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      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  *
     17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     27  * POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #ifndef _POWERPC_OEA_VMPARAM_H_
     31 #define _POWERPC_OEA_VMPARAM_H_
     32 
     33 #include <sys/queue.h>
     34 
     35 /*
     36  * Most of the definitions in this can be overridden by a machine-specific
     37  * vmparam.h if required.  Otherwise a port can just include this file
     38  * get the right thing to happen.
     39  */
     40 
     41 /*
     42  * OEA processors have 4K pages.  Override the PAGE_* definitions
     43  * to be compile-time constants.
     44  */
     45 #define	PAGE_SHIFT	12
     46 #define	PAGE_SIZE	(1 << PAGE_SHIFT)
     47 #define	PAGE_MASK	(PAGE_SIZE - 1)
     48 
     49 #ifndef	USRSTACK
     50 #define	USRSTACK	VM_MAXUSER_ADDRESS
     51 #endif
     52 
     53 #ifndef	USRSTACK32
     54 #define	USRSTACK32	VM_MAXUSER_ADDRESS32
     55 #endif
     56 
     57 #ifndef	MAXTSIZ
     58 #define	MAXTSIZ		(256*1024*1024)		/* maximum text size */
     59 #endif
     60 
     61 #ifndef	MAXDSIZ
     62 #define	MAXDSIZ		(1024*1024*1024)	/* maximum data size */
     63 #endif
     64 
     65 #ifndef	MAXDSIZ32
     66 #define	MAXDSIZ32	(1024*1024*1024)	/* maximum data size */
     67 #endif
     68 
     69 #ifndef	MAXSSIZ
     70 #define	MAXSSIZ		(32*1024*1024)		/* maximum stack size */
     71 #endif
     72 
     73 #ifndef	MAXSSIZ32
     74 #define	MAXSSIZ32	(32*1024*1024)		/* maximum stack size */
     75 #endif
     76 
     77 #ifndef	DFLDSIZ
     78 #define	DFLDSIZ		(256*1024*1024)		/* default data size */
     79 #endif
     80 
     81 #ifndef	DFLDSIZ32
     82 #define	DFLSSIZ32	(256*1024*1024)
     83 #endif
     84 
     85 #ifndef	DFLSSIZ
     86 #define	DFLSSIZ		(2*1024*1024)		/* default stack size */
     87 #endif
     88 
     89 #ifndef	DFLSSIZ32
     90 #define	DFLSSIZ32	(2*1024*1024)		/* default stack size */
     91 #endif
     92 
     93 /*
     94  * Default number of pages in the user raw I/O map.
     95  */
     96 #ifndef USRIOSIZE
     97 #define	USRIOSIZE	1024
     98 #endif
     99 
    100 /*
    101  * The number of seconds for a process to be blocked before being
    102  * considered very swappable.
    103  */
    104 #ifndef MAXSLP
    105 #define	MAXSLP		20
    106 #endif
    107 
    108 /*
    109  * Segment handling stuff
    110  */
    111 #define	SEGMENT_LENGTH	( 0x10000000L)
    112 #define	SEGMENT_MASK	(~0x0fffffffL)
    113 #define	NSEGREG		16	/* number of PowerPC segment registers */
    114 
    115 /*
    116  * Macros to manipulate VSIDs
    117  */
    118 #if 0
    119 /*
    120  * Move the SR# to the top bits to make the lower bits entirely random
    121  * so to give better PTE distribution.
