BaseTools: change the Division Operator

PEP 238 -- Changing the Division Operator
x/y to return a reasonable approximation of the mathematical result
    of the division ("true division")
x//y to return the floor ("floor division")

Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Zhiju.Fan <zhijux.fan@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Bob Feng <bob.c.feng@intel.com>

14 files changed, 49 insertions, 42 deletions

diff --git a/BaseTools/Source/Python/AutoGen/AutoGen.py b/BaseTools/Source/Python/AutoGen/AutoGen.py
index f9ce17cf77..5f0da5a815 100644
--- a/BaseTools/Source/Python/AutoGen/AutoGen.py
+++ b/BaseTools/Source/Python/AutoGen/AutoGen.py
@@ -3814,7 +3814,7 @@ class ModuleAutoGen(AutoGen):
                         Padding = '0x00, '

                         if Unicode:

                             Padding = Padding * 2

-                            ArraySize = ArraySize / 2

+                            ArraySize = ArraySize // 2

                         if ArraySize < (len(PcdValue) + 1):

                             if Pcd.MaxSizeUserSet:

                                 EdkLogger.error("build", AUTOGEN_ERROR,

diff --git a/BaseTools/Source/Python/AutoGen/GenC.py b/BaseTools/Source/Python/AutoGen/GenC.py
index 915ba2e235..e46942a3e2 100644
--- a/BaseTools/Source/Python/AutoGen/GenC.py
+++ b/BaseTools/Source/Python/AutoGen/GenC.py
@@ -1053,7 +1053,7 @@ def CreateModulePcdCode(Info, AutoGenC, AutoGenH, Pcd):
                     else:

                         NewValue = NewValue + str(ord(Value[Index]) % 0x100) + ', '

                 if Unicode:

-                    ArraySize = ArraySize / 2

+                    ArraySize = ArraySize // 2

                 Value = NewValue + '0 }'

             if ArraySize < ValueSize:

                 if Pcd.MaxSizeUserSet:

@@ -1063,7 +1063,7 @@ def CreateModulePcdCode(Info, AutoGenC, AutoGenH, Pcd):
                 else:

                     ArraySize = Pcd.GetPcdSize()

                     if Unicode:

-                        ArraySize = ArraySize / 2

+                        ArraySize = ArraySize // 2

             Array = '[%d]' % ArraySize

         #

         # skip casting for fixed at build since it breaks ARM assembly.

@@ -1906,7 +1906,7 @@ def BmpImageDecoder(File, Buffer, PaletteIndex, TransParent):
         else:

             ImageBuffer = pack('B', EFI_HII_IIBT_IMAGE_1BIT)

         ImageBuffer += pack('B', PaletteIndex)

-        Width = (BmpHeader.biWidth + 7)/8

+        Width = (BmpHeader.biWidth + 7)//8

         if BmpHeader.bfOffBits > BMP_IMAGE_HEADER_STRUCT.size + 2:

             PaletteBuffer = Buffer[BMP_IMAGE_HEADER_STRUCT.size + 2 : BmpHeader.bfOffBits]

     elif BmpHeader.biBitCount == 4:

@@ -1915,7 +1915,7 @@ def BmpImageDecoder(File, Buffer, PaletteIndex, TransParent):
         else:

             ImageBuffer = pack('B', EFI_HII_IIBT_IMAGE_4BIT)

         ImageBuffer += pack('B', PaletteIndex)

-        Width = (BmpHeader.biWidth + 1)/2

+        Width = (BmpHeader.biWidth + 1)//2

         if BmpHeader.bfOffBits > BMP_IMAGE_HEADER_STRUCT.size + 2:

             PaletteBuffer = Buffer[BMP_IMAGE_HEADER_STRUCT.size + 2 : BmpHeader.bfOffBits]

     elif BmpHeader.biBitCount == 8:

diff --git a/BaseTools/Source/Python/BPDG/GenVpd.py b/BaseTools/Source/Python/BPDG/GenVpd.py
index 71fcfc5ac3..b4a2dd25a2 100644
--- a/BaseTools/Source/Python/BPDG/GenVpd.py
+++ b/BaseTools/Source/Python/BPDG/GenVpd.py
@@ -431,7 +431,7 @@ class GenVPD :
                             EdkLogger.error("BPDG", BuildToolError.FORMAT_INVALID, 'The offset value of PCD %s should be %s-byte aligned.' % (PCD.PcdCName, Alignment))

                 else:

                     if PCD.PcdOccupySize % Alignment != 0:

