/* $OpenBSD: param.h,v 1.12 2000/04/26 03:08:42 bjc Exp $ */ /* $NetBSD: param.h,v 1.39 1999/10/22 21:14:34 ragge Exp $ */ /*- * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)param.h 5.8 (Berkeley) 6/28/91 */ #ifndef _VAX_PARAM_H_ #define _VAX_PARAM_H_ /* * Machine dependent constants for VAX. */ #define _MACHINE vax #define MACHINE "vax" #define _MACHINE_ARCH vax #define MACHINE_ARCH "vax" #define MID_MACHINE MID_VAX /* * Round p (pointer or byte index) up to a correctly-aligned value * for all data types (int, long, ...). The result is u_int and * must be cast to any desired pointer type. * * ALIGNED_POINTER is a boolean macro that checks whether an address * is valid to fetch data elements of type t from on this architecture. * This does not reflect the optimal alignment, just the possibility * (within reasonable limits). * */ #define ALIGNBYTES (sizeof(int) - 1) #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) #define PGSHIFT 12 /* LOG2(NBPG) */ #define NBPG (1 << PGSHIFT) /* (1 << PGSHIFT) bytes/page */ #define PGOFSET (NBPG - 1) /* byte offset into page */ #define VAX_PGSHIFT 9 #define VAX_NBPG (1 << VAX_PGSHIFT) #define VAX_PGOFSET (VAX_NBPG - 1) #define KERNBASE 0x80000000 /* start of kernel virtual */ #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ #define DEV_BSIZE (1 << DEV_BSHIFT) #define BLKDEV_IOSIZE 2048 #define MAXPHYS (63 * 1024) /* max raw I/O transfer size */ #define MAXBSIZE 0x4000 /* max FS block size - XXX */ #define CLSIZELOG2 0 #define CLSIZE 1 #define UPAGES 2 /* pages of u-area */ #define USPACE (NBPG*UPAGES) #define REDZONEADDR (VAX_NBPG*3) /* Must be > sizeof(struct user) */ #ifndef MSGBUFSIZE #define MSGBUFSIZE 8192 /* default message buffer size */ #endif /* * Constants related to network buffer management. * MCLBYTES must be no larger than NBPG (the software page size), and, * on machines that exchange pages of input or output buffers with mbuf * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple * of the hardware page size. */ #ifndef MSIZE #define MSIZE 128 /* size of an mbuf */ #endif /* MSIZE */ #ifndef MCLSHIFT #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ #endif /* MCLSHIFT */ #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ #ifndef NMBCLUSTERS #ifdef GATEWAY #define NMBCLUSTERS 512 /* map size, max cluster allocation */ #else #define NMBCLUSTERS 256 /* map size, max cluster allocation */ #endif /* GATEWAY */ #endif /* NMBCLUSTERS */ /* * Size of kernel malloc arena in NBPG-sized logical pages */ #ifndef NKMEMCLUSTERS #define NKMEMCLUSTERS (4096*1024/NBPG) #endif /* * Some macros for units conversion */ /* pages ("clicks") to disk blocks */ #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) /* clicks to bytes */ #define ctob(x) ((x) << PGSHIFT) #define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT) #define btop(x) (((unsigned)(x)) >> PGSHIFT) /* bytes to disk blocks */ #define btodb(x) ((x) >> DEV_BSHIFT) #define dbtob(x) ((x) << DEV_BSHIFT) /* MD conversion macros */ #define vax_btoc(x) (((unsigned)(x) + VAX_PGOFSET) >> VAX_PGSHIFT) #define vax_btop(x) (((unsigned)(x)) >> VAX_PGSHIFT) /* * Map a ``block device block'' to a file system block. * This should be device dependent, and will be if we * add an entry to cdevsw/bdevsw for that purpose. * For now though just use DEV_BSIZE. */ #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) #define ovbcopy(x,y,z) bcopy(x, y, z) #ifdef _KERNEL #define pmap_pageable(a,b,c,d) /* Dont do anything */ #ifndef lint #define splx(reg) \ ({ \ register int val; \ __asm __volatile ("mfpr $0x12,%0;mtpr %1,$0x12" \ : "=&g" (val) \ : "g" (reg)); \ val; \ }) #define _splraise(reg) \ ({ \ register int val; \ __asm __volatile ("mfpr $0x12,%0" \ : "=&g" (val) \ : ); \ if ((reg) > val) { \ __asm __volatile ("mtpr %0,$0x12" \ : \ : "g" (reg)); \ } \ val; \ }) #endif #define spl0() splx(0) /* IPL0 */ #define spllowersoftclock() splx(8) /* IPL08 */ #define splsoftclock() _splraise(8) /* IPL08 */ #define splsoftnet() _splraise(0xc) /* IPL0C */ #define splddb() _splraise(0xf) /* IPL0F */ #define splbio() _splraise(0x15) /* IPL15 */ #define splnet() _splraise(0x15) /* IPL15 */ #define spltty() _splraise(0x15) /* IPL15 */ #define splimp() _splraise(0x17) /* IPL17 */ #define splclock() _splraise(0x18) /* IPL18 */ #define splhigh() _splraise(0x1f) /* IPL1F */ #define splstatclock() splclock() /* These are better to use when playing with VAX buses */ #define spl4() splx(0x14) #define spl5() splx(0x15) #define spl6() splx(0x16) #define spl7() splx(0x17) #define vmapbuf(p,q) #define vunmapbuf(p,q) /* Prototype needed for delay() */ #ifndef _LOCORE void delay __P((int)); /* inline macros used inside kernel */ #include #endif #define DELAY(x) delay(x) #endif /* _KERNEL */ #endif /* _VAX_PARAM_H_ */