Dxe Phase - Seagate Exos AP 4U100 Installation And Maintenance Manual

POST Code Definition
0x8C
0x8D

DXE Phase

In DXE (Driver Execution Environment) phase, the system travels from a stage where permanent memory is available to
the stage where firmware is ready to look for a boot device.
The Driver Execution Environment (DXE) phase contains an implementation of UEFI that is compliant with the UEFI 2.0+
Specification. As a result, both the DXE Foundation and DXE drivers share many of the attributes of UEFI images. The
DXE phase is the phase where most of the system initialization is performed. The Pre-EFI Initialization (PEI) phase is
responsible for initializing permanent memory in the platform so the DXE phase can be loaded and executed. The state
of the system at the end of the PEI phase is passed to the DXE phase through a list of position-independent data
structures called Hand-Off Blocks (HOBs).
Table 22 DXE phase POST codes
POST Code Definition
0x40
0x41
0x42
0x43
0x44
0x45
0x46
0x47
0x48
0x49
0x4A
0x4B
0x4C
0x4D
0x4E
0x4F
0x50
0x51
0x52
0x53
0x54
0x55
0x56
0x57
0x58
0x59
0x5A
124 BIOS POST Codes
iFFS Transition Start
iFFS Transition End
TPM initial in DXE
South bridge SPI initial
Setup Reset service, DXE_CF9Reset
South bridge Serial GPIO initial, DXE_SB_SerialGPIO_INIT
Setup SMM ACCESS service
North bridge Middle initial
Super I/O DXE initial
Setup Legacy Region service, DXE_LegacyRegion
South Bridge Middle Initial
Identify Flash device
Fault Tolerant Write verification
Variable Service Initial
Fail to initial Variable Service
MTC Initial
CPU Middle Initial
Multi-processor Middle Initial
SMBUS Driver Initial
8259 Initial
RTC Initial
SATA Controller early initial
Setup SMM Control service, DXE_SMMControler_INIT
Setup Legacy Interrupt service, DXE_LegacyInterrupt
Relocate SMM BASE
SMI test
VTD Initial
Legacy BIOS initial
Legacy interrupt function initial