1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * linux/arch/arm/mm/tlbv4.S
4 *
5 * Copyright (C) 1997-2002 Russell King
6 *
7 * ARM architecture version 4 TLB handling fu
8 * These assume a split I/D TLBs, and no writ
9 *
10 * Processors: ARM720T
11 */
12 #include <linux/linkage.h>
13 #include <linux/init.h>
14 #include <linux/cfi_types.h>
15 #include <asm/assembler.h>
16 #include <asm/asm-offsets.h>
17 #include <asm/tlbflush.h>
18 #include "proc-macros.S"
19
20 .align 5
21 /*
22 * v4_flush_user_tlb_range(start, end, mm
23 *
24 * Invalidate a range of TLB entries in t
25 *
26 * - start - range start address
27 * - end - range end address
28 * - mm - mm_struct describing address
29 */
30 .align 5
31 SYM_TYPED_FUNC_START(v4_flush_user_tlb_range)
32 vma_vm_mm ip, r2
33 act_mm r3
34 eors r3, ip, r3
35 retne lr
36 .v4_flush_kern_tlb_range:
37 bic r0, r0, #0x0ff
38 bic r0, r0, #0xf00
39 1: mcr p15, 0, r0, c8, c7, 1
40 add r0, r0, #PAGE_SZ
41 cmp r0, r1
42 blo 1b
43 ret lr
44 SYM_FUNC_END(v4_flush_user_tlb_range)
45
46 /*
47 * v4_flush_kern_tlb_range(start, end)
48 *
49 * Invalidate a range of TLB entries in t
50 * address range.
51 *
52 * - start - virtual address (may not be
53 * - end - virtual address (may not be
54 */
55 #ifdef CONFIG_CFI_CLANG
56 SYM_TYPED_FUNC_START(v4_flush_kern_tlb_range)
57 b .v4_flush_kern_tlb_range
58 SYM_FUNC_END(v4_flush_kern_tlb_range)
59 #else
60 .globl v4_flush_kern_tlb_range
61 .equ v4_flush_kern_tlb_range, .v4_flush_kern_t
62 #endif
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