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1da177e4 LT |
1 | /* -*- mode: asm -*- |
2 | ** | |
3 | ** head.S -- This file contains the initial boot code for the | |
4 | ** Linux/68k kernel. | |
5 | ** | |
6 | ** Copyright 1993 by Hamish Macdonald | |
7 | ** | |
8 | ** 68040 fixes by Michael Rausch | |
9 | ** 68060 fixes by Roman Hodek | |
10 | ** MMU cleanup by Randy Thelen | |
11 | ** Final MMU cleanup by Roman Zippel | |
12 | ** | |
13 | ** Atari support by Andreas Schwab, using ideas of Robert de Vries | |
14 | ** and Bjoern Brauel | |
15 | ** VME Support by Richard Hirst | |
16 | ** | |
17 | ** 94/11/14 Andreas Schwab: put kernel at PAGESIZE | |
18 | ** 94/11/18 Andreas Schwab: remove identity mapping of STRAM for Atari | |
19 | ** ++ Bjoern & Roman: ATARI-68040 support for the Medusa | |
20 | ** 95/11/18 Richard Hirst: Added MVME166 support | |
21 | ** 96/04/26 Guenther Kelleter: fixed identity mapping for Falcon with | |
22 | ** Magnum- and FX-alternate ram | |
23 | ** 98/04/25 Phil Blundell: added HP300 support | |
24 | ** 1998/08/30 David Kilzer: Added support for font_desc structures | |
25 | ** for linux-2.1.115 | |
26 | ** 9/02/11 Richard Zidlicky: added Q40 support (initial vesion 99/01/01) | |
27 | ** 2004/05/13 Kars de Jong: Finalised HP300 support | |
28 | ** | |
29 | ** This file is subject to the terms and conditions of the GNU General Public | |
30 | ** License. See the file README.legal in the main directory of this archive | |
31 | ** for more details. | |
32 | ** | |
33 | */ | |
34 | ||
35 | /* | |
36 | * Linux startup code. | |
37 | * | |
38 | * At this point, the boot loader has: | |
39 | * Disabled interrupts | |
40 | * Disabled caches | |
41 | * Put us in supervisor state. | |
42 | * | |
43 | * The kernel setup code takes the following steps: | |
44 | * . Raise interrupt level | |
45 | * . Set up initial kernel memory mapping. | |
46 | * . This sets up a mapping of the 4M of memory the kernel is located in. | |
47 | * . It also does a mapping of any initial machine specific areas. | |
48 | * . Enable the MMU | |
49 | * . Enable cache memories | |
50 | * . Jump to kernel startup | |
51 | * | |
52 | * Much of the file restructuring was to accomplish: | |
53 | * 1) Remove register dependency through-out the file. | |
54 | * 2) Increase use of subroutines to perform functions | |
55 | * 3) Increase readability of the code | |
56 | * | |
57 | * Of course, readability is a subjective issue, so it will never be | |
58 | * argued that that goal was accomplished. It was merely a goal. | |
59 | * A key way to help make code more readable is to give good | |
60 | * documentation. So, the first thing you will find is exaustive | |
61 | * write-ups on the structure of the file, and the features of the | |
62 | * functional subroutines. | |
63 | * | |
64 | * General Structure: | |
65 | * ------------------ | |
66 | * Without a doubt the single largest chunk of head.S is spent | |
67 | * mapping the kernel and I/O physical space into the logical range | |
68 | * for the kernel. | |
69 | * There are new subroutines and data structures to make MMU | |
70 | * support cleaner and easier to understand. | |
71 | * First, you will find a routine call "mmu_map" which maps | |
72 | * a logical to a physical region for some length given a cache | |
73 | * type on behalf of the caller. This routine makes writing the | |
74 | * actual per-machine specific code very simple. | |
75 | * A central part of the code, but not a subroutine in itself, | |
76 | * is the mmu_init code which is broken down into mapping the kernel | |
77 | * (the same for all machines) and mapping machine-specific I/O | |
78 | * regions. | |
79 | * Also, there will be a description of engaging the MMU and | |
80 | * caches. | |
81 | * You will notice that there is a chunk of code which | |
82 | * can emit the entire MMU mapping of the machine. This is present | |
83 | * only in debug modes and can be very helpful. | |
84 | * Further, there is a new console driver in head.S that is | |
85 | * also only engaged in debug mode. Currently, it's only supported | |
86 | * on the Macintosh class of machines. However, it is hoped that | |
87 | * others will plug-in support for specific machines. | |
88 | * | |
89 | * ###################################################################### | |
90 | * | |
91 | * mmu_map | |
92 | * ------- | |
93 | * mmu_map was written for two key reasons. First, it was clear | |
94 | * that it was very difficult to read the previous code for mapping | |
95 | * regions of memory. Second, the Macintosh required such extensive | |
96 | * memory allocations that it didn't make sense to propagate the | |
97 | * existing code any further. | |
98 | * mmu_map requires some parameters: | |
99 | * | |
100 | * mmu_map (logical, physical, length, cache_type) | |
101 | * | |
102 | * While this essentially describes the function in the abstract, you'll | |
103 | * find more indepth description of other parameters at the implementation site. | |
104 | * | |
105 | * mmu_get_root_table_entry | |
106 | * ------------------------ | |
107 | * mmu_get_ptr_table_entry | |
108 | * ----------------------- | |
109 | * mmu_get_page_table_entry | |
110 | * ------------------------ | |
111 | * | |
112 | * These routines are used by other mmu routines to get a pointer into | |
113 | * a table, if necessary a new table is allocated. These routines are working | |
114 | * basically like pmd_alloc() and pte_alloc() in <asm/pgtable.h>. The root | |
115 | * table needs of course only to be allocated once in mmu_get_root_table_entry, | |
116 | * so that here also some mmu specific initialization is done. The second page | |
117 | * at the start of the kernel (the first page is unmapped later) is used for | |
118 | * the kernel_pg_dir. It must be at a position known at link time (as it's used | |
119 | * to initialize the init task struct) and since it needs special cache | |
120 | * settings, it's the easiest to use this page, the rest of the page is used | |
121 | * for further pointer tables. | |
122 | * mmu_get_page_table_entry allocates always a whole page for page tables, this | |
123 | * means 1024 pages and so 4MB of memory can be mapped. It doesn't make sense | |
124 | * to manage page tables in smaller pieces as nearly all mappings have that | |
125 | * size. | |
126 | * | |
127 | * ###################################################################### | |
128 | * | |
129 | * | |
130 | * ###################################################################### | |
131 | * | |
132 | * mmu_engage | |
133 | * ---------- | |
134 | * Thanks to a small helping routine enabling the mmu got quite simple | |
135 | * and there is only one way left. mmu_engage makes a complete a new mapping | |
136 | * that only includes the absolute necessary to be able to jump to the final | |
137 | * postion and to restore the original mapping. | |
138 | * As this code doesn't need a transparent translation register anymore this | |
139 | * means all registers are free to be used by machines that needs them for | |
140 | * other purposes. | |
141 | * | |
142 | * ###################################################################### | |
143 | * | |
144 | * mmu_print | |
145 | * --------- | |
146 | * This algorithm will print out the page tables of the system as | |
147 | * appropriate for an 030 or an 040. This is useful for debugging purposes | |
148 | * and as such is enclosed in #ifdef MMU_PRINT/#endif clauses. | |
149 | * | |
150 | * ###################################################################### | |
151 | * | |
152 | * console_init | |
153 | * ------------ | |
154 | * The console is also able to be turned off. The console in head.S | |
155 | * is specifically for debugging and can be very useful. It is surrounded by | |
156 | * #ifdef CONSOLE/#endif clauses so it doesn't have to ship in known-good | |
157 | * kernels. It's basic algorithm is to determine the size of the screen | |
158 | * (in height/width and bit depth) and then use that information for | |
159 | * displaying an 8x8 font or an 8x16 (widthxheight). I prefer the 8x8 for | |
160 | * debugging so I can see more good data. But it was trivial to add support | |
161 | * for both fonts, so I included it. | |
162 | * Also, the algorithm for plotting pixels is abstracted so that in | |
163 | * theory other platforms could add support for different kinds of frame | |
164 | * buffers. This could be very useful. | |
165 | * | |
166 | * console_put_penguin | |
167 | * ------------------- | |
168 | * An important part of any Linux bring up is the penguin and there's | |
169 | * nothing like getting the Penguin on the screen! This algorithm will work | |
170 | * on any machine for which there is a console_plot_pixel. | |
171 | * | |
172 | * console_scroll | |
173 | * -------------- | |
174 | * My hope is that the scroll algorithm does the right thing on the | |
175 | * various platforms, but it wouldn't be hard to add the test conditions | |
176 | * and new code if it doesn't. | |
177 | * | |
178 | * console_putc | |
179 | * ------------- | |
180 | * | |
181 | * ###################################################################### | |
182 | * | |
183 | * Register usage has greatly simplified within head.S. Every subroutine | |
184 | * saves and restores all registers that it modifies (except it returns a | |
185 | * value in there of course). So the only register that needs to be initialized | |
186 | * is the stack pointer. | |
187 | * All other init code and data is now placed in the init section, so it will | |
188 | * be automatically freed at the end of the kernel initialization. | |
189 | * | |
190 | * ###################################################################### | |
191 | * | |
192 | * options | |
193 | * ------- | |
194 | * There are many options available in a build of this file. I've | |
195 | * taken the time to describe them here to save you the time of searching | |
196 | * for them and trying to understand what they mean. | |
197 | * | |
198 | * CONFIG_xxx: These are the obvious machine configuration defines created | |
199 | * during configuration. These are defined in include/linux/autoconf.h. | |
200 | * | |
201 | * CONSOLE: There is support for head.S console in this file. This | |
202 | * console can talk to a Mac frame buffer, but could easily be extrapolated | |
203 | * to extend it to support other platforms. | |
204 | * | |
205 | * TEST_MMU: This is a test harness for running on any given machine but | |
206 | * getting an MMU dump for another class of machine. The classes of machines | |
207 | * that can be tested are any of the makes (Atari, Amiga, Mac, VME, etc.) | |
208 | * and any of the models (030, 040, 060, etc.). | |
209 | * | |
210 | * NOTE: TEST_MMU is NOT permanent! It is scheduled to be removed | |
211 | * When head.S boots on Atari, Amiga, Macintosh, and VME | |
212 | * machines. At that point the underlying logic will be | |
213 | * believed to be solid enough to be trusted, and TEST_MMU | |
214 | * can be dropped. Do note that that will clean up the | |
215 | * head.S code significantly as large blocks of #if/#else | |
216 | * clauses can be removed. | |
217 | * | |
218 | * MMU_NOCACHE_KERNEL: On the Macintosh platform there was an inquiry into | |
219 | * determing why devices don't appear to work. A test case was to remove | |
220 | * the cacheability of the kernel bits. | |
221 | * | |
222 | * MMU_PRINT: There is a routine built into head.S that can display the | |
223 | * MMU data structures. It outputs its result through the serial_putc | |
224 | * interface. So where ever that winds up driving data, that's where the | |
225 | * mmu struct will appear. On the Macintosh that's typically the console. | |
226 | * | |
227 | * SERIAL_DEBUG: There are a series of putc() macro statements | |
228 | * scattered through out the code to give progress of status to the | |
229 | * person sitting at the console. This constant determines whether those | |
230 | * are used. | |
231 | * | |
232 | * DEBUG: This is the standard DEBUG flag that can be set for building | |
233 | * the kernel. It has the effect adding additional tests into | |
234 | * the code. | |
235 | * | |
236 | * FONT_6x11: | |
237 | * FONT_8x8: | |
238 | * FONT_8x16: | |
239 | * In theory these could be determined at run time or handed | |
240 | * over by the booter. But, let's be real, it's a fine hard | |
241 | * coded value. (But, you will notice the code is run-time | |
242 | * flexible!) A pointer to the font's struct font_desc | |
243 | * is kept locally in Lconsole_font. It is used to determine | |
244 | * font size information dynamically. | |
245 | * | |
246 | * Atari constants: | |
247 | * USE_PRINTER: Use the printer port for serial debug. | |
248 | * USE_SCC_B: Use the SCC port A (Serial2) for serial debug. | |
249 | * USE_SCC_A: Use the SCC port B (Modem2) for serial debug. | |
250 | * USE_MFP: Use the ST-MFP port (Modem1) for serial debug. | |
251 | * | |
252 | * Macintosh constants: | |
253 | * MAC_SERIAL_DEBUG: Turns on serial debug output for the Macintosh. | |
254 | * MAC_USE_SCC_A: Use the SCC port A (modem) for serial debug. | |
255 | * MAC_USE_SCC_B: Use the SCC port B (printer) for serial debug (default). | |
256 | */ | |
257 | ||
1da177e4 LT |
258 | #include <linux/linkage.h> |
259 | #include <linux/init.h> | |
260 | #include <asm/bootinfo.h> | |
261 | #include <asm/setup.h> | |
262 | #include <asm/entry.h> | |
263 | #include <asm/pgtable.h> | |
264 | #include <asm/page.h> | |
0013a854 | 265 | #include <asm/asm-offsets.h> |
1da177e4 LT |
266 | |
267 | #ifdef CONFIG_MAC | |
268 | ||
269 | #include <asm/machw.h> | |
270 | ||
271 | /* | |
272 | * Macintosh console support | |
273 | */ | |
274 | ||
a2d823bf | 275 | #ifdef CONFIG_FRAMEBUFFER_CONSOLE |
1da177e4 LT |
276 | #define CONSOLE |
277 | #define CONSOLE_PENGUIN | |
a2d823bf | 278 | #endif |
1da177e4 LT |
279 | |
280 | /* | |
281 | * Macintosh serial debug support; outputs boot info to the printer | |
282 | * and/or modem serial ports | |
283 | */ | |
284 | #undef MAC_SERIAL_DEBUG | |
285 | ||
286 | /* | |
287 | * Macintosh serial debug port selection; define one or both; | |
288 | * requires MAC_SERIAL_DEBUG to be defined | |
289 | */ | |
290 | #define MAC_USE_SCC_A /* Macintosh modem serial port */ | |
291 | #define MAC_USE_SCC_B /* Macintosh printer serial port */ | |
292 | ||
293 | #endif /* CONFIG_MAC */ | |
294 | ||
295 | #undef MMU_PRINT | |
296 | #undef MMU_NOCACHE_KERNEL | |
297 | #define SERIAL_DEBUG | |
298 | #undef DEBUG | |
299 | ||
300 | /* | |
301 | * For the head.S console, there are three supported fonts, 6x11, 8x16 and 8x8. | |
302 | * The 8x8 font is harder to read but fits more on the screen. | |
303 | */ | |
304 | #define FONT_8x8 /* default */ | |
305 | /* #define FONT_8x16 */ /* 2nd choice */ | |
306 | /* #define FONT_6x11 */ /* 3rd choice */ | |
307 | ||
308 | .globl kernel_pg_dir | |
309 | .globl availmem | |
310 | .globl m68k_pgtable_cachemode | |
311 | .globl m68k_supervisor_cachemode | |
312 | #ifdef CONFIG_MVME16x | |
313 | .globl mvme_bdid | |
314 | #endif | |
315 | #ifdef CONFIG_Q40 | |
316 | .globl q40_mem_cptr | |
317 | #endif | |
318 | ||
319 | CPUTYPE_040 = 1 /* indicates an 040 */ | |
320 | CPUTYPE_060 = 2 /* indicates an 060 */ | |
321 | CPUTYPE_0460 = 3 /* if either above are set, this is set */ | |
322 | CPUTYPE_020 = 4 /* indicates an 020 */ | |
323 | ||
324 | /* Translation control register */ | |
325 | TC_ENABLE = 0x8000 | |
326 | TC_PAGE8K = 0x4000 | |
327 | TC_PAGE4K = 0x0000 | |
328 | ||
329 | /* Transparent translation registers */ | |
330 | TTR_ENABLE = 0x8000 /* enable transparent translation */ | |
331 | TTR_ANYMODE = 0x4000 /* user and kernel mode access */ | |
332 | TTR_KERNELMODE = 0x2000 /* only kernel mode access */ | |
333 | TTR_USERMODE = 0x0000 /* only user mode access */ | |
334 | TTR_CI = 0x0400 /* inhibit cache */ | |
335 | TTR_RW = 0x0200 /* read/write mode */ | |
336 | TTR_RWM = 0x0100 /* read/write mask */ | |
