Hi there,
are threre any structs for IDMA in the recent kernel sources?
I think of something similar to
I am looking for a "IDMA Buffer Descriptor" similar to
/* Buffer descriptors used by many of the CPM protocols.
*/
typedef struct cpm_buf_desc {
ushort cbd_sc; /* Status and Control */
ushort cbd_datlen; /* Data length in buffer */
uint cbd_bufaddr; /* Buffer address in host memory */
} cbd_t;
I need a way to access the IDMA's parameter RAM, which should be located
at IDMA1 base = IMMR+0x3cc0.
Is there a struct to access the "DMA Channel Mode Register (DCMR)" at
IDMA1 + 0x02?
I know Greg Johnson <gjohnson at research.canon.com.au> proposed some stuff
last year. But they never made it into the linuxppc_2_4_devel, did they?
I could think of something like
/* Buffer descriptors used by IDMA
*/
typedef struct idma_buf_desc {
ushort ibd_sc; /* Status and Control */
unchar ibd_dfcr; /* destination function code register,
s.20.3.4.1*/
unchar ibd_sfcr; /* source function code register */
uint ibd_buflen; /* "number of bytes to transfer" */
uint ibd_srcbuf; /* "points to the beginning of the source
buffer" */
uint ibd_destbuf; /* "points to the beginning of the destination
buffer" */
} ibd_t;
TIA.
Cheers,
Steven
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