1 // SPDX-License-Identifier: GPL-2.0-only 1
2 /*
3 * Based on linux/arch/arm/mm/dma-mapping.c
4 *
5 * Copyright (C) 2000-2004 Russell King
6 */
7
8 #include <linux/dma-map-ops.h>
9 #include <asm/cachetype.h>
10 #include <asm/cacheflush.h>
11 #include <asm/outercache.h>
12 #include <asm/cp15.h>
13
14 #include "dma.h"
15
16 void arch_sync_dma_for_device(phys_addr_t padd
17 enum dma_data_direction dir)
18 {
19 dmac_map_area(__va(paddr), size, dir);
20
21 if (dir == DMA_FROM_DEVICE)
22 outer_inv_range(paddr, paddr +
23 else
24 outer_clean_range(paddr, paddr
25 }
26
27 void arch_sync_dma_for_cpu(phys_addr_t paddr,
28 enum dma_data_direction dir)
29 {
30 if (dir != DMA_TO_DEVICE) {
31 outer_inv_range(paddr, paddr +
32 dmac_unmap_area(__va(paddr), s
33 }
34 }
35
36 void arch_setup_dma_ops(struct device *dev, bo
37 {
38 if (IS_ENABLED(CONFIG_CPU_V7M)) {
39 /*
40 * Cache support for v7m is op
41 * coherent if no cache has be
42 * enough to check if MPU is i
43 * MPU system memory map is us
44 */
45 dev->dma_coherent = cacheid ?
46 } else {
47 /*
48 * Assume coherent DMA in case
49 */
50 dev->dma_coherent = (get_cr()
51 }
52 }
53
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