    122  */
    123 #define	VSID__KEYSHFT		(SR_VSID_WIDTH - SR_KEY_LEN)
    124 #define	VSID_SR_INCREMENT	((1L << VSID__KEYSHFT) - 1)
    125 #define VSID__HASHMASK		(VSID_SR_INCREMENT - 1)
    126 #define	VSID_MAKE(sr, hash) \
    127 	(( \
    128 	    (((sr) << VSID__KEYSHFT) | ((hash) & VSID__HASMASK))
    129 	    << SR_VSID_SHFT) & SR_VSID)
    130 #define	VSID_TO_SR(vsid) \
    131 	(((vsid) & SR_VSID) >> (SR_VSID_SHFT + VSID__KEYSHFT))
    132 #define	VSID_TO_HASH(vsid) \
    133 	(((vsid) & SR_VSID) >> SR_VSID_SHFT) & VSID__HASHMASK)
    134 #else
    135 #define	VSID__HASHSHFT		(SR_KEY_LEN)
    136 #define	VSID_SR_INCREMENT	(1L << 0)
    137 #define	VSID__KEYMASK		((1L << VSID__HASHSHFT) - 1)
    138 #define	VSID_MAKE(sr, hash) \
    139 	(( \
    140 	    (((hash) << VSID__HASHSHFT) | ((sr) & VSID__KEYMASK)) \
    141 	     << SR_VSID_SHFT) & SR_VSID)
    142 #define	VSID_TO_SR(vsid) \
    143 	(((vsid) >> SR_VSID_SHFT) & VSID__KEYMASK)
    144 #define	VSID_TO_HASH(vsid) \
    145 	(((vsid) & SR_VSID) >> (SR_VSID_SHFT + VSID__HASHSHFT))
    146 #endif /*0*/
    147 
    148 #ifndef _LP64
    149 /*
    150  * Fixed segments
    151  */
    152 #ifndef USER_SR
    153 #define	USER_SR			12
    154 #endif
    155 #ifndef KERNEL_SR
    156 #define	KERNEL_SR		13
    157 #endif
    158 #ifndef KERNEL2_SR
    159 #define	KERNEL2_SR		14
    160 #endif
    161 #define	KERNEL2_SEGMENT		VSID_MAKE(KERNEL2_SR, KERNEL_VSIDBITS)
    162 #endif
    163 #define	KERNEL_VSIDBITS		0xfffff
    164 #define	PHYSMAP_VSIDBITS	0xffffe
    165 #define	PHYSMAPN_SEGMENT(s)	VSID_MAKE(s, PHYSMAP_VSIDBITS)
    166 #define	KERNEL_SEGMENT		VSID_MAKE(KERNEL_SR, KERNEL_VSIDBITS)
    167 #define	KERNELN_SEGMENT(s)	VSID_MAKE(s, KERNEL_VSIDBITS)
    168 /* XXXSL: need something here that will never be mapped */
    169 #define	EMPTY_SEGMENT		VSID_MAKE(0, 0xffffe)
    170 #define	USER_ADDR		((void *)(USER_SR << ADDR_SR_SHFT))
    171 
    172 /*
    173  * Some system constants
    174  */
    175 #ifndef	NPMAPS
    176 #define	NPMAPS		32768	/* Number of pmaps in system */
    177 #endif
    178 
    179 #define	VM_MIN_ADDRESS		((vaddr_t) 0)
    180 #define	VM_MAXUSER_ADDRESS32	((vaddr_t) (uint32_t) ~0xfffL)
    181 #ifdef _LP64
    182 #define	VM_MAXUSER_ADDRESS	((vaddr_t) 1UL << 48) /* 256TB */
    183 #else
    184 #define	VM_MAXUSER_ADDRESS	VM_MAXUSER_ADDRESS32
    185 #endif
    186 #define	VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
    187 #ifdef _LP64
    188 #define	VM_MIN_KERNEL_ADDRESS	((vaddr_t) 0xffffffUL << 40) /* top 1TB */
    189 #define	VM_MAX_KERNEL_ADDRESS	((vaddr_t) -32768)
    190 #else
    191 #define	VM_MIN_KERNEL_ADDRESS	((vaddr_t) (KERNEL_SR << ADDR_SR_SHFT))
    192 #define	VM_MAX_KERNEL_ADDRESS	(VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH)
    193 #endif
    194 
    195 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BIGFIRST
    196 
    197 #ifndef VM_PHYS_SIZE
    198 #define	VM_PHYS_SIZE		(USRIOSIZE * PAGE_SIZE)
    199 #endif
    200 
    201 #endif /* _POWERPC_OEA_VMPARAM_H_ */
    202