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5df87c15 RK |
1 | /* |
2 | * TLB flush support for Hexagon | |
3 | * | |
e1858b2a | 4 | * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. |
5df87c15 RK |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 and | |
8 | * only version 2 as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
18 | * 02110-1301, USA. | |
19 | */ | |
20 | ||
21 | #ifndef _ASM_TLBFLUSH_H | |
22 | #define _ASM_TLBFLUSH_H | |
23 | ||
24 | #include <linux/mm.h> | |
25 | #include <asm/processor.h> | |
26 | ||
27 | /* | |
28 | * TLB flushing -- in "SMP", these routines get defined to be the | |
29 | * ones from smp.c, else they are some local flavors. | |
30 | */ | |
31 | ||
32 | /* | |
33 | * These functions are commonly macros, but in the interests of | |
34 | * VM vs. native implementation and code size, we simply declare | |
35 | * the function prototypes here. | |
36 | */ | |
37 | extern void tlb_flush_all(void); | |
38 | extern void flush_tlb_mm(struct mm_struct *mm); | |
39 | extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr); | |
40 | extern void flush_tlb_range(struct vm_area_struct *vma, | |
41 | unsigned long start, unsigned long end); | |
42 | extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); | |
43 | extern void flush_tlb_one(unsigned long); | |
44 | ||
45 | /* | |
46 | * "This is called in munmap when we have freed up some page-table pages. | |
47 | * We don't need to do anything here..." | |
48 | * | |
49 | * The VM kernel doesn't walk page tables, and they are passed to the VMM | |
50 | * by logical address. There doesn't seem to be any possibility that they | |
51 | * could be referenced by the VM kernel based on a stale mapping, since | |
52 | * they would only be located by consulting the mm structure, and they | |
53 | * will have been purged from that structure by the munmap. Seems like | |
54 | * a noop on HVM as well. | |
55 | */ | |
56 | #define flush_tlb_pgtables(mm, start, end) | |
57 | ||
58 | #endif |