1 /* 2 * include/asm-xtensa/pci-bridge.h 3 * 4 * This file is subject to the terms and conditions of the GNU General 5 * Public License. See the file "COPYING" in the main directory of 6 * this archive for more details. 7 * 8 * Copyright (C) 2005 Tensilica Inc. 9 */ 10 11 #ifndef _XTENSA_PCI_BRIDGE_H 12 #define _XTENSA_PCI_BRIDGE_H 13 14 #ifdef __KERNEL__ 15 16 struct device_node; 17 struct pci_controller; 18 19 /* 20 * pciauto_bus_scan() enumerates the pci space. 21 */ 22 23 extern int pciauto_bus_scan(struct pci_controller *, int); 24 25 struct pci_space { 26 unsigned long start; 27 unsigned long end; 28 unsigned long base; 29 }; 30 31 /* 32 * Structure of a PCI controller (host bridge) 33 */ 34 35 struct pci_controller { 36 int index; /* used for pci_controller_num */ 37 struct pci_controller *next; 38 struct pci_bus *bus; 39 void *arch_data; 40 41 int first_busno; 42 int last_busno; 43 44 struct pci_ops *ops; 45 volatile unsigned int *cfg_addr; 46 volatile unsigned char *cfg_data; 47 48 /* Currently, we limit ourselves to 1 IO range and 3 mem 49 * ranges since the common pci_bus structure can't handle more 50 */ 51 struct resource io_resource; 52 struct resource mem_resources[3]; 53 int mem_resource_count; 54 55 /* Host bridge I/O and Memory space 56 * Used for BAR placement algorithms 57 */ 58 struct pci_space io_space; 59 struct pci_space mem_space; 60 61 /* Return the interrupt number fo a device. */ 62 int (*map_irq)(struct pci_dev*, u8, u8); 63 64 }; 65 66 static inline void pcibios_init_resource(struct resource *res, 67 unsigned long start, unsigned long end, int flags, char *name) 68 { 69 res->start = start; 70 res->end = end; 71 res->flags = flags; 72 res->name = name; 73 res->parent = NULL; 74 res->sibling = NULL; 75 res->child = NULL; 76 } 77 78 79 /* These are used for config access before all the PCI probing has been done. */ 80 int early_read_config_byte(struct pci_controller*, int, int, int, u8*); 81 int early_read_config_word(struct pci_controller*, int, int, int, u16*); 82 int early_read_config_dword(struct pci_controller*, int, int, int, u32*); 83 int early_write_config_byte(struct pci_controller*, int, int, int, u8); 84 int early_write_config_word(struct pci_controller*, int, int, int, u16); 85 int early_write_config_dword(struct pci_controller*, int, int, int, u32); 86 87 #endif /* __KERNEL__ */ 88 #endif /* _XTENSA_PCI_BRIDGE_H */ 89