[FREELDR]

- Fix a bug, where the bios memory map could have a bogus entry: according to R.B.'s Interrupt list, in some bioses the function for enumerating the memory can return ebx != 0 for the last descriptor, and fail in the following call returning CF = 1. In that case we were previously counting that last descriptor as well, but its content wouldn't describe a valid memory region.
- Use a static buffer for the bios memory map, stored in the achitecture specific file and return a pointer to that variable from PcMemGetMemoryMap. Reuse the static map from DetectAcpiBios instead of enumerating again. On arm, we don't even need a buffer, we return the pointer from the arm block.

svn path=/trunk/; revision=53803

reactos/boot/freeldr/freeldr/arch/arm/macharm.c

@@ -143,15 +143,12 @@ ArmHwDetect(VOID)
     return RootNode;
 }
 
-ULONG
-ArmMemGetMemoryMap(OUT PBIOS_MEMORY_MAP BiosMemoryMap,
-                   IN ULONG MaxMemoryMapSize)
+PBIOS_MEMORY_MAP
+ArmMemGetMemoryMap(OUT PULONG MaxMemoryMapSize)
 {
     /* Return whatever the board returned to us (CS0 Base + Size and FLASH0) */
-    memcpy(BiosMemoryMap,
-           ArmBoardBlock->MemoryMap,
-           ArmBoardBlock->MemoryMapEntryCount * sizeof(BIOS_MEMORY_MAP));
-    return ArmBoardBlock->MemoryMapEntryCount;
+    *MaxMemoryMapSize = ArmBoardBlock->MemoryMapEntryCount;
+    return ArmBoardBlock->MemoryMap;
 }
 
 VOID

reactos/boot/freeldr/freeldr/arch/i386/hwacpi.c

@@ -58,8 +58,7 @@ DetectAcpiBios(PCONFIGURATION_COMPONENT_DATA SystemKey, ULONG *BusNumber)
     PCM_PARTIAL_RESOURCE_DESCRIPTOR PartialDescriptor;
     PRSDP_DESCRIPTOR Rsdp;
     PACPI_BIOS_DATA AcpiBiosData;
-    BIOS_MEMORY_MAP BiosMemoryMap[32];
-    ULONG BiosMemoryMapEntryCount, TableSize;
+    ULONG TableSize;
 
     Rsdp = FindAcpiBios();
 
@@ -68,13 +67,8 @@ DetectAcpiBios(PCONFIGURATION_COMPONENT_DATA SystemKey, ULONG *BusNumber)
         /* Set up the flag in the loader block */
         AcpiPresent = TRUE;
 
-        /* Get BIOS memory map */
-        RtlZeroMemory(BiosMemoryMap, sizeof(BiosMemoryMap));
-        BiosMemoryMapEntryCount = PcMemGetMemoryMap(BiosMemoryMap,
-            sizeof(BiosMemoryMap) / sizeof(BIOS_MEMORY_MAP));
-
         /* Calculate the table size */
-        TableSize = BiosMemoryMapEntryCount * sizeof(BIOS_MEMORY_MAP) +
+        TableSize = PcBiosMapCount * sizeof(BIOS_MEMORY_MAP) +
             sizeof(ACPI_BIOS_DATA) - sizeof(BIOS_MEMORY_MAP);
 
         /* Set 'Configuration Data' value */
@@ -100,9 +94,9 @@ DetectAcpiBios(PCONFIGURATION_COMPONENT_DATA SystemKey, ULONG *BusNumber)
         /* Fill the table */
         AcpiBiosData = (PACPI_BIOS_DATA)&PartialResourceList->PartialDescriptors[1];
         AcpiBiosData->RSDTAddress.LowPart = Rsdp->rsdt_physical_address;
-        AcpiBiosData->Count = BiosMemoryMapEntryCount;
-        memcpy(AcpiBiosData->MemoryMap, BiosMemoryMap,
-            BiosMemoryMapEntryCount * sizeof(BIOS_MEMORY_MAP));
+        AcpiBiosData->Count = PcBiosMapCount;
+        memcpy(AcpiBiosData->MemoryMap, PcBiosMemoryMap,
+            PcBiosMapCount * sizeof(BIOS_MEMORY_MAP));
 
         TRACE("RSDT %p, data size %x\n", Rsdp->rsdt_physical_address,
             TableSize);

reactos/boot/freeldr/freeldr/arch/i386/pcmem.c

@@ -27,6 +27,11 @@
 
 DBG_DEFAULT_CHANNEL(MEMORY);
 
