| /* |
| * linux/arch/unicore32/mm/iomap.c |
| * |
| * Code specific to PKUnity SoC and UniCore ISA |
| * |
| * Copyright (C) 2001-2010 GUAN Xue-tao |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * Map IO port and PCI memory spaces so that {read,write}[bwl] can |
| * be used to access this memory. |
| */ |
| #include <linux/module.h> |
| #include <linux/pci.h> |
| #include <linux/ioport.h> |
| #include <linux/io.h> |
| |
| #ifdef __io |
| void __iomem *ioport_map(unsigned long port, unsigned int nr) |
| { |
| /* we map PC lagcy 64K IO port to PCI IO space 0x80030000 */ |
| return (void __iomem *) (unsigned long) |
| io_p2v((port & 0xffff) + PKUNITY_PCILIO_BASE); |
| } |
| EXPORT_SYMBOL(ioport_map); |
| |
| void ioport_unmap(void __iomem *addr) |
| { |
| } |
| EXPORT_SYMBOL(ioport_unmap); |
| #endif |
| |
| #ifdef CONFIG_PCI |
| void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) |
| { |
| resource_size_t start = pci_resource_start(dev, bar); |
| resource_size_t 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(start, len); |
| if (flags & IORESOURCE_MEM) { |
| if (flags & IORESOURCE_CACHEABLE) |
| return ioremap(start, len); |
| return ioremap_nocache(start, len); |
| } |
| return NULL; |
| } |
| EXPORT_SYMBOL(pci_iomap); |
| #endif |