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Diffstat (limited to 'docs/porting-guide.rst')
-rw-r--r-- | docs/porting-guide.rst | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/docs/porting-guide.rst b/docs/porting-guide.rst index f020ec97d0..51d2e64a4d 100644 --- a/docs/porting-guide.rst +++ b/docs/porting-guide.rst @@ -549,6 +549,22 @@ behaviour of the ``assert()`` function (for example, to save memory). doesn't print anything to the console. If ``PLAT_LOG_LEVEL_ASSERT`` isn't defined, it defaults to ``LOG_LEVEL``. +If the platform port uses the Activity Monitor Unit, the following constants +may be defined: + +- **PLAT\_AMU\_GROUP1\_COUNTERS\_MASK** + This mask reflects the set of group counters that should be enabled. The + maximum number of group 1 counters supported by AMUv1 is 16 so the mask + can be at most 0xffff. If the platform does not define this mask, no group 1 + counters are enabled. If the platform defines this mask, the following + constant needs to also be defined. + +- **PLAT\_AMU\_GROUP1\_NR\_COUNTERS** + This value is used to allocate an array to save and restore the counters + specified by ``PLAT_AMU_GROUP1_COUNTERS_MASK`` on CPU suspend. + This value should be equal to the highest bit position set in the + mask, plus 1. The maximum number of group 1 counters in AMUv1 is 16. + File : plat\_macros.S [mandatory] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |