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Diffstat (limited to 'docs/porting-guide.rst')
| -rw-r--r-- | docs/porting-guide.rst | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/docs/porting-guide.rst b/docs/porting-guide.rst index 6c07b2eb3..cd3bcdae4 100644 --- a/docs/porting-guide.rst +++ b/docs/porting-guide.rst @@ -2271,6 +2271,44 @@ appropriate. Implementations are not expected to handle ``power_levels`` greater than ``PLAT_MAX_PWR_LVL``. +plat\_psci\_ops.system\_reset2() +................................ + +This is an optional function. If implemented this function is +called during the ``SYSTEM_RESET2`` call to perform a reset +based on the first parameter ``reset_type`` as specified in +`PSCI`_. The parameter ``cookie`` can be used to pass additional +reset information. If the ``reset_type`` is not supported, the +function must return ``PSCI_E_NOT_SUPPORTED``. For architectural +resets, all failures must return ``PSCI_E_INVALID_PARAMETERS`` +and vendor reset can return other PSCI error codes as defined +in `PSCI`_. On success this function will not return. + +plat\_psci\_ops.write\_mem\_protect() +.................................... + +This is an optional function. If implemented it enables or disables the +``MEM_PROTECT`` functionality based on the value of ``val``. +A non-zero value enables ``MEM_PROTECT`` and a value of zero +disables it. Upon encountering failures it must return a negative value +and on success it must return 0. + +plat\_psci\_ops.read\_mem\_protect() +..................................... + +This is an optional function. If implemented it returns the current +state of ``MEM_PROTECT`` via the ``val`` parameter. Upon encountering +failures it must return a negative value and on success it must +return 0. + +plat\_psci\_ops.mem\_protect\_chk() +................................... + +This is an optional function. If implemented it checks if a memory +region defined by a base address ``base`` and with a size of ``length`` +bytes is protected by ``MEM_PROTECT``. If the region is protected +then it must return 0, otherwise it must return a negative number. + Interrupt Management framework (in BL31) ---------------------------------------- |