/* $OpenBSD: param.h,v 1.25 2004/08/06 22:31:30 mickey Exp $ */ /* $NetBSD: param.h,v 1.30 2000/06/09 16:03:04 thorpej Exp $ */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1992, 1993 * 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 and Ralph Campbell. * * 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 $Hdr: machparam.h 1.11 89/08/14$ * * @(#)param.h 8.1 (Berkeley) 6/10/93 */ /* * Machine dependent constants for the Alpha. */ #define _MACHINE alpha #define MACHINE "alpha" #define _MACHINE_ARCH alpha #define MACHINE_ARCH "alpha" #define MID_MACHINE MID_ALPHA #include #include /* * Round p (pointer or byte index) up to a correctly-aligned value for all * data types (int, long, ...). The result is u_long 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 7 #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES) #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) #define NBPG (1 << ALPHA_PGSHIFT) /* bytes/page */ #define PGOFSET (NBPG-1) /* byte off. into pg */ #define PGSHIFT ALPHA_PGSHIFT /* LOG2(NBPG) */ #define PAGE_SHIFT 13 #define PAGE_SIZE (1 << PAGE_SHIFT) #define PAGE_MASK (PAGE_SIZE - 1) #define KERNBASE 0xfffffc0000230000 /* start of kernel virtual */ #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) #define DEV_BSIZE 512 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ #define BLKDEV_IOSIZE 2048 #ifndef MAXPHYS #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ #endif #define SSIZE 1 /* initial stack size/NBPG */ #define SINCR 1 /* increment of stack/NBPG */ #define UPAGES 2 /* pages of u-area */ #define USPACE (UPAGES * NBPG) /* total size of u-area */ #define USPACE_ALIGN (0) /* u-area alignment 0-none */ #ifndef MSGBUFSIZE #define MSGBUFSIZE NBPG /* 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. */ #define MSIZE 256 /* size of an mbuf */ #ifndef MCLSHIFT #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ /* 2K cluster can hold Ether frame */ #endif /* MCLSHIFT */ #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ #define MCLOFSET (MCLBYTES - 1) #define NMBCLUSTERS 4096 /* map size, max cluster allocation */ /* * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized * logical pages. */ #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) /* pages ("clicks") to disk blocks */ #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) /* pages to bytes */ #define ctob(x) ((x) << PGSHIFT) #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) /* bytes to disk blocks */ #define btodb(x) ((x) >> DEV_BSHIFT) #define dbtob(x) ((x) << DEV_BSHIFT) /* * Map a ``block device block'' to a file system block. * This should be device dependent, and should use the bsize * field from the disk label. * For now though just use DEV_BSIZE. */ #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) /* * Mach derived conversion macros */ #define alpha_round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1)) #define alpha_trunc_page(x) ((unsigned long)(x) & ~(NBPG-1)) #define alpha_btop(x) ((unsigned long)(x) >> PGSHIFT) #define alpha_ptob(x) ((unsigned long)(x) << PGSHIFT) #ifdef _KERNEL #ifndef _LOCORE #include void delay(unsigned long); #define DELAY(n) delay(n) /* XXX THE FOLLOWING PROTOTYPE BELONGS IN INTR.H */ int spl0(void); /* drop ipl to zero */ /* XXX END INTR.H */ /* XXX THE FOLLOWING PROTOTYPE SHOULD BE A BUS.H INTERFACE */ paddr_t alpha_XXX_dmamap(vaddr_t); /* XXX END BUS.H */ #endif #endif /* !_KERNEL */