[ros-diffs] [ros-arm-bringup] 34202: - Plug in RAM disk boot support (kernel-side)
ros-arm-bringup at svn.reactos.org
ros-arm-bringup at svn.reactos.org
Mon Jun 30 04:15:48 CEST 2008
Author: ros-arm-bringup
Date: Sun Jun 29 21:15:48 2008
New Revision: 34202
URL: http://svn.reactos.org/svn/reactos?rev=34202&view=rev
Log:
- Plug in RAM disk boot support (kernel-side)
Added:
trunk/reactos/ntoskrnl/io/iomgr/ramdisk.c (with props)
Modified:
trunk/reactos/ntoskrnl/include/internal/io.h
trunk/reactos/ntoskrnl/ntoskrnl-generic.rbuild
Modified: trunk/reactos/ntoskrnl/include/internal/io.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/io.h?rev=34202&r1=34201&r2=34202&view=diff
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/io.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/include/internal/io.h [iso-8859-1] Sun Jun 29 21:15:48 2008
@@ -55,6 +55,30 @@
// Returns the type of METHOD_ used in this IOCTL
//
#define IO_METHOD_FROM_CTL_CODE(c) (c & 0x00000003)
+
+//
+// Bugcheck codes for RAM disk booting
+//
+//
+// No LoaderXIPRom descriptor was found in the loader memory list
+//
+#define RD_NO_XIPROM_DESCRIPTOR 1
+//
+// Unable to open the RAM disk driver (ramdisk.sys or \Device\Ramdisk)
+//
+#define RD_NO_RAMDISK_DRIVER 2
+//
+// FSCTL_CREATE_RAM_DISK failed
+//
+#define RD_FSCTL_FAILED 3
+//
+// Unable to create GUID string from binary GUID
+//
+#define RD_GUID_CONVERT_FAILED 4
+//
+// Unable to create symbolic link pointing to the RAM disk device
+//
+#define RD_SYMLINK_CREATE_FAILED 5
//
// Packet Types when piggybacking on the IRP Overlay
@@ -987,6 +1011,15 @@
);
//
+// Ramdisk Routines
+//
+NTSTATUS
+NTAPI
+IopStartRamdisk(
+ IN PLOADER_PARAMETER_BLOCK LoaderBlock
+);
+
+//
// Global I/O Data
//
extern POBJECT_TYPE IoCompletionType;
Added: trunk/reactos/ntoskrnl/io/iomgr/ramdisk.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/io/iomgr/ramdisk.c?rev=34202&view=auto
==============================================================================
--- trunk/reactos/ntoskrnl/io/iomgr/ramdisk.c (added)
+++ trunk/reactos/ntoskrnl/io/iomgr/ramdisk.c [iso-8859-1] Sun Jun 29 21:15:48 2008
@@ -1,0 +1,255 @@
+/*
+ * PROJECT: ReactOS Kernel
+ * LICENSE: BSD - See COPYING.ARM in the top level directory
+ * FILE: ntoskrnl/io/iomgr/ramdisk.c
+ * PURPOSE: Allows booting from RAM disk
+ * PROGRAMMERS: ReactOS Portable Systems Group
+ */
+
+/* INCLUDES *******************************************************************/
+
+#include <ntoskrnl.h>
+#include <initguid.h>
+#include <ntddrdsk.h>
+#define NDEBUG
+#include <debug.h>
+
+/* DATA ***********************************************************************/
+
+#if defined (ALLOC_PRAGMA)
+#pragma alloc_text(INIT, IopStartRamdisk)
+#endif
+
+/* FUNCTIONS ******************************************************************/
+
+NTSTATUS
+NTAPI
+IopStartRamdisk(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
+{
+ PMEMORY_ALLOCATION_DESCRIPTOR MemoryDescriptor;
+ NTSTATUS Status;
+ PCHAR CommandLine, Offset, OffsetValue, Length, LengthValue;
+ HANDLE DriverHandle;
+ RAMDISK_CREATE_INPUT RamdiskCreate;
+ IO_STATUS_BLOCK IoStatusBlock;
+ UNICODE_STRING GuidString, SymbolicLinkName, ObjectName, DeviceString;
+ PLIST_ENTRY ListHead, NextEntry;
+ OBJECT_ATTRIBUTES ObjectAttributes;
+ WCHAR SourceString[54];
+
+ //
+ // Scan memory descriptors
+ //
+ MemoryDescriptor = NULL;
+ ListHead = &LoaderBlock->MemoryDescriptorListHead;
+ NextEntry = ListHead->Flink;
+ while (NextEntry != ListHead)
+ {
+ //
+ // Get the descriptor
+ //
+ MemoryDescriptor = CONTAINING_RECORD(NextEntry,
+ MEMORY_ALLOCATION_DESCRIPTOR,
+ ListEntry);
+
+ //
+ // Needs to be a ROM/RAM descriptor
+ //
+ if (MemoryDescriptor->MemoryType == LoaderXIPRom) break;
+
+ //
+ // Keep trying
+ //
+ NextEntry = NextEntry->Flink;
+ }
+
+ //
+ // Nothing found?
