1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * linux/arch/arm/mm/tlb-v7.S
5 * Copyright (C) 1997-2002 Russell King
6 * Modified for ARMv7 by Catalin Marinas
8 * ARM architecture version 6 TLB handling functions.
9 * These assume a split I/D TLB.
11 #include <linux/init.h>
12 #include <linux/linkage.h>
13 #include <asm/assembler.h>
14 #include <asm/asm-offsets.h>
16 #include <asm/tlbflush.h>
17 #include "proc-macros.S"
20 * v7wbi_flush_user_tlb_range(start, end, vma)
22 * Invalidate a range of TLB entries in the specified address space.
24 * - start - start address (may not be aligned)
25 * - end - end address (exclusive, may not be aligned)
26 * - vma - vma_struct describing address range
29 * - the "Invalidate single entry" instruction will invalidate
30 * both the I and the D TLBs on Harvard-style TLBs
32 ENTRY(v7wbi_flush_user_tlb_range)
33 vma_vm_mm r3, r2 @ get vma->vm_mm
34 mmid r3, r3 @ get vm_mm->context.id
36 mov r0, r0, lsr #PAGE_SHIFT @ align address
37 mov r1, r1, lsr #PAGE_SHIFT
38 asid r3, r3 @ mask ASID
39 #ifdef CONFIG_ARM_ERRATA_720789
40 ALT_SMP(W(mov) r3, #0 )
43 orr r0, r3, r0, lsl #PAGE_SHIFT @ Create initial MVA
44 mov r1, r1, lsl #PAGE_SHIFT
46 #ifdef CONFIG_ARM_ERRATA_720789
47 ALT_SMP(mcr p15, 0, r0, c8, c3, 3) @ TLB invalidate U MVA all ASID (shareable)
49 ALT_SMP(mcr p15, 0, r0, c8, c3, 1) @ TLB invalidate U MVA (shareable)
51 ALT_UP(mcr p15, 0, r0, c8, c7, 1) @ TLB invalidate U MVA
58 ENDPROC(v7wbi_flush_user_tlb_range)
61 * v7wbi_flush_kern_tlb_range(start,end)
63 * Invalidate a range of kernel TLB entries
65 * - start - start address (may not be aligned)
66 * - end - end address (exclusive, may not be aligned)
68 ENTRY(v7wbi_flush_kern_tlb_range)
70 mov r0, r0, lsr #PAGE_SHIFT @ align address
71 mov r1, r1, lsr #PAGE_SHIFT
72 mov r0, r0, lsl #PAGE_SHIFT
73 mov r1, r1, lsl #PAGE_SHIFT
75 #ifdef CONFIG_ARM_ERRATA_720789
76 ALT_SMP(mcr p15, 0, r0, c8, c3, 3) @ TLB invalidate U MVA all ASID (shareable)
78 ALT_SMP(mcr p15, 0, r0, c8, c3, 1) @ TLB invalidate U MVA (shareable)
80 ALT_UP(mcr p15, 0, r0, c8, c7, 1) @ TLB invalidate U MVA
87 ENDPROC(v7wbi_flush_kern_tlb_range)
91 /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */
92 define_tlb_functions v7wbi, v7wbi_tlb_flags_up, flags_smp=v7wbi_tlb_flags_smp