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Viewing changes to roms/u-boot/arch/nios2/include/asm/dma-mapping.h

  • Committer: Phil Dennis-Jordan
  • Date: 2017-07-21 08:03:43 UTC
  • mfrom: (1.1.1)
  • Revision ID: phil@philjordan.eu-20170721080343-2yr2vdj7713czahv
New upstream release 2.9.0.

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roms/u-boot/arch/nios2/include/asm/dma-mapping.h
 
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#ifndef __ASM_NIOS2_DMA_MAPPING_H
 
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#define __ASM_NIOS2_DMA_MAPPING_H
 
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/* dma_alloc_coherent() return cache-line aligned allocation which is mapped
 
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 * to uncached io region.
 
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 *
 
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 * IO_REGION_BASE should be defined in board config header file
 
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 *   0x80000000 for nommu, 0xe0000000 for mmu
 
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 */
 
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static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
 
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{
 
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        void *addr = malloc(len + CONFIG_SYS_DCACHELINE_SIZE);
 
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        if (!addr)
 
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                return 0;
 
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        flush_dcache((unsigned long)addr, len + CONFIG_SYS_DCACHELINE_SIZE);
 
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        *handle = ((unsigned long)addr +
 
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                   (CONFIG_SYS_DCACHELINE_SIZE - 1)) &
 
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                ~(CONFIG_SYS_DCACHELINE_SIZE - 1) & ~(IO_REGION_BASE);
 
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        return (void *)(*handle | IO_REGION_BASE);
 
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}
 
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#endif /* __ASM_NIOS2_DMA_MAPPING_H */