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Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
593 | mikedld | 8 | $Revision: 1190 $ |
9 | |||
10 | |||
65 | mario79 | 11 | ;************************************************************* |
578 | mario79 | 12 | ;* 12.07.2007 Check all 4 entry of MBR and EMBR |
13 | ;* 29.04.2006 Elimination of hangup after the |
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14 | ;* expiration hd_wait_timeout - Mario79 |
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15 | ;* 28.01.2006 find all Fat16/32 partition in all input point |
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16 | ;* to MBR - Mario79 |
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65 | mario79 | 17 | ;************************************************************* |
18 | |||
277 | diamond | 19 | uglobal |
65 | mario79 | 20 | align 4 |
256 | diamond | 21 | |
65 | mario79 | 22 | ;****************************************************** |
431 | serge | 23 | ; Please do not change this place - variables in text |
65 | mario79 | 24 | ; Mario79 |
25 | ; START place |
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26 | ;****************************************************** |
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27 | PARTITION_START dd 0x3f |
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28 | PARTITION_END dd 0 |
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256 | diamond | 29 | fs_type db 0 ; 0=none, 1=NTFS, 16=FAT16, 32=FAT32 |
277 | diamond | 30 | align 4 |
256 | diamond | 31 | |
32 | fs_dependent_data_start: |
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33 | ; FATxx data |
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34 | |||
65 | mario79 | 35 | SECTORS_PER_FAT dd 0x1f3a |
36 | NUMBER_OF_FATS dd 0x2 |
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37 | SECTORS_PER_CLUSTER dd 0x8 |
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38 | BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes |
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39 | ROOT_CLUSTER dd 2 ; first rootdir cluster |
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40 | FAT_START dd 0 ; start of fat table |
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41 | ROOT_START dd 0 ; start of rootdir (only fat16) |
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42 | ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16) |
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43 | DATA_START dd 0 ; start of data area (=first cluster 2) |
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44 | LAST_CLUSTER dd 0 ; last availabe cluster |
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45 | ADR_FSINFO dd 0 ; used only by fat32 |
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46 | |||
47 | fatRESERVED dd 0x0FFFFFF6 |
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48 | fatBAD dd 0x0FFFFFF7 |
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49 | fatEND dd 0x0FFFFFF8 |
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50 | fatMASK dd 0x0FFFFFFF |
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51 | |||
649 | diamond | 52 | fatStartScan dd 2 |
53 | |||
256 | diamond | 54 | fs_dependent_data_end: |
321 | diamond | 55 | file_system_data_size = $ - PARTITION_START |
56 | if file_system_data_size > 96 |
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57 | ERROR: sizeof(file system data) too big! |
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58 | end if |
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256 | diamond | 59 | |
60 | virtual at fs_dependent_data_start |
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61 | ; NTFS data |
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62 | ntfs_data: |
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63 | .sectors_per_cluster dd ? |
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64 | .mft_cluster dd ? |
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65 | .mftmirr_cluster dd ? |
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66 | .frs_size dd ? ; FRS size in bytes |
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67 | .iab_size dd ? ; IndexAllocationBuffer size in bytes |
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68 | .frs_buffer dd ? |
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69 | .iab_buffer dd ? |
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70 | .mft_retrieval dd ? |
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71 | .mft_retrieval_size dd ? |
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72 | .mft_retrieval_alloc dd ? |
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73 | .mft_retrieval_end dd ? |
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74 | .cur_index_size dd ? |
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75 | .cur_index_buf dd ? |
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76 | if $ > fs_dependent_data_end |
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77 | ERROR: increase sizeof(fs_dependent_data)! |
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78 | end if |
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79 | end virtual |
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80 | |||
65 | mario79 | 81 | ;*************************************************************************** |
82 | ; End place |
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83 | ; Mario79 |
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84 | ;*************************************************************************** |
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277 | diamond | 85 | endg |
86 | iglobal |
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65 | mario79 | 87 | |
88 | partition_types: ; list of fat16/32 partitions |
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89 | db 0x04 ; DOS: fat16 <32M |
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90 | db 0x06 ; DOS: fat16 >32M |
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91 | db 0x0b ; WIN95: fat32 |
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92 | db 0x0c ; WIN95: fat32, LBA-mapped |
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93 | db 0x0e ; WIN95: fat16, LBA-mapped |
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94 | db 0x14 ; Hidden DOS: fat16 <32M |
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95 | db 0x16 ; Hidden DOS: fat16 >32M |
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96 | db 0x1b ; Hidden WIN95: fat32 |
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97 | db 0x1c ; Hidden WIN95: fat32, LBA-mapped |
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98 | db 0x1e ; Hidden WIN95: fat16, LBA-mapped |
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99 | db 0xc4 ; DRDOS/secured: fat16 <32M |
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100 | db 0xc6 ; DRDOS/secured: fat16 >32M |
