forked from Minki/linux
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
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/*
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* include/asm-xtensa/pci-bridge.h
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of
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* this archive for more details.
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*
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* Copyright (C) 2005 Tensilica Inc.
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*/
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#ifndef _XTENSA_PCI_BRIDGE_H
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#define _XTENSA_PCI_BRIDGE_H
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#ifdef __KERNEL__
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struct device_node;
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struct pci_controller;
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/*
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* pciauto_bus_scan() enumerates the pci space.
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*/
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extern int pciauto_bus_scan(struct pci_controller *, int);
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struct pci_space {
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unsigned long start;
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unsigned long end;
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unsigned long base;
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};
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/*
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* Structure of a PCI controller (host bridge)
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*/
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struct pci_controller {
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int index; /* used for pci_controller_num */
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struct pci_controller *next;
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struct pci_bus *bus;
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void *arch_data;
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int first_busno;
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int last_busno;
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struct pci_ops *ops;
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volatile unsigned int *cfg_addr;
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volatile unsigned char *cfg_data;
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/* Currently, we limit ourselves to 1 IO range and 3 mem
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* ranges since the common pci_bus structure can't handle more
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*/
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struct resource io_resource;
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struct resource mem_resources[3];
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int mem_resource_count;
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/* Host bridge I/O and Memory space
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* Used for BAR placement algorithms
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*/
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struct pci_space io_space;
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struct pci_space mem_space;
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/* Return the interrupt number fo a device. */
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int (*map_irq)(struct pci_dev*, u8, u8);
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};
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static inline void pcibios_init_resource(struct resource *res,
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unsigned long start, unsigned long end, int flags, char *name)
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{
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res->start = start;
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res->end = end;
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res->flags = flags;
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res->name = name;
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res->parent = NULL;
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res->sibling = NULL;
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res->child = NULL;
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}
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/* These are used for config access before all the PCI probing has been done. */
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int early_read_config_byte(struct pci_controller*, int, int, int, u8*);
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int early_read_config_word(struct pci_controller*, int, int, int, u16*);
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int early_read_config_dword(struct pci_controller*, int, int, int, u32*);
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int early_write_config_byte(struct pci_controller*, int, int, int, u8);
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int early_write_config_word(struct pci_controller*, int, int, int, u16);
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int early_write_config_dword(struct pci_controller*, int, int, int, u32);
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#endif /* __KERNEL__ */
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#endif /* _XTENSA_PCI_BRIDGE_H */
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