From e7756d443d69137d61c43d2eb22c8a5b18f63067 Mon Sep 17 00:00:00 2001
From: ReactOS Portable Systems Group <ros-arm-bringup@svn.reactos.org>
Date: Mon, 30 Jun 2008 02:42:12 +0000
Subject: [PATCH] - Add RAM disk support to FreeLDR and to the NTLDR emulation
 layer in the kernel for non-clean archs (ppc and x86)

svn path=/trunk/; revision=34204
---
 reactos/boot/freeldr/freeldr/reactos/reactos.c |  2 ++
 reactos/include/reactos/rosldr.h               |  2 ++
 reactos/ntoskrnl/ke/freeldr.c                  | 15 +++++++++++++++
 3 files changed, 19 insertions(+)

diff --git a/reactos/boot/freeldr/freeldr/reactos/reactos.c b/reactos/boot/freeldr/freeldr/reactos/reactos.c
index 0369e8d84c0..f66c73be570 100644
--- a/reactos/boot/freeldr/freeldr/reactos/reactos.c
+++ b/reactos/boot/freeldr/freeldr/reactos/reactos.c
@@ -601,6 +601,8 @@ LoadAndBootReactOS(PCSTR OperatingSystemName)
 	LoaderBlock.ModsCount = 0;
 	LoaderBlock.ModsAddr = reactos_modules;
     LoaderBlock.DrivesAddr = reactos_arc_disk_info;
+    LoaderBlock.RdAddr = (ULONG)gRamDiskBase;
+    LoaderBlock.RdLength = gRamDiskSize;
     LoaderBlock.MmapLength = (unsigned long)MachGetMemoryMap((PBIOS_MEMORY_MAP)reactos_memory_map, 32) * sizeof(memory_map_t);
     if (LoaderBlock.MmapLength)
     {
diff --git a/reactos/include/reactos/rosldr.h b/reactos/include/reactos/rosldr.h
index fc3eac54cf0..c7a76f810d0 100644
--- a/reactos/include/reactos/rosldr.h
+++ b/reactos/include/reactos/rosldr.h
@@ -35,6 +35,8 @@ typedef struct _ROS_LOADER_PARAMETER_BLOCK
     UCHAR Syms[12];
     ULONG MmapLength;
     ULONG MmapAddr;
+    ULONG RdLength;
+    ULONG RdAddr;
     ULONG DrivesCount;
     PARC_DISK_SIGNATURE DrivesAddr;
     ULONG ConfigTable;
diff --git a/reactos/ntoskrnl/ke/freeldr.c b/reactos/ntoskrnl/ke/freeldr.c
index 1d9a0b31ba8..ce70a634c0c 100644
--- a/reactos/ntoskrnl/ke/freeldr.c
+++ b/reactos/ntoskrnl/ke/freeldr.c
@@ -1148,6 +1148,21 @@ KiRosFrldrLpbToNtLpb(IN PROS_LOADER_PARAMETER_BLOCK RosLoaderBlock,
                               KERNEL_DESCRIPTOR_PAGE(RosEntry->ModEnd),
                               0,
                               &Base);
+    
+    //
+    // Check if we have a ramdisk
+    //
+    if ((RosLoaderBlock->RdAddr) && (RosLoaderBlock->RdLength))
+    {
+        //
+        // Build a descriptor for it
+        //
+        KiRosAllocateNtDescriptor(LoaderXIPRom,
+                                  KERNEL_DESCRIPTOR_PAGE(RosLoaderBlock->RdAddr),
+                                  (RosLoaderBlock->RdLength + PAGE_SIZE - 1) >> PAGE_SHIFT,
+                                  0,
+                                  &Base);
+    }
 
     /* Setup command line */
     LoaderBlock->LoadOptions = BldrCommandLine;