Copyright (c) 1996, 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]
#include <sys/pccard.h> int32_t csx_DupHandle(acc_handle_t handle1, acc_handle_t *handle2, uint32_t flags);
Solaris DDI Specific (Solaris DDI)
handle1
The access handle returned from csx_RequestIO(9F) or csx_RequestWindow(9F) that is to be duplicated.
handle2
A pointer to the newly-created duplicated data access handle.
flags
The access attributes that will be applied to the new handle.
This function duplicates the handle, handle1, into a new handle, handle2, that has the access attributes specified in the flags argument. Both the original handle and the new handle are active and can be used with the common access functions.
Both handles must be explicitly freed when they are no longer necessary.
The flags argument is bit-mapped. The following bits are defined:
WIN_ACC_NEVER_SWAP Host endian byte ordering WIN_ACC_BIG_ENDIAN Big endian byte ordering WIN_ACC_LITTLE_ENDIAN Little endian byte ordering WIN_ACC_STRICT_ORDER Program ordering references WIN_ACC_UNORDERED_OK May re-order references WIN_ACC_MERGING_OK Merge stores to consecutive locations WIN_ACC_LOADCACHING_OK May cache load operations WIN_ACC_STORECACHING_OK May cache store operations
WIN_ACC_BIG_ENDIAN and WIN_ACC_LITTLE_ENDIAN describe the endian characteristics of the device as big endian or little endian, respectively. Even though most of the devices will have the same endian characteristics as their busses, there are examples of devices with an I/O processor that has opposite endian characteristics of the busses. When WIN_ACC_BIG_ENDIAN or WIN_ACC_LITTLE_ENDIAN is set, byte swapping will automatically be performed by the system if the host machine and the device data formats have opposite endian characteristics. The implementation may take advantage of hardware platform byte swapping capabilities. When WIN_ACC_NEVER_SWAP is specified, byte swapping will not be invoked in the data access functions. The ability to specify the order in which the CPU will reference data is provided by the following flags bits. Only one of the following bits may be specified:
WIN_ACC_STRICT_ORDER
The data references must be issued by a CPU in program order. Strict ordering is the default behavior.
WIN_ACC_UNORDERED_OK
The CPU may re-order the data references. This includes all kinds of re-ordering (that is, a load followed by a store may be replaced by a store followed by a load).
WIN_ACC_MERGING_OK
The CPU may merge individual stores to consecutive locations. For example, the CPU may turn two consecutive byte stores into one halfword store. It may also batch individual loads. For example, the CPU may turn two consecutive byte loads into one halfword load. Setting this bit also implies re-ordering.
WIN_ACC_LOADCACHING_OK
The CPU may cache the data it fetches and reuse it until another store occurs. The default behavior is to fetch new data on every load. Setting this bit also implies merging and re-ordering.
WIN_ACC_STORECACHING_OK
The CPU may keep the data in the cache and push it to the device (perhaps with other data) at a later time. The default behavior is to push the data right away. Setting this bit also implies load caching, merging, and re-ordering.
These values are advisory, not mandatory. For example, data can be ordered without being merged or cached, even though a driver requests unordered, merged and cached together.
CS_SUCCESS
Successful operation.
CS_FAILURE
Error in flags argument or handle could not be duplicated for some reason.
CS_UNSUPPORTED_FUNCTION
No PCMCIA hardware installed.
This function may be called from user or kernel context.
csx_Get8(9F), csx_GetMappedAddr(9F), csx_Put8(9F), csx_RepGet8(9F), csx_RepPut8(9F), csx_RequestIO(9F), csx_RequestWindow(9F)