pci-bridge.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:3k
- #ifdef __KERNEL__
- #ifndef _ASM_PCI_BRIDGE_H
- #define _ASM_PCI_BRIDGE_H
- /*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- struct device_node;
- struct pci_controller;
- /*
- * pci_io_base returns the memory address at which you can access
- * the I/O space for PCI bus number `bus' (or NULL on error).
- */
- extern void *pci_bus_io_base(unsigned int bus);
- extern unsigned long pci_bus_io_base_phys(unsigned int bus);
- extern unsigned long pci_bus_mem_base_phys(unsigned int bus);
- /* Get the PCI host controller for a bus */
- extern struct pci_controller* pci_bus_to_hose(int bus);
- /* Get the PCI host controller for an OF device */
- extern struct pci_controller*
- pci_find_hose_for_OF_device(struct device_node* node);
- enum phb_types {
- phb_type_unknown = 0x0,
- phb_type_hypervisor = 0x1,
- phb_type_python = 0x10,
- phb_type_speedwagon = 0x11
- };
- /*
- * Structure of a PCI controller (host bridge)
- */
- struct pci_controller {
- char what[8]; /* Eye catcher */
- enum phb_types type; /* Type of hardware */
- struct pci_controller *next;
- struct pci_bus *bus;
- void *arch_data;
- int first_busno;
- int last_busno;
- void *io_base_virt;
- unsigned long io_base_phys;
- /* Some machines (PReP) have a non 1:1 mapping of
- * the PCI memory space in the CPU bus space
- */
- unsigned long pci_mem_offset;
- unsigned long pci_io_offset;
- struct pci_ops *ops;
- volatile unsigned long *cfg_addr;
- volatile unsigned char *cfg_data;
- volatile unsigned long *phb_regs;
- volatile unsigned long *chip_regs;
- /* Currently, we limit ourselves to 1 IO range and 3 mem
- * ranges since the common pci_bus structure can't handle more
- */
- struct resource io_resource;
- struct resource mem_resources[3];
- int mem_resource_count;
- int global_number;
- int local_number;
- int system_bus_number;
- unsigned long buid;
- unsigned long dma_window_base_cur;
- unsigned long dma_window_size;
- };
- /* This version handles the new Uni-N host bridge, the iobase is now
- * a per-device thing. I also added the memory base so PReP can
- * be fixed to return 0xc0000000 (I didn't actually implement it)
- *
- * pci_dev_io_base() returns either a virtual (ioremap'ed) address or
- * a physical address. In-kernel clients will use logical while the
- * sys_pciconfig_iobase syscall returns a physical one to userland.
- */
- void *pci_dev_io_base(unsigned char bus, unsigned char devfn, int physical);
- void *pci_dev_mem_base(unsigned char bus, unsigned char devfn);
- /* Returns the root-bridge number (Uni-N number) of a device */
- int pci_dev_root_bridge(unsigned char bus, unsigned char devfn);
- /*
- * pci_device_loc returns the bus number and device/function number
- * for a device on a PCI bus, given its device_node struct.
- * It returns 0 if OK, -1 on error.
- */
- int pci_device_loc(struct device_node *dev, unsigned char *bus_ptr,
- unsigned char *devfn_ptr);
- struct bridge_data {
- volatile unsigned int *cfg_addr;
- volatile unsigned char *cfg_data;
- void *io_base; /* virtual */
- unsigned long io_base_phys;
- int bus_number;
- int max_bus;
- struct bridge_data *next;
- struct device_node *node;
- };
- #endif
- #endif /* __KERNEL__ */