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92202636 L |
1 | ; Various Management functions for the Interaction with the File- |
2 | ; systems | |
3 | ; | |
4 | ; Copyright (C) 2010 Frank Zoll | |
e8384f88 | 5 | ; Copyright (C) 2013 Leo C. |
92202636 L |
6 | ; |
7 | ; This file is part of avrcpm. | |
8 | ; | |
9 | ; avrcpm is free software: you can redistribute it and/or modify it | |
10 | ; under the terms of the GNU General Public License as published by | |
11 | ; the Free Software Foundation, either version 3 of the License, or | |
12 | ; (at your option) any later version. | |
13 | ; | |
14 | ; avrcpm is distributed in the hope that it will be useful, | |
15 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ; GNU General Public License for more details. | |
18 | ; | |
19 | ; You should have received a copy of the GNU General Public License | |
20 | ; along with avrcpm. If not, see <http://www.gnu.org/licenses/>. | |
21 | ; | |
22 | ; $Id$ | |
23 | ; | |
24 | ||
25 | ||
92202636 L |
26 | .cseg |
27 | ||
28 | ; ==================================================================== | |
29 | ; Function: Scans a Disk for CP/M Partions | |
30 | ; ==================================================================== | |
31 | ; Parameters | |
32 | ; -------------------------------------------------------------------- | |
33 | ; | |
34 | ; Registers : [w] temp Number of disk images (raw and fat16) found. | |
35 | ; + 0x80 if sd card changes. (not used, doesn't work) | |
36 | ; SREG : Z according to temp | |
37 | ; -------------------------------------------------------------------- | |
38 | ; Description: | |
39 | ; This Function scans an SD-Cards Boot-Sector for valid Partitions. | |
40 | ; First all original CP/M Partitions will be usesed as Drives for | |
41 | ; the CPM-System. Wenn all CP/M Partitions are found, a second | |
42 | ; scann will be made. In the second Scan, the first FAT16 Partition | |
43 | ; on the Disk will be used for a detailed analyses. If there | |
44 | ; are any Files like "cpm_x.img" are found, these Files will be | |
45 | ; used as Disks by the CP/M- System. ( x must be in the Range A to D ) | |
46 | ; ==================================================================== | |
47 | mgr_init_partitions: | |
48 | ||
49 | sts ndisks,_0 ; Set Number of Disks to 0 | |
50 | ||
51 | ; Initialize partition table | |
52 | ldiw y,hostparttbl | |
53 | ldi temp2,PARTENTRY_SIZE*MAXDISKS | |
54 | mgr_picl: | |
55 | st y+,_0 | |
56 | dec temp2 | |
57 | brne mgr_picl | |
58 | ||
59 | ; Start mmc Card interaction | |
60 | lcall mmcInit | |
dc705dc0 | 61 | andi temp,MMCST_NOINIT | MMCST_NODISK |
92202636 L |
62 | brne mgr_pierr |
63 | ||
64 | ;Load first sector from MMC (boot sector) | |
65 | ldiw y,0 ; Sector 0 | |
66 | movw x,y | |
02d57479 | 67 | ldiw z,hostbuf |
92202636 L |
68 | lcall mmcReadSect |
69 | tst temp | |
70 | breq mgr_check_bootsektor | |
71 | ||
72 | mgr_pierr: | |
73 | clr temp | |
74 | ret | |
75 | ||
76 | mgr_check_bootsektor: | |
77 | ;Pointer to first table entry | |
78 | ldiw y,hostparttbl | |
79 | ldi temp3,0 ;temp3 holds number of found disks (paritions) | |
80 | ||
81 | ;Test, if it has a valid MBR | |
82 | ||
83 | lds temp,hostbuf+510 ;MBR signature (0xAA55) at and of sector? | |
92202636 | 84 | cpi temp,0x55 |
825ecc9d L |
85 | lds temp,hostbuf+510+1 |
86 | ldi temp2,0xAA | |
87 | cpc temp,temp2 | |
92202636 L |
88 | breq mgr_search |
89 | ||
90 | ;No MBR, no partition table ... | |
91 | ||
ce520bff L |
