projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 7b64fef3 WD |
1 | /* |
| 2 | * Copyright (C) 2006 Atmel Corporation | |
| 3 | * | |
| 1a459660 | 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 7b64fef3 WD |
5 | */ |
| 6 | #ifndef __ASM_AVR32_DMA_MAPPING_H | |
| 7 | #define __ASM_AVR32_DMA_MAPPING_H | |
| 8 | ||
| 9 | #include <asm/io.h> | |
| d8f2aa32 | 10 | #include <asm/arch/cacheflush.h> |
| 7b64fef3 WD |
11 | |
| 12 | enum dma_data_direction { | |
| 13 | DMA_BIDIRECTIONAL = 0, | |
| 14 | DMA_TO_DEVICE = 1, | |
| 15 | DMA_FROM_DEVICE = 2, | |
| 16 | }; | |
| dbdb5abd AB |
17 | |
| 18 | static inline void *dma_alloc_coherent(size_t len, unsigned long *handle) | |
| 19 | { | |
| 20 | *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len); | |
| 21 | return (void *)*handle; | |
| 22 | } | |
| 7b64fef3 WD |
23 | |
| 24 | static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, | |
| 25 | enum dma_data_direction dir) | |
| 26 | { | |
| 27 | extern void __bad_dma_data_direction(void); | |
| 28 | ||
| 29 | switch (dir) { | |
| 30 | case DMA_BIDIRECTIONAL: | |
| 0e055435 AB |
31 | flush_dcache_range((unsigned long)vaddr, |
| 32 | (unsigned long)vaddr + len); | |
| 7b64fef3 WD |
33 | break; |
| 34 | case DMA_TO_DEVICE: | |
| 35 | dcache_clean_range(vaddr, len); | |
| 36 | break; | |
| 37 | case DMA_FROM_DEVICE: | |
| 0e055435 AB |
38 | invalidate_dcache_range((unsigned long)vaddr, |
| 39 | (unsigned long)vaddr + len); | |
| 7b64fef3 WD |
40 | break; |
| 41 | default: | |
| 42 | /* This will cause a linker error */ | |
| 43 | __bad_dma_data_direction(); | |
| 44 | } | |
| 45 | ||
| 46 | return virt_to_phys(vaddr); | |
| 47 | } | |
| 48 | ||
| 49 | static inline void dma_unmap_single(volatile void *vaddr, size_t len, | |
| 50 | unsigned long paddr) | |
| 51 | { | |
| 52 | ||
| 53 | } | |
| 54 | ||
| 55 | #endif /* __ASM_AVR32_DMA_MAPPING_H */ |