BSD 4.4 Lite Kernel Sources

1 files changed, 159 insertions, 0 deletions

diff --git a/sys/vm/vm_param.h b/sys/vm/vm_param.h
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+/* 
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * The Mach Operating System project at Carnegie-Mellon University.
+ *
+ * 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.
+ *
+ *	@(#)vm_param.h	8.1 (Berkeley) 6/11/93
+ *
+ *
+ * Copyright (c) 1987, 1990 Carnegie-Mellon University.
+ * All rights reserved.
+ *
+ * Authors: Avadis Tevanian, Jr., Michael Wayne Young
+ * 
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+
+/*
+ *	Machine independent virtual memory parameters.
+ */
+
+#ifndef	_VM_PARAM_
+#define	_VM_PARAM_
+
+#include <machine/vmparam.h>
+
+/*
+ * This belongs in types.h, but breaks too many existing programs.
+ */
+typedef int	boolean_t;
+#define	TRUE	1
+#define	FALSE	0
+
+/*
+ *	The machine independent pages are refered to as PAGES.  A page
+ *	is some number of hardware pages, depending on the target machine.
+ */
+#define DEFAULT_PAGE_SIZE	4096
+
+/*
+ *	All references to the size of a page should be done with PAGE_SIZE
+ *	or PAGE_SHIFT.  The fact they are variables is hidden here so that
+ *	we can easily make them constant if we so desire.
+ */
+#define	PAGE_SIZE	cnt.v_page_size		/* size of page */
+#define PAGE_MASK	page_mask		/* size of page - 1 */
+#define PAGE_SHIFT	page_shift		/* bits to shift for pages */
+#ifdef KERNEL
+extern vm_size_t	page_mask;
+extern int		page_shift;
+#endif
+
+/*
+ * CTL_VM identifiers
+ */
+#define	VM_METER	 1		/* struct vmmeter */
+#define	VM_LOADAVG	 2		/* struct loadavg */
+#define	VM_MAXID	 3		/* number of valid vm ids */
+
+#define CTL_VM_NAMES { \
+	{ 0, 0 }, \
+	{ "vmmeter", CTLTYPE_STRUCT }, \
+	{ "loadavg", CTLTYPE_STRUCT }, \
+}
+
+/* 
+ *	Return values from the VM routines.
+ */
+#define	KERN_SUCCESS		0
+#define	KERN_INVALID_ADDRESS	1
+#define	KERN_PROTECTION_FAILURE	2
+#define	KERN_NO_SPACE		3
+#define	KERN_INVALID_ARGUMENT	4
+#define	KERN_FAILURE		5
+#define	KERN_RESOURCE_SHORTAGE	6
+#define	KERN_NOT_RECEIVER	7
+#define	KERN_NO_ACCESS		8
+
+#ifndef ASSEMBLER
+/*
+ *	Convert addresses to pages and vice versa.
+ *	No rounding is used.
+ */
+#ifdef KERNEL
+#define	atop(x)		(((unsigned)(x)) >> PAGE_SHIFT)
+#define	ptoa(x)		((vm_offset_t)((x) << PAGE_SHIFT))
+
+/*
+ * Round off or truncate to the nearest page.  These will work
+ * for either addresses or counts (i.e., 1 byte rounds to 1 page).
+ */
+#define round_page(x) \
+	((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) & ~PAGE_MASK))
+#define trunc_page(x) \
+	((vm_offset_t)(((vm_offset_t)(x)) & ~PAGE_MASK))
+#define num_pages(x) \
+	((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT))
+
+extern vm_size_t	mem_size;	/* size of physical memory (bytes) */
+extern vm_offset_t	first_addr;	/* first physical page */
+extern vm_offset_t	last_addr;	/* last physical page */
+
+#else
+/* out-of-kernel versions of round_page and trunc_page */
+#define	round_page(x) \
+       ((((vm_offset_t)(x) + (vm_page_size - 1)) / vm_page_size) * vm_page_size)
+#define	trunc_page(x) \
+	((((vm_offset_t)(x)) / vm_page_size) * vm_page_size)
+
+#endif /* KERNEL */
+#endif /* ASSEMBLER */
+#endif /* _VM_PARAM_ */