Code | Description |
|
|
0x24 | Program ODT |
0x25 | Perform steps required before memory init |
|
|
0x26 | Program the receive enable reference timing control register |
| Program the DLL Timing Control Registers, RCOMP settings |
|
|
0x27 | Enable DRAM Channel I/O Buffers |
|
|
0x28 | Enable all clocks on populated rows |
|
|
0x29 | Perform JEDEC memory initialization for all memory rows |
|
|
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 |
|
|
0x43 | Program Thermal Throttling |
|
|
BDS & Specific action:
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 |
|
|
162 | Chapter 4 |
