From b4d56cdc55bc3c2a5ba31ffec162cc6f8334e0ff Mon Sep 17 00:00:00 2001 From: Ahmad Fatoum Date: Tue, 2 Jun 2020 10:54:01 +0200 Subject: sandbox: asm: implement stub DMA functions For compile-testing drivers that use DMA operations under sandbox, we want stub implementations of these. Provide them. Signed-off-by: Ahmad Fatoum Signed-off-by: Sascha Hauer --- arch/sandbox/include/asm/dma.h | 53 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 52 insertions(+), 1 deletion(-) diff --git a/arch/sandbox/include/asm/dma.h b/arch/sandbox/include/asm/dma.h index 459536779e..5e72d8e7df 100644 --- a/arch/sandbox/include/asm/dma.h +++ b/arch/sandbox/include/asm/dma.h @@ -8,6 +8,57 @@ #ifndef __ASM_DMA_H #define __ASM_DMA_H -/* empty*/ +#include +#include +#include + +#define dma_alloc dma_alloc +static inline void *dma_alloc(size_t size) +{ + return xmemalign(64, ALIGN(size, 64)); +} + +static inline void *dma_alloc_coherent(size_t size, dma_addr_t *dma_handle) +{ + void *ret = xmemalign(4096, size); + if (dma_handle) + *dma_handle = (dma_addr_t)ret; + + memset(ret, 0, size); + + return ret; +} + +static inline void *dma_alloc_writecombine(size_t size, dma_addr_t *dma_handle) +{ + return dma_alloc_coherent(size, dma_handle); +} + +static inline void dma_free_coherent(void *mem, dma_addr_t dma_handle, + size_t size) +{ + free(mem); +} + +static inline dma_addr_t dma_map_single(struct device_d *dev, void *ptr, size_t size, + enum dma_data_direction dir) +{ + return (dma_addr_t)ptr; +} + +static inline void dma_unmap_single(struct device_d *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir) +{ +} + +static inline void dma_sync_single_for_cpu(dma_addr_t address, size_t size, + enum dma_data_direction dir) +{ +} + +static inline void dma_sync_single_for_device(dma_addr_t address, size_t size, + enum dma_data_direction dir) +{ +} #endif /* __ASM_DMA_H */ -- cgit v1.2.3