NAME

ddi_io_rep_getb, ddi_io_rep_getw, ddi_io_rep_getl − 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_getb(ddi_acc_handle_t handle, uchar_t ∗host_addr, int dev_port,

uint_t repcount);

void ddi_io_rep_getw(ddi_acc_handle_t handle, ushort_t ∗host_addr, int dev_port,

uint_t repcount);

void ddi_io_rep_getl(ddi_acc_handle_t handle, ulong_t ∗host_addr, int dev_port,

uint_t repcount);

INTERFACE LEVEL

Solaris DDI specific (Solaris DDI). 

ARGUMENTS

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

host_addr Base host address. 

dev_port The device port. 

repcount Number of data accesses to perform. 

DESCRIPTION

These routines generate multiple reads from the device port, dev_port, in I/O space. repcount data is copied from the device port, dev_port, to the host address, host_addr. For each input datum, the ddi_io_rep_getb(), ddi_io_rep_getw(), and ddi_io_rep_getl() functions read 8 bits, 16 bits, and 32 bits of data, respectively, from the device port.  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. 

SEE ALSO

ddi_io_getb(9F), ddi_io_putb(9F), ddi_io_rep_putb(9F), ddi_regs_map_setup(9F), ddi_regs_map_free(9F), ddi_device_acc_attr(9S)

NOTES

For drivers using these functions, it may not be easy to maintain a single source to support devices with multiple bus versions. For example, devices may offer I/O space in ISA bus (see isa(4)) but memory space only in PCI local bus. This is especially true in instruction set architectures such as x86 where accesses to the memory and I/O space are different. 

SunOS 5.5.1  —  Last change: 31 Oct 1994