Tribblix: 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.

These DDI functions can be called from a high-interrupt context for
the ISA bus and, under certain conditions, for the PCI bus. See
sysbus(5), isa(5) and pci(5) for details.

CONTEXT

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

ATTRIBUTES