pmap.h revision 1.32 
1/*	$NetBSD: pmap.h,v 1.32 2008/04/28 20:23:35 martin 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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * NetBSD/sh3 pmap:
34 *	pmap.pm_ptp[512] ... 512 slot of page table page
35 *	page table page contains 1024 PTEs. (PAGE_SIZE / sizeof(pt_entry_t))
36 *	va -> [ PTP 10bit | PTOFSET 10bit | PGOFSET 12bit ]
37 */
38
39#ifndef _SH3_PMAP_H_
40#define	_SH3_PMAP_H_
41#include <sys/queue.h>
42#include <sh3/pte.h>
43
44#define	PMAP_NEED_PROCWR
45#define	PMAP_STEAL_MEMORY
46#define	PMAP_GROWKERNEL
47
48#define	__PMAP_PTP_N	512	/* # of page table page maps 2GB. */
49typedef struct pmap {
50	pt_entry_t **pm_ptp;
51	int pm_asid;
52	int pm_refcnt;
53	struct pmap_statistics	pm_stats;	/* pmap statistics */
54} *pmap_t;
55extern struct pmap __pmap_kernel;
56
57void pmap_bootstrap(void);
58void pmap_procwr(struct proc *, vaddr_t, size_t);
59#define	pmap_kernel()			(&__pmap_kernel)
60#define	pmap_update(pmap)		((void)0)
61#define	pmap_copy(dp,sp,d,l,s)		((void)0)
62#define	pmap_collect(pmap)		((void)0)
63#define	pmap_wired_count(pmap)		((pmap)->pm_stats.wired_count)
64#define	pmap_resident_count(pmap)	((pmap)->pm_stats.resident_count)
65
66/* ARGSUSED */
67static __inline void
68pmap_remove_all(struct pmap *pmap)
69{
70	/* Nothing. */
71}
72
73/*
74 * pmap_prefer() helps to avoid virtual cache aliases on SH4 CPUs
75 * which have the virtually-indexed cache.
76 */
77#ifdef SH4
78#define PMAP_PREFER(pa, va, sz, td)     pmap_prefer((pa), (va))
79void pmap_prefer(vaddr_t, vaddr_t *);
80#endif /* SH4 */
81
82#define	PMAP_MAP_POOLPAGE(pa)		SH3_PHYS_TO_P1SEG((pa))
83#define	PMAP_UNMAP_POOLPAGE(va)		SH3_P1SEG_TO_PHYS((va))
84
85/* MD pmap utils. */
86pt_entry_t *__pmap_pte_lookup(pmap_t, vaddr_t);
87pt_entry_t *__pmap_kpte_lookup(vaddr_t);
88bool __pmap_pte_load(pmap_t, vaddr_t, int);
89#endif /* !_SH3_PMAP_H_ */
90