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linux-doc-2.6.15_2.6.15-23.39_all 
NAME
ioremap - map bus memory into CPU space
SYNOPSIS
void __iomem * ioremap (unsigned long 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.
AUTHORS
Matthew Wilcox <matthew@wil.cx>, Alan Cox <alan@redhat.com>.