projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 6f52b16c | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| 1da177e4 LT |
2 | #ifndef _ASM_CRIS_SVINTO_H |
| 3 | #define _ASM_CRIS_SVINTO_H | |
| 4 | ||
| a1ce3928 | 5 | #include <arch/sv_addr_ag.h> |
| 1da177e4 LT |
6 | |
| 7 | extern unsigned int genconfig_shadow; /* defined and set in head.S */ | |
| 8 | ||
| 9 | /* dma stuff */ | |
| 10 | ||
| 11 | enum { /* Available in: */ | |
| 12 | d_eol = (1 << 0), /* flags */ | |
| 13 | d_eop = (1 << 1), /* flags & status */ | |
| 14 | d_wait = (1 << 2), /* flags */ | |
| 15 | d_int = (1 << 3), /* flags */ | |
| 16 | d_txerr = (1 << 4), /* flags */ | |
| 17 | d_stop = (1 << 4), /* status */ | |
| 18 | d_ecp = (1 << 4), /* flags & status */ | |
| 19 | d_pri = (1 << 5), /* flags & status */ | |
| 20 | d_alignerr = (1 << 6), /* status */ | |
| 21 | d_crcerr = (1 << 7) /* status */ | |
| 22 | }; | |
| 23 | ||
| 24 | /* Do remember that DMA does not go through the MMU and needs | |
| 25 | * a real physical address, not an address virtually mapped or | |
| 26 | * paged. Therefore the buf/next ptrs below are unsigned long instead | |
| 27 | * of void * to give a warning if you try to put a pointer directly | |
| 28 | * to them instead of going through virt_to_phys/phys_to_virt. | |
| 29 | */ | |
| 30 | ||
| 31 | typedef struct etrax_dma_descr { | |
| 32 | unsigned short sw_len; /* 0-1 */ | |
| 33 | unsigned short ctrl; /* 2-3 */ | |
| 34 | unsigned long next; /* 4-7 */ | |
| 35 | unsigned long buf; /* 8-11 */ | |
| 36 | unsigned short hw_len; /* 12-13 */ | |
| 37 | unsigned char status; /* 14 */ | |
| 38 | unsigned char fifo_len; /* 15 */ | |
| 39 | } etrax_dma_descr; | |
| 40 | ||
| 41 | ||
| 42 | /* Use this for constant numbers only */ | |
| 43 | #define RESET_DMA_NUM( n ) \ | |
| 44 | *R_DMA_CH##n##_CMD = IO_STATE( R_DMA_CH0_CMD, cmd, reset ) | |
| 45 | ||
| 46 | /* Use this for constant numbers or symbols, | |
| 47 | * having two macros makes it possible to use constant expressions. | |
| 48 | */ | |
| 49 | #define RESET_DMA( n ) RESET_DMA_NUM( n ) | |
| 50 | ||
| 51 | ||
| 52 | /* Use this for constant numbers only */ | |
| 53 | #define WAIT_DMA_NUM( n ) \ | |
| 54 | while( (*R_DMA_CH##n##_CMD & IO_MASK( R_DMA_CH0_CMD, cmd )) != \ | |
| 55 | IO_STATE( R_DMA_CH0_CMD, cmd, hold ) ) | |
| 56 | ||
| 57 | /* Use this for constant numbers or symbols | |
| 58 | * having two macros makes it possible to use constant expressions. | |
| 59 | */ | |
| 60 | #define WAIT_DMA( n ) WAIT_DMA_NUM( n ) | |
| 61 | ||
| 62 | extern void prepare_rx_descriptor(struct etrax_dma_descr *desc); | |
| 63 | extern void flush_etrax_cache(void); | |
| 64 | ||
| 65 | #endif |