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57c230a8 JN |
1 | #include <linux/module.h> |
2 | #include <asm/io.h> | |
556dcee7 JN |
3 | #include <arch/cache.h> |
4 | #include <arch/hwregs/dma.h> | |
57c230a8 JN |
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); |