lkml.org 
[lkml]   [2007]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH -mm -v4 1/3] i386/x86_64 boot: setup data
On 10/9/07, Andi Kleen <ak@suse.de> wrote:
>
> > Care to add a line of documentation if you keep it in mm/memory.c?
>
> It would be better to just use early_ioremap() (or ioremap())
>
> That is how ACPI who has similar issues accessing its tables solves this.

Yes. That is another solution. But there is some problem about
early_ioremap (boot_ioremap, bt_ioremap for i386) or ioremap.

- ioremap can not be used before mem_init.
- For i386, boot_ioremap can map at most 4 pages, bt_ioremap can map
at most 16 pages. This will be an unnecessary constrains for size of
setup_data.
- For i386, the virtual memory space of ioremap is limited too.

Best Regards,
Huang Ying
-
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: 2007-10-09 16:03    [from the cache]
©2003-2011 Jasper Spaans