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vmparam.h revision 1.8 
      1 /*	$NetBSD: vmparam.h,v 1.8 2002/03/23 02:28:42 thorpej 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 /*
     44  * Address space constants
     45  */
     46 
     47 /*
     48  * The line between user space and kernel space
     49  * Mappings >= KERNEL_SPACE_START are constant across all processes
     50  */
     51 #define	KERNEL_SPACE_START	0xf0000000
     52 
     53 /* Various constants used by the MD code*/
     54 #define	KERNEL_BASE		0xf0000000
     55 #define	KERNEL_TEXT_BASE	(KERNEL_BASE + 0x00000000)
     56 #define	APTE_BASE		(KERNEL_BASE + 0x00c00000)
     57 #define	KERNEL_VM_BASE		(KERNEL_BASE + 0x01000000)
     58 /*
     59  * The Kernel VM Size varies depending on the machine depending on how
     60  * much space is needed (and where) for other mappings.
     61  * In some cases the chosen value may not be the maximum in order that
     62  * we don't waste memory with kernel pages tables as we can't currently
     63  * grow the kernel page tables after booting.
     64  * You only need to increase these values if you find that the number of
     65  * buffers is being limited due to lack of VA space.
     66  */
     67 /*
     68  * The range 0xf1000000 - 0xf5ffffff is available for kernel VM space
     69  * Fixed mappings exist from 0xf6000000 - 0xffffffff
     70  */
     71 #define	KERNEL_VM_SIZE		0x05000000
     72 
     73 /*
     74  * Override the default pager_map size, there's not enough KVA.
     75  */
     76 #define PAGER_MAP_SIZE		(4 * 1024 * 1024)
     77 
     78 /*
     79  * Size of User Raw I/O map
     80  */
     81 
     82 #define USRIOSIZE       300
     83 
     84 /* XXX max. amount of KVM to be used by buffers. */
     85 #ifndef VM_MAX_KERNEL_BUF
     86 #define VM_MAX_KERNEL_BUF \
     87 	((KERNEL_VM_SIZE) * 4 / 10)
     88 #endif
     89 
     90 /* virtual sizes (bytes) for various kernel submaps */
     91 
     92 #define VM_PHYS_SIZE		(USRIOSIZE*NBPG)
     93 
     94 /*
     95  * max number of non-contig chunks of physical RAM you can have
     96  */
     97 
     98 #define	VM_PHYSSEG_MAX		32
     99 
    100 /*
    101  * when converting a physical address to a vm_page structure, we
    102  * want to use a binary search on the chunks of physical memory
    103  * to find our RAM
    104  */
    105 
    106 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
    107 
    108 /*
    109  * this indicates that we can't add RAM to the VM system after the
    110  * vm system is init'd.
    111  */
    112 
    113 #define	VM_PHYSSEG_NOADD
    114 
    115 /*
    116  * we support 2 free lists:
    117  *
    118  *	- DEFAULT for all systems
    119  *	- ISADMA for the ISA DMA range on Sharks only
    120  *	- RPCDMA for the DMA range on RiscPC's + Kinetic cards
    121  */
    122 
    123 #define	VM_NFREELIST		2
    124 #define	VM_FREELIST_DEFAULT	0
    125 #define	VM_FREELIST_ISADMA	1
    126 #define VM_FREELIST_RPCDMA	1
    127 
    128 #endif /* _KERNEL */
    129 
    130 #endif	/* _ARM32_VMPARAM_H_ */
    131