On Sat, Sep 27, 2008 at 03:35:27AM +0400, Ilya Yanok wrote:
> Hello David,
>
> David Gibson wrote:
>> I don't see any reason to have a separate set of config options for 32
>> and 64-bit. Just make the once choice, but only have the individual
>> pagesize options enabled on machines that support t
Hello Benjamin,
Benjamin Herrenschmidt wrote:
[snip]
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index fce2df9..4f802df 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -20,7 +20,9 @@
beq 1f;
Hello David,
David Gibson wrote:
I don't see any reason to have a separate set of config options for 32
and 64-bit. Just make the once choice, but only have the individual
pagesize options enabled on machines that support them.
Well. I can see some. First, on PPC64 kernel emulates 64K page
On Sat, 13 Sep 2008 10:49:13 -0700
Benjamin Herrenschmidt <[EMAIL PROTECTED]> wrote:
> On Thu, 2008-09-11 at 09:57 -0700, prodyut hazarika wrote:
>
> > You should mention an example of dedicated cases (eg. RAID).
> > I think this help should mention that for page size 256KB, you will
> > need to
On Thu, 2008-09-11 at 09:57 -0700, prodyut hazarika wrote:
> You should mention an example of dedicated cases (eg. RAID).
> I think this help should mention that for page size 256KB, you will
> need to have a special version of binutils, since the ELF standard
> mentions page sizes only upto 64KB.
> [snip]
> > diff --git a/arch/powerpc/kernel/head_booke.h
> > b/arch/powerpc/kernel/head_booke.h
> > index fce2df9..4f802df 100644
> > --- a/arch/powerpc/kernel/head_booke.h
> > +++ b/arch/powerpc/kernel/head_booke.h
> > @@ -20,7 +20,9 @@
> > beq 1f;
On Thu, Sep 11, 2008 at 01:53:06AM +0400, Ilya Yanok wrote:
> This patch adds support for page sizes bigger than 4KB (16KB/64KB/256KB) on
> PPC 44x.
[snip]
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 587da5e..ca93157 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/K
On Fri, 12 Sep 2008 03:38:39 +0400
Ilya Yanok <[EMAIL PROTECTED]> wrote:
> Hello Josh,
>
> Josh Boyer wrote:
> > Ok, but not everyone does. And I think setting the page size to this
> > should be harder, maybe even dependent upon CONFIG_BROKEN.
> >
>
> Well, we are violating ELF standard her
Hello Josh,
Josh Boyer wrote:
Ok, but not everyone does. And I think setting the page size to this
should be harder, maybe even dependent upon CONFIG_BROKEN.
Well, we are violating ELF standard here... CONFIG_BROKEN seems to be
adequate for me.
I need to look over the patch a bit more,
Hi,
prodyut hazarika wrote:
In file arch/powerpc/mm/pgtable_32.c, we have:
#ifdef CONFIG_PTE_64BIT
/* 44x uses an 8kB pgdir because it has 8-byte Linux PTEs. */
#define PGDIR_ORDER 1
#else
#define PGDIR_ORDER 0
#endif
pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *ret;
>/*
> * Create WS1. This is the faulting address (EPN),
> * page size, and valid flag.
> */
> - li r11,PPC44x_TLB_VALID | PPC44x_TLB_4K
> + li r11,PPC44x_TLB_VALID | PPC44x_TLBE_SIZE
>rlwimi r10,r11,0,20,31 /* Insert val
Hi,
prodyut hazarika wrote:
Also, it would be great if you could point me what changes are
necessary to recompile the binutils.
I would like to test the 256KB changes on my Canyonlands board. I have
got 16KB/64KB working.
I think this should be enough:
--- binutils-2.16.1/ld/emulparams/elf
On Thu, Sep 11, 2008 at 10:15:07PM +0400, Yuri Tikhonov wrote:
>> I think this help should mention that for page size 256KB, you will
>> need to have a special version of binutils, since the ELF standard
>> mentions page sizes only upto 64KB.
>
> Right. We use ELDK-4.2 for compiling applications to
>
> Any comments on the issues mentioned in introductory message?
>
I am reviewing the changes more thoroughly. I will give additional
comments within the next 2-3 days.
I am working on putting similar support for 405EX (Kilauea board), but
having some issues.
I will post the patch after I am done
>
> I think you missed first '-' on the first line.
>
I was not too careful :-)
>> I think these 44x specific defines should go to asm/mmu-44x.h since I
>>
>
> Agreed.
>
It would be great to have user-friendly names.
Also moving to the mmu-4xx specific header files hides the changes to 4xx files.
Hi,
prodyut hazarika wrote:
>> +choice
>> + prompt "Page size"
>> + depends on 44x && PPC32
>> + default PPC32_4K_PAGES
>> + help
>> + The PAGE_SIZE definition. Increasing the page size may
>> + improve the system performance in some dedicated cases.
>> +
I was planning to post a similar patch. Good that you already posted
it :-) I will try to finish off similar patch for 40x processors.
>
> +choice
> + prompt "Page size"
> + depends on 44x && PPC32
> + default PPC32_4K_PAGES
> + help
> + The PAGE_SIZE definition. In
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