2011-10-31 18:52:00 -05:00
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/*
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* TLB flush support for Hexagon
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*
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2012-09-19 16:22:02 -05:00
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* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
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2011-10-31 18:52:00 -05:00
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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 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#ifndef _ASM_TLBFLUSH_H
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#define _ASM_TLBFLUSH_H
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#include <linux/mm.h>
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#include <asm/processor.h>
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/*
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* TLB flushing -- in "SMP", these routines get defined to be the
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* ones from smp.c, else they are some local flavors.
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*/
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/*
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* These functions are commonly macros, but in the interests of
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* VM vs. native implementation and code size, we simply declare
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* the function prototypes here.
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*/
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extern void tlb_flush_all(void);
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extern void flush_tlb_mm(struct mm_struct *mm);
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extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr);
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extern void flush_tlb_range(struct vm_area_struct *vma,
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unsigned long start, unsigned long end);
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extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
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extern void flush_tlb_one(unsigned long);
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/*
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* "This is called in munmap when we have freed up some page-table pages.
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* We don't need to do anything here..."
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*
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* The VM kernel doesn't walk page tables, and they are passed to the VMM
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* by logical address. There doesn't seem to be any possibility that they
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* could be referenced by the VM kernel based on a stale mapping, since
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* they would only be located by consulting the mm structure, and they
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* will have been purged from that structure by the munmap. Seems like
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* a noop on HVM as well.
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*/
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#define flush_tlb_pgtables(mm, start, end)
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#endif
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