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- /*
- * Copyright (c) 1991 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 7.2 (Berkeley) 4/21/91
- *
- *
- * 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_
-
- #ifdef KERNEL
- #include "machine/vmparam.h"
- #else
- #include <machine/vmparam.h>
- #endif
-
- /*
- * 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.
- */
-
- /*
- * 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 page_size /* size of page in addressible units */
- #define PAGE_SHIFT page_shift /* number of bits to shift for pages */
-
- /*
- * 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
-
- #ifdef ASSEMBLER
- #else 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))
- #endif KERNEL
-
- /*
- * Round off or truncate to the nearest page. These will work
- * for either addresses or counts. (i.e. 1 byte rounds to 1 page
- * bytes.
- */
-
- #ifdef KERNEL
- #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))
- #else KERNEL
- #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
-
- #ifdef KERNEL
- extern vm_size_t page_size; /* machine independent page size */
- extern vm_size_t page_mask; /* page_size - 1; mask for
- offset within page */
- extern int page_shift; /* shift to use for page size */
-
- 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 */
- #endif KERNEL
-
- #endif ASSEMBLER
-
- #endif _VM_PARAM_
-