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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: 1419 $ |
9 | |||
10 | |||
1410 | turbanoff | 11 | ;************************************************************* |
12 | ;* 13.02.2010 Find all partition and check supported FS |
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578 | mario79 | 13 | ;* 12.07.2007 Check all 4 entry of MBR and EMBR |
14 | ;* 29.04.2006 Elimination of hangup after the |
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15 | ;* expiration hd_wait_timeout - Mario79 |
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16 | ;* 28.01.2006 find all Fat16/32 partition in all input point |
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17 | ;* to MBR - Mario79 |
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65 | mario79 | 18 | ;************************************************************* |
19 | |||
277 | diamond | 20 | uglobal |
65 | mario79 | 21 | align 4 |
256 | diamond | 22 | |
65 | mario79 | 23 | ;****************************************************** |
431 | serge | 24 | ; Please do not change this place - variables in text |
65 | mario79 | 25 | ; Mario79 |
26 | ; START place |
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27 | ;****************************************************** |
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28 | PARTITION_START dd 0x3f |
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29 | PARTITION_END dd 0 |
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1410 | turbanoff | 30 | fs_type db 0 ; 1=NTFS, 2=EXT2/3, 16=FAT16, 32=FAT32 |
277 | diamond | 31 | align 4 |
256 | diamond | 32 | |
33 | fs_dependent_data_start: |
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34 | ; FATxx data |
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35 | |||
65 | mario79 | 36 | SECTORS_PER_FAT dd 0x1f3a |
37 | NUMBER_OF_FATS dd 0x2 |
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38 | SECTORS_PER_CLUSTER dd 0x8 |
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39 | BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes |
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40 | ROOT_CLUSTER dd 2 ; first rootdir cluster |
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41 | FAT_START dd 0 ; start of fat table |
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42 | ROOT_START dd 0 ; start of rootdir (only fat16) |
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43 | ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16) |
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44 | DATA_START dd 0 ; start of data area (=first cluster 2) |
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45 | LAST_CLUSTER dd 0 ; last availabe cluster |
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46 | ADR_FSINFO dd 0 ; used only by fat32 |
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47 | |||
48 | fatRESERVED dd 0x0FFFFFF6 |
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49 | fatBAD dd 0x0FFFFFF7 |
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50 | fatEND dd 0x0FFFFFF8 |
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51 | fatMASK dd 0x0FFFFFFF |
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52 | |||
649 | diamond | 53 | fatStartScan dd 2 |
54 | |||
256 | diamond | 55 | fs_dependent_data_end: |
321 | diamond | 56 | file_system_data_size = $ - PARTITION_START |
57 | if file_system_data_size > 96 |
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58 | ERROR: sizeof(file system data) too big! |
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1379 | turbanoff | 59 | end if |
256 | diamond | 60 | |
61 | virtual at fs_dependent_data_start |
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62 | ; NTFS data |
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63 | ntfs_data: |
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64 | .sectors_per_cluster dd ? |
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65 | .mft_cluster dd ? |
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66 | .mftmirr_cluster dd ? |
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67 | .frs_size dd ? ; FRS size in bytes |
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68 | .iab_size dd ? ; IndexAllocationBuffer size in bytes |
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69 | .frs_buffer dd ? |
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70 | .iab_buffer dd ? |
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71 | .mft_retrieval dd ? |
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72 | .mft_retrieval_size dd ? |
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73 | .mft_retrieval_alloc dd ? |
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74 | .mft_retrieval_end dd ? |
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75 | .cur_index_size dd ? |
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76 | .cur_index_buf dd ? |
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77 | if $ > fs_dependent_data_end |
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78 | ERROR: increase sizeof(fs_dependent_data)! |
