1 /* 2 * Copyright 2010, Ithamar R. Adema, ithamar.adema@team-embedded.nl 3 * Copyright 2008-2010, Ingo Weinhold, ingo_weinhold@gmx.de. 4 * Copyright 2002-2007, Axel Dörfler, axeld@pinc-software.de. All rights reserved. 5 * Distributed under the terms of the MIT License. 6 * 7 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 8 * Distributed under the terms of the NewOS License. 9 */ 10 11 12 #include <arch/vm_translation_map.h> 13 14 #include <boot/kernel_args.h> 15 16 #include "paging/32bit/ARMPagingMethod32Bit.h" 17 //#include "paging/pae/ARMPagingMethodPAE.h" 18 19 20 //#define TRACE_VM_TMAP 21 #ifdef TRACE_VM_TMAP 22 # define TRACE(x...) dprintf(x) 23 #else 24 # define TRACE(x...) ; 25 #endif 26 27 28 static union { 29 uint64 align; 30 char thirty_two[sizeof(ARMPagingMethod32Bit)]; 31 #if B_HAIKU_PHYSICAL_BITS == 64 32 char pae[sizeof(ARMPagingMethodPAE)]; 33 #endif 34 } sPagingMethodBuffer; 35 36 37 // #pragma mark - VM API 38 39 40 status_t 41 arch_vm_translation_map_create_map(bool kernel, VMTranslationMap** _map) 42 { 43 return gARMPagingMethod->CreateTranslationMap(kernel, _map); 44 } 45 46 47 status_t 48 arch_vm_translation_map_init(kernel_args *args, 49 VMPhysicalPageMapper** _physicalPageMapper) 50 { 51 TRACE("vm_translation_map_init: entry\n"); 52 53 #ifdef TRACE_VM_TMAP 54 TRACE("physical memory ranges:\n"); 55 for (uint32 i = 0; i < args->num_physical_memory_ranges; i++) { 56 phys_addr_t start = args->physical_memory_range[i].start; 57 phys_addr_t end = start + args->physical_memory_range[i].size; 58 TRACE(" %#10" B_PRIxPHYSADDR " - %#10" B_PRIxPHYSADDR "\n", start, 59 end); 60 } 61 62 TRACE("allocated physical ranges:\n"); 63 for (uint32 i = 0; i < args->num_physical_allocated_ranges; i++) { 64 phys_addr_t start = args->physical_allocated_range[i].start; 65 phys_addr_t end = start + args->physical_allocated_range[i].size; 66 TRACE(" %#10" B_PRIxPHYSADDR " - %#10" B_PRIxPHYSADDR "\n", start, 67 end); 68 } 69 70 TRACE("allocated virtual ranges:\n"); 71 for (uint32 i = 0; i < args->num_virtual_allocated_ranges; i++) { 72 addr_t start = args->virtual_allocated_range[i].start; 73 addr_t end = start + args->virtual_allocated_range[i].size; 74 TRACE(" %#10" B_PRIxADDR " - %#10" B_PRIxADDR "\n", start, end); 75 } 76 #endif 77 78 //TODO: check for LPAE / long-descriptor format 79 //for now only short-descriptor format is implemented 80 gARMPagingMethod = new(&sPagingMethodBuffer) ARMPagingMethod32Bit; 81 82 return gARMPagingMethod->Init(args, _physicalPageMapper); 83 } 84 85 86 status_t 87 arch_vm_translation_map_init_post_sem(kernel_args *args) 88 { 89 return B_OK; 90 } 91 92 93 status_t 94 arch_vm_translation_map_init_post_area(kernel_args *args) 95 { 96 TRACE("vm_translation_map_init_post_area: entry\n"); 97 98 return gARMPagingMethod->InitPostArea(args); 99 } 100 101 102 status_t 103 arch_vm_translation_map_early_map(kernel_args *args, addr_t va, phys_addr_t pa, 104 uint8 attributes, phys_addr_t (*get_free_page)(kernel_args *)) 105 { 106 TRACE("early_tmap: entry pa 0x%lx va 0x%lx\n", pa, va); 107 108 return gARMPagingMethod->MapEarly(args, va, pa, attributes, get_free_page); 109 } 110 111 112 /*! Verifies that the page at the given virtual address can be accessed in the 113 current context. 114 115 This function is invoked in the kernel debugger. Paranoid checking is in 116 order. 117 118 \param virtualAddress The virtual address to be checked. 119 \param protection The area protection for which to check. Valid is a bitwise 120 or of one or more of \c B_KERNEL_READ_AREA or \c B_KERNEL_WRITE_AREA. 121 \return \c true, if the address can be accessed in all ways specified by 122 \a protection, \c false otherwise. 123 */ 124 bool 125 arch_vm_translation_map_is_kernel_page_accessible(addr_t virtualAddress, 126 uint32 protection) 127 { 128 if (!gARMPagingMethod) 129 return true; 130 131 return gARMPagingMethod->IsKernelPageAccessible(virtualAddress, protection); 132 } 133