337 | TTR_FCB2 = 0x0040 /* function code base bit 2 */ | |
338 | TTR_FCB1 = 0x0020 /* function code base bit 1 */ | |
339 | TTR_FCB0 = 0x0010 /* function code base bit 0 */ | |
340 | TTR_FCM2 = 0x0004 /* function code mask bit 2 */ | |
341 | TTR_FCM1 = 0x0002 /* function code mask bit 1 */ | |
342 | TTR_FCM0 = 0x0001 /* function code mask bit 0 */ | |
343 | ||
344 | /* Cache Control registers */ | |
345 | CC6_ENABLE_D = 0x80000000 /* enable data cache (680[46]0) */ | |
346 | CC6_FREEZE_D = 0x40000000 /* freeze data cache (68060) */ | |
347 | CC6_ENABLE_SB = 0x20000000 /* enable store buffer (68060) */ | |
348 | CC6_PUSH_DPI = 0x10000000 /* disable CPUSH invalidation (68060) */ | |
349 | CC6_HALF_D = 0x08000000 /* half-cache mode for data cache (68060) */ | |
350 | CC6_ENABLE_B = 0x00800000 /* enable branch cache (68060) */ | |
351 | CC6_CLRA_B = 0x00400000 /* clear all entries in branch cache (68060) */ | |
352 | CC6_CLRU_B = 0x00200000 /* clear user entries in branch cache (68060) */ | |
353 | CC6_ENABLE_I = 0x00008000 /* enable instruction cache (680[46]0) */ | |
354 | CC6_FREEZE_I = 0x00004000 /* freeze instruction cache (68060) */ | |
355 | CC6_HALF_I = 0x00002000 /* half-cache mode for instruction cache (68060) */ | |
356 | CC3_ALLOC_WRITE = 0x00002000 /* write allocate mode(68030) */ | |
357 | CC3_ENABLE_DB = 0x00001000 /* enable data burst (68030) */ | |
358 | CC3_CLR_D = 0x00000800 /* clear data cache (68030) */ | |
359 | CC3_CLRE_D = 0x00000400 /* clear entry in data cache (68030) */ | |
360 | CC3_FREEZE_D = 0x00000200 /* freeze data cache (68030) */ | |
361 | CC3_ENABLE_D = 0x00000100 /* enable data cache (68030) */ | |
362 | CC3_ENABLE_IB = 0x00000010 /* enable instruction burst (68030) */ | |
363 | CC3_CLR_I = 0x00000008 /* clear instruction cache (68030) */ | |
364 | CC3_CLRE_I = 0x00000004 /* clear entry in instruction cache (68030) */ | |
365 | CC3_FREEZE_I = 0x00000002 /* freeze instruction cache (68030) */ | |
366 | CC3_ENABLE_I = 0x00000001 /* enable instruction cache (68030) */ | |
367 | ||
368 | /* Miscellaneous definitions */ | |
369 | PAGESIZE = 4096 | |
370 | PAGESHIFT = 12 | |
371 | ||
372 | ROOT_TABLE_SIZE = 128 | |
373 | PTR_TABLE_SIZE = 128 | |
374 | PAGE_TABLE_SIZE = 64 | |
375 | ROOT_INDEX_SHIFT = 25 | |
376 | PTR_INDEX_SHIFT = 18 | |
377 | PAGE_INDEX_SHIFT = 12 | |
378 | ||
379 | #ifdef DEBUG | |
380 | /* When debugging use readable names for labels */ | |
381 | #ifdef __STDC__ | |
382 | #define L(name) .head.S.##name | |
383 | #else | |
384 | #define L(name) .head.S./**/name | |
385 | #endif | |
386 | #else | |
387 | #ifdef __STDC__ | |
388 | #define L(name) .L##name | |
389 | #else | |
390 | #define L(name) .L/**/name | |
391 | #endif | |
392 | #endif | |
393 | ||
394 | /* The __INITDATA stuff is a no-op when ftrace or kgdb are turned on */ | |
395 | #ifndef __INITDATA | |
396 | #define __INITDATA .data | |
397 | #define __FINIT .previous | |
398 | #endif | |
399 | ||
400 | /* Several macros to make the writing of subroutines easier: | |
401 | * - func_start marks the beginning of the routine which setups the frame | |
402 | * register and saves the registers, it also defines another macro | |
403 | * to automatically restore the registers again. | |
404 | * - func_return marks the end of the routine and simply calls the prepared | |
405 | * macro to restore registers and jump back to the caller. | |
406 | * - func_define generates another macro to automatically put arguments | |
407 | * onto the stack call the subroutine and cleanup the stack again. | |
408 | */ | |
409 | ||
410 | /* Within subroutines these macros can be used to access the arguments | |
411 | * on the stack. With STACK some allocated memory on the stack can be | |
412 | * accessed and ARG0 points to the return address (used by mmu_engage). | |
413 | */ | |
414 | #define STACK %a6@(stackstart) | |
415 | #define ARG0 %a6@(4) | |
416 | #define ARG1 %a6@(8) | |
417 | #define ARG2 %a6@(12) | |
418 | #define ARG3 %a6@(16) | |
419 | #define ARG4 %a6@(20) | |
420 | ||
421 | .macro func_start name,saveregs,stack=0 | |
422 | L(\name): | |
423 | linkw %a6,#-\stack | |
424 | moveml \saveregs,%sp@- | |
425 | .set stackstart,-\stack | |
426 | ||
427 | .macro func_return_\name | |
428 | moveml %sp@+,\saveregs | |
429 | unlk %a6 | |
430 | rts | |
431 | .endm | |
432 | .endm | |
433 | ||
434 | .macro func_return name | |
435 | func_return_\name | |
436 | .endm | |
437 | ||
438 | .macro func_call name | |
439 | jbsr L(\name) | |
440 | .endm | |
441 | ||
442 | .macro move_stack nr,arg1,arg2,arg3,arg4 | |
443 | .if \nr | |
444 | move_stack "(\nr-1)",\arg2,\arg3,\arg4 | |
445 | movel \arg1,%sp@- | |
446 | .endif | |
447 | .endm | |
448 | ||
449 | .macro func_define name,nr=0 | |
450 | .macro \name arg1,arg2,arg3,arg4 | |
451 | move_stack \nr,\arg1,\arg2,\arg3,\arg4 | |
452 | func_call \name | |
453 | .if \nr | |
454 | lea %sp@(\nr*4),%sp | |
455 | .endif | |
456 | .endm | |
457 | .endm | |
458 | ||
459 | func_define mmu_map,4 | |
460 | func_define mmu_map_tt,4 | |
461 | func_define mmu_fixup_page_mmu_cache,1 | |
462 | func_define mmu_temp_map,2 | |
463 | func_define mmu_engage | |
464 | func_define mmu_get_root_table_entry,1 | |
465 | func_define mmu_get_ptr_table_entry,2 | |
466 | func_define mmu_get_page_table_entry,2 | |
467 | func_define mmu_print | |
468 | func_define get_new_page | |
469 | #if defined(CONFIG_HP300) || defined(CONFIG_APOLLO) | |
470 | func_define set_leds | |
471 | #endif | |
472 | ||
473 | .macro mmu_map_eq arg1,arg2,arg3 | |
474 | mmu_map \arg1,\arg1,\arg2,\arg3 | |
475 | .endm | |
476 | ||
477 | .macro get_bi_record record | |
478 | pea \record | |
479 | func_call get_bi_record | |
480 | addql #4,%sp | |
481 | .endm | |
482 | ||
483 | func_define serial_putc,1 | |
484 | func_define console_putc,1 | |
485 | ||
486 | func_define console_init | |
487 | func_define console_put_stats | |
488 | func_define console_put_penguin | |
489 | func_define console_plot_pixel,3 | |
490 | func_define console_scroll | |
491 | ||
492 | .macro putc ch | |
493 | #if defined(CONSOLE) || defined(SERIAL_DEBUG) | |
494 | pea \ch | |
495 | #endif | |
496 | #ifdef CONSOLE | |
497 | func_call console_putc | |
498 | #endif | |
499 | #ifdef SERIAL_DEBUG | |
500 | func_call serial_putc | |
501 | #endif | |
502 | #if defined(CONSOLE) || defined(SERIAL_DEBUG) | |
503 | addql #4,%sp | |
504 | #endif | |
505 | .endm | |
506 | ||
507 | .macro dputc ch | |
508 | #ifdef DEBUG | |
509 | putc \ch | |
510 | #endif | |
511 | .endm | |
512 | ||
513 | func_define putn,1 | |
514 | ||
515 | .macro dputn nr | |
516 | #ifdef DEBUG | |
517 | putn \nr | |
518 | #endif | |
519 | .endm | |
520 | ||
521 | .macro puts string | |
522 | #if defined(CONSOLE) || defined(SERIAL_DEBUG) | |
523 | __INITDATA | |
524 | .Lstr\@: | |
525 | .string "\string" | |
526 | __FINIT | |
527 | pea %pc@(.Lstr\@) | |
528 | func_call puts | |
529 | addql #4,%sp | |
530 | #endif | |
531 | .endm | |
532 | ||
533 | .macro dputs string | |
534 | #ifdef DEBUG | |
535 | puts "\string" | |
536 | #endif | |
537 | .endm | |
538 | ||
539 | #define is_not_amiga(lab) cmpl &MACH_AMIGA,%pc@(m68k_machtype); jne lab | |
540 | #define is_not_atari(lab) cmpl &MACH_ATARI,%pc@(m68k_machtype); jne lab | |
541 | #define is_not_mac(lab) cmpl &MACH_MAC,%pc@(m68k_machtype); jne lab | |
542 | #define is_not_mvme147(lab) cmpl &MACH_MVME147,%pc@(m68k_machtype); jne lab | |
543 | #define is_not_mvme16x(lab) cmpl &MACH_MVME16x,%pc@(m68k_machtype); jne lab | |
544 | #define is_not_bvme6000(lab) cmpl &MACH_BVME6000,%pc@(m68k_machtype); jne lab | |
545 | #define is_mvme147(lab) cmpl &MACH_MVME147,%pc@(m68k_machtype); jeq lab | |
546 | #define is_mvme16x(lab) cmpl &MACH_MVME16x,%pc@(m68k_machtype); jeq lab | |
547 | #define is_bvme6000(lab) cmpl &MACH_BVME6000,%pc@(m68k_machtype); jeq lab | |
548 | #define is_not_hp300(lab) cmpl &MACH_HP300,%pc@(m68k_machtype); jne lab | |
549 | #define is_not_apollo(lab) cmpl &MACH_APOLLO,%pc@(m68k_machtype); jne lab | |
550 | #define is_not_q40(lab) cmpl &MACH_Q40,%pc@(m68k_machtype); jne lab | |
551 | #define is_not_sun3x(lab) cmpl &MACH_SUN3X,%pc@(m68k_machtype); jne lab | |
552 | ||
553 | #define hasnt_leds(lab) cmpl &MACH_HP300,%pc@(m68k_machtype); \ | |
554 | jeq 42f; \ | |
555 | cmpl &MACH_APOLLO,%pc@(m68k_machtype); \ | |
556 | jne lab ;\ | |
557 | 42:\ | |
558 | ||
559 | #define is_040_or_060(lab) btst &CPUTYPE_0460,%pc@(L(cputype)+3); jne lab | |
560 | #define is_not_040_or_060(lab) btst &CPUTYPE_0460,%pc@(L(cputype)+3); jeq lab | |
561 | #define is_040(lab) btst &CPUTYPE_040,%pc@(L(cputype)+3); jne lab | |
562 | #define is_060(lab) btst &CPUTYPE_060,%pc@(L(cputype)+3); jne lab | |
563 | #define is_not_060(lab) btst &CPUTYPE_060,%pc@(L(cputype)+3); jeq lab | |
564 | #define is_020(lab) btst &CPUTYPE_020,%pc@(L(cputype)+3); jne lab | |
565 | #define is_not_020(lab) btst &CPUTYPE_020,%pc@(L(cputype)+3); jeq lab | |
566 | ||
567 | /* On the HP300 we use the on-board LEDs for debug output before | |
568 | the console is running. Writing a 1 bit turns the corresponding LED | |
569 | _off_ - on the 340 bit 7 is towards the back panel of the machine. */ | |
570 | .macro leds mask | |
571 | #if defined(CONFIG_HP300) || defined(CONFIG_APOLLO) | |
572 | hasnt_leds(.Lled\@) | |
573 | pea \mask | |
574 | func_call set_leds | |
575 | addql #4,%sp | |
576 | .Lled\@: | |
577 | #endif | |
578 | .endm | |
579 | ||
7e5de051 | 580 | .section ".text.head","ax" |
1da177e4 LT |
581 | ENTRY(_stext) |
582 | /* | |
583 | * Version numbers of the bootinfo interface | |
584 | * The area from _stext to _start will later be used as kernel pointer table | |
585 | */ | |
586 | bras 1f /* Jump over bootinfo version numbers */ | |
587 | ||
588 | .long BOOTINFOV_MAGIC | |
589 | .long MACH_AMIGA, AMIGA_BOOTI_VERSION | |
590 | .long MACH_ATARI, ATARI_BOOTI_VERSION | |
591 | .long MACH_MVME147, MVME147_BOOTI_VERSION | |
592 | .long MACH_MVME16x, MVME16x_BOOTI_VERSION | |
593 | .long MACH_BVME6000, BVME6000_BOOTI_VERSION | |
594 | .long MACH_MAC, MAC_BOOTI_VERSION | |
595 | .long MACH_Q40, Q40_BOOTI_VERSION | |
596 | .long MACH_HP300, HP300_BOOTI_VERSION | |
597 | .long 0 | |
598 | 1: jra __start | |
599 | ||
600 | .equ kernel_pg_dir,_stext | |
601 | ||
602 | .equ .,_stext+PAGESIZE | |
603 | ||
604 | ENTRY(_start) | |
605 | jra __start | |
606 | __INIT | |
607 | ENTRY(__start) | |
608 | /* | |
609 | * Setup initial stack pointer | |
610 | */ | |
611 | lea %pc@(_stext),%sp | |
612 | ||
613 | /* | |
614 | * Record the CPU and machine type. | |
615 | */ | |
616 | get_bi_record BI_MACHTYPE | |
617 | lea %pc@(m68k_machtype),%a1 | |
618 | movel %a0@,%a1@ | |
619 | ||
620 | get_bi_record BI_FPUTYPE | |
621 | lea %pc@(m68k_fputype),%a1 | |
622 | movel %a0@,%a1@ | |
623 | ||
624 | get_bi_record BI_MMUTYPE | |
625 | lea %pc@(m68k_mmutype),%a1 | |
626 | movel %a0@,%a1@ | |
627 | ||
628 | get_bi_record BI_CPUTYPE | |
629 | lea %pc@(m68k_cputype),%a1 | |
630 | movel %a0@,%a1@ | |
631 | ||
632 | leds 0x1 | |
633 | ||
634 | #ifdef CONFIG_MAC | |
635 | /* | |
636 | * For Macintosh, we need to determine the display parameters early (at least | |
637 | * while debugging it). | |
638 | */ | |
639 | ||
640 | is_not_mac(L(test_notmac)) | |
641 | ||
642 | get_bi_record BI_MAC_VADDR | |
643 | lea %pc@(L(mac_videobase)),%a1 | |
644 | movel %a0@,%a1@ | |
645 | ||
646 | get_bi_record BI_MAC_VDEPTH | |
647 | lea %pc@(L(mac_videodepth)),%a1 | |
648 | movel %a0@,%a1@ | |
649 | ||
650 | get_bi_record BI_MAC_VDIM | |
651 | lea %pc@(L(mac_dimensions)),%a1 | |
652 | movel %a0@,%a1@ | |
653 | ||
654 | get_bi_record BI_MAC_VROW | |
655 | lea %pc@(L(mac_rowbytes)),%a1 | |
656 | movel %a0@,%a1@ | |
657 | ||
658 | #ifdef MAC_SERIAL_DEBUG | |
659 | get_bi_record BI_MAC_SCCBASE | |
660 | lea %pc@(L(mac_sccbase)),%a1 | |
661 | movel %a0@,%a1@ | |
662 | #endif /* MAC_SERIAL_DEBUG */ | |
663 | ||
664 | #if 0 | |
665 | /* | |
666 | * Clear the screen | |
667 | */ | |
668 | lea %pc@(L(mac_videobase)),%a0 | |
669 | movel %a0@,%a1 | |
670 | lea %pc@(L(mac_dimensions)),%a0 | |
671 | movel %a0@,%d1 | |
672 | swap %d1 /* #rows is high bytes */ | |
673 | andl #0xFFFF,%d1 /* rows */ | |
674 | subl #10,%d1 | |
675 | lea %pc@(L(mac_rowbytes)),%a0 | |
676 | loopy2: | |
677 | movel %a0@,%d0 | |
678 | subql #1,%d0 | |
679 | loopx2: | |
680 | moveb #0x55, %a1@+ | |
681 | dbra %d0,loopx2 | |
682 | dbra %d1,loopy2 | |
683 | #endif | |
684 | ||
685 | L(test_notmac): | |
686 | #endif /* CONFIG_MAC */ | |
687 | ||
688 | ||
689 | /* | |
690 | * There are ultimately two pieces of information we want for all kinds of | |
691 | * processors CpuType and CacheBits. The CPUTYPE was passed in from booter | |
692 | * and is converted here from a booter type definition to a separate bit | |
693 | * number which allows for the standard is_0x0 macro tests. | |
694 | */ | |
695 | movel %pc@(m68k_cputype),%d0 | |
696 | /* | |
697 | * Assume it's an 030 | |
698 | */ | |
699 | clrl %d1 | |
700 | ||
701 | /* | |
702 | * Test the BootInfo cputype for 060 | |
703 | */ | |
704 | btst #CPUB_68060,%d0 | |
705 | jeq 1f | |
706 | bset #CPUTYPE_060,%d1 | |
707 | bset #CPUTYPE_0460,%d1 | |
708 | jra 3f | |
709 | 1: | |
710 | /* | |
711 | * Test the BootInfo cputype for 040 | |
712 | */ | |
713 | btst #CPUB_68040,%d0 | |
714 | jeq 2f | |
715 | bset #CPUTYPE_040,%d1 | |
716 | bset #CPUTYPE_0460,%d1 | |
717 | jra 3f | |
718 | 2: | |
719 | /* | |
720 | * Test the BootInfo cputype for 020 | |
721 | */ | |
722 | btst #CPUB_68020,%d0 | |
723 | jeq 3f | |
724 | bset #CPUTYPE_020,%d1 | |
725 | jra 3f | |
726 | 3: | |
727 | /* | |
728 | * Record the cpu type | |
729 | */ | |
730 | lea %pc@(L(cputype)),%a0 | |
731 | movel %d1,%a0@ | |
732 | ||
733 | /* | |
734 | * NOTE: | |
735 | * | |
736 | * Now the macros are valid: | |
737 | * is_040_or_060 | |
738 | * is_not_040_or_060 | |
739 | * is_040 | |
740 | * is_060 | |
741 | * is_not_060 | |
742 | */ | |
743 | ||
744 | /* | |
745 | * Determine the cache mode for pages holding MMU tables | |
746 | * and for supervisor mode, unused for '020 and '030 | |
747 | */ | |
748 | clrl %d0 | |
749 | clrl %d1 | |
750 | ||
751 | is_not_040_or_060(L(save_cachetype)) | |
752 | ||
753 | /* | |
754 | * '040 or '060 | |
755 | * d1 := cacheable write-through | |
756 | * NOTE: The 68040 manual strongly recommends non-cached for MMU tables, | |
757 | * but we have been using write-through since at least 2.0.29 so I | |
758 | * guess it is OK. | |
759 | */ | |
760 | #ifdef CONFIG_060_WRITETHROUGH | |
761 | /* | |
762 | * If this is a 68060 board using drivers with cache coherency | |
763 | * problems, then supervisor memory accesses need to be write-through | |
764 | * also; otherwise, we want copyback. | |
765 | */ | |
766 | ||
767 | is_not_060(1f) | |
768 | movel #_PAGE_CACHE040W,%d0 | |
769 | jra L(save_cachetype) | |
770 | #endif /* CONFIG_060_WRITETHROUGH */ | |
771 | 1: | |
772 | movew #_PAGE_CACHE040,%d0 | |
773 | ||
774 | movel #_PAGE_CACHE040W,%d1 | |
775 | ||
776 | L(save_cachetype): | |
777 | /* Save cache mode for supervisor mode and page tables | |
778 | */ | |
779 | lea %pc@(m68k_supervisor_cachemode),%a0 | |
780 | movel %d0,%a0@ | |
781 | lea %pc@(m68k_pgtable_cachemode),%a0 | |
782 | movel %d1,%a0@ | |
783 | ||
784 | /* | |
785 | * raise interrupt level | |
786 | */ | |
787 | movew #0x2700,%sr | |
788 | ||
789 | /* | |
790 | If running on an Atari, determine the I/O base of the | |
791 | serial port and test if we are running on a Medusa or Hades. | |
792 | This test is necessary here, because on the Hades the serial | |
793 | port is only accessible in the high I/O memory area. | |
794 | ||
795 | The test whether it is a Medusa is done by writing to the byte at | |
796 | phys. 0x0. This should result in a bus error on all other machines. | |
797 | ||
798 | ...should, but doesn't. The Afterburner040 for the Falcon has the | |
799 | same behaviour (0x0..0x7 are no ROM shadow). So we have to do | |
800 | another test to distinguish Medusa and AB040. This is a | |
801 | read attempt for 0x00ff82fe phys. that should bus error on a Falcon | |
