| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | #include <linux/module.h> |
| 2 | #include <asm/io.h> |
| 3 | #include <arch/cache.h> |
| 4 | #include <arch/hwregs/dma.h> |
| 5 | |
| 6 | /* This file is used to workaround a cache bug, Guinness TR 106. */ |
| 7 | |
| 8 | inline void flush_dma_descr(struct dma_descr_data *descr, int flush_buf) |
| 9 | { |
| 10 | /* Flush descriptor to make sure we get correct in_eop and after. */ |
| 11 | asm volatile ("ftagd [%0]" :: "r" (descr)); |
| 12 | /* Flush buffer pointed out by descriptor. */ |
| 13 | if (flush_buf) |
| 14 | cris_flush_cache_range(phys_to_virt((unsigned)descr->buf), |
| 15 | (unsigned)(descr->after - descr->buf)); |
| 16 | } |
| 17 | EXPORT_SYMBOL(flush_dma_descr); |
| 18 | |
| 19 | void flush_dma_list(struct dma_descr_data *descr) |
| 20 | { |
| 21 | while (1) { |
| 22 | flush_dma_descr(descr, 1); |
| 23 | if (descr->eol) |
| 24 | break; |
| 25 | descr = phys_to_virt((unsigned)descr->next); |
| 26 | } |
| 27 | } |
| 28 | EXPORT_SYMBOL(flush_dma_list); |
| 29 | |
| 30 | /* From cacheflush.S */ |
| 31 | EXPORT_SYMBOL(cris_flush_cache); |
| 32 | /* From cacheflush.S */ |
| 33 | EXPORT_SYMBOL(cris_flush_cache_range); |