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1 | ; Various Management functions for the Interaction with the File- | |
2 | ; systems | |
3 | ; | |
4 | ; Copyright (C) 2010 Frank Zoll | |
5 | ; | |
6 | ; This file is part of avrcpm. | |
7 | ; | |
8 | ; avrcpm is free software: you can redistribute it and/or modify it | |
9 | ; under the terms of the GNU General Public License as published by | |
10 | ; the Free Software Foundation, either version 3 of the License, or | |
11 | ; (at your option) any later version. | |
12 | ; | |
13 | ; avrcpm is distributed in the hope that it will be useful, | |
14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | ; GNU General Public License for more details. | |
17 | ; | |
18 | ; You should have received a copy of the GNU General Public License | |
19 | ; along with avrcpm. If not, see <http://www.gnu.org/licenses/>. | |
20 | ; | |
21 | ; $Id$ | |
22 | ; | |
23 | ||
24 | ||
25 | ; -------------------------- Defines for the disk management Structures | |
26 | ||
27 | ; Partition Table Structures | |
28 | ||
29 | #define PART_TYPE 4 | |
30 | #define PART_START 8 | |
31 | #define PART_SIZE 12 | |
32 | ||
33 | /* | |
34 | * Partition table id | |
35 | * (see http://www.win.tue.nl/~aeb/partitions/partition_types-1.html) | |
36 | */ | |
37 | #define PARTID1_FAT16 0x0E | |
38 | #define PARTID2_FAT16 0x06 | |
39 | #define PARTID_CPM 0x52 | |
40 | ||
41 | ||
42 | ; ------------------------------------------------ Start of Code Segment | |
43 | .cseg | |
44 | ||
45 | ; ==================================================================== | |
46 | ; Function: Scans a Disk for CP/M Partions | |
47 | ; ==================================================================== | |
48 | ; Parameters | |
49 | ; -------------------------------------------------------------------- | |
50 | ; | |
51 | ; Registers : [w] temp Number of disk images (raw and fat16) found. | |
52 | ; + 0x80 if sd card changes. (not used, doesn't work) | |
53 | ; SREG : Z according to temp | |
54 | ; -------------------------------------------------------------------- | |
55 | ; Description: | |
56 | ; This Function scans an SD-Cards Boot-Sector for valid Partitions. | |
57 | ; First all original CP/M Partitions will be usesed as Drives for | |
58 | ; the CPM-System. Wenn all CP/M Partitions are found, a second | |
59 | ; scann will be made. In the second Scan, the first FAT16 Partition | |
60 | ; on the Disk will be used for a detailed analyses. If there | |
61 | ; are any Files like "cpm_x.img" are found, these Files will be | |
62 | ; used as Disks by the CP/M- System. ( x must be in the Range A to D ) | |
63 | ; ==================================================================== | |
64 | mgr_init_partitions: | |
65 | ||
66 | sts ndisks,_0 ; Set Number of Disks to 0 | |
67 | ||
68 | ; Initialize partition table | |
69 | ldiw y,hostparttbl | |
70 | ldi temp2,PARTENTRY_SIZE*MAXDISKS | |
71 | mgr_picl: | |
72 | st y+,_0 | |
73 | dec temp2 | |
74 | brne mgr_picl | |
75 | ||
76 | ; Start mmc Card interaction | |
77 | lcall mmcInit | |
