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 RISC-V.
38 */
39
40#include <machine/_align.h>
41
42#define	STACKALIGNBYTES	(16 - 1)
43#define	STACKALIGN(p)	((uint64_t)(p) & ~STACKALIGNBYTES)
44
45#ifndef MACHINE
46#define	MACHINE		"riscv"
47#endif
48#ifndef MACHINE_ARCH
49#define	MACHINE_ARCH	"riscv64"
50#endif
51
52#if defined(SMP) || defined(KLD_MODULE)
53#ifndef MAXCPU
54#define	MAXCPU		16
55#endif
56#else
57#define	MAXCPU		1
58#endif /* SMP || KLD_MODULE */
59
60#ifndef MAXMEMDOM
61#define	MAXMEMDOM	1
62#endif
63
64#define	ALIGNBYTES	_ALIGNBYTES
65#define	ALIGN(p)	_ALIGN(p)
66/*
67 * ALIGNED_POINTER is a boolean macro that checks whether an address
68 * is valid to fetch data elements of type t from on this architecture.
69 * This does not reflect the optimal alignment, just the possibility
70 * (within reasonable limits).
71 */
72#define	ALIGNED_POINTER(p, t)	((((u_long)(p)) & (sizeof(t) - 1)) == 0)
73
74/*
75 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
76 * architecture.  It should be used with appropriate caution.
77 */
78#define	CACHE_LINE_SHIFT	6
79#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
80
81#define	PAGE_SHIFT	12
82#define	PAGE_SIZE	(1 << PAGE_SHIFT)	/* Page size */
83#define	PAGE_MASK	(PAGE_SIZE - 1)
84
85#define	MAXPAGESIZES	1		/* maximum number of supported page sizes */
86
87#ifndef KSTACK_PAGES
88#define	KSTACK_PAGES	4	/* pages of kernel stack (with pcb) */
89#endif
90
91#define	KSTACK_GUARD_PAGES	1	/* pages of kstack guard; 0 disables */
92#define	PCPU_PAGES		1
93
94/*
95 * Mach derived conversion macros
96 */
97#define	round_page(x)		(((unsigned long)(x) + PAGE_MASK) & ~PAGE_MASK)
98#define	trunc_page(x)		((unsigned long)(x) & ~PAGE_MASK)
99
100#define	atop(x)			((unsigned long)(x) >> PAGE_SHIFT)
101#define	ptoa(x)			((unsigned long)(x) << PAGE_SHIFT)
102
103#define	riscv_btop(x)		((unsigned long)(x) >> PAGE_SHIFT)
104#define	riscv_ptob(x)		((unsigned long)(x) << PAGE_SHIFT)
105
106#define	pgtok(x)		((unsigned long)(x) * (PAGE_SIZE / 1024))
107
108#endif /* !_MACHINE_PARAM_H_ */
109