#include <ndk/asm.h>
#include <debug.h>
-extern ULONG TotalNLSSize;
extern ULONG LoaderPagesSpanned;
-// This is needed because headers define wrong one for ReactOS
-#undef KIP0PCRADDRESS
-#define KIP0PCRADDRESS 0xffdff000
-
-#define HYPER_SPACE_ENTRY 0x300
-
PCHAR MemTypeDesc[] = {
"ExceptionBlock ", // ?
"SystemBlock ", // ?
WinLdrRemoveDescriptor(IN PMEMORY_ALLOCATION_DESCRIPTOR Descriptor);
VOID
-WinLdrSetProcessorContext(PVOID GdtIdt, IN ULONG Pcr, IN ULONG Tss);
-
-// This is needed only for SetProcessorContext routine
-#pragma pack(2)
- typedef struct
- {
- USHORT Limit;
- ULONG Base;
- } GDTIDT;
-#pragma pack(4)
-
-/* GLOBALS ***************************************************************/
-
-PHARDWARE_PTE PDE;
-PHARDWARE_PTE HalPageTable;
-
-PUCHAR PhysicalPageTablesBuffer;
-PUCHAR KernelPageTablesBuffer;
-ULONG PhysicalPageTables;
-ULONG KernelPageTables;
-
-MEMORY_ALLOCATION_DESCRIPTOR *Mad;
-ULONG MadCount = 0;
-
-
-/* FUNCTIONS **************************************************************/
+WinLdrSetProcessorContext(PVOID GdtIdt, IN ULONG_PTR Pcr, IN ULONG_PTR Tss);
BOOLEAN
-MempAllocatePageTables()
-{
- ULONG NumPageTables, TotalSize;
- PUCHAR Buffer;
- // It's better to allocate PDE + PTEs contigiuos
-
- // Max number of entries = MaxPageNum >> 10
- // FIXME: This is a number to describe ALL physical memory
- // and windows doesn't expect ALL memory mapped...
- NumPageTables = (GetSystemMemorySize() >> MM_PAGE_SHIFT) >> 10;
-
- DPRINTM(DPRINT_WINDOWS, "NumPageTables = %d\n", NumPageTables);
-
- // Allocate memory block for all these things:
- // PDE, HAL mapping page table, physical mapping, kernel mapping
- TotalSize = (1+1+NumPageTables*2)*MM_PAGE_SIZE;
-
- // PDE+HAL+KernelPTEs == MemoryData
- Buffer = MmAllocateMemoryWithType(TotalSize, LoaderMemoryData);
-
- // Physical PTEs = FirmwareTemporary
- PhysicalPageTablesBuffer = (PUCHAR)Buffer + TotalSize - NumPageTables*MM_PAGE_SIZE;
- MmSetMemoryType(PhysicalPageTablesBuffer,
- NumPageTables*MM_PAGE_SIZE,
- LoaderFirmwareTemporary);
-
- // This check is now redundant
- if (Buffer + (TotalSize - NumPageTables*MM_PAGE_SIZE) !=
- PhysicalPageTablesBuffer)
- {
- DPRINTM(DPRINT_WINDOWS, "There was a problem allocating two adjacent blocks of memory!");
- }
-
- if (Buffer == NULL || PhysicalPageTablesBuffer == NULL)
- {
- UiMessageBox("Impossible to allocate memory block for page tables!");
- return FALSE;
- }
-
- // Zero all this memory block
- RtlZeroMemory(Buffer, TotalSize);
