Root/arch/arm/mm/tlb-v3.S

1/*
2 * linux/arch/arm/mm/tlbv3.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 3 TLB handling functions.
11 *
12 * Processors: ARM610, ARM710.
13 */
14#include <linux/linkage.h>
15#include <linux/init.h>
16#include <asm/asm-offsets.h>
17#include <asm/tlbflush.h>
18#include "proc-macros.S"
19
20    .align 5
21/*
22 * v3_flush_user_tlb_range(start, end, mm)
23 *
24 * Invalidate a range of TLB entries in the specified address space.
25 *
26 * - start - range start address
27 * - end - range end address
28 * - mm - mm_struct describing address space
29 */
30    .align 5
31ENTRY(v3_flush_user_tlb_range)
32    vma_vm_mm r2, r2
33    act_mm r3 @ get current->active_mm
34    teq r2, r3 @ == mm ?
35    movne pc, lr @ no, we dont do anything
36ENTRY(v3_flush_kern_tlb_range)
37    bic r0, r0, #0x0ff
38    bic r0, r0, #0xf00
391: mcr p15, 0, r0, c6, c0, 0 @ invalidate TLB entry
40    add r0, r0, #PAGE_SZ
41    cmp r0, r1
42    blo 1b
43    mov pc, lr
44
45    __INITDATA
46
47    .type v3_tlb_fns, #object
48ENTRY(v3_tlb_fns)
49    .long v3_flush_user_tlb_range
50    .long v3_flush_kern_tlb_range
51    .long v3_tlb_flags
52    .size v3_tlb_fns, . - v3_tlb_fns
53

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