1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * linux/arch/arm/mm/tlb-v6.S
4 *
5 * Copyright (C) 1997-2002 Russell King
6 *
7 * ARM architecture version 6 TLB handling fu
8 * These assume a split I/D TLB.
9 */
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>
15 #include <asm/page.h>
16 #include <asm/tlbflush.h>
17 #include "proc-macros.S"
18
19 #define HARVARD_TLB
20
21 .arch armv6
22
23 /*
24 * v6wbi_flush_user_tlb_range(start, end,
25 *
26 * Invalidate a range of TLB entries in t
27 *
28 * - start - start address (may not be al
29 * - end - end address (exclusive, may
30 * - vma - vm_area_struct describing ad
31 *
32 * It is assumed that:
33 * - the "Invalidate single entry" instru
34 * both the I and the D TLBs on Harvard
35 */
36 SYM_TYPED_FUNC_START(v6wbi_flush_user_tlb_rang
37 vma_vm_mm r3, r2
38 mov ip, #0
39 mmid r3, r3
40 mcr p15, 0, ip, c7, c10, 4
41 mov r0, r0, lsr #PAGE_SHIFT
42 mov r1, r1, lsr #PAGE_SHIFT
43 asid r3, r3
44 orr r0, r3, r0, lsl #PAGE_SHIFT
45 mov r1, r1, lsl #PAGE_SHIFT
46 vma_vm_flags r2, r2
47 1:
48 #ifdef HARVARD_TLB
49 mcr p15, 0, r0, c8, c6, 1
50 tst r2, #VM_EXEC
51 mcrne p15, 0, r0, c8, c5, 1
52 #else
53 mcr p15, 0, r0, c8, c7, 1
54 #endif
55 add r0, r0, #PAGE_SZ
56 cmp r0, r1
57 blo 1b
58 mcr p15, 0, ip, c7, c10, 4
59 ret lr
60 SYM_FUNC_END(v6wbi_flush_user_tlb_range)
61
62 /*
63 * v6wbi_flush_kern_tlb_range(start,end)
64 *
65 * Invalidate a range of kernel TLB entri
66 *
67 * - start - start address (may not be al
68 * - end - end address (exclusive, may
69 */
70 SYM_TYPED_FUNC_START(v6wbi_flush_kern_tlb_rang
71 mov r2, #0
72 mcr p15, 0, r2, c7, c10, 4
73 mov r0, r0, lsr #PAGE_SHIFT
74 mov r1, r1, lsr #PAGE_SHIFT
75 mov r0, r0, lsl #PAGE_SHIFT
76 mov r1, r1, lsl #PAGE_SHIFT
77 1:
78 #ifdef HARVARD_TLB
79 mcr p15, 0, r0, c8, c6, 1
80 mcr p15, 0, r0, c8, c5, 1
81 #else
82 mcr p15, 0, r0, c8, c7, 1
83 #endif
84 add r0, r0, #PAGE_SZ
85 cmp r0, r1
86 blo 1b
87 mcr p15, 0, r2, c7, c10, 4
88 mcr p15, 0, r2, c7, c5, 4
89 ret lr
90 SYM_FUNC_END(v6wbi_flush_kern_tlb_range)
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.