-                        PCD.PcdOccupySize = (PCD.PcdOccupySize / Alignment + 1) * Alignment

+                        PCD.PcdOccupySize = (PCD.PcdOccupySize // Alignment + 1) * Alignment

 

                 PackSize = PCD.PcdOccupySize

                 if PCD._IsBoolean(PCD.PcdValue, PCD.PcdSize):

@@ -509,7 +509,7 @@ class GenVPD :
             NowOffset = 0

             for Pcd in self.PcdUnknownOffsetList :

                 if NowOffset % Pcd.Alignment != 0:

-                    NowOffset = (NowOffset/ Pcd.Alignment + 1) * Pcd.Alignment

+                    NowOffset = (NowOffset// Pcd.Alignment + 1) * Pcd.Alignment

                 Pcd.PcdBinOffset = NowOffset

                 Pcd.PcdOffset    = str(hex(Pcd.PcdBinOffset))

                 NowOffset       += Pcd.PcdOccupySize

@@ -573,7 +573,7 @@ class GenVPD :
                         # Not been fixed

                         if eachUnfixedPcd.PcdOffset == TAB_STAR :

                             if LastOffset % eachUnfixedPcd.Alignment != 0:

-                                LastOffset = (LastOffset / eachUnfixedPcd.Alignment + 1) * eachUnfixedPcd.Alignment

+                                LastOffset = (LastOffset // eachUnfixedPcd.Alignment + 1) * eachUnfixedPcd.Alignment

                             # The offset un-fixed pcd can write into this free space

                             if needFixPcdSize <= (NowOffset - LastOffset) :

                                 # Change the offset value of un-fixed pcd

@@ -627,7 +627,7 @@ class GenVPD :
 

             NeedFixPcd.PcdBinOffset = LastPcd.PcdBinOffset + LastPcd.PcdOccupySize

             if NeedFixPcd.PcdBinOffset % NeedFixPcd.Alignment != 0:

-                NeedFixPcd.PcdBinOffset = (NeedFixPcd.PcdBinOffset / NeedFixPcd.Alignment + 1) * NeedFixPcd.Alignment

+                NeedFixPcd.PcdBinOffset = (NeedFixPcd.PcdBinOffset // NeedFixPcd.Alignment + 1) * NeedFixPcd.Alignment

 

             NeedFixPcd.PcdOffset    = str(hex(NeedFixPcd.PcdBinOffset))

 

diff --git a/BaseTools/Source/Python/Common/Expression.py b/BaseTools/Source/Python/Common/Expression.py
index 19ea13b7fb..0c7e25b445 100644
--- a/BaseTools/Source/Python/Common/Expression.py
+++ b/BaseTools/Source/Python/Common/Expression.py
@@ -439,6 +439,13 @@ class ValueExpression(BaseExpression):
                 else:

                     Val = Val3

                 continue

+            #

+            # PEP 238 -- Changing the Division Operator

+            # x/y to return a reasonable approximation of the mathematical result of the division ("true division")

+            # x//y to return the floor ("floor division")

+            #

+            if Op == '/':

+                Op = '//'

             try:

                 Val = self.Eval(Op, Val, EvalFunc())

             except WrnExpression as Warn:

@@ -912,7 +919,7 @@ class ValueExpressionEx(ValueExpression):
                         if TmpValue.bit_length() == 0:

                             PcdValue = '{0x00}'

                         else:

-                            for I in range((TmpValue.bit_length() + 7) / 8):

+                            for I in range((TmpValue.bit_length() + 7) // 8):

                                 TmpList.append('0x%02x' % ((TmpValue >> I * 8) & 0xff))

