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
30#ifndef _MACHINE_PARAM_H_
31#define	_MACHINE_PARAM_H_
32
33/*
34 * Machine dependent constants for RISC-V.
35 */
36
37#include <machine/_align.h>
38
39#define	STACKALIGNBYTES	(16 - 1)
40#define	STACKALIGN(p)	((uint64_t)(p) & ~STACKALIGNBYTES)
41
42#define __PCI_REROUTE_INTERRUPT
43
44#ifndef MACHINE
45#define	MACHINE		"riscv"
46#endif
47#ifndef MACHINE_ARCH
48#define	MACHINE_ARCH	"riscv64"
49#endif
50
51#ifdef SMP
52#ifndef MAXCPU
53#define	MAXCPU		16
54#endif
55#else
56#define	MAXCPU		1
57#endif
58
59#ifndef MAXMEMDOM
60#define	MAXMEMDOM	1
61#endif
62
63#define	ALIGNBYTES	_ALIGNBYTES
64#define	ALIGN(p)	_ALIGN(p)
65/*
66 * ALIGNED_POINTER is a boolean macro that checks whether an address
67 * is valid to fetch data elements of type t from on this architecture.
68 * This does not reflect the optimal alignment, just the possibility
69 * (within reasonable limits).
70 */
71#define	ALIGNED_POINTER(p, t)	((((u_long)(p)) & (sizeof(t) - 1)) == 0)
72
73/*
74 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
75 * architecture.  It should be used with appropriate caution.
76 */
77#define	CACHE_LINE_SHIFT	6
78#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
79
80#define	PAGE_SHIFT	12
81#define	PAGE_SIZE	(1 << PAGE_SHIFT)	/* Page size */
82#define	PAGE_MASK	(PAGE_SIZE - 1)
83
84#define	MAXPAGESIZES	3	/* maximum number of supported page sizes */
85
86#ifndef KSTACK_PAGES
87#define	KSTACK_PAGES	4	/* pages of kernel stack (with pcb) */
88#endif
89
90#define	KSTACK_GUARD_PAGES	1	/* pages of kstack guard; 0 disables */
91#define	PCPU_PAGES		1
92
93/*
94 * Mach derived conversion macros
95 */
96#define	round_page(x)		(((unsigned long)(x) + PAGE_MASK) & ~PAGE_MASK)
97#define	trunc_page(x)		((unsigned long)(x) & ~PAGE_MASK)
98
99#define	atop(x)			((unsigned long)(x) >> PAGE_SHIFT)
100#define	ptoa(x)			((unsigned long)(x) << PAGE_SHIFT)
101
102#define	riscv_btop(x)		((unsigned long)(x) >> PAGE_SHIFT)
103#define	riscv_ptob(x)		((unsigned long)(x) << PAGE_SHIFT)
104
105#define	pgtok(x)		((unsigned long)(x) * (PAGE_SIZE / 1024))
106
107#endif /* !_MACHINE_PARAM_H_ */
108