[unix-history] / usr / src / sys.386bsd / 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.
 *
 * 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_
Commit	Line	Data
b688fc87 WJ	1	/*
	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	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*
	36	* @(#)vm_param.h 7.2 (Berkeley) 4/21/91
	37	*
	38	*
	39	* Copyright (c) 1987, 1990 Carnegie-Mellon University.
	40	* All rights reserved.
	41	*
	42	* Authors: Avadis Tevanian, Jr., Michael Wayne Young
	43	*
	44	* Permission to use, copy, modify and distribute this software and
	45	* its documentation is hereby granted, provided that both the copyright
	46	* notice and this permission notice appear in all copies of the
	47	* software, derivative works or modified versions, and any portions
	48	* thereof, and that both notices appear in supporting documentation.
	49	*
	50	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	51	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
	52	* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	53	*
	54	* Carnegie Mellon requests users of this software to return to
	55	*
	56	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	57	* School of Computer Science
	58	* Carnegie Mellon University
	59	* Pittsburgh PA 15213-3890
	60	*
	61	* any improvements or extensions that they make and grant Carnegie the
	62	* rights to redistribute these changes.
	63	*/
	64
65	/*
66	* Machine independent virtual memory parameters.
67	*/
68
69	#ifndef _VM_PARAM_
70	#define _VM_PARAM_
71
72	#ifdef KERNEL
73	#include "machine/vmparam.h"
74	#else
75	#include <machine/vmparam.h>
76	#endif
77
78	/*
79	* This belongs in types.h, but breaks too many existing programs.
80	*/
81	typedef int boolean_t;
82	#define TRUE 1
83	#define FALSE 0
84
85	/*
86	* The machine independent pages are refered to as PAGES. A page
87	* is some number of hardware pages, depending on the target machine.
88	*/
89
90	/*
91	* All references to the size of a page should be done with PAGE_SIZE
92	* or PAGE_SHIFT. The fact they are variables is hidden here so that
93	* we can easily make them constant if we so desire.
94	*/
95
96	#define PAGE_SIZE page_size /* size of page in addressible units */
97	#define PAGE_SHIFT page_shift /* number of bits to shift for pages */
98
99	/*
100	* Return values from the VM routines.
101	*/
102	#define KERN_SUCCESS 0
103	#define KERN_INVALID_ADDRESS 1
104	#define KERN_PROTECTION_FAILURE 2
105	#define KERN_NO_SPACE 3
106	#define KERN_INVALID_ARGUMENT 4
107	#define KERN_FAILURE 5
108	#define KERN_RESOURCE_SHORTAGE 6
109	#define KERN_NOT_RECEIVER 7
110	#define KERN_NO_ACCESS 8
111
112	#ifdef ASSEMBLER
113	#else ASSEMBLER
114	/*
115	* Convert addresses to pages and vice versa.
116	* No rounding is used.
117	*/
118
119	#ifdef KERNEL
120	#define atop(x) (((unsigned)(x)) >> page_shift)
121	#define ptoa(x) ((vm_offset_t)((x) << page_shift))
122	#endif KERNEL
123
124	/*
125	* Round off or truncate to the nearest page. These will work
126	* for either addresses or counts. (i.e. 1 byte rounds to 1 page
127	* bytes.
128	*/
129
130	#ifdef KERNEL
131	#define round_page(x) ((vm_offset_t)((((vm_offset_t)(x)) + page_mask) & ~page_mask))
132	#define trunc_page(x) ((vm_offset_t)(((vm_offset_t)(x)) & ~page_mask))
133	#else KERNEL
134	#define round_page(x) ((((vm_offset_t)(x) + (vm_page_size - 1)) / vm_page_size) * vm_page_size)
135	#define trunc_page(x) ((((vm_offset_t)(x)) / vm_page_size) * vm_page_size)
136	#endif KERNEL
137
138	#ifdef KERNEL
139	extern vm_size_t page_size; /* machine independent page size */
140	extern vm_size_t page_mask; /* page_size - 1; mask for
141	offset within page */
142	extern int page_shift; /* shift to use for page size */
143
144	extern vm_size_t mem_size; /* size of physical memory (bytes) */
145	extern vm_offset_t first_addr; /* first physical page */
146	extern vm_offset_t last_addr; /* last physical page */
147	#endif KERNEL
148
149	#endif ASSEMBLER
150
151	#endif _VM_PARAM_