                             PcdValue = '{' + ', '.join(TmpList) + '}'

                     except:

diff --git a/BaseTools/Source/Python/Common/Misc.py b/BaseTools/Source/Python/Common/Misc.py
index d23a075f43..bd7c2812e8 100644
--- a/BaseTools/Source/Python/Common/Misc.py
+++ b/BaseTools/Source/Python/Common/Misc.py
@@ -1025,7 +1025,7 @@ def ParseFieldValue (Value):
     if "{CODE(" in Value:

         return Value, len(Value.split(","))

     if isinstance(Value, type(0)):

-        return Value, (Value.bit_length() + 7) / 8

+        return Value, (Value.bit_length() + 7) // 8

     if not isinstance(Value, type('')):

         raise BadExpression('Type %s is %s' %(Value, type(Value)))

     Value = Value.strip()

@@ -1146,12 +1146,12 @@ def ParseFieldValue (Value):
             raise BadExpression("invalid hex value: %s" % Value)

         if Value == 0:

             return 0, 1

-        return Value, (Value.bit_length() + 7) / 8

+        return Value, (Value.bit_length() + 7) // 8

     if Value[0].isdigit():

         Value = int(Value, 10)

         if Value == 0:

             return 0, 1

-        return Value, (Value.bit_length() + 7) / 8

+        return Value, (Value.bit_length() + 7) // 8

     if Value.lower() == 'true':

         return 1, 1

     if Value.lower() == 'false':

diff --git a/BaseTools/Source/Python/GenFds/DataSection.py b/BaseTools/Source/Python/GenFds/DataSection.py
index 28f9b931ca..989e33c43f 100644
--- a/BaseTools/Source/Python/GenFds/DataSection.py
+++ b/BaseTools/Source/Python/GenFds/DataSection.py
@@ -88,9 +88,9 @@ class DataSection (DataSectionClassObject):
             if ImageObj.SectionAlignment < 0x400:

                 self.Alignment = str (ImageObj.SectionAlignment)

             elif ImageObj.SectionAlignment < 0x100000:

-                self.Alignment = str (ImageObj.SectionAlignment / 0x400) + 'K'

+                self.Alignment = str (ImageObj.SectionAlignment // 0x400) + 'K'

             else:

-                self.Alignment = str (ImageObj.SectionAlignment / 0x100000) + 'M'

+                self.Alignment = str (ImageObj.SectionAlignment // 0x100000) + 'M'

 

         NoStrip = True

         if self.SecType in (BINARY_FILE_TYPE_TE, BINARY_FILE_TYPE_PE32):

diff --git a/BaseTools/Source/Python/GenFds/EfiSection.py b/BaseTools/Source/Python/GenFds/EfiSection.py
index 0be176ec8a..dfb2470874 100644
--- a/BaseTools/Source/Python/GenFds/EfiSection.py
+++ b/BaseTools/Source/Python/GenFds/EfiSection.py
@@ -248,9 +248,9 @@ class EfiSection (EfiSectionClassObject):
                         if ImageObj.SectionAlignment < 0x400:

                             Align = str (ImageObj.SectionAlignment)

                         elif ImageObj.SectionAlignment < 0x100000:

-                            Align = str (ImageObj.SectionAlignment / 0x400) + 'K'

+                            Align = str (ImageObj.SectionAlignment // 0x400) + 'K'

                         else:

-                            Align = str (ImageObj.SectionAlignment / 0x100000) + 'M'

+                            Align = str (ImageObj.SectionAlignment // 0x100000) + 'M'

 

                     if File[(len(File)-4):] == '.efi':

                         MapFile = File.replace('.efi', '.map')

diff --git a/BaseTools/Source/Python/GenFds/FfsInfStatement.py b/BaseTools/Source/Python/GenFds/FfsInfStatement.py
index 4dda3cf787..a7298a6daf 100644
--- a/BaseTools/Source/Python/GenFds/FfsInfStatement.py
+++ b/BaseTools/Source/Python/GenFds/FfsInfStatement.py
@@ -772,9 +772,9 @@ class FfsInfStatement(FfsInfStatementClassObject):
                     if ImageObj.SectionAlignment < 0x400:

