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[0/5] Handle non-secure L2C initialization on Exynos4

Message ID 539B11EB.6010304@samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Tomasz Figa June 13, 2014, 2:59 p.m. UTC 
Hi Daniel,

I have attached, three patches which make the kernel boot fine with L2
cache enabled on ODROID-U3. Could you test them on your setup to verify
that they indeed fix the issue?

Best regards,
Tomasz

On 12.06.2014 15:38, Daniel Drake wrote:
> Hi Tomasz,
> 
> Thanks for working on this!
> 
> I have just tried this, against Linus master
> 64b2d1fbbfda07765dae3f601862796a61b2c451.
> Added patch "ARM: dts: Initial ODROID U2 support" and booted on
> ODROID-U2. I believe this board has the security enabled.
> 
> Unfortunately, it hangs during early boot. With earlyprintk the last
> messages seen are:
> 
> L2C: platform modifies aux control register: 0x02070000 -> 0x3e470001
> L2C: platform provided aux values permit register corruption.
> L2C: DT/platform modifies aux control register: 0x02070000 -> 0x3e470001
> L2C-310 enabling early BRESP for Cortex-A9
> L2C-310: enabling full line of zeros but not enabled in Cortex-A9
> L2C-310 ID prefetch enabled, offset 1 lines
> L2C-310 dynamic clock gating enabled, standby mode enabled
> L2C-310 cache controller enabled, 16 ways, 1024 kB
> L2C-310: CACHE_ID 0x4100c4c8, AUX_CTRL 0x7e470001
> 
> I then tried to go back to the earlier patch "ARM: EXYNOS: Add secure
> firmware support for l2x0 init" (attached, needed a rebase) but that
> one also now hangs at:
> 
> L2C: platform modifies aux control register: 0x02070000 -> 0x3e470001
> 
> It did work on 3.14 though. Looking at the changelogs, many changes
> have been made to l2x0 recently. Can you confirm that you have tested
> your patches against a kernel with all of Russell King's recent
> changes?
> 
> Thanks
> Daniel
>

Comments

Daniel Drake June 17, 2014, 11:45 a.m. UTC | #1 
Hi,

On Fri, Jun 13, 2014 at 3:59 PM, Tomasz Figa <t.figa@samsung.com> wrote:
> I have attached, three patches which make the kernel boot fine with L2
> cache enabled on ODROID-U3. Could you test them on your setup to verify
> that they indeed fix the issue?

Nice work, now my ODROID-U2 boots fine.

L2C: platform modifies aux control register: 0x02070000 -> 0x3e470001
L2C: platform provided aux values permit register corruption.
L2C: DT/platform modifies aux control register: 0x02070000 -> 0x3e470001
L2C-310 enabling early BRESP for Cortex-A9
L2C-310: enabling full line of zeros but not enabled in Cortex-A9
L2C-310 ID prefetch enabled, offset 8 lines
L2C-310 dynamic clock gating enabled, standby mode enabled
L2C-310 cache controller enabled, 16 ways, 1024 kB
L2C-310: CACHE_ID 0x4100c4c8, AUX_CTRL 0x7e470001

Thanks!
Daniel
diff mbox

Patch

From 032125d7f099d9160ad98371313a829131ebed8c Mon Sep 17 00:00:00 2001
From: Tomasz Figa <t.figa@samsung.com>
Date: Fri, 13 Jun 2014 16:49:09 +0200
Subject: [PATCH 3/3] ARM: dts: exynos4x12: Override prefetch settings.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
---
 arch/arm/boot/dts/exynos4x12.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4x12.dtsi b/arch/arm/boot/dts/exynos4x12.dtsi
index 9487f9c..ddffefe 100644
--- a/arch/arm/boot/dts/exynos4x12.dtsi
+++ b/arch/arm/boot/dts/exynos4x12.dtsi
@@ -67,6 +67,11 @@ 
 		cache-level = <2>;
 		arm,tag-latency = <2 2 1>;
 		arm,data-latency = <3 2 1>;
+		arm,double-linefill = <1>;
+		arm,double-linefill-incr = <0>;
+		arm,double-linefill-wrap = <1>;
+		arm,prefetch-drop = <1>;
+		arm,prefetch-offset = <7>;
 	};
 
 	clock: clock-controller@10030000 {
-- 
1.9.3