1 /* $NetBSD: param.h,v 1.26 2021/05/31 14:38:55 simonb 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 #ifdef _KERNEL_OPT 49 #include "opt_param.h" 50 #endif 51 52 /* NetBSD/sh3 is 4KB page */ 53 #define PGSHIFT 12 54 #define NBPG (1 << PGSHIFT) 55 #define PGOFSET (NBPG - 1) 56 57 /* 58 * u-space. 59 */ 60 #define UPAGES 3 /* pages of u-area */ 61 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 62 #if UPAGES == 1 63 #error "too small u-area" 64 #elif UPAGES == 2 65 #define P1_STACK /* kernel stack is P1-area */ 66 #else 67 #undef P1_STACK /* kernel stack is P3-area */ 68 #endif 69 70 #ifndef MSGBUFSIZE 71 #define MSGBUFSIZE NBPG /* default message buffer size */ 72 #endif 73 74 /* 75 * Constants related to network buffer management. 76 * MCLBYTES must be no larger than NBPG (the software page size), and, 77 * on machines that exchange pages of input or output buffers with mbuf 78 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 79 * of the hardware page size. 80 */ 81 #define MSIZE 256 /* size of an mbuf */ 82 83 #ifndef MCLSHIFT 84 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 85 /* 2K cluster can hold Ether frame */ 86 #endif /* MCLSHIFT */ 87 88 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 89 90 /* 91 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 92 * logical pages. 93 */ 94 #define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 95 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 96 97 /* Default audio blocksize in msec. See sys/dev/audio/audio.c */ 98 #if defined(_KERNEL) 99 #define __AUDIO_BLK_MS (40) 100 #endif 101 102 #endif /* !_SH3_PARAM_H_ */ 103