Linux核心数据结构--pci_bus

表示系统中的一个PCI总线。

struct pci_bus {

  struct pci_bus  *parent;     /* parent bus this bridge is on */
  struct pci_bus  *children;   /* chain of P2P bridges on this bus */
  struct pci_bus  *next;       /* chain of all PCI buses */



  struct pci_dev  *self;       /* bridge device as seen by parent */

  struct pci_dev  *devices;    /* devices behind this bridge */


  void    *sysdata;           /* hook for sys-specific extension */


  unsigned char  number;      /* bus number */
  unsigned char  primary;      /* number of primary bridge */

unsigned char  secondary;    /* number of secondary bridge */
  unsigned char  subordinate;  /* max number of subordinate buses */

};