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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [mips/] [lib/] [iomap-pci.c] - Rev 3
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/* * Implement the default iomap interfaces * * (C) Copyright 2004 Linus Torvalds * (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org> * (C) Copyright 2007 MIPS Technologies, Inc. * written by Ralf Baechle <ralf@linux-mips.org> */ #include <linux/pci.h> #include <linux/module.h> #include <asm/io.h> static void __iomem *ioport_map_pci(struct pci_dev *dev, unsigned long port, unsigned int nr) { struct pci_controller *ctrl = dev->bus->sysdata; unsigned long base = ctrl->io_map_base; /* This will eventually become a BUG_ON but for now be gentle */ if (unlikely(!ctrl->io_map_base)) { struct pci_bus *bus = dev->bus; char name[8]; while (bus->parent) bus = bus->parent; ctrl->io_map_base = base = mips_io_port_base; sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number); printk(KERN_WARNING "io_map_base of root PCI bus %s unset. " "Trying to continue but you better\nfix this issue or " "report it to linux-mips@linux-mips.org or your " "vendor.\n", name); #ifdef CONFIG_PCI_DOMAINS panic("To avoid data corruption io_map_base MUST be set with " "multiple PCI domains."); #endif } return (void __iomem *) (ctrl->io_map_base + port); } /* * Create a virtual mapping cookie for a PCI BAR (memory or IO) */ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { unsigned long start = pci_resource_start(dev, bar); unsigned long len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len || !start) return NULL; if (maxlen && len > maxlen) len = maxlen; if (flags & IORESOURCE_IO) return ioport_map_pci(dev, start, len); if (flags & IORESOURCE_MEM) { if (flags & IORESOURCE_CACHEABLE) return ioremap(start, len); return ioremap_nocache(start, len); } /* What? */ return NULL; } EXPORT_SYMBOL(pci_iomap); void pci_iounmap(struct pci_dev *dev, void __iomem * addr) { iounmap(addr); } EXPORT_SYMBOL(pci_iounmap);