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- Initialize the page directory for a new process from global kernel page directory in MmCopyMmInfo.
- Check for kernel or user space in MmIsAccessedAndResetAcessPage/MmSetCleanPage/MmSetDirtyPage. - Added InitGlobalKernelPageDirectory. svn path=/trunk/; revision=4700
This commit is contained in:
Hartmut Birr
parent
fd4d79b7fd
commit
f5048a6a3b
3 changed files with 81 additions and 29 deletions
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@ -293,7 +293,6 @@ PVOID MmFindGap(PMADDRESS_SPACE AddressSpace, ULONG Length);
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VOID ExUnmapPage(PVOID Addr);
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PVOID ExAllocatePage(VOID);
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VOID MmInitPagingFile(VOID);
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BOOLEAN MmReserveSwapPages(ULONG Nr);
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VOID MmDereserveSwapPages(ULONG Nr);
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SWAPENTRY MmAllocSwapPage(VOID);
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@ -467,6 +466,8 @@ VOID MmSetPageProtect(struct _EPROCESS* Process,
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BOOLEAN MmIsPagePresent(struct _EPROCESS* Process,
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PVOID Address);
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VOID MmInitGlobalKernelPageDirectory(VOID);
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/* Memory balancing. */
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VOID
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MmInitializeMemoryConsumer(ULONG Consumer,
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@ -16,7 +16,7 @@
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: page.c,v 1.49 2003/05/08 05:26:36 gvg Exp $
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/* $Id: page.c,v 1.50 2003/05/17 13:45:04 hbirr Exp $
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*
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/mm/i386/page.c
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@ -135,9 +135,7 @@ NTSTATUS MmCopyMmInfo(PEPROCESS Src, PEPROCESS Dest)
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{
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PHYSICAL_ADDRESS PhysPageDirectory;
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PULONG PageDirectory;
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PULONG CurrentPageDirectory;
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PKPROCESS KProcess = &Dest->Pcb;
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ULONG i;
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DPRINT("MmCopyMmInfo(Src %x, Dest %x)\n", Src, Dest);
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@ -148,17 +146,12 @@ NTSTATUS MmCopyMmInfo(PEPROCESS Src, PEPROCESS Dest)
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}
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PhysPageDirectory = MmGetPhysicalAddress(PageDirectory);
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KProcess->DirectoryTableBase = PhysPageDirectory;
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CurrentPageDirectory = (PULONG)PAGEDIRECTORY_MAP;
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memset(PageDirectory,0,PAGE_SIZE);
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for (i=768; i<896; i++)
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{
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PageDirectory[i] = CurrentPageDirectory[i];
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}
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for (i=961; i<1024; i++)
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{
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PageDirectory[i] = CurrentPageDirectory[i];
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}
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memset(PageDirectory,0, ADDR_TO_PDE_OFFSET(KERNEL_BASE) * sizeof(ULONG));
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memcpy(PageDirectory + ADDR_TO_PDE_OFFSET(KERNEL_BASE),
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MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(KERNEL_BASE),
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(1024 - ADDR_TO_PDE_OFFSET(KERNEL_BASE)) * sizeof(ULONG));
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DPRINT("Addr %x\n",PAGETABLE_MAP / (4*1024*1024));
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PageDirectory[PAGETABLE_MAP / (4*1024*1024)] =
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PhysPageDirectory.u.LowPart | PA_PRESENT | PA_READWRITE;
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@ -805,13 +798,27 @@ BOOLEAN
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MmIsAccessedAndResetAccessPage(PEPROCESS Process, PVOID Address)
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{
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PULONG PageEntry;
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PEPROCESS CurrentProcess = PsGetCurrentProcess();
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PEPROCESS CurrentProcess;
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BOOLEAN Accessed;
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if (Process != CurrentProcess)
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if (Process)
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{
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KeAttachProcess(Process);
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CurrentProcess = PsGetCurrentProcess();
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if (Process != CurrentProcess)
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{
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KeAttachProcess(Process);
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}
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}
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else
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{
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if (((ULONG)Address & ~0xFFF) < KERNEL_BASE)
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{
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DPRINT1("MmIsAccessedAndResetAccessPage is called for user space without a process.\n");
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KeBugCheck(0);
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}
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CurrentProcess = NULL;
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}
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PageEntry = MmGetPageEntry(Address);
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Accessed = (*PageEntry) & PA_ACCESSED;
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if (Accessed)
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@ -830,11 +837,24 @@ MmIsAccessedAndResetAccessPage(PEPROCESS Process, PVOID Address)
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VOID MmSetCleanPage(PEPROCESS Process, PVOID Address)
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{
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PULONG PageEntry;
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PEPROCESS CurrentProcess = PsGetCurrentProcess();
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if (Process != CurrentProcess)
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PEPROCESS CurrentProcess;
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if (Process)
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{
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KeAttachProcess(Process);
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CurrentProcess = PsGetCurrentProcess();
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if (Process != CurrentProcess)
