| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifdef __KERNEL__ |
| 2 | #ifndef _ASM_PCI_BRIDGE_H |
| 3 | #define _ASM_PCI_BRIDGE_H |
| 4 | |
| 5 | #include <linux/pci.h> |
| 6 | |
| 7 | /* |
| 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. |
| 12 | */ |
| 13 | |
| 14 | /* |
| 15 | * Structure of a PCI controller (host bridge) |
| 16 | */ |
| 17 | struct pci_controller { |
| 18 | struct pci_bus *bus; |
| 19 | char is_dynamic; |
| 20 | void *arch_data; |
| 21 | struct list_head list_node; |
| 22 | |
| 23 | int first_busno; |
| 24 | int last_busno; |
| 25 | |
| 26 | void __iomem *io_base_virt; |
| 27 | unsigned long io_base_phys; |
| 28 | |
| 29 | /* Some machines have a non 1:1 mapping of |
| 30 | * the PCI memory space in the CPU bus space |
| 31 | */ |
| 32 | unsigned long pci_mem_offset; |
| 33 | unsigned long pci_io_size; |
| 34 | |
| 35 | struct pci_ops *ops; |
| 36 | volatile unsigned int __iomem *cfg_addr; |
| 37 | volatile unsigned char __iomem *cfg_data; |
| 38 | |
| 39 | /* Currently, we limit ourselves to 1 IO range and 3 mem |
| 40 | * ranges since the common pci_bus structure can't handle more |
| 41 | */ |
| 42 | struct resource io_resource; |
| 43 | struct resource mem_resources[3]; |
| 44 | int global_number; |
| 45 | int local_number; |
| 46 | unsigned long buid; |
| 47 | unsigned long dma_window_base_cur; |
| 48 | unsigned long dma_window_size; |
| 49 | }; |
| 50 | |
| 51 | struct device_node *fetch_dev_dn(struct pci_dev *dev); |
| 52 | |
| 53 | /* Get a device_node from a pci_dev. This code must be fast except in the case |
| 54 | * where the sysdata is incorrect and needs to be fixed up (hopefully just once) |
| 55 | */ |
| 56 | static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev) |
| 57 | { |
| 58 | struct device_node *dn = dev->sysdata; |
| 59 | |
| 60 | if (dn->devfn == dev->devfn && dn->busno == dev->bus->number) |
| 61 | return dn; /* fast path. sysdata is good */ |
| 62 | else |
| 63 | return fetch_dev_dn(dev); |
| 64 | } |
| 65 | |
| 66 | static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus) |
| 67 | { |
| 68 | if (bus->self) |
| 69 | return pci_device_to_OF_node(bus->self); |
| 70 | else |
| 71 | return bus->sysdata; /* Must be root bus (PHB) */ |
| 72 | } |
| 73 | |
| 74 | extern void pci_process_bridge_OF_ranges(struct pci_controller *hose, |
| 75 | struct device_node *dev); |
| 76 | |
| 77 | extern int pcibios_remove_root_bus(struct pci_controller *phb); |
| 78 | |
| 79 | extern void phbs_remap_io(void); |
| 80 | |
| 81 | static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus) |
| 82 | { |
| 83 | struct device_node *busdn = bus->sysdata; |
| 84 | |
| 85 | BUG_ON(busdn == NULL); |
| 86 | return busdn->phb; |
| 87 | } |
| 88 | |
| 89 | #endif |
| 90 | #endif /* __KERNEL__ */ |