[arty] 28801: Move mismerged segment to the right place; claim from openfirmware if we don't have enough reserve.

Author: arty
Date: Mon Sep  3 09:29:03 2007
New Revision: 28801

URL: http://svn.reactos.org/svn/reactos?rev=28801&view=rev
Log:
Move mismerged segment to the right place; claim from openfirmware if we
don't have enough reserve.

Modified:
    trunk/reactos/boot/freeldr/freeldr/mm/mm.c

Modified: trunk/reactos/boot/freeldr/freeldr/mm/mm.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/mm/mm....
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/mm/mm.c (original)
+++ trunk/reactos/boot/freeldr/freeldr/mm/mm.c Mon Sep  3 09:29:03 2007
@@ -68,36 +68,38 @@

if (MemorySize == 0)
    {
+		DbgPrint((DPRINT_MEMORY, "MmAllocateMemory() called for 0 bytes. Returning NULL.\n"));
+		UiMessageBoxCritical("Memory allocation failed: MmAllocateMemory() called for 0 bytes.");
+		return NULL;
+	}
+
+	MemorySize = ROUND_UP(MemorySize, 4);
+	if (MemorySize <= SubAllocationRest)
+	{
+		MemPointer = (PVOID)((ULONG_PTR)SubAllocationPage + MM_PAGE_SIZE - SubAllocationRest);
+		SubAllocationRest -= MemorySize;
+		return MemPointer;
+	}
+
+	// Find out how many blocks it will take to
+	// satisfy this allocation
+	PagesNeeded = ROUND_UP(MemorySize, MM_PAGE_SIZE) / MM_PAGE_SIZE;
+
+	// If we don't have enough available mem
+	// then return NULL
+	if (FreePagesInLookupTable < PagesNeeded)
+	{
 #ifdef _M_PPC
                ULONG ptr;
                printf("Allocating %d bytes directly ...\n", MemorySize);
                ptr = ofw_claim(0,MemorySize,MM_PAGE_SIZE);
                MemPointer = (PVOID)(ptr);
-#endif
-		DbgPrint((DPRINT_MEMORY, "MmAllocateMemory() called for 0 bytes. Returning NULL.\n"));
-		UiMessageBoxCritical("Memory allocation failed: MmAllocateMemory() called for 0 bytes.");
-		return NULL;
-	}
-
-	MemorySize = ROUND_UP(MemorySize, 4);
-	if (MemorySize <= SubAllocationRest)
-	{
-		MemPointer = (PVOID)((ULONG_PTR)SubAllocationPage + MM_PAGE_SIZE - SubAllocationRest);
-		SubAllocationRest -= MemorySize;
-		return MemPointer;
-	}
-
-	// Find out how many blocks it will take to
-	// satisfy this allocation
-	PagesNeeded = ROUND_UP(MemorySize, MM_PAGE_SIZE) / MM_PAGE_SIZE;
-
-	// If we don't have enough available mem
-	// then return NULL
-	if (FreePagesInLookupTable < PagesNeeded)
-	{
+               return MemPointer;
+#else
    	DbgPrint((DPRINT_MEMORY, "Memory allocation failed in MmAllocateMemory(). Not enough free memory to allocate %d bytes. AllocationCount: %d\n", MemorySize, AllocationCount));
    	UiMessageBoxCritical("Memory allocation failed: out of memory.");
    	return NULL;
+#endif
    }

FirstFreePageFromEnd = MmFindAvailablePages(PageLookupTableAddress, TotalPagesInLookupTable, PagesNeeded, AllocateFromEnd);