mirror of https://github.com/acidanthera/audk.git
db38c7de64
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4494 Current reset vector uses 0xffffffe0 as AP waking vector, and expects GenFv generates code aligned on a 4k boundary which will jump to this location. However, some issues are listed below 1. GenFV doesn't generate code as the comment expects, because GenFv assumes no modifications are required to the VTF-0 'Volume Top File'. 2. Even if removing VFT0 signature and let GenFv to modify, Genfv is hard-code using another flash address 0xffffffd0. 3. In the same patch series, AP waking vector code is removed from GenFv, because no such usage anymore. The existing of first two issues also approve the usage is not available for a long time. Therefore, remove AP waking vector related code. Cc: Eric Dong <eric.dong@intel.com> Cc: Ray Ni <ray.ni@intel.com> Cc: Rahul Kumar <rahul1.kumar@intel.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Ray Ni <ray.ni@intel.com> Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com> |
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|---|---|---|
| .. | ||
| Ia16 | ||
| Ia32 | ||
| X64 | ||
| CommonMacros.inc | ||
| DebugDisabled.asm | ||
| Main.asm | ||
| PageTables.inc | ||
| Port80Debug.asm | ||
| PostCodes.inc | ||
| ReadMe.txt | ||
| ResetVector.uni | ||
| ResetVectorExtra.uni | ||
| SerialDebug.asm | ||
| Vtf0.inf | ||
| Vtf0.nasmb | ||
ReadMe.txt
=== HOW TO USE VTF0 === Add this line to your DSC [Components.IA32] or [Components.X64] section: UefiCpuPkg/ResetVector/Vtf0/ResetVector.inf Add this line to your FDF FV section: INF RuleOverride=RESET_VECTOR UefiCpuPkg/ResetVector/Vtf0/ResetVector.inf In your FDF FFS file rules sections add: [Rule.Common.SEC.RESET_VECTOR] FILE RAW = $(NAMED_GUID) { RAW BIN |.bin } === 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