78 | andi temp,MMCST_NOINIT & MMCST_NODISK | |
79 | brne mgr_pierr | |
80 | ||
81 | ;Load first sector from MMC (boot sector) | |
82 | ldiw y,0 ; Sector 0 | |
83 | movw x,y | |
84 | lcall mmcReadSect | |
85 | tst temp | |
86 | breq mgr_check_bootsektor | |
87 | ||
88 | mgr_pierr: | |
89 | clr temp | |
90 | ret | |
91 | ||
92 | mgr_check_bootsektor: | |
93 | ;Pointer to first table entry | |
94 | ldiw y,hostparttbl | |
95 | ldi temp3,0 ;temp3 holds number of found disks (paritions) | |
96 | ||
97 | ;Test, if it has a valid MBR | |
98 | ||
99 | lds temp,hostbuf+510 ;MBR signature (0xAA55) at and of sector? | |
100 | lds temp2,hostbuf+510+1 | |
101 | ldi temp4,0xAA | |
102 | cpi temp,0x55 | |
103 | cpc temp2,temp4 | |
104 | breq mgr_search | |
105 | ||
106 | ;No MBR, no partition table ... | |
107 | ||
108 | inc temp3 ;pretend we have one. | |
109 | sts ndisks,temp3 | |
110 | ldi temp,high((1<<16) * 128/512) | |
111 | ldi temp2,dskType_CPM | |
112 | std y+0,temp2 | |
113 | std y+1,_0 ;start at beginning of card | |
114 | std y+2,_0 | |
115 | std y+3,_0 | |
116 | std y+4,_0 | |
117 | std y+5,_0 ;max CP/M 2.2 disk size | |
118 | std y+6,temp ; | |
119 | ; std y+7,_0 | |
120 | ; std y+8,_0 | |
121 | rjmp mgr_pend | |
122 | ||
123 | ; Search for valid Partitions and ImageFiles | |
124 | mgr_search: | |
125 | ldiw z,hostbuf+510-64 ;Point to first byte of partition table | |
126 | ldi temp4,4 ;Partition table has 4 entries. | |
127 | ||
128 | mgr_ploop: | |
129 | ||
130 | ; Get Partitiontype | |
131 | ldd temp,z+PART_TYPE | |
132 | ||
133 | ; Test for CP/M Partition | |
134 | cpi temp,PARTID_CPM | |
135 | brne mgr_nextp | |
136 | ||
137 | rcall cpm_add_partition | |
138 | ||
139 | inc temp3 | |
140 | sts ndisks,temp3 | |
141 | adiw y,PARTENTRY_SIZE | |
142 | cpi temp3,MAXDISKS | |
143 | breq mgr_pend | |
144 | ||
145 | mgr_nextp: | |
146 | adiw zl,16 | |
147 | dec temp4 | |
148 | brne mgr_ploop | |
149 | ||
150 | #if FAT16_SUPPORT | |
151 | ||
152 | ; Test for FAT16 Partition | |
153 | ldiw z,hostbuf+510-64 ;Point to first byte of partition table | |
154 | ldi temp4,4 | |
155 | ||
156 | mgr_ploop2: | |
157 | ; Get Partitiontype | |
158 | ldd temp,z+PART_TYPE | |
159 | ||
160 | ; Test for FAT Partition Type 1 | |
161 | cpi temp,PARTID1_FAT16 | |
162 | breq mgr_fatfound | |
163 | ||
164 | ; Test for FAT Partition Type 2 | |
165 | cpi temp,PARTID2_FAT16 | |
166 | brne mgr_nextp2 | |
167 | ||
168 | mgr_fatfound: | |
169 | rcall fat_add_partition | |
170 | rcall fat_scan_partition | |
171 | rcall fat_reset_cache | |
172 | rjmp mgr_pend ;Stop after first FAT16 partition found. | |
173 | ||
174 | mgr_nextp2: | |
175 | adiw zl,16 | |
176 | dec temp4 | |
177 | brne mgr_ploop2 | |
178 | #endif | |
179 | ||
180 | mgr_pend: | |
181 | lds temp,ndisks ;return # of "disks" | |
182 | tst temp | |
183 | ret | |
184 | ||
185 | ||
186 | ; ==================================================================== | |
187 | ; Function: Print partition table info | |
188 | ; ==================================================================== | |
189 | ; Parameters | |
