mirror of https://gitee.com/openkylin/linux.git
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
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/*
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* Implement the sparc iomap interfaces
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*/
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#include <linux/pci.h>
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#include <linux/module.h>
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#include <asm/io.h>
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/* Create a virtual mapping cookie for an IO port range */
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void __iomem *ioport_map(unsigned long port, unsigned int nr)
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{
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return (void __iomem *) (unsigned long) port;
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}
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void ioport_unmap(void __iomem *addr)
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{
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/* Nothing to do */
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}
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EXPORT_SYMBOL(ioport_map);
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EXPORT_SYMBOL(ioport_unmap);
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/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
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void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
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{
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unsigned long start = pci_resource_start(dev, bar);
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unsigned long len = pci_resource_len(dev, bar);
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unsigned long flags = pci_resource_flags(dev, bar);
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if (!len || !start)
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return NULL;
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if (maxlen && len > maxlen)
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len = maxlen;
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if (flags & IORESOURCE_IO)
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return ioport_map(start, len);
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if (flags & IORESOURCE_MEM) {
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if (flags & IORESOURCE_CACHEABLE)
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return ioremap(start, len);
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return ioremap_nocache(start, len);
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}
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/* What? */
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return NULL;
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}
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void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
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{
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/* nothing to do */
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}
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EXPORT_SYMBOL(pci_iomap);
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EXPORT_SYMBOL(pci_iounmap);
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