98 #define	PAGE_SHIFT	PAGE_SHIFT_4K
99 #define	PAGE_SIZE	PAGE_SIZE_4K
100 #define	PAGE_MASK	PAGE_MASK_4K
101 
102 #define	MAXPAGESIZES	3		/* maximum number of supported page sizes */
103 
104 #ifndef KSTACK_PAGES
105 #define	KSTACK_PAGES	4	/* pages of kernel stack (with pcb) */
106 #endif
107 
108 #define	KSTACK_GUARD_PAGES	1	/* pages of kstack guard; 0 disables */
109 #define	PCPU_PAGES		1
110 
111 /*
112  * Ceiling on size of buffer cache (really only effects write queueing,
113  * the VM page cache is not effected), can be changed via
114  * the kern.maxbcache /boot/loader.conf variable.
115  */
116 #ifndef VM_BCACHE_SIZE_MAX
117 #define	VM_BCACHE_SIZE_MAX      (400 * 1024 * 1024)
118 #endif
119 
120 /*
121  * Mach derived conversion macros
122  */
123 #define	round_page(x)		(((unsigned long)(x) + PAGE_MASK) & ~PAGE_MASK)
124 #define	trunc_page(x)		((unsigned long)(x) & ~PAGE_MASK)
125 
126 #define	atop(x)			((unsigned long)(x) >> PAGE_SHIFT)
127 #define	ptoa(x)			((unsigned long)(x) << PAGE_SHIFT)
128 
129 #define	arm64_btop(x)		((unsigned long)(x) >> PAGE_SHIFT)
130 #define	arm64_ptob(x)		((unsigned long)(x) << PAGE_SHIFT)
131 
132 #define	pgtok(x)		((unsigned long)(x) * (PAGE_SIZE / 1024))
133 
134 #endif /* !_MACHINE_PARAM_H_ */
135