802 | (+AB040), but is in the range where the Medusa always asserts DTACK. | |
803 | ||
804 | The test for the Hades is done by reading address 0xb0000000. This | |
805 | should give a bus error on the Medusa. | |
806 | */ | |
807 | ||
808 | #ifdef CONFIG_ATARI | |
809 | is_not_atari(L(notypetest)) | |
810 | ||
811 | /* get special machine type (Medusa/Hades/AB40) */ | |
812 | moveq #0,%d3 /* default if tag doesn't exist */ | |
813 | get_bi_record BI_ATARI_MCH_TYPE | |
814 | tstl %d0 | |
815 | jbmi 1f | |
816 | movel %a0@,%d3 | |
817 | lea %pc@(atari_mch_type),%a0 | |
818 | movel %d3,%a0@ | |
819 | 1: | |
820 | /* On the Hades, the iobase must be set up before opening the | |
821 | * serial port. There are no I/O regs at 0x00ffxxxx at all. */ | |
822 | moveq #0,%d0 | |
823 | cmpl #ATARI_MACH_HADES,%d3 | |
824 | jbne 1f | |
825 | movel #0xff000000,%d0 /* Hades I/O base addr: 0xff000000 */ | |
826 | 1: lea %pc@(L(iobase)),%a0 | |
827 | movel %d0,%a0@ | |
828 | ||
829 | L(notypetest): | |
830 | #endif | |
831 | ||
832 | #ifdef CONFIG_VME | |
833 | is_mvme147(L(getvmetype)) | |
834 | is_bvme6000(L(getvmetype)) | |
835 | is_not_mvme16x(L(gvtdone)) | |
836 | ||
837 | /* See if the loader has specified the BI_VME_TYPE tag. Recent | |
838 | * versions of VMELILO and TFTPLILO do this. We have to do this | |
839 | * early so we know how to handle console output. If the tag | |
840 | * doesn't exist then we use the Bug for output on MVME16x. | |
841 | */ | |
842 | L(getvmetype): | |
843 | get_bi_record BI_VME_TYPE | |
844 | tstl %d0 | |
845 | jbmi 1f | |
846 | movel %a0@,%d3 | |
847 | lea %pc@(vme_brdtype),%a0 | |
848 | movel %d3,%a0@ | |
849 | 1: | |
850 | #ifdef CONFIG_MVME16x | |
851 | is_not_mvme16x(L(gvtdone)) | |
852 | ||
853 | /* Need to get the BRD_ID info to differentiate between 162, 167, | |
854 | * etc. This is available as a BI_VME_BRDINFO tag with later | |
855 | * versions of VMELILO and TFTPLILO, otherwise we call the Bug. | |
856 | */ | |
857 | get_bi_record BI_VME_BRDINFO | |
858 | tstl %d0 | |
859 | jpl 1f | |
860 | ||
861 | /* Get pointer to board ID data from Bug */ | |
862 | movel %d2,%sp@- | |
863 | trap #15 | |
864 | .word 0x70 /* trap 0x70 - .BRD_ID */ | |
865 | movel %sp@+,%a0 | |
866 | 1: | |
867 | lea %pc@(mvme_bdid),%a1 | |
868 | /* Structure is 32 bytes long */ | |
869 | movel %a0@+,%a1@+ | |
870 | movel %a0@+,%a1@+ | |
871 | movel %a0@+,%a1@+ | |
872 | movel %a0@+,%a1@+ | |
873 | movel %a0@+,%a1@+ | |
874 | movel %a0@+,%a1@+ | |
875 | movel %a0@+,%a1@+ | |
876 | movel %a0@+,%a1@+ | |
877 | #endif | |
878 | ||
879 | L(gvtdone): | |
880 | ||
881 | #endif | |
882 | ||
883 | #ifdef CONFIG_HP300 | |
884 | is_not_hp300(L(nothp)) | |
885 | ||
886 | /* Get the address of the UART for serial debugging */ | |
887 | get_bi_record BI_HP300_UART_ADDR | |
888 | tstl %d0 | |
889 | jbmi 1f | |
890 | movel %a0@,%d3 | |
891 | lea %pc@(L(uartbase)),%a0 | |
892 | movel %d3,%a0@ | |
893 | get_bi_record BI_HP300_UART_SCODE | |
894 | tstl %d0 | |
895 | jbmi 1f | |
896 | movel %a0@,%d3 | |
897 | lea %pc@(L(uart_scode)),%a0 | |
898 | movel %d3,%a0@ | |
899 | 1: | |
900 | L(nothp): | |
901 | #endif | |
902 | ||
903 | /* | |
904 | * Initialize serial port | |
905 | */ | |
906 | jbsr L(serial_init) | |
907 | ||
908 | /* | |
909 | * Initialize console | |
910 | */ | |
911 | #ifdef CONFIG_MAC | |
912 | is_not_mac(L(nocon)) | |
913 | #ifdef CONSOLE | |
914 | console_init | |
915 | #ifdef CONSOLE_PENGUIN | |
916 | console_put_penguin | |
917 | #endif /* CONSOLE_PENGUIN */ | |
918 | console_put_stats | |
919 | #endif /* CONSOLE */ | |
920 | L(nocon): | |
921 | #endif /* CONFIG_MAC */ | |
922 | ||
923 | ||
924 | putc '\n' | |
925 | putc 'A' | |
926 | leds 0x2 | |
927 | dputn %pc@(L(cputype)) | |
928 | dputn %pc@(m68k_supervisor_cachemode) | |
929 | dputn %pc@(m68k_pgtable_cachemode) | |
930 | dputc '\n' | |
931 | ||
932 | /* | |
933 | * Save physical start address of kernel | |
934 | */ | |
935 | lea %pc@(L(phys_kernel_start)),%a0 | |
936 | lea %pc@(_stext),%a1 | |
937 | subl #_stext,%a1 | |
938 | addl #PAGE_OFFSET,%a1 | |
939 | movel %a1,%a0@ | |
940 | ||
941 | putc 'B' | |
942 | ||
943 | leds 0x4 | |
944 | ||
945 | /* | |
946 | * mmu_init | |
947 | * | |
948 | * This block of code does what's necessary to map in the various kinds | |
949 | * of machines for execution of Linux. | |
950 | * First map the first 4 MB of kernel code & data | |
951 | */ | |
952 | ||
953 | mmu_map #PAGE_OFFSET,%pc@(L(phys_kernel_start)),#4*1024*1024,\ | |
954 | %pc@(m68k_supervisor_cachemode) | |
955 | ||
956 | putc 'C' | |
957 | ||
958 | #ifdef CONFIG_AMIGA | |
959 | ||
960 | L(mmu_init_amiga): | |
961 | ||
962 | is_not_amiga(L(mmu_init_not_amiga)) | |
963 | /* | |
964 | * mmu_init_amiga | |
965 | */ | |
966 | ||
967 | putc 'D' | |
968 | ||
969 | is_not_040_or_060(1f) | |
970 | ||
971 | /* | |
972 | * 040: Map the 16Meg range physical 0x0 upto logical 0x8000.0000 | |
973 | */ | |
974 | mmu_map #0x80000000,#0,#0x01000000,#_PAGE_NOCACHE_S | |
975 | /* | |
976 | * Map the Zorro III I/O space with transparent translation | |
977 | * for frame buffer memory etc. | |
978 | */ | |
979 | mmu_map_tt #1,#0x40000000,#0x20000000,#_PAGE_NOCACHE_S | |
980 | ||
981 | jbra L(mmu_init_done) | |
982 | ||
983 | 1: | |
984 | /* | |
985 | * 030: Map the 32Meg range physical 0x0 upto logical 0x8000.0000 | |
986 | */ | |
987 | mmu_map #0x80000000,#0,#0x02000000,#_PAGE_NOCACHE030 | |
988 | mmu_map_tt #1,#0x40000000,#0x20000000,#_PAGE_NOCACHE030 | |
989 | ||
990 | jbra L(mmu_init_done) | |
991 | ||
992 | L(mmu_init_not_amiga): | |
993 | #endif | |
994 | ||
995 | #ifdef CONFIG_ATARI | |
996 | ||
997 | L(mmu_init_atari): | |
998 | ||
999 | is_not_atari(L(mmu_init_not_atari)) | |
1000 | ||
1001 | putc 'E' | |
1002 | ||
1003 | /* On the Atari, we map the I/O region (phys. 0x00ffxxxx) by mapping | |
1004 | the last 16 MB of virtual address space to the first 16 MB (i.e. | |
1005 | 0xffxxxxxx -> 0x00xxxxxx). For this, an additional pointer table is | |
1006 | needed. I/O ranges are marked non-cachable. | |
1007 | ||
1008 | For the Medusa it is better to map the I/O region transparently | |
1009 | (i.e. 0xffxxxxxx -> 0xffxxxxxx), because some I/O registers are | |
1010 | accessible only in the high area. | |
1011 | ||
1012 | On the Hades all I/O registers are only accessible in the high | |
1013 | area. | |
1014 | */ | |
1015 | ||
1016 | /* I/O base addr for non-Medusa, non-Hades: 0x00000000 */ | |
1017 | moveq #0,%d0 | |
1018 | movel %pc@(atari_mch_type),%d3 | |
1019 | cmpl #ATARI_MACH_MEDUSA,%d3 | |
1020 | jbeq 2f | |
1021 | cmpl #ATARI_MACH_HADES,%d3 | |
1022 | jbne 1f | |
1023 | 2: movel #0xff000000,%d0 /* Medusa/Hades base addr: 0xff000000 */ | |
1024 | 1: movel %d0,%d3 | |
1025 | ||
1026 | is_040_or_060(L(spata68040)) | |
1027 | ||
1028 | /* Map everything non-cacheable, though not all parts really | |
1029 | * need to disable caches (crucial only for 0xff8000..0xffffff | |
1030 | * (standard I/O) and 0xf00000..0xf3ffff (IDE)). The remainder | |
1031 | * isn't really used, except for sometimes peeking into the | |
1032 | * ROMs (mirror at phys. 0x0), so caching isn't necessary for | |
1033 | * this. */ | |
1034 | mmu_map #0xff000000,%d3,#0x01000000,#_PAGE_NOCACHE030 | |
1035 | ||
1036 | jbra L(mmu_init_done) | |
1037 | ||
1038 | L(spata68040): | |
1039 | ||
1040 | mmu_map #0xff000000,%d3,#0x01000000,#_PAGE_NOCACHE_S | |
1041 | ||
1042 | jbra L(mmu_init_done) | |
1043 | ||
1044 | L(mmu_init_not_atari): | |
1045 | #endif | |
1046 | ||
1047 | #ifdef CONFIG_Q40 | |
1048 | is_not_q40(L(notq40)) | |
1049 | /* | |
1050 | * add transparent mapping for 0xff00 0000 - 0xffff ffff | |
1051 | * non-cached serialized etc.. | |
1052 | * this includes master chip, DAC, RTC and ISA ports | |
1053 | * 0xfe000000-0xfeffffff is for screen and ROM | |
1054 | */ | |
1055 | ||
1056 | putc 'Q' | |
1057 | ||
1058 | mmu_map_tt #0,#0xfe000000,#0x01000000,#_PAGE_CACHE040W | |
1059 | mmu_map_tt #1,#0xff000000,#0x01000000,#_PAGE_NOCACHE_S | |
1060 | ||
1061 | jbra L(mmu_init_done) | |
1062 | ||
1063 | L(notq40): | |
1064 | #endif | |
1065 | ||
1066 | #ifdef CONFIG_HP300 | |
1067 | is_not_hp300(L(nothp300)) | |
1068 | ||
1069 | /* On the HP300, we map the ROM, INTIO and DIO regions (phys. 0x00xxxxxx) | |
1070 | * by mapping 32MB (on 020/030) or 16 MB (on 040) from 0xf0xxxxxx -> 0x00xxxxxx). | |
1071 | * The ROM mapping is needed because the LEDs are mapped there too. | |
1072 | */ | |
1073 | ||
1074 | is_040(1f) | |
1075 | ||
1076 | /* | |
1077 | * 030: Map the 32Meg range physical 0x0 upto logical 0xf000.0000 | |
1078 | */ | |
1079 | mmu_map #0xf0000000,#0,#0x02000000,#_PAGE_NOCACHE030 | |
1080 | ||
1081 | jbra L(mmu_init_done) | |
1082 | ||
1083 | 1: | |
1084 | /* | |
1085 | * 040: Map the 16Meg range physical 0x0 upto logical 0xf000.0000 | |
1086 | */ | |
1087 | mmu_map #0xf0000000,#0,#0x01000000,#_PAGE_NOCACHE_S | |
1088 | ||
1089 | jbra L(mmu_init_done) | |
1090 | ||
1091 | L(nothp300): | |
1092 | #endif /* CONFIG_HP300 */ | |
1093 | ||
1094 | #ifdef CONFIG_MVME147 | |
1095 | ||
1096 | is_not_mvme147(L(not147)) | |
1097 | ||
1098 | /* | |
1099 | * On MVME147 we have already created kernel page tables for | |
1100 | * 4MB of RAM at address 0, so now need to do a transparent | |
1101 | * mapping of the top of memory space. Make it 0.5GByte for now, | |
1102 | * so we can access on-board i/o areas. | |
1103 | */ | |
1104 | ||
1105 | mmu_map_tt #1,#0xe0000000,#0x20000000,#_PAGE_NOCACHE030 | |
1106 | ||
1107 | jbra L(mmu_init_done) | |
1108 | ||
1109 | L(not147): | |
1110 | #endif /* CONFIG_MVME147 */ | |
1111 | ||
1112 | #ifdef CONFIG_MVME16x | |
1113 | ||
1114 | is_not_mvme16x(L(not16x)) | |
1115 | ||
1116 | /* | |
1117 | * On MVME16x we have already created kernel page tables for | |
1118 | * 4MB of RAM at address 0, so now need to do a transparent | |
1119 | * mapping of the top of memory space. Make it 0.5GByte for now. | |
1120 | * Supervisor only access, so transparent mapping doesn't | |
1121 | * clash with User code virtual address space. | |
1122 | * this covers IO devices, PROM and SRAM. The PROM and SRAM | |
1123 | * mapping is needed to allow 167Bug to run. | |
1124 | * IO is in the range 0xfff00000 to 0xfffeffff. | |
1125 | * PROM is 0xff800000->0xffbfffff and SRAM is | |
1126 | * 0xffe00000->0xffe1ffff. | |
1127 | */ | |
1128 | ||
1129 | mmu_map_tt #1,#0xe0000000,#0x20000000,#_PAGE_NOCACHE_S | |
1130 | ||
1131 | jbra L(mmu_init_done) | |
1132 | ||
1133 | L(not16x): | |
1134 | #endif /* CONFIG_MVME162 | CONFIG_MVME167 */ | |
1135 | ||
1136 | #ifdef CONFIG_BVME6000 | |
1137 | ||
1138 | is_not_bvme6000(L(not6000)) | |
1139 | ||
1140 | /* | |
1141 | * On BVME6000 we have already created kernel page tables for | |
1142 | * 4MB of RAM at address 0, so now need to do a transparent | |
1143 | * mapping of the top of memory space. Make it 0.5GByte for now, | |
1144 | * so we can access on-board i/o areas. | |
1145 | * Supervisor only access, so transparent mapping doesn't | |
1146 | * clash with User code virtual address space. | |
1147 | */ | |
1148 | ||
1149 | mmu_map_tt #1,#0xe0000000,#0x20000000,#_PAGE_NOCACHE_S | |
1150 | ||
1151 | jbra L(mmu_init_done) | |
1152 | ||
1153 | L(not6000): | |
1154 | #endif /* CONFIG_BVME6000 */ | |
1155 | ||
1156 | /* | |
1157 | * mmu_init_mac | |
1158 | * | |
1159 | * The Macintosh mappings are less clear. | |
1160 | * | |
1161 | * Even as of this writing, it is unclear how the | |
1162 | * Macintosh mappings will be done. However, as | |
1163 | * the first author of this code I'm proposing the | |
1164 | * following model: | |
1165 | * | |
1166 | * Map the kernel (that's already done), | |
1167 | * Map the I/O (on most machines that's the | |
1168 | * 0x5000.0000 ... 0x5300.0000 range, | |
1169 | * Map the video frame buffer using as few pages | |
1170 | * as absolutely (this requirement mostly stems from | |
1171 | * the fact that when the frame buffer is at | |
1172 | * 0x0000.0000 then we know there is valid RAM just | |
1173 | * above the screen that we don't want to waste!). | |
1174 | * | |
1175 | * By the way, if the frame buffer is at 0x0000.0000 | |
1176 | * then the Macintosh is known as an RBV based Mac. | |
1177 | * | |
1178 | * By the way 2, the code currently maps in a bunch of | |
1179 | * regions. But I'd like to cut that out. (And move most | |
1180 | * of the mappings up into the kernel proper ... or only | |
1181 | * map what's necessary.) | |
1182 | */ | |
1183 | ||
1184 | #ifdef CONFIG_MAC | |
1185 | ||
1186 | L(mmu_init_mac): | |
1187 | ||
1188 | is_not_mac(L(mmu_init_not_mac)) | |
1189 | ||
1190 | putc 'F' | |
1191 | ||
1192 | is_not_040_or_060(1f) | |
1193 | ||
1194 | moveq #_PAGE_NOCACHE_S,%d3 | |
1195 | jbra 2f | |
1196 | 1: | |
1197 | moveq #_PAGE_NOCACHE030,%d3 | |
1198 | 2: | |
1199 | /* | |
1200 | * Mac Note: screen address of logical 0xF000.0000 -> <screen physical> | |
1201 | * we simply map the 4MB that contains the videomem | |
1202 | */ | |
1203 | ||
1204 | movel #VIDEOMEMMASK,%d0 | |
1205 | andl %pc@(L(mac_videobase)),%d0 | |
1206 | ||
1207 | mmu_map #VIDEOMEMBASE,%d0,#VIDEOMEMSIZE,%d3 | |
1208 | /* ROM from 4000 0000 to 4200 0000 (only for mac_reset()) */ | |
1209 | mmu_map_eq #0x40000000,#0x02000000,%d3 | |
1210 | /* IO devices (incl. serial port) from 5000 0000 to 5300 0000 */ | |
1211 | mmu_map_eq #0x50000000,#0x03000000,%d3 | |
1212 | /* Nubus slot space (video at 0xF0000000, rom at 0xF0F80000) */ | |
1213 | mmu_map_tt #1,#0xf8000000,#0x08000000,%d3 | |
1214 | ||
1215 | jbra L(mmu_init_done) | |
1216 | ||
1217 | L(mmu_init_not_mac): | |
1218 | #endif | |
1219 | ||
1220 | #ifdef CONFIG_SUN3X | |
1221 | is_not_sun3x(L(notsun3x)) | |
1222 | ||
1223 | /* oh, the pain.. We're gonna want the prom code after | |
1224 | * starting the MMU, so we copy the mappings, translating | |
1225 | * from 8k -> 4k pages as we go. | |
1226 | */ | |
1227 | ||
1228 | /* copy maps from 0xfee00000 to 0xff000000 */ | |
1229 | movel #0xfee00000, %d0 | |
1230 | moveq #ROOT_INDEX_SHIFT, %d1 | |
1231 | lsrl %d1,%d0 | |
1232 | mmu_get_root_table_entry %d0 | |
1233 | ||
1234 | movel #0xfee00000, %d0 | |
1235 | moveq #PTR_INDEX_SHIFT, %d1 | |
1236 | lsrl %d1,%d0 | |
1237 | andl #PTR_TABLE_SIZE-1, %d0 | |
1238 | mmu_get_ptr_table_entry %a0,%d0 | |
1239 | ||
1240 | movel #0xfee00000, %d0 | |
1241 | moveq #PAGE_INDEX_SHIFT, %d1 | |
1242 | lsrl %d1,%d0 | |
1243 | andl #PAGE_TABLE_SIZE-1, %d0 | |
1244 | mmu_get_page_table_entry %a0,%d0 | |
1245 | ||
1246 | /* this is where the prom page table lives */ | |
1247 | movel 0xfefe00d4, %a1 | |
1248 | movel %a1@, %a1 | |
1249 | ||
1250 | movel #((0x200000 >> 13)-1), %d1 | |
1251 | ||
1252 | 1: | |
1253 | movel %a1@+, %d3 | |
1254 | movel %d3,%a0@+ | |
1255 | addl #0x1000,%d3 | |
1256 | movel %d3,%a0@+ | |
1257 | ||
1258 | dbra %d1,1b | |
1259 | ||
1260 | /* setup tt1 for I/O */ | |
1261 | mmu_map_tt #1,#0x40000000,#0x40000000,#_PAGE_NOCACHE_S | |
1262 | jbra L(mmu_init_done) | |
1263 | ||
1264 | L(notsun3x): | |
1265 | #endif | |
1266 | ||
1267 | #ifdef CONFIG_APOLLO | |
1268 | is_not_apollo(L(notapollo)) | |
1269 | ||
1270 | putc 'P' | |
1271 | mmu_map #0x80000000,#0,#0x02000000,#_PAGE_NOCACHE030 | |
1272 | ||
1273 | L(notapollo): | |
1274 | jbra L(mmu_init_done) | |
1275 | #endif | |
1276 | ||
1277 | L(mmu_init_done): | |
1278 | ||
1279 | putc 'G' | |
1280 | leds 0x8 | |
1281 | ||
1282 | /* | |
1283 | * mmu_fixup | |
1284 | * | |
1285 | * On the 040 class machines, all pages that are used for the | |
1286 | * mmu have to be fixed up. According to Motorola, pages holding mmu | |
1287 | * tables should be non-cacheable on a '040 and write-through on a | |
1288 | * '060. But analysis of the reasons for this, and practical | |
1289 | * experience, showed that write-through also works on a '040. | |
1290 | * | |
1291 | * Allocated memory so far goes from kernel_end to memory_start that | |
1292 | * is used for all kind of tables, for that the cache attributes | |
1293 | * are now fixed. | |
1294 | */ | |
1295 | L(mmu_fixup): | |
1296 | ||
1297 | is_not_040_or_060(L(mmu_fixup_done)) | |
1298 | ||
