/*
* FreeLoader
- * Copyright (C) 1998-2003 Brian Palmer <brianp@sginet.com>
- * Copyright (C) 2005 Alex Ionescu <alex@relsoft.net>
+ * Copyright (C) 2008 - 2009 Timo Kreuzer (timo.kreuzer@reactor.org)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _NTSYSTEM_
#include <freeldr.h>
#define NDEBUG
#include <debug.h>
-#undef DbgPrint
/* Page Directory and Tables for non-PAE Systems */
extern ULONG_PTR NextModuleBase;
extern ULONG_PTR KernelBase;
+ULONG_PTR GdtBase, IdtBase, TssBase;
extern ROS_KERNEL_ENTRY_POINT KernelEntryPoint;
PPAGE_DIRECTORY_AMD64 pPML4;
+PVOID pIdt, pGdt;
/* FUNCTIONS *****************************************************************/
void
-DumpLoaderBlock()
+EnableA20()
{
- DbgPrint("LoaderBlock @ %p.\n", &LoaderBlock);
- DbgPrint("Flags = 0x%x.\n", LoaderBlock.Flags);
- DbgPrint("MemLower = 0x%p.\n", (PVOID)LoaderBlock.MemLower);
- DbgPrint("MemHigher = 0x%p.\n", (PVOID)LoaderBlock.MemHigher);
- DbgPrint("BootDevice = 0x%x.\n", LoaderBlock.BootDevice);
- DbgPrint("CommandLine = %s.\n", LoaderBlock.CommandLine);
- DbgPrint("ModsCount = 0x%x.\n", LoaderBlock.ModsCount);
- DbgPrint("ModsAddr = 0x%p.\n", LoaderBlock.ModsAddr);
- DbgPrint("Syms = 0x%s.\n", LoaderBlock.Syms);
- DbgPrint("MmapLength = 0x%x.\n", LoaderBlock.MmapLength);
- DbgPrint("MmapAddr = 0x%p.\n", (PVOID)LoaderBlock.MmapAddr);
- DbgPrint("RdLength = 0x%x.\n", LoaderBlock.RdLength);
- DbgPrint("RdAddr = 0x%p.\n", (PVOID)LoaderBlock.RdAddr);
- DbgPrint("DrivesCount = 0x%x.\n", LoaderBlock.DrivesCount);
- DbgPrint("DrivesAddr = 0x%p.\n", (PVOID)LoaderBlock.DrivesAddr);
- DbgPrint("ConfigTable = 0x%x.\n", LoaderBlock.ConfigTable);
- DbgPrint("BootLoaderName = 0x%x.\n", LoaderBlock.BootLoaderName);
- DbgPrint("PageDirectoryStart = 0x%p.\n", (PVOID)LoaderBlock.PageDirectoryStart);
- DbgPrint("PageDirectoryEnd = 0x%p.\n", (PVOID)LoaderBlock.PageDirectoryEnd);
- DbgPrint("KernelBase = 0x%p.\n", (PVOID)LoaderBlock.KernelBase);
- DbgPrint("ArchExtra = 0x%p.\n", (PVOID)LoaderBlock.ArchExtra);
-
+ /* Already done */
}
/*++
NTAPI
FrLdrStartup(ULONG Magic)
{
- /* Disable Interrupts */
- _disable();
-
- /* Re-initalize EFLAGS */
- KeAmd64EraseFlags();
-
- /* Initialize the page directory */
- FrLdrSetupPageDirectory();
-
- /* Set the new PML4 */
- __writecr3((ULONGLONG)pPML4);
-
- LoaderBlock.FrLdrDbgPrint = DbgPrint;
-
-// DumpLoaderBlock();
-
- DbgPrint("Jumping to kernel @ %p.\n", KernelEntryPoint);
-
- /* Jump to Kernel */
- (*KernelEntryPoint)(Magic, &LoaderBlock);
-
-}
-
-PPAGE_DIRECTORY_AMD64
-FrLdrGetOrCreatePageDir(PPAGE_DIRECTORY_AMD64 pDir, ULONG Index)
-{
- PPAGE_DIRECTORY_AMD64 pSubDir;
-
- if (!pDir)
- return NULL;
-
- if (!pDir->Pde[Index].Valid)
- {
