diff options
Diffstat (limited to 'Documentation/devicetree/bindings/reserved-memory/ramoops.txt')
-rw-r--r-- | Documentation/devicetree/bindings/reserved-memory/ramoops.txt | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/Documentation/devicetree/bindings/reserved-memory/ramoops.txt b/Documentation/devicetree/bindings/reserved-memory/ramoops.txt deleted file mode 100644 index b571ef6dab0f..000000000000 --- a/Documentation/devicetree/bindings/reserved-memory/ramoops.txt +++ /dev/null @@ -1,66 +0,0 @@ -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 kmsg dump. - (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) - -- mem-type: if present, sets the type of mapping is to be used to map the - reserved region. mem-type: 0 = write-combined (default), 1 = unbuffered, - 2 = cached. - -- unbuffered: deprecated, use mem_type instead. If present, and mem_type is - not specified, it is equivalent to mem_type = 1 and uses unbuffered mappings - to map the reserved region (defaults to buffered mappings mem_type = 0). If - both are specified -- "mem_type" overrides "unbuffered". - -- max-reason: if present, sets maximum type of kmsg dump reasons to store - (defaults to 2: log Oopses and Panics). This can be set to INT_MAX to - store all kmsg dumps. See include/linux/kmsg_dump.h KMSG_DUMP_* for other - kmsg dump reason values. Setting this to 0 (KMSG_DUMP_UNDEF), means the - reason filtering will be controlled by the printk.always_kmsg_dump boot - param: if unset, it will be KMSG_DUMP_OOPS, otherwise KMSG_DUMP_MAX. - -- no-dump-oops: deprecated, use max_reason instead. If present, and - max_reason is not specified, it is equivalent to max_reason = 1 - (KMSG_DUMP_PANIC). - -- flags: if present, pass ramoops behavioral flags (defaults to 0, - see include/linux/pstore_ram.h RAMOOPS_FLAG_* for flag values). |