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vmparam.h revision 1.3.2.4 
      1 /*	$NetBSD: vmparam.h,v 1.3.2.4 2002/04/01 07:39:46 nathanw Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef	_ARM32_VMPARAM_H_
     37 #define	_ARM32_VMPARAM_H_
     38 
     39 #ifdef _KERNEL
     40 
     41 #include <arm/arm32/vmparam.h>
     42 
     43 #define	USRTEXT		VM_MIN_ADDRESS
     44 #define	USRSTACK	VM_MAXUSER_ADDRESS
     45 
     46 /*
     47  * Note that MAXTSIZ mustn't be greater than 32M. Otherwise you'd have
     48  * to change the compiler to not generate bl instructions
     49  */
     50 #define	MAXTSIZ		(16*1024*1024)		/* max text size */
     51 #ifndef	DFLDSIZ
     52 #define	DFLDSIZ		(128*1024*1024)		/* initial data size limit */
     53 #endif
     54 #ifndef	MAXDSIZ
     55 #define	MAXDSIZ		(512*1024*1024)		/* max data size */
     56 #endif
     57 #ifndef	DFLSSIZ
     58 #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
     59 #endif
     60 #ifndef	MAXSSIZ
     61 #define	MAXSSIZ		(8*1024*1024)		/* max stack size */
     62 #endif
     63 
     64 /*
     65  * Address space constants
     66  */
     67 
     68 /*
     69  * The line between user space and kernel space
     70  * Mappings >= KERNEL_BASE are constant across all processes
     71  */
     72 #define	KERNEL_BASE		0xc0000000
     73 
     74 /* Various constants used by the MD code*/
     75 #define	KERNEL_TEXT_BASE	(KERNEL_BASE + 0x00200000)
     76 #define	APTE_BASE		(KERNEL_BASE + 0x00c00000)
     77 #define	KERNEL_VM_BASE		(KERNEL_BASE + 0x01000000)
     78 /*
     79  * The Kernel VM Size varies depending on the machine depending on how
     80  * much space is needed (and where) for other mappings.
     81  * In some cases the chosen value may not be the maximum in order that
     82  * we don't waste memory with kernel pages tables as we can't currently
     83  * grow the kernel page tables after booting.
     84  * You only need to increase these values if you find that the number of
     85  * buffers is being limited due to lack of VA space.
     86  */
     87 /*
     88  * The range 0xc1000000 - 0xccffffff is available for kernel VM space
     89  * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
     90  */
     91 #define KERNEL_VM_SIZE		0x0C000000
     92 
     93 /*
     94  * Override the default pager_map size, there's not enough KVA.
     95  */
     96 #define PAGER_MAP_SIZE		(4 * 1024 * 1024)
     97 
     98 /*
     99  * Size of User Raw I/O map
    100  */
    101 
    102 #define USRIOSIZE       300
    103 
    104 /* XXX max. amount of KVM to be used by buffers. */
    105 #ifndef VM_MAX_KERNEL_BUF
    106 #define VM_MAX_KERNEL_BUF \
    107 	((KERNEL_VM_SIZE) * 4 / 10)
    108 #endif
    109 
    110 /* virtual sizes (bytes) for various kernel submaps */
    111 
    112 #define VM_PHYS_SIZE		(USRIOSIZE*NBPG)
    113 
    114 /*
    115  * max number of non-contig chunks of physical RAM you can have
    116  */
    117 
    118 #define	VM_PHYSSEG_MAX		32
    119 
    120 /*
    121  * when converting a physical address to a vm_page structure, we
    122  * want to use a binary search on the chunks of physical memory
    123  * to find our RAM
    124  */
    125 
    126 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
    127 
    128 /*
    129  * this indicates that we can't add RAM to the VM system after the
    130  * vm system is init'd.
    131  */
    132 
    133 #define	VM_PHYSSEG_NOADD
    134 
    135 /*
    136  * we support 2 free lists:
    137  *
    138  *	- DEFAULT for all systems
    139  *	- ISADMA for the ISA DMA range on Sharks only
    140  */
    141 
    142 #define	VM_NFREELIST		2
    143 #define	VM_FREELIST_DEFAULT	0
    144 #define	VM_FREELIST_ISADMA	1
    145 
    146 #endif /* _KERNEL */
    147 
    148 #endif	/* _ARM32_VMPARAM_H_ */
    149