mvxpsec_descriptor
ndh = (PAGE_SIZE / sizeof(struct mvxpsec_descriptor))
sizeof(struct mvxpsec_descriptor);
pa_off += sizeof(struct mvxpsec_descriptor);
struct mvxpsec_descriptor *d =
(struct mvxpsec_descriptor *)dh->_desc;
struct mvxpsec_descriptor *desc;
desc = (struct mvxpsec_descriptor *)dh->_desc;
((struct mvxpsec_descriptor*)dh1->_desc)->tdma_nxt = dh2->phys_addr;
((struct mvxpsec_descriptor*)dh->_desc)->tdma_nxt = 0;
(x)->off, sizeof(struct mvxpsec_descriptor), (f)); \