2 * Implement the default iomap interfaces
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>
10 #include <linux/module.h>
13 static void __iomem *ioport_map_pci(struct pci_dev *dev,
14 unsigned long port, unsigned int nr)
16 struct pci_controller *ctrl = dev->bus->sysdata;
17 unsigned long base = ctrl->io_map_base;
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;
27 ctrl->io_map_base = base = mips_io_port_base;
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 "
34 #ifdef CONFIG_PCI_DOMAINS
35 panic("To avoid data corruption io_map_base MUST be set with "
36 "multiple PCI domains.");
40 return (void __iomem *) (ctrl->io_map_base + port);
44 * Create a virtual mapping cookie for a PCI BAR (memory or IO)
46 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
48 resource_size_t start = pci_resource_start(dev, bar);
49 resource_size_t len = pci_resource_len(dev, bar);
50 unsigned long flags = pci_resource_flags(dev, bar);
54 if (maxlen && len > maxlen)
56 if (flags & IORESOURCE_IO)
57 return ioport_map_pci(dev, start, len);
58 if (flags & IORESOURCE_MEM) {
59 if (flags & IORESOURCE_CACHEABLE)
60 return ioremap(start, len);
61 return ioremap_nocache(start, len);
67 EXPORT_SYMBOL(pci_iomap);
69 void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
74 EXPORT_SYMBOL(pci_iounmap);