projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5924486d RK |
1 | /* |
| 2 | * linux/arch/arm/mm/iomap.c | |
| 3 | * | |
| 4 | * Map IO port and PCI memory spaces so that {read,write}[bwl] can | |
| 5 | * be used to access this memory. | |
| 6 | */ | |
| 7 | #include <linux/module.h> | |
| 8 | #include <linux/pci.h> | |
| 9 | #include <linux/ioport.h> | |
| 10 | ||
| 11 | #include <asm/io.h> | |
| 12 | ||
| 13 | #ifdef __io | |
| 14 | void __iomem *ioport_map(unsigned long port, unsigned int nr) | |
| 15 | { | |
| 16 | return __io(port); | |
| 17 | } | |
| 18 | EXPORT_SYMBOL(ioport_map); | |
| 19 | ||
| 20 | void ioport_unmap(void __iomem *addr) | |
| 21 | { | |
| 22 | } | |
| 23 | EXPORT_SYMBOL(ioport_unmap); | |
| 24 | #endif | |
| 25 | ||
| 26 | #ifdef CONFIG_PCI | |
| 27 | void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) | |
| 28 | { | |
| 29 | unsigned long start = pci_resource_start(dev, bar); | |
| 30 | unsigned long len = pci_resource_len(dev, bar); | |
| 31 | unsigned long flags = pci_resource_flags(dev, bar); | |
| 32 | ||
| 33 | if (!len || !start) | |
| 34 | return NULL; | |
| 35 | if (maxlen && len > maxlen) | |
| 36 | len = maxlen; | |
| 37 | if (flags & IORESOURCE_IO) | |
| 38 | return ioport_map(start, len); | |
| 39 | if (flags & IORESOURCE_MEM) { | |
| 40 | if (flags & IORESOURCE_CACHEABLE) | |
| 41 | return ioremap(start, len); | |
| 42 | return ioremap_nocache(start, len); | |
| 43 | } | |
| 44 | return NULL; | |
| 45 | } | |
| 46 | EXPORT_SYMBOL(pci_iomap); | |
| 47 | ||
| 48 | void pci_iounmap(struct pci_dev *dev, void __iomem *addr) | |
| 49 | { | |
| 50 | if ((unsigned long)addr >= VMALLOC_START && | |
| 51 | (unsigned long)addr < VMALLOC_END) | |
| 52 | iounmap(addr); | |
| 53 | } | |
| 54 | EXPORT_SYMBOL(pci_iounmap); | |
| 55 | #endif |