illumos: manual page: csx

CSX_GET8(9F) Kernel Functions for Drivers CSX_GET8(9F)

NAME

csx_Get8, csx_Get16, csx_Get32, csx_Get64 - read data from device address

SYNOPSIS

#include <sys/pccard.h>

uint8_t csx_Get8(acc_handle_t handle, uint32_t offset);

uint16_t csx_Get16(acc_handle_t handle, uint32_t offset);

uint32_t csx_Get32(acc_handle_t handle, uint32_t offset);

uint64_t csx_Get64(acc_handle_t handle, uint64_t offset);

INTERFACE LEVEL

illumos DDI Specific (illumos DDI)

PARAMETERS

handle
The access handle returned from csx_RequestIO(9F),
csx_RequestWindow(9F), or csx_DupHandle(9F).

offset
The offset in bytes from the base of the mapped resource.

DESCRIPTION

These functions generate a read of various sizes from the mapped memory
or device register.

The csx_Get8(), csx_Get16(), csx_Get32(), and csx_Get64() functions read
8 bits, 16 bits, 32 bits, and 64 bits of data, respectively, from the
device address represented by the handle, handle, at an offset in bytes
represented by the offset, offset.

Data that consists of more than one byte 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.

RETURN VALUES

These functions return the value read from the mapped address.

CONTEXT

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