source code af the BSP and AP initialization

[Iurie]

hi,
i have looked in the internet for the source code of the BSP and the AP
initialization of the intel CPU but i am not able to find it.
so can somebody help me?
can somebody give me a link to the web access of the source code or at
least the location inside the kernel repository?

i thank you in advance for the help

PS. if it is not the right mailing list to post this qestion give me then
the name of the right mailing list