1 #ifdef __KERNEL__
2 #ifndef _ASM_PCI_BRIDGE_H
3 #define _ASM_PCI_BRIDGE_H
4
5 void pmac_find_bridges(void);
6
7 /*
8 * pci_io_base returns the memory address at which you can access
9 * the I/O space for PCI bus number `bus' (or NULL on error).
10 *
11 * NOTE: This doesn't handle the new Uni-N chip which requires
12 * per-device io_base.
13 */
14 void *pci_io_base(unsigned int bus);
15
16 /* This version handles the new Uni-N host bridge, the iobase is now
17 * a per-device thing. I also added the memory base so PReP can
18 * be fixed to return 0xc0000000 (I didn't actually implement it)
19 *
20 * pci_dev_io_base() returns either a virtual (ioremap'ed) address or
21 * a physical address. In-kernel clients will use logical while the
22 * sys_pciconfig_iobase syscall returns a physical one to userland.
23 */
24 void *pci_dev_io_base(unsigned char bus, unsigned char devfn, int physical);
25 void *pci_dev_mem_base(unsigned char bus, unsigned char devfn);
26
27 /* Returns the root-bridge number (Uni-N number) of a device */
28 int pci_dev_root_bridge(unsigned char bus, unsigned char devfn);
29
30 /*
31 * pci_device_loc returns the bus number and device/function number
32 * for a device on a PCI bus, given its device_node struct.
33 * It returns 0 if OK, -1 on error.
34 */
35 int pci_device_loc(struct device_node *dev, unsigned char *bus_ptr,
36 unsigned char *devfn_ptr);
37
38 struct bridge_data {
39 volatile unsigned int *cfg_addr;
40 volatile unsigned char *cfg_data;
41 void *io_base; /* virtual */
42 unsigned long io_base_phys;
43 int bus_number;
44 int max_bus;
45 struct bridge_data *next;
46 struct device_node *node;
47 };
48
49 #endif
50 #endif /* __KERNEL__ */
51
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