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vmparam.h revision 1.3 
      1 /*	$NetBSD: vmparam.h,v 1.3 2003/04/01 23:52:35 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
      5  * Copyright (C) 1995, 1996 TooLs GmbH.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by TooLs GmbH.
     19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #ifndef _MACHINE_VMPARAM_H_
     35 #define _MACHINE_VMPARAM_H_
     36 
     37 /*
     38  * We use 16K pages on IBM4xx CPUs.  Override the PAGE_* definitions
     39  * to be compile-time constants.
     40  */
     41 #define	PAGE_SHIFT	14
     42 #define	PAGE_SIZE	(1 << PAGE_SHIFT)
     43 #define	PAGE_MASK	(PAGE_SIZE - 1)
     44 
     45 #define	USRSTACK	VM_MAXUSER_ADDRESS
     46 
     47 #ifndef	MAXTSIZ
     48 #define	MAXTSIZ		(64*1024*1024)		/* max text size */
     49 #endif
     50 
     51 #ifndef	DFLDSIZ
     52 #define	DFLDSIZ		(128*1024*1024)		/* default data size */
     53 #endif
     54 
     55 #ifndef	MAXDSIZ
     56 #define	MAXDSIZ		(1*1024*1024*1024)	/* max data size */
     57 #endif
     58 
     59 #ifndef	DFLSSIZ
     60 #define	DFLSSIZ		(2*1024*1024)		/* default stack size */
     61 #endif
     62 
     63 #ifndef	MAXSSIZ
     64 #define	MAXSSIZ		(32*1024*1024)		/* max stack size */
     65 #endif
     66 
     67 /*
     68  * Size of shared memory map
     69  */
     70 #ifndef	SHMMAXPGS
     71 #define	SHMMAXPGS	1024
     72 #endif
     73 
     74 /*
     75  * Size of User Raw I/O map
     76  */
     77 #define	USRIOSIZE	1024
     78 
     79 #if 1
     80 /*
     81  * These definitions give you a 2GB kernel VA space.  The other set matches
     82  * the way other PPC ports lay out their 256MB kernel address space.
     83  */
     84 #define	VM_MIN_ADDRESS		((vaddr_t)0)
     85 #define	VM_MAXUSER_ADDRESS	((vaddr_t)0xffff0000-NBPG)
     86 #define	VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
     87 #define	VM_MIN_KERNEL_ADDRESS	((vaddr_t)0x80000000)
     88 #define	VM_MAX_KERNEL_ADDRESS	((vaddr_t)0xff000000)
     89 #else
     90 /*
     91  * Would like to have MAX addresses = 0, but this doesn't (currently) work
     92  */
     93 #define	VM_MIN_ADDRESS		((vaddr_t)0)
     94 #define	VM_MAXUSER_ADDRESS	((vaddr_t)0x80000000-NBPG)
     95 #define	VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
     96 #define	VM_MIN_KERNEL_ADDRESS	((vaddr_t)(KERNEL_SR << ADDR_SR_SHFT))
     97 #define	VM_MAX_KERNEL_ADDRESS	(VM_MIN_KERNEL_ADDRESS + SEGMENT_LENGTH - 1)
     98 #endif
     99 
    100 /* XXX max. amount of KVM to be used by buffers. */
    101 #ifndef VM_MAX_KERNEL_BUF
    102 #define VM_MAX_KERNEL_BUF	(0x10000000 * 7 / 10)
    103 
    104 /*
    105  * Override the default pager_map size, there's not enough KVA.
    106  */
    107 #define PAGER_MAP_SIZE		(4 * 1024 * 1024)
    108 #endif
    109 
    110 #define	VM_PHYS_SIZE		(USRIOSIZE * NBPG)
    111 
    112 #define	__HAVE_PMAP_PHYSSEG
    113 
    114 struct pmap_physseg {
    115 	struct pv_entry *pvent;
    116 	char *attrs;
    117 };
    118 
    119 #define VM_PHYSSEG_MAX		16	/* 1? */
    120 #define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
    121 #define VM_PHYSSEG_NOADD		/* can't add RAM after vm_mem_init */
    122 
    123 #define	VM_NFREELIST		1
    124 #define	VM_FREELIST_DEFAULT	0
    125 
    126 #endif /* _MACHINE_VMPARAM_H_ */
    127