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 65