Date: Thu, 06 Apr 2000 16:14:03 -0400 From: "Gary T. Corcoran" <gcorcoran@lucent.com> To: Warner Losh <imp@village.org> Cc: freebsd-hackers@freebsd.org Subject: Re: How to get multiple PCI I/O base addresses in attach()? Message-ID: <38ECF00B.CA0AD45B@lucent.com> References: <38EC3755.DA40DEC8@home.com>
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Warner,
> rid = 0x10;
> res1 = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 1, RF_ACTIVE);
...
> should do the trick. Change SYS_RES_MEMORY to SYS_RES_IOPORT if it is
> I/O mapped rather than memory mapped.
>
> In case it wasn't clear, the rid is the offset into the config space
> where the BAR register that you want to use is. Multiples of 4 only
> need apply.
Thanks, that helps. BUT...
At first I thought "res1" would be the base address I was looking for.
However, it appears (boy I wish this stuff was documented!) that
bus_alloc_resource returns a "struct resource *". But I looked and
looked and I can't find the definition of what a "struct resource" is.
So I'm still in the dark as to how to get my I/O base address from
the pointer returned by the bus_alloc_resource. How do I do that?
Thanks,
Gary
--
=========================================================
Gary Corcoran - Distinguished Member of Technical Staff
Lucent Microelectronics - Client Access Broadband Systems
Communications Protocol & Driver Development Group
"We make the drivers that make communications work"
Email: gcorcoran@lucent.com
---------------------------------------------------------
There are only two kinds of machines - those that fail
little by little, and those that fail all at once.
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