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vmparam.h revision 1.5 
      1 /*-
      2  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to The NetBSD Foundation
      6  * by Matt Thomas <matt (at) 3am-softwre.com> of Allegro Networks, Inc.
      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 NetBSD
     19  *        Foundation, Inc. and its contributors.
     20  * 4. Neither the name of The NetBSD Foundation nor the names of its
     21  *    contributors may be used to endorse or promote products derived
     22  *    from this software without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     25  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     26  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     27  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     28  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     32  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     33  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     34  * POSSIBILITY OF SUCH DAMAGE.
     35  */
     36 
     37 #ifndef _POWERPC_OEA_VMPARAM_H_
     38 #define _POWERPC_OEA_VMPARAM_H_
     39 
     40 #include <sys/queue.h>
     41 
     42 /*
     43  * Most of the definitions in this can be overriden by a machine-specific
     44  * vmparam.h if required.  Otherwise a port can just include this file
     45  * get the right thing to happen.
     46  */
     47 
     48 #ifndef	USRSTACK
     49 #define	USRSTACK		VM_MAXUSER_ADDRESS
     50 #endif
     51 
     52 #ifndef	USRSTACK32
     53 #define	USRSTACK32		((uint32_t)VM_MAXUSER_ADDRESS)
     54 #endif
     55 
     56 #ifndef	MAXTSIZ
     57 #define	MAXTSIZ			(64*1024*1024)		/* maximum text size */
     58 #endif
     59 
     60 #ifndef	MAXDSIZ
     61 #define	MAXDSIZ			(1024*1024*1024)	/* maximum data size */
     62 #endif
     63 
     64 #ifndef	MAXSSIZ
     65 #define	MAXSSIZ			(32*1024*1024)		/* maximum stack size */
     66 #endif
     67 
     68 #ifndef	DFLDSIZ
     69 #define	DFLDSIZ			(128*1024*1024)		/* default data size */
     70 #endif
     71 
     72 #ifndef	DFLSSIZ
     73 #define	DFLSSIZ			(2*1024*1024)		/* default stack size */
     74 #endif
     75 
     76 /*
     77  * Default maximum amount of shared memory pages
     78  */
     79 #ifndef SHMMAXPGS
     80 #define	SHMMAXPGS		1024
     81 #endif
     82 
     83 /*
     84  * Default number of pages in the user raw I/O map.
     85  */
     86 #ifndef USRIOSIZE
     87 #define	USRIOSIZE		1024
     88 #endif
     89 
     90 /*
     91  * The number of seconds for a process to be blocked before being
     92  * considered very swappable.
     93  */
     94 #ifndef MAXSLP
     95 #define	MAXSLP			20
     96 #endif
     97 
     98 /*
     99  * Segment handling stuff
    100  */
    101 #define	SEGMENT_LENGTH	( 0x10000000L)
    102 #define	SEGMENT_MASK	(~0x0fffffffL)
    103 
    104 /*
    105  * Macros to manipulate VSIDs
    106  */
    107 #if 0
    108 /*
    109  * Move the SR# to the top 4 bits to make the lower 20 bits entirely random
    110  * so to give better PTE distribution.
