Subversion Repositories HelenOS-historic

Rev

Rev 1702 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
164 palkovsky 1
/*
349 jermar 2
 * Copyright (C) 2005 Ondrej Palkovsky
164 palkovsky 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
 
1780 jermar 29
/** @addtogroup amd64mm
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
1063 palkovsky 35
/** Paging on AMD64
36
 *
37
 * The space is divided in positive numbers - userspace and
38
 * negative numbers - kernel space. The 'negative' space starting
39
 * with 0xffff800000000000 and ending with 0xffffffff80000000
40
 * (-2GB) is identically mapped physical memory. The area
41
 * (0xffffffff80000000 ... 0xffffffffffffffff is again identically
42
 * mapped first 2GB.
43
 *
44
 * ATTENTION - PA2KA(KA2PA(x)) != x if 'x' is in kernel
45
 */
46
 
164 palkovsky 47
#ifndef __amd64_PAGE_H__
48
#define __amd64_PAGE_H__
49
 
808 palkovsky 50
#include <arch/mm/frame.h>
51
 
967 palkovsky 52
#define PAGE_WIDTH  FRAME_WIDTH
53
#define PAGE_SIZE   FRAME_SIZE
54
 
55
#ifdef KERNEL
56
 
194 palkovsky 57
#ifndef __ASM__
58
#  include <mm/page.h>
59
#  include <arch/types.h>
60
#endif
164 palkovsky 61
 
194 palkovsky 62
#ifndef __ASM__
1780 jermar 63
static inline uintptr_t ka2pa(uintptr_t x)
1063 palkovsky 64
{
65
    if (x > 0xffffffff80000000)
66
        return x - 0xffffffff80000000;
67
    else
68
        return x - 0xffff800000000000;
69
}
1780 jermar 70
# define KA2PA(x)      ka2pa((uintptr_t)x)
71
# define PA2KA_CODE(x)      (((uintptr_t) (x)) + 0xffffffff80000000)
72
# define PA2KA(x)      (((uintptr_t) (x)) + 0xffff800000000000)
194 palkovsky 73
#else
289 palkovsky 74
# define KA2PA(x)      ((x) - 0xffffffff80000000)
75
# define PA2KA(x)      ((x) + 0xffffffff80000000)
194 palkovsky 76
#endif
77
 
832 jermar 78
#define PTL0_ENTRIES_ARCH   512
79
#define PTL1_ENTRIES_ARCH   512
80
#define PTL2_ENTRIES_ARCH   512
81
#define PTL3_ENTRIES_ARCH   512
82
 
226 palkovsky 83
#define PTL0_INDEX_ARCH(vaddr)  (((vaddr)>>39)&0x1ff)
84
#define PTL1_INDEX_ARCH(vaddr)  (((vaddr)>>30)&0x1ff)
85
#define PTL2_INDEX_ARCH(vaddr)  (((vaddr)>>21)&0x1ff)
86
#define PTL3_INDEX_ARCH(vaddr)  (((vaddr)>>12)&0x1ff)
164 palkovsky 87
 
1780 jermar 88
#define GET_PTL1_ADDRESS_ARCH(ptl0, i)      ((pte_t *) ((((uint64_t) ((pte_t *)(ptl0))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl0))[(i)].addr_32_51)<<32 )))
89
#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      ((pte_t *) ((((uint64_t) ((pte_t *)(ptl1))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl1))[(i)].addr_32_51)<<32 )))
90
#define GET_PTL3_ADDRESS_ARCH(ptl2, i)      ((pte_t *) ((((uint64_t) ((pte_t *)(ptl2))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl2))[(i)].addr_32_51)<<32 )))
91
#define GET_FRAME_ADDRESS_ARCH(ptl3, i)     ((uintptr_t *) ((((uint64_t) ((pte_t *)(ptl3))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl3))[(i)].addr_32_51)<<32 )))
164 palkovsky 92
 
1780 jermar 93
#define SET_PTL0_ADDRESS_ARCH(ptl0)     (write_cr3((uintptr_t) (ptl0)))
226 palkovsky 94
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)   set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)
95
#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)       set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)
96
#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)       set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)
97
#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)  set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)
164 palkovsky 98
 
226 palkovsky 99
#define GET_PTL1_FLAGS_ARCH(ptl0, i)        get_pt_flags((pte_t *)(ptl0), (index_t)(i))
100
#define GET_PTL2_FLAGS_ARCH(ptl1, i)        get_pt_flags((pte_t *)(ptl1), (index_t)(i))
101
#define GET_PTL3_FLAGS_ARCH(ptl2, i)        get_pt_flags((pte_t *)(ptl2), (index_t)(i))
102
#define GET_FRAME_FLAGS_ARCH(ptl3, i)       get_pt_flags((pte_t *)(ptl3), (index_t)(i))
164 palkovsky 103
 
