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vmparam.h revision 1.5
      1 /*	$NetBSD: vmparam.h,v 1.5 2001/11/23 17:39:05 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 #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  * Size of shared memory map
     66  */
     67 #ifndef SHMMAXPGS
     68 #define SHMMAXPGS       1024
     69 #endif
     70 
     71 /*
     72  * Address space constants
     73  */
     74 
     75 /*
     76  * The line between user space and kernel space
     77  * Mappings >= KERNEL_SPACE_START are constant across all processes
     78  */
     79 #define	KERNEL_SPACE_START	0xa0000000
     80 
     81 /* total number of page table entries to map 4GB * size of each entry*/
     82 #define	PAGE_TABLE_SPACE	((1 << (32 - PGSHIFT)) * sizeof(pt_entry_t))
     83 
     84 /* Address where the page tables are mapped */
     85 #define	PAGE_TABLE_SPACE_START	(KERNEL_SPACE_START - PAGE_TABLE_SPACE)
     86 
     87 /* Various constants used by the MD code*/
     88 #define	KERNEL_BASE		0xa0000000
     89 #define	KERNEL_TEXT_BASE	(KERNEL_BASE + 0x00100000)
     90 #define	ALT_PAGE_TBLS_BASE	(KERNEL_BASE + 0x00c00000)
     91 #define	KERNEL_VM_BASE		(KERNEL_BASE + 0x01000000)
     92 /*
     93  * The Kernel VM Size varies depending on the machine depending on how
     94  * much space is needed (and where) for other mappings.
     95  * In some cases the chosen value may not be the maximum in order that
     96  * we don't waste memory with kernel pages tables as we can't currently
     97  * grow the kernel page tables after booting.
     98  * You only need to increase these values if you find that the number of
     99  * buffers is being limited due to lack of VA space.
    100  */
    101 /*
    102  * The range 0xf1000000 - 0xfcffffff is available for kernel VM space
    103  * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
    104  */
    105 #define KERNEL_VM_SIZE		0x06000000
    106 #define	PROCESS_PAGE_TBLS_BASE	PAGE_TABLE_SPACE_START
    107 
    108 /*
    109  * Override the default pager_map size, there's not enough KVA.
    110  */
    111 #define PAGER_MAP_SIZE		(4 * 1024 * 1024)
    112 
    113 /*
    114  * Mach derived constants
    115  */
    116 
    117 #define	VM_MIN_ADDRESS		((vm_offset_t)0x00001000)
    118 #define	VM_MAXUSER_ADDRESS	((vm_offset_t)(PAGE_TABLE_SPACE_START - UPAGES * NBPG))
    119 #define	VM_MAX_ADDRESS		((vm_offset_t)(PAGE_TABLE_SPACE_START + (KERNEL_SPACE_START >> PGSHIFT) * sizeof(pt_entry_t)))
    120 
    121 #define	VM_MIN_KERNEL_ADDRESS	((vm_offset_t)KERNEL_TEXT_BASE)
    122 #define	VM_MAXKERN_ADDRESS	((vm_offset_t)(KERNEL_VM_BASE + KERNEL_VM_SIZE))
    123 #define	VM_MAX_KERNEL_ADDRESS	((vm_offset_t)0xffffffff)
    124 
    125 /*
    126  * Size of User Raw I/O map
    127  */
    128 
    129 #define USRIOSIZE       300
    130 
    131 /* XXX max. amount of KVM to be used by buffers. */
    132 #ifndef VM_MAX_KERNEL_BUF
    133 #define VM_MAX_KERNEL_BUF \
    134 	((VM_MAXKERN_ADDRESS - KERNEL_VM_BASE) * 4 / 10)
    135 #endif
    136 
    137 /* virtual sizes (bytes) for various kernel submaps */
    138 
    139 #define VM_PHYS_SIZE		(USRIOSIZE*NBPG)
    140 
    141 /*
    142  * max number of non-contig chunks of physical RAM you can have
    143  */
    144 
    145 #define	VM_PHYSSEG_MAX		32
    146 
    147 /*
    148  * when converting a physical address to a vm_page structure, we
    149  * want to use a binary search on the chunks of physical memory
    150  * to find our RAM
    151  */
    152 
    153 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
    154 
    155 /*
    156  * this indicates that we can't add RAM to the VM system after the
    157  * vm system is init'd.
    158  */
    159 
    160 #define	VM_PHYSSEG_NOADD
    161 
    162 /*
    163  * we support 2 free lists:
    164  *
    165  *	- DEFAULT for all systems
    166  *	- ISADMA for the ISA DMA range on Sharks only
    167  */
    168 
    169 #define	VM_NFREELIST		2
    170 #define	VM_FREELIST_DEFAULT	0
    171 #define	VM_FREELIST_ISADMA	1
    172 
    173 #endif /* _KERNEL */
    174 
    175 #endif	/* _ARM32_VMPARAM_H_ */
    176