util/getpir/pirq_routing.h

   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
   9 struct 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
  27 struct 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
  40 extern const struct irq_routing_table intel_irq_routing_table;
  41
  42 #ifdef GETPIR
  43 #define copy_pirq_routing_table(start) (start)
  44 unsigned long write_pirq_routing_table(unsigned long start);
  45 #else
  46 #if CONFIG_HAVE_PIRQ_TABLE==1
  47 unsigned long copy_pirq_routing_table(unsigned long start);
  48 unsigned 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 */