1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * linux/arch/arm/mm/tlb-fa.S
4 *
5 * Copyright (C) 2005 Faraday Corp.
6 * Copyright (C) 2008-2009 Paulius Zaleckas <p
7 *
8 * Based on tlb-v4wbi.S:
9 * Copyright (C) 1997-2002 Russell King
10 *
11 * ARM architecture version 4, Faraday variat
12 * This assume an unified TLBs, with a write
13 *
14 * Processors: FA520 FA526 FA626
15 */
16 #include <linux/linkage.h>
17 #include <linux/init.h>
18 #include <linux/cfi_types.h>
19 #include <asm/assembler.h>
20 #include <asm/asm-offsets.h>
21 #include <asm/tlbflush.h>
22 #include "proc-macros.S"
23
24
25 /*
26 * flush_user_tlb_range(start, end, mm)
27 *
28 * Invalidate a range of TLB entries in t
29 *
30 * - start - range start address
31 * - end - range end address
32 * - mm - mm_struct describing address
33 */
34 .align 4
35 SYM_TYPED_FUNC_START(fa_flush_user_tlb_range)
36 vma_vm_mm ip, r2
37 act_mm r3
38 eors r3, ip, r3
39 retne lr
40 mov r3, #0
41 mcr p15, 0, r3, c7, c10, 4
42 bic r0, r0, #0x0ff
43 bic r0, r0, #0xf00
44 1: mcr p15, 0, r0, c8, c7, 1
45 add r0, r0, #PAGE_SZ
46 cmp r0, r1
47 blo 1b
48 mcr p15, 0, r3, c7, c10, 4
49 ret lr
50 SYM_FUNC_END(fa_flush_user_tlb_range)
51
52
53 SYM_TYPED_FUNC_START(fa_flush_kern_tlb_range)
54 mov r3, #0
55 mcr p15, 0, r3, c7, c10, 4
56 bic r0, r0, #0x0ff
57 bic r0, r0, #0xf00
58 1: mcr p15, 0, r0, c8, c7, 1
59 add r0, r0, #PAGE_SZ
60 cmp r0, r1
61 blo 1b
62 mcr p15, 0, r3, c7, c10, 4
63 mcr p15, 0, r3, c7, c5, 4
64 ret lr
65 SYM_FUNC_END(fa_flush_kern_tlb_range)
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