write byte to board's NVRAM extension information
int cm_write_devconfig8(rm_key_t key, size_t offset, const uchar_t *buf)
is used to write a single byte to the
NVRAM extension information associated with a selected
The extension information is specific to the bus
type of the board and exactly what information is written is determined
by the bus driver (for example, the MCA bus driver).
Drivers should not use this routine to write standard board parameters
Rather, such parameters should be stored via
cm_write_devconfig8 can be used
by MCA drivers to directly write
the POS registers.
Resource manager key selecting a particular board instance.
Offset from the beginning of the board's device configuration space
to start writing data.
Buffer containing data to be written.
cm_write_devconfig8 returns 0 for success.
The following errnos are returned for failure:
if rm_key is invalid,
buf is NULL or the write fails.
if the board is installed on an ISA bus
or the bus does not
provide the specified level of granularity.
The caller must not have
a resource manager transaction pending
when this function is called.
function supports all levels of granularity,
this interface is limited to
those "inherent" on the system
(that is, there are bios calls to support them directly).
Context and synchronization
7.1, 7.1mp, 8, 8mp
Differences between versions
In DDI versions 7.1 and 7.1mp,
the offset argument is cast
as size_t rather than an off_t.
When porting drivers from earlier DDI versions,
it is not necessary to modify the type
of the offset argument.
``Autoconfiguration'' in HDK Technical Reference
19 June 2005
© 2005 The SCO Group, Inc. All rights reserved.
OpenServer 6 and UnixWare (SVR5) HDK - June 2005