ddi_poke32(9F)

NAME | SYNOPSIS | INTERFACE LEVEL | PARAMETERS | DESCRIPTION | RETURN VALUES | CONTEXT | SEE ALSO | NOTES

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>

intddi_poke8(dev_info_t *dip, int8_t *addr, int8_t value);
intddi_poke16(dev_info_t *dip, int16_t *addr, int16_t value);
intddi_poke32(dev_info_t *dip, int32_t *addr, int32_t value);
intddi_poke64(dev_info_t *dip, int64_t *addr, int64_t value);

INTERFACE LEVEL

Solaris DDI specific (Solaris DDI).

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 or interrupt 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

SunOS 5.8  Last Revised 20 Nov 1996

NAME | SYNOPSIS | INTERFACE LEVEL | PARAMETERS | DESCRIPTION | RETURN VALUES | CONTEXT | SEE ALSO | NOTES