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authorSascha Hauer <s.hauer@pengutronix.de>2016-09-29 14:38:07 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2016-09-29 14:38:07 +0200
commitd9a15385467936649b6c2cfeb7ab377002ddce0f (patch)
tree39175107fc884a29fbba83f47d104f493833fe19 /dts/Bindings/reserved-memory
parentbfe946c9593513b0ad1b440bcd997b263487b945 (diff)
downloadbarebox-d9a15385467936649b6c2cfeb7ab377002ddce0f.tar.gz
barebox-d9a15385467936649b6c2cfeb7ab377002ddce0f.tar.xz
dts: update to v4.8-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'dts/Bindings/reserved-memory')
-rw-r--r--dts/Bindings/reserved-memory/ramoops.txt48
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diff --git a/dts/Bindings/reserved-memory/ramoops.txt b/dts/Bindings/reserved-memory/ramoops.txt
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+Ramoops oops/panic logger
+=========================
+
+ramoops provides persistent RAM storage for oops and panics, so they can be
+recovered after a reboot. This is a child-node of "/reserved-memory", and
+is named "ramoops" after the backend, rather than "pstore" which is the
+subsystem.
+
+Parts of this storage may be set aside for other persistent log buffers, such
+as kernel log messages, or for optional ECC error-correction data. The total
+size of these optional buffers must fit in the reserved region.
+
+Any remaining space will be used for a circular buffer of oops and panic
+records. These records have a configurable size, with a size of 0 indicating
+that they should be disabled.
+
+At least one of "record-size", "console-size", "ftrace-size", or "pmsg-size"
+must be set non-zero, but are otherwise optional as listed below.
+
+
+Required properties:
+
+- compatible: must be "ramoops"
+
+- reg: region of memory that is preserved between reboots
+
+
+Optional properties:
+
+- ecc-size: enables ECC support and specifies ECC buffer size in bytes
+ (defaults to 0: no ECC)
+
+- record-size: maximum size in bytes of each dump done on oops/panic
+ (defaults to 0: disabled)
+
+- console-size: size in bytes of log buffer reserved for kernel messages
+ (defaults to 0: disabled)
+
+- ftrace-size: size in bytes of log buffer reserved for function tracing and
+ profiling (defaults to 0: disabled)
+
+- pmsg-size: size in bytes of log buffer reserved for userspace messages
+ (defaults to 0: disabled)
+
+- unbuffered: if present, use unbuffered mappings to map the reserved region
+ (defaults to buffered mappings)
+
+- no-dump-oops: if present, only dump panics (defaults to panics and oops)