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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2017-07-06 11:41:51 (GMT)
committerBin Meng <bmeng.cn@gmail.com>2017-07-30 02:30:25 (GMT)
commitb7026b0c98d2e9f6d190a80c500a0c21a0f3ddc8 (patch)
tree1d6ce63c1dd2406d8a5df6eb34f4561e2dd03b38 /arch/x86
parent8f8a12d1e79779783a724e7a0f5d07c44dcfa872 (diff)
downloadu-boot-b7026b0c98d2e9f6d190a80c500a0c21a0f3ddc8.tar.xz
x86: Add dma-mapping.h to architectural code
Some cross-platform drivers rely on this header present. Make it so for x86. It's just a copy'n'paste of arch/arm/include/asm/dma-mapping.h. Suggested-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/dma-mapping.h41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
new file mode 100644
index 0000000..7de4c08
--- /dev/null
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -0,0 +1,41 @@
+/*
+ * (C) Copyright 2007
+ * Stelian Pop <stelian@popies.net>
+ * Lead Tech Design <www.leadtechdesign.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#ifndef __ASM_X86_DMA_MAPPING_H
+#define __ASM_X86_DMA_MAPPING_H
+
+#define dma_mapping_error(x, y) 0
+
+enum dma_data_direction {
+ DMA_BIDIRECTIONAL = 0,
+ DMA_TO_DEVICE = 1,
+ DMA_FROM_DEVICE = 2,
+};
+
+static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
+{
+ *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len);
+ return (void *)*handle;
+}
+
+static inline void dma_free_coherent(void *addr)
+{
+ free(addr);
+}
+
+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_X86_DMA_MAPPING_H */