Code | POST Routine Description |
0x28 | Enable all clocks on populated rows |
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|
0x29 | Perform JEDEC memory initialization for all memory rows |
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|
0x30 | Perform steps required after memory init |
0x31 | Program DRAM throttling and throttling event registers |
|
|
0x32 | Setup DRAM control register for normal operation and enable |
|
|
0x33 | Enable RCOMP |
|
|
0x34 | Clear DRAM initialization bit in the SB |
|
|
0x35 | Initialization Sequence Completed, program graphic clocks |
|
|
0xAF | Disable access to the XMM registers |
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|
BDS & Specific action:
Code | POST Routine 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 |
|
|
0x70 | Simple Text Output Protocol Functions(VGA class reset) |
|
|
0x71 | Report that VGA Class driver is being disabled |
|
|
0x72 | Report that VGA Class driver is being enabled |
|
|
0x78 | Terminal Console In reset and Console Out reset |
|
|
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 |
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|
78 | Chapter 4 |