1299 | #ifdef MMU_NOCACHE_KERNEL | |
1300 | jbra L(mmu_fixup_done) | |
1301 | #endif | |
1302 | ||
1303 | /* first fix the page at the start of the kernel, that | |
1304 | * contains also kernel_pg_dir. | |
1305 | */ | |
1306 | movel %pc@(L(phys_kernel_start)),%d0 | |
1307 | subl #PAGE_OFFSET,%d0 | |
1308 | lea %pc@(_stext),%a0 | |
1309 | subl %d0,%a0 | |
1310 | mmu_fixup_page_mmu_cache %a0 | |
1311 | ||
1312 | movel %pc@(L(kernel_end)),%a0 | |
1313 | subl %d0,%a0 | |
1314 | movel %pc@(L(memory_start)),%a1 | |
1315 | subl %d0,%a1 | |
1316 | bra 2f | |
1317 | 1: | |
1318 | mmu_fixup_page_mmu_cache %a0 | |
1319 | addw #PAGESIZE,%a0 | |
1320 | 2: | |
1321 | cmpl %a0,%a1 | |
1322 | jgt 1b | |
1323 | ||
1324 | L(mmu_fixup_done): | |
1325 | ||
1326 | #ifdef MMU_PRINT | |
1327 | mmu_print | |
1328 | #endif | |
1329 | ||
1330 | /* | |
1331 | * mmu_engage | |
1332 | * | |
1333 | * This chunk of code performs the gruesome task of engaging the MMU. | |
1334 | * The reason its gruesome is because when the MMU becomes engaged it | |
1335 | * maps logical addresses to physical addresses. The Program Counter | |
1336 | * register is then passed through the MMU before the next instruction | |
1337 | * is fetched (the instruction following the engage MMU instruction). | |
1338 | * This may mean one of two things: | |
1339 | * 1. The Program Counter falls within the logical address space of | |
1340 | * the kernel of which there are two sub-possibilities: | |
1341 | * A. The PC maps to the correct instruction (logical PC == physical | |
1342 | * code location), or | |
1343 | * B. The PC does not map through and the processor will read some | |
1344 | * data (or instruction) which is not the logically next instr. | |
1345 | * As you can imagine, A is good and B is bad. | |
1346 | * Alternatively, | |
1347 | * 2. The Program Counter does not map through the MMU. The processor | |
1348 | * will take a Bus Error. | |
1349 | * Clearly, 2 is bad. | |
1350 | * It doesn't take a wiz kid to figure you want 1.A. | |
1351 | * This code creates that possibility. | |
1352 | * There are two possible 1.A. states (we now ignore the other above states): | |
1353 | * A. The kernel is located at physical memory addressed the same as | |
1354 | * the logical memory for the kernel, i.e., 0x01000. | |
1355 | * B. The kernel is located some where else. e.g., 0x0400.0000 | |
1356 | * | |
1357 | * Under some conditions the Macintosh can look like A or B. | |
1358 | * [A friend and I once noted that Apple hardware engineers should be | |
1359 | * wacked twice each day: once when they show up at work (as in, Whack!, | |
1360 | * "This is for the screwy hardware we know you're going to design today."), | |
1361 | * and also at the end of the day (as in, Whack! "I don't know what | |
1362 | * you designed today, but I'm sure it wasn't good."). -- rst] | |
1363 | * | |
1364 | * This code works on the following premise: | |
1365 | * If the kernel start (%d5) is within the first 16 Meg of RAM, | |
1366 | * then create a mapping for the kernel at logical 0x8000.0000 to | |
1367 | * the physical location of the pc. And, create a transparent | |
1368 | * translation register for the first 16 Meg. Then, after the MMU | |
1369 | * is engaged, the PC can be moved up into the 0x8000.0000 range | |
1370 | * and then the transparent translation can be turned off and then | |
1371 | * the PC can jump to the correct logical location and it will be | |
1372 | * home (finally). This is essentially the code that the Amiga used | |
1373 | * to use. Now, it's generalized for all processors. Which means | |
1374 | * that a fresh (but temporary) mapping has to be created. The mapping | |
1375 | * is made in page 0 (an as of yet unused location -- except for the | |
1376 | * stack!). This temporary mapping will only require 1 pointer table | |
1377 | * and a single page table (it can map 256K). | |
1378 | * | |
1379 | * OK, alternatively, imagine that the Program Counter is not within | |
1380 | * the first 16 Meg. Then, just use Transparent Translation registers | |
1381 | * to do the right thing. | |
1382 | * | |
1383 | * Last, if _start is already at 0x01000, then there's nothing special | |
1384 | * to do (in other words, in a degenerate case of the first case above, | |
1385 | * do nothing). | |
1386 | * | |
1387 | * Let's do it. | |
1388 | * | |
1389 | * | |
1390 | */ | |
1391 | ||
1392 | putc 'H' | |
1393 | ||
1394 | mmu_engage | |
1395 | ||
1396 | /* | |
1397 | * After this point no new memory is allocated and | |
1398 | * the start of available memory is stored in availmem. | |
1399 | * (The bootmem allocator requires now the physicall address.) | |
1400 | */ | |
1401 | ||
1402 | movel L(memory_start),availmem | |
1403 | ||
1404 | #ifdef CONFIG_AMIGA | |
1405 | is_not_amiga(1f) | |
1406 | /* fixup the Amiga custom register location before printing */ | |
1407 | clrl L(custom) | |
1408 | 1: | |
1409 | #endif | |
1410 | ||
1411 | #ifdef CONFIG_ATARI | |
1412 | is_not_atari(1f) | |
1413 | /* fixup the Atari iobase register location before printing */ | |
1414 | movel #0xff000000,L(iobase) | |
1415 | 1: | |
1416 | #endif | |
1417 | ||
1418 | #ifdef CONFIG_MAC | |
1419 | is_not_mac(1f) | |
1420 | movel #~VIDEOMEMMASK,%d0 | |
1421 | andl L(mac_videobase),%d0 | |
1422 | addl #VIDEOMEMBASE,%d0 | |
1423 | movel %d0,L(mac_videobase) | |
1424 | #if defined(CONSOLE) | |
1425 | movel %pc@(L(phys_kernel_start)),%d0 | |
1426 | subl #PAGE_OFFSET,%d0 | |
1427 | subl %d0,L(console_font) | |
1428 | subl %d0,L(console_font_data) | |
1429 | #endif | |
1430 | #ifdef MAC_SERIAL_DEBUG | |
1431 | orl #0x50000000,L(mac_sccbase) | |
1432 | #endif | |
1433 | 1: | |
1434 | #endif | |
1435 | ||
1436 | #ifdef CONFIG_HP300 | |
1437 | is_not_hp300(1f) | |
1438 | /* | |
1439 | * Fix up the iobase register to point to the new location of the LEDs. | |
1440 | */ | |
1441 | movel #0xf0000000,L(iobase) | |
1442 | ||
1443 | /* | |
1444 | * Energise the FPU and caches. | |
1445 | */ | |
1446 | is_040(1f) | |
1447 | movel #0x60,0xf05f400c | |
1448 | jbra 2f | |
1449 | ||
1450 | /* | |
1451 | * 040: slightly different, apparently. | |
1452 | */ | |
1453 | 1: movew #0,0xf05f400e | |
1454 | movew #0x64,0xf05f400e | |
1455 | 2: | |
1456 | #endif | |
1457 | ||
1458 | #ifdef CONFIG_SUN3X | |
1459 | is_not_sun3x(1f) | |
1460 | ||
1461 | /* enable copro */ | |
1462 | oriw #0x4000,0x61000000 | |
1463 | 1: | |
1464 | #endif | |
1465 | ||
1466 | #ifdef CONFIG_APOLLO | |
1467 | is_not_apollo(1f) | |
1468 | ||
1469 | /* | |
1470 | * Fix up the iobase before printing | |
1471 | */ | |
1472 | movel #0x80000000,L(iobase) | |
1473 | 1: | |
1474 | #endif | |
1475 | ||
1476 | putc 'I' | |
1477 | leds 0x10 | |
1478 | ||
1479 | /* | |
1480 | * Enable caches | |
1481 | */ | |
1482 | ||
1483 | is_not_040_or_060(L(cache_not_680460)) | |
1484 | ||
1485 | L(cache680460): | |
1486 | .chip 68040 | |
1487 | nop | |
1488 | cpusha %bc | |
1489 | nop | |
1490 | ||
1491 | is_060(L(cache68060)) | |
1492 | ||
1493 | movel #CC6_ENABLE_D+CC6_ENABLE_I,%d0 | |
1494 | /* MMU stuff works in copyback mode now, so enable the cache */ | |
1495 | movec %d0,%cacr | |
1496 | jra L(cache_done) | |
1497 | ||
1498 | L(cache68060): | |
1499 | movel #CC6_ENABLE_D+CC6_ENABLE_I+CC6_ENABLE_SB+CC6_PUSH_DPI+CC6_ENABLE_B+CC6_CLRA_B,%d0 | |
1500 | /* MMU stuff works in copyback mode now, so enable the cache */ | |
1501 | movec %d0,%cacr | |
1502 | /* enable superscalar dispatch in PCR */ | |
1503 | moveq #1,%d0 | |
1504 | .chip 68060 | |
1505 | movec %d0,%pcr | |
1506 | ||
1507 | jbra L(cache_done) | |
1508 | L(cache_not_680460): | |
1509 | L(cache68030): | |
1510 | .chip 68030 | |
1511 | movel #CC3_ENABLE_DB+CC3_CLR_D+CC3_ENABLE_D+CC3_ENABLE_IB+CC3_CLR_I+CC3_ENABLE_I,%d0 | |
1512 | movec %d0,%cacr | |
1513 | ||
1514 | jra L(cache_done) | |
1515 | .chip 68k | |
1516 | L(cache_done): | |
1517 | ||
1518 | putc 'J' | |
1519 | ||
1520 | /* | |
1521 | * Setup initial stack pointer | |
1522 | */ | |
1523 | lea init_task,%curptr | |
1524 | lea init_thread_union+THREAD_SIZE,%sp | |
1525 | ||
1526 | putc 'K' | |
1527 | ||
1528 | subl %a6,%a6 /* clear a6 for gdb */ | |
1529 | ||
1530 | /* | |
1531 | * The new 64bit printf support requires an early exception initialization. | |
1532 | */ | |
1533 | jbsr base_trap_init | |
1534 | ||
1535 | /* jump to the kernel start */ | |
1536 | ||
1537 | putc '\n' | |
1538 | leds 0x55 | |
1539 | ||
1540 | jbsr start_kernel | |
1541 | ||
1542 | /* | |
1543 | * Find a tag record in the bootinfo structure | |
1544 | * The bootinfo structure is located right after the kernel bss | |
1545 | * Returns: d0: size (-1 if not found) | |
1546 | * a0: data pointer (end-of-records if not found) | |
1547 | */ | |
1548 | func_start get_bi_record,%d1 | |
1549 | ||
1550 | movel ARG1,%d0 | |
1551 | lea %pc@(_end),%a0 | |
1552 | 1: tstw %a0@(BIR_TAG) | |
1553 | jeq 3f | |
1554 | cmpw %a0@(BIR_TAG),%d0 | |
1555 | jeq 2f | |
1556 | addw %a0@(BIR_SIZE),%a0 | |
1557 | jra 1b | |
1558 | 2: moveq #0,%d0 | |
1559 | movew %a0@(BIR_SIZE),%d0 | |
1560 | lea %a0@(BIR_DATA),%a0 | |
1561 | jra 4f | |
1562 | 3: moveq #-1,%d0 | |
1563 | lea %a0@(BIR_SIZE),%a0 | |
1564 | 4: | |
1565 | func_return get_bi_record | |
1566 | ||
1567 | ||
1568 | /* | |
1569 | * MMU Initialization Begins Here | |
1570 | * | |
1571 | * The structure of the MMU tables on the 68k machines | |
1572 | * is thus: | |
1573 | * Root Table | |
1574 | * Logical addresses are translated through | |
1575 | * a hierarchical translation mechanism where the high-order | |
1576 | * seven bits of the logical address (LA) are used as an | |
1577 | * index into the "root table." Each entry in the root | |
1578 | * table has a bit which specifies if it's a valid pointer to a | |
1579 | * pointer table. Each entry defines a 32KMeg range of memory. | |
1580 | * If an entry is invalid then that logical range of 32M is | |
1581 | * invalid and references to that range of memory (when the MMU | |
1582 | * is enabled) will fault. If the entry is valid, then it does | |
1583 | * one of two things. On 040/060 class machines, it points to | |
1584 | * a pointer table which then describes more finely the memory | |
1585 | * within that 32M range. On 020/030 class machines, a technique | |
1586 | * called "early terminating descriptors" are used. This technique | |
1587 | * allows an entire 32Meg to be described by a single entry in the | |
1588 | * root table. Thus, this entry in the root table, contains the | |
1589 | * physical address of the memory or I/O at the logical address | |
1590 | * which the entry represents and it also contains the necessary | |
1591 | * cache bits for this region. | |
1592 | * | |
1593 | * Pointer Tables | |
1594 | * Per the Root Table, there will be one or more | |
1595 | * pointer tables. Each pointer table defines a 32M range. | |
1596 | * Not all of the 32M range need be defined. Again, the next | |
1597 | * seven bits of the logical address are used an index into | |
1598 | * the pointer table to point to page tables (if the pointer | |
1599 | * is valid). There will undoubtedly be more than one | |
1600 | * pointer table for the kernel because each pointer table | |
1601 | * defines a range of only 32M. Valid pointer table entries | |
1602 | * point to page tables, or are early terminating entries | |
1603 | * themselves. | |
1604 | * | |
1605 | * Page Tables | |
1606 | * Per the Pointer Tables, each page table entry points | |
1607 | * to the physical page in memory that supports the logical | |
1608 | * address that translates to the particular index. | |
1609 | * | |
1610 | * In short, the Logical Address gets translated as follows: | |
1611 | * bits 31..26 - index into the Root Table | |
1612 | * bits 25..18 - index into the Pointer Table | |
1613 | * bits 17..12 - index into the Page Table | |
1614 | * bits 11..0 - offset into a particular 4K page | |
1615 | * | |
1616 | * The algorithms which follows do one thing: they abstract | |
1617 | * the MMU hardware. For example, there are three kinds of | |
1618 | * cache settings that are relevant. Either, memory is | |
1619 | * being mapped in which case it is either Kernel Code (or | |
1620 | * the RamDisk) or it is MMU data. On the 030, the MMU data | |
1621 | * option also describes the kernel. Or, I/O is being mapped | |
1622 | * in which case it has its own kind of cache bits. There | |
1623 | * are constants which abstract these notions from the code that | |
1624 | * actually makes the call to map some range of memory. | |
1625 | * | |
1626 | * | |
1627 | * | |
1628 | */ | |
1629 | ||
1630 | #ifdef MMU_PRINT | |
1631 | /* | |
1632 | * mmu_print | |
1633 | * | |
1634 | * This algorithm will print out the current MMU mappings. | |
1635 | * | |
1636 | * Input: | |
1637 | * %a5 points to the root table. Everything else is calculated | |
1638 | * from this. | |
1639 | */ | |
1640 | ||
1641 | #define mmu_next_valid 0 | |
1642 | #define mmu_start_logical 4 | |
1643 | #define mmu_next_logical 8 | |
1644 | #define mmu_start_physical 12 | |
1645 | #define mmu_next_physical 16 | |
1646 | ||
1647 | #define MMU_PRINT_INVALID -1 | |
1648 | #define MMU_PRINT_VALID 1 | |
1649 | #define MMU_PRINT_UNINITED 0 | |
1650 | ||
1651 | #define putZc(z,n) jbne 1f; putc z; jbra 2f; 1: putc n; 2: | |
1652 | ||
1653 | func_start mmu_print,%a0-%a6/%d0-%d7 | |
1654 | ||
1655 | movel %pc@(L(kernel_pgdir_ptr)),%a5 | |
1656 | lea %pc@(L(mmu_print_data)),%a0 | |
1657 | movel #MMU_PRINT_UNINITED,%a0@(mmu_next_valid) | |
1658 | ||
1659 | is_not_040_or_060(mmu_030_print) | |
1660 | ||
1661 | mmu_040_print: | |
1662 | puts "\nMMU040\n" | |
1663 | puts "rp:" | |
1664 | putn %a5 | |
1665 | putc '\n' | |
1666 | #if 0 | |
1667 | /* | |
1668 | * The following #if/#endif block is a tight algorithm for dumping the 040 | |
1669 | * MMU Map in gory detail. It really isn't that practical unless the | |
1670 | * MMU Map algorithm appears to go awry and you need to debug it at the | |
1671 | * entry per entry level. | |
1672 | */ | |
1673 | movel #ROOT_TABLE_SIZE,%d5 | |
1674 | #if 0 | |
1675 | movel %a5@+,%d7 | Burn an entry to skip the kernel mappings, | |
1676 | subql #1,%d5 | they (might) work | |
1677 | #endif | |
1678 | 1: tstl %d5 | |
1679 | jbeq mmu_print_done | |
1680 | subq #1,%d5 | |
1681 | movel %a5@+,%d7 | |
1682 | btst #1,%d7 | |
1683 | jbeq 1b | |
1684 | ||
1685 | 2: putn %d7 | |
1686 | andil #0xFFFFFE00,%d7 | |
1687 | movel %d7,%a4 | |
1688 | movel #PTR_TABLE_SIZE,%d4 | |
1689 | putc ' ' | |
1690 | 3: tstl %d4 | |
1691 | jbeq 11f | |
1692 | subq #1,%d4 | |
1693 | movel %a4@+,%d7 | |
1694 | btst #1,%d7 | |
1695 | jbeq 3b | |
1696 | ||
1697 | 4: putn %d7 | |
1698 | andil #0xFFFFFF00,%d7 | |
1699 | movel %d7,%a3 | |
1700 | movel #PAGE_TABLE_SIZE,%d3 | |
1701 | 5: movel #8,%d2 | |
1702 | 6: tstl %d3 | |
1703 | jbeq 31f | |
1704 | subq #1,%d3 | |
1705 | movel %a3@+,%d6 | |
1706 | btst #0,%d6 | |
1707 | jbeq 6b | |
1708 | 7: tstl %d2 | |
1709 | jbeq 8f | |
1710 | subq #1,%d2 | |
1711 | putc ' ' | |
1712 | jbra 91f | |
1713 | 8: putc '\n' | |
1714 | movel #8+1+8+1+1,%d2 | |
1715 | 9: putc ' ' | |
1716 | dbra %d2,9b | |
1717 | movel #7,%d2 | |
1718 | 91: putn %d6 | |
1719 | jbra 6b | |
1720 | ||
1721 | 31: putc '\n' | |
1722 | movel #8+1,%d2 | |
1723 | 32: putc ' ' | |
1724 | dbra %d2,32b | |
1725 | jbra 3b | |
1726 | ||
1727 | 11: putc '\n' | |
1728 | jbra 1b | |
1729 | #endif /* MMU 040 Dumping code that's gory and detailed */ | |
1730 | ||
1731 | lea %pc@(kernel_pg_dir),%a5 | |
1732 | movel %a5,%a0 /* a0 has the address of the root table ptr */ | |
1733 | movel #0x00000000,%a4 /* logical address */ | |
1734 | moveql #0,%d0 | |
1735 | 40: | |
1736 | /* Increment the logical address and preserve in d5 */ | |
1737 | movel %a4,%d5 | |
1738 | addil #PAGESIZE<<13,%d5 | |
1739 | movel %a0@+,%d6 | |
1740 | btst #1,%d6 | |
1741 | jbne 41f | |
1742 | jbsr mmu_print_tuple_invalidate | |
1743 | jbra 48f | |
1744 | 41: | |
1745 | movel #0,%d1 | |
1746 | andil #0xfffffe00,%d6 | |
1747 | movel %d6,%a1 | |
1748 | 42: | |
1749 | movel %a4,%d5 | |
