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|man pages section 9: DDI and DKI Kernel Functions Oracle Solaris 10 1/13 Information Library|
- read multiple data from the mapped device register in I/O space
#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);
Solaris DDI specific (Solaris DDI).
The data access handle returned from setup calls, such as ddi_regs_map_setup(9F).
Base host address.
Base device address.
Number of data accesses to perform.
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.
These functions can be called from user, kernel, or interrupt context.
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.
The functions described in this manual page previously used symbolic names which specified their data access size; the function names have been changed so they now specify a fixed-width data size. See the following table for the new name equivalents: