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Get extended BIOS R/W access information

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Use the Flash Descriptor Observability registers to OR in the settings
from the flash descriptor to the existing FRAP register fields.

Signed-off-by: Erik Bjorge <erik.c.bjorge@intel.com>
This commit is contained in:
Erik Bjorge
2019-10-31 15:46:24 -07:00
committed by BrentHoltsclaw
parent 6817e43149
commit 40ff7cffbf
2 changed files with 10 additions and 0 deletions
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chipsec/hal/spi.py
+5
View File
@@ -364,6 +364,11 @@ class SPI(hal_base.HALBase):
brwa = self.cs.get_register_field('FRAP', fracc, 'BRWA' )
bmrag = self.cs.get_register_field('FRAP', fracc, 'BMRAG' )
bmwag = self.cs.get_register_field('FRAP', fracc, 'BMWAG' )
if self.cs.is_register_defined('FDOC') and self.cs.is_register_defined('FDOD'):
self.cs.write_register('FDOC', 0x3000)
tmp_reg = self.cs.read_register('FDOD')
brra |= ((tmp_reg >> 8) & 0xFFF)
brwa |= ((tmp_reg >> 20) & 0xFFF)
logger().log( '' )
logger().log( "BIOS Region Write Access Grant ({:02X}):".format(bmwag) )
regions = self.get_SPI_regions()
chipsec/modules/common/spi_access.py
+5
View File
@@ -51,6 +51,11 @@ class spi_access(BaseModule):
frap = self.cs.read_register( 'FRAP' )
brra = self.cs.get_register_field( 'FRAP', frap, 'BRRA' )
brwa = self.cs.get_register_field( 'FRAP', frap, 'BRWA' )
if self.cs.is_register_defined('FDOC') and self.cs.is_register_defined('FDOD'):
self.cs.write_register('FDOC', 0x3000)
tmp_reg = self.cs.read_register('FDOD')
brra |= ((tmp_reg >> 8) & 0xFFF)
brwa |= ((tmp_reg >> 20) & 0xFFF)
# Informational
# CPU/Software access to Platform Data region (platform specific)