-
- // Set up pointers correctly now
- PDE = (PHARDWARE_PTE)Buffer;
-
- // Map the page directory at 0xC0000000 (maps itself)
- PDE[HYPER_SPACE_ENTRY].PageFrameNumber = (ULONG)PDE >> MM_PAGE_SHIFT;
- PDE[HYPER_SPACE_ENTRY].Valid = 1;
- PDE[HYPER_SPACE_ENTRY].Write = 1;
-
- // The last PDE slot is allocated for HAL's memory mapping (Virtual Addresses 0xFFC00000 - 0xFFFFFFFF)
- HalPageTable = (PHARDWARE_PTE)&Buffer[MM_PAGE_SIZE*1];
-
- // Map it
- PDE[1023].PageFrameNumber = (ULONG)HalPageTable >> MM_PAGE_SHIFT;
- PDE[1023].Valid = 1;
- PDE[1023].Write = 1;
-
- // Store pointer to the table for easier access
- KernelPageTablesBuffer = &Buffer[MM_PAGE_SIZE*2];
-
- // Zero counters of page tables used
- PhysicalPageTables = 0;
- KernelPageTables = 0;
-
- return TRUE;
-}
-
-VOID
-MempAllocatePTE(ULONG Entry, PHARDWARE_PTE *PhysicalPT, PHARDWARE_PTE *KernelPT)
-{
- //Print(L"Creating PDE Entry %X\n", Entry);
-
- // Identity mapping
- *PhysicalPT = (PHARDWARE_PTE)&PhysicalPageTablesBuffer[PhysicalPageTables*MM_PAGE_SIZE];
- PhysicalPageTables++;
-
- PDE[Entry].PageFrameNumber = (ULONG)*PhysicalPT >> MM_PAGE_SHIFT;
- PDE[Entry].Valid = 1;
- PDE[Entry].Write = 1;
-
- if (Entry+(KSEG0_BASE >> 22) > 1023)
- {
- DPRINTM(DPRINT_WINDOWS, "WARNING! Entry: %X > 1023\n", Entry+(KSEG0_BASE >> 22));
- }
-
- // Kernel-mode mapping
- *KernelPT = (PHARDWARE_PTE)&KernelPageTablesBuffer[KernelPageTables*MM_PAGE_SIZE];
- KernelPageTables++;
-
- PDE[Entry+(KSEG0_BASE >> 22)].PageFrameNumber = ((ULONG)*KernelPT >> MM_PAGE_SHIFT);
- PDE[Entry+(KSEG0_BASE >> 22)].Valid = 1;
- PDE[Entry+(KSEG0_BASE >> 22)].Write = 1;
-}
+MempAllocatePageTables();
BOOLEAN
MempSetupPaging(IN ULONG StartPage,
- IN ULONG NumberOfPages)
-{
- PHARDWARE_PTE PhysicalPT;
- PHARDWARE_PTE KernelPT;
- ULONG Entry, Page;
-
- //Print(L"MempSetupPaging: SP 0x%X, Number: 0x%X\n", StartPage, NumberOfPages);
-
- // HACK
- if (StartPage+NumberOfPages >= 0x80000)
- {
- //
- // We can't map this as it requires more than 1 PDE
- // and in fact it's not possible at all ;)
- //
- //Print(L"skipping...\n");
- return TRUE;
- }
+ IN ULONG NumberOfPages);
- //
- // Now actually set up the page tables for identity mapping
- //
- for (Page=StartPage; Page < StartPage+NumberOfPages; Page++)
- {
- Entry = Page >> 10;
+BOOLEAN
+WinLdrMapSpecialPages(ULONG PcrBasePage);
- if (((PULONG)PDE)[Entry] == 0)
- {
- MempAllocatePTE(Entry, &PhysicalPT, &KernelPT);
- }
- else
- {
