Content-type: text/html Man page of ddi_rep_get8

ddi_rep_get8

Section: Kernel Functions for Drivers (9F)
Updated: 10 Aug 1996
Index Return to Main Contents
 

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, during 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, 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 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 ALSO

ddi_get8(9F), ddi_put8(9F), ddi_regs_map_free(9F), ddi_regs_map_setup(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 NameNew Name
ddi_rep_getbddi_rep_get8
ddi_rep_getwddi_rep_get16
ddi_rep_getlddi_rep_get32
ddi_rep_getllddi_rep_get64


 

Index

NAME
SYNOPSIS
INTERFACE LEVEL
PARAMETERS
DESCRIPTION
RETURN VALUES
CONTEXT
SEE ALSO
NOTES

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Time: 02:39:37 GMT, October 02, 2010