+#define MAX_BIOS_DESCRIPTORS 32
+
+BIOS_MEMORY_MAP PcBiosMemoryMap[MAX_BIOS_DESCRIPTORS];
+ULONG PcBiosMapCount;
+
 static
 BOOLEAN
 GetExtendedMemoryConfiguration(ULONG* pMemoryAtOneMB /* in KB */, ULONG* pMemoryAtSixteenMB /* in 64KB */)
@@ -174,14 +179,17 @@ PcMemGetBiosMemoryMap(PBIOS_MEMORY_MAP BiosMemoryMap, ULONG MaxMemoryMapSize)
    * CF set on error
    * AH = error code (86h)
    */
-  Regs.x.eax = 0x0000E820;
-  Regs.x.edx = 0x534D4150; /* ('SMAP') */
   Regs.x.ebx = 0x00000000;
-  Regs.x.ecx = sizeof(BIOS_MEMORY_MAP);
-  Regs.w.es = BIOSCALLBUFSEGMENT;
-  Regs.w.di = BIOSCALLBUFOFFSET;
+
   for (MapCount = 0; MapCount < MaxMemoryMapSize; MapCount++)
     {
+      /* Setup the registers for the BIOS call */
+      Regs.x.eax = 0x0000E820;
+      Regs.x.edx = 0x534D4150; /* ('SMAP') */
+      /* Regs.x.ebx = 0x00000001;  Continuation value already set */
+      Regs.x.ecx = sizeof(BIOS_MEMORY_MAP);
+      Regs.w.es = BIOSCALLBUFSEGMENT;
+      Regs.w.di = BIOSCALLBUFOFFSET;
       Int386(0x15, &Regs, &Regs);
 
       TRACE("Memory Map Entry %d\n", MapCount);
@@ -192,8 +200,8 @@ PcMemGetBiosMemoryMap(PBIOS_MEMORY_MAP BiosMemoryMap, ULONG MaxMemoryMapSize)
       TRACE("CF set = %s\n", (Regs.x.eflags & EFLAGS_CF) ? "TRUE" : "FALSE");
 
       /* If the BIOS didn't return 'SMAP' in EAX then
-       * it doesn't support this call */
-      if (Regs.x.eax != 0x534D4150)
+       * it doesn't support this call. If CF is set, we're done */
+      if (Regs.x.eax != 0x534D4150 || !INT386_SUCCESS(Regs))
         {
           break;
         }
@@ -210,62 +218,57 @@ PcMemGetBiosMemoryMap(PBIOS_MEMORY_MAP BiosMemoryMap, ULONG MaxMemoryMapSize)
       /* If the continuation value is zero or the
        * carry flag is set then this was
        * the last entry so we're done */
-      if (Regs.x.ebx == 0x00000000 || !INT386_SUCCESS(Regs))
+      if (Regs.x.ebx == 0x00000000)
         {
-          MapCount++;
           TRACE("End Of System Memory Map!\n\n");
           break;
         }
 
-      /* Setup the registers for the next call */
-      Regs.x.eax = 0x0000E820;
-      Regs.x.edx = 0x534D4150; /* ('SMAP') */
-      /* Regs.x.ebx = 0x00000001;  Continuation value already set by the BIOS */
-      Regs.x.ecx = sizeof(BIOS_MEMORY_MAP);
-      Regs.w.es = BIOSCALLBUFSEGMENT;
-      Regs.w.di = BIOSCALLBUFOFFSET;
     }
 
   return MapCount;
 }
 
-ULONG
-PcMemGetMemoryMap(PBIOS_MEMORY_MAP BiosMemoryMap, ULONG MaxMemoryMapSize)
+PBIOS_MEMORY_MAP
+PcMemGetMemoryMap(ULONG *MemoryMapSize)
 {
   ULONG EntryCount;
   ULONG ExtendedMemorySizeAtOneMB;
   ULONG ExtendedMemorySizeAtSixteenMB;
 
-  EntryCount = PcMemGetBiosMemoryMap(BiosMemoryMap, MaxMemoryMapSize);
+  EntryCount = PcMemGetBiosMemoryMap(PcBiosMemoryMap, MAX_BIOS_DESCRIPTORS);
+  PcBiosMapCount = EntryCount;
 