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101 | db 0xcb ; DRDOS/secured: fat32 |
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102 | db 0xcc ; DRDOS/secured: fat32, LBA-mapped |
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103 | db 0xce ; DRDOS/secured: fat16, LBA-mapped |
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104 | db 0xd4 ; Old Multiuser DOS secured: fat16 <32M |
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105 | db 0xd6 ; Old Multiuser DOS secured: fat16 >32M |
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256 | diamond | 106 | db 0x07 ; NTFS |
709 | diamond | 107 | db 0x27 ; NTFS, hidden |
65 | mario79 | 108 | partition_types_end: |
109 | |||
110 | |||
111 | extended_types: ; list of extended partitions |
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112 | db 0x05 ; DOS: extended partition |
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113 | db 0x0f ; WIN95: extended partition, LBA-mapped |
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114 | db 0xc5 ; DRDOS/secured: extended partition |
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115 | db 0xd5 ; Old Multiuser DOS secured: extended partition |
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116 | extended_types_end: |
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117 | |||
118 | endg |
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119 | |||
120 | ; Partition chain used: |
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121 | ; MBR ; PARTITION2 ; PARTITION3 ; PARTITION4 |
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122 | ;========================================================== |
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123 | ; fat16/32 +-- fat16/32 +-- fat16/32 +-- fat16/32 +-- |
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124 | ; extended --+ extended --+ extended --+ extended --+ |
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125 | ; 0 0 0 0 |
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126 | ; 0 0 0 0 |
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127 | ; Notes: |
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128 | ; - extended partition need to be in second entry on table |
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129 | ; - it will skip over removed partitions |
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130 | |||
131 | set_FAT32_variables: |
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132 | mov [problem_partition],0 |
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133 | call reserve_hd1 |
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321 | diamond | 134 | call reserve_hd_channel |
65 | mario79 | 135 | |
709 | diamond | 136 | pushad |
137 | |||
65 | mario79 | 138 | cmp dword [hdpos],0 |
139 | je problem_hd |
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140 | |||
141 | xor ecx,ecx ; partition count |
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142 | mov edx,-1 ; flag for partition |
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143 | xor eax,eax ; read MBR |
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144 | xor ebp,ebp ; extended partition start |
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145 | |||
146 | new_partition: |
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147 | test ebp,ebp ; is there extended partition? |
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148 | jnz extended_already_set ; yes |
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149 | xchg ebp,eax ; no. set it now |
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150 | |||
151 | extended_already_set: |
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152 | add eax,ebp ; mbr=mbr+0, ext_part=ext_start+relat_start |
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153 | mov ebx,buffer |
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154 | call hd_read |
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74 | mario79 | 155 | cmp [hd_error],0 |
156 | jne problem_hd |
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65 | mario79 | 157 | |
158 | cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector? |
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159 | jnz end_partition_chain |
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160 | cmp dword [ebx+0x1be+0xc],0 ; skip over empty partition |
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578 | mario79 | 161 | ; jz next_partition |
162 | jnz .next_primary_partition |
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163 | cmp dword [ebx+0x1be+0xc+16],0 |
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164 | jnz next_primary_partition |
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165 | cmp dword [ebx+0x1be+0xc+16+16],0 |
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166 | jnz next_primary_partition_1 |
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167 | cmp dword [ebx+0x1be+0xc+16+16+16],0 |
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168 | jnz next_primary_partition_2 |
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169 | jmp next_partition |
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170 | |||
171 | .next_primary_partition: |
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65 | mario79 | 172 | push eax |
173 | mov al,[ebx+0x1be+4] ; get primary partition type |
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174 | call scan_partition_types |
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175 | pop eax |
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176 | jnz next_primary_partition ; no. skip over |
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177 | |||
178 | inc ecx |
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179 | cmp ecx,[fat32part] ; is it wanted partition? |
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180 | jnz next_primary_partition ; no |
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181 | |||
256 | diamond | 182 | mov edx, eax ; start sector |
183 | add edx, [ebx+0x1be+8] ; add relative start |
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184 | push edx |
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185 | add edx, [ebx+0x1be+12] ; add length |
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186 | dec edx ; PARTITION_END is inclusive |
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187 | mov [PARTITION_END], edx ; note that this can be changed |
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188 | ; when file system data will be available |
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189 | mov dl, [ebx+0x1be+4] |
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190 | mov [fs_type], dl ; save for FS recognizer (separate FAT vs NTFS) |
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191 | pop edx |
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192 | |||
