source: mainline/kernel/generic/src/mm/km.c@ 1a313f7

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 1a313f7 was c868e2d, checked in by Jakub Jermar <jakub@…>, 14 years ago

Add and apply page_mapping_make_global() on each span added to the
kernel non-identity. This ensures that the kernel non-identity will use
the same set of page tables in all address spaces.

  • Property mode set to 100644
File size: 2.6 KB
RevLine 
[622f409]1/*
2 * Copyright (c) 2011 Jakub Jermar
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 genericmm
30 * @{
31 */
32
33/**
34 * @file
35 * @brief Kernel virtual memory setup.
36 */
37
38#include <mm/km.h>
[55896b6]39#include <arch/mm/km.h>
[c868e2d]40#include <mm/page.h>
[55896b6]41#include <config.h>
[29938b2]42#include <typedefs.h>
[7c3e482]43#include <lib/ra.h>
44#include <debug.h>
45
46static ra_arena_t *km_ni_arena;
[622f409]47
48/** Architecture dependent setup of identity-mapped kernel memory. */
49void km_identity_init(void)
50{
[55896b6]51 km_identity_arch_init();
52 config.identity_configured = true;
[622f409]53}
54
55/** Architecture dependent setup of non-identity-mapped kernel memory. */
56void km_non_identity_init(void)
57{
[7c3e482]58 km_ni_arena = ra_arena_create();
59 ASSERT(km_ni_arena != NULL);
[55896b6]60 km_non_identity_arch_init();
61 config.non_identity_configured = true;
[622f409]62}
63
[1b478f6]64bool km_is_non_identity(uintptr_t addr)
65{
66 return km_is_non_identity_arch(addr);
67}
68
[29938b2]69void km_non_identity_span_add(uintptr_t base, size_t size)
70{
[7c3e482]71 bool span_added;
72
[c868e2d]73 page_mapping_make_global(base, size);
74
[7c3e482]75 span_added = ra_span_add(km_ni_arena, base, size);
76 ASSERT(span_added);
77}
78
79uintptr_t km_page_alloc(size_t size, size_t align)
80{
81 return ra_alloc(km_ni_arena, size, align);
[29938b2]82}
83
[7c3e482]84void km_page_free(uintptr_t page, size_t size)
85{
86 ra_free(km_ni_arena, page, size);
87}
88
89
[622f409]90/** @}
91 */
92
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