1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2004 - 2007  Paul Mundt
 4 */
 5#include <linux/mm.h>
 6#include <linux/dma-map-ops.h>
 7#include <asm/cacheflush.h>
 8#include <asm/addrspace.h>
 9
10void arch_dma_prep_coherent(struct page *page, size_t size)
11{
12	__flush_purge_region(page_address(page), size);
13}
14
15void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
16		enum dma_data_direction dir)
17{
18	void *addr = sh_cacheop_vaddr(phys_to_virt(paddr));
19
20	switch (dir) {
21	case DMA_FROM_DEVICE:		/* invalidate only */
22		__flush_invalidate_region(addr, size);
23		break;
24	case DMA_TO_DEVICE:		/* writeback only */
25		__flush_wback_region(addr, size);
26		break;
27	case DMA_BIDIRECTIONAL:		/* writeback and invalidate */
28		__flush_purge_region(addr, size);
29		break;
30	default:
31		BUG();
32	}
33}