65 | mario79 | 193 | next_primary_partition: |
194 | push eax |
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195 | mov al,[ebx+0x1be+4+16] ; get primary partition type |
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196 | call scan_partition_types |
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197 | pop eax |
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198 | jnz next_primary_partition_1 ; no. skip over |
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199 | |||
200 | inc ecx |
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201 | cmp ecx,[fat32part] ; is it wanted partition? |
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202 | jnz next_primary_partition_1 ; no |
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203 | |||
256 | diamond | 204 | mov edx, eax |
205 | add edx, [ebx+0x1be+8+16] |
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206 | push edx |
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207 | add edx, [ebx+0x1be+12+16] |
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208 | dec edx |
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209 | mov [PARTITION_END], edx |
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210 | mov dl, [ebx+0x1be+4+16] |
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211 | mov [fs_type], dl |
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212 | pop edx |
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65 | mario79 | 213 | |
214 | next_primary_partition_1: |
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215 | push eax |
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216 | mov al,[ebx+0x1be+4+16+16] ; get primary partition type |
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217 | call scan_partition_types |
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218 | pop eax |
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219 | jnz next_primary_partition_2 ; no. skip over |
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220 | |||
221 | inc ecx |
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222 | cmp ecx,[fat32part] ; is it wanted partition? |
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223 | jnz next_primary_partition_2 ; no |
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224 | |||
256 | diamond | 225 | mov edx, eax |
226 | add edx, [ebx+0x1be+8+16+16] |
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227 | push edx |
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228 | add edx, [ebx+0x1be+12+16+16] |
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229 | dec edx |
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230 | mov [PARTITION_END], edx |
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231 | mov dl, [ebx+0x1be+4+16+16] |
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232 | mov [fs_type], dl |
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233 | pop edx |
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65 | mario79 | 234 | |
235 | next_primary_partition_2: |
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236 | push eax |
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237 | mov al,[ebx+0x1be+4+16+16+16] ; get primary partition type |
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238 | call scan_partition_types |
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239 | pop eax |
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240 | jnz next_partition ; no. skip over |
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241 | |||
242 | inc ecx |
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243 | cmp ecx,[fat32part] ; is it wanted partition? |
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244 | jnz next_partition ; no |
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245 | |||
256 | diamond | 246 | mov edx, eax |
247 | add edx, [ebx+0x1be+8+16+16+16] |
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248 | push edx |
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249 | add edx, [ebx+0x1be+12+16+16+16] |
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250 | dec edx |
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251 | mov [PARTITION_END], edx |
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252 | mov dl, [ebx+0x1be+4+16+16+16] |
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253 | mov [fs_type], dl |
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254 | pop edx |
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65 | mario79 | 255 | |
256 | next_partition: |
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257 | push eax |
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258 | mov al,[ebx+0x1be+4] ; get extended partition type |
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259 | call scan_extended_types |
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260 | pop eax |
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261 | jnz next_partition_1 |
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262 | |||
263 | mov eax,[ebx+0x1be+8] ; add relative start |
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264 | test eax,eax ; is there extended partition? |
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265 | jnz new_partition ; yes. read it |
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266 | |||
267 | next_partition_1: |
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268 | push eax |
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269 | mov al,[ebx+0x1be+4+16] ; get extended partition type |
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270 | call scan_extended_types |
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271 | pop eax |
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272 | jnz next_partition_2 |
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273 | |||
274 | mov eax,[ebx+0x1be+8+16] ; add relative start |
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275 | test eax,eax ; is there extended partition? |
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276 | jnz new_partition ; yes. read it |
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277 | |||
278 | next_partition_2: |
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279 | push eax |
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280 | mov al,[ebx+0x1be+4+16+16] ; get extended partition type |
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281 | call scan_extended_types |
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282 | pop eax |
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283 | jnz next_partition_3 |
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284 | |||
285 | mov eax,[ebx+0x1be+8+16+16] ; add relative start |
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286 | test eax,eax ; is there extended partition? |
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287 | jnz new_partition ; yes. read it |
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288 | |||