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79 | end if |
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1379 | turbanoff | 80 | end virtual |
81 | |||
1378 | turbanoff | 82 | virtual at fs_dependent_data_start |
83 | ; EXT2 data |
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84 | ext2_data: |
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1379 | turbanoff | 85 | .log_block_size dd ? |
86 | .block_size dd ? |
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87 | .count_block_in_block dd ? |
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88 | .blocks_per_group dd ? |
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89 | .inodes_per_group dd ? |
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90 | .global_desc_table dd ? |
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91 | .root_inode dd ? ; pointer to root inode in memory |
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92 | .inode_size dd ? |
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93 | .count_pointer_in_block dd ? ; block_size / 4 |
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94 | .count_pointer_in_block_square dd ? ; (block_size / 4)**2 |
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95 | .ext2_save_block dd ? ; блок на глобальную 1 процедуру |
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96 | .ext2_temp_block dd ? ; блок для мелких процедур |
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97 | .ext2_save_inode dd ? ; inode на глобальную процедуру |
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1419 | turbanoff | 98 | .ext2_temp_inode dd ? ; inode для мелких процедур |
99 | .sb dd ? ; superblock |
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100 | .groups_count dd ? |
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1378 | turbanoff | 101 | if $ > fs_dependent_data_end |
102 | ERROR: increase sizeof(fs_dependent_data)! |
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103 | end if |
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256 | diamond | 104 | end virtual |
1379 | turbanoff | 105 | |
65 | mario79 | 106 | ;*************************************************************************** |
107 | ; End place |
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108 | ; Mario79 |
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109 | ;*************************************************************************** |
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277 | diamond | 110 | endg |
111 | iglobal |
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65 | mario79 | 112 | |
113 | partition_types: ; list of fat16/32 partitions |
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114 | db 0x04 ; DOS: fat16 <32M |
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115 | db 0x06 ; DOS: fat16 >32M |
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116 | db 0x0b ; WIN95: fat32 |
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117 | db 0x0c ; WIN95: fat32, LBA-mapped |
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118 | db 0x0e ; WIN95: fat16, LBA-mapped |
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119 | db 0x14 ; Hidden DOS: fat16 <32M |
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120 | db 0x16 ; Hidden DOS: fat16 >32M |
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121 | db 0x1b ; Hidden WIN95: fat32 |
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122 | db 0x1c ; Hidden WIN95: fat32, LBA-mapped |
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123 | db 0x1e ; Hidden WIN95: fat16, LBA-mapped |
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124 | db 0xc4 ; DRDOS/secured: fat16 <32M |
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125 | db 0xc6 ; DRDOS/secured: fat16 >32M |
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126 | db 0xcb ; DRDOS/secured: fat32 |
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127 | db 0xcc ; DRDOS/secured: fat32, LBA-mapped |
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128 | db 0xce ; DRDOS/secured: fat16, LBA-mapped |
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129 | db 0xd4 ; Old Multiuser DOS secured: fat16 <32M |
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130 | db 0xd6 ; Old Multiuser DOS secured: fat16 >32M |
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256 | diamond | 131 | db 0x07 ; NTFS |
1379 | turbanoff | 132 | db 0x27 ; NTFS, hidden |
1378 | turbanoff | 133 | db 0x83 ; Linux native file system (ext2fs) |
65 | mario79 | 134 | partition_types_end: |
135 | |||
136 | |||
137 | extended_types: ; list of extended partitions |
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138 | db 0x05 ; DOS: extended partition |
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139 | db 0x0f ; WIN95: extended partition, LBA-mapped |
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140 | db 0xc5 ; DRDOS/secured: extended partition |
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141 | db 0xd5 ; Old Multiuser DOS secured: extended partition |
