Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\apic\io_apic.c Create Date:2022-07-28 08:30:04
Last Modify:2020-03-16 21:24:45 Copyright©Brick
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Name:enable_IO_APIC

Proto:void __init enable_IO_APIC(void)

Type:void

Parameter:Nothing

1371  If skip_ioapic_setup Then nr_ioapics = 0
1374  If Not nr_legacy_irqs() || Not nr_ioapics Then Return
1377  for_each_ioapic_pin(apic, pin)
1379  entry = ioapic_read_entry(apic, pin)
1384  If 0: enabled, 1: disabled == 0 && 000: FIXED * 001: lowest prio * 111: ExtINT == dest_ExtINT Then
1385  apic = apic
1386  pin = pin
1387  Go to found_i8259
1390  found_i8259 :
1396  i8259_pin = Find the pin to which IRQ[irq] (ISA) is connected
1397  i8259_apic = find_isa_irq_apic(0, mp_ExtINT)
1399  If pin == -1 && i8259_pin >= 0 Then
1400  printk(warning conditions "ExtINT not setup in hardware but reported by MP table\n")
1401  pin = i8259_pin
1402  apic = i8259_apic
1405  If ( apic != i8259_apic || pin != i8259_pin ) && i8259_pin >= 0 && pin >= 0 Then
1408  printk(warning conditions "ExtINT in hardware and MP table differ\n")
1414  clear_IO_APIC()
Caller
NameDescribe
apic_bsp_setup