Date: Sun, 18 Mar 2001 13:19:11 -0800 From: Mike Smith <msmith@freebsd.org> To: Alexey Dokuchaev <danfe@inet.ssc.nsu.ru> Cc: freebsd-hackers@freebsd.org Subject: Re: Some PCI-related programming things Message-ID: <200103182119.f2ILJBL01279@mass.dis.org> In-Reply-To: Your message of "Mon, 19 Mar 2001 02:16:23 %2B0600." <Pine.LNX.4.10.10103190158060.7285-100000@inet.ssc.nsu.ru>
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> Hello there,
>
> Under linux, PCI stuff is generally done thru set of pci* functions, while
> under FreeBSD there are ioctls provided by pci driver. I've been doing
> some code migration from linux to FreeBSD, and got thru most of it, except
> for things like this one:
You are probably doing something very wrong here, but rather than try to
convince you to do it, right, I'll just answer your question. 8)
> <code ostype="linux">
> . . .
> pcibios_read_config_dword(bus_id, func_id, PCI_BASE_ADDRESS_0, &addr_0);
> addr_0 &= PCI_BASE_ADDRESS_IO_MASK;
> pcibios_read_config_dword(bus_id, func_id, PCI_BASE_ADDRESS_1, &addr_1);
> addr_1 &= PCI_BASE_ADDRESS_MEM_MASK;
> . . .
> </code>
>
> I am not quite sure how to code the same thing under FreeBSD, particulary:
>
> pi.pi_width = 4;
> pi.pi_reg = <WHAT DO I PUT HERE?>
> ioctl(fd, PCIOCREAD, &pi);
You put PCI_BASE_ADDRESS_0, or PCIR_MAPS if you're using our headers.
PCI_BASE_ADDRESS_1 is typically PCIR_MAPS + 4
> Could anyone give me an example for both addr_0 and addr_1 (that is,
> translation of the linux code I cited above?)
Er, you don't. You'll get the value you've read in pi.pi_data.
--
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rivals and unfortunately opponents also. But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view. [Dr. Fritz Todt]
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