[tfaber] 57333: [NTOSKRNL] - Correctly show the amount of available memory in the serial debug log. Patch by Hermès Bélusca (2/2) CORE-6635 #comment Committed. Thanks. #resolve

Author: tfaber
Date: Wed Sep 19 06:54:42 2012
New Revision: 57333
URL: http://svn.reactos.org/svn/reactos?rev=57333&view=rev
Log:
[NTOSKRNL]
- Correctly show the amount of available memory in the serial debug log. Patch by Hermès
Bélusca (2/2)
CORE-6635 #comment Committed. Thanks. #resolve
Modified:
    trunk/reactos/ntoskrnl/kd/kdio.c
Modified: trunk/reactos/ntoskrnl/kd/kdio.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/kd/kdio.c?rev=573…
==============================================================================
--- trunk/reactos/ntoskrnl/kd/kdio.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/kd/kdio.c [iso-8859-1] Wed Sep 19 06:54:42 2012
@@ -42,6 +42,55 @@
 volatile ULONG KdbDmesgTotalWritten = 0;
 KSPIN_LOCK KdpDmesgLogSpinLock;
 volatile BOOLEAN KdbpIsInDmesgMode = FALSE;
+
+/* UTILITY FUNCTIONS *********************************************************/
+
+/*
+ * Get the total size of the memory before
+ * Mm is initialized, by counting the number
+ * of physical pages. Useful for debug logging.
+ *
+ * Strongly inspired by:
+ * mm\ARM3\mminit.c : MiScanMemoryDescriptors(...)
+ */
+SIZE_T
+NTAPI
+KdpGetMemorySizeInMBs(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
+{
+    PLIST_ENTRY ListEntry;
+    PMEMORY_ALLOCATION_DESCRIPTOR Descriptor;
+    SIZE_T NumberOfPhysicalPages = 0;
+
+    /* Loop the memory descriptors */
+    for (ListEntry = LoaderBlock->MemoryDescriptorListHead.Flink;
+         ListEntry != &LoaderBlock->MemoryDescriptorListHead;
+         ListEntry = ListEntry->Flink)
+    {
+        /* Get the descriptor */
+        Descriptor = CONTAINING_RECORD(ListEntry,
+                                       MEMORY_ALLOCATION_DESCRIPTOR,
+                                       ListEntry);
+
+        /* Check if this is invisible memory */
+        if ((Descriptor->MemoryType == LoaderFirmwarePermanent) ||
+            (Descriptor->MemoryType == LoaderSpecialMemory) ||
+            (Descriptor->MemoryType == LoaderHALCachedMemory) ||
+            (Descriptor->MemoryType == LoaderBBTMemory))
+        {
+            /* Skip this descriptor */
+            continue;
+        }
+
+        /* Check if this is bad memory */
+        if (Descriptor->MemoryType != LoaderBad)
+        {
+            /* Count this in the total of pages */
+            NumberOfPhysicalPages += Descriptor->PageCount;
+        }
+    }
+
+    return NumberOfPhysicalPages * PAGE_SIZE / 1024 / 1024;
+}
 /* FILE DEBUG LOG FUNCTIONS **************************************************/
@@ -325,7 +374,7 @@
         /* Display separator + ReactOS version at start of the debug log */
         DPRINT1("-----------------------------------------------------\n");
         DPRINT1("ReactOS "KERNEL_VERSION_STR" (Build
"KERNEL_VERSION_BUILD_STR")\n");
-        MemSizeMBs = MmNumberOfPhysicalPages * PAGE_SIZE / 1024 / 1024;
+        MemSizeMBs = KdpGetMemorySizeInMBs(KeLoaderBlock);
         DPRINT1("%u System Processor [%u MB Memory]\n", KeNumberProcessors,
MemSizeMBs);
         DPRINT1("Command Line: %s\n", KeLoaderBlock->LoadOptions);
         DPRINT1("ARC Paths: %s %s %s %s\n",
KeLoaderBlock->ArcBootDeviceName,