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nios2: add dma_alloc_coherent with asm-nios2/dma-mapping.h

PATCH Superseded Thomas Chou 2 participants 4 messages Mar 24, 2010 – Apr 23, 2010 NIOS2 architecture

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Thomas Chou

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#0 lore raw

PATCH 1/1 nios2: add dma_alloc_coherent with asm-nios2/dma-mapping.h

This function return cache-line aligned allocation which is mapped to uncached io region.

Signed-off-by Thomas Chou <[email protected]>
---
 include/asm-nios2/dma-mapping.h |   21 +++++++++++++++++++++
 1 files changed, 21 insertions(+), 0 deletions(-)
 create mode 100644 include/asm-nios2/dma-mapping.h
include/asm-nios2/dma-mapping.h new file +21 -0
new file mode 100644
index 0000000..1fa19ac
@@ -0,0 +1,21 @@
+#ifndef __ASM_NIOS2_DMA_MAPPING_H
+#define __ASM_NIOS2_DMA_MAPPING_H
+
+/* dma_alloc_coherent() return cache-line aligned allocation which is mapped
+ * to uncached io region.
+ *
+ * IO_REGION_BASE should be defined in board config header file
+ *   0x80000000 for nommu, 0xe0000000 for mmu
+ */
+
+static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
+{
+	void *addr = malloc(len + CONFIG_SYS_DCACHELINE_SIZE);
+	flush_dcache((unsigned long)addr, len + CONFIG_SYS_DCACHELINE_SIZE);
+	*handle = ((unsigned long)addr +
+		   (CONFIG_SYS_DCACHELINE_SIZE - 1)) &
+		~(CONFIG_SYS_DCACHELINE_SIZE - 1) & ~(IO_REGION_BASE);
+	return (void *)(*handle | IO_REGION_BASE);
+}
+
+#endif /* __ASM_NIOS2_DMA_MAPPING_H */
Signature · 1 line
1.6.6.1
author
#1 lore raw

PATCH v2 1/1 nios2: add dma_alloc_coherent with asm-nios2/dma-mapping.h

This function return cache-line aligned allocation which is mapped to uncached io region.

Signed-off-by Thomas Chou <[email protected]>
---
 include/asm-nios2/dma-mapping.h |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)
 create mode 100644 include/asm-nios2/dma-mapping.h
include/asm-nios2/dma-mapping.h new file +23 -0
new file mode 100644
index 0000000..1350e3b
@@ -0,0 +1,23 @@
+#ifndef __ASM_NIOS2_DMA_MAPPING_H
+#define __ASM_NIOS2_DMA_MAPPING_H
+
+/* dma_alloc_coherent() return cache-line aligned allocation which is mapped
+ * to uncached io region.
+ *
+ * IO_REGION_BASE should be defined in board config header file
+ *   0x80000000 for nommu, 0xe0000000 for mmu
+ */
+
+static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
+{
+	void *addr = malloc(len + CONFIG_SYS_DCACHELINE_SIZE);
+	if (!addr)
+		return 0;
+	flush_dcache((unsigned long)addr, len + CONFIG_SYS_DCACHELINE_SIZE);
+	*handle = ((unsigned long)addr +
+		   (CONFIG_SYS_DCACHELINE_SIZE - 1)) &
+		~(CONFIG_SYS_DCACHELINE_SIZE - 1) & ~(IO_REGION_BASE);
+	return (void *)(*handle | IO_REGION_BASE);
+}
+
+#endif /* __ASM_NIOS2_DMA_MAPPING_H */
Signature · 1 line
1.6.6.1
author
#2 lore raw

PATCH v3 1/1 nios2: add dma_alloc_coherent

In reply to Thomas Chou

This function return cache-line aligned allocation which is mapped to uncached io region.

Signed-off-by Thomas Chou <[email protected]>

---
arch dir reorganized.

 arch/nios2/include/asm/dma-mapping.h |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)
 create mode 100644 arch/nios2/include/asm/dma-mapping.h
arch/nios2/include/asm/dma-mapping.h new file +23 -0
new file mode 100644
index 0000000..1350e3b
@@ -0,0 +1,23 @@
+#ifndef __ASM_NIOS2_DMA_MAPPING_H
+#define __ASM_NIOS2_DMA_MAPPING_H
+
+/* dma_alloc_coherent() return cache-line aligned allocation which is mapped
+ * to uncached io region.
+ *
+ * IO_REGION_BASE should be defined in board config header file
+ *   0x80000000 for nommu, 0xe0000000 for mmu
+ */
+
+static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
+{
+	void *addr = malloc(len + CONFIG_SYS_DCACHELINE_SIZE);
+	if (!addr)
+		return 0;
+	flush_dcache((unsigned long)addr, len + CONFIG_SYS_DCACHELINE_SIZE);
+	*handle = ((unsigned long)addr +
+		   (CONFIG_SYS_DCACHELINE_SIZE - 1)) &
+		~(CONFIG_SYS_DCACHELINE_SIZE - 1) & ~(IO_REGION_BASE);
+	return (void *)(*handle | IO_REGION_BASE);
+}
+
+#endif /* __ASM_NIOS2_DMA_MAPPING_H */
Signature · 1 line
1.6.6.1
Applied
#3 lore raw

PATCH v3 1/1 nios2: add dma_alloc_coherent

Applied. Thanks.
--Scott

Quoted 40 lines · Thomas Chou

This function return cache-line aligned allocation which is mapped to uncached io region.

Signed-off-by Thomas Chou <[email protected]>

---
arch dir reorganized.

 arch/nios2/include/asm/dma-mapping.h |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)
 create mode 100644 arch/nios2/include/asm/dma-mapping.h
arch/nios2/include/asm/dma-mapping.h new file +23 -0
new file mode 100644
index 0000000..1350e3b
@@ -0,0 +1,23 @@
+#ifndef __ASM_NIOS2_DMA_MAPPING_H
+#define __ASM_NIOS2_DMA_MAPPING_H
+
+/* dma_alloc_coherent() return cache-line aligned allocation which is mapped
+ * to uncached io region.
+ *
+ * IO_REGION_BASE should be defined in board config header file
+ *   0x80000000 for nommu, 0xe0000000 for mmu
+ */
+
+static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
+{
+	void *addr = malloc(len + CONFIG_SYS_DCACHELINE_SIZE);
+	if (!addr)
+		return 0;
+	flush_dcache((unsigned long)addr, len + CONFIG_SYS_DCACHELINE_SIZE);
+	*handle = ((unsigned long)addr +
+		   (CONFIG_SYS_DCACHELINE_SIZE - 1)) &
+		~(CONFIG_SYS_DCACHELINE_SIZE - 1) & ~(IO_REGION_BASE);
+	return (void *)(*handle | IO_REGION_BASE);
+}
+
+#endif /* __ASM_NIOS2_DMA_MAPPING_H */