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nds32: introduce DMA allocation API 

U-Boot does not compile for the adp-ag101 boards since
commit a8f9cd1893
(net: update FTGMAC100 for MMU/D-cache support)

The driver assumes that the DMA allocation API are provided by all
architectures. This is not the case for nds32 and it causes a
build error. This patch adds DMA allocation API to avoid the errors.

Signed-off-by: Kuan-Yu Kuo <ken.kuoky@gmail.com>
Cc: Macpaul Lin <macpaul@gmail.com>
Cc: Andes <uboot@andestech.com>
Signed-off-by: Andes <uboot@andestech.com>
utp
ken kuo 2013-08-06 01:00:53 +08:00 committed by Andes
parent 5c440813a7
commit 9f128bcc07
1 changed files with 33 additions and 0 deletions
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33
arch/nds32/include/asm/dma-mapping.h 100644
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/*
* Copyright (C) 2013 Andes Technology Corporation
* Ken Kuo, Andes Technology Corporation <ken_kuo@andestech.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __ASM_NDS_DMA_MAPPING_H
#define __ASM_NDS_DMA_MAPPING_H
enum dma_data_direction {
DMA_BIDIRECTIONAL = 0,
DMA_TO_DEVICE = 1,
DMA_FROM_DEVICE = 2,
};
static void *dma_alloc_coherent(size_t len, unsigned long *handle)
{
*handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len);
return (void *)*handle;
}
static inline unsigned long dma_map_single(volatile void *vaddr, size_t len,
enum dma_data_direction dir)
{
return (unsigned long)vaddr;
}
static inline void dma_unmap_single(volatile void *vaddr, size_t len,
unsigned long paddr)
{
}
#endif /* __ASM_NDS_DMA_MAPPING_H */