1 /* $NetBSD: param.h,v 1.50 2021/07/19 10:28:58 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. 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 and Ralph Campbell. 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 $Hdr: machparam.h 1.11 89/08/14$ 37 * 38 * @(#)param.h 8.1 (Berkeley) 6/10/93 39 */ 40 41 #ifdef _KERNEL_OPT 42 #include "opt_param.h" 43 #endif 44 45 /* 46 * Machine dependent constants for the Alpha. 47 */ 48 #define _MACHINE alpha 49 #define MACHINE "alpha" 50 #define _MACHINE_ARCH alpha 51 #define MACHINE_ARCH "alpha" 52 #define MID_MACHINE MID_ALPHA 53 54 #ifdef _KERNEL 55 #include <machine/cpu.h> 56 #else 57 #define ALPHA_PGSHIFT 13 58 #endif 59 60 /* 61 * Compiler assumes 16 byte stack alignment, per recommendation of 62 * Alpha Architecture Handbook. 63 */ 64 #define STACK_ALIGNBYTES (16 - 1) 65 66 #define NBPG (1 << ALPHA_PGSHIFT) /* bytes/page */ 67 #define PGOFSET (NBPG-1) /* byte off. into pg */ 68 #define PGSHIFT ALPHA_PGSHIFT /* LOG2(NBPG) */ 69 70 #define KERNBASE 0xfffffc0000a00000 /* start of kernel virtual */ 71 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 72 73 #define SSIZE 1 /* initial stack size/NBPG */ 74 #define SINCR 1 /* increment of stack/NBPG */ 75 76 #define UPAGES 2 /* pages of u-area */ 77 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 78 79 #ifndef MSGBUFSIZE 80 #define MSGBUFSIZE NBPG /* default message buffer size */ 81 #endif 82 83 /* 84 * EV4 (21064) and EV5 (21164) have a 32-byte cache line size. 85 * EV6 (21264) and EV7 (21364) have a 64-byte cache line size. 86 */ 87 88 /* 89 * Constants related to network buffer management. 90 * MCLBYTES must be no larger than NBPG (the software page size), and, 91 * on machines that exchange pages of input or output buffers with mbuf 92 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 93 * of the hardware page size. 94 */ 95 #define MSIZE 256 /* size of an mbuf */ 96 97 #ifndef MCLSHIFT 98 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 99 /* 2K cluster can hold Ether frame */ 100 #endif /* MCLSHIFT */ 101 102 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 103 104 /* 105 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 106 * logical pages. 107 * No enforced maximum on alpha 108 */ 109 #define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 110 #define NKMEMPAGES_MAX_UNLIMITED 1 111 112 /* 113 * Mach derived conversion macros 114 */ 115 #define alpha_round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1)) 116 #define alpha_trunc_page(x) ((unsigned long)(x) & ~(NBPG-1)) 117 #define alpha_btop(x) ((unsigned long)(x) >> PGSHIFT) 118 #define alpha_ptob(x) ((unsigned long)(x) << PGSHIFT) 119 120 #ifdef _KERNEL 121 #ifndef _LOCORE 122 123 #include <machine/intr.h> 124 125 void delay(unsigned long); 126 #define DELAY(n) delay(n) 127 128 #endif 129 #endif /* !_KERNEL */ 130