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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /*
- * @OSF_COPYRIGHT@
- */
- /*
- * Mach Operating System
- * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
- * All Rights Reserved.
- *
- * 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 Mellon
- * the rights to redistribute these changes.
- */
- /*
- */
- /*
- * File: mach/vm_param.h
- * Author: Avadis Tevanian, Jr., Michael Wayne Young
- * Date: 1985
- *
- * Machine independent virtual memory parameters.
- *
- */
-
- #ifndef _MACH_VM_PARAM_H_
- #define _MACH_VM_PARAM_H_
-
-
- #error YOU HAVE MADE A MISTAKE BY INCLUDING THIS FILE;
- #error
- #error THIS FILE SHOULD NOT BE VISIBLE TO USER PROGRAMS.
- #error
- #error USE <mach/machine/vm_param.h> TO GET MACHINE-DEPENDENT ADDRESS
- #error SPACE AND PAGE SIZE ITEMS.
- #error
- #error USE <mach/machine/vm_types.h> TO GET TYPE DECLARATIONS USED IN
- #error THE MACH KERNEL INTERFACE.
- #error
- #error IN ALL PROBABILITY, YOU SHOULD GET ALL OF THE TYPES USED IN THE
- #error INTERFACE FROM <mach/mach_types.h>
-
-
- #include <mach/machine/vm_param.h>
- #include <mach/machine/vm_types.h>
-
- /*
- * 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.
- */
-
- /*
- * Regardless whether it is implemented with a constant or a variable,
- * the PAGE_SIZE is assumed to be a power of two throughout the
- * virtual memory system implementation.
- */
-
- #ifndef PAGE_SIZE_FIXED
- extern vm_size_t page_size;
- extern vm_size_t page_mask;
- extern int page_shift;
-
- #define PAGE_SIZE page_size /* pagesize in addr units */
- #define PAGE_SHIFT page_shift /* number of bits to shift for pages */
- #define PAGE_MASK page_mask /* mask for off in page */
-
- #define PAGE_SIZE_64 (unsigned long long)page_size /* pagesize in addr units */
- #define PAGE_MASK_64 (unsigned long long)page_mask /* mask for off in page */
- #else /* PAGE_SIZE_FIXED */
- #define PAGE_SIZE 4096
- #define PAGE_SHIFT 12
- #define PAGE_MASK (PAGE_SIZE-1)
- #define PAGE_SIZE_64 (unsigned long long)4096
- #define PAGE_MASK_64 (PAGE_SIZE_64-1)
- #endif /* PAGE_SIZE_FIXED */
-
- #ifndef ASSEMBLER
- /*
- * Convert addresses to pages and vice versa.
- * No rounding is used.
- */
-
- #define atop(x) (((natural_t)(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
- * bytes.
- */
-
- #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 round_page_64(x) ((unsigned long long)((((unsigned long long)(x)) + PAGE_MASK_64) & ~PAGE_MASK_64))
- #define trunc_page_64(x) ((unsigned long long)(((unsigned long long)(x)) & ~PAGE_MASK_64))
-
- /*
- * Determine whether an address is page-aligned, or a count is
- * an exact page multiple.
- */
-
- #define page_aligned(x) ((((vm_object_offset_t) (x)) & PAGE_MASK) == 0)
-
- extern vm_size_t mem_size; /* size of physical memory (bytes) */
-
- #endif /* ASSEMBLER */
- #endif /* _MACH_VM_PARAM_H_ */
-