DDI_REP_GET8(9F) Kernel Functions for Drivers DDI_REP_GET8(9F)

ddi_rep_get8, ddi_rep_get16, ddi_rep_get32, ddi_rep_get64, - read data from the mapped memory address, device register or allocated DMA memory address

#include <sys/ddi.h>
#include <sys/sunddi.h>
void ddi_rep_get8(ddi_acc_handle_t handle, uint8_t *host_addr,
     uint8_t *dev_addr, size_t repcount, uint_t flags);

void ddi_rep_get16(ddi_acc_handle_t handle, uint16_t *host_addr,
     uint16_t *dev_addr, size_t repcount, uint_t flags);

void ddi_rep_get32(ddi_acc_handle_t handle, uint32_t *host_addr,
     uint32_t *dev_addr, size_t repcount, uint_t flags);

void ddi_rep_get64(ddi_acc_handle_t handle, uint64_t *host_addr,
     uint64_t *dev_addr, size_t repcount, uint_t flags);

illumos DDI specific (illumos DDI). The ddi_rep_getb(), ddi_rep_getl(), ddi_rep_getll(), and ddi_rep_getw() functions are obsolete. The ddi_rep_get8() function replaces ddi_rep_getb(). The ddi_rep_get32() function replaces ddi_rep_getl(). The ddi_rep_get64() function replaces ddi_rep_getll(). The ddi_rep_get16() function replaces ddi_rep_getw().

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.


Device address flags:


Automatically increment the device address, dev_addr, during data accesses.


Do not advance the device address, dev_addr, during data accesses.

These routines generate multiple reads from the mapped memory or device register. repcount data is copied from the device address, dev_addr, to the host address, host_addr. For each input datum, the ddi_rep_get8(), ddi_rep_get16(), ddi_rep_get32(), and ddi_rep_get64() functions read 8 bits, 16 bits, 32 bits, and 64 bits of data, respectively, from the device address, dev_addr. dev_addr and 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.

When the flags argument is set to DDI_DEV_AUTOINCR, these function treat the device address, dev_addr, as a memory buffer location on the device and increment its address on the next input datum. However, when the flags argument is to DDI_DEV_NO_AUTOINCR, the same device address will be used for every datum access. For example, this flag may be useful when reading from a data register.

These functions return the value read from the mapped address.

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

See attributes(5) for descriptions of the following attributes:

Interface Stability Committed

ddi_get8(9F), ddi_put8(9F), ddi_regs_map_free(9F), ddi_regs_map_setup(9F), ddi_rep_put8(9F)
November 1, 2005 OmniOS