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vmparam.h revision 1.16 
      1 /*	$NetBSD: vmparam.h,v 1.16 2003/04/29 14:04:01 scw 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 #ifndef ARM32_NEW_VM_LAYOUT
     54 /* Various constants used by the MD code*/
     55 #define	KERNEL_TEXT_BASE	(KERNEL_BASE + 0x00200000)
     56 #ifndef ARM32_PMAP_NEW
     57 #define	APTE_BASE		(KERNEL_BASE + 0x00c00000)
     58 #endif
     59 #define	KERNEL_VM_BASE		(KERNEL_BASE + 0x01000000)
     60 #endif
     61 /*
     62  * The Kernel VM Size varies depending on the machine depending on how
     63  * much space is needed (and where) for other mappings.
     64  * In some cases the chosen value may not be the maximum in order that
     65  * we don't waste memory with kernel pages tables as we can't currently
     66  * grow the kernel page tables after booting.
     67  * You only need to increase these values if you find that the number of
     68  * buffers is being limited due to lack of VA space.
     69  */
     70 /*
     71  * The range 0xc1000000 - 0xccffffff is available for kernel VM space
     72  * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
     73  */
     74 #define KERNEL_VM_SIZE		0x0C000000
     75 
     76 /*
     77  * Override the default pager_map size, there's not enough KVA.
     78  */
     79 #define PAGER_MAP_SIZE		(4 * 1024 * 1024)
     80 
     81 /*
     82  * Size of User Raw I/O map
     83  */
     84 
     85 #define USRIOSIZE       300
     86 
     87 /* XXX max. amount of KVM to be used by buffers. */
     88 #ifndef VM_MAX_KERNEL_BUF
     89 #define VM_MAX_KERNEL_BUF \
     90 	((KERNEL_VM_SIZE) * 4 / 10)
     91 #endif
     92 
     93 /* virtual sizes (bytes) for various kernel submaps */
     94 
     95 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
     96 
     97 /*
     98  * max number of non-contig chunks of physical RAM you can have
     99  */
    100 
    101 #define	VM_PHYSSEG_MAX		32
    102 
    103 /*
    104  * when converting a physical address to a vm_page structure, we
    105  * want to use a binary search on the chunks of physical memory
    106  * to find our RAM
    107  */
    108 
    109 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
    110 
    111 /*
    112  * this indicates that we can't add RAM to the VM system after the
    113  * vm system is init'd.
    114  */
    115 
    116 #define	VM_PHYSSEG_NOADD
    117 
    118 /*
    119  * we support 2 free lists:
    120  *
    121  *	- DEFAULT for all systems
    122  *	- ISADMA for the ISA DMA range on Sharks only
    123  */
    124 
    125 #define	VM_NFREELIST		2
    126 #define	VM_FREELIST_DEFAULT	0
    127 #define	VM_FREELIST_ISADMA	1
    128 
    129 #endif /* _KERNEL */
    130 
    131 #endif	/* _ARM32_VMPARAM_H_ */
    132