f1f3347da9
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>
24 lines
774 B
C
24 lines
774 B
C
/*
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* TLB Management (flush/create/diagnostics) for ARC700
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*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <asm/arcregs.h>
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#include <asm/mmu_context.h>
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#include <asm/tlb.h>
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/* A copy of the ASID from the PID reg is kept in asid_cache */
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int asid_cache = FIRST_ASID;
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/* ASID to mm struct mapping. We have one extra entry corresponding to
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* NO_ASID to save us a compare when clearing the mm entry for old asid
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* see get_new_mmu_context (asm-arc/mmu_context.h)
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*/
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struct mm_struct *asid_mm_map[NUM_ASID + 1];
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