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https://github.com/reactos/reactos.git
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Remove more dead code from MmInit1. This nugget was trying to free memory allocations between 0x80F50000 and 0x80600000?
[FORMATTING] Make MmInitializePageList readable by human beings. Remove code in MmInitializePageList which was just repeating what MmInit1 had already done (why?). Remove alignment code which was duplicated (why??). svn path=/trunk/; revision=32354
This commit is contained in:
ReactOS Portable Systems Group
parent
ad3e1b7948
commit
7ea9f649ca
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@ -319,247 +319,216 @@ MmInitializePageList(ULONG_PTR FirstPhysKernelAddress,
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ULONG_PTR LastKernelAddress,
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PADDRESS_RANGE BIOSMemoryMap,
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ULONG AddressRangeCount)
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/*
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* FUNCTION: Initializes the page list with all pages free
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* except those known to be reserved and those used by the kernel
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* ARGUMENTS:
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* FirstKernelAddress = First physical address used by the kernel
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* LastKernelAddress = Last physical address used by the kernel
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*/
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{
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ULONG i;
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ULONG Reserved;
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NTSTATUS Status;
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PFN_TYPE LastPage;
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PFN_TYPE FirstUninitializedPage;
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ULONG PdeStart = PsGetCurrentProcess()->Pcb.DirectoryTableBase.LowPart;
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ULONG i;
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ULONG Reserved;
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NTSTATUS Status;
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PFN_TYPE LastPage;
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PFN_TYPE FirstUninitializedPage;
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ULONG PdeStart = PsGetCurrentProcess()->Pcb.DirectoryTableBase.LowPart;
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KeInitializeSpinLock(&PageListLock);
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for (i = 0; i < MC_MAXIMUM; i++) InitializeListHead(&UsedPageListHeads[i]);
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InitializeListHead(&FreeUnzeroedPageListHead);
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InitializeListHead(&FreeZeroedPageListHead);
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InitializeListHead(&BiosPageListHead);
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LastKernelAddress = PAGE_ROUND_UP(LastKernelAddress);
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LastPhysKernelAddress = (ULONG_PTR)PAGE_ROUND_UP(LastPhysKernelAddress);
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DPRINT("MmInitializePageList(FirstPhysKernelAddress %x, "
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"LastPhysKernelAddress %x, "
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"MemorySizeInPages %x, LastKernelAddress %x)\n",
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FirstPhysKernelAddress,
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LastPhysKernelAddress,
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MemorySizeInPages,
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LastKernelAddress);
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MmPageArraySize = MemorySizeInPages;
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MmPageArray = (PHYSICAL_PAGE *)LastKernelAddress;
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for (i = 0; i < MC_MAXIMUM; i++)
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{
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InitializeListHead(&UsedPageListHeads[i]);
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}
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KeInitializeSpinLock(&PageListLock);
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InitializeListHead(&FreeUnzeroedPageListHead);
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InitializeListHead(&FreeZeroedPageListHead);
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InitializeListHead(&BiosPageListHead);
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Reserved = PAGE_ROUND_UP((MmPageArraySize * sizeof(PHYSICAL_PAGE))) / PAGE_SIZE;
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DPRINT("Reserved %d\n", Reserved);
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LastKernelAddress = ((ULONG_PTR)LastKernelAddress + (Reserved * PAGE_SIZE));
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LastPhysKernelAddress = (ULONG_PTR)LastPhysKernelAddress + (Reserved * PAGE_SIZE);
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LastKernelAddress = PAGE_ROUND_UP(LastKernelAddress);
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MmPageArraySize = MemorySizeInPages;
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Reserved =
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PAGE_ROUND_UP((MmPageArraySize * sizeof(PHYSICAL_PAGE))) / PAGE_SIZE;
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MmPageArray = (PHYSICAL_PAGE *)LastKernelAddress;
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DPRINT("Reserved %d\n", Reserved);
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LastKernelAddress = PAGE_ROUND_UP(LastKernelAddress);
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LastKernelAddress = ((ULONG_PTR)LastKernelAddress + (Reserved * PAGE_SIZE));
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LastPhysKernelAddress = (ULONG_PTR)PAGE_ROUND_UP(LastPhysKernelAddress);
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LastPhysKernelAddress = (ULONG_PTR)LastPhysKernelAddress + (Reserved * PAGE_SIZE);
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MmStats.NrTotalPages = 0;
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MmStats.NrSystemPages = 0;
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MmStats.NrUserPages = 0;
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MmStats.NrReservedPages = 0;
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MmStats.NrFreePages = 0;
