• Hanjun Guo's avatar
    ACPI / processor: Convert apic_id to phys_id to make it arch agnostic · af8f3f51
    Hanjun Guo authored
    apic_id in MADT table is the CPU hardware id which identify
    it self in the system for x86 and ia64, OSPM will use it for
    SMP init to map APIC ID to logical cpu number in the early
    boot, when the DSDT/SSDT (ACPI namespace) is scanned later, the
    ACPI processor driver is probed and the driver will use acpi_id
    in DSDT to get the apic_id, then map to the logical cpu number
    which is needed by the processor driver.
    Before ACPI 5.0, only x86 and ia64 were supported in ACPI spec,
    so apic_id is used both in arch code and ACPI core which is
    pretty fine. Since ACPI 5.0, ARM is supported by ACPI and
    APIC is not available on ARM, this will confuse people when
    apic_id is both used by x86 and ARM in one function.
    So convert apic_id to phys_id (which is the original meaning)
    in ACPI processor dirver to make it arch agnostic, but leave the
    arch dependent code unchanged, no functional change.
    Signed-off-by: default avatarHanjun Guo <hanjun.guo@linaro.org>
    Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
processor.h 9.18 KB