- PhysicalPT = (PHARDWARE_PTE)(PDE[Entry].PageFrameNumber << MM_PAGE_SHIFT);
- KernelPT = (PHARDWARE_PTE)(PDE[Entry+(KSEG0_BASE >> 22)].PageFrameNumber << MM_PAGE_SHIFT);
- }
+VOID
+MempUnmapPage(ULONG Page);
- if (Page == 0)
- {
- PhysicalPT[Page & 0x3ff].PageFrameNumber = Page;
- PhysicalPT[Page & 0x3ff].Valid = 0;
- PhysicalPT[Page & 0x3ff].Write = 0;
+VOID
+MempDump();
- KernelPT[Page & 0x3ff].PageFrameNumber = Page;
- KernelPT[Page & 0x3ff].Valid = 0;
- KernelPT[Page & 0x3ff].Write = 0;
- }
- else
- {
- PhysicalPT[Page & 0x3ff].PageFrameNumber = Page;
- PhysicalPT[Page & 0x3ff].Valid = 1;
- PhysicalPT[Page & 0x3ff].Write = 1;
+/* GLOBALS ***************************************************************/
- KernelPT[Page & 0x3ff].PageFrameNumber = Page;
- KernelPT[Page & 0x3ff].Valid = 1;
- KernelPT[Page & 0x3ff].Write = 1;
- }
- }
+MEMORY_ALLOCATION_DESCRIPTOR *Mad;
+ULONG MadCount = 0;
- return TRUE;
-}
+/* FUNCTIONS **************************************************************/
VOID
MempDisablePages()
for (Page = StartPage; Page < EndPage; Page++)
{
- PHARDWARE_PTE KernelPT;
- ULONG Entry = (Page >> 10) + (KSEG0_BASE >> 22);
-
- if (PDE[Entry].Valid)
- {
- KernelPT = (PHARDWARE_PTE)(PDE[Entry].PageFrameNumber << MM_PAGE_SHIFT);
-
- if (KernelPT)
- {
- KernelPT[Page & 0x3ff].PageFrameNumber = 0;
- KernelPT[Page & 0x3ff].Valid = 0;
- KernelPT[Page & 0x3ff].Write = 0;
- }
- }
+ MempUnmapPage(Page);
}
}
}
}
}
-#ifdef _M_IX86
-VOID
-WinLdrpMapApic()
-{
- BOOLEAN LocalAPIC;
- LARGE_INTEGER MsrValue;
- ULONG APICAddress, CpuInfo[4];
-
- /* Check if we have a local APIC */
- __cpuid((int*)CpuInfo, 1);
- LocalAPIC = (((CpuInfo[3] >> 9) & 1) != 0);
-
- /* If there is no APIC, just return */
- if (!LocalAPIC)
- return;
-
- /* Read the APIC Address */
- MsrValue.QuadPart = __readmsr(0x1B);
- APICAddress = (MsrValue.LowPart & 0xFFFFF000);
-
- DPRINTM(DPRINT_WINDOWS, "Local APIC detected at address 0x%x\n",
- APICAddress);
-
- /* Map it */
- HalPageTable[(APIC_BASE - 0xFFC00000) >> MM_PAGE_SHIFT].PageFrameNumber
- = APICAddress >> MM_PAGE_SHIFT;
- HalPageTable[(APIC_BASE - 0xFFC00000) >> MM_PAGE_SHIFT].Valid = 1;
- HalPageTable[(APIC_BASE - 0xFFC00000) >> MM_PAGE_SHIFT].Write = 1;
- HalPageTable[(APIC_BASE - 0xFFC00000) >> MM_PAGE_SHIFT].WriteThrough = 1;
- HalPageTable[(APIC_BASE - 0xFFC00000) >> MM_PAGE_SHIFT].CacheDisable = 1;
-}
-#else
-VOID
-WinLdrpMapApic()
-{
- /* Implement it for another arch */
-}
-#endif
-
BOOLEAN
