Name | Synopsis | Interface Level | Parameters | Description | Return Values | Context | See Also
#include <sys/ddi.h> #include <sys/sunddi.h> int ddi_device_zero(ddi_acc_handle_t handle, caddr_t dev_addr, size_t bytecount, ssize_t dev_advcnt, uint_t dev_datasz);
Solaris DDI specific (Solaris DDI).
The data access handle returned from setup calls, such as ddi_regs_map_setup(9F).
Beginning of the device address.
Number of bytes to zero.
Number of dev_datasz units to advance on every access.
The size of each data word. Possible values are defined as:
1 byte data size
2 bytes data size
4 bytes data size
8 bytes data size
ddi_device_zero() function fills the given, bytecount, number of byte of zeroes to the device register or memory.
The dev_advcnt argument determines the value of the device address, dev_addr, on each access. A value of 0 will use the same device address, dev_addr, on every access. A positive value increments the device address in the next access while a negative value decrements the address. The device address is incremented and decremented in dev_datasz units.
The dev_datasz argument determines the size of data word on each access.
ddi_device_zero() returns:
Successfully zeroed the data.
The byte count is not a multiple of dev_datasz.
ddi_device_zero() can be called from user, kernel, or interrupt context.
Name | Synopsis | Interface Level | Parameters | Description | Return Values | Context | See Also