1 /* $NetBSD: param.h,v 1.25 2020/05/01 08:21:27 isaki Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. All rights reserved. 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * William Jolitz. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)param.h 5.8 (Berkeley) 6/28/91 36 */ 37 38 /* 39 * SuperH dependent constants. 40 */ 41 42 #ifndef _SH3_PARAM_H_ 43 #define _SH3_PARAM_H_ 44 45 #if defined(_KERNEL) && !defined(_LOCORE) 46 #include <machine/cpu.h> 47 #endif 48 49 /* NetBSD/sh3 is 4KB page */ 50 #define PGSHIFT 12 51 #define NBPG (1 << PGSHIFT) 52 #define PGOFSET (NBPG - 1) 53 54 /* 55 * u-space. 56 */ 57 #define UPAGES 3 /* pages of u-area */ 58 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 59 #if UPAGES == 1 60 #error "too small u-area" 61 #elif UPAGES == 2 62 #define P1_STACK /* kernel stack is P1-area */ 63 #else 64 #undef P1_STACK /* kernel stack is P3-area */ 65 #endif 66 67 #ifndef MSGBUFSIZE 68 #define MSGBUFSIZE NBPG /* default message buffer size */ 69 #endif 70 71 /* 72 * Constants related to network buffer management. 73 * MCLBYTES must be no larger than NBPG (the software page size), and, 74 * on machines that exchange pages of input or output buffers with mbuf 75 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 76 * of the hardware page size. 77 */ 78 #define MSIZE 256 /* size of an mbuf */ 79 80 #ifndef MCLSHIFT 81 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 82 /* 2K cluster can hold Ether frame */ 83 #endif /* MCLSHIFT */ 84 85 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 86 87 /* 88 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 89 * logical pages. 90 */ 91 #define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 92 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 93 94 /* Default audio blocksize in msec. See sys/dev/audio/audio.c */ 95 #if defined(_KERNEL) 96 #define __AUDIO_BLK_MS (40) 97 #endif 98 99 #endif /* !_SH3_PARAM_H_ */ 100