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