pmap.h revision 1.29 
1/*	$NetBSD: pmap.h,v 1.29 2006/09/24 00:43:44 tsutsui 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. */
56typedef 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;
62extern struct pmap __pmap_kernel;
63
64void pmap_bootstrap(void);
65void 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/* ARGSUSED */
74static __inline void
75pmap_remove_all(struct pmap *pmap)
76{
77	/* Nothing. */
78}
79
80/*
81 * pmap_prefer() helps to avoid virtual cache aliases on SH4 CPUs
82 * which have the virtually-indexed cache.
83 */
84#ifdef SH4
85#define PMAP_PREFER(pa, va, sz, td)     pmap_prefer((pa), (va))
86void pmap_prefer(vaddr_t, vaddr_t *);
87#endif /* SH4 */
88
89#define	PMAP_MAP_POOLPAGE(pa)		SH3_PHYS_TO_P1SEG((pa))
90#define	PMAP_UNMAP_POOLPAGE(va)		SH3_P1SEG_TO_PHYS((va))
91
92/* MD pmap utils. */
93pt_entry_t *__pmap_pte_lookup(pmap_t, vaddr_t);
94pt_entry_t *__pmap_kpte_lookup(vaddr_t);
95boolean_t __pmap_pte_load(pmap_t, vaddr_t, int);
96#endif /* !_SH3_PMAP_H_ */
97