[PATCH 0/3] SRAM map series

[PATCH 0/3] SRAM map series

[Santosh Shilimkar]

Currently we map 1 MB section while setting up SRAM on OMAPs.
The actual physcal OCM RAM available on OMAP SOCs is in order
of KBs. On the newer ARMs with speculation, this is dangerous and can
result in untraceable aborts.
On Davinci as well because of section limitation the SRAM is
marked as MT_DEVICE

First patch of this series addresses the section mapping limiaton and
now we can map such memories as page level granularity.

The series is generated against latest manline commit "2d530569730"
and boot tested on OMAP4430SDP, OMAP3430SDP platforms with 
omap_4430sdp_defconfig and multi-omap(omap3_defconfig) builds

Santosh Shilimkar (3):
  ARM: mmu: Setup MT_MEMORY and MT_MEMORY_NONACHED L1 entries
  omap1/2/3/4: map only available SRAM
  davinci: Map sram using MT_MEMORY_NONCACHED instead of MT_DEVICE

 arch/arm/mach-davinci/dm355.c  |    3 +--
 arch/arm/mach-davinci/dm365.c  |    3 +--
 arch/arm/mach-davinci/dm644x.c |    3 +--
 arch/arm/mach-davinci/dm646x.c |    3 +--
 arch/arm/mm/mmu.c              |   18 ++++++++++++++++--
 arch/arm/plat-omap/sram.c      |   25 +++++--------------------
 6 files changed, 25 insertions(+), 30 deletions(-)

RE: [PATCH 0/3] SRAM map series

[Shilimkar, Santosh]

Tony/Kevin,
> -----Original Message-----
> From: Shilimkar, Santosh
> Sent: Sunday, August 08, 2010 3:46 PM
> To: linux-omap@vger.kernel.org
> Cc: linux-arm-kernel@lists.infradead.org; Shilimkar, Santosh
> Subject: [PATCH 0/3] SRAM map series
> 
> Currently we map 1 MB section while setting up SRAM on OMAPs.
> The actual physcal OCM RAM available on OMAP SOCs is in order
> of KBs. On the newer ARMs with speculation, this is dangerous and can
> result in untraceable aborts.
> On Davinci as well because of section limitation the SRAM is
> marked as MT_DEVICE
> 
> First patch of this series addresses the section mapping limiaton and
> now we can map such memories as page level granularity.
> 
> The series is generated against latest manline commit "2d530569730"
> and boot tested on OMAP4430SDP, OMAP3430SDP platforms with
> omap_4430sdp_defconfig and multi-omap(omap3_defconfig) builds
> 
> Santosh Shilimkar (3):
>   ARM: mmu: Setup MT_MEMORY and MT_MEMORY_NONACHED L1 entries
>   omap1/2/3/4: map only available SRAM
>   davinci: Map sram using MT_MEMORY_NONCACHED instead of MT_DEVICE
> 
Can you please have a look at second and third patch?
First patch is reviewed by Russell already

>  arch/arm/mach-davinci/dm355.c  |    3 +--
>  arch/arm/mach-davinci/dm365.c  |    3 +--
>  arch/arm/mach-davinci/dm644x.c |    3 +--
>  arch/arm/mach-davinci/dm646x.c |    3 +--
>  arch/arm/mm/mmu.c              |   18 ++++++++++++++++--
>  arch/arm/plat-omap/sram.c      |   25 +++++--------------------
>  6 files changed, 25 insertions(+), 30 deletions(-)