1/* 2 * Copyright 2008-2010, Ingo Weinhold, ingo_weinhold@gmx.de. 3 * Copyright 2002-2007, Axel D��rfler, axeld@pinc-software.de. All rights reserved. 4 * Distributed under the terms of the MIT License. 5 * 6 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 7 * Distributed under the terms of the NewOS License. 8 */ 9 10 11#include "paging/classic/PPCPagingStructuresClassic.h" 12 13#include <stdlib.h> 14 15#include <heap.h> 16#include <util/AutoLock.h> 17 18 19// Accessor class to reuse the SinglyLinkedListLink of DeferredDeletable for 20// PPCPagingStructuresClassic. 21struct PagingStructuresGetLink { 22private: 23 typedef SinglyLinkedListLink<PPCPagingStructuresClassic> Link; 24 25public: 26 inline Link* operator()(PPCPagingStructuresClassic* element) const 27 { 28 return (Link*)element->GetSinglyLinkedListLink(); 29 } 30 31 inline const Link* operator()( 32 const PPCPagingStructuresClassic* element) const 33 { 34 return (const Link*)element->GetSinglyLinkedListLink(); 35 } 36}; 37 38 39typedef SinglyLinkedList<PPCPagingStructuresClassic, PagingStructuresGetLink> 40 PagingStructuresList; 41 42 43static PagingStructuresList sPagingStructuresList; 44static spinlock sPagingStructuresListLock; 45 46 47PPCPagingStructuresClassic::PPCPagingStructuresClassic() 48/* : 49 pgdir_virt(NULL)*/ 50{ 51} 52 53 54PPCPagingStructuresClassic::~PPCPagingStructuresClassic() 55{ 56#if 0//X86 57 // free the page dir 58 free(pgdir_virt); 59#endif 60} 61 62 63void 64PPCPagingStructuresClassic::Init(/*page_directory_entry* virtualPageDir, 65 phys_addr_t physicalPageDir, page_directory_entry* kernelPageDir*/ 66 page_table_entry_group *pageTable) 67{ 68// pgdir_virt = virtualPageDir; 69// pgdir_phys = physicalPageDir; 70 71#if 0//X86 72 // zero out the bottom portion of the new pgdir 73 memset(pgdir_virt + FIRST_USER_PGDIR_ENT, 0, 74 NUM_USER_PGDIR_ENTS * sizeof(page_directory_entry)); 75#endif 76 77 // insert this new map into the map list 78 { 79 int state = disable_interrupts(); 80 acquire_spinlock(&sPagingStructuresListLock); 81 82#if 0//X86 83 // copy the top portion of the page dir from the kernel page dir 84 if (kernelPageDir != NULL) { 85 memcpy(pgdir_virt + FIRST_KERNEL_PGDIR_ENT, 86 kernelPageDir + FIRST_KERNEL_PGDIR_ENT, 87 NUM_KERNEL_PGDIR_ENTS * sizeof(page_directory_entry)); 88 } 89#endif 90 91 sPagingStructuresList.Add(this); 92 93 release_spinlock(&sPagingStructuresListLock); 94 restore_interrupts(state); 95 } 96} 97 98 99void 100PPCPagingStructuresClassic::Delete() 101{ 102 // remove from global list 103 InterruptsSpinLocker locker(sPagingStructuresListLock); 104 sPagingStructuresList.Remove(this); 105 locker.Unlock(); 106 107#if 0 108 // this sanity check can be enabled when corruption due to 109 // overwriting an active page directory is suspected 110 uint32 activePageDirectory = x86_read_cr3(); 111 if (activePageDirectory == pgdir_phys) 112 panic("deleting a still active page directory\n"); 113#endif 114 115 if (are_interrupts_enabled()) 116 delete this; 117 else 118 deferred_delete(this); 119} 120 121 122/*static*/ void 123PPCPagingStructuresClassic::StaticInit() 124{ 125 B_INITIALIZE_SPINLOCK(&sPagingStructuresListLock); 126 new (&sPagingStructuresList) PagingStructuresList; 127} 128 129 130/*static*/ void 131PPCPagingStructuresClassic::UpdateAllPageDirs(int index, 132 page_table_entry_group entry) 133//XXX:page_table_entry? 134{ 135 InterruptsSpinLocker locker(sPagingStructuresListLock); 136#if 0//X86 137 PagingStructuresList::Iterator it = sPagingStructuresList.GetIterator(); 138 while (PPCPagingStructuresClassic* info = it.Next()) 139 info->pgdir_virt[index] = entry; 140#endif 141} 142