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authorVineet Gupta <vgupta@synopsys.com>2013-01-18 15:12:19 +0530
committerVineet Gupta <vgupta@synopsys.com>2013-02-15 23:15:51 +0530
commitf1f3347da9440eedd2350f4f5d13d8860f570b92 (patch)
tree47d652aeaf9c4455d085578c976c73789620ba8c /arch/arc/include/asm/mmu.h
parent5dda4dc570ac41e3bd73ef871c500aeb7005c6b0 (diff)
ARC: MMU Context Management
ARC700 MMU provides for tagging TLB entries with a 8-bit ASID to avoid having to flush the TLB every task switch. It also allows for a quick way to invalidate all the TLB entries for task useful for: * COW sementics during fork() * task exit()ing Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/include/asm/mmu.h')
-rw-r--r--arch/arc/include/asm/mmu.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arc/include/asm/mmu.h b/arch/arc/include/asm/mmu.h
new file mode 100644
index 000000000000..56b02320f1a9
--- /dev/null
+++ b/arch/arc/include/asm/mmu.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * 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 _ASM_ARC_MMU_H
+#define _ASM_ARC_MMU_H
+
+#ifndef __ASSEMBLY__
+
+typedef struct {
+ unsigned long asid; /* Pvt Addr-Space ID for mm */
+#ifdef CONFIG_ARC_TLB_DBG
+ struct task_struct *tsk;
+#endif
+} mm_context_t;
+
+#endif
+
+#endif