51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
|
#ifndef ARCH_PIRQ_ROUTING_H
|
||
|
|
#define ARCH_PIRQ_ROUTING_H
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
#define PIRQ_SIGNATURE (('$' << 0) + ('P' << 8) + ('I' << 16) + ('R' << 24))
|
||
|
|
#define PIRQ_VERSION 0x0100
|
||
|
|
|
||
|
|
struct irq_info {
|
||
|
|
uint8_t bus, devfn; /* Bus, device and function */
|
||
|
|
struct {
|
||
|
|
uint8_t link; /* IRQ line ID, chipset dependent, 0=not routed */
|
||
|
|
uint16_t bitmap; /* Available IRQs */
|
||
|
|
} __attribute__((packed)) irq[4];
|
||
|
|
uint8_t slot; /* Slot number, 0=onboard */
|
||
|
|
uint8_t rfu;
|
||
|
|
} __attribute__((packed));
|
||
|
|
|
||
|
|
#if defined(IRQ_SLOT_COUNT)
|
||
|
|
#define IRQ_SLOTS_COUNT IRQ_SLOT_COUNT
|
||
|
|
#elif (__GNUC__ < 3)
|
||
|
|
#define IRQ_SLOTS_COUNT 1
|
||
|
|
#else
|
||
|
|
#define IRQ_SLOTS_COUNT
|
||
|
|
#endif
|
||
|
|
|
||
|
|
struct irq_routing_table {
|
||
|
|
uint32_t signature; /* PIRQ_SIGNATURE should be here */
|
||
|
|
uint16_t version; /* PIRQ_VERSION */
|
||
|
|
uint16_t size; /* Table size in bytes */
|
||
|
|
uint8_t rtr_bus, rtr_devfn; /* Where the interrupt router lies */
|
||
|
|
uint16_t exclusive_irqs; /* IRQs devoted exclusively to PCI usage */
|
||
|
|
uint16_t rtr_vendor, rtr_device; /* Vendor and device ID of interrupt router */
|
||
|
|
uint32_t miniport_data; /* Crap */
|
||
|
|
uint8_t rfu[11];
|
||
|
|
uint8_t checksum; /* Modulo 256 checksum must give zero */
|
||
|
|
struct irq_info slots[IRQ_SLOTS_COUNT];
|
||
|
|
} __attribute__((packed));
|
||
|
|
|
||
|
|
extern const struct irq_routing_table intel_irq_routing_table;
|
||
|
|
|
||
|
|
#if HAVE_PIRQ_TABLE==1
|
||
|
|
unsigned long copy_pirq_routing_table(unsigned long start);
|
||
|
|
unsigned long write_pirq_routing_table(unsigned long start);
|
||
|
|
#else
|
||
|
|
#define copy_pirq_routing_table(start) (start)
|
||
|
|
#define write_pirq_routing_table(start) (start)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* ARCH_PIRQ_ROUTING_H */
|