include/asm-cris/arch-v10/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 extern void prepare_rx_descriptor(struct etrax_dma_descr *desc);
  62 extern void flush_etrax_cache(void);
  63
  64 #endif