mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-29 12:35:53 +01:00
42 lines
1.2 KiB
Plaintext
Executable File
42 lines
1.2 KiB
Plaintext
Executable File
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=== HOW TO USE VTF0 ===
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Add this line to your FDF FV section:
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INF RuleOverride=RESET_VECTOR USE = IA32 CloverEFI/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.inf
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(For X64 SEC/PEI change IA32 to X64 => 'USE = X64')
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In your FDF FFS file rules sections add:
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[Rule.Common.SEC.RESET_VECTOR]
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FILE RAW = $(NAMED_GUID) {
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RAW RAW |.raw
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}
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=== VTF0 Boot Flow ===
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1. Transition to IA32 flat mode
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2. Locate BFV (Boot Firmware Volume) by checking every 4kb boundary
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3. Locate SEC image
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4. X64 VTF0 transitions to X64 mode
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5. Call SEC image entry point
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== VTF0 SEC input parameters ==
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All inputs to SEC image are register based:
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EAX/RAX - Initial value of the EAX register (BIST: Built-in Self Test)
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DI - 'BP': boot-strap processor, or 'AP': application processor
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EBP/RBP - Pointer to the start of the Boot Firmware Volume
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=== HOW TO BUILD VTF0 ===
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Dependencies:
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* Python 2.5~2.7
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* Nasm 2.03 or newer
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To rebuild the VTF0 binaries:
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1. Change to VTF0 source dir: UefiCpuPkg/ResetVector/Vtf0
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2. nasm and python should be in executable path
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3. Run this command:
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python Build.py
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4. Binaries output will be in UefiCpuPkg/ResetVector/Vtf0/Bin
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