WinLdrTurnOnPaging(IN OUT PLOADER_PARAMETER_BLOCK LoaderBlock,
ULONG PcrBasePage,
return;
}*/
- //VideoDisplayString(L"Hello from VGA, going into the kernel\n");
- DPRINTM(DPRINT_WINDOWS, "HalPageTable: 0x%X\n", HalPageTable);
-
- // Page Tables have been setup, make special handling for PCR and TSS
- // (which is done in BlSetupFotNt in usual ntldr)
- HalPageTable[(KI_USER_SHARED_DATA - 0xFFC00000) >> MM_PAGE_SHIFT].PageFrameNumber = PcrBasePage+1;
- HalPageTable[(KI_USER_SHARED_DATA - 0xFFC00000) >> MM_PAGE_SHIFT].Valid = 1;
- HalPageTable[(KI_USER_SHARED_DATA - 0xFFC00000) >> MM_PAGE_SHIFT].Write = 1;
-
- HalPageTable[(KIP0PCRADDRESS - 0xFFC00000) >> MM_PAGE_SHIFT].PageFrameNumber = PcrBasePage;
- HalPageTable[(KIP0PCRADDRESS - 0xFFC00000) >> MM_PAGE_SHIFT].Valid = 1;
- HalPageTable[(KIP0PCRADDRESS - 0xFFC00000) >> MM_PAGE_SHIFT].Write = 1;
-
- // Map APIC
- WinLdrpMapApic();
-
- // Map VGA memory
- //VideoMemoryBase = MmMapIoSpace(0xb8000, 4000, MmNonCached);
- //DPRINTM(DPRINT_WINDOWS, "VideoMemoryBase: 0x%X\n", VideoMemoryBase);
+ /* Map stuff like PCR, KI_USER_SHARED_DATA and Apic */
+ WinLdrMapSpecialPages(PcrBasePage);
Tss = (PKTSS)(KSEG0_BASE | (TssBasePage << MM_PAGE_SHIFT));
List_PaToVa(&LoaderBlock->MemoryDescriptorListHead);
#if DBG
- {
- ULONG *PDE_Addr=(ULONG *)PDE;//0xC0300000;
- int j;
-
- DPRINTM(DPRINT_WINDOWS, "\nPDE\n");
-
- for (i=0; i<128; i++)
- {
- DPRINTM(DPRINT_WINDOWS, "0x%04X | ", i*8);
-
- for (j=0; j<8; j++)
- {
- DPRINTM(DPRINT_WINDOWS, "0x%08X ", PDE_Addr[i*8+j]);
- }
-
- DPRINTM(DPRINT_WINDOWS, "\n");
- }
- }
+ MempDump();
#endif
-
- // Enable paging
- //BS->ExitBootServices(ImageHandle,MapKey);
-
- // Disable Interrupts
- _disable();
-
- // Re-initalize EFLAGS
- __writeeflags(0);
-
- // Set the PDBR
- __writecr3((ULONG_PTR)PDE);
-
- // Enable paging by modifying CR0
- __writecr0(__readcr0() | CR0_PG);
-
// Set processor context
WinLdrSetProcessorContext(GdtIdt, KIP0PCRADDRESS, KSEG0_BASE | (TssBasePage << MM_PAGE_SHIFT));
return;
}
-VOID
-WinLdrSetProcessorContext(PVOID GdtIdt, IN ULONG Pcr, IN ULONG Tss)
-{
- GDTIDT GdtDesc, IdtDesc, OldIdt;
- PKGDTENTRY pGdt;
- PKIDTENTRY pIdt;
- ULONG Ldt = 0;
- //ULONG i;
-
- DPRINTM(DPRINT_WINDOWS, "GDtIdt %p, Pcr %p, Tss 0x%08X\n",
- GdtIdt, Pcr, Tss);
-
- // Kernel expects the PCR to be zero-filled on startup
- // FIXME: Why zero it here when we can zero it right after allocation?
- RtlZeroMemory((PVOID)Pcr, MM_PAGE_SIZE); //FIXME: Why zero only 1 page when we allocate 2?
