File: /usr/src/linux/include/asm-cris/svinto.h

1     #ifndef _ASM_CRIS_SVINTO_H
2     #define _ASM_CRIS_SVINTO_H
3     
4     #include "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 */
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     
61     #endif
62