1/*
 2 * This file is subject to the terms and conditions of the GNU General Public
 3 * License.  See the file COPYING in the main directory of this archive
 4 * for more details.
 5 */
 6
 
 
 7#include <linux/dma-map-ops.h>
 
 8#include <linux/kernel.h>
 
 
 
 
 
 
 9#include <asm/cacheflush.h>
10
11#ifndef CONFIG_COLDFIRE
12void arch_dma_prep_coherent(struct page *page, size_t size)
13{
14	cache_push(page_to_phys(page), size);
15}
16
17pgprot_t pgprot_dmacoherent(pgprot_t prot)
18{
19	if (CPU_IS_040_OR_060) {
20		pgprot_val(prot) &= ~_PAGE_CACHE040;
21		pgprot_val(prot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
22	} else {
23		pgprot_val(prot) |= _PAGE_NOCACHE030;
24	}
25	return prot;
26}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
27#endif /* CONFIG_MMU && !CONFIG_COLDFIRE */
28
29void arch_sync_dma_for_device(phys_addr_t handle, size_t size,
30		enum dma_data_direction dir)
31{
32	switch (dir) {
33	case DMA_BIDIRECTIONAL:
34	case DMA_TO_DEVICE:
35		cache_push(handle, size);
36		break;
37	case DMA_FROM_DEVICE:
38		cache_clear(handle, size);
39		break;
40	default:
41		pr_err_ratelimited("dma_sync_single_for_device: unsupported dir %u\n",
42				   dir);
43		break;
44	}
45}

 1/*
 2 * This file is subject to the terms and conditions of the GNU General Public
 3 * License.  See the file COPYING in the main directory of this archive
 4 * for more details.
 5 */
 6
 7#undef DEBUG
 8
 9#include <linux/dma-map-ops.h>
10#include <linux/device.h>
11#include <linux/kernel.h>
12#include <linux/platform_device.h>
13#include <linux/scatterlist.h>
14#include <linux/slab.h>
15#include <linux/vmalloc.h>
16#include <linux/export.h>
17
18#include <asm/cacheflush.h>
19
20#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
21void arch_dma_prep_coherent(struct page *page, size_t size)
22{
23	cache_push(page_to_phys(page), size);
24}
25
26pgprot_t pgprot_dmacoherent(pgprot_t prot)
27{
28	if (CPU_IS_040_OR_060) {
29		pgprot_val(prot) &= ~_PAGE_CACHE040;
30		pgprot_val(prot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
31	} else {
32		pgprot_val(prot) |= _PAGE_NOCACHE030;
33	}
34	return prot;
35}
36#else
37void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
38		gfp_t gfp, unsigned long attrs)
39{
40	void *ret;
41
42	if (dev == NULL || (*dev->dma_mask < 0xffffffff))
43		gfp |= GFP_DMA;
44	ret = (void *)__get_free_pages(gfp, get_order(size));
45
46	if (ret != NULL) {
47		memset(ret, 0, size);
48		*dma_handle = virt_to_phys(ret);
49	}
50	return ret;
51}
52
53void arch_dma_free(struct device *dev, size_t size, void *vaddr,
54		dma_addr_t dma_handle, unsigned long attrs)
55{
56	free_pages((unsigned long)vaddr, get_order(size));
57}
58
59#endif /* CONFIG_MMU && !CONFIG_COLDFIRE */
60
61void arch_sync_dma_for_device(phys_addr_t handle, size_t size,
62		enum dma_data_direction dir)
63{
64	switch (dir) {
65	case DMA_BIDIRECTIONAL:
66	case DMA_TO_DEVICE:
67		cache_push(handle, size);
68		break;
69	case DMA_FROM_DEVICE:
70		cache_clear(handle, size);
71		break;
72	default:
73		pr_err_ratelimited("dma_sync_single_for_device: unsupported dir %u\n",
74				   dir);
75		break;
76	}
77}