[LinuxBIOS] usage of pci_write_config32()?
rminnich at gmail.com
Tue Mar 20 05:04:35 CET 2007
On 3/19/07, Corey Osgood <corey_osgood at verizon.net> wrote:
> With pci_write_config32 (or pci_write_config16), do you send the value
> to the first or the last register in the set? In other words, if it's a
> range of 0x50-0x53, where should it be sent to? And if you were looking
> to set it like this:
> 0x50 -> 0x11
> 0x51 -> 0x22
> 0x52 -> 0x33
> 0x53 -> 0x44
> it should be set as 0x11223344, correct? I'm looking at two different
> files, and their usage conflicts, I'd like to know which is right.
I'd like to know where that is.
I believe that since the x86 is a little-endian machine, you actually
want 0x44332211, for the example above, since in 0x44332211, the LSB
will be written "first". I am not near a machine to test this on,
It's pretty easy to test, so, as always, the ultimate truth is in what
happens when you do it.
I hope to be back to life by monday. I just moved to Livermore, CA and
am busy ...
More information about the coreboot