289 | next_partition_3: |
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290 | push eax |
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291 | mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type |
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292 | call scan_extended_types |
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293 | pop eax |
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294 | jnz end_partition_chain ; no. end chain |
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295 | |||
296 | mov eax,[ebx+0x1be+8+16+16+16] ; get start of extended partition |
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297 | test eax,eax ; is there extended partition? |
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298 | jnz new_partition ; yes. read it |
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299 | |||
300 | end_partition_chain: |
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301 | mov [partition_count],ecx |
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302 | |||
303 | cmp edx,-1 ; found wanted partition? |
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304 | jnz hd_and_partition_ok ; yes. install it |
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305 | jmp problem_partition_or_fat |
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306 | |||
307 | scan_partition_types: |
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308 | push ecx |
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309 | mov edi,partition_types |
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310 | mov ecx,partition_types_end-partition_types |
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311 | cld |
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312 | repne scasb ; is partition type ok? |
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313 | pop ecx |
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314 | ret |
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315 | |||
316 | scan_extended_types: |
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317 | push ecx |
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318 | mov edi,extended_types |
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319 | mov ecx,extended_types_end-extended_types |
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320 | cld |
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321 | repne scasb ; is it extended partition? |
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322 | pop ecx |
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323 | ret |
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324 | |||
325 | problem_fat_dec_count: ; bootsector is missing or another problem |
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326 | dec [partition_count] ; remove it from partition_count |
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327 | |||
328 | problem_partition_or_fat: |
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709 | diamond | 329 | problem_hd: |
65 | mario79 | 330 | popad |
331 | |||
256 | diamond | 332 | mov [fs_type],0 |
321 | diamond | 333 | call free_hd_channel |
65 | mario79 | 334 | mov [hd1_status],0 ; free |
335 | mov [problem_partition],1 |
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336 | ret |
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337 | |||
338 | hd_and_partition_ok: |
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339 | mov eax,edx |
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340 | mov [PARTITION_START],eax |
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256 | diamond | 341 | mov edx, [PARTITION_END] |
342 | sub edx, eax |
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343 | inc edx ; edx = length of partition |
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65 | mario79 | 344 | |
256 | diamond | 345 | ; mov [hd_setup],1 |
65 | mario79 | 346 | mov ebx,buffer |
347 | call hd_read ; read boot sector of partition |
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256 | diamond | 348 | cmp [hd_error], 0 |
349 | jz boot_read_ok |
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350 | cmp [fs_type], 7 |
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351 | jnz problem_fat_dec_count |
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352 | ; NTFS duplicates bootsector: |
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353 | ; NT4/2k/XP+ saves bootsector copy in the end of disk |
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354 | ; NT 3.51 saves bootsector copy in the middle of disk |
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355 | and [hd_error], 0 |
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356 | mov eax, [PARTITION_END] |
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357 | call hd_read |
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358 | cmp [hd_error], 0 |
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359 | jnz @f |
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360 | call ntfs_test_bootsec |
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361 | jnc boot_read_ok |
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362 | @@: |
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363 | and [hd_error], 0 |
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364 | mov eax, edx |
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365 | shr eax, 1 |
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366 | add eax, [PARTITION_START] |
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367 | call hd_read |
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368 | cmp [hd_error], 0 |
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369 | jnz problem_fat_dec_count ; не судьба... |
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370 | boot_read_ok: |
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371 | ; mov [hd_setup], 0 |
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372 | ; if we are running on NTFS, check bootsector |
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709 | diamond | 373 | ; cmp [fs_type], 7 |
374 | ; jz ntfs_setup |
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375 | call ntfs_test_bootsec |
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376 | jnc ntfs_setup |
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74 | mario79 | 377 | |
65 | mario79 | 378 | cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector? |
379 | jnz problem_fat_dec_count |
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380 | |||
381 | movzx eax,word [ebx+0xe] ; sectors reserved |
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382 | add eax,[PARTITION_START] |
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383 | mov [FAT_START],eax ; fat_start = partition_start + reserved |
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384 | |||
385 | movzx eax,byte [ebx+0xd] ; sectors per cluster |
