1 /* $NetBSD: param.h,v 1.45 2019/01/07 22:00:30 jdolecek 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 /* 42 * Machine dependent constants for the Alpha. 43 */ 44 #define _MACHINE alpha 45 #define MACHINE "alpha" 46 #define _MACHINE_ARCH alpha 47 #define MACHINE_ARCH "alpha" 48 #define MID_MACHINE MID_ALPHA 49 50 #ifdef _KERNEL 51 #include <machine/cpu.h> 52 #else 53 #define ALPHA_PGSHIFT 13 54 #endif 55 56 #define NBPG (1 << ALPHA_PGSHIFT) /* bytes/page */ 57 #define PGOFSET (NBPG-1) /* byte off. into pg */ 58 #define PGSHIFT ALPHA_PGSHIFT /* LOG2(NBPG) */ 59 60 #define KERNBASE 0xfffffc0000a00000 /* start of kernel virtual */ 61 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 62 63 #define SSIZE 1 /* initial stack size/NBPG */ 64 #define SINCR 1 /* increment of stack/NBPG */ 65 66 #define UPAGES 2 /* pages of u-area */ 67 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 68 69 #ifndef MSGBUFSIZE 70 #define MSGBUFSIZE NBPG /* default message buffer size */ 71 #endif 72 73 /* 74 * Constants related to network buffer management. 75 * MCLBYTES must be no larger than NBPG (the software page size), and, 76 * on machines that exchange pages of input or output buffers with mbuf 77 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 78 * of the hardware page size. 79 */ 80 #define MSIZE 256 /* size of an mbuf */ 81 82 #ifndef MCLSHIFT 83 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 84 /* 2K cluster can hold Ether frame */ 85 #endif /* MCLSHIFT */ 86 87 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 88 89 /* 90 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 91 * logical pages. 92 * No enforced maximum on alpha 93 */ 94 #define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 95 #define NKMEMPAGES_MAX_UNLIMITED 1 96 97 /* 98 * Mach derived conversion macros 99 */ 100 #define alpha_round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1)) 101 #define alpha_trunc_page(x) ((unsigned long)(x) & ~(NBPG-1)) 102 #define alpha_btop(x) ((unsigned long)(x) >> PGSHIFT) 103 #define alpha_ptob(x) ((unsigned long)(x) << PGSHIFT) 104 105 #ifdef _KERNEL 106 #ifndef _LOCORE 107 108 #include <machine/intr.h> 109 110 void delay(unsigned long); 111 #define DELAY(n) delay(n) 112 113 /* XXX THE FOLLOWING PROTOTYPE SHOULD BE A BUS.H INTERFACE */ 114 paddr_t alpha_XXX_dmamap(vaddr_t); 115 /* XXX END BUS.H */ 116 117 #endif 118 #endif /* !_KERNEL */ 119