- pSubDir = MmAllocateMemoryWithType(PAGE_SIZE, LoaderSpecialMemory);
- if (!pSubDir)
- return NULL;
- RtlZeroMemory(pSubDir, PAGE_SIZE);
- pDir->Pde[Index].PageFrameNumber = PtrToPfn(pSubDir);
- pDir->Pde[Index].Valid = 1;
- pDir->Pde[Index].Write = 1;
- }
- else
- {
- pSubDir = (PPAGE_DIRECTORY_AMD64)((ULONGLONG)(pDir->Pde[Index].PageFrameNumber) * PAGE_SIZE);
- }
- return pSubDir;
-}
-
-BOOLEAN
-FrLdrMapSinglePage(ULONGLONG VirtualAddress, ULONGLONG PhysicalAddress)
-{
- PPAGE_DIRECTORY_AMD64 pDir3, pDir2, pDir1;
- ULONG Index;
-
- pDir3 = FrLdrGetOrCreatePageDir(pPML4, VAtoPXI(VirtualAddress));
- pDir2 = FrLdrGetOrCreatePageDir(pDir3, VAtoPPI(VirtualAddress));
- pDir1 = FrLdrGetOrCreatePageDir(pDir2, VAtoPDI(VirtualAddress));
-
- if (!pDir1)
- return FALSE;
-
- Index = VAtoPTI(VirtualAddress);
- if (pDir1->Pde[Index].Valid)
- {
- return FALSE;
- }
-
- pDir1->Pde[Index].Valid = 1;
- pDir1->Pde[Index].Write = 1;
- pDir1->Pde[Index].PageFrameNumber = PhysicalAddress / PAGE_SIZE;
-
- return TRUE;
-}
-
-ULONG
-FrLdrMapRangeOfPages(ULONGLONG VirtualAddress, ULONGLONG PhysicalAddress, ULONG cPages)
-{
- ULONG i;
-
- for (i = 0; i < cPages; i++)
- {
- if (!FrLdrMapSinglePage(VirtualAddress, PhysicalAddress))
- {
- return i;
- }
- VirtualAddress += PAGE_SIZE;
- PhysicalAddress += PAGE_SIZE;
- }
- return i;
-}
-
-
-/*++
- * FrLdrSetupPageDirectory
- * INTERNAL
- *
- * Sets up the ReactOS Startup Page Directory.
- *
- * Params:
- * None.
- *
- * Returns:
- * None.
- *
- * Remarks:
- * We are setting PDEs, but using the equvivalent (for our purpose) PTE structure.
- * As such, please note that PageFrameNumber == PageEntryNumber.
- *
- *--*/
-VOID
-FASTCALL
-FrLdrSetupPageDirectory(VOID)
-{
- ULONG KernelPages;
-
- /* Allocate a Page for the PML4 */
- pPML4 = MmAllocateMemoryWithType(PAGE_SIZE, LoaderSpecialMemory);
-
- ASSERT(pPML4);
-
- /* The page tables are located at 0xfffff68000000000
- * We create a recursive self mapping through all 4 levels at
- * virtual address 0xfffff6fb7dbedf68 */
- pPML4->Pde[VAtoPXI(PXE_BASE)].Valid = 1;
- pPML4->Pde[VAtoPXI(PXE_BASE)].Write = 1;
- pPML4->Pde[VAtoPXI(PXE_BASE)].PageFrameNumber = PtrToPfn(pPML4);
-
- /* Setup low memory pages */
- if (FrLdrMapRangeOfPages(0, 0, 1024) < 1024)
- {
- DbgPrint("Could not map low memory pages.\n");
- }
-
- /* Setup kernel pages */
- KernelPages = (ROUND_TO_PAGES(NextModuleBase - KERNEL_BASE_PHYS) / PAGE_SIZE);
- if (FrLdrMapRangeOfPages(KernelBase, KERNEL_BASE_PHYS, KernelPages) != KernelPages)
- {
- DbgPrint("Could not map %d kernel pages.\n", KernelPages);
- }
-
+ DbgPrint("ReactOS loader is unsupported! Halting.\n", KernelEntryPoint);
+ for(;;);
}
projects / reactos.git / blobdiff