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authorSteven J. Hill <Steven.Hill@imgtec.com>2013-03-25 13:47:29 -0500
committerSteven J. Hill <Steven.Hill@imgtec.com>2013-05-01 16:32:49 -0500
commitb6d92b4a6bdb880b39789c677b952c53a437028d (patch)
treef14d30f02314d75860aa1ed12449410e6659513b /arch/mips/include/asm/dma-coherence.h
parentc34c09c81d659e13e15947580198fa652af3ca1a (diff)
MIPS: Add option to disable software I/O coherency.
Some MIPS controllers have hardware I/O coherency. This patch detects those and turns off software coherency. A new kernel command line option also allows the user to manually turn software coherency on or off. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Diffstat (limited to 'arch/mips/include/asm/dma-coherence.h')
-rw-r--r--arch/mips/include/asm/dma-coherence.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/mips/include/asm/dma-coherence.h b/arch/mips/include/asm/dma-coherence.h
new file mode 100644
index 000000000000..242cbb3ca582
--- /dev/null
+++ b/arch/mips/include/asm/dma-coherence.h
@@ -0,0 +1,15 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
+ *
+ */
+#ifndef __ASM_DMA_COHERENCE_H
+#define __ASM_DMA_COHERENCE_H
+
+extern int coherentio;
+extern int hw_coherentio;
+
+#endif