UEFI Debugging - Lauterbach
UEFI Debugging - Lauterbach
UEFI Debugging - Lauterbach
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▪ Rudi Dienstbeck ▪<br />
<strong>UEFI</strong> <strong>Debugging</strong><br />
<strong>UEFI</strong> – A New BIOS: Workflow<br />
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SEC Phase (Security)<br />
<br />
Provides microcode updates and security checks<br />
PEI Phase (Pre-EFI Initialization)<br />
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Provides basic run-time environment (e.g. initializes RAM)<br />
DXE Phase (Driver Execution Environment)<br />
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Driver Execution Environment<br />
Starts device drivers and DXE applications (e.g. EFI Shell)<br />
BDS Phase (Boot Device Selection)<br />
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Selects the OS to boot and hands over control to OS<br />
2013 /July /08 ▪ 7 / 18
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