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142 | extended_types_end: |
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143 | |||
144 | endg |
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145 | |||
146 | ; Partition chain used: |
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1379 | turbanoff | 147 | ; MBR <--------------------- |
148 | ; | | |
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149 | ; |-> PARTITION1 | |
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150 | ; |-> EXTENDED PARTITION - ;not need be second partition |
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151 | ; |-> PARTITION3 |
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152 | ; |-> PARTITION4 |
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153 | |||
1378 | turbanoff | 154 | set_PARTITION_variables: |
155 | set_FAT32_variables: ;deprecated |
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1410 | turbanoff | 156 | and [problem_partition], 0 |
65 | mario79 | 157 | call reserve_hd1 |
321 | diamond | 158 | call reserve_hd_channel |
65 | mario79 | 159 | |
709 | diamond | 160 | pushad |
161 | |||
65 | mario79 | 162 | cmp dword [hdpos],0 |
163 | je problem_hd |
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164 | |||
165 | xor ecx,ecx ; partition count |
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1410 | turbanoff | 166 | ;or edx,-1 ; flag for partition |
1378 | turbanoff | 167 | xor eax,eax ; address MBR |
65 | mario79 | 168 | xor ebp,ebp ; extended partition start |
169 | |||
1378 | turbanoff | 170 | new_mbr: |
171 | test ebp,ebp ; is there extended partition? (MBR or EMBR) |
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65 | mario79 | 172 | jnz extended_already_set ; yes |
173 | xchg ebp,eax ; no. set it now |
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174 | |||
175 | extended_already_set: |
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176 | add eax,ebp ; mbr=mbr+0, ext_part=ext_start+relat_start |
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177 | mov ebx,buffer |
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178 | call hd_read |
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74 | mario79 | 179 | cmp [hd_error],0 |
180 | jne problem_hd |
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65 | mario79 | 181 | |
182 | cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector? |
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1410 | turbanoff | 183 | jnz end_partition_chain |
184 | push eax ; push only one time |
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65 | mario79 | 185 | cmp dword [ebx+0x1be+0xc],0 ; skip over empty partition |
1378 | turbanoff | 186 | jnz test_primary_partition_0 |
578 | mario79 | 187 | cmp dword [ebx+0x1be+0xc+16],0 |
1378 | turbanoff | 188 | jnz test_primary_partition_1 |
578 | mario79 | 189 | cmp dword [ebx+0x1be+0xc+16+16],0 |
1378 | turbanoff | 190 | jnz test_primary_partition_2 |
578 | mario79 | 191 | cmp dword [ebx+0x1be+0xc+16+16+16],0 |
1410 | turbanoff | 192 | jnz test_primary_partition_3 |
193 | pop eax |
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1378 | turbanoff | 194 | jmp end_partition_chain |
195 | |||
196 | test_primary_partition_0: |
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65 | mario79 | 197 | mov al,[ebx+0x1be+4] ; get primary partition type |
198 | call scan_partition_types |
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1378 | turbanoff | 199 | jnz test_primary_partition_1 ; no. skip over |
65 | mario79 | 200 | |
201 | inc ecx |
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1378 | turbanoff | 202 | cmp ecx,[known_part] ; is it wanted partition? |
203 | jnz test_primary_partition_1 ; no |
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1410 | turbanoff | 204 | |
205 | pop eax |
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206 | ;mov edx, eax ; start sector |
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207 | add eax, [ebx+0x1be+8] ; add relative start |
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208 | ;mov [PARTITON_START],edx |
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209 | ;push edx |
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210 | mov edx, [ebx+0x1be+12] ; length |
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211 | ;add edx, eax ; add length |
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212 | ;dec edx ; PARTITION_END is inclusive |
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213 | ;mov [PARTITION_END], edx ; note that this can be changed |
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256 | diamond | 214 | ; when file system data will be available |
1410 | turbanoff | 215 | mov cl, [ebx+0x1be+4] ; fs_type |
216 | ;mov [fs_type], dl ; save for FS recognizer (separate FAT vs NTFS) |
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217 | ;pop edx |
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218 | jmp hd_and_partition_ok |
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256 | diamond | 219 | |
1378 | turbanoff | 220 | test_primary_partition_1: |
