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#ifndef MACHINE
43#define MACHINE "riscv"
44#endif
45#ifndef MACHINE_ARCH
46#define MACHINE_ARCH "riscv64"
47#endif
48
49#ifdef SMP
50#ifndef MAXCPU
51#define MAXCPU 16
52#endif
53#else
54#define MAXCPU 1
55#endif
56
57#ifndef MAXMEMDOM
58#define MAXMEMDOM 1
59#endif
60
61#define ALIGNBYTES _ALIGNBYTES
62#define ALIGN(p) _ALIGN(p)
63/*
64 * ALIGNED_POINTER is a boolean macro that checks whether an address
65 * is valid to fetch data elements of type t from on this architecture.
66 * This does not reflect the optimal alignment, just the possibility
67 * (within reasonable limits).
68 */
69#define ALIGNED_POINTER(p, t) ((((u_long)(p)) & (sizeof(t) - 1)) == 0)
70
71/*
72 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
73 * architecture. It should be used with appropriate caution.
74 */
75#define CACHE_LINE_SHIFT 6
76#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT)
77
78#define PAGE_SHIFT 12
79#define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */
80#define PAGE_MASK (PAGE_SIZE - 1)
81
82#define MAXPAGESIZES 3 /* maximum number of supported page sizes */
83
84#ifndef KSTACK_PAGES
85#define KSTACK_PAGES 4 /* pages of kernel stack (with pcb) */
86#endif
87
88#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */
89#define PCPU_PAGES 1
90
91/*
92 * Mach derived conversion macros
93 */
94#define riscv_btop(x) ((unsigned long)(x) >> PAGE_SHIFT)
95#define riscv_ptob(x) ((unsigned long)(x) << PAGE_SHIFT)
96
97#endif /* !_MACHINE_PARAM_H_ */