ddi_rep_get8(9F) Kernel Functions for Drivers ddi_rep_get8(9F)NAME
ddi_rep_get8, ddi_rep_get16, ddi_rep_get32, ddi_rep_get64,
ddi_rep_getw, ddi_rep_getl, ddi_rep_getll, ddi_rep_getb - read data
from the mapped memory address, device register or allocated DMA memory
address
SYNOPSIS
#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);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
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.
flags Device address flags:
DDI_DEV_AUTOINCR
Automatically increment the device address,
dev_addr, during data accesses.
DDI_DEV_NO_AUTOINCR
Do not advance the device address, dev_addr, dur‐
ing data accesses.
DESCRIPTION
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, respec‐
tively, 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 char‐
acteristics.
When the flags argument is set to DDI_DEV_AUTOINCR, these functions
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.
RETURN VALUES
These functions return the value read from the mapped address.
CONTEXT
These functions can be called from user, kernel, or interrupt context.
SEE ALSOddi_get8(9F), ddi_put8(9F), ddi_regs_map_free(9F), ddi_regs_map_set‐
up(9F), ddi_rep_put8(9F)NOTES
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:
┌─────────────────────────────┬─────────────────────────────┐
│ Previous Name │ New Name │
│ddi_rep_getb │ddi_rep_get8 │
│ddi_rep_getw │ddi_rep_get16 │
│ddi_rep_getl │ddi_rep_get32 │
│ddi_rep_getll │ddi_rep_get64 │
└─────────────────────────────┴─────────────────────────────┘
SunOS 5.10 10 Aug 1996 ddi_rep_get8(9F)