illumos: manual page: ddi

DDI_PUT8(9F) Kernel Functions for Drivers DDI_PUT8(9F)

NAME

ddi_put8, ddi_put16, ddi_put32, ddi_put64, - write data to the mapped
memory address, device register or allocated DMA memory address

SYNOPSIS

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

void ddi_put8(ddi_acc_handle_t handle, uint8_t *dev_addr,
uint8_t value);

void ddi_put16(ddi_acc_handle_t handle, uint16_t *dev_addr,
uint16_t value);

void ddi_put32(ddi_acc_handle_t handle, uint32_t *dev_addr,
uint32_t value);

void ddi_put64(ddi_acc_handle_t handle, uint64_t *dev_addr,
uint64_t value);

INTERFACE LEVEL

illumos DDI specific (illumos DDI). The ddi_putb(), ddi_putl(),
ddi_putll(), and ddi_putw() functions are obsolete. The ddi_put8()
function replaces ddi_putb(). The ddi_put32() function replaces
ddi_putl(). The ddi_put64() function replaces ddi_putll(). The
ddi_put16() function replaces ddi_putw().

PARAMETERS

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

value
The data to be written to the device.

dev_addr
Base device address.

DESCRIPTION

These routines generate a write of various sizes to the mapped memory or
device register. The ddi_put8(), ddi_put16(), ddi_put32(), and
ddi_put64() functions write 8 bits, 16 bits, 32 bits and 64 bits of data,
respectively, to 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(5), isa(5), and sbus(5) for details. For the PCI bus, you can,
under certain conditions, call these DDI functions from a high-interrupt
context. See pci(5).

CONTEXT

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

ATTRIBUTES