init_bsp_APIC

Name:An initial setup of the virtual wire mode.

Proto:void __init init_bsp_APIC(void)

Type:void

Parameter:Nothing

1413

If Have we found an MP table || Not boot_cpu_has(Onboard APIC ) Then Return

1419

lear_local_APIC - shutdown the local APIC* This is called, when a CPU is disabled and before rebooting, so the state of* the local APIC has no dangling leftovers. Also used to cleanout any BIOS* leftovers during boot.

1424

value = apic_read(APIC_SPIV)

1425

value &= ~APIC_VECTOR_MASK

1426

value |= APIC_SPIV_APIC_ENABLED

1430

If x86_vendor == X86_VENDOR_INTEL && x86 == 15 Then value &= ~APIC_SPIV_FOCUS_DISABLED

1433

Else value |= APIC_SPIV_FOCUS_DISABLED

1436

value |= Special IRQ vectors used by the SMP architecture, 0xf0-0xff* some of the following vectors are 'rare', they are merged* into a single vector (CALL_FUNCTION_VECTOR) to save vector space.* TLB, reschedule and local APIC vectors are performance-critical.

1437

apic_write(APIC_SPIV, value)

1442

apic_write(APIC_LVT0, APIC_DM_EXTINT)

1443

value = APIC_DM_NMI

1444

If Not Check, if the APIC is integrated or a separate chip Then value |= APIC_LVT_LEVEL_TRIGGER

1446

If This variable controls which CPUs receive external NMIs. By default,* external NMIs are delivered only to the BSP. == APIC_EXTNMI_NONE Then value |= APIC_LVT_MASKED

1448

apic_write(APIC_LVT1, value)

**Caller**
Name	Describe
init_ISA_irqs

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