2 * linux/arch/arm/mm/tlb-fa.S
4 * Copyright (C) 2005 Faraday Corp.
5 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
7 * Based on tlb-v4wbi.S:
8 * Copyright (C) 1997-2002 Russell King
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * ARM architecture version 4, Faraday variation.
15 * This assume an unified TLBs, with a write buffer, and branch target buffer (BTB)
17 * Processors: FA520 FA526 FA626
19 #include <linux/linkage.h>
20 #include <linux/init.h>
21 #include <asm/asm-offsets.h>
22 #include <asm/tlbflush.h>
23 #include "proc-macros.S"
27 * flush_user_tlb_range(start, end, mm)
29 * Invalidate a range of TLB entries in the specified address space.
31 * - start - range start address
32 * - end - range end address
33 * - mm - mm_struct describing address space
36 ENTRY(fa_flush_user_tlb_range)
38 act_mm r3 @ get current->active_mm
39 eors r3, ip, r3 @ == mm ?
40 movne pc, lr @ no, we dont do anything
42 mcr p15, 0, r3, c7, c10, 4 @ drain WB
45 1: mcr p15, 0, r0, c8, c7, 1 @ invalidate UTLB entry
49 mcr p15, 0, r3, c7, c5, 6 @ invalidate BTB
50 mcr p15, 0, r3, c7, c10, 4 @ data write barrier
54 ENTRY(fa_flush_kern_tlb_range)
56 mcr p15, 0, r3, c7, c10, 4 @ drain WB
59 1: mcr p15, 0, r0, c8, c7, 1 @ invalidate UTLB entry
63 mcr p15, 0, r3, c7, c5, 6 @ invalidate BTB
64 mcr p15, 0, r3, c7, c10, 4 @ data write barrier
65 mcr p15, 0, r3, c7, c5, 4 @ prefetch flush
70 .type fa_tlb_fns, #object
72 .long fa_flush_user_tlb_range
73 .long fa_flush_kern_tlb_range
75 .size fa_tlb_fns, . - fa_tlb_fns