1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * TLB flush support for Hexagon 4 * 5 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. 6 */ 7 8 #ifndef _ASM_TLBFLUSH_H 9 #define _ASM_TLBFLUSH_H 10 11 #include <linux/mm.h> 12 #include <asm/processor.h> 13 14 /* 15 * TLB flushing -- in "SMP", these routines get defined to be the 16 * ones from smp.c, else they are some local flavors. 17 */ 18 19 /* 20 * These functions are commonly macros, but in the interests of 21 * VM vs. native implementation and code size, we simply declare 22 * the function prototypes here. 23 */ 24 extern void tlb_flush_all(void); 25 extern void flush_tlb_mm(struct mm_struct *mm); 26 extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr); 27 extern void flush_tlb_range(struct vm_area_struct *vma, 28 unsigned long start, unsigned long end); 29 extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); 30 extern void flush_tlb_one(unsigned long); 31 32 /* 33 * "This is called in munmap when we have freed up some page-table pages. 34 * We don't need to do anything here..." 35 * 36 * The VM kernel doesn't walk page tables, and they are passed to the VMM 37 * by logical address. There doesn't seem to be any possibility that they 38 * could be referenced by the VM kernel based on a stale mapping, since 39 * they would only be located by consulting the mm structure, and they 40 * will have been purged from that structure by the munmap. Seems like 41 * a noop on HVM as well. 42 */ 43 #define flush_tlb_pgtables(mm, start, end) 44 45 #endif