Subversion Repositories HelenOS

Rev

Rev 4490 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
156 decky 1
/*
2071 jermar 2
 * Copyright (c) 2005 Martin Decky
156 decky 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
 
1726 decky 29
/** @addtogroup ppc32mm
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
2467 jermar 35
#ifndef KERN_ppc32_PAGE_H_
36
#define KERN_ppc32_PAGE_H_
156 decky 37
 
967 palkovsky 38
#include <arch/mm/frame.h>
39
 
765 jermar 40
#define PAGE_WIDTH  FRAME_WIDTH
156 decky 41
#define PAGE_SIZE   FRAME_SIZE
42
 
967 palkovsky 43
#ifdef KERNEL
44
 
957 decky 45
#ifndef __ASM__
1780 jermar 46
#   define KA2PA(x) (((uintptr_t) (x)) - 0x80000000)
47
#   define PA2KA(x) (((uintptr_t) (x)) + 0x80000000)
957 decky 48
#else
49
#   define KA2PA(x) ((x) - 0x80000000)
50
#   define PA2KA(x) ((x) + 0x80000000)
51
#endif
156 decky 52
 
1215 decky 53
/*
54
 * Implementation of generic 4-level page table interface,
55
 * the hardware Page Hash Table is used as cache.
56
 *
57
 * Page table layout:
58
 * - 32-bit virtual addressess
59
 * - Offset is 12 bits => pages are 4K long
60
 * - PTL0 has 1024 entries (10 bits)
61
 * - PTL1 is not used
62
 * - PTL2 is not used
63
 * - PLT3 has 1024 entries (10 bits)
64
 */
833 jermar 65
 
2467 jermar 66
/* Number of entries in each level. */
1215 decky 67
#define PTL0_ENTRIES_ARCH   1024
68
#define PTL1_ENTRIES_ARCH   0
69
#define PTL2_ENTRIES_ARCH   0
70
#define PTL3_ENTRIES_ARCH   1024
156 decky 71
 
2467 jermar 72
/* Page table sizes for each level. */
73
#define PTL0_SIZE_ARCH      ONE_FRAME
74
#define PTL1_SIZE_ARCH      0
75
#define PTL2_SIZE_ARCH      0
76
#define PTL3_SIZE_ARCH      ONE_FRAME
2465 jermar 77
 
2467 jermar 78
/* Macros calculating indices into page tables on each level. */
1215 decky 79
#define PTL0_INDEX_ARCH(vaddr)  (((vaddr) >> 22) & 0x3ff)
80
#define PTL1_INDEX_ARCH(vaddr)  0
81
#define PTL2_INDEX_ARCH(vaddr)  0
82
#define PTL3_INDEX_ARCH(vaddr)  (((vaddr) >> 12) & 0x3ff)
83
 
2467 jermar 84
/* Get PTE address accessors for each level. */
85
#define GET_PTL1_ADDRESS_ARCH(ptl0, i) \
86
    (((pte_t *) (ptl0))[(i)].pfn << 12)
87
#define GET_PTL2_ADDRESS_ARCH(ptl1, i) \
88
    (ptl1)
89
#define GET_PTL3_ADDRESS_ARCH(ptl2, i) \
90
    (ptl2)
91
#define GET_FRAME_ADDRESS_ARCH(ptl3, i) \
92
    (((pte_t *) (ptl3))[(i)].pfn << 12)
156 decky 93
 
2467 jermar 94
/* Set PTE address accessors for each level. */
1270 decky 95
#define SET_PTL0_ADDRESS_ARCH(ptl0)
2467 jermar 96
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) \
97
    (((pte_t *) (ptl0))[(i)].pfn = (a) >> 12)
156 decky 98
#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
99
#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
2467 jermar 100
#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) \
101
    (((pte_t *) (ptl3))[(i)].pfn = (a) >> 12)
156 decky 102
 
2467 jermar 103
/* Get PTE flags accessors for each level. */
104
#define GET_PTL1_FLAGS_ARCH(ptl0, i) \
4490 decky 105
    get_pt_flags((pte_t *) (ptl0), (size_t) (i))
2467 jermar 106
#define GET_PTL2_FLAGS_ARCH(ptl1, i) \
107
    PAGE_PRESENT
108
#define GET_PTL3_FLAGS_ARCH(ptl2, i) \
109
    PAGE_PRESENT
110
#define GET_FRAME_FLAGS_ARCH(ptl3, i) \
4490 decky 111
    get_pt_flags((pte_t *) (ptl3), (size_t) (i))
156 decky 112
 
2467 jermar 113
/* Set PTE flags accessors for each level. */
114
#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) \
4490 decky 115
    set_pt_flags((pte_t *) (ptl0), (size_t) (i), (x))
156 decky 116
#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
117
#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
2467 jermar 118
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) \
4490 decky 119
    set_pt_flags((pte_t *) (ptl3), (size_t) (i), (x))
156 decky 120
 
2467 jermar 121
/* Macros for querying the last-level PTEs. */
1780 jermar 122
#define PTE_VALID_ARCH(pte)         (*((uint32_t *) (pte)) != 0)
3830 decky 123
#define PTE_PRESENT_ARCH(pte)           ((pte)->present != 0)
1423 jermar 124
#define PTE_GET_FRAME_ARCH(pte)         ((pte)->pfn << 12)
125
#define PTE_WRITABLE_ARCH(pte)          1
126
#define PTE_EXECUTABLE_ARCH(pte)        1
833 jermar 127
 
957 decky 128
#ifndef __ASM__
129
 
2089 decky 130
#include <mm/mm.h>
131
#include <arch/interrupt.h>
957 decky 132
 
4490 decky 133
static inline int get_pt_flags(pte_t *pt, size_t i)
1215 decky 134
{
135
    pte_t *p = &pt[i];
136
 
3830 decky 137
    return (((!p->page_cache_disable) << PAGE_CACHEABLE_SHIFT) |
138
        ((!p->present) << PAGE_PRESENT_SHIFT) |
2467 jermar 139
        (1 << PAGE_USER_SHIFT) |
140
        (1 << PAGE_READ_SHIFT) |
141
        (1 << PAGE_WRITE_SHIFT) |
142
        (1 << PAGE_EXEC_SHIFT) |
3830 decky 143
        (p->global << PAGE_GLOBAL_SHIFT));
1215 decky 144
}
145
 
4490 decky 146
static inline void set_pt_flags(pte_t *pt, size_t i, int flags)
1215 decky 147
{
148
    pte_t *p = &pt[i];
149
 
3830 decky 150
    p->page_cache_disable = !(flags & PAGE_CACHEABLE);
151
    p->present = !(flags & PAGE_NOT_PRESENT);
152
    p->global = (flags & PAGE_GLOBAL) != 0;
1215 decky 153
    p->valid = 1;
154
}
155
 
156 decky 156
extern void page_arch_init(void);
157
 
957 decky 158
#endif /* __ASM__ */
159
 
967 palkovsky 160
#endif /* KERNEL */
161
 
156 decky 162
#endif
1702 cejka 163
 
1726 decky 164
/** @}
1702 cejka 165
 */