+ //
+ if (NextEntry == ListHead)
+ {
+ //
+ // Bugcheck -- no data
+ //
+ KeBugCheckEx(RAMDISK_BOOT_INITIALIZATION_FAILED,
+ RD_NO_XIPROM_DESCRIPTOR,
+ STATUS_INVALID_PARAMETER,
+ 0,
+ 0);
+ }
+
+ //
+ // Setup the input buffer
+ //
+ RtlZeroMemory(&RamdiskCreate, sizeof(RamdiskCreate));
+ RamdiskCreate.Version = sizeof(RamdiskCreate);
+ RamdiskCreate.DiskType = FILE_DEVICE_CD_ROM_FILE_SYSTEM;
+ RamdiskCreate.BasePage = MemoryDescriptor->BasePage;
+ RamdiskCreate.DiskOffset = 0;
+ RamdiskCreate.DiskLength = MemoryDescriptor->PageCount << PAGE_SHIFT;
+ RamdiskCreate.DiskGuid = RAMDISK_BOOTDISK_GUID;
+ RamdiskCreate.DriveLetter = L'C';
+ RamdiskCreate.Options.Fixed = TRUE;
+
+ //
+ // Check for commandline parameters
+ //
+ CommandLine = LoaderBlock->LoadOptions;
+ if (CommandLine)
+ {
+ //
+ // Make everything upper case
+ //
+ _strupr(CommandLine);
+
+ //
+ // Check for offset parameter
+ //
+ Offset = strstr(CommandLine, "RDIMAGEOFFSET");
+ if (Offset)
+ {
+ //
+ // Get to the actual value
+ //
+ OffsetValue = strstr(Offset, "=");
+ if (OffsetValue)
+ {
+ //
+ // Set the offset
+ //
+ RamdiskCreate.DiskOffset = atol(OffsetValue + 1);
+ }
+ }
+
+ //
+ // Reduce the disk length
+ //
+ RamdiskCreate.DiskLength -= RamdiskCreate.DiskOffset;
+
+ //
+ // Check for length parameter
+ //
+ Length = strstr(CommandLine, "RDIMAGELENGTH");
+ if (Length)
+ {
+ //
+ // Get to the actual value
+ //
+ LengthValue = strstr(Length, "=");
+ if (LengthValue)
+ {
+ //
+ // Set the offset
+ //
+ RamdiskCreate.DiskLength = _atoi64(LengthValue + 1);
+ }
+ }
+ }
+
+ //
+ // Setup object attributes
+ //
+ RtlInitUnicodeString(&ObjectName, L"\\Device\\Ramdisk");
+ InitializeObjectAttributes(&ObjectAttributes,
+ &ObjectName,
+ OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE,
+ NULL,
+ NULL);
+
+ //
+ // Open a handle to the driver
+ //
+ Status = ZwOpenFile(&DriverHandle,
+ GENERIC_ALL,
+ &ObjectAttributes,
+ &IoStatusBlock,
+ FILE_SHARE_READ | FILE_SHARE_WRITE,
+ FILE_SYNCHRONOUS_IO_NONALERT);
+ if (!(NT_SUCCESS(Status)) || !(NT_SUCCESS(IoStatusBlock.Status)))
+ {
+ //
+ // Bugcheck -- no driver
+ //
+ KeBugCheckEx(RAMDISK_BOOT_INITIALIZATION_FAILED,
+ RD_NO_RAMDISK_DRIVER,
+ IoStatusBlock.Status,
+ 0,
+ 0);
+ }
+
+ //
+ // Send create command
+ //
+ Status = ZwDeviceIoControlFile(DriverHandle,
+ NULL,
+ NULL,