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{
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KeAttachProcess(Process);
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}
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}
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else
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{
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if (((ULONG)Address & ~0xFFF) < KERNEL_BASE)
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{
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DPRINT1("MmSetCleanPage is called for user space without a process.\n");
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KeBugCheck(0);
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}
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CurrentProcess = NULL;
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}
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PageEntry = MmGetPageEntry(Address);
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(*PageEntry) = (*PageEntry) & (~PA_DIRTY);
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@ -848,11 +868,24 @@ VOID MmSetCleanPage(PEPROCESS Process, PVOID Address)
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VOID MmSetDirtyPage(PEPROCESS Process, PVOID Address)
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{
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PULONG PageEntry;
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PEPROCESS CurrentProcess = PsGetCurrentProcess();
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if (Process != CurrentProcess)
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PEPROCESS CurrentProcess = NULL;
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if (Process)
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{
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KeAttachProcess(Process);
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CurrentProcess = PsGetCurrentProcess();
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if (Process != CurrentProcess)
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{
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KeAttachProcess(Process);
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}
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}
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else
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{
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if (((ULONG)Address & ~0xFFF) < KERNEL_BASE)
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{
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DPRINT1("MmSetDirtyPage is called for user space without a process.\n");
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KeBugCheck(0);
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}
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CurrentProcess = NULL;
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}
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PageEntry = MmGetPageEntry(Address);
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(*PageEntry) = (*PageEntry) | PA_DIRTY;
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@ -950,7 +983,7 @@ MmCreateVirtualMappingForKernel(PVOID Address,
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*Pte = PhysicalAddress.QuadPart | Attributes;
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if (Process != NULL &&
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Process->AddressSpace.PageTableRefCountTable != NULL &&
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ADDR_TO_PAGE_TABLE(Address) < 768 &&
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Address < (PVOID)KERNEL_BASE &&
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Attributes & PA_PRESENT)
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{
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PUSHORT Ptrc;
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@ -1021,7 +1054,7 @@ MmCreatePageFileMapping(PEPROCESS Process,
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*Pte = SwapEntry << 1;
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if (Process != NULL &&
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Process->AddressSpace.PageTableRefCountTable != NULL &&
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ADDR_TO_PAGE_TABLE(Address) < 768)
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Address < (PVOID)KERNEL_BASE)
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{
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PUSHORT Ptrc;
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@ -1104,7 +1137,7 @@ MmCreateVirtualMappingUnsafe(PEPROCESS Process,
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*Pte = PhysicalAddress.QuadPart | Attributes;
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if (Process != NULL &&
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Process->AddressSpace.PageTableRefCountTable != NULL &&
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ADDR_TO_PAGE_TABLE(Address) < 768 &&
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Address < (PVOID)KERNEL_BASE &&
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Attributes & PA_PRESENT)
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{
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PUSHORT Ptrc;
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@ -1224,4 +1257,20 @@ MmUpdatePageDir(PULONG LocalPageDir, PVOID Address)
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}
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}
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VOID
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MmInitGlobalKernelPageDirectory(VOID)
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{
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ULONG i;
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PULONG CurrentPageDirectory = (PULONG)PAGEDIRECTORY_MAP;
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for (i = ADDR_TO_PDE_OFFSET(KERNEL_BASE); i < 1024; i++)
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{
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if (i != ADDR_TO_PDE_OFFSET(PAGETABLE_MAP) &&
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0 == MmGlobalKernelPageDirectory[i] && 0 != CurrentPageDirectory[i])
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{
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MmGlobalKernelPageDirectory[i] = CurrentPageDirectory[i];
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}
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}
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}
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/* EOF */
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@ -1,4 +1,4 @@
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/* $Id: mminit.c,v 1.43 2003/01/11 15:26:59 hbirr Exp $
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/* $Id: mminit.c,v 1.44 2003/05/17 13:45:04 hbirr Exp $
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*
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* COPYRIGHT: See COPYING in the top directory
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* PROJECT: ReactOS kernel
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@ -219,6 +219,8 @@ VOID MmInit1(ULONG FirstKrnlPhysAddr,
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LastKrnlPhysAddr,
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LastKernelAddress);
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MmInitGlobalKernelPageDirectory();
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if ((BIOSMemoryMap != NULL) && (AddressRangeCount > 0))
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{
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// If we have a bios memory map, recalulate the the memory size
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