1#ifndef _ASM_CRIS_SVINTO_H
2#define _ASM_CRIS_SVINTO_H
3
4#include "sv_addr_ag.h"
5
6extern unsigned int genconfig_shadow; /* defined and set in head.S */
7
8/* dma stuff */
9
10enum {                          /* Available in:  */
11	d_eol      = (1 << 0),  /* flags          */
12	d_eop      = (1 << 1),  /* flags & status */
13	d_wait     = (1 << 2),  /* flags          */
14	d_int      = (1 << 3),  /* flags          */
15	d_txerr    = (1 << 4),  /* flags          */
16	d_stop     = (1 << 4),  /*         status */
17	d_ecp      = (1 << 4),  /* flags & status */
18	d_pri      = (1 << 5),  /* flags & status */
19	d_alignerr = (1 << 6),  /*         status */
20	d_crcerr   = (1 << 7)   /*         status */
21};
22
23/* Do remember that DMA does not go through the MMU and needs
24 * a real physical address, not an address virtually mapped or
25 * paged. Therefore the buf/next ptrs below are unsigned long instead
26 * of void * to give a warning if you try to put a pointer directly
27 * to them instead of going through virt_to_phys/phys_to_virt.
28 */
29
30typedef struct etrax_dma_descr {
31	unsigned short sw_len;                /* 0-1 */
32	unsigned short ctrl;                  /* 2-3 */
33	unsigned long  next;                  /* 4-7 */
34	unsigned long  buf;                   /* 8-11 */
35	unsigned short hw_len;                /* 12-13 */
36	unsigned char  status;                /* 14 */
37	unsigned char  fifo_len;              /* 15 */
38} etrax_dma_descr;
39
40
41/* Use this for constant numbers only */
42#define RESET_DMA_NUM( n ) \
43  *R_DMA_CH##n##_CMD = IO_STATE( R_DMA_CH0_CMD, cmd, reset )
44
45/* Use this for constant numbers or symbols,
46 * having two macros makes it possible to use constant expressions.
47 */
48#define RESET_DMA( n ) RESET_DMA_NUM( n )
49
50
51/* Use this for constant numbers only */
52#define WAIT_DMA_NUM( n ) \
53  while( (*R_DMA_CH##n##_CMD & IO_MASK( R_DMA_CH0_CMD, cmd )) != \
54         IO_STATE( R_DMA_CH0_CMD, cmd, hold ) )
55
56/* Use this for constant numbers or symbols
57 * having two macros makes it possible to use constant expressions.
58 */
59#define WAIT_DMA( n ) WAIT_DMA_NUM( n )
60
61extern void prepare_rx_descriptor(struct etrax_dma_descr *desc);
62extern void flush_etrax_cache(void);
63
64#endif
65