home *** CD-ROM | disk | FTP | other *** search
- /*-
- * 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
- */
-
- /*
- * Machine dependent constants for Intel 386.
- */
-
- #define MACHINE "i386"
-
- /*
- * 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.
- */
- #define ALIGN(p) (((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1))
-
- #define NBPG 4096 /* bytes/page */
- #define PGOFSET (NBPG-1) /* byte offset into page */
- #define PGSHIFT 12 /* LOG2(NBPG) */
- #define NPTEPG (NBPG/(sizeof (struct pte)))
-
- #define NBPDR (1024*NBPG) /* bytes/page dir */
- #define PDROFSET (NBPDR-1) /* byte offset into page dir */
- #define PDRSHIFT 22 /* LOG2(NBPDR) */
-
- #define KERNBASE 0xFE000000 /* 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
- #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
-
- #define CLSIZE 1
- #define CLSIZELOG2 0
-
- /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
- #define SSIZE 1 /* initial stack size/NBPG */
- #define SINCR 1 /* increment of stack/NBPG */
-
- #define UPAGES 2 /* pages of u-area */
-
- /*
- * 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 128 /* size of an mbuf */
- #define MCLBYTES 1024
- #define MCLSHIFT 10
- #define MCLOFSET (MCLBYTES - 1)
- #ifndef NMBCLUSTERS
- #ifdef GATEWAY
- #define NMBCLUSTERS 512 /* map size, max cluster allocation */
- #else
- #define NMBCLUSTERS 256 /* map size, max cluster allocation */
- #endif
- #endif
-
- /*
- * Size of kernel malloc arena in CLBYTES-sized logical pages
- */
- #ifndef NKMEMCLUSTERS
- #define NKMEMCLUSTERS (2048*1024/CLBYTES)
- #endif
- /*
- * Some macros for units conversion
- */
- /* Core clicks (4096 bytes) to segments and vice versa */
- #define ctos(x) (x)
- #define stoc(x) (x)
-
- /* Core clicks (4096 bytes) to disk blocks */
- #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
- #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
- #define dtob(x) ((x)<<DEV_BSHIFT)
-
- /* clicks to bytes */
- #define ctob(x) ((x)<<PGSHIFT)
-
- /* bytes to clicks */
- #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
-
- #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
- ((unsigned)(bytes) >> DEV_BSHIFT)
- #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
- ((unsigned)(db) << DEV_BSHIFT)
-
- /*
- * 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))
-
- /*
- * Mach derived conversion macros
- */
- #define i386_round_pdr(x) ((((unsigned)(x)) + NBPDR - 1) & ~(NBPDR-1))
- #define i386_trunc_pdr(x) ((unsigned)(x) & ~(NBPDR-1))
- #define i386_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
- #define i386_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
- #define i386_btod(x) ((unsigned)(x) >> PDRSHIFT)
- #define i386_dtob(x) ((unsigned)(x) << PDRSHIFT)
- #define i386_btop(x) ((unsigned)(x) >> PGSHIFT)
- #define i386_ptob(x) ((unsigned)(x) << PGSHIFT)
-
- #ifdef KERNEL
- #ifndef LOCORE
- int cpuspeed;
- #endif
- #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); }
-
- #else
- #define DELAY(n) { register int N = (n); while (--N > 0); }
- #endif
-