lkml.org 
[lkml]   [2004]   [Apr]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: How does ioremap() get non-cached mappings
Nagendra Singh Tomar wrote:
> ioremap() function in x86 arch code does not seem to be setting _PAGE_PCD
> bit in the PTE. How then does it give non-cached mapping to MMIO mappings
> for memory on some interface card. I have gone thru some old threads on
> this, which have concluded that it does give non-cached mappings, and
> moerover ioremap seems to work fine whenever I have used to map any PCI
> card memory,
> Is it guaranteed thru the means of MTRR ?
>

ioremap_nocache()

--
Brian Gerst
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:02    [W:0.103 / U:0.148 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site