1 files changed, 124 insertions, 0 deletions

diff --git a/arch/unicore32/include/asm/dma-mapping.h b/arch/unicore32/include/asm/dma-mapping.h
new file mode 100644
index 00000000000..9258e592f41
--- /dev/null
+++ b/arch/unicore32/include/asm/dma-mapping.h
@@ -0,0 +1,124 @@
+/*
+ * linux/arch/unicore32/include/asm/dma-mapping.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __UNICORE_DMA_MAPPING_H__
+#define __UNICORE_DMA_MAPPING_H__
+
+#ifdef __KERNEL__
+
+#include <linux/mm_types.h>
+#include <linux/scatterlist.h>
+#include <linux/swiotlb.h>
+
+#include <asm-generic/dma-coherent.h>
+
+#include <asm/memory.h>
+#include <asm/cacheflush.h>
+
+extern struct dma_map_ops swiotlb_dma_map_ops;
+
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+        return &swiotlb_dma_map_ops;
+}
+
+static inline int dma_supported(struct device *dev, u64 mask)
+{
+        struct dma_map_ops *dma_ops = get_dma_ops(dev);
+
+        if (unlikely(dma_ops == NULL))
+                return 0;
+
+        return dma_ops->dma_supported(dev, mask);
+}
+
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+        struct dma_map_ops *dma_ops = get_dma_ops(dev);
+
+        if (dma_ops->mapping_error)
+                return dma_ops->mapping_error(dev, dma_addr);
+
+        return 0;
+}
+
+#include <asm-generic/dma-mapping-common.h>
+
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
+{
+        if (dev && dev->dma_mask)
+                return addr + size - 1 <= *dev->dma_mask;
+
+        return 1;
+}
+
+static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
+{
+        return paddr;
+}
+
+static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
+{
+        return daddr;
+}
+
+static inline void dma_mark_clean(void *addr, size_t size) {}
+
+static inline int dma_set_mask(struct device *dev, u64 dma_mask)
+{
+        if (!dev->dma_mask || !dma_supported(dev, dma_mask))
+                return -EIO;
+
+        *dev->dma_mask = dma_mask;
+
+        return 0;
+}
+
+static inline void *dma_alloc_coherent(struct device *dev, size_t size,
+                                       dma_addr_t *dma_handle, gfp_t flag)
+{
+        struct dma_map_ops *dma_ops = get_dma_ops(dev);
+
+        return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
+}
+
+static inline void dma_free_coherent(struct device *dev, size_t size,
+                                     void *cpu_addr, dma_addr_t dma_handle)
+{
+        struct dma_map_ops *dma_ops = get_dma_ops(dev);
+
+        dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
+}
+
+#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
+#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+
+static inline void dma_cache_sync(struct device *dev, void *vaddr,
+                size_t size, enum dma_data_direction direction)
+{
+        unsigned long start = (unsigned long)vaddr;
+        unsigned long end   = start + size;
+
+        switch (direction) {
+        case DMA_NONE:
+                BUG();
+        case DMA_FROM_DEVICE:
+        case DMA_BIDIRECTIONAL: /* writeback and invalidate */
+                __cpuc_dma_flush_range(start, end);
+                break;
+        case DMA_TO_DEVICE:             /* writeback only */
+                __cpuc_dma_clean_range(start, end);
+                break;
+        }
+}
+
+#endif /* __KERNEL__ */
+#endif