                         self.Alignment = str (ImageObj.SectionAlignment)

                     elif ImageObj.SectionAlignment < 0x100000:

-                        self.Alignment = str (ImageObj.SectionAlignment / 0x400) + 'K'

+                        self.Alignment = str (ImageObj.SectionAlignment // 0x400) + 'K'

                     else:

-                        self.Alignment = str (ImageObj.SectionAlignment / 0x100000) + 'M'

+                        self.Alignment = str (ImageObj.SectionAlignment // 0x100000) + 'M'

 

                 if not NoStrip:

                     FileBeforeStrip = os.path.join(self.OutputPath, ModuleName + '.reloc')

@@ -814,9 +814,9 @@ class FfsInfStatement(FfsInfStatementClassObject):
                 if ImageObj.SectionAlignment < 0x400:

                     self.Alignment = str (ImageObj.SectionAlignment)

                 elif ImageObj.SectionAlignment < 0x100000:

-                    self.Alignment = str (ImageObj.SectionAlignment / 0x400) + 'K'

+                    self.Alignment = str (ImageObj.SectionAlignment // 0x400) + 'K'

                 else:

-                    self.Alignment = str (ImageObj.SectionAlignment / 0x100000) + 'M'

+                    self.Alignment = str (ImageObj.SectionAlignment // 0x100000) + 'M'

 

             if not NoStrip:

                 FileBeforeStrip = os.path.join(self.OutputPath, ModuleName + '.reloc')

diff --git a/BaseTools/Source/Python/GenFds/Fv.py b/BaseTools/Source/Python/GenFds/Fv.py
index bd5c259348..b141d44dc4 100644
--- a/BaseTools/Source/Python/GenFds/Fv.py
+++ b/BaseTools/Source/Python/GenFds/Fv.py
@@ -222,9 +222,9 @@ class FV (object):
                             #The max alignment supported by FFS is 16M.

                                 self.FvAlignment = "16M"

                             else:

-                                self.FvAlignment = str(FvAlignmentValue / 0x100000) + "M"

+                                self.FvAlignment = str(FvAlignmentValue // 0x100000) + "M"

                         else:

-                            self.FvAlignment = str(FvAlignmentValue / 0x400) + "K"

+                            self.FvAlignment = str(FvAlignmentValue // 0x400) + "K"

                     else:

                         # FvAlignmentValue is less than 1K

                         self.FvAlignment = str (FvAlignmentValue)

diff --git a/BaseTools/Source/Python/GenFds/FvImageSection.py b/BaseTools/Source/Python/GenFds/FvImageSection.py
index 7f277ddef2..535b86ab5e 100644
--- a/BaseTools/Source/Python/GenFds/FvImageSection.py
+++ b/BaseTools/Source/Python/GenFds/FvImageSection.py
@@ -71,7 +71,7 @@ class FvImageSection(FvImageSectionClassObject):
                     # PI FvHeader is 0x48 byte

                     FvHeaderBuffer = FvFileObj.read(0x48)

                     # FV alignment position.

-                    FvAlignmentValue = 1 << (ord (FvHeaderBuffer[0x2E]) & 0x1F)

+                    FvAlignmentValue = 1 << (FvHeaderBuffer[0x2E] & 0x1F)

                     FvFileObj.close()

                 if FvAlignmentValue > MaxFvAlignment:

                     MaxFvAlignment = FvAlignmentValue

@@ -87,9 +87,9 @@ class FvImageSection(FvImageSectionClassObject):
                     if MaxFvAlignment >= 0x1000000:

                         self.Alignment = "16M"

                     else:

-                        self.Alignment = str(MaxFvAlignment / 0x100000) + "M"

+                        self.Alignment = str(MaxFvAlignment // 0x100000) + "M"

                 else:

-                    self.Alignment = str (MaxFvAlignment / 0x400) + "K"

+                    self.Alignment = str (MaxFvAlignment // 0x400) + "K"

             else:

                 # MaxFvAlignment is less than 1K

                 self.Alignment = str (MaxFvAlignment)