65 | mario79 | 221 | mov al,[ebx+0x1be+4+16] ; get primary partition type |
222 | call scan_partition_types |
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1378 | turbanoff | 223 | jnz test_primary_partition_2 ; no. skip over |
65 | mario79 | 224 | |
225 | inc ecx |
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1378 | turbanoff | 226 | cmp ecx,[known_part] ; is it wanted partition? |
227 | jnz test_primary_partition_2 ; no |
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1410 | turbanoff | 228 | |
229 | pop eax |
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230 | add eax, [ebx+0x1be+8+16] |
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231 | mov edx, [ebx+0x1be+12+16] |
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232 | mov cl, [ebx+0x1be+4+16] |
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233 | jmp hd_and_partition_ok |
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65 | mario79 | 234 | |
1410 | turbanoff | 235 | ;mov edx, eax |
236 | ;add edx, [ebx+0x1be+8+16] |
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237 | ;push edx |
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238 | ;add edx, [ebx+0x1be+12+16] |
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239 | ;dec edx |
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240 | ;mov [PARTITION_END], edx |
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241 | ;mov al, [ebx+0x1be+4+16] |
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242 | ;mov [fs_type], dl |
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243 | ;pop edx |
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65 | mario79 | 244 | |
1378 | turbanoff | 245 | test_primary_partition_2: |
65 | mario79 | 246 | mov al,[ebx+0x1be+4+16+16] ; get primary partition type |
247 | call scan_partition_types |
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1378 | turbanoff | 248 | jnz test_primary_partition_3 ; no. skip over |
65 | mario79 | 249 | |
250 | inc ecx |
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1378 | turbanoff | 251 | cmp ecx,[known_part] ; is it wanted partition? |
252 | jnz test_primary_partition_3 ; no |
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1410 | turbanoff | 253 | |
254 | pop eax |
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255 | add eax, [ebx+0x1be+8+16+16] |
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256 | mov edx, [ebx+0x1be+12+16+16] |
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257 | mov cl, [ebx+0x1be+4+16+16] |
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258 | jmp hd_and_partition_ok |
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259 | ;mov edx, eax |
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260 | ;add edx, [ebx+0x1be+8+16+16] |
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261 | ;push edx |
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262 | ;add edx, [ebx+0x1be+12+16+16] |
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263 | ;dec edx |
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264 | ;mov [PARTITION_END], edx |
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265 | ;mov al, [ebx+0x1be+4+16+16] |
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266 | ;mov [fs_type], dl |
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267 | ;pop edx |
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65 | mario79 | 268 | |
1378 | turbanoff | 269 | test_primary_partition_3: |
65 | mario79 | 270 | mov al,[ebx+0x1be+4+16+16+16] ; get primary partition type |
271 | call scan_partition_types |
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1378 | turbanoff | 272 | jnz test_ext_partition_0 ; no. skip over |
65 | mario79 | 273 | |
274 | inc ecx |
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1378 | turbanoff | 275 | cmp ecx,[known_part] ; is it wanted partition? |
276 | jnz test_ext_partition_0 ; no |
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1410 | turbanoff | 277 | |
278 | pop eax |
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279 | add eax, [ebx+0x1be+8+16+16+16] |
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280 | mov edx, [ebx+0x1be+12+16+16+16] |
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281 | mov cl, [ebx+0x1be+4+16+16+16] |
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282 | jmp hd_and_partition_ok |
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65 | mario79 | 283 | |
1410 | turbanoff | 284 | ;mov edx, eax |
285 | ;add edx, [ebx+0x1be+8+16+16+16] |
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286 | ;push edx |
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287 | ;add edx, [ebx+0x1be+12+16+16+16] |
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288 | ;dec edx |
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289 | ;mov [PARTITION_END], edx |
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290 | ;mov al, [ebx+0x1be+4+16+16+16] |
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291 | ;mov [fs_type], dl |
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292 | ;pop edx |
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65 | mario79 | 293 | |