92 | #if CPMDSK_SUPPORT |
93 | ||
92202636 L |
94 | inc temp3 ;pretend we have one. |
95 | sts ndisks,temp3 | |
96 | ldi temp,high((1<<16) * 128/512) | |
97 | ldi temp2,dskType_CPM | |
98 | std y+0,temp2 | |
99 | std y+1,_0 ;start at beginning of card | |
100 | std y+2,_0 | |
101 | std y+3,_0 | |
102 | std y+4,_0 | |
103 | std y+5,_0 ;max CP/M 2.2 disk size | |
104 | std y+6,temp ; | |
5482d75f L |
105 | |
106 | ldi temp3,0 | |
107 | rcall dpb_imgdata_get | |
108 | ||
ce520bff L |
109 | #endif /* CPMDSK_SUPPORT */ |
110 | ||
92202636 L |
111 | rjmp mgr_pend |
112 | ||
92202636 | 113 | mgr_search: |
ce520bff L |
114 | |
115 | #if CPMDSK_SUPPORT | |
116 | ||
117 | ; Search for valid Partitions and ImageFiles | |
92202636 | 118 | ldiw z,hostbuf+510-64 ;Point to first byte of partition table |
92202636 L |
119 | |
120 | mgr_ploop: | |
121 | ||
122 | ; Get Partitiontype | |
123 | ldd temp,z+PART_TYPE | |
124 | ||
125 | ; Test for CP/M Partition | |
126 | cpi temp,PARTID_CPM | |
127 | brne mgr_nextp | |
128 | ||
e8384f88 | 129 | lcall cpm_add_partition |
92202636 L |
130 | inc temp3 |
131 | sts ndisks,temp3 | |
637689de | 132 | adiw y,PARTENTRY_SIZE |
92202636 L |
133 | cpi temp3,MAXDISKS |
134 | breq mgr_pend | |
135 | ||
136 | mgr_nextp: | |
5482d75f | 137 | adiw z,16 |
825ecc9d | 138 | cpi zl,low(hostbuf+510) ;End of partition table reached? |
92202636 | 139 | brne mgr_ploop |
ce520bff | 140 | #endif /* CPMDSK_SUPPORT */ |
92202636 L |
141 | |
142 | #if FAT16_SUPPORT | |
143 | ||
144 | ; Test for FAT16 Partition | |
145 | ldiw z,hostbuf+510-64 ;Point to first byte of partition table | |
92202636 L |
146 | |
147 | mgr_ploop2: | |
148 | ; Get Partitiontype | |
149 | ldd temp,z+PART_TYPE | |
150 | ||
151 | ; Test for FAT Partition Type 1 | |
152 | cpi temp,PARTID1_FAT16 | |
153 | breq mgr_fatfound | |
154 | ||
155 | ; Test for FAT Partition Type 2 | |
156 | cpi temp,PARTID2_FAT16 | |
157 | brne mgr_nextp2 | |
158 | ||
159 | mgr_fatfound: | |
160 | rcall fat_add_partition | |
161 | rcall fat_scan_partition | |
162 | rcall fat_reset_cache | |
163 | rjmp mgr_pend ;Stop after first FAT16 partition found. | |
164 | ||
165 | mgr_nextp2: | |
166 | adiw zl,16 | |
825ecc9d | 167 | cpi zl,low(hostbuf+510) |
92202636 | 168 | brne mgr_ploop2 |
ce520bff | 169 | #endif /* FAT16_SUPPORT */ |
92202636 L |
170 | |
171 | mgr_pend: | |
5482d75f L |
172 | clr temp3 |
173 | mgr_imgd_lp: | |
dcd7e502 L |
174 | lds temp,ndisks |
175 | cp temp3,temp | |
5482d75f L |
176 | breq mgr_pend2 |
177 | rcall dpb_imgdata_get | |
178 | inc temp3 | |
5482d75f L |
179 | rjmp mgr_imgd_lp |
180 | ||
181 | mgr_pend2: | |
182 | lds temp,ndisks ;return # of "disks" | |
92202636 L |
183 | tst temp |
184 | ret | |
185 | ||
186 | ||
187 | ; ==================================================================== | |
188 | ; Function: Print partition table info | |
189 | ; ==================================================================== | |
190 | ; Parameters | |
191 | ; -------------------------------------------------------------------- | |
192 | ; Registers : none | |
193 | ; Variables : [r] hostparttbl Table with Partitioninformations | |
194 | ; [r] hostparttbltop Pointer to the Top of the Table | |
195 | ; -------------------------------------------------------------------- | |
196 | ; Description: | |
197 | ; ==================================================================== | |
198 | ||
199 | mgr_prnt_parttbl: | |
ce520bff L |
200 | lds yl,ndisks |
201 | tst yl | |
202 | brne ppr_doit | |
203 | ret | |
