christoph/interrupt-handling-using-the-x86-apic
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Final pre-release

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Christoph Urlacher
2023-03-02 17:29:30 +01:00
parent 01b1be0629
commit 3f02dfd309
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diagrams/apic_smp_enable_seq.puml Normal file
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@startuml
'https://plantuml.com/sequence-diagram
title Apic::startupSmp() for a single AP
footer The Application Processor lifetime symbolizes the AP's expected online state for the xApic architecture.
participant Apic
participant GDT as "AP GDT"
participant Stack as "AP Stack"
participant 0x8000 as "AP Boot Routine"
participant LocalApic
participant smp_entry as "Application Processor"
Apic -> GDT ++: Prepare AP GDT
Apic -> Stack ++: Allocate AP stack
group Prepare AP Boot Routine
Apic -[hidden]> smp_entry
Apic -> 0x8000 ++: Allocate physical memory at 0x8000
Apic -> Apic: Initialize smp_boot variables
Apic -> 0x8000: Copy smp_boot to 0x8000
end
Apic -> Apic: Prepare warm reset
group Universal Startup Algorithm
Apic -> LocalApic: Send INIT IPI
LocalApic -> smp_entry: INIT
...10 ms...
Apic -> LocalApic: Send SIPI
LocalApic -> smp_entry ++: STARTUP
...200 us...
Apic -> LocalApic: Send SIPI
LocalApic -> smp_entry: STARTUP
...200 us...
end
Apic <- smp_entry: Initialize AP's local APIC
Apic <- smp_entry: Initialize AP's APIC timer
Apic <- smp_entry: Initialize AP's APIC error handler
Apic <- smp_entry: Signal boot completion
Apic -> 0x8000 !!: Free physical memory at 0x8000
@enduml