   /* If the BIOS didn't provide a memory map, synthesize one */
-  if (0 == EntryCount && 3 <= MaxMemoryMapSize)
+  if (0 == EntryCount)
     {
       GetExtendedMemoryConfiguration(&ExtendedMemorySizeAtOneMB, &ExtendedMemorySizeAtSixteenMB);
 
                                   /* Conventional memory */
-      BiosMemoryMap[EntryCount].BaseAddress = 0;
-      BiosMemoryMap[EntryCount].Length = PcMemGetConventionalMemorySize() * 1024;
-      BiosMemoryMap[EntryCount].Type = BiosMemoryUsable;
+      PcBiosMemoryMap[EntryCount].BaseAddress = 0;
+      PcBiosMemoryMap[EntryCount].Length = PcMemGetConventionalMemorySize() * 1024;
+      PcBiosMemoryMap[EntryCount].Type = BiosMemoryUsable;
       EntryCount++;
 
       /* Extended memory at 1MB */
-      BiosMemoryMap[EntryCount].BaseAddress = 1024 * 1024;
-      BiosMemoryMap[EntryCount].Length = ExtendedMemorySizeAtOneMB * 1024;
-      BiosMemoryMap[EntryCount].Type = BiosMemoryUsable;
+      PcBiosMemoryMap[EntryCount].BaseAddress = 1024 * 1024;
+      PcBiosMemoryMap[EntryCount].Length = ExtendedMemorySizeAtOneMB * 1024;
+      PcBiosMemoryMap[EntryCount].Type = BiosMemoryUsable;
       EntryCount++;
 
       if (ExtendedMemorySizeAtSixteenMB != 0)
       {
         /* Extended memory at 16MB */
-        BiosMemoryMap[EntryCount].BaseAddress = 0x1000000;
-        BiosMemoryMap[EntryCount].Length = ExtendedMemorySizeAtSixteenMB * 64 * 1024;
-        BiosMemoryMap[EntryCount].Type = BiosMemoryUsable;
+        PcBiosMemoryMap[EntryCount].BaseAddress = 0x1000000;
+        PcBiosMemoryMap[EntryCount].Length = ExtendedMemorySizeAtSixteenMB * 64 * 1024;
+        PcBiosMemoryMap[EntryCount].Type = BiosMemoryUsable;
         EntryCount++;
       }
     }
 
-  return EntryCount;
+  *MemoryMapSize = EntryCount;
+
+  return PcBiosMemoryMap;
 }
 
 /* EOF */

reactos/boot/freeldr/freeldr/arch/i386/xboxmem.c

@@ -75,31 +75,24 @@ XboxMemInit(VOID)
   AvailableMemoryMb = InstalledMemoryMb;
 }
 
-ULONG
-XboxMemGetMemoryMap(PBIOS_MEMORY_MAP BiosMemoryMap, ULONG MaxMemoryMapSize)
-{
-  ULONG EntryCount = 0;
+BIOS_MEMORY_MAP BiosMemoryMap[2];
 
+PBIOS_MEMORY_MAP
+XboxMemGetMemoryMap(ULONG *MemoryMapSize)
+{
   /* Synthesize memory map */
-  if (1 <= MaxMemoryMapSize)
-    {
       /* Available RAM block */
       BiosMemoryMap[0].BaseAddress = 0;
       BiosMemoryMap[0].Length = AvailableMemoryMb * 1024 * 1024;
       BiosMemoryMap[0].Type = BiosMemoryUsable;
-      EntryCount = 1;
-    }
 
-  if (2 <= MaxMemoryMapSize)
-    {
       /* Video memory */
       BiosMemoryMap[1].BaseAddress = AvailableMemoryMb * 1024 * 1024;
       BiosMemoryMap[1].Length = (InstalledMemoryMb - AvailableMemoryMb) * 1024 * 1024;
       BiosMemoryMap[1].Type = BiosMemoryReserved;
-      EntryCount = 2;
-    }
 
-  return EntryCount;
+  *MemoryMapSize = 2;
+  return BiosMemoryMap;
 }
 
 PVOID

reactos/boot/freeldr/freeldr/include/arch/i386/machxbox.h

@@ -49,7 +49,7 @@ VOID XboxPrepareForReactOS(IN BOOLEAN Setup);
 
 VOID XboxMemInit(VOID);
 PVOID XboxMemReserveMemory(ULONG MbToReserve);
-ULONG XboxMemGetMemoryMap(PBIOS_MEMORY_MAP BiosMemoryMap, ULONG MaxMemoryMapSize);
+PBIOS_MEMORY_MAP XboxMemGetMemoryMap(ULONG *MemoryMapSize);
 
