DDI_IO_GET8(9F) Kernel Functions for Drivers DDI_IO_GET8(9F)

NAME


ddi_io_get8, ddi_io_get16, ddi_io_get32 - read data from the mapped
device register in I/O space

SYNOPSIS


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


uint8_t ddi_io_get8(ddi_acc_handle_t handle, uint8_t *dev_addr);


uint16_t ddi_io_get16(ddi_acc_handle_t handle, uint16_t *dev_addr);


uint32_t ddi_io_get32(ddi_acc_handle_t handle, uint32_t *dev_addr);


INTERFACE LEVEL


illumos DDI specific (illumos DDI). The ddi_io_get8(), ddi_io_get16(),
ddi_io_get32(), ddi_io_getb(), ddi_io_getl(), and ddi_io_getw() functions
are obsolete. The ddi_get8(9F) function replaces ddi_io_get8(). The
ddi_get16(9F) function replaces ddi_io_get16(). The ddi_get32(9F)
function replaces ddi_io_get32().


PARAMETERS


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


dev_addr
Device address.


DESCRIPTION


These routines generate a read of various sizes from the device address,
dev_addr, in I/O space. The ddi_io_get8(), ddi_io_get16(), and
ddi_io_get32() functions read 8 bits, 16 bits, and 32 bits of data,
respectively, from 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


See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Obsolete |
+--------------------+-----------------+

SEE ALSO


isa(5), ddi_get16(9F), ddi_get32(9F), ddi_get8(9F), ddi_io_put8(9F),
ddi_io_rep_get8(9F), ddi_io_rep_put8(9F), ddi_regs_map_free(9F),
ddi_regs_map_setup(9F), ddi_device_acc_attr(9S)

illumos November 1, 2005 DDI_IO_GET8(9F)