+/*-
+ * 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)
+
+#ifndef KERNEL
+#define DELAY(n) { volatile int N = (n); while (--N > 0); }
+#endif
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