1/* $NetBSD: param.h,v 1.34 2021/05/31 14:38:56 simonb Exp $ */
2
3/*-
4 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * All rights reserved.
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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#ifndef _POWERPC_PARAM_H
35#define _POWERPC_PARAM_H
36
37#ifdef _KERNEL_OPT
38#include "opt_param.h"
39#include "opt_ppcarch.h"
40#endif
41
42/*
43 * Machine dependent constants for PowerPC
44 * For userland regardless of port, force MACHINE to be "powerpc"
45 */
46#ifndef _KERNEL
47#undef MACHINE
48#endif
49
50#ifdef _LP64
51# ifndef MACHINE
52# define MACHINE "powerpc64"
53# endif
54# define MACHINE_ARCH "powerpc64"
55# define MID_MACHINE MID_POWERPC64
56#else
57# ifndef MACHINE
58# define MACHINE "powerpc"
59# endif
60# define MACHINE_ARCH "powerpc"
61# define MID_MACHINE MID_POWERPC
62#endif
63
64/* PowerPC-specific macro to align a stack pointer (downwards). */
65#define STACK_ALIGNBYTES (16 - 1) /* AltiVec */
66
67#ifdef PPC_IBM4XX
68#define PGSHIFT 14 /* Use 16KB to reduce TLB thrashing */
69#define UPAGES 1
70#else
71#define PGSHIFT 12
72#define UPAGES 4
73#endif
74#define NBPG (1 << PGSHIFT) /* Page size */
75#define PGOFSET (NBPG - 1)
76
77#define BLKDEV_IOSIZE NBPG
78
79#define USPACE (UPAGES * NBPG)
80
81#ifndef MSGBUFSIZE
82#define MSGBUFSIZE (2*NBPG) /* default message buffer size */
83#endif
84
85#ifndef KERNBASE
86#define KERNBASE 0x100000
87#endif
88
89/*
90 * Constants related to network buffer management.
91 * MCLBYTES must be no larger than NBPG (the software page size), and,
92 * on machines that exchange pages of input or output buffers with mbuf
93 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
94 * of the hardware page size.
95 */
96#ifndef MSIZE
97#ifdef _LP64
98#define MSIZE 512 /* size of an mbuf */
99#else /* _LP64 */
100#define MSIZE 256 /* size of an mbuf */
101#endif /* _LP64 */
102#endif
103#ifndef MCLSHIFT
104#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
105#endif
106#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
107
108/*
109 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
110 * logical pages.
111 */
112#ifndef NKMEMPAGES_MIN_DEFAULT
113#define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT)
114#endif
115#ifndef NKMEMPAGES_MAX_DEFAULT
116#define NKMEMPAGES_MAX_DEFAULT ((256 * 1024 * 1024) >> PAGE_SHIFT)
117#endif
118
119#if defined(_KERNEL) && !defined(_LOCORE)
120#include <machine/cpu.h>
121#endif /* _KERNEL && !_LOCORE */
122
123#endif /* _POWERPC_PARAM_H_ */