mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-24 11:45:27 +01:00
42 lines
1.2 KiB
Plaintext
42 lines
1.2 KiB
Plaintext
|
|
=== HOW TO USE VTF0 ===
|
|
|
|
Add this line to your FDF FV section:
|
|
INF RuleOverride=RESET_VECTOR USE = IA32 CloverEFI/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.inf
|
|
(For X64 SEC/PEI change IA32 to X64 => 'USE = X64')
|
|
|
|
In your FDF FFS file rules sections add:
|
|
[Rule.Common.SEC.RESET_VECTOR]
|
|
FILE RAW = $(NAMED_GUID) {
|
|
RAW RAW |.raw
|
|
}
|
|
|
|
=== VTF0 Boot Flow ===
|
|
|
|
1. Transition to IA32 flat mode
|
|
2. Locate BFV (Boot Firmware Volume) by checking every 4kb boundary
|
|
3. Locate SEC image
|
|
4. X64 VTF0 transitions to X64 mode
|
|
5. Call SEC image entry point
|
|
|
|
== VTF0 SEC input parameters ==
|
|
|
|
All inputs to SEC image are register based:
|
|
EAX/RAX - Initial value of the EAX register (BIST: Built-in Self Test)
|
|
DI - 'BP': boot-strap processor, or 'AP': application processor
|
|
EBP/RBP - Pointer to the start of the Boot Firmware Volume
|
|
|
|
=== HOW TO BUILD VTF0 ===
|
|
|
|
Dependencies:
|
|
* Python 2.5~2.7
|
|
* Nasm 2.03 or newer
|
|
|
|
To rebuild the VTF0 binaries:
|
|
1. Change to VTF0 source dir: UefiCpuPkg/ResetVector/Vtf0
|
|
2. nasm and python should be in executable path
|
|
3. Run this command:
|
|
python Build.py
|
|
4. Binaries output will be in UefiCpuPkg/ResetVector/Vtf0/Bin
|
|
|