-
- // Get old values of GDT and IDT
- Ke386GetGlobalDescriptorTable(&GdtDesc);
- __sidt(&IdtDesc);
-
- // Save old IDT
- OldIdt.Base = IdtDesc.Base;
- OldIdt.Limit = IdtDesc.Limit;
-
- // Prepare new IDT+GDT
- GdtDesc.Base = KSEG0_BASE | (ULONG_PTR)GdtIdt;
- GdtDesc.Limit = NUM_GDT * sizeof(KGDTENTRY) - 1;
- IdtDesc.Base = (ULONG)((PUCHAR)GdtDesc.Base + GdtDesc.Limit + 1);
- IdtDesc.Limit = NUM_IDT * sizeof(KIDTENTRY) - 1;
-
- // ========================
- // Fill all descriptors now
- // ========================
-
- pGdt = (PKGDTENTRY)GdtDesc.Base;
- pIdt = (PKIDTENTRY)IdtDesc.Base;
-
- //
- // Code selector (0x8)
- // Flat 4Gb
- //
- pGdt[1].LimitLow = 0xFFFF;
- pGdt[1].BaseLow = 0;
- pGdt[1].HighWord.Bytes.BaseMid = 0;
- pGdt[1].HighWord.Bytes.Flags1 = 0x9A;
- pGdt[1].HighWord.Bytes.Flags2 = 0xCF;
- pGdt[1].HighWord.Bytes.BaseHi = 0;
-
- //
- // Data selector (0x10)
- // Flat 4Gb
- //
- pGdt[2].LimitLow = 0xFFFF;
- pGdt[2].BaseLow = 0;
- pGdt[2].HighWord.Bytes.BaseMid = 0;
- pGdt[2].HighWord.Bytes.Flags1 = 0x92;
- pGdt[2].HighWord.Bytes.Flags2 = 0xCF;
- pGdt[2].HighWord.Bytes.BaseHi = 0;
-
- //
- // Selector (0x18)
- // Flat 2Gb
- //
- pGdt[3].LimitLow = 0xFFFF;
- pGdt[3].BaseLow = 0;
- pGdt[3].HighWord.Bytes.BaseMid = 0;
- pGdt[3].HighWord.Bytes.Flags1 = 0xFA;
- pGdt[3].HighWord.Bytes.Flags2 = 0xCF;
- pGdt[3].HighWord.Bytes.BaseHi = 0;
-
- //
- // Selector (0x20)
- // Flat 2Gb
- //
- pGdt[4].LimitLow = 0xFFFF;
- pGdt[4].BaseLow = 0;
- pGdt[4].HighWord.Bytes.BaseMid = 0;
- pGdt[4].HighWord.Bytes.Flags1 = 0xF2;
- pGdt[4].HighWord.Bytes.Flags2 = 0xCF;
- pGdt[4].HighWord.Bytes.BaseHi = 0;
-
- //
- // TSS Selector (0x28)
- //
- pGdt[5].LimitLow = 0x78-1; //FIXME: Check this
- pGdt[5].BaseLow = (USHORT)(Tss & 0xffff);
- pGdt[5].HighWord.Bytes.BaseMid = (UCHAR)((Tss >> 16) & 0xff);
- pGdt[5].HighWord.Bytes.Flags1 = 0x89;
- pGdt[5].HighWord.Bytes.Flags2 = 0x00;
- pGdt[5].HighWord.Bytes.BaseHi = (UCHAR)((Tss >> 24) & 0xff);
-
- //
- // PCR Selector (0x30)
- //
- pGdt[6].LimitLow = 0x01;
- pGdt[6].BaseLow = (USHORT)(Pcr & 0xffff);
- pGdt[6].HighWord.Bytes.BaseMid = (UCHAR)((Pcr >> 16) & 0xff);
- pGdt[6].HighWord.Bytes.Flags1 = 0x92;
- pGdt[6].HighWord.Bytes.Flags2 = 0xC0;
- pGdt[6].HighWord.Bytes.BaseHi = (UCHAR)((Pcr >> 24) & 0xff);
-
- //
- // Selector (0x38)
- //
- pGdt[7].LimitLow = 0xFFFF;
- pGdt[7].BaseLow = 0;
- pGdt[7].HighWord.Bytes.BaseMid = 0;
- pGdt[7].HighWord.Bytes.Flags1 = 0xF3;
- pGdt[7].HighWord.Bytes.Flags2 = 0x40;
- pGdt[7].HighWord.Bytes.BaseHi = 0;
-
- //
- // Some BIOS stuff (0x40)
- //
- pGdt[8].LimitLow = 0xFFFF;
- pGdt[8].BaseLow = 0x400;
- pGdt[8].HighWord.Bytes.BaseMid = 0;
- pGdt[8].HighWord.Bytes.Flags1 = 0xF2;
- pGdt[8].HighWord.Bytes.Flags2 = 0x0;
- pGdt[8].HighWord.Bytes.BaseHi = 0;
-
- //
- // Selector (0x48)
- //
- pGdt[9].LimitLow = 0;
- pGdt[9].BaseLow = 0;
- pGdt[9].HighWord.Bytes.BaseMid = 0;
- pGdt[9].HighWord.Bytes.Flags1 = 0;
- pGdt[9].HighWord.Bytes.Flags2 = 0;
- pGdt[9].HighWord.Bytes.BaseHi = 0;
-
- //
- // Selector (0x50)
- //
- pGdt[10].LimitLow = 0xFFFF; //FIXME: Not correct!