1750 | addil #PAGESIZE<<6,%d5 | |
1751 | movel %a1@+,%d6 | |
1752 | btst #1,%d6 | |
1753 | jbne 43f | |
1754 | jbsr mmu_print_tuple_invalidate | |
1755 | jbra 47f | |
1756 | 43: | |
1757 | movel #0,%d2 | |
1758 | andil #0xffffff00,%d6 | |
1759 | movel %d6,%a2 | |
1760 | 44: | |
1761 | movel %a4,%d5 | |
1762 | addil #PAGESIZE,%d5 | |
1763 | movel %a2@+,%d6 | |
1764 | btst #0,%d6 | |
1765 | jbne 45f | |
1766 | jbsr mmu_print_tuple_invalidate | |
1767 | jbra 46f | |
1768 | 45: | |
1769 | moveml %d0-%d1,%sp@- | |
1770 | movel %a4,%d0 | |
1771 | movel %d6,%d1 | |
1772 | andil #0xfffff4e0,%d1 | |
1773 | lea %pc@(mmu_040_print_flags),%a6 | |
1774 | jbsr mmu_print_tuple | |
1775 | moveml %sp@+,%d0-%d1 | |
1776 | 46: | |
1777 | movel %d5,%a4 | |
1778 | addq #1,%d2 | |
1779 | cmpib #64,%d2 | |
1780 | jbne 44b | |
1781 | 47: | |
1782 | movel %d5,%a4 | |
1783 | addq #1,%d1 | |
1784 | cmpib #128,%d1 | |
1785 | jbne 42b | |
1786 | 48: | |
1787 | movel %d5,%a4 /* move to the next logical address */ | |
1788 | addq #1,%d0 | |
1789 | cmpib #128,%d0 | |
1790 | jbne 40b | |
1791 | ||
1792 | .chip 68040 | |
1793 | movec %dtt1,%d0 | |
1794 | movel %d0,%d1 | |
1795 | andiw #0x8000,%d1 /* is it valid ? */ | |
1796 | jbeq 1f /* No, bail out */ | |
1797 | ||
1798 | movel %d0,%d1 | |
1799 | andil #0xff000000,%d1 /* Get the address */ | |
1800 | putn %d1 | |
1801 | puts "==" | |
1802 | putn %d1 | |
1803 | ||
1804 | movel %d0,%d6 | |
1805 | jbsr mmu_040_print_flags_tt | |
1806 | 1: | |
1807 | movec %dtt0,%d0 | |
1808 | movel %d0,%d1 | |
1809 | andiw #0x8000,%d1 /* is it valid ? */ | |
1810 | jbeq 1f /* No, bail out */ | |
1811 | ||
1812 | movel %d0,%d1 | |
1813 | andil #0xff000000,%d1 /* Get the address */ | |
1814 | putn %d1 | |
1815 | puts "==" | |
1816 | putn %d1 | |
1817 | ||
1818 | movel %d0,%d6 | |
1819 | jbsr mmu_040_print_flags_tt | |
1820 | 1: | |
1821 | .chip 68k | |
1822 | ||
1823 | jbra mmu_print_done | |
1824 | ||
1825 | mmu_040_print_flags: | |
1826 | btstl #10,%d6 | |
1827 | putZc(' ','G') /* global bit */ | |
1828 | btstl #7,%d6 | |
1829 | putZc(' ','S') /* supervisor bit */ | |
1830 | mmu_040_print_flags_tt: | |
1831 | btstl #6,%d6 | |
1832 | jbne 3f | |
1833 | putc 'C' | |
1834 | btstl #5,%d6 | |
1835 | putZc('w','c') /* write through or copy-back */ | |
1836 | jbra 4f | |
1837 | 3: | |
1838 | putc 'N' | |
1839 | btstl #5,%d6 | |
1840 | putZc('s',' ') /* serialized non-cacheable, or non-cacheable */ | |
1841 | 4: | |
1842 | rts | |
1843 | ||
1844 | mmu_030_print_flags: | |
1845 | btstl #6,%d6 | |
1846 | putZc('C','I') /* write through or copy-back */ | |
1847 | rts | |
1848 | ||
1849 | mmu_030_print: | |
1850 | puts "\nMMU030\n" | |
1851 | puts "\nrp:" | |
1852 | putn %a5 | |
1853 | putc '\n' | |
1854 | movel %a5,%d0 | |
1855 | andil #0xfffffff0,%d0 | |
1856 | movel %d0,%a0 | |
1857 | movel #0x00000000,%a4 /* logical address */ | |
1858 | movel #0,%d0 | |
1859 | 30: | |
1860 | movel %a4,%d5 | |
1861 | addil #PAGESIZE<<13,%d5 | |
1862 | movel %a0@+,%d6 | |
1863 | btst #1,%d6 /* is it a table ptr? */ | |
1864 | jbne 31f /* yes */ | |
1865 | btst #0,%d6 /* is it early terminating? */ | |
1866 | jbeq 1f /* no */ | |
1867 | jbsr mmu_030_print_helper | |
1868 | jbra 38f | |
1869 | 1: | |
1870 | jbsr mmu_print_tuple_invalidate | |
1871 | jbra 38f | |
1872 | 31: | |
1873 | movel #0,%d1 | |
1874 | andil #0xfffffff0,%d6 | |
1875 | movel %d6,%a1 | |
1876 | 32: | |
1877 | movel %a4,%d5 | |
1878 | addil #PAGESIZE<<6,%d5 | |
1879 | movel %a1@+,%d6 | |
1880 | btst #1,%d6 /* is it a table ptr? */ | |
1881 | jbne 33f /* yes */ | |
1882 | btst #0,%d6 /* is it a page descriptor? */ | |
1883 | jbeq 1f /* no */ | |
1884 | jbsr mmu_030_print_helper | |
1885 | jbra 37f | |
1886 | 1: | |
1887 | jbsr mmu_print_tuple_invalidate | |
1888 | jbra 37f | |
1889 | 33: | |
1890 | movel #0,%d2 | |
1891 | andil #0xfffffff0,%d6 | |
1892 | movel %d6,%a2 | |
1893 | 34: | |
1894 | movel %a4,%d5 | |
1895 | addil #PAGESIZE,%d5 | |
1896 | movel %a2@+,%d6 | |
1897 | btst #0,%d6 | |
1898 | jbne 35f | |
1899 | jbsr mmu_print_tuple_invalidate | |
1900 | jbra 36f | |
1901 | 35: | |
1902 | jbsr mmu_030_print_helper | |
1903 | 36: | |
1904 | movel %d5,%a4 | |
1905 | addq #1,%d2 | |
1906 | cmpib #64,%d2 | |
1907 | jbne 34b | |
1908 | 37: | |
1909 | movel %d5,%a4 | |
1910 | addq #1,%d1 | |
1911 | cmpib #128,%d1 | |
1912 | jbne 32b | |
1913 | 38: | |
1914 | movel %d5,%a4 /* move to the next logical address */ | |
1915 | addq #1,%d0 | |
1916 | cmpib #128,%d0 | |
1917 | jbne 30b | |
1918 | ||
1919 | mmu_print_done: | |
1920 | puts "\n\n" | |
1921 | ||
1922 | func_return mmu_print | |
1923 | ||
1924 | ||
1925 | mmu_030_print_helper: | |
1926 | moveml %d0-%d1,%sp@- | |
1927 | movel %a4,%d0 | |
1928 | movel %d6,%d1 | |
1929 | lea %pc@(mmu_030_print_flags),%a6 | |
1930 | jbsr mmu_print_tuple | |
1931 | moveml %sp@+,%d0-%d1 | |
1932 | rts | |
1933 | ||
1934 | mmu_print_tuple_invalidate: | |
1935 | moveml %a0/%d7,%sp@- | |
1936 | ||
1937 | lea %pc@(L(mmu_print_data)),%a0 | |
1938 | tstl %a0@(mmu_next_valid) | |
1939 | jbmi mmu_print_tuple_invalidate_exit | |
1940 | ||
1941 | movel #MMU_PRINT_INVALID,%a0@(mmu_next_valid) | |
1942 | ||
1943 | putn %a4 | |
1944 | ||
1945 | puts "##\n" | |
1946 | ||
1947 | mmu_print_tuple_invalidate_exit: | |
1948 | moveml %sp@+,%a0/%d7 | |
1949 | rts | |
1950 | ||
1951 | ||
1952 | mmu_print_tuple: | |
1953 | moveml %d0-%d7/%a0,%sp@- | |
1954 | ||
1955 | lea %pc@(L(mmu_print_data)),%a0 | |
1956 | ||
1957 | tstl %a0@(mmu_next_valid) | |
1958 | jble mmu_print_tuple_print | |
1959 | ||
1960 | cmpl %a0@(mmu_next_physical),%d1 | |
1961 | jbeq mmu_print_tuple_increment | |
1962 | ||
1963 | mmu_print_tuple_print: | |
1964 | putn %d0 | |
1965 | puts "->" | |
1966 | putn %d1 | |
1967 | ||
1968 | movel %d1,%d6 | |
1969 | jbsr %a6@ | |
1970 | ||
1971 | mmu_print_tuple_record: | |
1972 | movel #MMU_PRINT_VALID,%a0@(mmu_next_valid) | |
1973 | ||
1974 | movel %d1,%a0@(mmu_next_physical) | |
1975 | ||
1976 | mmu_print_tuple_increment: | |
1977 | movel %d5,%d7 | |
1978 | subl %a4,%d7 | |
1979 | addl %d7,%a0@(mmu_next_physical) | |
1980 | ||
1981 | mmu_print_tuple_exit: | |
1982 | moveml %sp@+,%d0-%d7/%a0 | |
1983 | rts | |
1984 | ||
1985 | mmu_print_machine_cpu_types: | |
1986 | puts "machine: " | |
1987 | ||
1988 | is_not_amiga(1f) | |
1989 | puts "amiga" | |
1990 | jbra 9f | |
1991 | 1: | |
1992 | is_not_atari(2f) | |
1993 | puts "atari" | |
1994 | jbra 9f | |
1995 | 2: | |
1996 | is_not_mac(3f) | |
1997 | puts "macintosh" | |
1998 | jbra 9f | |
1999 | 3: puts "unknown" | |
2000 | 9: putc '\n' | |
2001 | ||
2002 | puts "cputype: 0" | |
2003 | is_not_060(1f) | |
2004 | putc '6' | |
2005 | jbra 9f | |
2006 | 1: | |
2007 | is_not_040_or_060(2f) | |
2008 | putc '4' | |
2009 | jbra 9f | |
2010 | 2: putc '3' | |
2011 | 9: putc '0' | |
2012 | putc '\n' | |
2013 | ||
2014 | rts | |
2015 | #endif /* MMU_PRINT */ | |
2016 | ||
2017 | /* | |
2018 | * mmu_map_tt | |
2019 | * | |
2020 | * This is a specific function which works on all 680x0 machines. | |
2021 | * On 030, 040 & 060 it will attempt to use Transparent Translation | |
2022 | * registers (tt1). | |
2023 | * On 020 it will call the standard mmu_map which will use early | |
2024 | * terminating descriptors. | |
2025 | */ | |
2026 | func_start mmu_map_tt,%d0/%d1/%a0,4 | |
2027 | ||
2028 | dputs "mmu_map_tt:" | |
2029 | dputn ARG1 | |
2030 | dputn ARG2 | |
2031 | dputn ARG3 | |
2032 | dputn ARG4 | |
2033 | dputc '\n' | |
2034 | ||
2035 | is_020(L(do_map)) | |
2036 | ||
2037 | /* Extract the highest bit set | |
2038 | */ | |
2039 | bfffo ARG3{#0,#32},%d1 | |
2040 | cmpw #8,%d1 | |
2041 | jcc L(do_map) | |
2042 | ||
2043 | /* And get the mask | |
2044 | */ | |
2045 | moveq #-1,%d0 | |
2046 | lsrl %d1,%d0 | |
2047 | lsrl #1,%d0 | |
2048 | ||
2049 | /* Mask the address | |
2050 | */ | |
2051 | movel %d0,%d1 | |
2052 | notl %d1 | |
2053 | andl ARG2,%d1 | |
2054 | ||
2055 | /* Generate the upper 16bit of the tt register | |
2056 | */ | |
2057 | lsrl #8,%d0 | |
2058 | orl %d0,%d1 | |
2059 | clrw %d1 | |
2060 | ||
2061 | is_040_or_060(L(mmu_map_tt_040)) | |
2062 | ||
2063 | /* set 030 specific bits (read/write access for supervisor mode | |
2064 | * (highest function code set, lower two bits masked)) | |
2065 | */ | |
2066 | orw #TTR_ENABLE+TTR_RWM+TTR_FCB2+TTR_FCM1+TTR_FCM0,%d1 | |
2067 | movel ARG4,%d0 | |
2068 | btst #6,%d0 | |
2069 | jeq 1f | |
2070 | orw #TTR_CI,%d1 | |
2071 | ||
2072 | 1: lea STACK,%a0 | |
2073 | dputn %d1 | |
2074 | movel %d1,%a0@ | |
2075 | .chip 68030 | |
2076 | tstl ARG1 | |
2077 | jne 1f | |
2078 | pmove %a0@,%tt0 | |
2079 | jra 2f | |
2080 | 1: pmove %a0@,%tt1 | |
2081 | 2: .chip 68k | |
2082 | jra L(mmu_map_tt_done) | |
2083 | ||
2084 | /* set 040 specific bits | |
2085 | */ | |
2086 | L(mmu_map_tt_040): | |
2087 | orw #TTR_ENABLE+TTR_KERNELMODE,%d1 | |
2088 | orl ARG4,%d1 | |
2089 | dputn %d1 | |
2090 | ||
2091 | .chip 68040 | |
2092 | tstl ARG1 | |
2093 | jne 1f | |
2094 | movec %d1,%itt0 | |
2095 | movec %d1,%dtt0 | |
2096 | jra 2f | |
2097 | 1: movec %d1,%itt1 | |
2098 | movec %d1,%dtt1 | |
2099 | 2: .chip 68k | |
2100 | ||
2101 | jra L(mmu_map_tt_done) | |
2102 | ||
2103 | L(do_map): | |
2104 | mmu_map_eq ARG2,ARG3,ARG4 | |
2105 | ||
2106 | L(mmu_map_tt_done): | |
2107 | ||
2108 | func_return mmu_map_tt | |
2109 | ||
2110 | /* | |
2111 | * mmu_map | |
2112 | * | |
2113 | * This routine will map a range of memory using a pointer | |
2114 | * table and allocating the pages on the fly from the kernel. | |
2115 | * The pointer table does not have to be already linked into | |
2116 | * the root table, this routine will do that if necessary. | |
2117 | * | |
2118 | * NOTE | |
2119 | * This routine will assert failure and use the serial_putc | |
2120 | * routines in the case of a run-time error. For example, | |
2121 | * if the address is already mapped. | |
2122 | * | |
2123 | * NOTE-2 | |
2124 | * This routine will use early terminating descriptors | |
2125 | * where possible for the 68020+68851 and 68030 type | |
2126 | * processors. | |
2127 | */ | |
2128 | func_start mmu_map,%d0-%d4/%a0-%a4 | |
2129 | ||
2130 | dputs "\nmmu_map:" | |
2131 | dputn ARG1 | |
2132 | dputn ARG2 | |
2133 | dputn ARG3 | |
2134 | dputn ARG4 | |
2135 | dputc '\n' | |
2136 | ||
2137 | /* Get logical address and round it down to 256KB | |
2138 | */ | |
2139 | movel ARG1,%d0 | |
2140 | andl #-(PAGESIZE*PAGE_TABLE_SIZE),%d0 | |
2141 | movel %d0,%a3 | |
2142 | ||
2143 | /* Get the end address | |
2144 | */ | |
2145 | movel ARG1,%a4 | |
2146 | addl ARG3,%a4 | |
2147 | subql #1,%a4 | |
2148 | ||
2149 | /* Get physical address and round it down to 256KB | |
2150 | */ | |
2151 | movel ARG2,%d0 | |
2152 | andl #-(PAGESIZE*PAGE_TABLE_SIZE),%d0 | |
2153 | movel %d0,%a2 | |
2154 | ||
2155 | /* Add page attributes to the physical address | |
2156 | */ | |
2157 | movel ARG4,%d0 | |
2158 | orw #_PAGE_PRESENT+_PAGE_ACCESSED+_PAGE_DIRTY,%d0 | |
2159 | addw %d0,%a2 | |
2160 | ||
2161 | dputn %a2 | |
2162 | dputn %a3 | |
2163 | dputn %a4 | |
2164 | ||
2165 | is_not_040_or_060(L(mmu_map_030)) | |
2166 | ||
2167 | addw #_PAGE_GLOBAL040,%a2 | |
2168 | /* | |
2169 | * MMU 040 & 060 Support | |
2170 | * | |
2171 | * The MMU usage for the 040 and 060 is different enough from | |
2172 | * the 030 and 68851 that there is separate code. This comment | |
2173 | * block describes the data structures and algorithms built by | |
2174 | * this code. | |
2175 | * | |
2176 | * The 040 does not support early terminating descriptors, as | |
2177 | * the 030 does. Therefore, a third level of table is needed | |
2178 | * for the 040, and that would be the page table. In Linux, | |
2179 | * page tables are allocated directly from the memory above the | |
2180 | * kernel. | |
2181 | * | |
2182 | */ | |
2183 | ||
2184 | L(mmu_map_040): | |
2185 | /* Calculate the offset into the root table | |
2186 | */ | |
2187 | movel %a3,%d0 | |
2188 | moveq #ROOT_INDEX_SHIFT,%d1 | |
2189 | lsrl %d1,%d0 | |
2190 | mmu_get_root_table_entry %d0 | |
2191 | ||
2192 | /* Calculate the offset into the pointer table | |
2193 | */ | |
2194 | movel %a3,%d0 | |
2195 | moveq #PTR_INDEX_SHIFT,%d1 | |
2196 | lsrl %d1,%d0 | |
2197 | andl #PTR_TABLE_SIZE-1,%d0 | |
2198 | mmu_get_ptr_table_entry %a0,%d0 | |
2199 | ||
2200 | /* Calculate the offset into the page table | |
2201 | */ | |
2202 | movel %a3,%d0 | |
2203 | moveq #PAGE_INDEX_SHIFT,%d1 | |
2204 | lsrl %d1,%d0 | |
2205 | andl #PAGE_TABLE_SIZE-1,%d0 | |
2206 | mmu_get_page_table_entry %a0,%d0 | |
2207 | ||
2208 | /* The page table entry must not no be busy | |
2209 | */ | |
2210 | tstl %a0@ | |
2211 | jne L(mmu_map_error) | |
2212 | ||
2213 | /* Do the mapping and advance the pointers | |
2214 | */ | |
2215 | movel %a2,%a0@ | |
2216 | 2: | |
2217 | addw #PAGESIZE,%a2 | |
2218 | addw #PAGESIZE,%a3 | |
2219 | ||
2220 | /* Ready with mapping? | |
2221 | */ | |
2222 | lea %a3@(-1),%a0 | |
2223 | cmpl %a0,%a4 | |
2224 | jhi L(mmu_map_040) | |
2225 | jra L(mmu_map_done) | |
2226 | ||
2227 | L(mmu_map_030): | |
2228 | /* Calculate the offset into the root table | |
2229 | */ | |
2230 | movel %a3,%d0 | |
2231 | moveq #ROOT_INDEX_SHIFT,%d1 | |
2232 | lsrl %d1,%d0 | |
2233 | mmu_get_root_table_entry %d0 | |
2234 | ||
2235 | /* Check if logical address 32MB aligned, | |
2236 | * so we can try to map it once | |
2237 | */ | |
2238 | movel %a3,%d0 | |
2239 | andl #(PTR_TABLE_SIZE*PAGE_TABLE_SIZE*PAGESIZE-1)&(-ROOT_TABLE_SIZE),%d0 | |
2240 | jne 1f | |
2241 | ||
2242 | /* Is there enough to map for 32MB at once | |
2243 | */ | |
2244 | lea %a3@(PTR_TABLE_SIZE*PAGE_TABLE_SIZE*PAGESIZE-1),%a1 | |
2245 | cmpl %a1,%a4 | |
2246 | jcs 1f | |
2247 | ||
2248 | addql #1,%a1 | |
2249 | ||
2250 | /* The root table entry must not no be busy | |
2251 | */ | |
2252 | tstl %a0@ | |
2253 | jne L(mmu_map_error) | |
2254 | ||
2255 | /* Do the mapping and advance the pointers | |
2256 | */ | |
2257 | dputs "early term1" | |
2258 | dputn %a2 | |
2259 | dputn %a3 | |
2260 | dputn %a1 | |
2261 | dputc '\n' | |
2262 | movel %a2,%a0@ | |
2263 | ||
2264 | movel %a1,%a3 | |
2265 | lea %a2@(PTR_TABLE_SIZE*PAGE_TABLE_SIZE*PAGESIZE),%a2 | |
2266 | jra L(mmu_mapnext_030) | |
2267 | 1: | |
2268 | /* Calculate the offset into the pointer table | |
2269 | */ | |
2270 | movel %a3,%d0 | |
2271 | moveq #PTR_INDEX_SHIFT,%d1 | |
2272 | lsrl %d1,%d0 | |
2273 | andl #PTR_TABLE_SIZE-1,%d0 | |
2274 | mmu_get_ptr_table_entry %a0,%d0 | |
2275 | ||
2276 | /* The pointer table entry must not no be busy | |
2277 | */ | |
2278 | tstl %a0@ | |
2279 | jne L(mmu_map_error) | |
2280 | ||
2281 | /* Do the mapping and advance the pointers | |
2282 | */ | |
2283 | dputs "early term2" | |
2284 | dputn %a2 | |
2285 | dputn %a3 | |
2286 | dputc '\n' | |
2287 | movel %a2,%a0@ | |
2288 | ||
2289 | addl #PAGE_TABLE_SIZE*PAGESIZE,%a2 | |
2290 | addl #PAGE_TABLE_SIZE*PAGESIZE,%a3 | |
2291 | ||
2292 | L(mmu_mapnext_030): | |
2293 | /* Ready with mapping? | |
2294 | */ | |
2295 | lea %a3@(-1),%a0 | |
2296 | cmpl %a0,%a4 | |
2297 | jhi L(mmu_map_030) | |
2298 | jra L(mmu_map_done) | |
2299 | ||
2300 | L(mmu_map_error): | |
2301 | ||
2302 | dputs "mmu_map error:" | |
2303 | dputn %a2 | |
2304 | dputn %a3 | |
2305 | dputc '\n' | |
2306 | ||
2307 | L(mmu_map_done): | |
2308 | ||
2309 | func_return mmu_map | |
2310 | ||
2311 | /* | |
2312 | * mmu_fixup | |
2313 | * | |
2314 | * On the 040 class machines, all pages that are used for the | |
2315 | * mmu have to be fixed up. | |
2316 | */ | |
2317 | ||
2318 | func_start mmu_fixup_page_mmu_cache,%d0/%a0 | |
2319 | ||
2320 | dputs "mmu_fixup_page_mmu_cache" | |
2321 | dputn ARG1 | |
2322 | ||
2323 | /* Calculate the offset into the root table | |
2324 | */ | |
2325 | movel ARG1,%d0 | |
2326 | moveq #ROOT_INDEX_SHIFT,%d1 | |
2327 | lsrl %d1,%d0 | |
2328 | mmu_get_root_table_entry %d0 | |
2329 | ||
2330 | /* Calculate the offset into the pointer table | |
2331 | */ | |
2332 | movel ARG1,%d0 | |
2333 | moveq #PTR_INDEX_SHIFT,%d1 | |
2334 | lsrl %d1,%d0 | |
2335 | andl #PTR_TABLE_SIZE-1,%d0 | |
2336 | mmu_get_ptr_table_entry %a0,%d0 | |
2337 | ||