1410 | turbanoff | 294 | test_ext_partition_0: |
295 | pop eax ; просто выкидываем из стека |
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65 | mario79 | 296 | mov al,[ebx+0x1be+4] ; get extended partition type |
297 | call scan_extended_types |
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1378 | turbanoff | 298 | jnz test_ext_partition_1 |
65 | mario79 | 299 | |
300 | mov eax,[ebx+0x1be+8] ; add relative start |
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301 | test eax,eax ; is there extended partition? |
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1378 | turbanoff | 302 | jnz new_mbr ; yes. read it |
65 | mario79 | 303 | |
1378 | turbanoff | 304 | test_ext_partition_1: |
65 | mario79 | 305 | mov al,[ebx+0x1be+4+16] ; get extended partition type |
306 | call scan_extended_types |
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1378 | turbanoff | 307 | jnz test_ext_partition_2 |
65 | mario79 | 308 | |
1378 | turbanoff | 309 | mov eax,[ebx+0x1be+8+16] ; add relative start |
65 | mario79 | 310 | test eax,eax ; is there extended partition? |
1378 | turbanoff | 311 | jnz new_mbr ; yes. read it |
65 | mario79 | 312 | |
1378 | turbanoff | 313 | test_ext_partition_2: |
65 | mario79 | 314 | mov al,[ebx+0x1be+4+16+16] ; get extended partition type |
315 | call scan_extended_types |
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1378 | turbanoff | 316 | jnz test_ext_partition_3 |
65 | mario79 | 317 | |
318 | mov eax,[ebx+0x1be+8+16+16] ; add relative start |
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319 | test eax,eax ; is there extended partition? |
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1378 | turbanoff | 320 | jnz new_mbr ; yes. read it |
321 | |||
322 | test_ext_partition_3: |
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65 | mario79 | 323 | mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type |
324 | call scan_extended_types |
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325 | jnz end_partition_chain ; no. end chain |
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326 | |||
327 | mov eax,[ebx+0x1be+8+16+16+16] ; get start of extended partition |
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328 | test eax,eax ; is there extended partition? |
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1378 | turbanoff | 329 | jnz new_mbr ; yes. read it |
330 | |||
65 | mario79 | 331 | end_partition_chain: |
1410 | turbanoff | 332 | ;mov [partition_count],ecx |
65 | mario79 | 333 | |
1410 | turbanoff | 334 | ;cmp edx,-1 ; found wanted partition? |
335 | ;jnz hd_and_partition_ok ; yes. install it |
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336 | ;jmp problem_partition_or_fat |
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337 | problem_hd: |
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338 | or [problem_partition], 2 |
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339 | jmp return_from_part_set |
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65 | mario79 | 340 | |
1410 | turbanoff | 341 | |
65 | mario79 | 342 | scan_partition_types: |
343 | push ecx |
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344 | mov edi,partition_types |
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345 | mov ecx,partition_types_end-partition_types |
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346 | cld |
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347 | repne scasb ; is partition type ok? |
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348 | pop ecx |
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349 | ret |
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350 | |||
351 | scan_extended_types: |
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352 | push ecx |
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353 | mov edi,extended_types |
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354 | mov ecx,extended_types_end-extended_types |
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355 | cld |
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356 | repne scasb ; is it extended partition? |
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357 | pop ecx |
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358 | ret |
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359 | |||
360 | problem_fat_dec_count: ; bootsector is missing or another problem |
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1410 | turbanoff | 361 | ; dec [partition_count] ; remove it from partition_count |
65 | mario79 | 362 | |
363 | problem_partition_or_fat: |
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1410 | turbanoff | 364 | or [problem_partition],1 |
365 | |||
366 | return_from_part_set: |
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65 | mario79 | 367 | popad |
1410 | turbanoff | 368 | ;mov [fs_type],0 |
321 | diamond | 369 | call free_hd_channel |
65 | mario79 | 370 | mov [hd1_status],0 ; free |
371 | ret |
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372 | |||
1410 | turbanoff | 373 | hd_and_partition_ok: |
374 | |||