+ NULL,
+ &IoStatusBlock,
+ FSCTL_CREATE_RAM_DISK,
+ &RamdiskCreate,
+ sizeof(RamdiskCreate),
+ NULL,
+ 0);
+ ZwClose(DriverHandle);
+ if (!(NT_SUCCESS(Status)) || !(NT_SUCCESS(IoStatusBlock.Status)))
+ {
+ //
+ // Bugcheck -- driver failed
+ //
+ KeBugCheckEx(RAMDISK_BOOT_INITIALIZATION_FAILED,
+ RD_FSCTL_FAILED,
+ IoStatusBlock.Status,
+ 0,
+ 0);
+ }
+
+ //
+ // Convert the GUID
+ //
+ Status = RtlStringFromGUID(&RamdiskCreate.DiskGuid, &GuidString);
+ if (!NT_SUCCESS(Status))
+ {
+ //
+ // Bugcheck -- GUID convert failed
+ //
+ KeBugCheckEx(RAMDISK_BOOT_INITIALIZATION_FAILED,
+ RD_GUID_CONVERT_FAILED,
+ Status,
+ 0,
+ 0);
+ }
+
+ //
+ // Build the symbolic link name and target
+ //
+ _snwprintf(SourceString,
+ sizeof(SourceString),
+ L"\\Device\\Ramdisk%wZ",
+ &GuidString);
+ SymbolicLinkName.Length = 38;
+ SymbolicLinkName.MaximumLength = 38 + sizeof(UNICODE_NULL);
+ SymbolicLinkName.Buffer = L"\\ArcName\\ramdisk(0)";
+
+ //
+ // Create the symbolic link
+ //
+ RtlInitUnicodeString(&DeviceString, SourceString);
+ Status = IoCreateSymbolicLink(&SymbolicLinkName, &DeviceString);
+ RtlFreeUnicodeString(&GuidString);
+ if (!NT_SUCCESS(Status))
+ {
+ //
+ // Bugcheck -- symlink create failed
+ //
+ KeBugCheckEx(RAMDISK_BOOT_INITIALIZATION_FAILED,
+ RD_SYMLINK_CREATE_FAILED,
+ Status,
+ 0,
+ 0);
+ }
+
+ //
+ // We made it
+ //
+ return STATUS_SUCCESS;
+}
Propchange: trunk/reactos/ntoskrnl/io/iomgr/ramdisk.c
------------------------------------------------------------------------------
svn:eol-style = native
Propchange: trunk/reactos/ntoskrnl/io/iomgr/ramdisk.c
------------------------------------------------------------------------------
svn:mime-type = text/plain
Modified: trunk/reactos/ntoskrnl/ntoskrnl-generic.rbuild
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ntoskrnl-generic.rbuild?rev=34202&r1=34201&r2=34202&view=diff
==============================================================================
--- trunk/reactos/ntoskrnl/ntoskrnl-generic.rbuild [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ntoskrnl-generic.rbuild [iso-8859-1] Sun Jun 29 21:15:48 2008
@@ -256,6 +256,7 @@
<file>iowork.c</file>
<file>irp.c</file>
<file>irq.c</file>
+ <file>ramdisk.c</file>
<file>rawfs.c</file>
<file>remlock.c</file>
<file>util.c</file>
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