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 <asm/assembler.h>
15 #include <asm/asm-offsets.h>
16 #include <asm/tlbflush.h>
17 #include "proc-macros.S"
20 * v4wb_flush_user_tlb_range(start, end, mm)
22 * Invalidate a range of TLB entries in the specified address space.
24 * - start - range start address
25 * - end - range end address
26 * - mm - mm_struct describing address space
29 ENTRY(v4wbi_flush_user_tlb_range)
31 act_mm r3 @ get current->active_mm
32 eors r3, ip, r3 @ == mm ?
33 retne lr @ no, we dont do anything
35 mcr p15, 0, r3, c7, c10, 4 @ drain WB
40 mcrne p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry
41 mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
47 ENTRY(v4wbi_flush_kern_tlb_range)
49 mcr p15, 0, r3, c7, c10, 4 @ drain WB
52 1: mcr p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry
53 mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
61 /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */
62 define_tlb_functions v4wbi, v4wbi_tlb_flags