1/* -*-C++-*-	$NetBSD: arm_mmu.h,v 1.3 2005/12/11 12:17:28 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2001 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#ifndef _HPCBOOT_ARM_MMU_H_
33#define	_HPCBOOT_ARM_MMU_H_
34
35#include <arm/arm_arch.h>
36#include <memory.h>
37
38#define	ARM_MMU_TABLEBASE_MASK				0xffffc000
39#define	ARM_MMU_TABLEINDEX_MASK				0x00003ffc
40#define	ARM_MMU_VADDR_TABLE_INDEX_MASK			0xfff00000
41#define	ARM_MMU_TABLEINDEX_SHIFT			18
42#define	ARM_MMU_TABLEINDEX(x)						\
43	((((x) & ARM_MMU_VADDR_TABLE_INDEX_MASK) >>			\
44	 ARM_MMU_TABLEINDEX_SHIFT) & ARM_MMU_TABLEINDEX_MASK)
45
46/*
47 * 1st level descriptor
48 */
49#define	ARM_MMU_LEVEL1DESC_TRANSLATE_TYPE_MASK		0x3
50#define	ARM_MMU_LEVEL1DESC_TRANSLATE_TYPE(x)				\
51	((x) & ARM_MMU_LEVEL1DESC_TRANSLATE_TYPE_MASK)
52#define	ARM_MMU_LEVEL1DESC_TRANSLATE_SECTION		0x2
53#define	ARM_MMU_LEVEL1DESC_TRANSLATE_PAGE		0x1
54
55/*
56 * Section translation
57 */
58#define	ARM_MMU_SECTION_BASE_MASK			0xfff00000
59#define	ARM_MMU_SECTION_BASE(x)						\
60	((x) & ARM_MMU_SECTION_BASE_MASK)
61#define	ARM_MMU_VADDR_SECTION_INDEX_MASK		0x000fffff
62#define	ARM_MMU_VADDR_SECTION_INDEX(x)					\
63	((x) & ARM_MMU_VADDR_SECTION_INDEX_MASK)
64/*
65 * Page translation
66 */
67#define	ARM_MMU_PTE_BASE_MASK				0xfffffc00
68#define	ARM_MMU_PTE_BASE(x)	((x) & ARM_MMU_PTE_BASE_MASK)
69#define	ARM_MMU_VADDR_PTE_INDEX_MASK			0x000003fc
70#define	ARM_MMU_VADDR_PTE_INDEX_SHIFT			10
71#define	ARM_MMU_VADDR_PTE_INDEX(x)					\
72	(((x) >> ARM_MMU_VADDR_PTE_INDEX_SHIFT) &			\
73	ARM_MMU_VADDR_PTE_INDEX_MASK)
74
75class MemoryManager_ArmMMU : public MemoryManager {
76private:
77	BOOL _kmode;
78	paddr_t _table_base;
79
80public:
81	MemoryManager_ArmMMU(Console *&, size_t);
82	virtual ~MemoryManager_ArmMMU();
83	BOOL init(void);
84	paddr_t searchPage(vaddr_t vaddr);
85};
86
87#endif // _HPCBOOT_ARM_MMU_H_
88