2 * linux/arch/arm/mm/tlbv4wbi.S
4 * Copyright (C) 1997-2002 Russell King
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * ARM architecture version 4 and version 5 TLB handling functions.
11 * These assume a split I/D TLBs, with a write buffer.
13 * Processors: ARM920 ARM922 ARM925 ARM926 XScale
15 #include <linux/linkage.h>
16 #include <linux/init.h>
17 #include <asm/asm-offsets.h>
18 #include <asm/tlbflush.h>
19 #include "proc-macros.S"
22 * v4wb_flush_user_tlb_range(start, end, mm)
24 * Invalidate a range of TLB entries in the specified address space.
26 * - start - range start address
27 * - end - range end address
28 * - mm - mm_struct describing address space
31 ENTRY(v4wbi_flush_user_tlb_range)
33 act_mm r3 @ get current->active_mm
34 eors r3, ip, r3 @ == mm ?
35 movne pc, lr @ no, we dont do anything
37 mcr p15, 0, r3, c7, c10, 4 @ drain WB
42 mcrne p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry
43 mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
49 ENTRY(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
63 .type v4wbi_tlb_fns, #object
65 .long v4wbi_flush_user_tlb_range
66 .long v4wbi_flush_kern_tlb_range
68 .size v4wbi_tlb_fns, . - v4wbi_tlb_fns