2338 | /* Calculate the offset into the page table | |
2339 | */ | |
2340 | movel ARG1,%d0 | |
2341 | moveq #PAGE_INDEX_SHIFT,%d1 | |
2342 | lsrl %d1,%d0 | |
2343 | andl #PAGE_TABLE_SIZE-1,%d0 | |
2344 | mmu_get_page_table_entry %a0,%d0 | |
2345 | ||
2346 | movel %a0@,%d0 | |
2347 | andil #_CACHEMASK040,%d0 | |
2348 | orl %pc@(m68k_pgtable_cachemode),%d0 | |
2349 | movel %d0,%a0@ | |
2350 | ||
2351 | dputc '\n' | |
2352 | ||
2353 | func_return mmu_fixup_page_mmu_cache | |
2354 | ||
2355 | /* | |
2356 | * mmu_temp_map | |
2357 | * | |
2358 | * create a temporary mapping to enable the mmu, | |
2359 | * this we don't need any transparation translation tricks. | |
2360 | */ | |
2361 | ||
2362 | func_start mmu_temp_map,%d0/%d1/%a0/%a1 | |
2363 | ||
2364 | dputs "mmu_temp_map" | |
2365 | dputn ARG1 | |
2366 | dputn ARG2 | |
2367 | dputc '\n' | |
2368 | ||
2369 | lea %pc@(L(temp_mmap_mem)),%a1 | |
2370 | ||
2371 | /* Calculate the offset in the root table | |
2372 | */ | |
2373 | movel ARG2,%d0 | |
2374 | moveq #ROOT_INDEX_SHIFT,%d1 | |
2375 | lsrl %d1,%d0 | |
2376 | mmu_get_root_table_entry %d0 | |
2377 | ||
2378 | /* Check if the table is temporary allocated, so we have to reuse it | |
2379 | */ | |
2380 | movel %a0@,%d0 | |
2381 | cmpl %pc@(L(memory_start)),%d0 | |
2382 | jcc 1f | |
2383 | ||
2384 | /* Temporary allocate a ptr table and insert it into the root table | |
2385 | */ | |
2386 | movel %a1@,%d0 | |
2387 | addl #PTR_TABLE_SIZE*4,%a1@ | |
2388 | orw #_PAGE_TABLE+_PAGE_ACCESSED,%d0 | |
2389 | movel %d0,%a0@ | |
2390 | dputs " (new)" | |
2391 | 1: | |
2392 | dputn %d0 | |
2393 | /* Mask the root table entry for the ptr table | |
2394 | */ | |
2395 | andw #-ROOT_TABLE_SIZE,%d0 | |
2396 | movel %d0,%a0 | |
2397 | ||
2398 | /* Calculate the offset into the pointer table | |
2399 | */ | |
2400 | movel ARG2,%d0 | |
2401 | moveq #PTR_INDEX_SHIFT,%d1 | |
2402 | lsrl %d1,%d0 | |
2403 | andl #PTR_TABLE_SIZE-1,%d0 | |
2404 | lea %a0@(%d0*4),%a0 | |
2405 | dputn %a0 | |
2406 | ||
2407 | /* Check if a temporary page table is already allocated | |
2408 | */ | |
2409 | movel %a0@,%d0 | |
2410 | jne 1f | |
2411 | ||
2412 | /* Temporary allocate a page table and insert it into the ptr table | |
2413 | */ | |
2414 | movel %a1@,%d0 | |
2415 | /* The 512 should be PAGE_TABLE_SIZE*4, but that violates the | |
2416 | alignment restriction for pointer tables on the '0[46]0. */ | |
2417 | addl #512,%a1@ | |
2418 | orw #_PAGE_TABLE+_PAGE_ACCESSED,%d0 | |
2419 | movel %d0,%a0@ | |
2420 | dputs " (new)" | |
2421 | 1: | |
2422 | dputn %d0 | |
2423 | /* Mask the ptr table entry for the page table | |
2424 | */ | |
2425 | andw #-PTR_TABLE_SIZE,%d0 | |
2426 | movel %d0,%a0 | |
2427 | ||
2428 | /* Calculate the offset into the page table | |
2429 | */ | |
2430 | movel ARG2,%d0 | |
2431 | moveq #PAGE_INDEX_SHIFT,%d1 | |
2432 | lsrl %d1,%d0 | |
2433 | andl #PAGE_TABLE_SIZE-1,%d0 | |
2434 | lea %a0@(%d0*4),%a0 | |
2435 | dputn %a0 | |
2436 | ||
2437 | /* Insert the address into the page table | |
2438 | */ | |
2439 | movel ARG1,%d0 | |
2440 | andw #-PAGESIZE,%d0 | |
2441 | orw #_PAGE_PRESENT+_PAGE_ACCESSED+_PAGE_DIRTY,%d0 | |
2442 | movel %d0,%a0@ | |
2443 | dputn %d0 | |
2444 | ||
2445 | dputc '\n' | |
2446 | ||
2447 | func_return mmu_temp_map | |
2448 | ||
2449 | func_start mmu_engage,%d0-%d2/%a0-%a3 | |
2450 | ||
2451 | moveq #ROOT_TABLE_SIZE-1,%d0 | |
2452 | /* Temporarily use a different root table. */ | |
2453 | lea %pc@(L(kernel_pgdir_ptr)),%a0 | |
2454 | movel %a0@,%a2 | |
2455 | movel %pc@(L(memory_start)),%a1 | |
2456 | movel %a1,%a0@ | |
2457 | movel %a2,%a0 | |
2458 | 1: | |
2459 | movel %a0@+,%a1@+ | |
2460 | dbra %d0,1b | |
2461 | ||
2462 | lea %pc@(L(temp_mmap_mem)),%a0 | |
2463 | movel %a1,%a0@ | |
2464 | ||
2465 | movew #PAGESIZE-1,%d0 | |
2466 | 1: | |
2467 | clrl %a1@+ | |
2468 | dbra %d0,1b | |
2469 | ||
2470 | lea %pc@(1b),%a0 | |
2471 | movel #1b,%a1 | |
2472 | /* Skip temp mappings if phys == virt */ | |
2473 | cmpl %a0,%a1 | |
2474 | jeq 1f | |
2475 | ||
2476 | mmu_temp_map %a0,%a0 | |
2477 | mmu_temp_map %a0,%a1 | |
2478 | ||
2479 | addw #PAGESIZE,%a0 | |
2480 | addw #PAGESIZE,%a1 | |
2481 | mmu_temp_map %a0,%a0 | |
2482 | mmu_temp_map %a0,%a1 | |
2483 | 1: | |
2484 | movel %pc@(L(memory_start)),%a3 | |
2485 | movel %pc@(L(phys_kernel_start)),%d2 | |
2486 | ||
2487 | is_not_040_or_060(L(mmu_engage_030)) | |
2488 | ||
2489 | L(mmu_engage_040): | |
2490 | .chip 68040 | |
2491 | nop | |
2492 | cinva %bc | |
2493 | nop | |
2494 | pflusha | |
2495 | nop | |
2496 | movec %a3,%srp | |
2497 | movel #TC_ENABLE+TC_PAGE4K,%d0 | |
2498 | movec %d0,%tc /* enable the MMU */ | |
2499 | jmp 1f:l | |
2500 | 1: nop | |
2501 | movec %a2,%srp | |
2502 | nop | |
2503 | cinva %bc | |
2504 | nop | |
2505 | pflusha | |
2506 | .chip 68k | |
2507 | jra L(mmu_engage_cleanup) | |
2508 | ||
2509 | L(mmu_engage_030_temp): | |
2510 | .space 12 | |
2511 | L(mmu_engage_030): | |
2512 | .chip 68030 | |
2513 | lea %pc@(L(mmu_engage_030_temp)),%a0 | |
2514 | movel #0x80000002,%a0@ | |
2515 | movel %a3,%a0@(4) | |
2516 | movel #0x0808,%d0 | |
2517 | movec %d0,%cacr | |
2518 | pmove %a0@,%srp | |
2519 | pflusha | |
2520 | /* | |
2521 | * enable,super root enable,4096 byte pages,7 bit root index, | |
2522 | * 7 bit pointer index, 6 bit page table index. | |
2523 | */ | |
2524 | movel #0x82c07760,%a0@(8) | |
2525 | pmove %a0@(8),%tc /* enable the MMU */ | |
2526 | jmp 1f:l | |
2527 | 1: movel %a2,%a0@(4) | |
2528 | movel #0x0808,%d0 | |
2529 | movec %d0,%cacr | |
2530 | pmove %a0@,%srp | |
2531 | pflusha | |
2532 | .chip 68k | |
2533 | ||
2534 | L(mmu_engage_cleanup): | |
2535 | subl #PAGE_OFFSET,%d2 | |
2536 | subl %d2,%a2 | |
2537 | movel %a2,L(kernel_pgdir_ptr) | |
2538 | subl %d2,%fp | |
2539 | subl %d2,%sp | |
2540 | subl %d2,ARG0 | |
2541 | ||
2542 | func_return mmu_engage | |
2543 | ||
2544 | func_start mmu_get_root_table_entry,%d0/%a1 | |
2545 | ||
2546 | #if 0 | |
2547 | dputs "mmu_get_root_table_entry:" | |
2548 | dputn ARG1 | |
2549 | dputs " =" | |
2550 | #endif | |
2551 | ||
2552 | movel %pc@(L(kernel_pgdir_ptr)),%a0 | |
2553 | tstl %a0 | |
2554 | jne 2f | |
2555 | ||
2556 | dputs "\nmmu_init:" | |
2557 | ||
2558 | /* Find the start of free memory, get_bi_record does this for us, | |
2559 | * as the bootinfo structure is located directly behind the kernel | |
2560 | * and and we simply search for the last entry. | |
2561 | */ | |
2562 | get_bi_record BI_LAST | |
2563 | addw #PAGESIZE-1,%a0 | |
2564 | movel %a0,%d0 | |
2565 | andw #-PAGESIZE,%d0 | |
2566 | ||
2567 | dputn %d0 | |
2568 | ||
2569 | lea %pc@(L(memory_start)),%a0 | |
2570 | movel %d0,%a0@ | |
2571 | lea %pc@(L(kernel_end)),%a0 | |
2572 | movel %d0,%a0@ | |
2573 | ||
2574 | /* we have to return the first page at _stext since the init code | |
2575 | * in mm/init.c simply expects kernel_pg_dir there, the rest of | |
2576 | * page is used for further ptr tables in get_ptr_table. | |
2577 | */ | |
2578 | lea %pc@(_stext),%a0 | |
2579 | lea %pc@(L(mmu_cached_pointer_tables)),%a1 | |
2580 | movel %a0,%a1@ | |
2581 | addl #ROOT_TABLE_SIZE*4,%a1@ | |
2582 | ||
2583 | lea %pc@(L(mmu_num_pointer_tables)),%a1 | |
2584 | addql #1,%a1@ | |
2585 | ||
2586 | /* clear the page | |
2587 | */ | |
2588 | movel %a0,%a1 | |
2589 | movew #PAGESIZE/4-1,%d0 | |
2590 | 1: | |
2591 | clrl %a1@+ | |
2592 | dbra %d0,1b | |
2593 | ||
2594 | lea %pc@(L(kernel_pgdir_ptr)),%a1 | |
2595 | movel %a0,%a1@ | |
2596 | ||
2597 | dputn %a0 | |
2598 | dputc '\n' | |
2599 | 2: | |
2600 | movel ARG1,%d0 | |
2601 | lea %a0@(%d0*4),%a0 | |
2602 | ||
2603 | #if 0 | |
2604 | dputn %a0 | |
2605 | dputc '\n' | |
2606 | #endif | |
2607 | ||
2608 | func_return mmu_get_root_table_entry | |
2609 | ||
2610 | ||
2611 | ||
2612 | func_start mmu_get_ptr_table_entry,%d0/%a1 | |
2613 | ||
2614 | #if 0 | |
2615 | dputs "mmu_get_ptr_table_entry:" | |
2616 | dputn ARG1 | |
2617 | dputn ARG2 | |
2618 | dputs " =" | |
2619 | #endif | |
2620 | ||
2621 | movel ARG1,%a0 | |
2622 | movel %a0@,%d0 | |
2623 | jne 2f | |
2624 | ||
2625 | /* Keep track of the number of pointer tables we use | |
2626 | */ | |
2627 | dputs "\nmmu_get_new_ptr_table:" | |
2628 | lea %pc@(L(mmu_num_pointer_tables)),%a0 | |
2629 | movel %a0@,%d0 | |
2630 | addql #1,%a0@ | |
2631 | ||
2632 | /* See if there is a free pointer table in our cache of pointer tables | |
2633 | */ | |
2634 | lea %pc@(L(mmu_cached_pointer_tables)),%a1 | |
2635 | andw #7,%d0 | |
2636 | jne 1f | |
2637 | ||
2638 | /* Get a new pointer table page from above the kernel memory | |
2639 | */ | |
2640 | get_new_page | |
2641 | movel %a0,%a1@ | |
2642 | 1: | |
2643 | /* There is an unused pointer table in our cache... use it | |
2644 | */ | |
2645 | movel %a1@,%d0 | |
2646 | addl #PTR_TABLE_SIZE*4,%a1@ | |
2647 | ||
2648 | dputn %d0 | |
2649 | dputc '\n' | |
2650 | ||
2651 | /* Insert the new pointer table into the root table | |
2652 | */ | |
2653 | movel ARG1,%a0 | |
2654 | orw #_PAGE_TABLE+_PAGE_ACCESSED,%d0 | |
2655 | movel %d0,%a0@ | |
2656 | 2: | |
2657 | /* Extract the pointer table entry | |
2658 | */ | |
2659 | andw #-PTR_TABLE_SIZE,%d0 | |
2660 | movel %d0,%a0 | |
2661 | movel ARG2,%d0 | |
2662 | lea %a0@(%d0*4),%a0 | |
2663 | ||
2664 | #if 0 | |
2665 | dputn %a0 | |
2666 | dputc '\n' | |
2667 | #endif | |
2668 | ||
2669 | func_return mmu_get_ptr_table_entry | |
2670 | ||
2671 | ||
2672 | func_start mmu_get_page_table_entry,%d0/%a1 | |
2673 | ||
2674 | #if 0 | |
2675 | dputs "mmu_get_page_table_entry:" | |
2676 | dputn ARG1 | |
2677 | dputn ARG2 | |
2678 | dputs " =" | |
2679 | #endif | |
2680 | ||
2681 | movel ARG1,%a0 | |
2682 | movel %a0@,%d0 | |
2683 | jne 2f | |
2684 | ||
2685 | /* If the page table entry doesn't exist, we allocate a complete new | |
2686 | * page and use it as one continues big page table which can cover | |
2687 | * 4MB of memory, nearly almost all mappings have that alignment. | |
2688 | */ | |
2689 | get_new_page | |
2690 | addw #_PAGE_TABLE+_PAGE_ACCESSED,%a0 | |
2691 | ||
2692 | /* align pointer table entry for a page of page tables | |
2693 | */ | |
2694 | movel ARG1,%d0 | |
2695 | andw #-(PAGESIZE/PAGE_TABLE_SIZE),%d0 | |
2696 | movel %d0,%a1 | |
2697 | ||
2698 | /* Insert the page tables into the pointer entries | |
2699 | */ | |
2700 | moveq #PAGESIZE/PAGE_TABLE_SIZE/4-1,%d0 | |
2701 | 1: | |
2702 | movel %a0,%a1@+ | |
2703 | lea %a0@(PAGE_TABLE_SIZE*4),%a0 | |
2704 | dbra %d0,1b | |
2705 | ||
2706 | /* Now we can get the initialized pointer table entry | |
2707 | */ | |
2708 | movel ARG1,%a0 | |
2709 | movel %a0@,%d0 | |
2710 | 2: | |
2711 | /* Extract the page table entry | |
2712 | */ | |
2713 | andw #-PAGE_TABLE_SIZE,%d0 | |
2714 | movel %d0,%a0 | |
2715 | movel ARG2,%d0 | |
2716 | lea %a0@(%d0*4),%a0 | |
2717 | ||
2718 | #if 0 | |
2719 | dputn %a0 | |
2720 | dputc '\n' | |
2721 | #endif | |
2722 | ||
2723 | func_return mmu_get_page_table_entry | |
2724 | ||
2725 | /* | |
2726 | * get_new_page | |
2727 | * | |
2728 | * Return a new page from the memory start and clear it. | |
2729 | */ | |
2730 | func_start get_new_page,%d0/%a1 | |
2731 | ||
2732 | dputs "\nget_new_page:" | |
2733 | ||
2734 | /* allocate the page and adjust memory_start | |
2735 | */ | |
2736 | lea %pc@(L(memory_start)),%a0 | |
2737 | movel %a0@,%a1 | |
2738 | addl #PAGESIZE,%a0@ | |
2739 | ||
2740 | /* clear the new page | |
2741 | */ | |
2742 | movel %a1,%a0 | |
2743 | movew #PAGESIZE/4-1,%d0 | |
2744 | 1: | |
2745 | clrl %a1@+ | |
2746 | dbra %d0,1b | |
2747 | ||
2748 | dputn %a0 | |
2749 | dputc '\n' | |
2750 | ||
2751 | func_return get_new_page | |
2752 | ||
2753 | ||
2754 | ||
2755 | /* | |
2756 | * Debug output support | |
2757 | * Atarians have a choice between the parallel port, the serial port | |
2758 | * from the MFP or a serial port of the SCC | |
2759 | */ | |
2760 | ||
2761 | #ifdef CONFIG_MAC | |
2762 | ||
2763 | L(scc_initable_mac): | |
2764 | .byte 9,12 /* Reset */ | |
2765 | .byte 4,0x44 /* x16, 1 stopbit, no parity */ | |
2766 | .byte 3,0xc0 /* receiver: 8 bpc */ | |
2767 | .byte 5,0xe2 /* transmitter: 8 bpc, assert dtr/rts */ | |
2768 | .byte 9,0 /* no interrupts */ | |
2769 | .byte 10,0 /* NRZ */ | |
2770 | .byte 11,0x50 /* use baud rate generator */ | |
2771 | .byte 12,10,13,0 /* 9600 baud */ | |
2772 | .byte 14,1 /* Baud rate generator enable */ | |
2773 | .byte 3,0xc1 /* enable receiver */ | |
2774 | .byte 5,0xea /* enable transmitter */ | |
2775 | .byte -1 | |
2776 | .even | |
2777 | #endif | |
2778 | ||
2779 | #ifdef CONFIG_ATARI | |
2780 | /* #define USE_PRINTER */ | |
2781 | /* #define USE_SCC_B */ | |
2782 | /* #define USE_SCC_A */ | |
2783 | #define USE_MFP | |
2784 | ||
2785 | #if defined(USE_SCC_A) || defined(USE_SCC_B) | |
2786 | #define USE_SCC | |
2787 | /* Initialisation table for SCC */ | |
2788 | L(scc_initable): | |
2789 | .byte 9,12 /* Reset */ | |
2790 | .byte 4,0x44 /* x16, 1 stopbit, no parity */ | |
2791 | .byte 3,0xc0 /* receiver: 8 bpc */ | |
2792 | .byte 5,0xe2 /* transmitter: 8 bpc, assert dtr/rts */ | |
2793 | .byte 9,0 /* no interrupts */ | |
2794 | .byte 10,0 /* NRZ */ | |
2795 | .byte 11,0x50 /* use baud rate generator */ | |
2796 | .byte 12,24,13,0 /* 9600 baud */ | |
2797 | .byte 14,2,14,3 /* use master clock for BRG, enable */ | |
2798 | .byte 3,0xc1 /* enable receiver */ | |
2799 | .byte 5,0xea /* enable transmitter */ | |
2800 | .byte -1 | |
2801 | .even | |
2802 | #endif | |
2803 | ||
2804 | #ifdef USE_PRINTER | |
2805 | ||
2806 | LPSG_SELECT = 0xff8800 | |
2807 | LPSG_READ = 0xff8800 | |
2808 | LPSG_WRITE = 0xff8802 | |
2809 | LPSG_IO_A = 14 | |
2810 | LPSG_IO_B = 15 | |
2811 | LPSG_CONTROL = 7 | |
2812 | LSTMFP_GPIP = 0xfffa01 | |
2813 | LSTMFP_DDR = 0xfffa05 | |
2814 | LSTMFP_IERB = 0xfffa09 | |
2815 | ||
2816 | #elif defined(USE_SCC_B) | |
2817 | ||
2818 | LSCC_CTRL = 0xff8c85 | |
2819 | LSCC_DATA = 0xff8c87 | |
2820 | ||
2821 | #elif defined(USE_SCC_A) | |
2822 | ||
2823 | LSCC_CTRL = 0xff8c81 | |
2824 | LSCC_DATA = 0xff8c83 | |
2825 | ||
2826 | #elif defined(USE_MFP) | |
2827 | ||
2828 | LMFP_UCR = 0xfffa29 | |
2829 | LMFP_TDCDR = 0xfffa1d | |
2830 | LMFP_TDDR = 0xfffa25 | |
2831 | LMFP_TSR = 0xfffa2d | |
2832 | LMFP_UDR = 0xfffa2f | |
2833 | ||
2834 | #endif | |
2835 | #endif /* CONFIG_ATARI */ | |
2836 | ||
2837 | /* | |
2838 | * Serial port output support. | |
2839 | */ | |
2840 | ||
2841 | /* | |
2842 | * Initialize serial port hardware for 9600/8/1 | |
2843 | */ | |
2844 | func_start serial_init,%d0/%d1/%a0/%a1 | |
2845 | /* | |
2846 | * Some of the register usage that follows | |
2847 | * CONFIG_AMIGA | |
2848 | * a0 = pointer to boot info record | |
2849 | * d0 = boot info offset | |
2850 | * CONFIG_ATARI | |
2851 | * a0 = address of SCC | |
2852 | * a1 = Liobase address/address of scc_initable | |
2853 | * d0 = init data for serial port | |
2854 | * CONFIG_MAC | |
2855 | * a0 = address of SCC | |
2856 | * a1 = address of scc_initable_mac | |
2857 | * d0 = init data for serial port | |
2858 | */ | |
2859 | ||
2860 | #ifdef CONFIG_AMIGA | |
2861 | #define SERIAL_DTR 7 | |
2862 | #define SERIAL_CNTRL CIABBASE+C_PRA | |
2863 | ||
2864 | is_not_amiga(1f) | |
2865 | lea %pc@(L(custom)),%a0 | |
2866 | movel #-ZTWOBASE,%a0@ | |
2867 | bclr #SERIAL_DTR,SERIAL_CNTRL-ZTWOBASE | |
2868 | get_bi_record BI_AMIGA_SERPER | |
2869 | movew %a0@,CUSTOMBASE+C_SERPER-ZTWOBASE | |
2870 | | movew #61,CUSTOMBASE+C_SERPER-ZTWOBASE | |
2871 | 1: | |
2872 | #endif | |
2873 | #ifdef CONFIG_ATARI | |
2874 | is_not_atari(4f) | |
2875 | movel %pc@(L(iobase)),%a1 | |
2876 | #if defined(USE_PRINTER) | |
2877 | bclr #0,%a1@(LSTMFP_IERB) | |
2878 | bclr #0,%a1@(LSTMFP_DDR) | |
2879 | moveb #LPSG_CONTROL,%a1@(LPSG_SELECT) | |
2880 | moveb #0xff,%a1@(LPSG_WRITE) | |
2881 | moveb #LPSG_IO_B,%a1@(LPSG_SELECT) | |
2882 | clrb %a1@(LPSG_WRITE) | |
2883 | moveb #LPSG_IO_A,%a1@(LPSG_SELECT) | |
2884 | moveb %a1@(LPSG_READ),%d0 | |
2885 | bset #5,%d0 | |
2886 | moveb %d0,%a1@(LPSG_WRITE) | |
2887 | #elif defined(USE_SCC) | |
2888 | lea %a1@(LSCC_CTRL),%a0 | |
2889 | lea %pc@(L(scc_initable)),%a1 | |
2890 | 2: moveb %a1@+,%d0 | |
2891 | jmi 3f | |
