mirror of
https://github.com/reactos/reactos.git
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84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: ntoskrnl/ex/xipdisp.c
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* PURPOSE: eXecute In Place (XIP) Support.
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#include <debug.h>
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/* GLOBALS *******************************************************************/
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/* FUNCTIONS *****************************************************************/
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PMEMORY_ALLOCATION_DESCRIPTOR
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NTAPI
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XIPpFindMemoryDescriptor(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
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{
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PLIST_ENTRY NextEntry;
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PMEMORY_ALLOCATION_DESCRIPTOR Descriptor = NULL;
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/* Loop the memory descriptors */
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for (NextEntry = LoaderBlock->MemoryDescriptorListHead.Flink;
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NextEntry != &LoaderBlock->MemoryDescriptorListHead;
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NextEntry = NextEntry->Flink)
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{
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/* Get the current descriptor and check if it's the XIP ROM */
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Descriptor = CONTAINING_RECORD(NextEntry,
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MEMORY_ALLOCATION_DESCRIPTOR,
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ListEntry);
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if (Descriptor->MemoryType == LoaderXIPRom) return Descriptor;
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}
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/* Nothing found if we got here */
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return NULL;
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}
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VOID
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NTAPI
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XIPInit(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
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{
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PCHAR CommandLine, XipBoot, XipRom, XipMegs, XipVerbose, XipRam;
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PMEMORY_ALLOCATION_DESCRIPTOR XipDescriptor;
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/* Get the command line */
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CommandLine = LoaderBlock->LoadOptions;
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if (!CommandLine) return;
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/* Get XIP settings */
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XipBoot = strstr(CommandLine, "XIPBOOT");
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XipRam = strstr(CommandLine, "XIPRAM=");
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XipRom = strstr(CommandLine, "XIPROM=");
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XipMegs = strstr(CommandLine, "XIPMEGS=");
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XipVerbose = strstr(CommandLine, "XIPVERBOSE");
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/* Check if this is a verbose boot */
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if (XipVerbose)
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{
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/* Print out our header */
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DbgPrint("\n\nXIP: debug timestamp at line %d in %s: <<<%s %s>>>\n\n",
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__LINE__,
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__FILE__,
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__DATE__,
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__TIME__);
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}
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/* Find the XIP memory descriptor */
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XipDescriptor = XIPpFindMemoryDescriptor(LoaderBlock);
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if (!XipDescriptor) return;
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//
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// Make sure this is really XIP, and not RAM Disk -- also validate XIP
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// Basically, either this is a ROM boot or a RAM boot, but not both nor none
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//
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if (!((ULONG_PTR)XipRom ^ (ULONG_PTR)XipRam)) return;
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/* FIXME: TODO */
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DPRINT1("ReactOS does not yet support eXecute In Place boot technology\n");
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}
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/* EOF */
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