@@ -129,9 +129,9 @@ class FvImageSection(FvImageSectionClassObject):
                                 if FvAlignmentValue >= 0x1000000:

                                     self.Alignment = "16M"

                                 else:

-                                    self.Alignment = str(FvAlignmentValue / 0x100000) + "M"

+                                    self.Alignment = str(FvAlignmentValue // 0x100000) + "M"

                             else:

-                                self.Alignment = str (FvAlignmentValue / 0x400) + "K"

+                                self.Alignment = str (FvAlignmentValue // 0x400) + "K"

                         else:

                             # FvAlignmentValue is less than 1K

                             self.Alignment = str (FvAlignmentValue)

diff --git a/BaseTools/Source/Python/GenFds/GenFds.py b/BaseTools/Source/Python/GenFds/GenFds.py
index f1ce527f88..2efb2edd9a 100644
--- a/BaseTools/Source/Python/GenFds/GenFds.py
+++ b/BaseTools/Source/Python/GenFds/GenFds.py
@@ -751,7 +751,7 @@ class GenFds(object):
                                     F.read()

                                     length = F.tell()

                                     F.seek(4)

-                                    TmpStr = unpack('%dh' % ((length - 4) / 2), F.read())

+                                    TmpStr = unpack('%dh' % ((length - 4) // 2), F.read())

                                     Name = ''.join(chr(c) for c in TmpStr[:-1])

                         else:

                             FileList = []

diff --git a/BaseTools/Source/Python/GenFds/Region.py b/BaseTools/Source/Python/GenFds/Region.py
index acc9dea413..83363276d2 100644
--- a/BaseTools/Source/Python/GenFds/Region.py
+++ b/BaseTools/Source/Python/GenFds/Region.py
@@ -300,7 +300,7 @@ class Region(object):
             else:

                 # region ended within current blocks

                 if self.Offset + self.Size <= End:

-                    ExpectedList.append((BlockSize, (RemindingSize + BlockSize - 1) / BlockSize))

+                    ExpectedList.append((BlockSize, (RemindingSize + BlockSize - 1) // BlockSize))

                     break

                 # region not ended yet

                 else:

@@ -309,7 +309,7 @@ class Region(object):
                         UsedBlockNum = BlockNum

                     # region started in middle of current blocks

                     else:

-                        UsedBlockNum = (End - self.Offset) / BlockSize

+                        UsedBlockNum = (End - self.Offset) // BlockSize

                     Start = End

                     ExpectedList.append((BlockSize, UsedBlockNum))

                     RemindingSize -= BlockSize * UsedBlockNum

diff --git a/BaseTools/Source/Python/PatchPcdValue/PatchPcdValue.py b/BaseTools/Source/Python/PatchPcdValue/PatchPcdValue.py
index 8e243aea96..0be5eba492 100644
--- a/BaseTools/Source/Python/PatchPcdValue/PatchPcdValue.py
+++ b/BaseTools/Source/Python/PatchPcdValue/PatchPcdValue.py
@@ -133,7 +133,7 @@ def PatchBinaryFile(FileName, ValueOffset, TypeName, ValueString, MaxSize=0):
         #

         for Index in range(ValueLength):

             ByteList[ValueOffset + Index] = ValueNumber % 0x100

-            ValueNumber = ValueNumber / 0x100

+            ValueNumber = ValueNumber // 0x100

     elif TypeName == TAB_VOID:

         ValueString = SavedStr

         if ValueString.startswith('L"'):

@@ -148,7 +148,7 @@ def PatchBinaryFile(FileName, ValueOffset, TypeName, ValueString, MaxSize=0):
                 if Index + 2 >= ValueLength:

                     break

                 #

-                # Set string value one by one

+                # Set string value one by one/ 0x100

                 #

                 ByteList[ValueOffset + Index] = ord(ByteString)

                 Index = Index + 2

diff --git a/BaseTools/Source/Python/build/build.py b/BaseTools/Source/Python/build/build.py
index 94074b89b4..139a1dfe29 100644
--- a/BaseTools/Source/Python/build/build.py
+++ b/BaseTools/Source/Python/build/build.py
@@ -664,7 +664,7 @@ class PeImageInfo():
         self.OutputDir        = OutputDir

         self.DebugDir         = DebugDir

         self.Image            = ImageClass

-        self.Image.Size       = (self.Image.Size / 0x1000 + 1) * 0x1000

+        self.Image.Size       = (self.Image.Size // 0x1000 + 1) * 0x1000

 

