diff --git a/src/xmlcli/XmlCliLib.py b/src/xmlcli/XmlCliLib.py
index 2d5b753..c9cb9e3 100644
--- a/src/xmlcli/XmlCliLib.py
+++ b/src/xmlcli/XmlCliLib.py
@@ -123,6 +123,10 @@
 CliSpecMajorVersion             = 0x00
 CliSpecMinorVersion             = 0x00
 
+MAXIMUM_BIOS_MEMORY_MAP         = 0xFFFFFFFF
+PAGE_SIZE                       = 0x1000
+FIRMWARE_BASE_MASK_ALIGNMENT    = (MAXIMUM_BIOS_MEMORY_MAP - PAGE_SIZE + 0x1)
+
 CliCmdDict = {APPEND_BIOS_KNOBS_CMD_ID: 'APPEND_BIOS_KNOBS_CMD_ID', RESTOREMODIFY_KNOBS_CMD_ID: 'RESTOREMODIFY_KNOBS_CMD_ID',
               READ_BIOS_KNOBS_CMD_ID  : 'READ_BIOS_KNOBS_CMD_ID', LOAD_DEFAULT_KNOBS_CMD_ID: 'LOAD_DEFAULT_KNOBS_CMD_ID',
               PROG_BIOS_CMD_ID        : 'PROG_BIOS_CMD_ID', FETCH_BIOS_CMD_ID: 'FETCH_BIOS_CMD_ID',