NAME

ddi_rep_getb, ddi_rep_getw, ddi_rep_getl, ddi_rep_getll − 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_getb(ddi_acc_handle_t handle, uchar_t ∗host_addr, uchar_t ∗dev_addr,

uint_t repcount, ulong_t flags);

void ddi_rep_getw(ddi_acc_handle_t handle, ushort_t ∗host_addr, ushort_t ∗dev_addr,

uint_t repcount, ulong_t flags);

void ddi_rep_getl(ddi_acc_handle_t handle, ulong_t ∗host_addr, ulong_t ∗dev_addr,

uint_t repcount, ulong_t flags);

void ddi_rep_getll(ddi_acc_handle_t handle, unsigned long long ∗host_addr,

unsigned long long ∗dev_addr, uint_t repcount, ulong_t flags);

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_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_getb(), ddi_rep_getw(), ddi_rep_getl(), and ddi_rep_getll() 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_getb(9F), ddi_putb(9F), ddi_rep_putb(9F), ddi_regs_map_setup(9F), ddi_regs_map_free(9F)

SunOS 5.5/x86  —  Last change: 10 Jan 1995