375 | ;eax = PARTITION_START edx=PARTITION_LENGTH cl=fs_type |
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376 | mov [fs_type], cl |
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377 | ;mov eax,edx |
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378 | mov [PARTITION_START],eax |
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379 | add edx, eax |
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380 | dec edx |
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381 | mov [PARTITION_END], edx |
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65 | mario79 | 382 | |
1410 | turbanoff | 383 | ; mov edx, [PARTITION_END] |
384 | ; sub edx, eax |
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385 | ; inc edx ; edx = length of partition зачем оно нам?? |
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386 | |||
256 | diamond | 387 | ; mov [hd_setup],1 |
65 | mario79 | 388 | mov ebx,buffer |
389 | call hd_read ; read boot sector of partition |
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256 | diamond | 390 | cmp [hd_error], 0 |
391 | jz boot_read_ok |
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392 | cmp [fs_type], 7 |
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393 | jnz problem_fat_dec_count |
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394 | ; NTFS duplicates bootsector: |
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395 | ; NT4/2k/XP+ saves bootsector copy in the end of disk |
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396 | ; NT 3.51 saves bootsector copy in the middle of disk |
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397 | and [hd_error], 0 |
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398 | mov eax, [PARTITION_END] |
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399 | call hd_read |
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400 | cmp [hd_error], 0 |
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401 | jnz @f |
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402 | call ntfs_test_bootsec |
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403 | jnc boot_read_ok |
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404 | @@: |
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405 | and [hd_error], 0 |
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406 | mov eax, edx |
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407 | shr eax, 1 |
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408 | add eax, [PARTITION_START] |
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409 | call hd_read |
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410 | cmp [hd_error], 0 |
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1378 | turbanoff | 411 | jnz problem_fat_dec_count ; no chance... |
256 | diamond | 412 | boot_read_ok: |
1378 | turbanoff | 413 | |
256 | diamond | 414 | ; if we are running on NTFS, check bootsector |
74 | mario79 | 415 | |
1378 | turbanoff | 416 | call ntfs_test_bootsec ; test ntfs |
1379 | turbanoff | 417 | jnc ntfs_setup |
418 | |||
419 | call ext2_test_superblock ; test ext2fs |
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1410 | turbanoff | 420 | jnc ext2_setup |
1379 | turbanoff | 421 | |
1410 | turbanoff | 422 | mov eax, [PARTITION_START] ;ext2 test changes [buffer] |
423 | call hd_read |
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1379 | turbanoff | 424 | cmp [hd_error], 0 |
1410 | turbanoff | 425 | jnz problem_fat_dec_count |
1378 | turbanoff | 426 | |
65 | mario79 | 427 | cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector? |
428 | jnz problem_fat_dec_count |
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429 | |||
430 | movzx eax,word [ebx+0xe] ; sectors reserved |
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431 | add eax,[PARTITION_START] |
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432 | mov [FAT_START],eax ; fat_start = partition_start + reserved |
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433 | |||
434 | movzx eax,byte [ebx+0xd] ; sectors per cluster |
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1190 | diamond | 435 | test eax,eax |
436 | jz problem_fat_dec_count |
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65 | mario79 | 437 | mov [SECTORS_PER_CLUSTER],eax |
438 | |||
439 | movzx ecx,word [ebx+0xb] ; bytes per sector |
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1191 | diamond | 440 | cmp ecx,0x200 |
1190 | diamond | 441 | jnz problem_fat_dec_count |
65 | mario79 | 442 | mov [BYTES_PER_SECTOR],ecx |
443 | |||
444 | movzx eax,word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
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445 | mov edx,32 |
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446 | mul edx |
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447 | dec ecx |
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448 | add eax,ecx ; round up if not equal count |
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449 | inc ecx ; bytes per sector |
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450 | div ecx |