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MmStats.NrLockedPages = 0;
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/* Preinitialize the Balancer because we need some pages for pte's */
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MmInitializeBalancer(MemorySizeInPages, 0);
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FirstUninitializedPage = (ULONG_PTR)LastPhysKernelAddress / PAGE_SIZE;
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LastPage = MmPageArraySize;
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for (i = 0; i < Reserved; i++)
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{
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PVOID Address = (char*)MmPageArray + (i * PAGE_SIZE);
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ULONG j, start, end;
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if (!MmIsPagePresent(NULL, Address))
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{
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PFN_TYPE Pfn;
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Pfn = 0;
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while (Pfn == 0 && LastPage > FirstUninitializedPage)
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{
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/* Allocate the page from the upper end of the RAM */
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if (MiIsPfnRam(BIOSMemoryMap, AddressRangeCount, --LastPage))
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{
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Pfn = LastPage;
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}
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}
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if (Pfn == 0)
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{
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Pfn = MmAllocPage(MC_NPPOOL, 0);
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/* Preinitialize the Balancer because we need some pages for pte's */
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MmInitializeBalancer(MemorySizeInPages, 0);
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FirstUninitializedPage = (ULONG_PTR)LastPhysKernelAddress / PAGE_SIZE;
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LastPage = MmPageArraySize;
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for (i = 0; i < Reserved; i++)
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{
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PVOID Address = (char*)MmPageArray + (i * PAGE_SIZE);
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ULONG j, start, end;
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if (!MmIsPagePresent(NULL, Address))
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{
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PFN_TYPE Pfn;
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Pfn = 0;
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while (Pfn == 0 && LastPage > FirstUninitializedPage)
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{
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/* Allocate the page from the upper end of the RAM */
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if (MiIsPfnRam(BIOSMemoryMap, AddressRangeCount, --LastPage))
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{
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Pfn = LastPage;
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}
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}
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if (Pfn == 0)
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{
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KEBUGCHECK(0);
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}
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}
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Status = MmCreateVirtualMappingForKernel(Address,
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PAGE_READWRITE,
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&Pfn,
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1);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("Unable to create virtual mapping\n");
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KEBUGCHECK(0);
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}
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}
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else
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{
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/* Setting the page protection is necessary to set the global bit on IA32 */
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MmSetPageProtect(NULL, Address, PAGE_READWRITE);
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}
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memset(Address, 0, PAGE_SIZE);
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start = ((ULONG_PTR)Address - (ULONG_PTR)MmPageArray) / sizeof(PHYSICAL_PAGE);
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end = ((ULONG_PTR)Address - (ULONG_PTR)MmPageArray + PAGE_SIZE) / sizeof(PHYSICAL_PAGE);
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for (j = start; j < end && j < LastPage; j++)
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{
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if (MiIsPfnRam(BIOSMemoryMap, AddressRangeCount, j))
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{
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if (j == 0)
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{
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/*
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* Page zero is reserved for the IVT
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*/
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MmPageArray[0].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[0].Flags.Consumer = MC_NPPOOL;
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MmPageArray[0].Flags.Zero = 0;
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MmPageArray[0].ReferenceCount = 0;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[0].ListEntry);
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MmStats.NrReservedPages++;
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}
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else if (j == 1)
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{
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/*
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* Page one is reserved for the initial KPCR
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*/
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MmPageArray[1].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[1].Flags.Consumer = MC_NPPOOL;
