mirror of https://gitee.com/openkylin/linux.git
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
#ifdef __KERNEL__
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#ifndef _ASM_PCI_BRIDGE_H
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#define _ASM_PCI_BRIDGE_H
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#include <linux/pci.h>
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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/*
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* Structure of a PCI controller (host bridge)
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*/
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struct pci_controller {
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struct pci_bus *bus;
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char is_dynamic;
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void *arch_data;
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struct list_head list_node;
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int first_busno;
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int last_busno;
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void __iomem *io_base_virt;
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unsigned long io_base_phys;
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/* Some machines have a non 1:1 mapping of
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* the PCI memory space in the CPU bus space
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*/
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unsigned long pci_mem_offset;
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unsigned long pci_io_size;
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struct pci_ops *ops;
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volatile unsigned int __iomem *cfg_addr;
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volatile unsigned char __iomem *cfg_data;
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/* Currently, we limit ourselves to 1 IO range and 3 mem
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* ranges since the common pci_bus structure can't handle more
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*/
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struct resource io_resource;
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struct resource mem_resources[3];
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int global_number;
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int local_number;
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unsigned long buid;
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unsigned long dma_window_base_cur;
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unsigned long dma_window_size;
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};
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struct device_node *fetch_dev_dn(struct pci_dev *dev);
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/* Get a device_node from a pci_dev. This code must be fast except in the case
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* where the sysdata is incorrect and needs to be fixed up (hopefully just once)
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*/
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static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
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{
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struct device_node *dn = dev->sysdata;
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if (dn->devfn == dev->devfn && dn->busno == dev->bus->number)
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return dn; /* fast path. sysdata is good */
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else
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return fetch_dev_dn(dev);
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}
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static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
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{
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if (bus->self)
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return pci_device_to_OF_node(bus->self);
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else
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return bus->sysdata; /* Must be root bus (PHB) */
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}
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extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
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struct device_node *dev);
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extern int pcibios_remove_root_bus(struct pci_controller *phb);
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extern void phbs_remap_io(void);
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static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
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{
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struct device_node *busdn = bus->sysdata;
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BUG_ON(busdn == NULL);
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return busdn->phb;
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}
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#endif
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#endif /* __KERNEL__ */
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