2 * linux/arch/arm/mm/tlb-v7.S
4 * Copyright (C) 1997-2002 Russell King
5 * Modified for ARMv7 by Catalin Marinas
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * ARM architecture version 6 TLB handling functions.
12 * These assume a split I/D TLB.
14 #include <linux/linkage.h>
15 #include <asm/asm-offsets.h>
17 #include <asm/tlbflush.h>
18 #include "proc-macros.S"
21 * v7wbi_flush_user_tlb_range(start, end, vma)
23 * Invalidate a range of TLB entries in the specified address space.
25 * - start - start address (may not be aligned)
26 * - end - end address (exclusive, may not be aligned)
27 * - vma - vma_struct describing address range
30 * - the "Invalidate single entry" instruction will invalidate
31 * both the I and the D TLBs on Harvard-style TLBs
33 ENTRY(v7wbi_flush_user_tlb_range)
34 vma_vm_mm r3, r2 @ get vma->vm_mm
35 mmid r3, r3 @ get vm_mm->context.id
37 mov r0, r0, lsr #PAGE_SHIFT @ align address
38 mov r1, r1, lsr #PAGE_SHIFT
39 asid r3, r3 @ mask ASID
40 orr r0, r3, r0, lsl #PAGE_SHIFT @ Create initial MVA
41 mov r1, r1, lsl #PAGE_SHIFT
42 vma_vm_flags r2, r2 @ get vma->vm_flags
44 mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA (was 1)
45 tst r2, #VM_EXEC @ Executable area ?
46 mcrne p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA (was 1)
51 mcr p15, 0, ip, c7, c5, 6 @ flush BTAC/BTB
56 * v7wbi_flush_kern_tlb_range(start,end)
58 * Invalidate a range of kernel TLB entries
60 * - start - start address (may not be aligned)
61 * - end - end address (exclusive, may not be aligned)
63 ENTRY(v7wbi_flush_kern_tlb_range)
65 mov r0, r0, lsr #PAGE_SHIFT @ align address
66 mov r1, r1, lsr #PAGE_SHIFT
67 mov r0, r0, lsl #PAGE_SHIFT
68 mov r1, r1, lsl #PAGE_SHIFT
70 mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA
71 mcr p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA
76 mcr p15, 0, r2, c7, c5, 6 @ flush BTAC/BTB
81 .section ".text.init", #alloc, #execinstr
83 .type v7wbi_tlb_fns, #object
85 .long v7wbi_flush_user_tlb_range
86 .long v7wbi_flush_kern_tlb_range
88 .size v7wbi_tlb_fns, . - v7wbi_tlb_fns