ddi_dma_cookie(9S)
NAME
ddi_dma_cookie − DMA address cookie
SYNOPSIS
#include <sys/ddidmareq.h>
INTERFACE LEVEL
SPARC architecture specific (SPARC DDI).
DESCRIPTION
ddi_dma_cookie structure contains DMA address information required to program a DMA engine. It is filled in by a call to ddi_dma_htoc(9F) or ddi_dma_movwin(9F) when a driver wants to get device specific DMA transfer information out of a DMA handle or DMA window (see ddi_dma_setup(9F)).
STRUCTURE MEMBERS
| unsigned long | dmac_address; | /∗ unsigned 32 bit address ∗/ |
| u_int | dmac_size; | /∗ unsigned 32 bit size ∗/ |
| u_int | dmac_type; | /∗ bus specific type bits ∗/ |
dmac_address specifies an unsigned 32 bit address appropriate for programming the device’s DMA engine.
dmac_size describes the length of the transfer.
dmac_type contains bus specific type bits (if appropriate). For example, a device on a VME bus will have VME address modifier bits placed here.
SEE ALSO
sbus(4), vme(4), ddi_dma_coff(9F), ddi_dma_free(9F), ddi_dma_htoc(9F), ddi_dma_movwin(9F), ddi_dma_setup(9F)
SunOS 5.1 Writing Device Drivers
SunOS 5.2 — Last change: 13 Sep 1992