src/system/kernel/arch/x86/paging/pae/X86PagingStructuresPAE.cpp

   1 /*
   2  * Copyright 2010, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include "paging/pae/X86PagingStructuresPAE.h"
   8
   9 #include <stdlib.h>
  10 #include <string.h>
  11
  12 #include <KernelExport.h>
  13
  14 #include <int.h>
  15
  16 #include "paging/pae/X86PagingMethodPAE.h"
  17
  18
  19 #if B_HAIKU_PHYSICAL_BITS == 64
  20
  21
  22 X86PagingStructuresPAE::X86PagingStructuresPAE()
  23         :
  24         fPageDirPointerTable(NULL)
  25 {
  26         memset(fVirtualPageDirs, 0, sizeof(fVirtualPageDirs));
  27 }
  28
  29
  30 X86PagingStructuresPAE::~X86PagingStructuresPAE()
  31 {
  32         // free the user page dirs
  33         free(fVirtualPageDirs[0]);
  34                 // There's one contiguous allocation for 0 and 1.
  35
  36         // free the PDPT page
  37         if (fPageDirPointerTable != NULL) {
  38                 X86PagingMethodPAE::Method()->Free32BitPage(fPageDirPointerTable,
  39                         pgdir_phys, fPageDirPointerTableHandle);
  40         }
  41 }
  42
  43
  44 void
  45 X86PagingStructuresPAE::Init(
  46         pae_page_directory_pointer_table_entry* virtualPDPT,
  47         phys_addr_t physicalPDPT, void* pdptHandle,
  48         pae_page_directory_entry* const* virtualPageDirs,
  49         const phys_addr_t* physicalPageDirs)
  50 {
  51         fPageDirPointerTable = virtualPDPT;
  52         pgdir_phys = physicalPDPT;
  53         fPageDirPointerTableHandle = pdptHandle;
  54         memcpy(fVirtualPageDirs, virtualPageDirs, sizeof(fVirtualPageDirs));
  55         memcpy(fPhysicalPageDirs, physicalPageDirs, sizeof(fPhysicalPageDirs));
  56 }
  57
  58
  59 void
  60 X86PagingStructuresPAE::Delete()
  61 {
  62         if (are_interrupts_enabled())
  63                 delete this;
  64         else
  65                 deferred_delete(this);
  66 }
  67
  68
  69 #endif  // B_HAIKU_PHYSICAL_BITS == 64