- pGdt[10].BaseLow = 0;
- pGdt[10].HighWord.Bytes.BaseMid = 0x2;
- pGdt[10].HighWord.Bytes.Flags1 = 0x89;
- pGdt[10].HighWord.Bytes.Flags2 = 0;
- pGdt[10].HighWord.Bytes.BaseHi = 0;
-
- //
- // Selector (0x58)
- //
- pGdt[11].LimitLow = 0xFFFF;
- pGdt[11].BaseLow = 0;
- pGdt[11].HighWord.Bytes.BaseMid = 0x2;
- pGdt[11].HighWord.Bytes.Flags1 = 0x9A;
- pGdt[11].HighWord.Bytes.Flags2 = 0;
- pGdt[11].HighWord.Bytes.BaseHi = 0;
-
- //
- // Selector (0x60)
- //
- pGdt[12].LimitLow = 0xFFFF;
- pGdt[12].BaseLow = 0; //FIXME: Maybe not correct, but noone cares
- pGdt[12].HighWord.Bytes.BaseMid = 0x2;
- pGdt[12].HighWord.Bytes.Flags1 = 0x92;
- pGdt[12].HighWord.Bytes.Flags2 = 0;
- pGdt[12].HighWord.Bytes.BaseHi = 0;
-
- //
- // Video buffer Selector (0x68)
- //
- pGdt[13].LimitLow = 0x3FFF;
- pGdt[13].BaseLow = 0x8000;
- pGdt[13].HighWord.Bytes.BaseMid = 0x0B;
- pGdt[13].HighWord.Bytes.Flags1 = 0x92;
- pGdt[13].HighWord.Bytes.Flags2 = 0;
- pGdt[13].HighWord.Bytes.BaseHi = 0;
-
- //
- // Points to GDT (0x70)
- //
- pGdt[14].LimitLow = NUM_GDT*sizeof(KGDTENTRY) - 1;
- pGdt[14].BaseLow = 0x7000;
- pGdt[14].HighWord.Bytes.BaseMid = 0xFF;
- pGdt[14].HighWord.Bytes.Flags1 = 0x92;
- pGdt[14].HighWord.Bytes.Flags2 = 0;
- pGdt[14].HighWord.Bytes.BaseHi = 0xFF;
-
- //
- // Some unused descriptors should go here
- //
-
- // Copy the old IDT
- RtlCopyMemory(pIdt, (PVOID)OldIdt.Base, OldIdt.Limit + 1);
-
- // Mask interrupts
- //asm("cli\n"); // they are already masked before enabling paged mode
-
- // Load GDT+IDT
- Ke386SetGlobalDescriptorTable(&GdtDesc);
- __lidt(&IdtDesc);
-
- // Jump to proper CS and clear prefetch queue
-#if defined(__GNUC__)
- asm("ljmp $0x08, $1f\n"
- "1:\n");
-#elif defined(_MSC_VER)
- /* We can't express the above in MASM so we use this far return instead */
- DbgPrint("WinLdrSetProcessorContext: Performing untested far-return\n");
- __asm {
- push 8
- push offset resume
- retf
- resume:
- };
-#else
-#error
-#endif
-
- // Set SS selector
- Ke386SetSs(0x10); // DataSelector=0x10
-
- // Set DS and ES selectors
- Ke386SetDs(0x10);
- Ke386SetEs(0x10); // this is vital for rep stosd
-
- // LDT = not used ever, thus set to 0
- Ke386SetLocalDescriptorTable(Ldt);
-
- // Load TSR
- Ke386SetTr(KGDT_TSS);
-
- // Clear GS
- Ke386SetGs(0);
-
- // Set FS to PCR
- Ke386SetFs(0x30);
-
- // Real end of the function, just for information
- /* do not uncomment!
- pop edi;
- pop esi;
- pop ebx;
- mov esp, ebp;
- pop ebp;
- ret
- */
-}
projects / reactos.git / blobdiff