Pardon my bad phrasing of the original question. I have a mem-mapped PCI
controller which has no on-board memory, but is asking for 32MB memory
resource. Is this legal? While BIOS gives it 32MB address space, who is going
to malloc and give it the required memory to work with?
Thanks - Baski
Myles Watson <[EMAIL PROTECTED]> wrote: v\:*
{behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:*
{behavior:url(#default#VML);} .shape {behavior:url(#default#VML);}
Im guessing that youre asking if it has to have as much memory as the
resource. If thats the case, the answer is no. You just have to respond to
any request in that region.
In other words, you could request a 1 GB region and only respond with useful
data in the first 1 MB (respond to any other read with zeros), or map the 1 MB
1024 times into the 1 GB, or anything else you decide.
Sorry if I totally missed the intent of your question,
Myles
---------------------------------
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Baski
Sent: Wednesday, January 09, 2008 7:06 PM
To: linuxbios@linuxbios.org
Subject: [LinuxBIOS] PCI device memory resource
For a PCI device to request memory resource of ,say 1MB, should it have
onboard
memory of 1MB ?
TIA
--
People wielding power and authority always desire to destroy the sources which
gave them that power. Or, is it the other way round?
---------------------------------
Never miss a thing. Make Yahoo your homepage.
--
People wielding power and authority always desire to destroy the sources which
gave them that power. Or, is it the other way round?
---------------------------------
Never miss a thing. Make Yahoo your homepage.--
linuxbios mailing list
linuxbios@linuxbios.org
http://www.linuxbios.org/mailman/listinfo/linuxbios
