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| IOREMAP_NOCACHE(9) | Public Functions Provided | IOREMAP_NOCACHE(9) |
NAME¶
ioremap_nocache - map bus memory into CPU space
SYNOPSIS¶
void __iomem * ioremap_nocache(resource_size_t offset, unsigned long size);
ARGUMENTS¶
offset
bus address of the memory
size
size of the resource to map
DESCRIPTION¶
ioremap performs a platform specific sequence of operations to make bus memory CPU accessible via the readb/readw/readl/writeb/ writew/writel functions and the other mmio helpers. The returned address is not guaranteed to be usable directly as a virtual address.
If the area you are trying to map is a PCI BAR you should have a look at pci_iomap.
AUTHORS¶
Matthew Wilcox <matthew@wil.cx>
Author.
Alan Cox <alan@lxorguk.ukuu.org.uk>
Author.
COPYRIGHT¶
| January 2017 | Kernel Hackers Manual 4.8. |