large page support for IOP331

large page support for IOP331

[Prashant Bhole]

Hi All,
I am using kernel 2.6.24 for a custom hardware with IOP331 processor.

Is there any support of large page for arm architecture?

I tried to change the page size by changing PAGE_SHIFT to make page
 size 8K/16K. But kernel didn't boot.
Am I missing something?


Thanks,

-- 
~p~r~a~s~h~a~n~t~

large page support for IOP331

[Russell King - ARM Linux]

On Wed, Feb 24, 2010 at 02:30:30PM +0530, Prashant Bhole wrote:
> Is there any support of large page for arm architecture?

The short answer is no.

The long answer is that to have 16K pages, it causes bigger problems
with the 2nd level page tables, which from the hardware perspective
are only 256 per L1 entry, but are required to be in unique pages.

large page support for IOP331

[Prashant Bhole]

On Wed, Feb 24, 2010 at 2:41 PM, Russell King - ARM Linux
<linux@arm.linux.org.uk> wrote:
> On Wed, Feb 24, 2010 at 02:30:30PM +0530, Prashant Bhole wrote:
>> Is there any support of large page for arm architecture?
>
> The short answer is no.
>
> The long answer is that to have 16K pages, it causes bigger problems
> with the 2nd level page tables, which from the hardware perspective
> are only 256 per L1 entry, but are required to be in unique pages.
>

But we have 64 bit memory subsystem for IOP331 and
IOP331 developer's manual:

http://download.intel.com/design/iio/manuals/27394202.pdf

Page number 452, Table 218 says that we can have 8K and 16K
pages. Please correct me if I am wrong

-- 
~p~r~a~s~h~a~n~t~

large page support for IOP331

[Prashant Bhole]

Hi All,
I am using kernel 2.6.24 for a custom hardware with IOP331 processor.

Is there any support of large page for arm architecture?

I tried to change the page size by changing PAGE_SHIFT to make page
?size 8K/16K. But kernel didn't boot.
Am I missing something?


Thanks,
--
~p~r~a~s~h~a~n~t~