Tribblix: manual page: ddi_io

DDI_IO_PUT8(9F) Kernel Functions for Drivers DDI_IO_PUT8(9F)

NAME

ddi_io_put8, ddi_io_put16, ddi_io_put32 - write data to the mapped
device register in I/O space

SYNOPSIS

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

void ddi_io_put8(ddi_acc_handle_t handle, uint8_t *dev_addr,
uint8_t value);

void ddi_io_put16(ddi_acc_handle_t handle, uint16_t *dev_addr,
uint16_t value);

void ddi_io_put32(ddi_acc_handle_t handle, uint32_t *dev_addr,
uint32_t value);

INTERFACE LEVEL

illumos DDI specific (illumos DDI). The ddi_io_put8(),
ddi_io_put16(), ddi_io_put32(), ddi_io_putb(), ddi_io_putl(), and
ddi_io_putw() functions are obsolete. The ddi_put8(9F) function
replaces ddi_io_put8(). The ddi_put16(9F) function replaces
ddi_io_put16(). The ddi_put32(9F) function replaces ddi_io_put32().

PARAMETERS

handle
Data access handle returned from setup calls, such as
ddi_regs_map_setup(9F).

dev_addr
Base device address.

value
Data to be written to the device.

DESCRIPTION

These routines generate a write of various sizes to the device
address, dev_addr, in I/O space. The ddi_io_put8(), ddi_io_put16(),
and ddi_io_put32() functions write 8 bits, 16 bits, and 32 bits of
data, respectively, to the device address, dev_addr.

Each individual datum will automatically be translated to maintain a
consistent view between the host and the device based on the encoded
information in the data access handle. The translation may involve
byte-swapping if the host and the device have incompatible endian
characteristics.

CONTEXT

These functions can be called from user, kernel, or interrupt
context.

ATTRIBUTES