190 | ; -------------------------------------------------------------------- | |
191 | ; Registers : none | |
192 | ; Variables : [r] hostparttbl Table with Partitioninformations | |
193 | ; [r] hostparttbltop Pointer to the Top of the Table | |
194 | ; -------------------------------------------------------------------- | |
195 | ; Description: | |
196 | ; ==================================================================== | |
197 | ||
198 | mgr_prnt_parttbl: | |
199 | ldiw z,hostparttbl | |
200 | lds yl,ndisks | |
201 | ldi xh,'A' | |
202 | ||
203 | pprl: | |
204 | ldd temp ,z+1 ;Get partition start | |
205 | ldd temp2,z+2 | |
206 | ldd temp3,z+3 | |
207 | ldd temp4,z+4 | |
208 | ||
209 | printnewline | |
210 | ||
211 | cp temp,_0 ;If zero ... | |
212 | cpc temp2,_0 | |
213 | cpc temp3,_0 | |
214 | cpc temp4,_0 | |
215 | breq mgr_prnop ;... no partition table at 0 | |
216 | ||
217 | ; Partitiontype examining | |
218 | ldd xl,z+0 | |
219 | andi xl,dskType_MASK | |
220 | ; CP/M ? | |
221 | cpi xl,dskType_CPM | |
222 | brne mgr_prtb_nocpm | |
223 | rcall mgr_prnt_diskname | |
224 | rcall mgr_prnt_table_cpm | |
225 | rjmp mgr_prnt_size | |
226 | ||
227 | mgr_prtb_nocpm: | |
228 | #if FAT16_SUPPORT | |
229 | ; FAT16 ? | |
230 | cpi xl,dskType_FAT | |
231 | brne mgr_prtb_nofat | |
232 | rcall mgr_prnt_diskname | |
233 | rcall mgr_prnt_table_fat | |
234 | rjmp mgr_prnt_size | |
235 | mgr_prtb_nofat: | |
236 | #endif | |
237 | #if 0 /* RAMDISK is not on SD card */ | |
238 | ; RAMDISK ? | |
239 | cpi xl,dskType_RAM | |
240 | brne mgr_prnt_err | |
241 | rcall mgr_prnt_diskname | |
242 | rcall mgr_prnt_table_ram | |
243 | rjmp mgr_prnt_size | |
244 | #endif | |
245 | mgr_prnt_err: | |
246 | ; Entry Error | |
247 | rcall mgr_prnt_table_err | |
248 | rjmp mgr_prnt_size | |
249 | ||
250 | mgr_prnop: | |
251 | rcall mgr_prnt_diskname | |
252 | rcall mgr_prnt_image | |
253 | ||
254 | mgr_prnt_size: | |
255 | lcall print_ultoa | |
256 | printstring ", size: " | |
257 | ||
258 | ldd temp ,z+5 ;Get partition size | |
259 | ldd temp2,z+6 | |
260 | ldi temp3,0 | |
261 | ldi temp4,0 | |
262 | ||
263 | lsr temp4 | |
264 | ror temp3 | |
265 | ror temp2 | |
266 | ror temp | |
267 | lcall print_ultoa | |
268 | printstring "KB." | |
269 | ||
270 | mgr_goto_next_part: | |
271 | adiw z,PARTENTRY_SIZE | |
272 | inc xh | |
273 | dec yl | |
274 | brne pprl | |
275 | ||
276 | mgr_pppre: | |
277 | ret | |
278 | ||
279 | ||
280 | mgr_prnt_diskname: | |
281 | push temp | |
282 | mov temp,xh | |
283 | lcall uartputc | |
284 | ldi temp,':' | |
285 | lcall uartputc | |
286 | pop temp | |
287 | ret | |
288 | ||
289 | mgr_prnt_table_cpm: | |
290 | printstring "CP/M partition at: " | |
291 | ret | |
292 | ||
293 | mgr_prnt_table_fat: | |
294 | printstring "FAT16 File-Image at: " | |
295 | ret | |
296 | ||
297 | mgr_prnt_table_ram: | |
298 | printstring "Ramdisk at: " | |
299 | ret | |
300 | ||
301 | mgr_prnt_table_err: | |
302 | printstring "Unknown Entry at: " | |
303 | ret | |
304 | ||
305 | mgr_prnt_image: | |
306 | printstring "Assuming CP/M image at: " | |
307 | ret | |
308 | ||
309 |