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/init.h>
15 #include <linux/linkage.h>
16 #include <asm/assembler.h>
17 #include <asm/asm-offsets.h>
19 #include <asm/tlbflush.h>
20 #include "proc-macros.S"
23 * v7wbi_flush_user_tlb_range(start, end, vma)
25 * Invalidate a range of TLB entries in the specified address space.
27 * - start - start address (may not be aligned)
28 * - end - end address (exclusive, may not be aligned)
29 * - vma - vma_struct describing address range
32 * - the "Invalidate single entry" instruction will invalidate
33 * both the I and the D TLBs on Harvard-style TLBs
35 ENTRY(v7wbi_flush_user_tlb_range)
36 vma_vm_mm r3, r2 @ get vma->vm_mm
37 mmid r3, r3 @ get vm_mm->context.id
39 mov r0, r0, lsr #PAGE_SHIFT @ align address
40 mov r1, r1, lsr #PAGE_SHIFT
41 asid r3, r3 @ mask ASID
42 #ifdef CONFIG_ARM_ERRATA_720789
43 ALT_SMP(W(mov) r3, #0 )
46 orr r0, r3, r0, lsl #PAGE_SHIFT @ Create initial MVA
47 mov r1, r1, lsl #PAGE_SHIFT
49 #ifdef CONFIG_ARM_ERRATA_720789
50 ALT_SMP(mcr p15, 0, r0, c8, c3, 3) @ TLB invalidate U MVA all ASID (shareable)
52 ALT_SMP(mcr p15, 0, r0, c8, c3, 1) @ TLB invalidate U MVA (shareable)
54 ALT_UP(mcr p15, 0, r0, c8, c7, 1) @ TLB invalidate U MVA
60 ALT_SMP(mcr p15, 0, ip, c7, c1, 6) @ flush BTAC/BTB Inner Shareable
61 ALT_UP(mcr p15, 0, ip, c7, c5, 6) @ flush BTAC/BTB
64 ENDPROC(v7wbi_flush_user_tlb_range)
67 * v7wbi_flush_kern_tlb_range(start,end)
69 * Invalidate a range of kernel TLB entries
71 * - start - start address (may not be aligned)
72 * - end - end address (exclusive, may not be aligned)
74 ENTRY(v7wbi_flush_kern_tlb_range)
76 mov r0, r0, lsr #PAGE_SHIFT @ align address
77 mov r1, r1, lsr #PAGE_SHIFT
78 mov r0, r0, lsl #PAGE_SHIFT
79 mov r1, r1, lsl #PAGE_SHIFT
81 #ifdef CONFIG_ARM_ERRATA_720789
82 ALT_SMP(mcr p15, 0, r0, c8, c3, 3) @ TLB invalidate U MVA all ASID (shareable)
84 ALT_SMP(mcr p15, 0, r0, c8, c3, 1) @ TLB invalidate U MVA (shareable)
86 ALT_UP(mcr p15, 0, r0, c8, c7, 1) @ TLB invalidate U MVA
91 ALT_SMP(mcr p15, 0, r2, c7, c1, 6) @ flush BTAC/BTB Inner Shareable
92 ALT_UP(mcr p15, 0, r2, c7, c5, 6) @ flush BTAC/BTB
96 ENDPROC(v7wbi_flush_kern_tlb_range)
100 .type v7wbi_tlb_fns, #object
102 .long v7wbi_flush_user_tlb_range
103 .long v7wbi_flush_kern_tlb_range
104 ALT_SMP(.long v7wbi_tlb_flags_smp)
105 ALT_UP(.long v7wbi_tlb_flags_up)
106 .size v7wbi_tlb_fns, . - v7wbi_tlb_fns