man/man9f/ddi_poke.9f

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 DDI_POKE 9F "Jan 16, 2006"
 NAME
ddi_poke, ddi_poke8, ddi_poke16, ddi_poke32, ddi_poke64, ddi_pokec, ddi_pokes,
ddi_pokel, ddi_poked - write a value to a location
 SYNOPSIS

#include <sys/ddi.h>
#include <sys/sunddi.h>


int ddi_poke8(dev_info_t *dip, int8_t *addr, int8_t value);


int ddi_poke16(dev_info_t *dip, int16_t *addr, int16_t value);


int ddi_poke32(dev_info_t *dip, int32_t *addr, int32_t value);


int ddi_poke64(dev_info_t *dip, int64_t *addr, int64_t value);


 INTERFACE LEVEL

Solaris DDI specific (Solaris DDI). The ddi_pokec(), ddi_pokes(),
ddi_pokel(), and ddi_poked() functions are obsolete. Use,
respectively, ddi_poke8(), ddi_poke16(), ddi_poke32(), and
ddi_poke64(), instead.
 PARAMETERS
dip

A pointer to the device's dev_info structure.


addr

Virtual address of the location to be written to.


value

Value to be written to the location.


 DESCRIPTION

These routines cautiously attempt to write a value to a specified virtual
address, using the parent nexus driver to assist in the process where
necessary.

If the address is not valid, or the value cannot be written without an error
occurring, an error code is returned.

These routines are most useful when first trying to establish the presence of a
given device on the system in a driver's probe(9E) or attach(9E)
routines.

On multiprocessing machines these routines can be extremely heavy-weight, so
use the ddi_peek(9F) routines instead if possible.
 RETURN VALUES
DDI_SUCCESS

The value was successfully written to the given virtual address.


DDI_FAILURE

An error occurred while trying to write to the location.


 CONTEXT

These functions can be called from user, interrupt, or kernel context.
 SEE ALSO

attach(9E), probe(9E), ddi_peek(9F)

Writing Device Drivers
 NOTES

The functions described in this manual page previously used symbolic names
which specified their data access size; the function names have been changed so
they now specify a fixed-width data size. See the following table for the new
name equivalents:


Previous Name New Name
ddi_pokec ddi_poke8
ddi_pokes ddi_poke16
ddi_pokel ddi_poke32
ddi_poked ddi_poke64