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#ifndef PCI_HOST_GENERIC_H
#define PCI_HOST_GENERIC_H
/*
* PCI host bridge supporting structures and constants
*
* Copyright (C) 2016, Red Hat Inc, Alexander Gordeev <agordeev@redhat.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2.
*/
#include "libcflat.h"
struct pci_addr_space {
phys_addr_t pci_start;
phys_addr_t start;
phys_addr_t size;
phys_addr_t allocated;
int type;
};
struct pci_host_bridge {
phys_addr_t start;
phys_addr_t size;
int bus;
int bus_max;
int nr_addr_spaces;
struct pci_addr_space addr_space[];
};
/*
* The following constants are derived from Linux, see this source:
*
* drivers/pci/host/pci-host-generic.c
* struct gen_pci_cfg_bus_ops::bus_shift
* int gen_pci_parse_map_cfg_windows(struct gen_pci *pci)
*
* Documentation/devicetree/bindings/pci/host-generic-pci.txt describes
* ECAM Configuration Space is be memory-mapped by concatenating the various
* components to form an offset:
*
* cfg_offset(bus, device, function, register) =
* bus << 20 | device << 15 | function << 12 | register
*/
#define PCI_ECAM_BUS_SHIFT 20
#define PCI_ECAM_DEVFN_SHIFT 12
#endif
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