mirror of https://gitee.com/openkylin/linux.git
118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#ifndef _ASM_TILE_PCI_BRIDGE_H
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#define _ASM_TILE_PCI_BRIDGE_H
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#include <linux/ioport.h>
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#include <linux/pci.h>
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struct device_node;
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struct pci_controller;
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/*
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* pci_io_base returns the memory address at which you can access
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* the I/O space for PCI bus number `bus' (or NULL on error).
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*/
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extern void __iomem *pci_bus_io_base(unsigned int bus);
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extern unsigned long pci_bus_io_base_phys(unsigned int bus);
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extern unsigned long pci_bus_mem_base_phys(unsigned int bus);
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/* Allocate a new PCI host bridge structure */
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extern struct pci_controller *pcibios_alloc_controller(void);
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/* Helper function for setting up resources */
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extern void pci_init_resource(struct resource *res, unsigned long start,
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unsigned long end, int flags, char *name);
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/* Get the PCI host controller for a bus */
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extern struct pci_controller *pci_bus_to_hose(int bus);
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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; /* PCI domain number */
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struct pci_bus *root_bus;
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int first_busno;
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int last_busno;
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int hv_cfg_fd[2]; /* config{0,1} fds for this PCIe controller */
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int hv_mem_fd; /* fd to Hypervisor for MMIO operations */
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struct pci_ops *ops;
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int irq_base; /* Base IRQ from the Hypervisor */
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int plx_gen1; /* flag for PLX Gen 1 configuration */
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/* Address ranges that are routed to this controller/bridge. */
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struct resource mem_resources[3];
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};
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static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
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{
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return bus->sysdata;
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}
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extern void setup_indirect_pci_nomap(struct pci_controller *hose,
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void __iomem *cfg_addr, void __iomem *cfg_data);
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extern void setup_indirect_pci(struct pci_controller *hose,
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u32 cfg_addr, u32 cfg_data);
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extern void setup_grackle(struct pci_controller *hose);
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extern unsigned char common_swizzle(struct pci_dev *, unsigned char *);
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/*
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* The following code swizzles for exactly one bridge. The routine
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* common_swizzle below handles multiple bridges. But there are a
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* some boards that don't follow the PCI spec's suggestion so we
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* break this piece out separately.
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*/
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static inline unsigned char bridge_swizzle(unsigned char pin,
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unsigned char idsel)
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{
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return (((pin-1) + idsel) % 4) + 1;
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}
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/*
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* The following macro is used to lookup irqs in a standard table
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* format for those PPC systems that do not already have PCI
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* interrupts properly routed.
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*/
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/* FIXME - double check this */
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#define PCI_IRQ_TABLE_LOOKUP ({ \
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long _ctl_ = -1; \
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if (idsel >= min_idsel && idsel <= max_idsel && pin <= irqs_per_slot) \
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_ctl_ = pci_irq_table[idsel - min_idsel][pin-1]; \
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_ctl_; \
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})
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/*
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* Scan the buses below a given PCI host bridge and assign suitable
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* resources to all devices found.
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*/
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extern int pciauto_bus_scan(struct pci_controller *, int);
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#ifdef CONFIG_PCI
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extern unsigned long pci_address_to_pio(phys_addr_t address);
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#else
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static inline unsigned long pci_address_to_pio(phys_addr_t address)
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{
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return (unsigned long)-1;
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}
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#endif
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#endif /* _ASM_TILE_PCI_BRIDGE_H */
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