/* $OpenBSD: param.h,v 1.20 2006/06/12 17:58:24 miod Exp $ */ /* $NetBSD: param.h,v 1.2 1997/06/10 18:21:23 veego Exp $ */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * 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. 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. * * from: Utah $Hdr: machparam.h 1.16 92/12/20$ * * @(#)param.h 8.1 (Berkeley) 6/10/93 */ #ifndef _M68K_PARAM_H_ #define _M68K_PARAM_H_ /* * Machine independent constants for m68k */ #define _MACHINE_ARCH m68k #define MACHINE_ARCH "m68k" #define MID_MACHINE MID_M68K /* * 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 PAGE_SIZE (1 << PAGE_SHIFT) #define PAGE_MASK (PAGE_SIZE - 1) #define PGSHIFT PAGE_SHIFT #define NBPG (1 << PGSHIFT) /* bytes/page */ #define PGOFSET (NBPG-1) /* byte offset into page */ #define NPTEPG (PAGE_SIZE / (sizeof(pt_entry_t))) #define BTOPKERNBASE ((u_long)KERNBASE >> PAGE_SHIFT) #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ #define DEV_BSIZE (1 << DEV_BSHIFT) #define BLKDEV_IOSIZE 2048 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ #define SEGSHIFT020 (34 - PAGE_SHIFT) #define SEGSHIFT040 (18) #ifndef SEGSHIFT #if defined(M68040) || defined(M68060) #if defined(M68020) || defined(M68030) #define SEGSHIFT ((mmutype <= MMU_68040) ? SEGSHIFT040 : SEGSHIFT020) #else #define SEGSHIFT SEGSHIFT040 #endif #else #define SEGSHIFT SEGSHIFT020 #endif #define NBSEG (1 << SEGSHIFT) #define SEGOFSET (NBSEG - 1) #endif /* mac68k use 3 pages of u-area */ #ifndef UPAGES #define UPAGES 2 /* pages of u-area */ #endif #define USPACE (UPAGES * PAGE_SIZE) #define USPACE_ALIGN (0) /* u-area alignment 0-none */ /* * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized * logical pages. */ #define NKMEMPAGES_MIN_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT) #define NKMEMPAGES_MAX_DEFAULT ((64 * 1024 * 1024) >> PAGE_SHIFT) /* * Constants related to network buffer management. * MCLBYTES must be no larger than CLBYTES (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. */ #define MSIZE 256 /* size of an mbuf */ #ifndef MCLSHIFT #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ #endif /* MCLSHIFT */ #define MCLBYTES (1 << MCLSHIFT) #define MCLOFSET (MCLBYTES - 1) #define NMBCLUSTERS 1024 /* map size, max cluster allocation */ /* pages ("clicks") to disk blocks */ #define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT)) #define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT)) /* pages to bytes */ #define ctob(x) ((x) << PAGE_SHIFT) #define btoc(x) (((x) + PAGE_MASK) >> PAGE_SHIFT) /* bytes to disk blocks */ #define btodb(x) ((x) >> DEV_BSHIFT) #define dbtob(x) ((x) << DEV_BSHIFT) /* * Mach derived conversion macros */ #define m68k_round_seg(x) ((((unsigned)(x)) + SEGOFSET) & ~SEGOFSET) #define m68k_trunc_seg(x) ((unsigned)(x) & ~SEGOFSET) #define m68k_page_offset(x) ((unsigned)(x) & PGOFSET) #ifdef COMPAT_HPUX /* * Constants/macros for HPUX multiple mapping of user address space. * Pages in the first 256Mb are mapped in at every 256Mb segment. */ #define HPMMMASK 0xF0000000 #define ISHPMMADDR(p, v) \ (((p)->p_md.md_flags & MDP_HPUXMMAP) && \ ((unsigned)(v) & HPMMMASK) && \ ((unsigned)(v) & HPMMMASK) != HPMMMASK) #define HPMMBASEADDR(v) \ ((unsigned)(v) & ~HPMMMASK) #endif /* COMPAT_HPUX */ #include <machine/intr.h> /* splXXX() */ #endif /* !_M68K_PARAM_H_ */