On 2011-04-26 20:00, Blue Swirl wrote: > On Tue, Apr 26, 2011 at 11:50 AM, Jan Kiszka <jan.kis...@siemens.com> wrote: >> Instead of having an extra reset function at machine level and special >> code for processing INIT, move the initialization of halted into the >> cpu reset handler. > > Nack. A CPU is designated as a BSP at board level. CPUs do not need to > know about this at all.
That's why we have cpu_is_bsp() in pc.c. Obviously, every CPU (which includes the APIC) must know if it is supposed to be BP or AP. It would be unable to enter the right state after reset otherwise (e.g. Intel SDM 9.1). cpu_is_bsp() is basically reporting the result of the MP init protocol in condensed from. Jan
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