ddi_device_zero(9f) [opensolaris man page]
ddi_device_zero(9F) Kernel Functions for Drivers ddi_device_zero(9F) NAME
ddi_device_zero - zero fill the device SYNOPSIS
#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); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI). PARAMETERS
handle The data access handle returned from setup calls, such as ddi_regs_map_setup(9F). dev_addr Beginning of the device address. bytecount Number of bytes to zero. dev_advcnt Number of dev_datasz units to advance on every access. dev_datasz The size of each data word. Possible values are defined as: 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_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. RETURN VALUES
ddi_device_zero() returns: DDI_SUCCESS Successfully zeroed the data. DDI_FAILURE The byte count is not a multiple of dev_datasz. CONTEXT
ddi_device_zero() 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 5.11 25 Sep 1996 ddi_device_zero(9F)
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ddi_device_zero(9F) Kernel Functions for Drivers ddi_device_zero(9F) NAME
ddi_device_zero - zero fill the device SYNOPSIS
#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); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI). PARAMETERS
handle The data access handle returned from setup calls, such as ddi_regs_map_setup(9F). dev_addr Beginning of the device address. bytecount Number of bytes to zero. dev_advcnt Number of dev_datasz units to advance on every access. dev_datasz The size of each data word. Possible values are defined as: "25">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_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. RETURN VALUES
ddi_device_zero() returns: DDI_SUCCESS Successfully zeroed the data. DDI_FAILURE The byte count is not a multiple of dev_datasz. CONTEXT
ddi_device_zero() 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 25 Sep 1996 ddi_device_zero(9F)