Subversion Repositories HelenOS-historic

Rev

Rev 1374 | Rev 1702 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
156 decky 1
/*
159 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
 
342 jermar 29
#ifndef __ppc32_PAGE_H__
30
#define __ppc32_PAGE_H__
156 decky 31
 
967 palkovsky 32
#include <arch/mm/frame.h>
33
 
765 jermar 34
#define PAGE_WIDTH  FRAME_WIDTH
156 decky 35
#define PAGE_SIZE   FRAME_SIZE
36
 
967 palkovsky 37
#ifdef KERNEL
38
 
957 decky 39
#ifndef __ASM__
40
#   define KA2PA(x) (((__address) (x)) - 0x80000000)
41
#   define PA2KA(x) (((__address) (x)) + 0x80000000)
42
#else
43
#   define KA2PA(x) ((x) - 0x80000000)
44
#   define PA2KA(x) ((x) + 0x80000000)
45
#endif
156 decky 46
 
1215 decky 47
/*
48
 * Implementation of generic 4-level page table interface,
49
 * the hardware Page Hash Table is used as cache.
50
 *
51
 * Page table layout:
52
 * - 32-bit virtual addressess
53
 * - Offset is 12 bits => pages are 4K long
54
 * - PTL0 has 1024 entries (10 bits)
55
 * - PTL1 is not used
56
 * - PTL2 is not used
57
 * - PLT3 has 1024 entries (10 bits)
58
 */
833 jermar 59
 
1215 decky 60
#define PTL0_ENTRIES_ARCH   1024
61
#define PTL1_ENTRIES_ARCH   0
62
#define PTL2_ENTRIES_ARCH   0
63
#define PTL3_ENTRIES_ARCH   1024
156 decky 64
 
1215 decky 65
#define PTL0_INDEX_ARCH(vaddr)  (((vaddr) >> 22) & 0x3ff)
66
#define PTL1_INDEX_ARCH(vaddr)  0
67
#define PTL2_INDEX_ARCH(vaddr)  0
68
#define PTL3_INDEX_ARCH(vaddr)  (((vaddr) >> 12) & 0x3ff)
69
 
70
#define GET_PTL1_ADDRESS_ARCH(ptl0, i)      (((pte_t *) (ptl0))[(i)].pfn << 12)
71
#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      (ptl1)
72
#define GET_PTL3_ADDRESS_ARCH(ptl2, i)      (ptl2)
73
#define GET_FRAME_ADDRESS_ARCH(ptl3, i)     (((pte_t *) (ptl3))[(i)].pfn << 12)
156 decky 74
 
1270 decky 75
#define SET_PTL0_ADDRESS_ARCH(ptl0)
1215 decky 76
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)   (((pte_t *) (ptl0))[(i)].pfn = (a) >> 12)
156 decky 77
#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
78
#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
1215 decky 79
#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)  (((pte_t *) (ptl3))[(i)].pfn = (a) >> 12)
156 decky 80
 
1215 decky 81
#define GET_PTL1_FLAGS_ARCH(ptl0, i)        get_pt_flags((pte_t *) (ptl0), (index_t) (i))
82
#define GET_PTL2_FLAGS_ARCH(ptl1, i)        PAGE_PRESENT
83
#define GET_PTL3_FLAGS_ARCH(ptl2, i)        PAGE_PRESENT
84
#define GET_FRAME_FLAGS_ARCH(ptl3, i)       get_pt_flags((pte_t *) (ptl3), (index_t) (i))
156 decky 85
 
1215 decky 86
#define SET_PTL1_FLAGS_ARCH(ptl0, i, x)     set_pt_flags((pte_t *) (ptl0), (index_t) (i), (x))
156 decky 87
#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
88
#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
1215 decky 89
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x)    set_pt_flags((pte_t *) (ptl3), (index_t) (i), (x))
156 decky 90
 
1215 decky 91
#define PTE_VALID_ARCH(pte)         (*((__u32 *) (pte)) != 0)
1423 jermar 92
#define PTE_PRESENT_ARCH(pte)           ((pte)->p != 0)
93
#define PTE_GET_FRAME_ARCH(pte)         ((pte)->pfn << 12)
94
#define PTE_WRITABLE_ARCH(pte)          1
95
#define PTE_EXECUTABLE_ARCH(pte)        1
833 jermar 96
 
957 decky 97
#ifndef __ASM__
98
 
99
#include <mm/page.h>
100
#include <arch/mm/frame.h>
101
#include <arch/types.h>
102
 
1215 decky 103
static inline int get_pt_flags(pte_t *pt, index_t i)
104
{
105
    pte_t *p = &pt[i];
106
 
107
    return (
108
        (1 << PAGE_CACHEABLE_SHIFT) |
109
        ((!p->p) << PAGE_PRESENT_SHIFT) |
110
        (1 << PAGE_USER_SHIFT) |
111
        (1 << PAGE_READ_SHIFT) |
112
        (1 << PAGE_WRITE_SHIFT) |
1374 decky 113
        (1 << PAGE_EXEC_SHIFT) |
114
        (p->g << PAGE_GLOBAL_SHIFT)
1215 decky 115
    );
116
}
117
 
118
static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
119
{
120
    pte_t *p = &pt[i];
121
 
122
    p->p = !(flags & PAGE_NOT_PRESENT);
1374 decky 123
    p->g = (flags & PAGE_GLOBAL) != 0;
1215 decky 124
    p->valid = 1;
125
}
126
 
156 decky 127
extern void page_arch_init(void);
128
 
1374 decky 129
#define PHT_BITS    16
130
#define PHT_ORDER   4
131
 
132
typedef struct {
133
    unsigned v : 1;          /**< Valid */
134
    unsigned vsid : 24;      /**< Virtual Segment ID */
135
    unsigned h : 1;          /**< Primary/secondary hash */
136
    unsigned api : 6;        /**< Abbreviated Page Index */
137
    unsigned rpn : 20;       /**< Real Page Number */
138
    unsigned reserved0 : 3;
139
    unsigned r : 1;          /**< Reference */
140
    unsigned c : 1;          /**< Change */
141
    unsigned wimg : 4;       /**< Access control */
142
    unsigned reserved1 : 1;
143
    unsigned pp : 2;         /**< Page protection */
144
} phte_t;
145
 
146
extern void pht_refill(bool data, istate_t *istate);
147
extern void pht_init(void);
148
 
957 decky 149
#endif /* __ASM__ */
150
 
967 palkovsky 151
#endif /* KERNEL */
152
 
156 decky 153
#endif