2 #ifndef _ASM_PCI_BRIDGE_H
3 #define _ASM_PCI_BRIDGE_H
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
15 struct pci_controller;
17 /* Get the PCI host controller for an OF device */
18 extern struct pci_controller*
19 pci_find_hose_for_OF_device(struct device_node* node);
22 * Structure of a PCI controller (host bridge)
24 struct pci_controller {
25 char what[8]; /* Eye catcher */
29 struct list_head list_node;
34 void __iomem *io_base_virt;
35 unsigned long io_base_phys;
37 /* Some machines have a non 1:1 mapping of
38 * the PCI memory space in the CPU bus space
40 unsigned long pci_mem_offset;
41 unsigned long pci_io_size;
44 volatile unsigned int __iomem *cfg_addr;
45 volatile unsigned char __iomem *cfg_data;
47 /* Currently, we limit ourselves to 1 IO range and 3 mem
48 * ranges since the common pci_bus structure can't handle more
50 struct resource io_resource;
51 struct resource mem_resources[3];
52 int mem_resource_count;
56 unsigned long dma_window_base_cur;
57 unsigned long dma_window_size;
61 * pci_device_loc returns the bus number and device/function number
62 * for a device on a PCI bus, given its device_node struct.
63 * It returns 0 if OK, -1 on error.
65 extern int pci_device_loc(struct device_node *dev, unsigned char *bus_ptr,
66 unsigned char *devfn_ptr);
68 struct device_node *fetch_dev_dn(struct pci_dev *dev);
70 /* Get a device_node from a pci_dev. This code must be fast except in the case
71 * where the sysdata is incorrect and needs to be fixed up (hopefully just once)
73 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
75 struct device_node *dn = (struct device_node *)(dev->sysdata);
76 if (dn->devfn == dev->devfn && dn->busno == (dev->bus->number&0xff))
77 return dn; /* fast path. sysdata is good */
79 return fetch_dev_dn(dev);
82 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
83 struct device_node *dev);
85 extern int pcibios_remove_root_bus(struct pci_controller *phb);
87 extern void phbs_remap_io(void);
89 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
91 struct device_node *busdn = bus->sysdata;
93 BUG_ON(busdn == NULL);
99 #endif /* __KERNEL__ */