pcibridge.h

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#ifndef _IPXE_PCIBRIDGE_H
#define _IPXE_PCIBRIDGE_H

/** @file
 *
 * PCI-to-PCI bridge
 *
 */

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );

#include <stdint.h>
#include <ipxe/list.h>
#include <ipxe/pci.h>

/** A PCI-to-PCI bridge */
struct pci_bridge {
        /** PCI device */
        struct pci_device *pci;
        /** Bridge numbers */
        union {
                /** Raw dword */
                uint32_t buses;
                struct {
                        /** Primary bus */
                        uint8_t primary;
                        /** Secondary bus */
                        uint8_t secondary;
                        /** Subordinate bus */
                        uint8_t subordinate;
                } __attribute__ (( packed ));
        };
        /** Memory base */
        uint32_t membase;
        /** Memory limit */
        uint32_t memlimit;
        /** Prefetchable memory base */
        uint64_t prefmembase;
        /** Prefetchable memory limit */
        uint64_t prefmemlimit;
        /** List of bridges */
        struct list_head list;
};

extern struct pci_bridge * pcibridge_find ( struct pci_device *pci );

#endif /* _IPXE_PCIBRIDGE_H */