1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/sys/vfs/vfs_init.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* COPYRIGHT International Business Machines Corp. 2011,2014 */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
/**
* @file vfs_init.C
* @brief function definitions for funtions used to initialize modules
*/
#include <sys/vfs.h>
#include <kernel/console.H>
#include <limits.h>
#include <sys/mm.h>
#include <util/align.H>
VfsSystemModule VFS_MODULES[VFS_MODULE_MAX] =
{{{VFS_MODULE_MAX,0},NULL,NULL,NULL,NULL,NULL,0}};
uint64_t VFS_LAST_ADDRESS;
int vfs_module_perms(VfsSystemModule* module)
{
int rc = 0;
uint64_t memsize = ALIGN_PAGE(module->byte_count);
uint64_t textsize= (uint64_t)module->data - (uint64_t)module->text;
uint64_t datasize = memsize - textsize;
printkd("%s text=%p:%lx data=%p:%lx\n",
module->module,
module->text,
textsize,
module->data,
datasize);
if(textsize != 0)
{
// Mark text pages(s) as executable
rc |= mm_set_permission(module->text,
textsize,
EXECUTABLE);
// Mark data pages(s) as normal
rc |= mm_set_permission(module->data,
datasize,
WRITABLE);
}
else // ro data module
{
// Mark data pages(s) as normal
rc |= mm_set_permission(module->data,
datasize,
READ_ONLY);
}
return rc;
}
// ----------------------------------------------------------------------------
void vfs_module_init()
{
printk("Initializing modules.\n");
VfsSystemModule* module = &VFS_MODULES[0];
while ('\0' != module->module[0])
{
int rc = vfs_module_perms(module);
if(rc) printk("Perms set failed on %s, rc = %d\n",
module->module,rc);
++module;
}
module = &VFS_MODULES[0];
while ('\0' != module->module[0])
{
printk("\tIniting module %s...", module->module);
if (NULL != module->init)
(module->init)(NULL);
printk("done.\n");
++module;
}
printk("Modules initialized.\n");
}
// ----------------------------------------------------------------------------
VfsSystemModule * vfs_find_module(VfsSystemModule * i_table,
const char * i_name)
{
VfsSystemModule* module = i_table;
VfsSystemModule* ret = NULL;
while ('\0' != module->module[0])
{
if (0 == strcmp(i_name,module->module))
{
ret = module;
break;
}
module++;
}
return ret;
}
// ----------------------------------------------------------------------------
VfsSystemModule * vfs_find_address(VfsSystemModule * i_table,
const void * i_vaddr)
{
VfsSystemModule * module = i_table;
VfsSystemModule * ret = NULL;
const uint8_t * vaddr = reinterpret_cast<const uint8_t *>(i_vaddr);
while('\0' != module->module[0])
{
const uint8_t * first = reinterpret_cast<const uint8_t *>(module->text);
const uint8_t * last = first + module->byte_count;
if(vaddr >= first && vaddr < last)
{
ret = module;
break;
}
++module;
}
return ret;
}
|
