1#ifndef ARCH_PIRQ_ROUTING_H 2#define ARCH_PIRQ_ROUTING_H 3 4#include <stdint.h> 5 6#define PIRQ_SIGNATURE (('$' << 0) + ('P' << 8) + ('I' << 16) + ('R' << 24)) 7#define PIRQ_VERSION 0x0100 8 9struct irq_info { 10 uint8_t bus, devfn; /* Bus, device and function */ 11 struct { 12 uint8_t link; /* IRQ line ID, chipset dependent, 0=not routed */ 13 uint16_t bitmap; /* Available IRQs */ 14 } __attribute__((packed)) irq[4]; 15 uint8_t slot; /* Slot number, 0=onboard */ 16 uint8_t rfu; 17} __attribute__((packed)); 18 19#if defined(CONFIG_IRQ_SLOT_COUNT) 20#define IRQ_SLOTS_COUNT CONFIG_IRQ_SLOT_COUNT 21#elif (__GNUC__ < 3) 22#define IRQ_SLOTS_COUNT 1 23#else 24#define IRQ_SLOTS_COUNT 25#endif 26 27struct irq_routing_table { 28 uint32_t signature; /* PIRQ_SIGNATURE should be here */ 29 uint16_t version; /* PIRQ_VERSION */ 30 uint16_t size; /* Table size in bytes */ 31 uint8_t rtr_bus, rtr_devfn; /* Where the interrupt router lies */ 32 uint16_t exclusive_irqs; /* IRQs devoted exclusively to PCI usage */ 33 uint16_t rtr_vendor, rtr_device; /* Vendor and device ID of interrupt router */ 34 uint32_t miniport_data; /* Miniport data */ 35 uint8_t rfu[11]; 36 uint8_t checksum; /* Modulo 256 checksum must give zero */ 37 struct irq_info slots[IRQ_SLOTS_COUNT]; 38} __attribute__((packed)); 39 40extern const struct irq_routing_table intel_irq_routing_table; 41 42#ifdef GETPIR 43#define copy_pirq_routing_table(start) (start) 44unsigned long write_pirq_routing_table(unsigned long start); 45#else 46#if CONFIG_HAVE_PIRQ_TABLE==1 47unsigned long copy_pirq_routing_table(unsigned long start); 48unsigned long write_pirq_routing_table(unsigned long start); 49#else 50#define copy_pirq_routing_table(start) (start) 51#define write_pirq_routing_table(start) (start) 52#endif 53#endif 54 55#endif /* ARCH_PIRQ_ROUTING_H */ 56