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/export.h> 11 #include <asm/io.h> 12 13 #ifdef CONFIG_PCI_DRIVERS_LEGACY 14 15 void __iomem *__pci_ioport_map(struct pci_dev *dev, 16 unsigned long port, unsigned int nr) 17 { 18 struct pci_controller *ctrl = dev->bus->sysdata; 19 unsigned long base = ctrl->io_map_base; 20 21 /* This will eventually become a BUG_ON but for now be gentle */ 22 if (unlikely(!ctrl->io_map_base)) { 23 struct pci_bus *bus = dev->bus; 24 char name[8]; 25 26 while (bus->parent) 27 bus = bus->parent; 28 29 ctrl->io_map_base = base = mips_io_port_base; 30 31 sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number); 32 printk(KERN_WARNING "io_map_base of root PCI bus %s unset. " 33 "Trying to continue but you better\nfix this issue or " 34 "report it to linux-mips@linux-mips.org or your " 35 "vendor.\n", name); 36 #ifdef CONFIG_PCI_DOMAINS 37 panic("To avoid data corruption io_map_base MUST be set with " 38 "multiple PCI domains."); 39 #endif 40 } 41 42 return (void __iomem *) (ctrl->io_map_base + port); 43 } 44 45 #endif /* CONFIG_PCI_DRIVERS_LEGACY */ 46 47 void pci_iounmap(struct pci_dev *dev, void __iomem * addr) 48 { 49 iounmap(addr); 50 } 51 52 EXPORT_SYMBOL(pci_iounmap); 53