46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* TLB flush support for Hexagon
|
|
*
|
|
* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _ASM_TLBFLUSH_H
|
|
#define _ASM_TLBFLUSH_H
|
|
|
|
#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)
|
|
|
|
#endif
|