From 94d8f732c20ef3722401c455fff2d777802720bc Mon Sep 17 00:00:00 2001 From: Franck Jullien Date: Sun, 16 Sep 2012 13:38:15 +0200 Subject: nios2: Fix DMA functions when CPU has no dcache Signed-off-by: Franck Jullien Signed-off-by: Sascha Hauer --- arch/nios2/include/asm/dma-mapping.h | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'arch/nios2') diff --git a/arch/nios2/include/asm/dma-mapping.h b/arch/nios2/include/asm/dma-mapping.h index 9819a973e7..620c207a03 100644 --- a/arch/nios2/include/asm/dma-mapping.h +++ b/arch/nios2/include/asm/dma-mapping.h @@ -6,7 +6,6 @@ #include - /* dma_alloc_coherent() return cache-line aligned allocation which is mapped * to uncached io region. * @@ -14,6 +13,7 @@ * 0x80000000 for nommu, 0xe0000000 for mmu */ +#if (DCACHE_SIZE != 0) static inline void *dma_alloc_coherent(size_t len, unsigned long *handle) { void *addr = malloc(len + DCACHE_LINE_SIZE); @@ -25,11 +25,23 @@ static inline void *dma_alloc_coherent(size_t len, unsigned long *handle) ~(DCACHE_LINE_SIZE - 1) & ~(IO_REGION_BASE); return (void *)(*handle | IO_REGION_BASE); } +#else +static inline void *dma_alloc_coherent(size_t len, unsigned long *handle) +{ + void *addr = malloc(len); + if (!addr) + return 0; + *handle = (unsigned long)addr; + return (void *)(*handle | IO_REGION_BASE); +} +#endif +#if (DCACHE_SIZE != 0) #define dma_alloc dma_alloc static inline void *dma_alloc(size_t size) { return xmemalign(DCACHE_LINE_SIZE, ALIGN(size, DCACHE_LINE_SIZE)); } +#endif #endif /* __ASM_NIOS2_DMA_MAPPING_H */ -- cgit v1.2.3