226 palkovsky 104
#define SET_PTL1_FLAGS_ARCH(ptl0, i, x)     set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
105
#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)         set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))
106
#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)         set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x))
107
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x)    set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
164 palkovsky 108
 
1780 jermar 109
#define PTE_VALID_ARCH(p)           (*((uint64_t *) (p)) != 0)
977 jermar 110
#define PTE_PRESENT_ARCH(p)         ((p)->present != 0)
1780 jermar 111
#define PTE_GET_FRAME_ARCH(p)           ((((uintptr_t)(p)->addr_12_31)<<12) | ((uintptr_t)(p)->addr_32_51<<32))
1423 jermar 112
#define PTE_WRITABLE_ARCH(p)            ((p)->writeable != 0)
113
#define PTE_EXECUTABLE_ARCH(p)          ((p)->no_execute == 0)
832 jermar 114
 
226 palkovsky 115
#ifndef __ASM__
164 palkovsky 116
 
1411 jermar 117
/* Page fault error codes. */
118
 
119
/** When bit on this position is 0, the page fault was caused by a not-present page. */
120
#define PFERR_CODE_P            (1<<0)  
121
 
122
/** When bit on this position is 1, the page fault was caused by a write. */
123
#define PFERR_CODE_RW           (1<<1)
124
 
125
/** When bit on this position is 1, the page fault was caused in user mode. */
126
#define PFERR_CODE_US           (1<<2)
127
 
128
/** When bit on this position is 1, a reserved bit was set in page directory. */
129
#define PFERR_CODE_RSVD         (1<<3)
130
 
131
/** When bit on this position os 1, the page fault was caused during instruction fecth. */
132
#define PFERR_CODE_ID       (1<<4)
133
 
831 jermar 134
/** Page Table Entry. */
226 palkovsky 135
struct page_specifier {
136
    unsigned present : 1;
137
    unsigned writeable : 1;
138
    unsigned uaccessible : 1;
139
    unsigned page_write_through : 1;
140
    unsigned page_cache_disable : 1;
141
    unsigned accessed : 1;
142
    unsigned dirty : 1;
143
    unsigned unused: 1;
144
    unsigned global : 1;
831 jermar 145
    unsigned soft_valid : 1;        /**< Valid content even if present bit is cleared. */
146
    unsigned avl : 2;
226 palkovsky 147
    unsigned addr_12_31 : 30;
148
    unsigned addr_32_51 : 21;
149
    unsigned no_execute : 1;
150
} __attribute__ ((packed));
151
 
152
static inline int get_pt_flags(pte_t *pt, index_t i)
153
{
154
    pte_t *p = &pt[i];
155
 
156
    return (
157
        (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT |
158
        (!p->present)<<PAGE_PRESENT_SHIFT |
159
        p->uaccessible<<PAGE_USER_SHIFT |
160
        1<<PAGE_READ_SHIFT |
161
        p->writeable<<PAGE_WRITE_SHIFT |
825 jermar 162
        (!p->no_execute)<<PAGE_EXEC_SHIFT |
163
        p->global<<PAGE_GLOBAL_SHIFT
226 palkovsky 164
    );
165
}
166
 
1780 jermar 167
static inline void set_pt_addr(pte_t *pt, index_t i, uintptr_t a)
226 palkovsky 168
{
169
    pte_t *p = &pt[i];
170
 
171
    p->addr_12_31 = (a >> 12) & 0xfffff;
172
    p->addr_32_51 = a >> 32;
173
}
174
 
175
static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
176
{
177
    pte_t *p = &pt[i];
178
 
179
    p->page_cache_disable = !(flags & PAGE_CACHEABLE);
180
    p->present = !(flags & PAGE_NOT_PRESENT);
181
    p->uaccessible = (flags & PAGE_USER) != 0;
182
    p->writeable = (flags & PAGE_WRITE) != 0;
183
    p->no_execute = (flags & PAGE_EXEC) == 0;
825 jermar 184
    p->global = (flags & PAGE_GLOBAL) != 0;
831 jermar 185
 
186
    /*
187
     * Ensure that there is at least one bit set even if the present bit is cleared.
188
     */
189
    p->soft_valid = 1;
226 palkovsky 190
}
191
 
164 palkovsky 192
extern void page_arch_init(void);
193
 
967 palkovsky 194
#endif /* __ASM__ */
164 palkovsky 195
 
967 palkovsky 196
#endif /* KERNEL */
197
 
164 palkovsky 198
#endif
1702 cejka 199
 
1780 jermar 200
/** @}
1702 cejka 201
 */