What is the AP Reset Vector / Recovery Startup AP Data
Posted: Sun Jun 25, 2023 5:32 am
Hi!
I am modifying a PEI firmware volume that contains "Startup AP data" at the end. Which is just a jump instruction to F000:FFD0 in a padding file.
See the relevant code in edk2: https://github.com/tianocore/edk2/blob/ ... Lib.c#L127
Do any of you know more about this and could point me to a specification I could read more about?
I tried to search for this address in the UEFI PI and Intel MP Specifications as well as the Intel 64 and IA-32 Architectures Software Developer’s Manual but was not successful.
And the array is there since the very first commit to edk2's buildtools back in 2007, so I was not able to find any info in the log.
PS: It's my first time here, so please tell me if I disregarded any best-practices or similar!
I am modifying a PEI firmware volume that contains "Startup AP data" at the end. Which is just a jump instruction to F000:FFD0 in a padding file.
See the relevant code in edk2: https://github.com/tianocore/edk2/blob/ ... Lib.c#L127
Do any of you know more about this and could point me to a specification I could read more about?
I tried to search for this address in the UEFI PI and Intel MP Specifications as well as the Intel 64 and IA-32 Architectures Software Developer’s Manual but was not successful.
And the array is there since the very first commit to edk2's buildtools back in 2007, so I was not able to find any info in the log.
PS: It's my first time here, so please tell me if I disregarded any best-practices or similar!