Linux Kernel  3.7.1
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svinto.h
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1 #ifndef _ASM_CRIS_SVINTO_H
2 #define _ASM_CRIS_SVINTO_H
3 
4 #include <arch/sv_addr_ag.h>
5 
6 extern unsigned int genconfig_shadow; /* defined and set in head.S */
7 
8 /* dma stuff */
9 
10 enum { /* 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 
30 typedef 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 */
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 
61 extern void prepare_rx_descriptor(struct etrax_dma_descr *desc);
62 extern void flush_etrax_cache(void);
63 
64 #endif