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pmap.h revision 1.24 
      1 /*	$NetBSD: pmap.h,v 1.24 2002/09/22 07:17:20 chs 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 /*
     40  * NetBSD/sh3 pmap:
     41  *	pmap.pm_ptp[512] ... 512 slot of page table page
     42  *	page table page contains 1024 PTEs. (PAGE_SIZE / sizeof(pt_entry_t))
     43  *	  | PTP 11bit | PTOFSET 10bit | PGOFSET 12bit |
     44  */
     45 
     46 #ifndef _SH3_PMAP_H_
     47 #define	_SH3_PMAP_H_
     48 #include <sys/queue.h>
     49 #include <sh3/pte.h>
     50 
     51 #define	PMAP_NEED_PROCWR
     52 #define	PMAP_STEAL_MEMORY
     53 #define	PMAP_GROWKERNEL
     54 
     55 #define	__PMAP_PTP_N	512	/* # of page table page maps 2GB. */
     56 typedef struct pmap {
     57 	pt_entry_t **pm_ptp;
     58 	int pm_asid;
     59 	int pm_refcnt;
     60 	struct pmap_statistics	pm_stats;	/* pmap statistics */
     61 } *pmap_t;
     62 extern struct pmap __pmap_kernel;
     63 
     64 void pmap_bootstrap(void);
     65 void pmap_procwr(struct proc *, vaddr_t, size_t);
     66 #define	pmap_kernel()			(&__pmap_kernel)
     67 #define	pmap_update(pmap)		((void)0)
     68 #define	pmap_copy(dp,sp,d,l,s)		((void)0)
     69 #define	pmap_collect(pmap)		((void)0)
     70 #define	pmap_wired_count(pmap)		((pmap)->pm_stats.wired_count)
     71 #define	pmap_resident_count(pmap)	((pmap)->pm_stats.resident_count)
     72 
     73 static __inline void
     74 pmap_remove_all(void)
     75 {
     76 	/* Nothing. */
     77 }
     78 
     79 #define	PMAP_MAP_POOLPAGE(pa)		SH3_PHYS_TO_P1SEG((pa))
     80 #define	PMAP_UNMAP_POOLPAGE(va)		SH3_P1SEG_TO_PHYS((va))
     81 
     82 /* MD pmap utils. */
     83 pt_entry_t *__pmap_pte_lookup(pmap_t, vaddr_t);
     84 pt_entry_t *__pmap_kpte_lookup(vaddr_t);
     85 boolean_t __pmap_pte_load(pmap_t, vaddr_t, int);
     86 #endif /* !_SH3_PMAP_H_ */
     87