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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/arch/arm/mm/tlbv4.S
3 *
4 * Copyright (C) 1997-2002 Russell King
5 *
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.
9 *
10 * ARM architecture version 4 TLB handling functions.
11 * These assume a split I/D TLBs, and no write buffer.
12 *
13 * Processors: ARM720T
14 */
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"
20
21 .align 5
22/*
23 * v4_flush_user_tlb_range(start, end, mm)
24 *
25 * Invalidate a range of TLB entries in the specified user address space.
26 *
27 * - start - range start address
28 * - end - range end address
29 * - mm - mm_struct describing address space
30 */
31 .align 5
32ENTRY(v4_flush_user_tlb_range)
33 vma_vm_mm ip, r2
34 act_mm r3 @ get current->active_mm
35 eors r3, ip, r3 @ == mm ?
36 movne pc, lr @ no, we dont do anything
37.v4_flush_kern_tlb_range:
38 bic r0, r0, #0x0ff
39 bic r0, r0, #0xf00
401: mcr p15, 0, r0, c8, c7, 1 @ invalidate TLB entry
41 add r0, r0, #PAGE_SZ
42 cmp r0, r1
43 blo 1b
44 mov pc, lr
45
46/*
47 * v4_flush_kern_tlb_range(start, end)
48 *
49 * Invalidate a range of TLB entries in the specified kernel
50 * address range.
51 *
52 * - start - virtual address (may not be aligned)
53 * - end - virtual address (may not be aligned)
54 */
55.globl v4_flush_kern_tlb_range
56.equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range
57
58 __INITDATA
59
60 .type v4_tlb_fns, #object
61ENTRY(v4_tlb_fns)
62 .long v4_flush_user_tlb_range
63 .long v4_flush_kern_tlb_range
64 .long v4_tlb_flags
65 .size v4_tlb_fns, . - v4_tlb_fns