    111  */
    112 #define	VSID_MAKE(sr, hash)	(((sr) << (ADDR_SR_SHFT-4))|((hash) & 0xfffff))
    113 #define	VSID_TO_SR(vsid)	(((vsid) >> (ADDR_SR_SHFT-4)) & 0xF)
    114 #define	VSID_TO_HASH(vsid)	((vsid) & 0xfffff)
    115 #define	VSID_SR_INCREMENT	0x00100000
    116 #else
    117 #define	VSID_MAKE(sr, hash)	((sr) | (((hash) & 0xfffff) << 4))
    118 #define	VSID_TO_SR(vsid)	((vsid) & 0xF)
    119 #define	VSID_TO_HASH(vsid)	(((vsid) >> 4) & 0xfffff)
    120 #define	VSID_SR_INCREMENT	0x00000001
    121 #endif
    122 
    123 /*
    124  * Fixed segments
    125  */
    126 #ifndef USER_SR
    127 #define	USER_SR			12
    128 #endif
    129 #ifndef KERNEL_SR
    130 #define	KERNEL_SR		13
    131 #endif
    132 #ifndef KERNEL2_SR
    133 #define	KERNEL2_SR		14
    134 #endif
    135 #define	KERNEL2_SEGMENT		VSID_MAKE(KERNEL2_SR, KERNEL_VSIDBITS)
    136 #define	KERNEL_VSIDBITS		0xfffff
    137 #define	KERNEL_SEGMENT		VSID_MAKE(KERNEL_SR, KERNEL_VSIDBITS)
    138 #define	EMPTY_SEGMENT		VSID_MAKE(0, KERNEL_VSIDBITS)
    139 #define	USER_ADDR		((void *)(USER_SR << ADDR_SR_SHFT))
    140 
    141 /*
    142  * Some system constants
    143  */
    144 #ifndef	NPMAPS
    145 #define	NPMAPS		32768	/* Number of pmaps in system */
    146 #endif
    147 
    148 #define	VM_MIN_ADDRESS		((vaddr_t) 0)
    149 #define	VM_MAXUSER_ADDRESS	((vaddr_t) ~0xfffL)
    150 #define	VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
    151 #define	VM_MIN_KERNEL_ADDRESS	((vaddr_t) (KERNEL_SR << ADDR_SR_SHFT))
    152 #define	VM_MAX_KERNEL_ADDRESS	(VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH)
    153 
    154 /*
    155  * The address to which unspecified mapping requests default
    156  * Put the stack in it's own segment and start mmaping at the
    157  * top of the next lower segment.
    158  */
    159 #ifdef _KERNEL_OPT
    160 #include "opt_uvm.h"
    161 #endif
    162 #define	__HAVE_TOPDOWN_VM
    163 #ifdef USE_TOPDOWN_VM
    164 #define	VM_DEFAULT_ADDRESS(da, sz) \
    165 	(((VM_MAXUSER_ADDRESS - MAXSSIZ) & SEGMENT_MASK) - round_page(sz))
    166 #endif
    167 
    168 #ifndef VM_PHYSSEG_MAX
    169 #define	VM_PHYSSEG_MAX		16
    170 #endif
    171 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BIGFIRST
    172 #define	VM_PHYSSEG_NOADD
    173 
    174 #ifndef VM_PHYS_SIZE
    175 #define	VM_PHYS_SIZE		(USRIOSIZE * PAGE_SIZE)
    176 #endif
    177 
    178 #ifndef VM_MAX_KERNEL_BUF
    179 #define	VM_MAX_KERNEL_BUF	(SEGMENT_LENGTH * 3 / 4)
    180 #endif
    181 
    182 #define	VM_NFREELIST		16	/* 16 distinct memory segments */
    183 #define	VM_FREELIST_DEFAULT	0
    184 #define	VM_FREELIST_FIRST256	1
    185 #define	VM_FREELIST_FIRST16	2
    186 #define	VM_FREELIST_MAX		3
    187 
    188 #ifndef _LOCORE
    189 
    190 LIST_HEAD(pvo_head, pvo_entry);
    191 
    192 #if __NetBSD_Version__ > 105180000
    193 #define	__HAVE_VM_PAGE_MD
    194 
    195 struct vm_page_md {
    196 	struct pvo_head mdpg_pvoh;
    197 	unsigned int mdpg_attrs;
    198 };
    199 
    200 #define	VM_MDPAGE_INIT(pg) do {			\
    201 	LIST_INIT(&(pg)->mdpage.mdpg_pvoh);	\
    202 	(pg)->mdpage.mdpg_attrs = 0;		\
    203 } while (/*CONSTCOND*/0)
    204 
    205 #else
    206 
    207 #define	__HAVE_PMAP_PHYSSEG
    208 
    209 struct pmap_physseg {
    210 	struct pvo_head *pvoh;
    211 	char *attrs;
    212 };
    213 
    214 #endif
    215 
    216 #endif	/* _LOCORE */
    217 
    218 #endif /* _POWERPC_OEA_VMPARAM_H_ */
    219