DDI_GET8(9F) Kernel Functions for Drivers DDI_GET8(9F)


NAME


ddi_get8, ddi_get16, ddi_get32, ddi_get64, ddi_getb, ddi_getw, ddi_getl,
ddi_getll - read data from the mapped memory address, device register or
allocated DMA memory address

SYNOPSIS


#include <sys/ddi.h>
#include <sys/sunddi.h>


uint8_t ddi_get8(ddi_acc_handle_t handle, uint8_t *dev_addr);


uint16_t ddi_get16(ddi_acc_handle_t handle, uint16_t *dev_addr);


uint32_t ddi_get32(ddi_acc_handle_t handle, uint32_t *dev_addr);


uint64_t ddi_get64(ddi_acc_handle_t handle, uint64_t *dev_addr);


INTERFACE LEVEL


Solaris DDI specific (Solaris DDI). The ddi_getb(), ddi_getl(),
ddi_getll(), and ddi_getw() functions are obsolete. The ddi_get8()
function replaces ddi_getb(). The ddi_get32() function replaces
ddi_getl(). The ddi_get64() function replaces ddi_getll(). The
ddi_get16() function replaces ddi_getw().

PARAMETERS


handle
The data access handle returned from setup calls, such as
ddi_regs_map_setup(9F).


dev_addr
Base device address.


DESCRIPTION


The ddi_get8(), ddi_get16(), ddi_get32(), and ddi_get64() functions read
8 bits, 16 bits, 32 bits and 64 bits of data, respectively, from the
device address, dev_addr.


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.


For certain bus types, you can call these DDI functions from a high-
interrupt context. These types include ISA and SBus buses. See sysbus(4),
isa(4), and sbus(4) for details. For the PCI bus, you can, under certain
conditions, call these DDI functions from a high-interrupt context. See
pci(4).

RETURN VALUES


These functions return the value read from the mapped address.

CONTEXT


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

ATTRIBUTES


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


+--------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------------------+
|Interface Stability | ddi_getb(), ddi_getl(), |
| | ddi_getll(), and ddi_getw() |
| | are Obsolete; ddi_get8(), |
| | ddi_get16(), ddi_get32(), |
| | ddi_get64() are Committed |
+--------------------+-----------------------------+

SEE ALSO


ddi_put8(9F), ddi_regs_map_free(9F), ddi_regs_map_setup(9F),
ddi_rep_get8(9F), ddi_rep_put8(9F)


November 1, 2005 DDI_GET8(9F)