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1190 | diamond | 386 | test eax,eax |
387 | jz problem_fat_dec_count |
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65 | mario79 | 388 | mov [SECTORS_PER_CLUSTER],eax |
389 | |||
390 | movzx ecx,word [ebx+0xb] ; bytes per sector |
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1190 | diamond | 391 | cmp eax,0x200 |
392 | jnz problem_fat_dec_count |
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65 | mario79 | 393 | mov [BYTES_PER_SECTOR],ecx |
394 | |||
395 | movzx eax,word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
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396 | mov edx,32 |
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397 | mul edx |
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398 | dec ecx |
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399 | add eax,ecx ; round up if not equal count |
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400 | inc ecx ; bytes per sector |
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401 | div ecx |
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402 | mov [ROOT_SECTORS],eax ; count of rootdir sectors |
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403 | |||
404 | movzx eax,word [ebx+0x16] ; sectors per fat <65536 |
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405 | test eax,eax |
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406 | jnz fat16_fatsize |
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407 | mov eax,[ebx+0x24] ; sectors per fat |
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408 | fat16_fatsize: |
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409 | mov [SECTORS_PER_FAT],eax |
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410 | |||
411 | movzx eax,byte [ebx+0x10] ; number of fats |
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412 | test eax,eax ; if 0 it's not fat partition |
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413 | jz problem_fat_dec_count |
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414 | mov [NUMBER_OF_FATS],eax |
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415 | imul eax,[SECTORS_PER_FAT] |
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416 | add eax,[FAT_START] |
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417 | mov [ROOT_START],eax ; rootdir = fat_start + fat_size * fat_count |
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418 | add eax,[ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
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419 | mov [DATA_START],eax ; data area = rootdir + rootdir_size |
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420 | |||
421 | movzx eax,word [ebx+0x13] ; total sector count <65536 |
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422 | test eax,eax |
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423 | jnz fat16_total |
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424 | mov eax,[ebx+0x20] ; total sector count |
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425 | fat16_total: |
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426 | add eax,[PARTITION_START] |
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427 | dec eax |
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428 | mov [PARTITION_END],eax |
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429 | inc eax |
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430 | sub eax,[DATA_START] ; eax = count of data sectors |
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431 | xor edx,edx |
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432 | div dword [SECTORS_PER_CLUSTER] |
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433 | inc eax |
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434 | mov [LAST_CLUSTER],eax |
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435 | dec eax ; cluster count |
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649 | diamond | 436 | mov [fatStartScan],2 |
65 | mario79 | 437 | |
438 | ; limits by Microsoft Hardware White Paper v1.03 |
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439 | cmp eax,4085 ; 0xff5 |
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440 | jb problem_fat_dec_count ; fat12 not supported |
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441 | cmp eax,65525 ; 0xfff5 |
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442 | jb fat16_partition |
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443 | |||
444 | fat32_partition: |
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445 | mov eax,[ebx+0x2c] ; rootdir cluster |
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446 | mov [ROOT_CLUSTER],eax |
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447 | movzx eax,word [ebx+0x30] ; fs info sector |
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448 | add eax,[PARTITION_START] |
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449 | mov [ADR_FSINFO],eax |
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649 | diamond | 450 | call hd_read |
451 | mov eax,[ebx+0x1ec] |
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452 | cmp eax,-1 |
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453 | jz @f |
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454 | mov [fatStartScan],eax |
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455 | @@: |
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65 | mario79 | 456 | |
457 | popad |
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458 | |||
459 | mov [fatRESERVED],0x0FFFFFF6 |
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460 | mov [fatBAD],0x0FFFFFF7 |
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461 | mov [fatEND],0x0FFFFFF8 |
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462 | mov [fatMASK],0x0FFFFFFF |
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256 | diamond | 463 | mov [fs_type],32 ; Fat32 |
321 | diamond | 464 | call free_hd_channel |
65 | mario79 | 465 | mov [hd1_status],0 ; free |
466 | ret |
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467 | |||
468 | fat16_partition: |
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469 | xor eax,eax |
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470 | mov [ROOT_CLUSTER],eax |
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471 | |||
472 | popad |
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473 | |||
474 | mov [fatRESERVED],0x0000FFF6 |
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475 | mov [fatBAD],0x0000FFF7 |
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476 | mov [fatEND],0x0000FFF8 |
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477 | mov [fatMASK],0x0000FFFF |
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256 | diamond | 478 | mov [fs_type],16 ; Fat16 |
321 | diamond | 479 | call free_hd_channel |
65 | mario79 | 480 | mov [hd1_status],0 ; free |
481 | ret65536 |