centos man page for ioremap_nocache

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
Kernel Hackers Manual 3.10					     June 2014							IOREMAP_NOCACHE(9)