2892 | moveb %d0,%a0@ | |
2893 | moveb %a1@+,%a0@ | |
2894 | jra 2b | |
2895 | 3: clrb %a0@ | |
2896 | #elif defined(USE_MFP) | |
2897 | bclr #1,%a1@(LMFP_TSR) | |
2898 | moveb #0x88,%a1@(LMFP_UCR) | |
2899 | andb #0x70,%a1@(LMFP_TDCDR) | |
2900 | moveb #2,%a1@(LMFP_TDDR) | |
2901 | orb #1,%a1@(LMFP_TDCDR) | |
2902 | bset #1,%a1@(LMFP_TSR) | |
2903 | #endif | |
2904 | jra L(serial_init_done) | |
2905 | 4: | |
2906 | #endif | |
2907 | #ifdef CONFIG_MAC | |
2908 | is_not_mac(L(serial_init_not_mac)) | |
2909 | #ifdef MAC_SERIAL_DEBUG | |
2910 | #if !defined(MAC_USE_SCC_A) && !defined(MAC_USE_SCC_B) | |
2911 | #define MAC_USE_SCC_B | |
2912 | #endif | |
2913 | #define mac_scc_cha_b_ctrl_offset 0x0 | |
2914 | #define mac_scc_cha_a_ctrl_offset 0x2 | |
2915 | #define mac_scc_cha_b_data_offset 0x4 | |
2916 | #define mac_scc_cha_a_data_offset 0x6 | |
2917 | ||
2918 | #ifdef MAC_USE_SCC_A | |
2919 | /* Initialize channel A */ | |
2920 | movel %pc@(L(mac_sccbase)),%a0 | |
2921 | lea %pc@(L(scc_initable_mac)),%a1 | |
2922 | 5: moveb %a1@+,%d0 | |
2923 | jmi 6f | |
2924 | moveb %d0,%a0@(mac_scc_cha_a_ctrl_offset) | |
2925 | moveb %a1@+,%a0@(mac_scc_cha_a_ctrl_offset) | |
2926 | jra 5b | |
2927 | 6: | |
2928 | #endif /* MAC_USE_SCC_A */ | |
2929 | ||
2930 | #ifdef MAC_USE_SCC_B | |
2931 | /* Initialize channel B */ | |
2932 | #ifndef MAC_USE_SCC_A /* Load mac_sccbase only if needed */ | |
2933 | movel %pc@(L(mac_sccbase)),%a0 | |
2934 | #endif /* MAC_USE_SCC_A */ | |
2935 | lea %pc@(L(scc_initable_mac)),%a1 | |
2936 | 7: moveb %a1@+,%d0 | |
2937 | jmi 8f | |
2938 | moveb %d0,%a0@(mac_scc_cha_b_ctrl_offset) | |
2939 | moveb %a1@+,%a0@(mac_scc_cha_b_ctrl_offset) | |
2940 | jra 7b | |
2941 | 8: | |
2942 | #endif /* MAC_USE_SCC_B */ | |
2943 | #endif /* MAC_SERIAL_DEBUG */ | |
2944 | ||
2945 | jra L(serial_init_done) | |
2946 | L(serial_init_not_mac): | |
2947 | #endif /* CONFIG_MAC */ | |
2948 | ||
2949 | #ifdef CONFIG_Q40 | |
2950 | is_not_q40(2f) | |
2951 | /* debug output goes into SRAM, so we don't do it unless requested | |
2952 | - check for '%LX$' signature in SRAM */ | |
2953 | lea %pc@(q40_mem_cptr),%a1 | |
2954 | move.l #0xff020010,%a1@ /* must be inited - also used by debug=mem */ | |
2955 | move.l #0xff020000,%a1 | |
2956 | cmp.b #'%',%a1@ | |
2957 | bne 2f /*nodbg*/ | |
2958 | addq.w #4,%a1 | |
2959 | cmp.b #'L',%a1@ | |
2960 | bne 2f /*nodbg*/ | |
2961 | addq.w #4,%a1 | |
2962 | cmp.b #'X',%a1@ | |
2963 | bne 2f /*nodbg*/ | |
2964 | addq.w #4,%a1 | |
2965 | cmp.b #'$',%a1@ | |
2966 | bne 2f /*nodbg*/ | |
2967 | /* signature OK */ | |
2968 | lea %pc@(L(q40_do_debug)),%a1 | |
2969 | tas %a1@ | |
2970 | /*nodbg: q40_do_debug is 0 by default*/ | |
2971 | 2: | |
2972 | #endif | |
2973 | ||
2974 | #ifdef CONFIG_APOLLO | |
2975 | /* We count on the PROM initializing SIO1 */ | |
2976 | #endif | |
2977 | ||
2978 | #ifdef CONFIG_HP300 | |
2979 | /* We count on the boot loader initialising the UART */ | |
2980 | #endif | |
2981 | ||
2982 | L(serial_init_done): | |
2983 | func_return serial_init | |
2984 | ||
2985 | /* | |
2986 | * Output character on serial port. | |
2987 | */ | |
2988 | func_start serial_putc,%d0/%d1/%a0/%a1 | |
2989 | ||
2990 | movel ARG1,%d0 | |
2991 | cmpib #'\n',%d0 | |
2992 | jbne 1f | |
2993 | ||
2994 | /* A little safe recursion is good for the soul */ | |
2995 | serial_putc #'\r' | |
2996 | 1: | |
2997 | ||
2998 | #ifdef CONFIG_AMIGA | |
2999 | is_not_amiga(2f) | |
3000 | andw #0x00ff,%d0 | |
3001 | oriw #0x0100,%d0 | |
3002 | movel %pc@(L(custom)),%a0 | |
3003 | movew %d0,%a0@(CUSTOMBASE+C_SERDAT) | |
3004 | 1: movew %a0@(CUSTOMBASE+C_SERDATR),%d0 | |
3005 | andw #0x2000,%d0 | |
3006 | jeq 1b | |
3007 | jra L(serial_putc_done) | |
3008 | 2: | |
3009 | #endif | |
3010 | ||
3011 | #ifdef CONFIG_MAC | |
3012 | is_not_mac(5f) | |
3013 | ||
3014 | #ifdef MAC_SERIAL_DEBUG | |
3015 | ||
3016 | #ifdef MAC_USE_SCC_A | |
3017 | movel %pc@(L(mac_sccbase)),%a1 | |
3018 | 3: btst #2,%a1@(mac_scc_cha_a_ctrl_offset) | |
3019 | jeq 3b | |
3020 | moveb %d0,%a1@(mac_scc_cha_a_data_offset) | |
3021 | #endif /* MAC_USE_SCC_A */ | |
3022 | ||
3023 | #ifdef MAC_USE_SCC_B | |
3024 | #ifndef MAC_USE_SCC_A /* Load mac_sccbase only if needed */ | |
3025 | movel %pc@(L(mac_sccbase)),%a1 | |
3026 | #endif /* MAC_USE_SCC_A */ | |
3027 | 4: btst #2,%a1@(mac_scc_cha_b_ctrl_offset) | |
3028 | jeq 4b | |
3029 | moveb %d0,%a1@(mac_scc_cha_b_data_offset) | |
3030 | #endif /* MAC_USE_SCC_B */ | |
3031 | ||
3032 | #endif /* MAC_SERIAL_DEBUG */ | |
3033 | ||
3034 | jra L(serial_putc_done) | |
3035 | 5: | |
3036 | #endif /* CONFIG_MAC */ | |
3037 | ||
3038 | #ifdef CONFIG_ATARI | |
3039 | is_not_atari(4f) | |
3040 | movel %pc@(L(iobase)),%a1 | |
3041 | #if defined(USE_PRINTER) | |
3042 | 3: btst #0,%a1@(LSTMFP_GPIP) | |
3043 | jne 3b | |
3044 | moveb #LPSG_IO_B,%a1@(LPSG_SELECT) | |
3045 | moveb %d0,%a1@(LPSG_WRITE) | |
3046 | moveb #LPSG_IO_A,%a1@(LPSG_SELECT) | |
3047 | moveb %a1@(LPSG_READ),%d0 | |
3048 | bclr #5,%d0 | |
3049 | moveb %d0,%a1@(LPSG_WRITE) | |
3050 | nop | |
3051 | nop | |
3052 | bset #5,%d0 | |
3053 | moveb %d0,%a1@(LPSG_WRITE) | |
3054 | #elif defined(USE_SCC) | |
3055 | 3: btst #2,%a1@(LSCC_CTRL) | |
3056 | jeq 3b | |
3057 | moveb %d0,%a1@(LSCC_DATA) | |
3058 | #elif defined(USE_MFP) | |
3059 | 3: btst #7,%a1@(LMFP_TSR) | |
3060 | jeq 3b | |
3061 | moveb %d0,%a1@(LMFP_UDR) | |
3062 | #endif | |
3063 | jra L(serial_putc_done) | |
3064 | 4: | |
3065 | #endif /* CONFIG_ATARI */ | |
3066 | ||
3067 | #ifdef CONFIG_MVME147 | |
3068 | is_not_mvme147(2f) | |
3069 | 1: btst #2,M147_SCC_CTRL_A | |
3070 | jeq 1b | |
3071 | moveb %d0,M147_SCC_DATA_A | |
3072 | jbra L(serial_putc_done) | |
3073 | 2: | |
3074 | #endif | |
3075 | ||
3076 | #ifdef CONFIG_MVME16x | |
3077 | is_not_mvme16x(2f) | |
3078 | /* | |
3079 | * If the loader gave us a board type then we can use that to | |
3080 | * select an appropriate output routine; otherwise we just use | |
3081 | * the Bug code. If we haev to use the Bug that means the Bug | |
3082 | * workspace has to be valid, which means the Bug has to use | |
3083 | * the SRAM, which is non-standard. | |
3084 | */ | |
3085 | moveml %d0-%d7/%a2-%a6,%sp@- | |
3086 | movel vme_brdtype,%d1 | |
3087 | jeq 1f | No tag - use the Bug | |
3088 | cmpi #VME_TYPE_MVME162,%d1 | |
3089 | jeq 6f | |
3090 | cmpi #VME_TYPE_MVME172,%d1 | |
3091 | jne 5f | |
3092 | /* 162/172; it's an SCC */ | |
3093 | 6: btst #2,M162_SCC_CTRL_A | |
3094 | nop | |
3095 | nop | |
3096 | nop | |
3097 | jeq 6b | |
3098 | moveb #8,M162_SCC_CTRL_A | |
3099 | nop | |
3100 | nop | |
3101 | nop | |
3102 | moveb %d0,M162_SCC_CTRL_A | |
3103 | jra 3f | |
3104 | 5: | |
3105 | /* 166/167/177; it's a CD2401 */ | |
3106 | moveb #0,M167_CYCAR | |
3107 | moveb M167_CYIER,%d2 | |
3108 | moveb #0x02,M167_CYIER | |
3109 | 7: | |
3110 | btst #5,M167_PCSCCTICR | |
3111 | jeq 7b | |
3112 | moveb M167_PCTPIACKR,%d1 | |
3113 | moveb M167_CYLICR,%d1 | |
3114 | jeq 8f | |
3115 | moveb #0x08,M167_CYTEOIR | |
3116 | jra 7b | |
3117 | 8: | |
3118 | moveb %d0,M167_CYTDR | |
3119 | moveb #0,M167_CYTEOIR | |
3120 | moveb %d2,M167_CYIER | |
3121 | jra 3f | |
3122 | 1: | |
3123 | moveb %d0,%sp@- | |
3124 | trap #15 | |
3125 | .word 0x0020 /* TRAP 0x020 */ | |
3126 | 3: | |
3127 | moveml %sp@+,%d0-%d7/%a2-%a6 | |
3128 | jbra L(serial_putc_done) | |
3129 | 2: | |
3130 | #endif /* CONFIG_MVME16x */ | |
3131 | ||
3132 | #ifdef CONFIG_BVME6000 | |
3133 | is_not_bvme6000(2f) | |
3134 | /* | |
3135 | * The BVME6000 machine has a serial port ... | |
3136 | */ | |
3137 | 1: btst #2,BVME_SCC_CTRL_A | |
3138 | jeq 1b | |
3139 | moveb %d0,BVME_SCC_DATA_A | |
3140 | jbra L(serial_putc_done) | |
3141 | 2: | |
3142 | #endif | |
3143 | ||
3144 | #ifdef CONFIG_SUN3X | |
3145 | is_not_sun3x(2f) | |
3146 | movel %d0,-(%sp) | |
3147 | movel 0xFEFE0018,%a1 | |
3148 | jbsr (%a1) | |
3149 | addq #4,%sp | |
3150 | jbra L(serial_putc_done) | |
3151 | 2: | |
3152 | #endif | |
3153 | ||
3154 | #ifdef CONFIG_Q40 | |
3155 | is_not_q40(2f) | |
3156 | tst.l %pc@(L(q40_do_debug)) /* only debug if requested */ | |
3157 | beq 2f | |
3158 | lea %pc@(q40_mem_cptr),%a1 | |
3159 | move.l %a1@,%a0 | |
3160 | move.b %d0,%a0@ | |
3161 | addq.l #4,%a0 | |
3162 | move.l %a0,%a1@ | |
3163 | jbra L(serial_putc_done) | |
3164 | 2: | |
3165 | #endif | |
3166 | ||
3167 | #ifdef CONFIG_APOLLO | |
3168 | is_not_apollo(2f) | |
3169 | movl %pc@(L(iobase)),%a1 | |
3170 | moveb %d0,%a1@(LTHRB0) | |
3171 | 1: moveb %a1@(LSRB0),%d0 | |
3172 | andb #0x4,%d0 | |
3173 | beq 1b | |
3174 | jbra L(serial_putc_done) | |
3175 | 2: | |
3176 | #endif | |
3177 | ||
3178 | #ifdef CONFIG_HP300 | |
3179 | is_not_hp300(3f) | |
3180 | movl %pc@(L(iobase)),%a1 | |
3181 | addl %pc@(L(uartbase)),%a1 | |
3182 | movel %pc@(L(uart_scode)),%d1 /* Check the scode */ | |
3183 | jmi 3f /* Unset? Exit */ | |
3184 | cmpi #256,%d1 /* APCI scode? */ | |
3185 | jeq 2f | |
3186 | 1: moveb %a1@(DCALSR),%d1 /* Output to DCA */ | |
3187 | andb #0x20,%d1 | |
3188 | beq 1b | |
3189 | moveb %d0,%a1@(DCADATA) | |
3190 | jbra L(serial_putc_done) | |
3191 | 2: moveb %a1@(APCILSR),%d1 /* Output to APCI */ | |
3192 | andb #0x20,%d1 | |
3193 | beq 2b | |
3194 | moveb %d0,%a1@(APCIDATA) | |
3195 | jbra L(serial_putc_done) | |
3196 | 3: | |
3197 | #endif | |
6ff5801a | 3198 | |
1da177e4 LT |
3199 | L(serial_putc_done): |
3200 | func_return serial_putc | |
3201 | ||
3202 | /* | |
3203 | * Output a string. | |
3204 | */ | |
3205 | func_start puts,%d0/%a0 | |
3206 | ||
3207 | movel ARG1,%a0 | |
3208 | jra 2f | |
3209 | 1: | |
3210 | #ifdef CONSOLE | |
3211 | console_putc %d0 | |
3212 | #endif | |
3213 | #ifdef SERIAL_DEBUG | |
3214 | serial_putc %d0 | |
3215 | #endif | |
3216 | 2: moveb %a0@+,%d0 | |
3217 | jne 1b | |
3218 | ||
3219 | func_return puts | |
3220 | ||
3221 | /* | |
3222 | * Output number in hex notation. | |
3223 | */ | |
3224 | ||
3225 | func_start putn,%d0-%d2 | |
3226 | ||
3227 | putc ' ' | |
3228 | ||
3229 | movel ARG1,%d0 | |
3230 | moveq #7,%d1 | |
3231 | 1: roll #4,%d0 | |
3232 | move %d0,%d2 | |
3233 | andb #0x0f,%d2 | |
3234 | addb #'0',%d2 | |
3235 | cmpb #'9',%d2 | |
3236 | jls 2f | |
3237 | addb #'A'-('9'+1),%d2 | |
3238 | 2: | |
3239 | #ifdef CONSOLE | |
3240 | console_putc %d2 | |
3241 | #endif | |
3242 | #ifdef SERIAL_DEBUG | |
3243 | serial_putc %d2 | |
3244 | #endif | |
3245 | dbra %d1,1b | |
3246 | ||
3247 | func_return putn | |
3248 | ||
3249 | #ifdef CONFIG_MAC | |
3250 | /* | |
3251 | * mac_serial_print | |
3252 | * | |
3253 | * This routine takes its parameters on the stack. It then | |
3254 | * turns around and calls the internal routine. This routine | |
3255 | * is used until the Linux console driver initializes itself. | |
3256 | * | |
3257 | * The calling parameters are: | |
3258 | * void mac_serial_print(const char *str); | |
3259 | * | |
3260 | * This routine does NOT understand variable arguments only | |
3261 | * simple strings! | |
3262 | */ | |
3263 | ENTRY(mac_serial_print) | |
3264 | moveml %d0/%a0,%sp@- | |
3265 | #if 1 | |
3266 | move %sr,%sp@- | |
3267 | ori #0x0700,%sr | |
3268 | #endif | |
3269 | movel %sp@(10),%a0 /* fetch parameter */ | |
3270 | jra 2f | |
3271 | 1: serial_putc %d0 | |
3272 | 2: moveb %a0@+,%d0 | |
3273 | jne 1b | |
3274 | #if 1 | |
3275 | move %sp@+,%sr | |
3276 | #endif | |
3277 | moveml %sp@+,%d0/%a0 | |
3278 | rts | |
3279 | #endif /* CONFIG_MAC */ | |
3280 | ||
3281 | #if defined(CONFIG_HP300) || defined(CONFIG_APOLLO) | |
3282 | func_start set_leds,%d0/%a0 | |
3283 | movel ARG1,%d0 | |
3284 | #ifdef CONFIG_HP300 | |
3285 | is_not_hp300(1f) | |
3286 | movel %pc@(L(iobase)),%a0 | |
3287 | moveb %d0,%a0@(0x1ffff) | |
3288 | jra 2f | |
3289 | #endif | |
3290 | 1: | |
3291 | #ifdef CONFIG_APOLLO | |
3292 | movel %pc@(L(iobase)),%a0 | |
3293 | lsll #8,%d0 | |
3294 | eorw #0xff00,%d0 | |
3295 | moveb %d0,%a0@(LCPUCTRL) | |
3296 | #endif | |
3297 | 2: | |
3298 | func_return set_leds | |
3299 | #endif | |
3300 | ||
3301 | #ifdef CONSOLE | |
3302 | /* | |
3303 | * For continuity, see the data alignment | |
3304 | * to which this structure is tied. | |
3305 | */ | |
3306 | #define Lconsole_struct_cur_column 0 | |
3307 | #define Lconsole_struct_cur_row 4 | |
3308 | #define Lconsole_struct_num_columns 8 | |
3309 | #define Lconsole_struct_num_rows 12 | |
3310 | #define Lconsole_struct_left_edge 16 | |
3311 | #define Lconsole_struct_penguin_putc 20 | |
3312 | ||
3313 | func_start console_init,%a0-%a4/%d0-%d7 | |
3314 | /* | |
3315 | * Some of the register usage that follows | |
3316 | * a0 = pointer to boot_info | |
3317 | * a1 = pointer to screen | |
3318 | * a2 = pointer to Lconsole_globals | |
3319 | * d3 = pixel width of screen | |
3320 | * d4 = pixel height of screen | |
3321 | * (d3,d4) ~= (x,y) of a point just below | |
3322 | * and to the right of the screen | |
3323 | * NOT on the screen! | |
3324 | * d5 = number of bytes per scan line | |
3325 | * d6 = number of bytes on the entire screen | |
3326 | */ | |
3327 | ||
3328 | lea %pc@(L(console_globals)),%a2 | |
3329 | movel %pc@(L(mac_videobase)),%a1 | |
3330 | movel %pc@(L(mac_rowbytes)),%d5 | |
3331 | movel %pc@(L(mac_dimensions)),%d3 /* -> low byte */ | |
3332 | movel %d3,%d4 | |
3333 | swap %d4 /* -> high byte */ | |
3334 | andl #0xffff,%d3 /* d3 = screen width in pixels */ | |
3335 | andl #0xffff,%d4 /* d4 = screen height in pixels */ | |
3336 | ||
3337 | movel %d5,%d6 | |
3338 | | subl #20,%d6 | |
3339 | mulul %d4,%d6 /* scan line bytes x num scan lines */ | |
3340 | divul #8,%d6 /* we'll clear 8 bytes at a time */ | |
3341 | moveq #-1,%d0 /* Mac_black */ | |
3342 | subq #1,%d6 | |
3343 | ||
3344 | L(console_clear_loop): | |
3345 | movel %d0,%a1@+ | |
3346 | movel %d0,%a1@+ | |
3347 | dbra %d6,L(console_clear_loop) | |
3348 | ||
3349 | /* Calculate font size */ | |
3350 | ||
3351 | #if defined(FONT_8x8) && defined(CONFIG_FONT_8x8) | |
3352 | lea %pc@(font_vga_8x8),%a0 | |
3353 | #elif defined(FONT_8x16) && defined(CONFIG_FONT_8x16) | |
3354 | lea %pc@(font_vga_8x16),%a0 | |
3355 | #elif defined(FONT_6x11) && defined(CONFIG_FONT_6x11) | |
3356 | lea %pc@(font_vga_6x11),%a0 | |
3357 | #elif defined(CONFIG_FONT_8x8) /* default */ | |
3358 | lea %pc@(font_vga_8x8),%a0 | |
3359 | #else /* no compiled-in font */ | |
3360 | lea 0,%a0 | |
3361 | #endif | |
3362 | ||
3363 | /* | |
3364 | * At this point we make a shift in register usage | |
3365 | * a1 = address of console_font pointer | |
3366 | */ | |
3367 | lea %pc@(L(console_font)),%a1 | |
3368 | movel %a0,%a1@ /* store pointer to struct fbcon_font_desc in console_font */ | |
3369 | tstl %a0 | |
3370 | jeq 1f | |
3371 | lea %pc@(L(console_font_data)),%a4 | |
3372 | movel %a0@(FONT_DESC_DATA),%d0 | |
3373 | subl #L(console_font),%a1 | |
3374 | addl %a1,%d0 | |
3375 | movel %d0,%a4@ | |
3376 | ||
3377 | /* | |
3378 | * Calculate global maxs | |
3379 | * Note - we can use either an | |
3380 | * 8 x 16 or 8 x 8 character font | |
3381 | * 6 x 11 also supported | |
3382 | */ | |
3383 | /* ASSERT: a0 = contents of Lconsole_font */ | |
3384 | movel %d3,%d0 /* screen width in pixels */ | |
3385 | divul %a0@(FONT_DESC_WIDTH),%d0 /* d0 = max num chars per row */ | |
3386 | ||
3387 | movel %d4,%d1 /* screen height in pixels */ | |
3388 | divul %a0@(FONT_DESC_HEIGHT),%d1 /* d1 = max num rows */ | |
3389 | ||
3390 | movel %d0,%a2@(Lconsole_struct_num_columns) | |
3391 | movel %d1,%a2@(Lconsole_struct_num_rows) | |
3392 | ||
3393 | /* | |
3394 | * Clear the current row and column | |
3395 | */ | |
3396 | clrl %a2@(Lconsole_struct_cur_column) | |
3397 | clrl %a2@(Lconsole_struct_cur_row) | |
3398 | clrl %a2@(Lconsole_struct_left_edge) | |
3399 | ||
3400 | /* | |
3401 | * Initialization is complete | |
3402 | */ | |
3403 | 1: | |
3404 | func_return console_init | |
3405 | ||
3406 | func_start console_put_stats,%a0/%d7 | |
3407 | /* | |
3408 | * Some of the register usage that follows | |
3409 | * a0 = pointer to boot_info | |
3410 | * d7 = value of boot_info fields | |
3411 | */ | |
3412 | puts "\nMacLinux\n\n" | |
3413 | ||
3414 | #ifdef SERIAL_DEBUG | |
3415 | puts " vidaddr:" | |
