1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * linux/arch/arm/mm/tlbv4wbi.S
5 * Copyright (C) 1997-2002 Russell King
7 * ARM architecture version 4 and version 5 TLB handling functions.
8 * These assume a split I/D TLBs, with a write buffer.
10 * Processors: ARM920 ARM922 ARM925 ARM926 XScale
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"
21 * v4wb_flush_user_tlb_range(start, end, mm)
23 * Invalidate a range of TLB entries in the specified address space.
25 * - start - range start address
26 * - end - range end address
27 * - mm - mm_struct describing address space
30 SYM_TYPED_FUNC_START(v4wbi_flush_user_tlb_range)
32 act_mm r3 @ get current->active_mm
33 eors r3, ip, r3 @ == mm ?
34 retne lr @ no, we dont do anything
36 mcr p15, 0, r3, c7, c10, 4 @ drain WB
41 mcrne p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry
42 mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
47 SYM_FUNC_END(v4wbi_flush_user_tlb_range)
49 SYM_TYPED_FUNC_START(v4wbi_flush_kern_tlb_range)
51 mcr p15, 0, r3, c7, c10, 4 @ drain WB
54 1: mcr p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry
55 mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
60 SYM_FUNC_END(v4wbi_flush_kern_tlb_range)