1 files changed, 51 insertions, 0 deletions
diff --git a/roms/edk2/BaseTools/Source/Python/Common/VariableAttributes.py b/roms/edk2/BaseTools/Source/Python/Common/VariableAttributes.py
new file mode 100644
index 000000000..90c43f87d
--- /dev/null
+++ b/roms/edk2/BaseTools/Source/Python/Common/VariableAttributes.py
@@ -0,0 +1,51 @@
+# # @file
+#
+# This file is used to handle the variable attributes and property information
+#
+#
+# Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+
+class VariableAttributes(object):
+    EFI_VARIABLE_NON_VOLATILE = 0x00000001
+    EFI_VARIABLE_BOOTSERVICE_ACCESS = 0x00000002
+    EFI_VARIABLE_RUNTIME_ACCESS = 0x00000004
+    VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY = 0x00000001
+    VarAttributesMap = {
+                     "NV":EFI_VARIABLE_NON_VOLATILE,
+                     "BS":EFI_VARIABLE_BOOTSERVICE_ACCESS,
+                     "RT":EFI_VARIABLE_RUNTIME_ACCESS,
+                     "RO":VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY
+                     }
+
+    def __init__(self):
+        pass
+
+    @staticmethod
+    def GetVarAttributes(var_attr_str):
+        VarAttr = 0x00000000
+        VarProp = 0x00000000
+
+        attr_list = var_attr_str.split(",")
+        for attr in attr_list:
+            attr = attr.strip()
+            if attr == 'RO':
+                VarProp = VariableAttributes.VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY
+            else:
+                VarAttr = VarAttr | VariableAttributes.VarAttributesMap.get(attr, 0x00000000)
+        return VarAttr, VarProp
+    @staticmethod
+    def ValidateVarAttributes(var_attr_str):
+        if not var_attr_str:
+            return True, ""
+        attr_list = var_attr_str.split(",")
+        attr_temp = []
+        for attr in attr_list:
+            attr = attr.strip()
+            attr_temp.append(attr)
+            if attr not in VariableAttributes.VarAttributesMap:
+                return False, "The variable attribute %s is not support to be specified in dsc file. Supported variable attribute are ['BS','NV','RT','RO'] "
+        if 'RT' in attr_temp and 'BS' not in attr_temp:
+            return False, "the RT attribute need the BS attribute to be present"
+        return True, ""