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-noncoherent.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
37
38#include <asm/cacheflush.h>
39
40void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
41		gfp_t gfp, unsigned long attrs)
42{
43	void *ret;
44
45	if (dev == NULL || (*dev->dma_mask < 0xffffffff))
46		gfp |= GFP_DMA;
47	ret = (void *)__get_free_pages(gfp, get_order(size));
48
49	if (ret != NULL) {
50		memset(ret, 0, size);
51		*dma_handle = virt_to_phys(ret);
52	}
53	return ret;
54}
55
56void arch_dma_free(struct device *dev, size_t size, void *vaddr,
57		dma_addr_t dma_handle, unsigned long attrs)
58{
59	free_pages((unsigned long)vaddr, get_order(size));
60}
61
62#endif /* CONFIG_MMU && !CONFIG_COLDFIRE */
63
64void arch_sync_dma_for_device(phys_addr_t handle, size_t size,
65		enum dma_data_direction dir)
66{
67	switch (dir) {
68	case DMA_BIDIRECTIONAL:
69	case DMA_TO_DEVICE:
70		cache_push(handle, size);
71		break;
72	case DMA_FROM_DEVICE:
73		cache_clear(handle, size);
74		break;
75	default:
76		pr_err_ratelimited("dma_sync_single_for_device: unsupported dir %u\n",
77				   dir);
78		break;
79	}
80}

 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-noncoherent.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/pgalloc.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
37
38#include <asm/cacheflush.h>
39
40void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
41		gfp_t gfp, unsigned long attrs)
42{
43	void *ret;
44
45	if (dev == NULL || (*dev->dma_mask < 0xffffffff))
46		gfp |= GFP_DMA;
47	ret = (void *)__get_free_pages(gfp, get_order(size));
48
49	if (ret != NULL) {
50		memset(ret, 0, size);
51		*dma_handle = virt_to_phys(ret);
52	}
53	return ret;
54}
55
56void arch_dma_free(struct device *dev, size_t size, void *vaddr,
57		dma_addr_t dma_handle, unsigned long attrs)
58{
59	free_pages((unsigned long)vaddr, get_order(size));
60}
61
62#endif /* CONFIG_MMU && !CONFIG_COLDFIRE */
63
64void arch_sync_dma_for_device(struct device *dev, phys_addr_t handle,
65		size_t size, enum dma_data_direction dir)
66{
67	switch (dir) {
68	case DMA_BIDIRECTIONAL:
69	case DMA_TO_DEVICE:
70		cache_push(handle, size);
71		break;
72	case DMA_FROM_DEVICE:
73		cache_clear(handle, size);
74		break;
75	default:
76		pr_err_ratelimited("dma_sync_single_for_device: unsupported dir %u\n",
77				   dir);
78		break;
79	}
80}