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vmparam.h revision 1.48 
      1 /*	$NetBSD: vmparam.h,v 1.48 2020/02/01 19:41:48 tsutsui Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
      6  * All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. 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  * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
     37  *
     38  *	@(#)vmparam.h	7.3 (Berkeley) 5/7/91
     39  */
     40 
     41 #ifndef _MACHINE_VMPARAM_H_
     42 #define _MACHINE_VMPARAM_H_
     43 
     44 /*
     45  * Machine dependent constants for amiga
     46  */
     47 
     48 /*
     49  * Use common m68k definitions to define PAGE_SIZE and related constants.
     50  */
     51 #include <m68k/vmparam.h>
     52 
     53 /*
     54  * USRSTACK is the top (end) of the user stack.
     55  */
     56 
     57 #ifndef USRSTACK
     58 #define	USRSTACK	0x1E000000
     59 #endif
     60 
     61 /*
     62  * Virtual memory related constants, all in bytes
     63  */
     64 
     65 #ifndef MAXTSIZ
     66 #define	MAXTSIZ		(32*1024*1024)		/* max text size */
     67 #endif
     68 #ifndef DFLDSIZ
     69 #define	DFLDSIZ		(64*1024*1024)		/* initial data size limit */
     70 #endif
     71 #ifndef MAXDSIZ
     72 #define	MAXDSIZ		(224*1024*1024)		/* max data size */
     73 #endif
     74 #ifndef	DFLSSIZ
     75 #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
     76 #endif
     77 #ifndef	MAXSSIZ
     78 #define	MAXSSIZ		(32*1024*1024)		/* max stack size */
     79 #endif
     80 
     81 /*
     82  * PTEs for mapping user space into the kernel for phyio operations.
     83  * One page is enough to handle 16Mb of simultaneous raw IO operations.
     84  */
     85 #ifndef USRIOSIZE
     86 #define USRIOSIZE	(1 * NPTEPG)	/* 16mb */
     87 #endif
     88 
     89 /*
     90  * user/kernel map constants
     91  */
     92 #define VM_MIN_ADDRESS		((vaddr_t)0)		/* user min */
     93 #define VM_MAX_ADDRESS		((vaddr_t)(USRSTACK))	/* user max */
     94 #define VM_MAXUSER_ADDRESS	((vaddr_t)(VM_MAX_ADDRESS))	/* same */
     95 #define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
     96 #define VM_MAX_KERNEL_ADDRESS	((vaddr_t)-(NPTEPG * PAGE_SIZE))
     97 
     98 /*
     99  * virtual sizes (bytes) for various kernel submaps
    100  */
    101 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
    102 
    103 /*
    104  * Our bootloader currently passes up to 16 segments (but this is variable)
    105  * Normally, the biggest of them is used for the kernel, and the kernel
    106  * segment is given to VM first.
    107  */
    108 #define VM_PHYSSEG_MAX		(16)
    109 #define VM_PHYSSEG_STRAT	VM_PSTRAT_RANDOM
    110 
    111 /*
    112  * Allow supporting Zorro-II memory as lower priority:
    113  *
    114  *	- DEFAULT for Zorro-III memory (presumably 32 bit)
    115  *	- ZORROII for Zorro-II memory (16 bit, Zorro-II DMA)
    116  */
    117 
    118 #define VM_NFREELIST		2
    119 #define VM_FREELIST_DEFAULT	0
    120 #define VM_FREELIST_ZORROII	1
    121 
    122 #define	__HAVE_PMAP_PHYSSEG
    123 
    124 /*
    125  * pmap-specific data stored in the vm_physmem[] array.
    126  */
    127 struct pmap_physseg {
    128 	struct pv_header *pvheader;	/* pv table for this seg */
    129 };
    130 
    131 /*
    132  * number of kernel PT pages (initial only, can grow dynamically)
    133  */
    134 #define VM_KERNEL_PT_PAGES	((vm_size_t)10)
    135 #endif /* !_MACHINE_VMPARAM_H_ */
    136