LXR linux/arch/cris/include/arch-v10/arch/svinto.h

   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