1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * linux/arch/arm/mm/tlb-v6.S
5 * Copyright (C) 1997-2002 Russell King
7 * ARM architecture version 6 TLB handling functions.
8 * These assume a split I/D TLB.
10 #include <linux/init.h>
11 #include <linux/linkage.h>
12 #include <asm/asm-offsets.h>
13 #include <asm/assembler.h>
15 #include <asm/tlbflush.h>
16 #include "proc-macros.S"
21 * v6wbi_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(v6wbi_flush_user_tlb_range)
34 vma_vm_mm r3, r2 @ get vma->vm_mm
36 mmid r3, r3 @ get vm_mm->context.id
37 mcr p15, 0, ip, c7, c10, 4 @ drain write buffer
38 mov r0, r0, lsr #PAGE_SHIFT @ align address
39 mov r1, r1, lsr #PAGE_SHIFT
40 asid r3, r3 @ mask ASID
41 orr r0, r3, r0, lsl #PAGE_SHIFT @ Create initial MVA
42 mov r1, r1, lsl #PAGE_SHIFT
43 vma_vm_flags r2, r2 @ get vma->vm_flags
46 mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA (was 1)
47 tst r2, #VM_EXEC @ Executable area ?
48 mcrne p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA (was 1)
50 mcr p15, 0, r0, c8, c7, 1 @ TLB invalidate MVA (was 1)
55 mcr p15, 0, ip, c7, c10, 4 @ data synchronization barrier
59 * v6wbi_flush_kern_tlb_range(start,end)
61 * Invalidate a range of kernel TLB entries
63 * - start - start address (may not be aligned)
64 * - end - end address (exclusive, may not be aligned)
66 ENTRY(v6wbi_flush_kern_tlb_range)
68 mcr p15, 0, r2, c7, c10, 4 @ drain write buffer
69 mov r0, r0, lsr #PAGE_SHIFT @ align address
70 mov r1, r1, lsr #PAGE_SHIFT
71 mov r0, r0, lsl #PAGE_SHIFT
72 mov r1, r1, lsl #PAGE_SHIFT
75 mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA
76 mcr p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA
78 mcr p15, 0, r0, c8, c7, 1 @ TLB invalidate MVA
83 mcr p15, 0, r2, c7, c10, 4 @ data synchronization barrier
84 mcr p15, 0, r2, c7, c5, 4 @ prefetch flush (isb)
89 /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */
90 define_tlb_functions v6wbi, v6wbi_tlb_flags