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MmPageArray[1].Flags.Zero = 0;
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MmPageArray[1].ReferenceCount = 0;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[1].ListEntry);
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MmStats.NrReservedPages++;
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}
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else if (j == 2)
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{
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/*
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* Page two is reserved for the KUSER_SHARED_DATA
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*/
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MmPageArray[2].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[2].Flags.Consumer = MC_NPPOOL;
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MmPageArray[2].Flags.Zero = 0;
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MmPageArray[2].ReferenceCount = 0;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[2].ListEntry);
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MmStats.NrReservedPages++;
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}
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/* Protect the Page Directory. This will be changed in r3 */
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else if (j >= (PdeStart / PAGE_SIZE) && j < (MmFreeLdrPageDirectoryEnd / PAGE_SIZE))
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{
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MmPageArray[j].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[j].Flags.Zero = 0;
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MmPageArray[j].Flags.Consumer = MC_NPPOOL;
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MmPageArray[j].ReferenceCount = 1;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[j].ListEntry);
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MmStats.NrReservedPages++;
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}
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else if (j >= 0xa0000 / PAGE_SIZE && j < 0x100000 / PAGE_SIZE)
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{
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MmPageArray[j].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[j].Flags.Zero = 0;
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MmPageArray[j].Flags.Consumer = MC_NPPOOL;
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MmPageArray[j].ReferenceCount = 1;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[j].ListEntry);
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MmStats.NrReservedPages++;
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}
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else if (j >= (ULONG)FirstPhysKernelAddress/PAGE_SIZE &&
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j < (ULONG)LastPhysKernelAddress/PAGE_SIZE)
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{
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MmPageArray[j].Flags.Type = MM_PHYSICAL_PAGE_USED;
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MmPageArray[j].Flags.Zero = 0;
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MmPageArray[j].Flags.Consumer = MC_NPPOOL;
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/* Reference count 2, because we're having ReferenceCount track
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MapCount as well. */
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MmPageArray[j].ReferenceCount = 2;
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MmPageArray[j].MapCount = 1;
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InsertTailList(&UsedPageListHeads[MC_NPPOOL],
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&MmPageArray[j].ListEntry);
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MmStats.NrSystemPages++;
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}
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else
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{
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MmPageArray[j].Flags.Type = MM_PHYSICAL_PAGE_FREE;
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MmPageArray[j].Flags.Zero = 0;
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MmPageArray[j].ReferenceCount = 0;
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InsertTailList(&FreeUnzeroedPageListHead,
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&MmPageArray[j].ListEntry);
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UnzeroedPageCount++;
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MmStats.NrFreePages++;
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}
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}
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else
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{
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MmPageArray[j].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[j].Flags.Consumer = MC_NPPOOL;
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MmPageArray[j].Flags.Zero = 0;
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MmPageArray[j].ReferenceCount = 0;
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{
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Pfn = MmAllocPage(MC_NPPOOL, 0);
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if (Pfn == 0)
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{
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KEBUGCHECK(0);
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}
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}
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Status = MmCreateVirtualMappingForKernel(Address,
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PAGE_READWRITE,
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&Pfn,
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1);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("Unable to create virtual mapping\n");
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KEBUGCHECK(0);
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}
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}
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else
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{
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/* Setting the page protection is necessary to set the global bit on IA32 */
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MmSetPageProtect(NULL, Address, PAGE_READWRITE);
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}
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memset(Address, 0, PAGE_SIZE);
