Subversion Repositories HelenOS

Rev

Rev 3022 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2163 jancik 1
/*
2238 kebrt 2
 * Copyright (c) 2007 Michal Kebrt
2163 jancik 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
/** @addtogroup arm32mm
30
 * @{
31
 */
32
/** @file
2410 stepan 33
 *  @brief TLB related functions.
2163 jancik 34
 */
35
 
36
#include <mm/tlb.h>
37
#include <arch/mm/asid.h>
38
#include <arch/asm.h>
39
#include <arch/types.h>
40
#include <arch/mm/page.h>
41
 
2415 kebrt 42
/** Invalidate all entries in TLB.
43
 *
44
 * @note See ARM Architecture reference section 3.7.7 for details.
45
 */
2163 jancik 46
void tlb_invalidate_all(void)
47
{
2238 kebrt 48
    asm volatile (
2163 jancik 49
        "eor r1, r1\n"
2415 kebrt 50
        "mcr p15, 0, r1, c8, c7, 0\n"
4055 trochtova 51
        ::: "r1"
2163 jancik 52
    );
53
}
54
 
55
/** Invalidate all entries in TLB that belong to specified address space.
56
 *
2415 kebrt 57
 * @param asid Ignored as the ARM architecture doesn't support ASIDs.
2163 jancik 58
 */
59
void tlb_invalidate_asid(asid_t asid)
60
{
61
    tlb_invalidate_all();
62
}
63
 
64
/** Invalidate single entry in TLB
2361 jancik 65
 *
2163 jancik 66
 * @param page Virtual adress of the page
67
 */
2238 kebrt 68
static inline void invalidate_page(uintptr_t page)
2163 jancik 69
{
70
    asm volatile (
4055 trochtova 71
        "mcr p15, 0, %[page], c8, c7, 1\n"
72
        :: [page] "r" (page)
2199 jancik 73
    );
2163 jancik 74
}
75
 
2464 jermar 76
/** Invalidate TLB entries for specified page range belonging to specified
77
 * address space.
2163 jancik 78
 *
2415 kebrt 79
 * @param asid Ignored as the ARM architecture doesn't support it.
2163 jancik 80
 * @param page Address of the first page whose entry is to be invalidated.
81
 * @param cnt Number of entries to invalidate.
82
 */
4055 trochtova 83
void tlb_invalidate_pages(asid_t asid __attribute__((unused)), uintptr_t page, count_t cnt)
2163 jancik 84
{
85
    unsigned int i;
86
 
87
    for (i = 0; i < cnt; i++)
2238 kebrt 88
        invalidate_page(page + i * PAGE_SIZE);
2163 jancik 89
}
90
 
4055 trochtova 91
void tlb_arch_init(void)
92
{
93
}
94
 
95
void tlb_print(void)
96
{
97
}
98
 
2163 jancik 99
/** @}
100
 */