Function report |
Source Code:arch\x86\kernel\apic\io_apic.c |
Create Date:2022-07-28 08:29:24 |
Last Modify:2020-03-16 21:24:45 | Copyright©Brick |
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Name:The common case is 1:1 IRQ<->pin mappings. Sometimes there are* shared ISA-space IRQs, so we have to support them. We are super* fast in the common case, and fast for shared ISA-space IRQs.
Proto:static int __add_pin_to_irq_node(struct mp_chip_data *data, int node, int apic, int pin)
Type:int
Parameter:
Type | Parameter | Name |
---|---|---|
struct mp_chip_data * | data | |
int | node | |
int | apic | |
int | pin |
380 | for_each_irq_pin(entry, irq_2_pin) |
385 | If Not entry Then |
394 | Return 0 |
Name | Describe |
---|---|
add_pin_to_irq_node | |
alloc_isa_irq_from_domain | Need special handling for ISA IRQs because there may be multiple IOAPIC pins* sharing the same ISA IRQ number and irqdomain only supports 1:1 mapping* between IOAPIC pin and IRQ number. A typical IOAPIC has 24 pins, pin 0-15 are |
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