diff options
Diffstat (limited to 'include/asm-cris/svinto.h')
| -rw-r--r-- | include/asm-cris/svinto.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/asm-cris/svinto.h b/include/asm-cris/svinto.h new file mode 100644 index 000000000..444bc3ca5 --- /dev/null +++ b/include/asm-cris/svinto.h @@ -0,0 +1,46 @@ +#ifndef _ASM_CRIS_SVINTO_H +#define _ASM_CRIS_SVINTO_H + +#include "sv_addr_ag.h" + +extern unsigned int genconfig_shadow; /* defined and set in head.S */ + +/* dma stuff */ + +enum { /* Available in: */ + d_eol = (1 << 0), /* flags */ + d_eop = (1 << 1), /* flags & status */ + d_wait = (1 << 2), /* flags */ + d_int = (1 << 3), /* flags */ + d_txerr = (1 << 4), /* flags */ + d_stop = (1 << 4), /* status */ + d_ecp = (1 << 4), /* flags & status */ + d_pri = (1 << 5), /* flags & status */ + d_alignerr = (1 << 6), /* status */ + d_crcerr = (1 << 7) /* status */ +}; + +/* Do remember that DMA does not go through the MMU and needs + * a real physical address, not an address virtually mapped or + * paged. Therefore the buf/next ptrs below are unsigned long instead + * of void * to give a warning if you try to put a pointer directly + * to them instead of going through virt_to_phys/phys_to_virt. + */ + +typedef struct etrax_dma_descr { + unsigned short sw_len; /* 0-1 */ + unsigned short ctrl; /* 2-3 */ + unsigned long next; /* 4-7 */ + unsigned long buf; /* 8-11 */ + unsigned short hw_len; /* 12-13 */ + unsigned short status; /* 14-15 */ +} etrax_dma_descr; + +#define RESET_DMA( n ) \ + *R_DMA_CH##n##_CMD = IO_STATE( R_DMA_CH0_CMD, cmd, reset ) + +#define WAIT_DMA( n ) \ + while( (*R_DMA_CH##n##_CMD & IO_MASK( R_DMA_CH0_CMD, cmd )) != \ + IO_STATE( R_DMA_CH0_CMD, cmd, hold ) ) + +#endif |