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Copyright (c) 2006, Sun Microsystems, Inc. All Rights Reserved
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
addr
value
DDI_FAILURE
Copyright (c) 2006, Sun Microsystems, Inc. All Rights Reserved
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
DDI_POKE 9F "Jan 16, 2006"
NAME
ddi_poke, ddi_poke8, ddi_poke16, ddi_poke32, ddi_poke64
- 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
illumos DDI specific (illumos 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.
Virtual address of the location to be written to.
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.
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