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 
arch_dma_prep_coherent(struct page * page,size_t size)10 void arch_dma_prep_coherent(struct page *page, size_t size)
11 {
12 	__flush_purge_region(page_address(page), size);
13 }
14 
arch_sync_dma_for_device(phys_addr_t paddr,size_t size,enum dma_data_direction dir)15 void 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 }
34