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 
 */