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
8inline 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}
17EXPORT_SYMBOL(flush_dma_descr);
18
19void 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}
28EXPORT_SYMBOL(flush_dma_list);
29
30/* From cacheflush.S */
31EXPORT_SYMBOL(cris_flush_cache);
32/* From cacheflush.S */
33EXPORT_SYMBOL(cris_flush_cache_range);
34