diff options
| author | Bharata B Rao <bharata@linux.vnet.ibm.com> | 2018-04-19 12:17:35 +0530 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2018-04-27 18:05:23 +1000 |
| commit | a324d6f166970f8f6a82c61ffd2356fbda81c8f4 (patch) | |
| tree | f666b4896513df4f4dcf23df907941c4cba6087c /docs | |
| parent | 03f048090ee73bfb18b16a5dc462b5411120fb4d (diff) | |
spapr: Support ibm,dynamic-memory-v2 property
The new property ibm,dynamic-memory-v2 allows memory to be represented
in a more compact manner in device tree.
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/specs/ppc-spapr-hotplug.txt | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/docs/specs/ppc-spapr-hotplug.txt b/docs/specs/ppc-spapr-hotplug.txt index f57e2a09c6..cc7833108e 100644 --- a/docs/specs/ppc-spapr-hotplug.txt +++ b/docs/specs/ppc-spapr-hotplug.txt @@ -387,4 +387,23 @@ Each LMB list entry consists of the following elements: - A 32bit flags word. The bit at bit position 0x00000008 defines whether the LMB is assigned to the the partition as of boot time. +ibm,dynamic-memory-v2 + +This property describes the dynamically reconfigurable memory. This is +an alternate and newer way to describe dyanamically reconfigurable memory. +It is a property encoded array that has an integer N (the number of +LMB set entries) followed by N LMB set entries. There is an LMB set entry +for each sequential group of LMBs that share common attributes. + +Each LMB set entry consists of the following elements: + +- Number of sequential LMBs in the entry represented by a 32bit integer. +- Logical address of the first LMB in the set encoded as a 64bit integer. +- DRC index of the first LMB in the set. +- Associativity list index that is used as an index into + ibm,associativity-lookup-arrays property described earlier. This + is used to retrieve the right associativity list to be used for all + the LMBs in this set. +- A 32bit flags word that applies to all the LMBs in the set. + [1] http://thread.gmane.org/gmane.linux.ports.ppc.embedded/75350/focus=106867 |