From 78b58e34df4dd3ac57da14249a25c57656394f65 Mon Sep 17 00:00:00 2001
From: Alex Ionescu <aionescu@gmail.com>
Date: Thu, 10 May 2007 16:42:24 +0000
Subject: [PATCH] - Add i386/cmhardwr.c and start implementing
 CmpInitializeMachineDependentConfiguration. Currently it only detects and
 writes the key for PAE. - Call the API from CmInitSystem1.

svn path=/trunk/; revision=26675
---
 reactos/ntoskrnl/cm/registry.c          | 12 ++++++
 reactos/ntoskrnl/config/i386/cmhardwr.c | 57 +++++++++++++++++++++++++
 reactos/ntoskrnl/ntoskrnl.rbuild        |  5 +++
 3 files changed, 74 insertions(+)
 create mode 100644 reactos/ntoskrnl/config/i386/cmhardwr.c

diff --git a/reactos/ntoskrnl/cm/registry.c b/reactos/ntoskrnl/cm/registry.c
index e876b2dbce9..31fa65c8d66 100644
--- a/reactos/ntoskrnl/cm/registry.c
+++ b/reactos/ntoskrnl/cm/registry.c
@@ -74,6 +74,10 @@ NTSTATUS
 NTAPI
 CmpCreateControlSet(IN PLOADER_PARAMETER_BLOCK LoaderBlock);
 
+NTSTATUS
+NTAPI
+CmpInitializeMachineDependentConfiguration(IN PLOADER_PARAMETER_BLOCK LoaderBlock);
+
 static VOID STDCALL
 CmiHiveSyncDpcRoutine(PKDPC Dpc,
 		      PVOID DeferredContext,
@@ -510,6 +514,14 @@ CmInitSystem1(VOID)
         KEBUGCHECKEX(CONFIG_INITIALIZATION_FAILED, 1, 12, Status, 0);
     }
 
+    /* Initialize machine-dependent information into the registry */
+    Status = CmpInitializeMachineDependentConfiguration(KeLoaderBlock);
+    if (!NT_SUCCESS(Status))
+    {
+        /* Bugcheck */
+        KEBUGCHECKEX(CONFIG_INITIALIZATION_FAILED, 1, 14, Status, 0);
+    }
+
     /* Initialize volatile registry settings */
     Status = CmpSetSystemValues(KeLoaderBlock);
     if (!NT_SUCCESS(Status))
diff --git a/reactos/ntoskrnl/config/i386/cmhardwr.c b/reactos/ntoskrnl/config/i386/cmhardwr.c
new file mode 100644
index 00000000000..c7db38ea319
--- /dev/null
+++ b/reactos/ntoskrnl/config/i386/cmhardwr.c
@@ -0,0 +1,57 @@
+/*
+ * PROJECT:         ReactOS Kernel
+ * LICENSE:         GPL - See COPYING in the top level directory
+ * FILE:            ntoskrnl/config/i386/cmhardwr.c
+ * PURPOSE:         Configuration Manager - Hardware-Specific Code
+ * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
+ */
+
+/* INCLUDES ******************************************************************/
+
+#include "ntoskrnl.h"
+#include "../cm.h"
+#define NDEBUG
+#include "debug.h"
+
+/* FUNCTIONS *****************************************************************/
+
+NTSTATUS
+NTAPI
+CmpInitializeMachineDependentConfiguration(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
+{
+    UNICODE_STRING KeyName, ValueName;
+    OBJECT_ATTRIBUTES ObjectAttributes;
+    ULONG HavePae;
+    NTSTATUS Status;
+    HANDLE KeyHandle;
+
+    RtlInitUnicodeString(&KeyName,
+                         L"\\Registry\\Machine\\SYSTEM\\CurrentControlSet\\"
+                         L"Control\\Session Manager\\Memory Management");
+    InitializeObjectAttributes(&ObjectAttributes,
+                               &KeyName,
+                               OBJ_CASE_INSENSITIVE,
+                               NULL,
+                               NULL);
+    Status = NtOpenKey(&KeyHandle, KEY_READ | KEY_WRITE, &ObjectAttributes);
+    if (NT_SUCCESS(Status))
+    {
+        /* Detect if PAE is enabled */
+        HavePae = SharedUserData->ProcessorFeatures[PF_PAE_ENABLED];
+
+        /* Set the value */
+        RtlInitUnicodeString(&ValueName, L"PhysicalAddressExtension");
+        NtSetValueKey(KeyHandle,
+                      &ValueName,
+                      0,
+                      REG_DWORD,
+                      &HavePae,
+                      sizeof(HavePae));
+
+        /* Close the key */
+        NtClose(KeyHandle);
+    }
+
+    /* All done*/
+    return STATUS_SUCCESS;
+}
diff --git a/reactos/ntoskrnl/ntoskrnl.rbuild b/reactos/ntoskrnl/ntoskrnl.rbuild
index ef592d7c616..59642596f19 100644
--- a/reactos/ntoskrnl/ntoskrnl.rbuild
+++ b/reactos/ntoskrnl/ntoskrnl.rbuild
@@ -84,6 +84,11 @@
             <file>view.c</file>
     </directory>
     <directory name="config">
+            <if property="ARCH" value="i386">
+                <directory name="i386">
+                    <file>cmhardwr.c</file>
+                </directory>
+            </if>
             <file>cmboot.c</file>
             <file>cmcontrl.c</file>
             <file>cmdata.c</file>