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451 | mov [ROOT_SECTORS],eax ; count of rootdir sectors |
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452 | |||
453 | movzx eax,word [ebx+0x16] ; sectors per fat <65536 |
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454 | test eax,eax |
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455 | jnz fat16_fatsize |
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456 | mov eax,[ebx+0x24] ; sectors per fat |
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457 | fat16_fatsize: |
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458 | mov [SECTORS_PER_FAT],eax |
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459 | |||
460 | movzx eax,byte [ebx+0x10] ; number of fats |
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461 | test eax,eax ; if 0 it's not fat partition |
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462 | jz problem_fat_dec_count |
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463 | mov [NUMBER_OF_FATS],eax |
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464 | imul eax,[SECTORS_PER_FAT] |
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465 | add eax,[FAT_START] |
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466 | mov [ROOT_START],eax ; rootdir = fat_start + fat_size * fat_count |
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467 | add eax,[ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
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468 | mov [DATA_START],eax ; data area = rootdir + rootdir_size |
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469 | |||
470 | movzx eax,word [ebx+0x13] ; total sector count <65536 |
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471 | test eax,eax |
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472 | jnz fat16_total |
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473 | mov eax,[ebx+0x20] ; total sector count |
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474 | fat16_total: |
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475 | add eax,[PARTITION_START] |
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476 | dec eax |
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477 | mov [PARTITION_END],eax |
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478 | inc eax |
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479 | sub eax,[DATA_START] ; eax = count of data sectors |
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480 | xor edx,edx |
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481 | div dword [SECTORS_PER_CLUSTER] |
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482 | inc eax |
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483 | mov [LAST_CLUSTER],eax |
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484 | dec eax ; cluster count |
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649 | diamond | 485 | mov [fatStartScan],2 |
65 | mario79 | 486 | |
487 | ; limits by Microsoft Hardware White Paper v1.03 |
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488 | cmp eax,4085 ; 0xff5 |
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489 | jb problem_fat_dec_count ; fat12 not supported |
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490 | cmp eax,65525 ; 0xfff5 |
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491 | jb fat16_partition |
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492 | |||
493 | fat32_partition: |
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494 | mov eax,[ebx+0x2c] ; rootdir cluster |
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495 | mov [ROOT_CLUSTER],eax |
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496 | movzx eax,word [ebx+0x30] ; fs info sector |
||
497 | add eax,[PARTITION_START] |
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498 | mov [ADR_FSINFO],eax |
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649 | diamond | 499 | call hd_read |
500 | mov eax,[ebx+0x1ec] |
||
501 | cmp eax,-1 |
||
502 | jz @f |
||
503 | mov [fatStartScan],eax |
||
504 | @@: |
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65 | mario79 | 505 | |
506 | popad |
||
507 | |||
508 | mov [fatRESERVED],0x0FFFFFF6 |
||
509 | mov [fatBAD],0x0FFFFFF7 |
||
510 | mov [fatEND],0x0FFFFFF8 |
||
511 | mov [fatMASK],0x0FFFFFFF |
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256 | diamond | 512 | mov [fs_type],32 ; Fat32 |
321 | diamond | 513 | call free_hd_channel |
65 | mario79 | 514 | mov [hd1_status],0 ; free |
515 | ret |
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516 | |||
517 | fat16_partition: |
||
518 | xor eax,eax |
||
519 | mov [ROOT_CLUSTER],eax |
||
520 | |||
521 | popad |
||
522 | |||
523 | mov [fatRESERVED],0x0000FFF6 |
||
524 | mov [fatBAD],0x0000FFF7 |
||
525 | mov [fatEND],0x0000FFF8 |
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526 | mov [fatMASK],0x0000FFFF |
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256 | diamond | 527 | mov [fs_type],16 ; Fat16 |
321 | diamond | 528 | call free_hd_channel |
65 | mario79 | 529 | mov [hd1_status],0 ; free |
1410 | turbanoff | 530 | ret65536 |
531 |