| // SPDX-License-Identifier: GPL-2.0 |
| #include <linux/module.h> |
| #include <asm/io.h> |
| #include <arch/cache.h> |
| #include <arch/hwregs/dma.h> |
| |
| /* This file is used to workaround a cache bug, Guinness TR 106. */ |
| |
| inline void flush_dma_descr(struct dma_descr_data *descr, int flush_buf) |
| { |
| /* Flush descriptor to make sure we get correct in_eop and after. */ |
| asm volatile ("ftagd [%0]" :: "r" (descr)); |
| /* Flush buffer pointed out by descriptor. */ |
| if (flush_buf) |
| cris_flush_cache_range(phys_to_virt((unsigned)descr->buf), |
| (unsigned)(descr->after - descr->buf)); |
| } |
| EXPORT_SYMBOL(flush_dma_descr); |
| |
| void flush_dma_list(struct dma_descr_data *descr) |
| { |
| while (1) { |
| flush_dma_descr(descr, 1); |
| if (descr->eol) |
| break; |
| descr = phys_to_virt((unsigned)descr->next); |
| } |
| } |
| EXPORT_SYMBOL(flush_dma_list); |
| |
| /* From cacheflush.S */ |
| EXPORT_SYMBOL(cris_flush_cache); |
| /* From cacheflush.S */ |
| EXPORT_SYMBOL(cris_flush_cache_range); |
