1/* $NetBSD: param.h,v 1.8 2023/05/07 12:41:48 skrll Exp $ */
2
3/*-
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _RISCV_PARAM_H_
33#define _RISCV_PARAM_H_
34
35#ifdef _KERNEL_OPT
36#include "opt_param.h"
37#endif
38
39/*
40 * Machine dependent constants for all OpenRISC processors
41 */
42
43/*
44 * For KERNEL code:
45 * MACHINE must be defined by the individual port. This is so that
46 * uname returns the correct thing, etc.
47 *
48 * For non-KERNEL code:
49 * If ELF, MACHINE and MACHINE_ARCH are forced to "or1k/or1k".
50 */
51
52#ifdef _LP64
53#define _MACHINE_ARCH riscv64
54#define MACHINE_ARCH "riscv64"
55#define _MACHINE_ARCH32 riscv32
56#define MACHINE_ARCH32 "riscv32"
57#else
58#define _MACHINE_ARCH riscv32
59#define MACHINE_ARCH "riscv32"
60#endif
61#define _MACHINE riscv
62#define MACHINE "riscv"
63
64#define MID_MACHINE MID_RISCV
65
66/* RISC-V specific macro to align a stack pointer (downwards). */
67#define STACK_ALIGNBYTES (16UL - 1)
68#define ALIGNBYTES32 __BIGGEST_ALIGNMENT__
69
70#define NKMEMPAGES_MIN_DEFAULT ((128UL * 1024 * 1024) >> PAGE_SHIFT)
71#define NKMEMPAGES_MAX_UNLIMITED 1
72
73#define PGSHIFT 12
74#define NBPG (1 << PGSHIFT)
75#define PGOFSET (NBPG - 1)
76
77#define UPAGES 2
78#define USPACE (UPAGES << PGSHIFT)
79#define USPACE_ALIGN NBPG
80
81/*
82 * Constants related to network buffer management.
83 * MCLBYTES must be no larger than NBPG (the software page size), and
84 * NBPG % MCLBYTES must be zero.
85 */
86#define MSIZE 512 /* size of an mbuf */
87
88#ifndef MCLSHIFT
89#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
90 /* 2K cluster can hold Ether frame */
91#endif /* MCLSHIFT */
92
93#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
94
95#ifndef MSGBUFSIZE
96#define MSGBUFSIZE 65536 /* default message buffer size */
97#endif
98
99#define MAXCPUS 32
100
101#ifdef _KERNEL
102void delay(unsigned long);
103#define DELAY(x) delay(x)
104#endif
105
106#define riscv_btop(x) ((unsigned long)(x) >> PGSHIFT)
107#define riscv_ptob(x) ((unsigned long)(x) << PGSHIFT)
108
109
110#endif /* _RISCV_PARAM_H_ */