Size of a directory Post: 29120

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LEARN ABOUT SUNOS

ddi_device_copy

ddi_device_copy(9F)					   Kernel Functions for Drivers 				       ddi_device_copy(9F)

NAME

       ddi_device_copy - copy data from one device register to another device register

SYNOPSIS

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

       int  ddi_device_copy(ddi_acc_handle_t  src_handle,  caddr_t  src_addr, ssize_t src_advcnt, ddi_acc_handle_t dest_handle, caddr_t dest_addr,
       ssize_t dest_advcnt, size_t bytecount, uint_t dev_datasz);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

PARAMETERS

       src_handle      The data access handle of the source device.

       src_addr        Base data source address.

       src_advcnt      Number of  dev_datasz units to advance on every access.

       dest_handle     The data access handle of the destination device.

       dest_addr       Base data destination address.

       dest_advcnt     Number of  dev_datasz units to advance on every access.

       bytecount       Number of bytes to transfer.

       dev_datasz      The size of each data word. Possible values are defined as: "15">DDI_DATA_SZ01_ACC 1 byte data size

		       DDI_DATA_SZ02_ACC       2 bytes data size

		       DDI_DATA_SZ04_ACC       4 bytes data size

		       DDI_DATA_SZ08_ACC       8 bytes data size

DESCRIPTION

       ddi_device_copy() copies  bytecount bytes from the source  address,  src_addr, to the  destination  address,   dest_addr.   The	attributes
       encoded	in  the  access handles, src_handle and  dest_handle, govern how data is actually copied from the  source to the destination. Only
       matching data sizes between the source and destination are supported.

       Data will automatically be translated to maintain a consistent  view between the source and the destination. The translation  may   involve
       byte-swapping if the source and the destination devices	have incompatible endian characteristics.

       The  src_advcnt and  dest_advcnt arguments specifies the number of  dev_datasz units to advance with each access to the device addresses. A
       value of  0 will use the same source and destination device address  on every access. A positive value increments the corresponding  device
       address by certain number of data size units in the next access.  On the other hand, a negative value decrements the device address.

       The dev_datasz argument determines the size of the data word on each access. The data size must be the same between the source and destina-
       tion.

RETURN VALUES

       ddi_device_copy() returns:

       DDI_SUCCESS	       Successfully transferred the data.

       DDI_FAILURE	       The byte count is not a multiple dev_datasz.

CONTEXT

       ddi_device_copy() can be called from user, kernel, or interrupt context.

SEE ALSO

       ddi_regs_map_free(9F), ddi_regs_map_setup(9F)

       Writing Device Drivers

SunOS 5.10							    15 Nov 1996 					       ddi_device_copy(9F)

10 More Discussions You Might Find Interesting

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size of a directory?

Discussion started by: yls177

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size of a directory

Discussion started by: collins

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size of directory with ls -l

Discussion started by: pascalbout

4. UNIX for Dummies Questions & Answers

directory size with ls -l

Discussion started by: JamesByars