1 /* -*-C++-*- $NetBSD: arm_mmu.h,v 1.1 2001/02/09 18:34:55 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