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start = ((ULONG_PTR)Address - (ULONG_PTR)MmPageArray) / sizeof(PHYSICAL_PAGE);
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end = ((ULONG_PTR)Address - (ULONG_PTR)MmPageArray + PAGE_SIZE) / sizeof(PHYSICAL_PAGE);
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for (j = start; j < end && j < LastPage; j++)
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{
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if (MiIsPfnRam(BIOSMemoryMap, AddressRangeCount, j))
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{
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if (j == 0)
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{
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/*
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* Page zero is reserved for the IVT
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*/
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MmPageArray[0].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[0].Flags.Consumer = MC_NPPOOL;
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MmPageArray[0].Flags.Zero = 0;
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MmPageArray[0].ReferenceCount = 0;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[0].ListEntry);
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MmStats.NrReservedPages++;
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}
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else if (j == 1)
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{
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/*
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* Page one is reserved for the initial KPCR
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*/
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MmPageArray[1].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[1].Flags.Consumer = MC_NPPOOL;
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MmPageArray[1].Flags.Zero = 0;
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MmPageArray[1].ReferenceCount = 0;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[1].ListEntry);
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MmStats.NrReservedPages++;
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}
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else if (j == 2)
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{
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/*
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* Page two is reserved for the KUSER_SHARED_DATA
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*/
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MmPageArray[2].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[2].Flags.Consumer = MC_NPPOOL;
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MmPageArray[2].Flags.Zero = 0;
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MmPageArray[2].ReferenceCount = 0;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[2].ListEntry);
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MmStats.NrReservedPages++;
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}
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/* Protect the Page Directory. This will be changed in r3 */
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else if (j >= (PdeStart / PAGE_SIZE) && j < (MmFreeLdrPageDirectoryEnd / PAGE_SIZE))
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{
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MmPageArray[j].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[j].Flags.Zero = 0;
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MmPageArray[j].Flags.Consumer = MC_NPPOOL;
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MmPageArray[j].ReferenceCount = 1;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[j].ListEntry);
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MmStats.NrReservedPages++;
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}
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else if (j >= 0xa0000 / PAGE_SIZE && j < 0x100000 / PAGE_SIZE)
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{
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MmPageArray[j].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[j].Flags.Zero = 0;
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MmPageArray[j].Flags.Consumer = MC_NPPOOL;
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MmPageArray[j].ReferenceCount = 1;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[j].ListEntry);
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MmStats.NrReservedPages++;
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}
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else if (j >= (ULONG)FirstPhysKernelAddress/PAGE_SIZE &&
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j < (ULONG)LastPhysKernelAddress/PAGE_SIZE)
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{
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MmPageArray[j].Flags.Type = MM_PHYSICAL_PAGE_USED;
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MmPageArray[j].Flags.Zero = 0;
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MmPageArray[j].Flags.Consumer = MC_NPPOOL;
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/* Reference count 2, because we're having ReferenceCount track
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MapCount as well. */
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MmPageArray[j].ReferenceCount = 2;
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MmPageArray[j].MapCount = 1;
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InsertTailList(&UsedPageListHeads[MC_NPPOOL],
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&MmPageArray[j].ListEntry);
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MmStats.NrSystemPages++;
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}
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else
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{
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MmPageArray[j].Flags.Type = MM_PHYSICAL_PAGE_FREE;
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MmPageArray[j].Flags.Zero = 0;
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MmPageArray[j].ReferenceCount = 0;
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InsertTailList(&FreeUnzeroedPageListHead,
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&MmPageArray[j].ListEntry);
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UnzeroedPageCount++;
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MmStats.NrFreePages++;
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}
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}
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else
