05-16-2002
Difference DSK RDSK
COuld you please telle me the diffrence between DSK and RDSK with exemple if possible...
Thanks a lot in advance.
Regards.
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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)