2 * linux/arch/arm/mm/tlbv4wb.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 TLB handling functions.
11 * These assume a split I/D TLBs w/o I TLB entry, with a write buffer.
13 * Processors: SA110 SA1100 SA1110
15 #include <linux/linkage.h>
16 #include <linux/init.h>
17 #include <asm/constants.h>
18 #include <asm/tlbflush.h>
19 #include "proc-macros.S"
23 * v4wb_flush_user_tlb_range(start, end, mm)
25 * Invalidate a range of TLB entries in the specified address space.
27 * - start - range start address
28 * - end - range end address
29 * - mm - mm_struct describing address space
32 ENTRY(v4wb_flush_user_tlb_range)
34 act_mm r3 @ get current->active_mm
35 eors r3, ip, r3 @ == mm ?
36 movne pc, lr @ no, we dont do anything
38 mcr p15, 0, r3, c7, c10, 4 @ drain WB
40 mcrne p15, 0, r3, c8, c5, 0 @ invalidate I TLB
43 1: mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
50 * v4_flush_kern_tlb_range(start, end)
52 * Invalidate a range of TLB entries in the specified kernel
55 * - start - virtual address (may not be aligned)
56 * - end - virtual address (may not be aligned)
58 ENTRY(v4wb_flush_kern_tlb_range)
60 mcr p15, 0, r3, c7, c10, 4 @ drain WB
63 mcr p15, 0, r3, c8, c5, 0 @ invalidate I TLB
64 1: mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
72 .type v4wb_tlb_fns, #object
74 .long v4wb_flush_user_tlb_range
75 .long v4wb_flush_kern_tlb_range
77 .size v4wb_tlb_fns, . - v4wb_tlb_fns