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9#include <linux/pci.h>
10#include <linux/module.h>
11#include <asm/io.h>
12
13static void __iomem *ioport_map_pci(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
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
44
45
46void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
47{
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);
51
52 if (!len || !start)
53 return NULL;
54 if (maxlen && len > maxlen)
55 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);
62 }
63
64 return NULL;
65}
66
67EXPORT_SYMBOL(pci_iomap);
68
69void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
70{
71 iounmap(addr);
72}
73
74EXPORT_SYMBOL(pci_iounmap);
75