3416 | putn %pc@(L(mac_videobase)) /* video addr. */ | |
3417 | ||
3418 | puts "\n _stext:" | |
3419 | lea %pc@(_stext),%a0 | |
3420 | putn %a0 | |
3421 | ||
3422 | puts "\nbootinfo:" | |
3423 | lea %pc@(_end),%a0 | |
3424 | putn %a0 | |
3425 | ||
3426 | puts "\ncpuid:" | |
3427 | putn %pc@(L(cputype)) | |
3428 | putc '\n' | |
3429 | ||
3430 | #ifdef MAC_SERIAL_DEBUG | |
3431 | putn %pc@(L(mac_sccbase)) | |
3432 | putc '\n' | |
3433 | #endif | |
3434 | # if defined(MMU_PRINT) | |
3435 | jbsr mmu_print_machine_cpu_types | |
3436 | # endif /* MMU_PRINT */ | |
3437 | #endif /* SERIAL_DEBUG */ | |
3438 | ||
3439 | func_return console_put_stats | |
3440 | ||
3441 | #ifdef CONSOLE_PENGUIN | |
3442 | func_start console_put_penguin,%a0-%a1/%d0-%d7 | |
3443 | /* | |
3444 | * Get 'that_penguin' onto the screen in the upper right corner | |
3445 | * penguin is 64 x 74 pixels, align against right edge of screen | |
3446 | */ | |
3447 | lea %pc@(L(mac_dimensions)),%a0 | |
3448 | movel %a0@,%d0 | |
3449 | andil #0xffff,%d0 | |
3450 | subil #64,%d0 /* snug up against the right edge */ | |
3451 | clrl %d1 /* start at the top */ | |
3452 | movel #73,%d7 | |
3453 | lea %pc@(L(that_penguin)),%a1 | |
3454 | L(console_penguin_row): | |
3455 | movel #31,%d6 | |
3456 | L(console_penguin_pixel_pair): | |
3457 | moveb %a1@,%d2 | |
3458 | lsrb #4,%d2 | |
3459 | console_plot_pixel %d0,%d1,%d2 | |
3460 | addq #1,%d0 | |
3461 | moveb %a1@+,%d2 | |
3462 | console_plot_pixel %d0,%d1,%d2 | |
3463 | addq #1,%d0 | |
3464 | dbra %d6,L(console_penguin_pixel_pair) | |
3465 | ||
3466 | subil #64,%d0 | |
3467 | addq #1,%d1 | |
3468 | dbra %d7,L(console_penguin_row) | |
3469 | ||
3470 | func_return console_put_penguin | |
3471 | ||
3472 | /* include penguin bitmap */ | |
3473 | L(that_penguin): | |
3474 | #include "../mac/mac_penguin.S" | |
3475 | #endif | |
3476 | ||
3477 | /* | |
3478 | * Calculate source and destination addresses | |
3479 | * output a1 = dest | |
3480 | * a2 = source | |
3481 | */ | |
3482 | ||
3483 | func_start console_scroll,%a0-%a4/%d0-%d7 | |
3484 | lea %pc@(L(mac_videobase)),%a0 | |
3485 | movel %a0@,%a1 | |
3486 | movel %a1,%a2 | |
3487 | lea %pc@(L(mac_rowbytes)),%a0 | |
3488 | movel %a0@,%d5 | |
3489 | movel %pc@(L(console_font)),%a0 | |
3490 | tstl %a0 | |
3491 | jeq 1f | |
3492 | mulul %a0@(FONT_DESC_HEIGHT),%d5 /* account for # scan lines per character */ | |
3493 | addal %d5,%a2 | |
3494 | ||
3495 | /* | |
3496 | * Get dimensions | |
3497 | */ | |
3498 | lea %pc@(L(mac_dimensions)),%a0 | |
3499 | movel %a0@,%d3 | |
3500 | movel %d3,%d4 | |
3501 | swap %d4 | |
3502 | andl #0xffff,%d3 /* d3 = screen width in pixels */ | |
3503 | andl #0xffff,%d4 /* d4 = screen height in pixels */ | |
3504 | ||
3505 | /* | |
3506 | * Calculate number of bytes to move | |
3507 | */ | |
3508 | lea %pc@(L(mac_rowbytes)),%a0 | |
3509 | movel %a0@,%d6 | |
3510 | movel %pc@(L(console_font)),%a0 | |
3511 | subl %a0@(FONT_DESC_HEIGHT),%d4 /* we're not scrolling the top row! */ | |
3512 | mulul %d4,%d6 /* scan line bytes x num scan lines */ | |
3513 | divul #32,%d6 /* we'll move 8 longs at a time */ | |
3514 | subq #1,%d6 | |
3515 | ||
3516 | L(console_scroll_loop): | |
3517 | movel %a2@+,%a1@+ | |
3518 | movel %a2@+,%a1@+ | |
3519 | movel %a2@+,%a1@+ | |
3520 | movel %a2@+,%a1@+ | |
3521 | movel %a2@+,%a1@+ | |
3522 | movel %a2@+,%a1@+ | |
3523 | movel %a2@+,%a1@+ | |
3524 | movel %a2@+,%a1@+ | |
3525 | dbra %d6,L(console_scroll_loop) | |
3526 | ||
3527 | lea %pc@(L(mac_rowbytes)),%a0 | |
3528 | movel %a0@,%d6 | |
3529 | movel %pc@(L(console_font)),%a0 | |
3530 | mulul %a0@(FONT_DESC_HEIGHT),%d6 /* scan line bytes x font height */ | |
3531 | divul #32,%d6 /* we'll move 8 words at a time */ | |
3532 | subq #1,%d6 | |
3533 | ||
3534 | moveq #-1,%d0 | |
3535 | L(console_scroll_clear_loop): | |
3536 | movel %d0,%a1@+ | |
3537 | movel %d0,%a1@+ | |
3538 | movel %d0,%a1@+ | |
3539 | movel %d0,%a1@+ | |
3540 | movel %d0,%a1@+ | |
3541 | movel %d0,%a1@+ | |
3542 | movel %d0,%a1@+ | |
3543 | movel %d0,%a1@+ | |
3544 | dbra %d6,L(console_scroll_clear_loop) | |
3545 | ||
3546 | 1: | |
3547 | func_return console_scroll | |
3548 | ||
3549 | ||
3550 | func_start console_putc,%a0/%a1/%d0-%d7 | |
3551 | ||
3552 | is_not_mac(L(console_exit)) | |
3553 | tstl %pc@(L(console_font)) | |
3554 | jeq L(console_exit) | |
3555 | ||
3556 | /* Output character in d7 on console. | |
3557 | */ | |
3558 | movel ARG1,%d7 | |
3559 | cmpib #'\n',%d7 | |
3560 | jbne 1f | |
3561 | ||
3562 | /* A little safe recursion is good for the soul */ | |
3563 | console_putc #'\r' | |
3564 | 1: | |
3565 | lea %pc@(L(console_globals)),%a0 | |
3566 | ||
3567 | cmpib #10,%d7 | |
3568 | jne L(console_not_lf) | |
3569 | movel %a0@(Lconsole_struct_cur_row),%d0 | |
3570 | addil #1,%d0 | |
3571 | movel %d0,%a0@(Lconsole_struct_cur_row) | |
3572 | movel %a0@(Lconsole_struct_num_rows),%d1 | |
3573 | cmpl %d1,%d0 | |
3574 | jcs 1f | |
3575 | subil #1,%d0 | |
3576 | movel %d0,%a0@(Lconsole_struct_cur_row) | |
3577 | console_scroll | |
3578 | 1: | |
3579 | jra L(console_exit) | |
3580 | ||
3581 | L(console_not_lf): | |
3582 | cmpib #13,%d7 | |
3583 | jne L(console_not_cr) | |
3584 | clrl %a0@(Lconsole_struct_cur_column) | |
3585 | jra L(console_exit) | |
3586 | ||
3587 | L(console_not_cr): | |
3588 | cmpib #1,%d7 | |
3589 | jne L(console_not_home) | |
3590 | clrl %a0@(Lconsole_struct_cur_row) | |
3591 | clrl %a0@(Lconsole_struct_cur_column) | |
3592 | jra L(console_exit) | |
3593 | ||
3594 | /* | |
3595 | * At this point we know that the %d7 character is going to be | |
3596 | * rendered on the screen. Register usage is - | |
3597 | * a0 = pointer to console globals | |
3598 | * a1 = font data | |
3599 | * d0 = cursor column | |
3600 | * d1 = cursor row to draw the character | |
3601 | * d7 = character number | |
3602 | */ | |
3603 | L(console_not_home): | |
3604 | movel %a0@(Lconsole_struct_cur_column),%d0 | |
3605 | addql #1,%a0@(Lconsole_struct_cur_column) | |
3606 | movel %a0@(Lconsole_struct_num_columns),%d1 | |
3607 | cmpl %d1,%d0 | |
3608 | jcs 1f | |
3609 | console_putc #'\n' /* recursion is OK! */ | |
3610 | 1: | |
3611 | movel %a0@(Lconsole_struct_cur_row),%d1 | |
3612 | ||
3613 | /* | |
3614 | * At this point we make a shift in register usage | |
3615 | * a0 = address of pointer to font data (fbcon_font_desc) | |
3616 | */ | |
3617 | movel %pc@(L(console_font)),%a0 | |
3618 | movel %pc@(L(console_font_data)),%a1 /* Load fbcon_font_desc.data into a1 */ | |
3619 | andl #0x000000ff,%d7 | |
3620 | /* ASSERT: a0 = contents of Lconsole_font */ | |
3621 | mulul %a0@(FONT_DESC_HEIGHT),%d7 /* d7 = index into font data */ | |
3622 | addl %d7,%a1 /* a1 = points to char image */ | |
3623 | ||
3624 | /* | |
3625 | * At this point we make a shift in register usage | |
3626 | * d0 = pixel coordinate, x | |
3627 | * d1 = pixel coordinate, y | |
3628 | * d2 = (bit 0) 1/0 for white/black (!) pixel on screen | |
3629 | * d3 = font scan line data (8 pixels) | |
3630 | * d6 = count down for the font's pixel width (8) | |
3631 | * d7 = count down for the font's pixel count in height | |
3632 | */ | |
3633 | /* ASSERT: a0 = contents of Lconsole_font */ | |
3634 | mulul %a0@(FONT_DESC_WIDTH),%d0 | |
3635 | mulul %a0@(FONT_DESC_HEIGHT),%d1 | |
3636 | movel %a0@(FONT_DESC_HEIGHT),%d7 /* Load fbcon_font_desc.height into d7 */ | |
3637 | subq #1,%d7 | |
3638 | L(console_read_char_scanline): | |
3639 | moveb %a1@+,%d3 | |
3640 | ||
3641 | /* ASSERT: a0 = contents of Lconsole_font */ | |
3642 | movel %a0@(FONT_DESC_WIDTH),%d6 /* Load fbcon_font_desc.width into d6 */ | |
3643 | subql #1,%d6 | |
3644 | ||
3645 | L(console_do_font_scanline): | |
3646 | lslb #1,%d3 | |
3647 | scsb %d2 /* convert 1 bit into a byte */ | |
3648 | console_plot_pixel %d0,%d1,%d2 | |
3649 | addq #1,%d0 | |
3650 | dbra %d6,L(console_do_font_scanline) | |
3651 | ||
3652 | /* ASSERT: a0 = contents of Lconsole_font */ | |
3653 | subl %a0@(FONT_DESC_WIDTH),%d0 | |
3654 | addq #1,%d1 | |
3655 | dbra %d7,L(console_read_char_scanline) | |
3656 | ||
3657 | L(console_exit): | |
3658 | func_return console_putc | |
3659 | ||
3660 | /* | |
3661 | * Input: | |
3662 | * d0 = x coordinate | |
3663 | * d1 = y coordinate | |
3664 | * d2 = (bit 0) 1/0 for white/black (!) | |
3665 | * All registers are preserved | |
3666 | */ | |
3667 | func_start console_plot_pixel,%a0-%a1/%d0-%d4 | |
3668 | ||
3669 | movel %pc@(L(mac_videobase)),%a1 | |
3670 | movel %pc@(L(mac_videodepth)),%d3 | |
3671 | movel ARG1,%d0 | |
3672 | movel ARG2,%d1 | |
3673 | mulul %pc@(L(mac_rowbytes)),%d1 | |
3674 | movel ARG3,%d2 | |
3675 | ||
3676 | /* | |
3677 | * Register usage: | |
3678 | * d0 = x coord becomes byte offset into frame buffer | |
3679 | * d1 = y coord | |
3680 | * d2 = black or white (0/1) | |
3681 | * d3 = video depth | |
3682 | * d4 = temp of x (d0) for many bit depths | |
3683 | */ | |
3684 | L(test_1bit): | |
3685 | cmpb #1,%d3 | |
3686 | jbne L(test_2bit) | |
3687 | movel %d0,%d4 /* we need the low order 3 bits! */ | |
3688 | divul #8,%d0 | |
3689 | addal %d0,%a1 | |
3690 | addal %d1,%a1 | |
3691 | andb #7,%d4 | |
3692 | eorb #7,%d4 /* reverse the x-coordinate w/ screen-bit # */ | |
3693 | andb #1,%d2 | |
3694 | jbne L(white_1) | |
3695 | bsetb %d4,%a1@ | |
3696 | jbra L(console_plot_pixel_exit) | |
3697 | L(white_1): | |
3698 | bclrb %d4,%a1@ | |
3699 | jbra L(console_plot_pixel_exit) | |
3700 | ||
3701 | L(test_2bit): | |
3702 | cmpb #2,%d3 | |
3703 | jbne L(test_4bit) | |
3704 | movel %d0,%d4 /* we need the low order 2 bits! */ | |
3705 | divul #4,%d0 | |
3706 | addal %d0,%a1 | |
3707 | addal %d1,%a1 | |
3708 | andb #3,%d4 | |
3709 | eorb #3,%d4 /* reverse the x-coordinate w/ screen-bit # */ | |
3710 | lsll #1,%d4 /* ! */ | |
3711 | andb #1,%d2 | |
3712 | jbne L(white_2) | |
3713 | bsetb %d4,%a1@ | |
3714 | addq #1,%d4 | |
3715 | bsetb %d4,%a1@ | |
3716 | jbra L(console_plot_pixel_exit) | |
3717 | L(white_2): | |
3718 | bclrb %d4,%a1@ | |
3719 | addq #1,%d4 | |
3720 | bclrb %d4,%a1@ | |
3721 | jbra L(console_plot_pixel_exit) | |
3722 | ||
3723 | L(test_4bit): | |
3724 | cmpb #4,%d3 | |
3725 | jbne L(test_8bit) | |
3726 | movel %d0,%d4 /* we need the low order bit! */ | |
3727 | divul #2,%d0 | |
3728 | addal %d0,%a1 | |
3729 | addal %d1,%a1 | |
3730 | andb #1,%d4 | |
3731 | eorb #1,%d4 | |
3732 | lsll #2,%d4 /* ! */ | |
3733 | andb #1,%d2 | |
3734 | jbne L(white_4) | |
3735 | bsetb %d4,%a1@ | |
3736 | addq #1,%d4 | |
3737 | bsetb %d4,%a1@ | |
3738 | addq #1,%d4 | |
3739 | bsetb %d4,%a1@ | |
3740 | addq #1,%d4 | |
3741 | bsetb %d4,%a1@ | |
3742 | jbra L(console_plot_pixel_exit) | |
3743 | L(white_4): | |
3744 | bclrb %d4,%a1@ | |
3745 | addq #1,%d4 | |
3746 | bclrb %d4,%a1@ | |
3747 | addq #1,%d4 | |
3748 | bclrb %d4,%a1@ | |
3749 | addq #1,%d4 | |
3750 | bclrb %d4,%a1@ | |
3751 | jbra L(console_plot_pixel_exit) | |
3752 | ||
3753 | L(test_8bit): | |
3754 | cmpb #8,%d3 | |
3755 | jbne L(test_16bit) | |
3756 | addal %d0,%a1 | |
3757 | addal %d1,%a1 | |
3758 | andb #1,%d2 | |
3759 | jbne L(white_8) | |
3760 | moveb #0xff,%a1@ | |
3761 | jbra L(console_plot_pixel_exit) | |
3762 | L(white_8): | |
3763 | clrb %a1@ | |
3764 | jbra L(console_plot_pixel_exit) | |
3765 | ||
3766 | L(test_16bit): | |
3767 | cmpb #16,%d3 | |
3768 | jbne L(console_plot_pixel_exit) | |
3769 | addal %d0,%a1 | |
3770 | addal %d0,%a1 | |
3771 | addal %d1,%a1 | |
3772 | andb #1,%d2 | |
3773 | jbne L(white_16) | |
3774 | clrw %a1@ | |
3775 | jbra L(console_plot_pixel_exit) | |
3776 | L(white_16): | |
3777 | movew #0x0fff,%a1@ | |
3778 | jbra L(console_plot_pixel_exit) | |
3779 | ||
3780 | L(console_plot_pixel_exit): | |
3781 | func_return console_plot_pixel | |
3782 | #endif /* CONSOLE */ | |
3783 | ||
3784 | #if 0 | |
3785 | /* | |
3786 | * This is some old code lying around. I don't believe | |
3787 | * it's used or important anymore. My guess is it contributed | |
3788 | * to getting to this point, but it's done for now. | |
3789 | * It was still in the 2.1.77 head.S, so it's still here. | |
3790 | * (And still not used!) | |
3791 | */ | |
3792 | L(showtest): | |
3793 | moveml %a0/%d7,%sp@- | |
3794 | puts "A=" | |
3795 | putn %a1 | |
3796 | ||
3797 | .long 0xf0119f15 | ptestr #5,%a1@,#7,%a0 | |
3798 | ||
3799 | puts "DA=" | |
3800 | putn %a0 | |
3801 | ||
3802 | puts "D=" | |
3803 | putn %a0@ | |
3804 | ||
3805 | puts "S=" | |
3806 | lea %pc@(L(mmu)),%a0 | |
3807 | .long 0xf0106200 | pmove %psr,%a0@ | |
3808 | clrl %d7 | |
3809 | movew %a0@,%d7 | |
3810 | putn %d7 | |
3811 | ||
3812 | putc '\n' | |
3813 | moveml %sp@+,%a0/%d7 | |
3814 | rts | |
3815 | #endif /* 0 */ | |
3816 | ||
3817 | __INITDATA | |
3818 | .align 4 | |
3819 | ||
3820 | #if defined(CONFIG_ATARI) || defined(CONFIG_AMIGA) || \ | |
3821 | defined(CONFIG_HP300) || defined(CONFIG_APOLLO) | |
3822 | L(custom): | |
3823 | L(iobase): | |
3824 | .long 0 | |
3825 | #endif | |
3826 | ||
3827 | #if defined(CONSOLE) | |
3828 | L(console_globals): | |
3829 | .long 0 /* cursor column */ | |
3830 | .long 0 /* cursor row */ | |
3831 | .long 0 /* max num columns */ | |
3832 | .long 0 /* max num rows */ | |
3833 | .long 0 /* left edge */ | |
3834 | .long 0 /* mac putc */ | |
3835 | L(console_font): | |
3836 | .long 0 /* pointer to console font (struct font_desc) */ | |
3837 | L(console_font_data): | |
3838 | .long 0 /* pointer to console font data */ | |
3839 | #endif /* CONSOLE */ | |
3840 | ||
3841 | #if defined(MMU_PRINT) | |
3842 | L(mmu_print_data): | |
3843 | .long 0 /* valid flag */ | |
3844 | .long 0 /* start logical */ | |
3845 | .long 0 /* next logical */ | |
3846 | .long 0 /* start physical */ | |
3847 | .long 0 /* next physical */ | |
3848 | #endif /* MMU_PRINT */ | |
3849 | ||
3850 | L(cputype): | |
3851 | .long 0 | |
3852 | L(mmu_cached_pointer_tables): | |
3853 | .long 0 | |
3854 | L(mmu_num_pointer_tables): | |
3855 | .long 0 | |
3856 | L(phys_kernel_start): | |
3857 | .long 0 | |
3858 | L(kernel_end): | |
3859 | .long 0 | |
3860 | L(memory_start): | |
3861 | .long 0 | |
3862 | L(kernel_pgdir_ptr): | |
3863 | .long 0 | |
3864 | L(temp_mmap_mem): | |
3865 | .long 0 | |
3866 | ||
3867 | #if defined (CONFIG_MVME147) | |
3868 | M147_SCC_CTRL_A = 0xfffe3002 | |
3869 | M147_SCC_DATA_A = 0xfffe3003 | |
3870 | #endif | |
3871 | ||
3872 | #if defined (CONFIG_MVME16x) | |
3873 | M162_SCC_CTRL_A = 0xfff45005 | |
3874 | M167_CYCAR = 0xfff450ee | |
3875 | M167_CYIER = 0xfff45011 | |
3876 | M167_CYLICR = 0xfff45026 | |
3877 | M167_CYTEOIR = 0xfff45085 | |
3878 | M167_CYTDR = 0xfff450f8 | |
3879 | M167_PCSCCTICR = 0xfff4201e | |
3880 | M167_PCTPIACKR = 0xfff42025 | |
3881 | #endif | |
3882 | ||
3883 | #if defined (CONFIG_BVME6000) | |
3884 | BVME_SCC_CTRL_A = 0xffb0000b | |
3885 | BVME_SCC_DATA_A = 0xffb0000f | |
3886 | #endif | |
3887 | ||
3888 | #if defined(CONFIG_MAC) | |
3889 | L(mac_booter_data): | |
3890 | .long 0 | |
3891 | L(mac_videobase): | |
3892 | .long 0 | |
3893 | L(mac_videodepth): | |
3894 | .long 0 | |
3895 | L(mac_dimensions): | |
3896 | .long 0 | |
3897 | L(mac_rowbytes): | |
3898 | .long 0 | |
3899 | #ifdef MAC_SERIAL_DEBUG | |
3900 | L(mac_sccbase): | |
3901 | .long 0 | |
3902 | #endif /* MAC_SERIAL_DEBUG */ | |
3903 | #endif | |
3904 | ||
3905 | #if defined (CONFIG_APOLLO) | |
3906 | LSRB0 = 0x10412 | |
3907 | LTHRB0 = 0x10416 | |
3908 | LCPUCTRL = 0x10100 | |
3909 | #endif | |
3910 | ||
3911 | #if defined(CONFIG_HP300) | |
3912 | DCADATA = 0x11 | |
3913 | DCALSR = 0x1b | |
3914 | APCIDATA = 0x00 | |
3915 | APCILSR = 0x14 | |
3916 | L(uartbase): | |
3917 | .long 0 | |
3918 | L(uart_scode): | |
3919 | .long -1 | |
3920 | #endif | |
3921 | ||
3922 | __FINIT | |
3923 | .data | |
3924 | .align 4 | |
3925 | ||
3926 | availmem: | |
3927 | .long 0 | |
3928 | m68k_pgtable_cachemode: | |
3929 | .long 0 | |
3930 | m68k_supervisor_cachemode: | |
3931 | .long 0 | |
3932 | #if defined(CONFIG_MVME16x) | |
3933 | mvme_bdid: | |
3934 | .long 0,0,0,0,0,0,0,0 | |
3935 | #endif | |
3936 | #if defined(CONFIG_Q40) | |
3937 | q40_mem_cptr: | |
3938 | .long 0 | |
3939 | L(q40_do_debug): | |
3940 | .long 0 | |
3941 | #endif |