[unix-history] / usr / src / sys / vm / vm_param.h

/* 
 * 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.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)vm_param.h	7.5 (Berkeley) %G%
 *
 *
 * 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.
 */
#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


/* 
 *	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))
#define num_pages(x) \
	((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT))
#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	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_
Commit	Line	Data
175f072e	1	/*
175f072e KM	2	* Copyright (c) 1991 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* The Mach Operating System project at Carnegie-Mellon University.
	7	*
0e24ad83	8	* %sccs.include.redist.c%
175f072e	9	*
9e46e59c	10	* @(#)vm_param.h 7.5 (Berkeley) %G%
0e24ad83 KM	11	*
	12	*
	13	* Copyright (c) 1987, 1990 Carnegie-Mellon University.
	14	* All rights reserved.
	15	*
	16	* Authors: Avadis Tevanian, Jr., Michael Wayne Young
	17	*
	18	* Permission to use, copy, modify and distribute this software and
	19	* its documentation is hereby granted, provided that both the copyright
	20	* notice and this permission notice appear in all copies of the
	21	* software, derivative works or modified versions, and any portions
	22	* thereof, and that both notices appear in supporting documentation.
	23	*
	24	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	25	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
	26	* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	27	*
	28	* Carnegie Mellon requests users of this software to return to
	29	*
	30	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	31	* School of Computer Science
	32	* Carnegie Mellon University
	33	* Pittsburgh PA 15213-3890
	34	*
	35	* any improvements or extensions that they make and grant Carnegie the
	36	* rights to redistribute these changes.
175f072e KM	37	*/
	38
	39	/*
	40	* Machine independent virtual memory parameters.
	41	*/
	42
	43	#ifndef _VM_PARAM_
	44	#define _VM_PARAM_
	45
	46	#ifdef KERNEL
	47	#include "machine/vmparam.h"
	48	#else
	49	#include <machine/vmparam.h>
	50	#endif
	51
	52	/*
	53	* This belongs in types.h, but breaks too many existing programs.
	54	*/
	55	typedef int boolean_t;
	56	#define TRUE 1
	57	#define FALSE 0
	58
	59	/*
	60	* The machine independent pages are refered to as PAGES. A page
	61	* is some number of hardware pages, depending on the target machine.
	62	*/
c34d10ef	63	#define DEFAULT_PAGE_SIZE 4096
175f072e KM	64
	65	/*
	66	* All references to the size of a page should be done with PAGE_SIZE
	67	* or PAGE_SHIFT. The fact they are variables is hidden here so that
	68	* we can easily make them constant if we so desire.
	69	*/
f92ce83a	70	#define PAGE_SIZE cnt.v_page_size /* size of page */
9e46e59c	71	#define PAGE_MASK page_mask /* size of page - 1 */
c34d10ef	72	#define PAGE_SHIFT page_shift /* bits to shift for pages */
9e46e59c KM	73	#ifdef KERNEL
	74	extern vm_size_t page_mask;
	75	extern int page_shift;
	76	#endif
	77
175f072e KM	78
	79	/*
	80	* Return values from the VM routines.
	81	*/
	82	#define KERN_SUCCESS 0
	83	#define KERN_INVALID_ADDRESS 1
	84	#define KERN_PROTECTION_FAILURE 2
	85	#define KERN_NO_SPACE 3
	86	#define KERN_INVALID_ARGUMENT 4
	87	#define KERN_FAILURE 5
	88	#define KERN_RESOURCE_SHORTAGE 6
	89	#define KERN_NOT_RECEIVER 7
	90	#define KERN_NO_ACCESS 8
	91
	92	#ifdef ASSEMBLER
	93	#else ASSEMBLER
	94	/*
	95	* Convert addresses to pages and vice versa.
	96	* No rounding is used.
	97	*/
	98
	99	#ifdef KERNEL
9e46e59c KM	100	#define atop(x) (((unsigned)(x)) >> PAGE_SHIFT)
9e46e59c KM	101	#define ptoa(x) ((vm_offset_t)((x) << PAGE_SHIFT))
175f072e KM	102	#endif KERNEL
	103
	104	/*
	105	* Round off or truncate to the nearest page. These will work
	106	* for either addresses or counts. (i.e. 1 byte rounds to 1 page
	107	* bytes.
	108	*/
	109
	110	#ifdef KERNEL
9e46e59c KM	111	#define round_page(x) \
	112	((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) & ~PAGE_MASK))
	113	#define trunc_page(x) \
	114	((vm_offset_t)(((vm_offset_t)(x)) & ~PAGE_MASK))
	115	#define num_pages(x) \
	116	((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT))
175f072e	117	#else KERNEL
9e46e59c KM	118	#define round_page(x) \
	119	((((vm_offset_t)(x) + (vm_page_size - 1)) / vm_page_size) * vm_page_size)
	120	#define trunc_page(x) \
	121	((((vm_offset_t)(x)) / vm_page_size) * vm_page_size)
175f072e KM	122	#endif KERNEL
	123
	124	#ifdef KERNEL
175f072e KM	125	extern vm_size_t mem_size; /* size of physical memory (bytes) */
	126	extern vm_offset_t first_addr; /* first physical page */
	127	extern vm_offset_t last_addr; /* last physical page */
	128	#endif KERNEL
	129
	130	#endif ASSEMBLER
	131
	132	#endif _VM_PARAM_