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Chapter 4 172
BDS & Specific action:
Each PEIM entry point used in 80_PORT
Post Code Description
0x00 Report the legacy boot is happening
0x12 Wake up the Aps
0x13 Initialize SMM Private Data and relocate BSP SMBASE
0x21 PC init begin at the stage1
0x27 Report every memory range do the hard ware ECC init
0x28 Report status code of every memory range
0x50 Get the root bridge handle
0x51 Notify pci bus driver starts to program the resource
0x58 Reset the host controller
0x5A IdeBus begin initialization
0x79 Report that the remote terminal is being disabled
0x7A Report that the remote terminal is being enabled
0x90 Keyboard reset
0x91 USB Keyboard disable
0x92 Keyboard detection
0x93 Report that the usb keyboard is being enabled
0x94 Clear the keyboard buffer
0x95 Init Keyboard
0x98 Mouse reset
0x99 Mouse disable
0x9A Detect PS2 mouse
0x9B Report that the mouse is being enabled
0xB8 Peripheral removable media reset(ex:IsaFloppy, USB device)
0xB9 Peripheral removable media disable
0xBB Peripheral removable media enable
0xE4 Report Status Code here for DXE_ENTRY_POINT once it is available
0xF8 Report that ExitBootServices() has been called
0xF9 Runtime driver set virtual address map
Post Code Description
0x00
0x01 PEI_EVENT_LOG
0xA1 PEI_OEM_SERVICE
0xA2 PEI_SIO_INIT
0xA3 PEI_MONO_STATUS_CODE
0xA4 PEI_CPU_IO_PCI_CFG
0x06 PEI_CPU_IO
0x07 PEI_PCI_CFG
0xA5 PEI_CPU_PEIM
0xA6 PEI_PLATFORM_STAGE1
0xA7 PEI_VARIABLE