illumos: manual page: ddi_io_rep

DDI_IO_REP_GET8(9F) Kernel Functions for Drivers DDI_IO_REP_GET8(9F)

NAME

ddi_io_rep_get8, ddi_io_rep_get16, ddi_io_rep_get32
- read multiple data from the mapped device register in I/O space

SYNOPSIS

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

void ddi_io_rep_get8(ddi_acc_handle_t handle, uint8_t *host_addr,
uint8_t *dev_addr, size_t repcount);

void ddi_io_rep_get16(ddi_acc_handle_t handle, uint16_t *host_addr,
uint16_t *dev_addr, size_t repcount);

void ddi_io_rep_get32(ddi_acc_handle_t handle, uint32_t *host_addr,
uint32_t *dev_addr, size_t repcount);

INTERFACE LEVEL

illumos DDI specific (illumos DDI). The ddi_io_rep_get8(),
ddi_io_rep_get16(), ddi_io_rep_get32(), ddi_io_rep_getb(),
ddi_io_rep_getl(), and ddi_io_rep_getw() functions are obsolete. The
ddi_rep_get8(9F) function replaces ddi_io_rep_get8(). The
ddi_rep_get16(9F) function replaces ddi_io_rep_get16(). The
ddi_rep_get32(9F) function replaces ddi_io_rep_get32().

PARAMETERS

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

host_addr
Base host address.

dev_addr
Base device address.

repcount
Number of data accesses to perform.

DESCRIPTION

These routines generate multiple reads from the device address, dev_addr,
in I/O space. repcount data is copied from the device address, dev_addr,
to the host address, host_addr. For each input datum, the
ddi_io_rep_get8(), ddi_io_rep_get16(), and ddi_io_rep_get32() functions
read 8 bits, 16 bits, and 32 bits of data, respectively, from the device
address. host_addr must be aligned to the datum boundary described by the
function.

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