ddi_mem_getb(9F)

NAME

ddi_mem_getb, ddi_mem_getw, ddi_mem_getl, ddi_mem_getll − read data from mapped device in the memory space or allocated DMA memory

SYNOPSIS

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

uchar_t ddi_mem_getb(ddi_acc_handle_t handle, uchar_t ∗dev_addr);

ushort_t ddi_mem_getw(ddi_acc_handle_t handle, ushort_t ∗dev_addr);

ulong_t ddi_mem_getl(ddi_acc_handle_t handle, ulong_t ∗dev_addr);

unsigned long long ddi_mem_getll(ddi_acc_handle_t handle,

unsigned long long ∗dev_addr);

ARGUMENTS

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

dev_addr Base device address.

INTERFACE LEVEL

Solaris DDI specific (Solaris DDI).

DESCRIPTION

These routines generate a read of various sizes from memory space or allocated DMA memory. The ddi_mem_getb(), ddi_mem_getw(), ddi_mem_getl(), and ddi_mem_getll() functions read 8 bits, 16 bits, 32 bits and 64 bits of data, respectively, from the device address, dev_addr, in memory space.

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.

CONTEXT

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

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