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 <linux/cfi_types.h>
13 #include <asm/asm-offsets.h>
14 #include <asm/assembler.h>
16 #include <asm/tlbflush.h>
17 #include "proc-macros.S"
24 * v6wbi_flush_user_tlb_range(start, end, vma)
26 * Invalidate a range of TLB entries in the specified address space.
28 * - start - start address (may not be aligned)
29 * - end - end address (exclusive, may not be aligned)
30 * - vma - vm_area_struct describing address range
33 * - the "Invalidate single entry" instruction will invalidate
34 * both the I and the D TLBs on Harvard-style TLBs
36 SYM_TYPED_FUNC_START(v6wbi_flush_user_tlb_range)
37 vma_vm_mm r3, r2 @ get vma->vm_mm
39 mmid r3, r3 @ get vm_mm->context.id
40 mcr p15, 0, ip, c7, c10, 4 @ drain write buffer
41 mov r0, r0, lsr #PAGE_SHIFT @ align address
42 mov r1, r1, lsr #PAGE_SHIFT
43 asid r3, r3 @ mask ASID
44 orr r0, r3, r0, lsl #PAGE_SHIFT @ Create initial MVA
45 mov r1, r1, lsl #PAGE_SHIFT
46 vma_vm_flags r2, r2 @ get vma->vm_flags
49 mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA (was 1)
50 tst r2, #VM_EXEC @ Executable area ?
51 mcrne p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA (was 1)
53 mcr p15, 0, r0, c8, c7, 1 @ TLB invalidate MVA (was 1)
58 mcr p15, 0, ip, c7, c10, 4 @ data synchronization barrier
60 SYM_FUNC_END(v6wbi_flush_user_tlb_range)
63 * v6wbi_flush_kern_tlb_range(start,end)
65 * Invalidate a range of kernel TLB entries
67 * - start - start address (may not be aligned)
68 * - end - end address (exclusive, may not be aligned)
70 SYM_TYPED_FUNC_START(v6wbi_flush_kern_tlb_range)
72 mcr p15, 0, r2, c7, c10, 4 @ drain write buffer
73 mov r0, r0, lsr #PAGE_SHIFT @ align address
74 mov r1, r1, lsr #PAGE_SHIFT
75 mov r0, r0, lsl #PAGE_SHIFT
76 mov r1, r1, lsl #PAGE_SHIFT
79 mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA
80 mcr p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA
82 mcr p15, 0, r0, c8, c7, 1 @ TLB invalidate MVA
87 mcr p15, 0, r2, c7, c10, 4 @ data synchronization barrier
88 mcr p15, 0, r2, c7, c5, 4 @ prefetch flush (isb)
90 SYM_FUNC_END(v6wbi_flush_kern_tlb_range)