[mirror_ubuntu-bionic-kernel.git] / arch / cris / arch-v32 / kernel / cache.c

// 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);
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
57c230a8 JN	2	#include <linux/module.h>
57c230a8 JN	3	#include <asm/io.h>
556dcee7 JN	4	#include <arch/cache.h>
556dcee7 JN	5	#include <arch/hwregs/dma.h>
57c230a8 JN	6
	7	/* This file is used to workaround a cache bug, Guinness TR 106. */
	8
	9	inline void flush_dma_descr(struct dma_descr_data *descr, int flush_buf)
	10	{
	11	/* Flush descriptor to make sure we get correct in_eop and after. */
	12	asm volatile ("ftagd [%0]" :: "r" (descr));
	13	/* Flush buffer pointed out by descriptor. */
	14	if (flush_buf)
	15	cris_flush_cache_range(phys_to_virt((unsigned)descr->buf),
	16	(unsigned)(descr->after - descr->buf));
	17	}
	18	EXPORT_SYMBOL(flush_dma_descr);
	19
	20	void flush_dma_list(struct dma_descr_data *descr)
	21	{
	22	while (1) {
	23	flush_dma_descr(descr, 1);
	24	if (descr->eol)
	25	break;
	26	descr = phys_to_virt((unsigned)descr->next);
	27	}
	28	}
	29	EXPORT_SYMBOL(flush_dma_list);
	30
	31	/* From cacheflush.S */
	32	EXPORT_SYMBOL(cris_flush_cache);
	33	/* From cacheflush.S */
	34	EXPORT_SYMBOL(cris_flush_cache_range);