204 | ||
205 | ppr_doit: | |
dc705dc0 L |
206 | push r15 |
207 | push r14 | |
92202636 | 208 | ldiw z,hostparttbl |
92202636 | 209 | ldi xh,'A' |
92202636 | 210 | pprl: |
92202636 L |
211 | printnewline |
212 | ||
825ecc9d L |
213 | ldd temp ,z+1 ;Get partition start |
214 | ldd temp2,z+2 | |
dc705dc0 L |
215 | ldd r14,z+3 |
216 | ldd r15,z+4 | |
217 | ||
ce520bff L |
218 | ; Partitiontype examining |
219 | ||
220 | ldd xl,z+0 | |
221 | andi xl,dskType_MASK | |
222 | ||
223 | #if CPMDSK_SUPPORT | |
224 | ||
dc705dc0 L |
225 | cp temp,_0 ;If zero ... |
226 | cpc temp2,_0 | |
227 | cpc r14,_0 | |
228 | cpc r15,_0 | |
ce520bff | 229 | brne mgr_prchkcpm ;... no partition table at 0 |
92202636 | 230 | |
ce520bff L |
231 | rcall mgr_prnt_diskname |
232 | rcall mgr_prnt_image | |
233 | rjmp mgr_prnt_size | |
234 | ||
235 | mgr_prchkcpm: | |
92202636 L |
236 | ; CP/M ? |
237 | cpi xl,dskType_CPM | |
238 | brne mgr_prtb_nocpm | |
239 | rcall mgr_prnt_diskname | |
240 | rcall mgr_prnt_table_cpm | |
241 | rjmp mgr_prnt_size | |
92202636 | 242 | mgr_prtb_nocpm: |
ce520bff L |
243 | #endif |
244 | ||
92202636 L |
245 | #if FAT16_SUPPORT |
246 | ; FAT16 ? | |
247 | cpi xl,dskType_FAT | |
248 | brne mgr_prtb_nofat | |
249 | rcall mgr_prnt_diskname | |
250 | rcall mgr_prnt_table_fat | |
251 | rjmp mgr_prnt_size | |
252 | mgr_prtb_nofat: | |
253 | #endif | |
ce520bff | 254 | |
92202636 | 255 | #if 0 /* RAMDISK is not on SD card */ |
ce520bff | 256 | #if RAMDISKCNT |
92202636 L |
257 | ; RAMDISK ? |
258 | cpi xl,dskType_RAM | |
ce520bff | 259 | brne mgr_prnt_noramdisk |
92202636 L |
260 | rcall mgr_prnt_diskname |
261 | rcall mgr_prnt_table_ram | |
262 | rjmp mgr_prnt_size | |
ce520bff L |
263 | mgr_prnt_noramdisk: |
264 | #endif | |
92202636 | 265 | #endif |
ce520bff | 266 | |
92202636 L |
267 | ; Entry Error |
268 | rcall mgr_prnt_table_err | |
92202636 L |
269 | |
270 | mgr_prnt_size: | |
271 | lcall print_ultoa | |
272 | printstring ", size: " | |
273 | ||
274 | ldd temp ,z+5 ;Get partition size | |
275 | ldd temp2,z+6 | |
825ecc9d L |
276 | clr r14 |
277 | clr r15 | |
278 | lsr temp2 | |
92202636 L |
279 | ror temp |
280 | lcall print_ultoa | |
281 | printstring "KB." | |
282 | ||
283 | mgr_goto_next_part: | |
284 | adiw z,PARTENTRY_SIZE | |
285 | inc xh | |
286 | dec yl | |
287 | brne pprl | |
288 | ||
289 | mgr_pppre: | |
dc705dc0 L |
290 | pop r14 |
291 | pop r15 | |
92202636 L |
292 | ret |
293 | ||
294 | ||
92202636 L |
295 | mgr_prnt_diskname: |
296 | push temp | |
297 | mov temp,xh | |
298 | lcall uartputc | |
96a054ef | 299 | printstring ": " |
92202636 L |
300 | pop temp |
301 | ret | |
302 | ||
ce520bff | 303 | #if CPMDSK_SUPPORT |
92202636 L |
304 | mgr_prnt_table_cpm: |
305 | printstring "CP/M partition at: " | |
306 | ret | |
307 | ||
ce520bff L |
308 | mgr_prnt_image: |
309 | printstring "Assuming CP/M image at: " | |
310 | ret | |
311 | #endif | |
312 | ||
313 | #if FAT16_SUPPORT | |
92202636 | 314 | mgr_prnt_table_fat: |
96a054ef L |
315 | printstring "FAT16 File-Image '" |
316 | push temp | |
317 | mov temp,r14 | |
318 | lcall uartputc | |
319 | clr r14 | |
320 | pop temp | |
321 | printstring "' at: " | |
92202636 | 322 | ret |
ce520bff | 323 | #endif |
92202636 | 324 | |
ce520bff | 325 | #if RAMDISKCNT |
92202636 L |
326 | mgr_prnt_table_ram: |
327 | printstring "Ramdisk at: " | |
328 | ret | |
ce520bff | 329 | #endif |
92202636 L |
330 | |
331 | mgr_prnt_table_err: | |
332 | printstring "Unknown Entry at: " | |
333 | ret | |
334 | ||
92202636 | 335 |