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arm_mmu.h revision 1.2 
      1 /* -*-C++-*-	$NetBSD: arm_mmu.h,v 1.2 2004/08/06 18:33:09 uch 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  * 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 _HPCBOOT_ARM_MMU_H_
     40 #define	_HPCBOOT_ARM_MMU_H_
     41 
     42 #include <arm/arm_arch.h>
     43 #include <memory.h>
     44 
     45 #define	ARM_MMU_TABLEBASE_MASK				0xffffc000
     46 #define	ARM_MMU_TABLEINDEX_MASK				0x00003ffc
     47 #define	ARM_MMU_VADDR_TABLE_INDEX_MASK			0xfff00000
     48 #define	ARM_MMU_TABLEINDEX_SHIFT			18
     49 #define	ARM_MMU_TABLEINDEX(x)						\
     50 	((((x) & ARM_MMU_VADDR_TABLE_INDEX_MASK) >>			\
     51 	 ARM_MMU_TABLEINDEX_SHIFT) & ARM_MMU_TABLEINDEX_MASK)
     52 
     53 /*
     54  * 1st level descriptor
     55  */
     56 #define	ARM_MMU_LEVEL1DESC_TRANSLATE_TYPE_MASK		0x3
     57 #define	ARM_MMU_LEVEL1DESC_TRANSLATE_TYPE(x)				\
     58 	((x) & ARM_MMU_LEVEL1DESC_TRANSLATE_TYPE_MASK)
     59 #define	ARM_MMU_LEVEL1DESC_TRANSLATE_SECTION		0x2
     60 #define	ARM_MMU_LEVEL1DESC_TRANSLATE_PAGE		0x1
     61 
     62 /*
     63  * Section translation
     64  */
     65 #define	ARM_MMU_SECTION_BASE_MASK			0xfff00000
     66 #define	ARM_MMU_SECTION_BASE(x)						\
     67 	((x) & ARM_MMU_SECTION_BASE_MASK)
     68 #define	ARM_MMU_VADDR_SECTION_INDEX_MASK		0x000fffff
     69 #define	ARM_MMU_VADDR_SECTION_INDEX(x)					\
     70 	((x) & ARM_MMU_VADDR_SECTION_INDEX_MASK)
     71 /*
     72  * Page translation
     73  */
     74 #define	ARM_MMU_PTE_BASE_MASK				0xfffffc00
     75 #define	ARM_MMU_PTE_BASE(x)	((x) & ARM_MMU_PTE_BASE_MASK)
     76 #define	ARM_MMU_VADDR_PTE_INDEX_MASK			0x000003fc
     77 #define	ARM_MMU_VADDR_PTE_INDEX_SHIFT			10
     78 #define	ARM_MMU_VADDR_PTE_INDEX(x)					\
     79 	(((x) >> ARM_MMU_VADDR_PTE_INDEX_SHIFT) &			\
     80 	ARM_MMU_VADDR_PTE_INDEX_MASK)
     81 
     82 class MemoryManager_ArmMMU : public MemoryManager {
     83 private:
     84 	BOOL _kmode;
     85 	paddr_t _table_base;
     86 
     87 public:
     88 	MemoryManager_ArmMMU(Console *&, size_t);
     89 	virtual ~MemoryManager_ArmMMU();
     90 	BOOL init(void);
     91 	paddr_t searchPage(vaddr_t vaddr);
     92 };
     93 
     94 #endif // _HPCBOOT_ARM_MMU_H_
     95