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vmparam.h revision 1.14 
      1 /*	$NetBSD: vmparam.h,v 1.14 2003/04/02 07:35:57 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_BASE are constant across all processes
     50  */
     51 #define	KERNEL_BASE		0xc0000000
     52 
     53 /* Various constants used by the MD code*/
     54 #define	KERNEL_TEXT_BASE	(KERNEL_BASE + 0x00200000)
     55 #define	APTE_BASE		(KERNEL_BASE + 0x00c00000)
     56 #define	KERNEL_VM_BASE		(KERNEL_BASE + 0x01000000)
     57 /*
     58  * The Kernel VM Size varies depending on the machine depending on how
     59  * much space is needed (and where) for other mappings.
     60  * In some cases the chosen value may not be the maximum in order that
     61  * we don't waste memory with kernel pages tables as we can't currently
     62  * grow the kernel page tables after booting.
     63  * You only need to increase these values if you find that the number of
     64  * buffers is being limited due to lack of VA space.
     65  */
     66 /*
     67  * The range 0xc1000000 - 0xccffffff is available for kernel VM space
     68  * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
     69  */
     70 #define KERNEL_VM_SIZE		0x0C000000
     71 
     72 /*
     73  * Override the default pager_map size, there's not enough KVA.
     74  */
     75 #define PAGER_MAP_SIZE		(4 * 1024 * 1024)
     76 
     77 /*
     78  * Size of User Raw I/O map
     79  */
     80 
     81 #define USRIOSIZE       300
     82 
     83 /* XXX max. amount of KVM to be used by buffers. */
     84 #ifndef VM_MAX_KERNEL_BUF
     85 #define VM_MAX_KERNEL_BUF \
     86 	((KERNEL_VM_SIZE) * 4 / 10)
     87 #endif
     88 
     89 /* virtual sizes (bytes) for various kernel submaps */
     90 
     91 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
     92 
     93 /*
     94  * max number of non-contig chunks of physical RAM you can have
     95  */
     96 
     97 #define	VM_PHYSSEG_MAX		32
     98 
     99 /*
    100  * when converting a physical address to a vm_page structure, we
    101  * want to use a binary search on the chunks of physical memory
    102  * to find our RAM
    103  */
    104 
    105 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
    106 
    107 /*
    108  * this indicates that we can't add RAM to the VM system after the
    109  * vm system is init'd.
    110  */
    111 
    112 #define	VM_PHYSSEG_NOADD
    113 
    114 /*
    115  * we support 2 free lists:
    116  *
    117  *	- DEFAULT for all systems
    118  *	- ISADMA for the ISA DMA range on Sharks only
    119  */
    120 
    121 #define	VM_NFREELIST		2
    122 #define	VM_FREELIST_DEFAULT	0
    123 #define	VM_FREELIST_ISADMA	1
    124 
    125 #endif /* _KERNEL */
    126 
    127 #endif	/* _ARM32_VMPARAM_H_ */
    128