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