initial import of NetBSD tree

1 files changed, 146 insertions, 0 deletions

diff --git a/sys/arch/i386/include/param.h b/sys/arch/i386/include/param.h
new file mode 100644
index 00000000000..9ac9966cc95
--- /dev/null
+++ b/sys/arch/i386/include/param.h
@@ -0,0 +1,146 @@
+/*	$NetBSD: param.h,v 1.26 1995/06/26 06:55:58 cgd 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
+ */
+
+/*
+ * Machine dependent constants for Intel 386.
+ */
+
+#ifdef _KERNEL
+#ifdef LOCORE
+#include <machine/psl.h>
+#else
+#include <machine/cpu.h>
+#endif
+#endif
+
+#define MACHINE		"i386"
+#define MACHINE_ARCH	"i386"
+#define MID_MACHINE	MID_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 ALIGNBYTES	(sizeof(int) - 1)
+#define ALIGN(p)	(((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
+
+#define	PGSHIFT		12		/* LOG2(NBPG) */
+#define	NBPG		(1 << PGSHIFT)	/* bytes/page */
+#define	PGOFSET		(NBPG-1)	/* byte offset into page */
+#define	NPTEPG		(NBPG/(sizeof (pt_entry_t)))
+
+#define	KERNBASE	0xf8000000	/* start of kernel virtual space */
+#define	KERNSIZE	0x01800000	/* size of kernel virtual space */
+#define	KERNTEXTOFF	0xf8100000	/* start of kernel text */
+#define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
+
+#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	CLSIZELOG2	0
+#define	CLSIZE		(1 << CLSIZELOG2)
+
+/* 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 */
+#define	USPACE		(UPAGES * NBPG)	/* total size 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	MCLSHIFT	11		/* convert bytes to m_buf clusters */
+#define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
+#define	MCLOFSET	(MCLBYTES - 1)	/* offset within a 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
+#endif
+
+/*
+ * Size of kernel malloc arena in CLBYTES-sized logical pages
+ */ 
+#ifndef NKMEMCLUSTERS
+#define	NKMEMCLUSTERS	(6 * 1024 * 1024 / CLBYTES)
+#endif
+
+/* pages ("clicks") to disk blocks */
+#define	ctod(x)		((x) << (PGSHIFT - DEV_BSHIFT))
+#define	dtoc(x)		((x) >> (PGSHIFT - DEV_BSHIFT))
+
+/* bytes to pages */
+#define	ctob(x)		((x) << PGSHIFT)
+#define	btoc(x)		(((x) + PGOFSET) >> PGSHIFT)
+
+/* bytes to disk blocks */
+#define	dbtob(x)	((x) << DEV_BSHIFT)
+#define	btodb(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	i386_round_pdr(x)	((((unsigned)(x)) + PDOFSET) & ~PDOFSET)
+#define	i386_trunc_pdr(x)	((unsigned)(x) & ~PDOFSET)
+#define	i386_btod(x)		((unsigned)(x) >> PDSHIFT)
+#define	i386_dtob(x)		((unsigned)(x) << PDSHIFT)
+#define	i386_round_page(x)	((((unsigned)(x)) + PGOFSET) & ~PGOFSET)
+#define	i386_trunc_page(x)	((unsigned)(x) & ~PGOFSET)
+#define	i386_btop(x)		((unsigned)(x) >> PGSHIFT)
+#define	i386_ptob(x)		((unsigned)(x) << PGSHIFT)