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Groups > linux.kernel > #1660721
| From | Chris Packham <chris.packham@alliedtelesis.co.nz> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC PATCH 3/4] ARM: l2x0: add arm,ecc-enable property for aurora |
| Date | 2017-06-08 06:20 +0200 |
| Message-ID | <tPX5n-7J4-1@gated-at.bofh.it> (permalink) |
| References | <tPX5n-7J4-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
The aurora cache on the Marvell Armada-XP SoC supports ECC protection
for the L2 data arrays. Add a "arm,ecc-enable" device tree property
which can be used to enable this.
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
---
Documentation/devicetree/bindings/arm/l2c2x0.txt | 2 ++
arch/arm/mm/cache-l2x0.c | 7 +++++++
2 files changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/l2c2x0.txt b/Documentation/devicetree/bindings/arm/l2c2x0.txt
index d9650c1788f4..6316e673307a 100644
--- a/Documentation/devicetree/bindings/arm/l2c2x0.txt
+++ b/Documentation/devicetree/bindings/arm/l2c2x0.txt
@@ -76,6 +76,8 @@ Optional properties:
specified to indicate that such transforms are precluded.
- arm,parity-enable : enable parity checking on the L2 cache (L220 or PL310).
- arm,parity-disable : disable parity checking on the L2 cache (L220 or PL310).
+- arm,ecc-enable : enable ECC protection on the L2 cache
+- arm,ecc-disable : disable ECC protection on the L2 cache
- arm,outer-sync-disable : disable the outer sync operation on the L2 cache.
Some core tiles, especially ARM PB11MPCore have a faulty L220 cache that
will randomly hang unless outer sync operations are disabled.
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index 2cc2653b046f..4f0e6d9b151d 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -1505,6 +1505,13 @@ static void __init aurora_of_parse(const struct device_node *np,
mask |= AURORA_ACR_FORCE_WRITE_POLICY_MASK;
}
+ if (of_property_read_bool(np, "arm,ecc-enable")) {
+ mask |= L2C_AUX_CTRL_EVTMON_ENABLE;
+ val |= L2C_AUX_CTRL_EVTMON_ENABLE;
+ } else if (of_property_read_bool(np, "arm,ecc-disable")) {
+ mask |= L2C_AUX_CTRL_EVTMON_ENABLE;
+ }
+
if (of_property_read_bool(np, "arm,parity-enable")) {
mask |= L2C_AUX_CTRL_PARITY_ENABLE;
val |= L2C_AUX_CTRL_PARITY_ENABLE;
--
2.13.0
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[RFC PATCH 3/4] ARM: l2x0: add arm,ecc-enable property for aurora Chris Packham <chris.packham@alliedtelesis.co.nz> - 2017-06-08 06:20 +0200
Re: [RFC PATCH 3/4] ARM: l2x0: add arm,ecc-enable property for aurora Jan Lübbe <jlu@pengutronix.de> - 2017-06-09 11:00 +0200
Re: [RFC PATCH 3/4] ARM: l2x0: add arm,ecc-enable property for aurora Chris Packham <Chris.Packham@alliedtelesis.co.nz> - 2017-06-12 01:00 +0200
Re: [RFC PATCH 3/4] ARM: l2x0: add arm,ecc-enable property for aurora Rob Herring <robh@kernel.org> - 2017-06-09 18:30 +0200
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