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Diffstat (limited to 'sys/vm/vm_param.h')
| -rw-r--r-- | sys/vm/vm_param.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/sys/vm/vm_param.h b/sys/vm/vm_param.h new file mode 100644 index 000000000000..32f35ce01360 --- /dev/null +++ b/sys/vm/vm_param.h @@ -0,0 +1,153 @@ +/* + * 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. + * + * from: @(#)vm_param.h 7.2 (Berkeley) 4/21/91 + * $Id: vm_param.h,v 1.2 1993/10/16 16:20:53 rgrimes Exp $ + */ + +/* + * 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_ |