1 /* $NetBSD: param.h,v 1.24 2021/05/31 14:38:55 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 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 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah $Hdr: machparam.h 1.16 92/12/20$ 37 * 38 * @(#)param.h 8.1 (Berkeley) 6/10/93 39 */ 40 41 #ifndef _M68K_PARAM_H_ 42 #define _M68K_PARAM_H_ 43 44 #ifdef _KERNEL_OPT 45 #include "opt_param.h" 46 #endif 47 48 /* 49 * Machine independent constants for m68k 50 */ 51 #ifndef MACHINE_ARCH 52 #define _MACHINE_ARCH m68k 53 #define MACHINE_ARCH "m68k" 54 #endif 55 #ifndef MID_MACHINE 56 #define MID_MACHINE MID_M68K 57 #endif 58 #ifndef _KERNEL 59 #undef MACHINE 60 #define MACHINE "m68k" 61 #endif 62 63 #define NBPG (1 << PGSHIFT) /* bytes/page */ 64 #define PGOFSET (NBPG-1) /* byte offset into page */ 65 66 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 67 68 #define SSIZE 1 /* initial stack size/NBPG */ 69 #define SINCR 1 /* increment of stack/NBPG */ 70 71 #define USPACE (UPAGES * NBPG) 72 73 #ifndef MSGBUFSIZE 74 #define MSGBUFSIZE NBPG /* default message buffer size */ 75 #endif 76 77 /* 78 * Constants related to network buffer management. 79 * MCLBYTES must be no larger than NBPG (the software page size), and, 80 * on machines that exchange pages of input or output buffers with mbuf 81 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 82 * of the hardware page size. 83 */ 84 #define MSIZE 256 /* size of an mbuf */ 85 86 #ifndef MCLSHIFT 87 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 88 /* 2K cluster can hold Ether frame */ 89 #endif /* MCLSHIFT */ 90 91 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 92 93 /* 94 * Mach-derived conversion macros 95 */ 96 #define m68k_round_page(x) ((((vaddr_t)(x)) + PGOFSET) & ~PGOFSET) 97 #define m68k_trunc_page(x) ((vaddr_t)(x) & ~PGOFSET) 98 #define m68k_page_offset(x) ((vaddr_t)(x) & PGOFSET) 99 #define m68k_btop(x) ((vaddr_t)(x) >> PGSHIFT) 100 #define m68k_ptob(x) ((vaddr_t)(x) << PGSHIFT) 101 102 /* Default audio blocksize in msec. See sys/dev/audio/audio.c */ 103 #if defined(_KERNEL) 104 #define __AUDIO_BLK_MS (40) 105 #endif 106 107 #endif /* !_M68K_PARAM_H_ */ 108