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Filter out unused region in SPI descriptor for IfwiUtility.py

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This patch removes unused regions in SPI descriptor so that the
IFWI layout can be printed correctly even when some region is
disbled.

Signed-off-by: Maurice Ma <maurice.ma@intel.com>
This commit is contained in:
Maurice Ma
2019-10-04 20:13:04 -07:00
parent f8842039ef
commit b70073d456
1 changed files with 3 additions and 2 deletions
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BootloaderCorePkg/Tools/IfwiUtility.py
+3 -2
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@@ -348,11 +348,12 @@ class IFWI_PARSER:
@staticmethod
def find_ifwi_region (spi_descriptor, rgn_name):
frba = ((spi_descriptor.fl_map0 >> 16) & 0xFF) << 4
fl_reg = spi_descriptor.FLASH_REGIONS[rgn_name] + frba
reg_off = spi_descriptor.FLASH_REGIONS[rgn_name]
fl_reg = reg_off + frba
rgn_off = c_uint32.from_buffer(spi_descriptor, fl_reg)
rgn_base = (rgn_off.value & 0x7FFF) << 12
rgn_limit = ((rgn_off.value & 0x7FFF0000) >> 4) | 0xFFF
if rgn_limit <= rgn_base:
if (reg_off > 0 and rgn_off.value == 0) or (rgn_off.value == 0xFFFFFFFF) or (rgn_limit <= rgn_base):
return None, None
else:
return (rgn_base, rgn_limit)