 ## The class implementing the EDK2 build process

 #

@@ -1582,21 +1582,21 @@ class Build():
             for PcdInfo in PcdTable:

                 ReturnValue = 0

                 if PcdInfo[0] == TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_PEI_PAGE_SIZE:

-                    ReturnValue, ErrorInfo = PatchBinaryFile (EfiImage, PcdInfo[1], TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_PEI_PAGE_SIZE_DATA_TYPE, str (PeiSize / 0x1000))

+                    ReturnValue, ErrorInfo = PatchBinaryFile (EfiImage, PcdInfo[1], TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_PEI_PAGE_SIZE_DATA_TYPE, str (PeiSize // 0x1000))

                 elif PcdInfo[0] == TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_DXE_PAGE_SIZE:

-                    ReturnValue, ErrorInfo = PatchBinaryFile (EfiImage, PcdInfo[1], TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_DXE_PAGE_SIZE_DATA_TYPE, str (BtSize / 0x1000))

+                    ReturnValue, ErrorInfo = PatchBinaryFile (EfiImage, PcdInfo[1], TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_DXE_PAGE_SIZE_DATA_TYPE, str (BtSize // 0x1000))

                 elif PcdInfo[0] == TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_RUNTIME_PAGE_SIZE:

-                    ReturnValue, ErrorInfo = PatchBinaryFile (EfiImage, PcdInfo[1], TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_RUNTIME_PAGE_SIZE_DATA_TYPE, str (RtSize / 0x1000))

+                    ReturnValue, ErrorInfo = PatchBinaryFile (EfiImage, PcdInfo[1], TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_RUNTIME_PAGE_SIZE_DATA_TYPE, str (RtSize // 0x1000))

                 elif PcdInfo[0] == TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_SMM_PAGE_SIZE and len (SmmModuleList) > 0:

-                    ReturnValue, ErrorInfo = PatchBinaryFile (EfiImage, PcdInfo[1], TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_SMM_PAGE_SIZE_DATA_TYPE, str (SmmSize / 0x1000))

+                    ReturnValue, ErrorInfo = PatchBinaryFile (EfiImage, PcdInfo[1], TAB_PCDS_PATCHABLE_LOAD_FIX_ADDRESS_SMM_PAGE_SIZE_DATA_TYPE, str (SmmSize // 0x1000))

                 if ReturnValue != 0:

                     EdkLogger.error("build", PARAMETER_INVALID, "Patch PCD value failed", ExtraData=ErrorInfo)

 

-        MapBuffer.write('PEI_CODE_PAGE_NUMBER      = 0x%x\n' % (PeiSize / 0x1000))

-        MapBuffer.write('BOOT_CODE_PAGE_NUMBER     = 0x%x\n' % (BtSize / 0x1000))

-        MapBuffer.write('RUNTIME_CODE_PAGE_NUMBER  = 0x%x\n' % (RtSize / 0x1000))

+        MapBuffer.write('PEI_CODE_PAGE_NUMBER      = 0x%x\n' % (PeiSize // 0x1000))

+        MapBuffer.write('BOOT_CODE_PAGE_NUMBER     = 0x%x\n' % (BtSize // 0x1000))

+        MapBuffer.write('RUNTIME_CODE_PAGE_NUMBER  = 0x%x\n' % (RtSize // 0x1000))

         if len (SmmModuleList) > 0:

-            MapBuffer.write('SMM_CODE_PAGE_NUMBER      = 0x%x\n' % (SmmSize / 0x1000))

+            MapBuffer.write('SMM_CODE_PAGE_NUMBER      = 0x%x\n' % (SmmSize // 0x1000))

 

         PeiBaseAddr = TopMemoryAddress - RtSize - BtSize

         BtBaseAddr  = TopMemoryAddress - RtSize