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{
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MmPageArray[j].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[j].Flags.Consumer = MC_NPPOOL;
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MmPageArray[j].Flags.Zero = 0;
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MmPageArray[j].ReferenceCount = 0;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[j].ListEntry);
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MmStats.NrReservedPages++;
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}
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}
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FirstUninitializedPage = j;
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}
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/* Add the pages from the upper end to the list */
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for (i = LastPage; i < MmPageArraySize; i++)
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{
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if (MiIsPfnRam(BIOSMemoryMap, AddressRangeCount, i))
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{
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MmPageArray[i].Flags.Type = MM_PHYSICAL_PAGE_USED;
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MmPageArray[i].Flags.Zero = 0;
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MmPageArray[i].Flags.Consumer = MC_NPPOOL;
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MmPageArray[i].ReferenceCount = 2;
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MmPageArray[i].MapCount = 1;
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InsertTailList(&UsedPageListHeads[MC_NPPOOL],
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&MmPageArray[i].ListEntry);
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MmStats.NrSystemPages++;
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}
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else
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{
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MmPageArray[i].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[i].Flags.Consumer = MC_NPPOOL;
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MmPageArray[i].Flags.Zero = 0;
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MmPageArray[i].ReferenceCount = 0;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[j].ListEntry);
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MmStats.NrReservedPages++;
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}
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}
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FirstUninitializedPage = j;
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}
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/* Add the pages from the upper end to the list */
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for (i = LastPage; i < MmPageArraySize; i++)
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{
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if (MiIsPfnRam(BIOSMemoryMap, AddressRangeCount, i))
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{
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MmPageArray[i].Flags.Type = MM_PHYSICAL_PAGE_USED;
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MmPageArray[i].Flags.Zero = 0;
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MmPageArray[i].Flags.Consumer = MC_NPPOOL;
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MmPageArray[i].ReferenceCount = 2;
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MmPageArray[i].MapCount = 1;
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InsertTailList(&UsedPageListHeads[MC_NPPOOL],
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&MmPageArray[i].ListEntry);
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MmStats.NrSystemPages++;
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}
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else
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{
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MmPageArray[i].Flags.Type = MM_PHYSICAL_PAGE_BIOS;
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MmPageArray[i].Flags.Consumer = MC_NPPOOL;
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MmPageArray[i].Flags.Zero = 0;
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MmPageArray[i].ReferenceCount = 0;
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InsertTailList(&BiosPageListHead,
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&MmPageArray[i].ListEntry);
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MmStats.NrReservedPages++;
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}
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}
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KeInitializeEvent(&ZeroPageThreadEvent, NotificationEvent, TRUE);
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MmStats.NrTotalPages = MmStats.NrFreePages + MmStats.NrSystemPages +
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MmStats.NrReservedPages + MmStats.NrUserPages;
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MmInitializeBalancer(MmStats.NrFreePages, MmStats.NrSystemPages + MmStats.NrReservedPages);
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return((PVOID)LastKernelAddress);
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&MmPageArray[i].ListEntry);
|
||||
MmStats.NrReservedPages++;
|
||||
}
|
||||
}
|
||||
|
||||
KeInitializeEvent(&ZeroPageThreadEvent, NotificationEvent, TRUE);
|
||||
|
||||
MmStats.NrTotalPages = MmStats.NrFreePages + MmStats.NrSystemPages + MmStats.NrReservedPages + MmStats.NrUserPages;
|
||||
MmInitializeBalancer(MmStats.NrFreePages, MmStats.NrSystemPages + MmStats.NrReservedPages);
|
||||
return((PVOID)LastKernelAddress);
|
||||
}
|
||||
|
||||
VOID
|
||||
|
|
|
|||
|
|
@ -289,7 +289,6 @@ MmInit1(ULONG_PTR FirstKrnlPhysAddr,
|
|||
ULONG MaxMem)
|
||||
{
|
||||
ULONG kernel_len;
|
||||
ULONG_PTR MappingAddress;
|
||||
PLDR_DATA_TABLE_ENTRY LdrEntry;
|
||||
|
||||
/* Dump memory descriptors */
|
||||
|
|
@ -353,15 +352,6 @@ MmInit1(ULONG_PTR FirstKrnlPhysAddr,
|
|||
/* Unmap low memory */
|
||||
MmDeletePageTable(NULL, 0);
|
||||
|
||||
/* Unmap FreeLDR's 6MB allocation */
|
||||
DPRINT("Invalidating between %p and %p\n", LastKernelAddress, KSEG0_BASE + 0x00600000);
|
||||
for (MappingAddress = LastKernelAddress;
|
||||
MappingAddress < KSEG0_BASE + 0x00600000;
|
||||
MappingAddress += PAGE_SIZE)
|
||||
{
|
||||
MmRawDeleteVirtualMapping((PVOID)MappingAddress);
|
||||
}
|
||||
|
||||
/* Intialize memory areas */
|
||||
MmInitVirtualMemory(LastKernelAddress, kernel_len);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue