Subversion Repositories HelenOS-historic

Rev

Rev 1411 | Rev 1705 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
219 palkovsky 1
/*
2
 * Copyright (C) 2001-2004 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
 
540 jermar 29
#include <arch/mm/page.h>
684 jermar 30
#include <genarch/mm/page_pt.h>
540 jermar 31
#include <arch/mm/frame.h>
219 palkovsky 32
#include <mm/page.h>
226 palkovsky 33
#include <mm/frame.h>
755 jermar 34
#include <mm/as.h>
226 palkovsky 35
#include <arch/interrupt.h>
36
#include <arch/asm.h>
37
#include <config.h>
38
#include <memstr.h>
576 palkovsky 39
#include <interrupt.h>
1051 jermar 40
#include <print.h>
41
#include <panic.h>
1063 palkovsky 42
#include <align.h>
226 palkovsky 43
 
1051 jermar 44
/* Definitions for identity page mapper */
45
pte_t helper_ptl1[512] __attribute__((aligned (PAGE_SIZE)));
46
pte_t helper_ptl2[512] __attribute__((aligned (PAGE_SIZE)));
47
pte_t helper_ptl3[512] __attribute__((aligned (PAGE_SIZE)));
48
extern pte_t ptl_0; /* From boot.S */
49
 
50
#define PTL1_PRESENT(ptl0, page) (!(GET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
51
#define PTL2_PRESENT(ptl1, page) (!(GET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
52
#define PTL3_PRESENT(ptl2, page) (!(GET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
53
 
54
#define PTL1_ADDR(ptl0, page) ((pte_t *)PA2KA(GET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page))))
55
#define PTL2_ADDR(ptl1, page) ((pte_t *)PA2KA(GET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page))))
56
#define PTL3_ADDR(ptl2, page) ((pte_t *)PA2KA(GET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page))))
57
 
58
#define SETUP_PTL1(ptl0, page, tgt)  {  \
59
    SET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
60
        SET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
61
    }
62
#define SETUP_PTL2(ptl1, page, tgt)  {  \
63
    SET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
64
        SET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
65
    }
66
#define SETUP_PTL3(ptl2, page, tgt)  {  \
67
    SET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
68
        SET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
69
    }
70
#define SETUP_FRAME(ptl3, page, tgt)  { \
71
    SET_FRAME_ADDRESS_ARCH(ptl3, PTL3_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
72
        SET_FRAME_FLAGS_ARCH(ptl3, PTL3_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
73
    }
1382 decky 74
 
75
 
219 palkovsky 76
void page_arch_init(void)
77
{
540 jermar 78
    __address cur;
1063 palkovsky 79
    int i;
80
    int identity_flags = PAGE_CACHEABLE | PAGE_EXEC | PAGE_GLOBAL;
226 palkovsky 81
 
82
    if (config.cpu_active == 1) {
793 jermar 83
        page_mapping_operations = &pt_mapping_operations;
814 palkovsky 84
 
226 palkovsky 85
        /*
86
         * PA2KA(identity) mapping for all frames.
87
         */
540 jermar 88
        for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
1063 palkovsky 89
            /* Standard identity mapping */
1064 palkovsky 90
            page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, identity_flags);
226 palkovsky 91
        }
1063 palkovsky 92
        /* Upper kernel mapping
93
         * - from zero to top of kernel (include bottom addresses
94
         *   because some are needed for init )
95
         */
96
        for (cur = PA2KA_CODE(0); cur < config.base+config.kernel_size; cur += FRAME_SIZE) {
97
            page_mapping_insert(AS_KERNEL, cur, KA2PA(cur), identity_flags);
98
        }
99
        for (i=0; i < init.cnt; i++) {
100
            for (cur=init.tasks[i].addr;cur < init.tasks[i].size; cur += FRAME_SIZE) {
101
                page_mapping_insert(AS_KERNEL, PA2KA_CODE(KA2PA(cur)), KA2PA(cur), identity_flags);
102
            }
103
        }
104
 
799 palkovsky 105
        exc_register(14, "page_fault", (iroutine)page_fault);
756 jermar 106
        write_cr3((__address) AS_KERNEL->page_table);
226 palkovsky 107
    }
108
    else {
756 jermar 109
        write_cr3((__address) AS_KERNEL->page_table);
226 palkovsky 110
    }
219 palkovsky 111
}
1051 jermar 112
 
1382 decky 113
 
1051 jermar 114
/** Identity page mapper
115
 *
116
 * We need to map whole physical memory identically before the page subsystem
117
 * is initializaed. This thing clears page table and fills in the specific
118
 * items.
119
 */
120
void ident_page_fault(int n, istate_t *istate)
121
{
122
    __address page;
123
    static __address oldpage = 0;
124
    pte_t *aptl_1, *aptl_2, *aptl_3;
125
 
126
    page = read_cr2();
127
    if (oldpage) {
128
        /* Unmap old address */
129
        aptl_1 = PTL1_ADDR(&ptl_0, oldpage);
130
        aptl_2 = PTL2_ADDR(aptl_1, oldpage);
131
        aptl_3 = PTL3_ADDR(aptl_2, oldpage);
132
 
133
        SET_FRAME_FLAGS_ARCH(aptl_3, PTL3_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
1064 palkovsky 134
        if (KA2PA(aptl_3) == KA2PA(helper_ptl3))
1051 jermar 135
            SET_PTL3_FLAGS_ARCH(aptl_2, PTL2_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
1064 palkovsky 136
        if (KA2PA(aptl_2) == KA2PA(helper_ptl2))
1051 jermar 137
            SET_PTL2_FLAGS_ARCH(aptl_1, PTL1_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
1064 palkovsky 138
        if (KA2PA(aptl_1) == KA2PA(helper_ptl1))
1051 jermar 139
            SET_PTL1_FLAGS_ARCH(&ptl_0, PTL0_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
140
    }
141
    if (PTL1_PRESENT(&ptl_0, page))
142
        aptl_1 = PTL1_ADDR(&ptl_0, page);
143
    else {
144
        SETUP_PTL1(&ptl_0, page, helper_ptl1);
145
        aptl_1 = helper_ptl1;
146
    }
147
 
148
    if (PTL2_PRESENT(aptl_1, page))
149
        aptl_2 = PTL2_ADDR(aptl_1, page);
150
    else {
151
        SETUP_PTL2(aptl_1, page, helper_ptl2);
152
        aptl_2 = helper_ptl2;
153
    }
154
 
155
    if (PTL3_PRESENT(aptl_2, page))
156
        aptl_3 = PTL3_ADDR(aptl_2, page);
157
    else {
158
        SETUP_PTL3(aptl_2, page, helper_ptl3);
159
        aptl_3 = helper_ptl3;
160
    }
161
 
162
    SETUP_FRAME(aptl_3, page, page);
163
 
164
    oldpage = page;
165
}
166
 
1382 decky 167
 
1051 jermar 168
void page_fault(int n, istate_t *istate)
169
{
170
    __address page;
1411 jermar 171
    pf_access_t access;
1051 jermar 172
 
173
    page = read_cr2();
1411 jermar 174
 
175
    if (istate->error_word & PFERR_CODE_RSVD)
176
        panic("Reserved bit set in page table entry.\n");
177
 
178
    if (istate->error_word & PFERR_CODE_RW)
179
        access = PF_ACCESS_WRITE;
180
    else if (istate->error_word & PFERR_CODE_ID)
181
        access = PF_ACCESS_EXEC;
182
    else
183
        access = PF_ACCESS_READ;
184
 
185
    if (as_page_fault(page, access, istate) == AS_PF_FAULT) {
1595 palkovsky 186
        fault_if_from_uspace(istate, "Page fault: %#x", page);
187
 
1051 jermar 188
        print_info_errcode(n, istate);
1212 palkovsky 189
        printf("Page fault address: %llX\n", page);
1051 jermar 190
        panic("page fault\n");
191
    }
192
}
1382 decky 193
 
194
 
195
__address hw_map(__address physaddr, size_t size)
196
{
197
    if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
198
        panic("Unable to map physical memory %p (%d bytes)", physaddr, size)
199
 
200
    __address virtaddr = PA2KA(last_frame);
201
    pfn_t i;
202
    for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
203
        page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE);
204
 
205
    last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
206
 
207
    return virtaddr;
208
}