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vmparam.h revision 1.16 
      1 /*	$NetBSD: vmparam.h,v 1.16 2003/04/02 07:36:03 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _SH3_VMPARAM_H_
     40 #define	_SH3_VMPARAM_H_
     41 #include <sys/queue.h>
     42 
     43 /*
     44  * We use 4K pages on the sh3/sh4.  Override the PAGE_* definitions
     45  * to be compile-time constants.
     46  */
     47 #define	PAGE_SHIFT	12
     48 #define	PAGE_SIZE	(1 << PAGE_SHIFT)
     49 #define	PAGE_MASK	(PAGE_SIZE - 1)
     50 
     51 /* Virtual address map. */
     52 #define	VM_MIN_ADDRESS		((vaddr_t)0)
     53 #define	VM_MAXUSER_ADDRESS	((vaddr_t)0x7ffff000)
     54 #define	VM_MAX_ADDRESS		((vaddr_t)0x7ffff000)
     55 #define	VM_MIN_KERNEL_ADDRESS	((vaddr_t)0xc0000000)
     56 #define	VM_MAX_KERNEL_ADDRESS	((vaddr_t)0xe0000000)
     57 
     58 /* top of stack */
     59 #define	USRSTACK		VM_MAXUSER_ADDRESS
     60 
     61 /* Virtual memory resoruce limit. */
     62 #define	MAXTSIZ			(64 * 1024 * 1024)	/* max text size */
     63 #ifndef MAXDSIZ
     64 #define	MAXDSIZ			(512 * 1024 * 1024)	/* max data size */
     65 #endif
     66 #ifndef	MAXSSIZ
     67 #define	MAXSSIZ			(32 * 1024 * 1024)	/* max stack size */
     68 #endif
     69 
     70 /* initial data size limit */
     71 #ifndef DFLDSIZ
     72 #define	DFLDSIZ			(128 * 1024 * 1024)
     73 #endif
     74 /* initial stack size limit */
     75 #ifndef	DFLSSIZ
     76 #define	DFLSSIZ			(2 * 1024 * 1024)
     77 #endif
     78 
     79 /*
     80  * Size of shared memory map
     81  */
     82 #ifndef SHMMAXPGS
     83 #define	SHMMAXPGS		1024
     84 #endif
     85 
     86 /* Size of user raw I/O map */
     87 #ifndef USRIOSIZE
     88 #define	USRIOSIZE		(MAXBSIZE / PAGE_SIZE * 8)
     89 #endif
     90 
     91 #define	VM_PHYS_SIZE		(USRIOSIZE * PAGE_SIZE)
     92 
     93 /* Physical memory segments */
     94 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
     95 #define	VM_PHYSSEG_NOADD
     96 
     97 #define	sh3_round_page(x)	((((u_int32_t)(x)) + PGOFSET) & ~PGOFSET)
     98 #define	sh3_trunc_page(x)	((u_int32_t)(x) & ~PGOFSET)
     99 #define	sh3_btop(x)		((u_int32_t)(x) >> PGSHIFT)
    100 #define	sh3_ptob(x)		((u_int32_t)(x) << PGSHIFT)
    101 
    102 /* pmap-specific data store in the vm_page structure. */
    103 #define	__HAVE_VM_PAGE_MD
    104 #define	PVH_REFERENCED		1
    105 #define	PVH_MODIFIED		2
    106 
    107 #ifndef _LOCORE
    108 struct pv_entry;
    109 struct vm_page_md {
    110 	SLIST_HEAD(, pv_entry) pvh_head;
    111 	int pvh_flags;
    112 };
    113 
    114 #define	VM_MDPAGE_INIT(pg)						\
    115 do {									\
    116 	struct vm_page_md *pvh = &(pg)->mdpage;				\
    117 	SLIST_INIT(&pvh->pvh_head);					\
    118 	pvh->pvh_flags = 0;						\
    119 } while (/*CONSTCOND*/0)
    120 #endif /* _LOCORE */
    121 #endif /* !_SH3_VMPARAM_H_ */
    122