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Linux/arch/mips/lib/iomap-pci.c

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  1 /*
  2  * Implement the default iomap interfaces
  3  *
  4  * (C) Copyright 2004 Linus Torvalds
  5  * (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org>
  6  * (C) Copyright 2007 MIPS Technologies, Inc.
  7  *     written by Ralf Baechle <ralf@linux-mips.org>
  8  */
  9 #include <linux/pci.h>
 10 #include <linux/module.h>
 11 #include <asm/io.h>
 12 
 13 void __iomem *__pci_ioport_map(struct pci_dev *dev,
 14                                unsigned long port, unsigned int nr)
 15 {
 16         struct pci_controller *ctrl = dev->bus->sysdata;
 17         unsigned long base = ctrl->io_map_base;
 18 
 19         /* This will eventually become a BUG_ON but for now be gentle */
 20         if (unlikely(!ctrl->io_map_base)) {
 21                 struct pci_bus *bus = dev->bus;
 22                 char name[8];
 23 
 24                 while (bus->parent)
 25                         bus = bus->parent;
 26 
 27                 ctrl->io_map_base = base = mips_io_port_base;
 28 
 29                 sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number);
 30                 printk(KERN_WARNING "io_map_base of root PCI bus %s unset.  "
 31                        "Trying to continue but you better\nfix this issue or "
 32                        "report it to linux-mips@linux-mips.org or your "
 33                        "vendor.\n", name);
 34 #ifdef CONFIG_PCI_DOMAINS
 35                 panic("To avoid data corruption io_map_base MUST be set with "
 36                       "multiple PCI domains.");
 37 #endif
 38         }
 39 
 40         return (void __iomem *) (ctrl->io_map_base + port);
 41 }
 42 
 43 void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
 44 {
 45         iounmap(addr);
 46 }
 47 
 48 EXPORT_SYMBOL(pci_iounmap);
 49 

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