 BOOLEAN XboxDiskReadLogicalSectors(UCHAR DriveNumber, ULONGLONG SectorNumber, ULONG SectorCount, PVOID Buffer);
 BOOLEAN XboxDiskGetPartitionEntry(UCHAR DriveNumber, ULONG PartitionNumber, PPARTITION_TABLE_ENTRY PartitionTableEntry);

reactos/boot/freeldr/freeldr/include/arch/pc/machpc.h

@@ -46,7 +46,7 @@ VOID PcVideoSync(VOID);
 VOID PcVideoPrepareForReactOS(IN BOOLEAN Setup);
 VOID PcPrepareForReactOS(IN BOOLEAN Setup);
 
-ULONG PcMemGetMemoryMap(PBIOS_MEMORY_MAP BiosMemoryMap, ULONG MaxMemoryMapSize);
+PBIOS_MEMORY_MAP PcMemGetMemoryMap(ULONG *MemoryMapSize);
 
 BOOLEAN PcDiskGetBootPath(char *BootPath, unsigned Size);
 BOOLEAN PcDiskReadLogicalSectors(UCHAR DriveNumber, ULONGLONG SectorNumber, ULONG SectorCount, PVOID Buffer);
@@ -58,4 +58,7 @@ TIMEINFO* PcGetTime(VOID);
 
 PCONFIGURATION_COMPONENT_DATA PcHwDetect(VOID);
 
+extern BIOS_MEMORY_MAP PcBiosMemoryMap[];
+extern ULONG PcBiosMapCount;
+
 /* EOF */

reactos/boot/freeldr/freeldr/include/machine.h

@@ -59,7 +59,7 @@ typedef struct tagMACHVTBL
   VOID (*PrepareForReactOS)(IN BOOLEAN Setup);
 
   MEMORY_DESCRIPTOR* (*GetMemoryDescriptor)(MEMORY_DESCRIPTOR* Current);
-  ULONG (*GetMemoryMap)(PBIOS_MEMORY_MAP BiosMemoryMap, ULONG MaxMemoryMapSize);
+  PBIOS_MEMORY_MAP (*GetMemoryMap)(PULONG MemoryMapSize);
 
   BOOLEAN (*DiskGetBootPath)(char *BootPath, unsigned Size);
   BOOLEAN (*DiskReadLogicalSectors)(UCHAR DriveNumber, ULONGLONG SectorNumber, ULONG SectorCount, PVOID Buffer);

reactos/boot/freeldr/freeldr/mm/meminit.c

@@ -124,7 +124,7 @@ const MEMORY_DESCRIPTOR*
 ArcGetMemoryDescriptor(const MEMORY_DESCRIPTOR* Current)
 {
     MEMORY_DESCRIPTOR_INT* CurrentDescriptor;
-    BIOS_MEMORY_MAP BiosMemoryMap[32];
+    PBIOS_MEMORY_MAP BiosMemoryMap;
     static ULONG BiosMemoryMapEntryCount;
     static MEMORY_DESCRIPTOR_INT BiosMemoryDescriptors[32];
     static BOOLEAN MemoryMapInitialized = FALSE;
@@ -138,10 +138,7 @@ ArcGetMemoryDescriptor(const MEMORY_DESCRIPTOR* Current)
         //
         // Get the machine generated memory map
         //
-        RtlZeroMemory(BiosMemoryMap, sizeof(BIOS_MEMORY_MAP) * 32);
-        BiosMemoryMapEntryCount = MachVtbl.GetMemoryMap(BiosMemoryMap,
-                                                        sizeof(BiosMemoryMap) /
-                                                        sizeof(BIOS_MEMORY_MAP));
+        BiosMemoryMap = MachVtbl.GetMemoryMap(&BiosMemoryMapEntryCount);
 
         //
         // Fix entries that are not page aligned
@@ -545,6 +542,7 @@ VOID MmMarkPagesInLookupTable(PVOID PageLookupTable, ULONG StartPage, ULONG Page
 {
 	PPAGE_LOOKUP_TABLE_ITEM		RealPageLookupTable = (PPAGE_LOOKUP_TABLE_ITEM)PageLookupTable;
 	ULONG							Index;
+	TRACE("MmMarkPagesInLookupTable()\n");
 
     StartPage -= MmLowestPhysicalPage;
 	for (Index=StartPage; Index<(StartPage+PageCount); Index++)