csx_DupHandle man page on SmartOS

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       csx_DupHandle - duplicate access handle

       #include <sys/pccard.h>

       int32_t csx_DupHandle(acc_handle_t handle1, acc_handle_t *handle2,
	    uint32_t flags);

       Solaris DDI Specific (Solaris DDI)

		   The	 access	 handle	 returned  from	 csx_RequestIO(9F)  or
		   csx_RequestWindow(9F) that is to be duplicated.

		   A pointer to the newly-created duplicated data access  han‐

		   The	access attributes that will be applied to the new han‐

       This function duplicates the handle, handle1, into a new	 handle,  han‐
       dle2,  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 neces‐

       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	 char‐
       acteristics of the device as big endian or little endian, respectively.
       Even though most of the devices will have the same endian  characteris‐
       tics as their busses, there are examples of devices with an I/O proces‐
       sor 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 implemen‐
       tation may take advantage of hardware platform byte swapping  capabili‐
       ties.   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:

				   The data references must be issued by a CPU
				   in  program	order.	Strict ordering is the
				   default behavior.

				   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).

				   The CPU may merge individual stores to con‐
				   secutive locations. For  example,  the  CPU
				   may	turn  two consecutive byte stores into
				   one halfword store. It may also batch indi‐
				   vidual loads. For example, the CPU may turn
				   two consecutive byte loads into  one	 half‐
				   word	 load.	Setting	 this bit also implies

				   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.

				   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	behav‐
				   ior is to push the data right away. Setting
				   this bit also implies load  caching,	 merg‐
				   ing, 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.

				   Successful operation.

				   Error in flags argument or handle could not
				   be duplicated for some reason.

				   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)

       PC Card 95 Standard, PCMCIA/JEIDA

				 Jul 19, 1996		     CSX_DUPHANDLE(9F)

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