Quick linux question

Li-Ta Lo ollie at lanl.gov
Thu Feb 26 12:32:01 CET 2004

On Wed, 2004-02-25 at 12:05, Dave Ashley wrote:
> This is off-topic but I'm hoping someone here will know the answer.
> In the linux kernel I need to make a module that will map the BOOTROM
> of an RTL8139 based network card into PCI memory somewhere. I need to
> write the pci config longword at offset 0x30 with the bus address. I can
> arbitrarily pick one such as 0xd2000000 and the bootrom appears as expected,
> but I don't want to step on anything else that might be using that memory
> area. How can I allocate a block of memory in pci address space to know
> where to safely map in the bootrom? Also I'll want to free the allocation
> on module exit.

You probably need ioremap() and iounmap().


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