ostd::arch::kernel::apic

Enum ApicId

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pub enum ApicId {
    XApic(u8),
    X2Apic(u32),
}
Expand description

The core identifier. ApicId can be divided into Physical ApicId and Logical ApicId. The Physical ApicId is the value read from the LAPIC ID Register, while the Logical ApicId has different encoding modes in XApic and X2Apic.

Variants§

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XApic(u8)

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X2Apic(u32)

Implementations§

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impl ApicId

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pub fn x2apic_logical_id(&self) -> u32

Returns the logical x2apic ID.

In x2APIC mode, the 32-bit logical x2APIC ID, which can be read from LDR, is derived from the 32-bit local x2APIC ID: Logical x2APIC ID = [(x2APIC ID[19:4] << 16) | (1 << x2APIC ID[3:0])]

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pub fn x2apic_logical_cluster_id(&self) -> u32

Returns the logical x2apic cluster ID.

Logical cluster ID = x2APIC ID[19:4]

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pub fn x2apic_logical_field_id(&self) -> u32

Returns the logical x2apic field ID.

Specifically, the 16-bit logical ID sub-field is derived by the lowest 4 bits of the x2APIC ID, i.e., Logical field ID = x2APIC ID[3:0].

Trait Implementations§

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impl From<u32> for ApicId

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fn from(value: u32) -> Self

Converts to this type from the input type.

Auto Trait Implementations§

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impl Freeze for ApicId

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impl RefUnwindSafe for ApicId

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impl Send for ApicId

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impl Sync for ApicId

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impl Unpin for ApicId

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impl UnwindSafe for ApicId

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