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|
OPAL_READ_NVRAM
===============
::
#define OPAL_READ_NVRAM 7
``OPAL_READ_NVRAM`` call requests OPAL to read the data from system NVRAM
memory into a memory buffer. The data at ``offset`` from nvram_image
will be copied to memory ``buffer`` of size ``size``.
Parameters
----------
::
uint64_t buffer
uint64_t size
uint64_t offset
``buffer``
the data from nvram will be copied to ``buffer``
``size``
the data of size ``size`` will be copied
``offset``
the data will be copied from address equal to base ``nvram_image`` plus ``offset``
Return Values
-------------
``OPAL_SUCCESS``
data from nvram to memory ``buffer`` copied successfully
``OPAL_PARAMETER``
a parameter ``offset`` or ``size`` was incorrect
``OPAL_HARDWARE``
either nvram is not initialized or permanent error related to nvram hardware.
OPAL_WRITE_NVRAM
================
::
#define OPAL_WRITE_NVRAM 8
``OPAL_WRITE_NVRAM`` call requests OPAL to write the data to actual system NVRAM memory
from memory ``buffer`` at ``offset``, of size ``size``
Parameters
----------
::
uint64_t buffer
uint64_t size
uint64_t offset
``buffer``
data from ``buffer`` will be copied to nvram
``size``
the data of size ``size`` will be copied
``offset``
the data will be copied to address which is equal to base ``nvram_image`` plus ``offset``
Return Values
-------------
``OPAL_SUCCESS``
data from memory ``buffer`` to actual nvram_image copied successfully
``OPAL_PARAMETER``
a parameter ``offset`` or ``size`` was incorrect
``OPAL_HARDWARE``
either nvram is not initialized or permanent error related to nvram hardware.
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