Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/m68k/atari/config.c | |
3 | * | |
4 | * Copyright (C) 1994 Bjoern Brauel | |
5 | * | |
6 | * 5/2/94 Roman Hodek: | |
7 | * Added setting of time_adj to get a better clock. | |
8 | * | |
9 | * 5/14/94 Roman Hodek: | |
10 | * gettod() for TT | |
11 | * | |
12 | * 5/15/94 Roman Hodek: | |
13 | * hard_reset_now() for Atari (and others?) | |
14 | * | |
15 | * 94/12/30 Andreas Schwab: | |
16 | * atari_sched_init fixed to get precise clock. | |
17 | * | |
18 | * This file is subject to the terms and conditions of the GNU General Public | |
19 | * License. See the file COPYING in the main directory of this archive | |
20 | * for more details. | |
21 | */ | |
22 | ||
23 | /* | |
24 | * Miscellaneous atari stuff | |
25 | */ | |
26 | ||
27 | #include <linux/config.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/mm.h> | |
30 | #include <linux/console.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/ioport.h> | |
34 | #include <linux/vt_kern.h> | |
35 | ||
36 | #include <asm/bootinfo.h> | |
37 | #include <asm/setup.h> | |
38 | #include <asm/atarihw.h> | |
39 | #include <asm/atariints.h> | |
40 | #include <asm/atari_stram.h> | |
41 | #include <asm/system.h> | |
42 | #include <asm/machdep.h> | |
43 | #include <asm/hwtest.h> | |
44 | #include <asm/io.h> | |
45 | ||
46 | u_long atari_mch_cookie; | |
47 | u_long atari_mch_type; | |
48 | struct atari_hw_present atari_hw_present; | |
49 | u_long atari_switches; | |
50 | int atari_dont_touch_floppy_select; | |
51 | int atari_rtc_year_offset; | |
52 | ||
53 | /* local function prototypes */ | |
54 | static void atari_reset( void ); | |
55 | #ifdef CONFIG_ATARI_FLOPPY | |
56 | extern void atari_floppy_setup(char *, int *); | |
57 | #endif | |
58 | static void atari_get_model(char *model); | |
59 | static int atari_get_hardware_list(char *buffer); | |
60 | ||
61 | /* atari specific irq functions */ | |
62 | extern void atari_init_IRQ (void); | |
63 | extern int atari_request_irq (unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), | |
64 | unsigned long flags, const char *devname, void *dev_id); | |
65 | extern void atari_free_irq (unsigned int irq, void *dev_id); | |
66 | extern void atari_enable_irq (unsigned int); | |
67 | extern void atari_disable_irq (unsigned int); | |
68 | extern int show_atari_interrupts (struct seq_file *, void *); | |
69 | extern void atari_mksound( unsigned int count, unsigned int ticks ); | |
70 | #ifdef CONFIG_HEARTBEAT | |
71 | static void atari_heartbeat( int on ); | |
72 | #endif | |
73 | ||
74 | /* atari specific timer functions (in time.c) */ | |
75 | extern void atari_sched_init(irqreturn_t (*)(int, void *, struct pt_regs *)); | |
76 | extern unsigned long atari_gettimeoffset (void); | |
77 | extern int atari_mste_hwclk (int, struct rtc_time *); | |
78 | extern int atari_tt_hwclk (int, struct rtc_time *); | |
79 | extern int atari_mste_set_clock_mmss (unsigned long); | |
80 | extern int atari_tt_set_clock_mmss (unsigned long); | |
81 | ||
82 | /* atari specific debug functions (in debug.c) */ | |
83 | extern void atari_debug_init(void); | |
84 | ||
85 | ||
86 | /* I've moved hwreg_present() and hwreg_present_bywrite() out into | |
87 | * mm/hwtest.c, to avoid having multiple copies of the same routine | |
88 | * in the kernel [I wanted them in hp300 and they were already used | |
89 | * in the nubus code. NB: I don't have an Atari so this might (just | |
90 | * conceivably) break something. | |
91 | * I've preserved the #if 0 version of hwreg_present_bywrite() here | |
92 | * for posterity. | |
93 | * -- Peter Maydell <pmaydell@chiark.greenend.org.uk>, 05/1998 | |
94 | */ | |
95 | ||
96 | #if 0 | |
97 | static int __init | |
98 | hwreg_present_bywrite(volatile void *regp, unsigned char val) | |
99 | { | |
100 | int ret; | |
101 | long save_sp, save_vbr; | |
102 | static long tmp_vectors[3] = { [2] = (long)&&after_test }; | |
103 | ||
104 | __asm__ __volatile__ | |
105 | ( "movec %/vbr,%2\n\t" /* save vbr value */ | |
106 | "movec %4,%/vbr\n\t" /* set up temporary vectors */ | |
107 | "movel %/sp,%1\n\t" /* save sp */ | |
108 | "moveq #0,%0\n\t" /* assume not present */ | |
109 | "moveb %5,%3@\n\t" /* write the hardware reg */ | |
110 | "cmpb %3@,%5\n\t" /* compare it */ | |
111 | "seq %0" /* comes here only if reg */ | |
112 | /* is present */ | |
113 | : "=d&" (ret), "=r&" (save_sp), "=r&" (save_vbr) | |
114 | : "a" (regp), "r" (tmp_vectors), "d" (val) | |
115 | ); | |
116 | after_test: | |
117 | __asm__ __volatile__ | |
118 | ( "movel %0,%/sp\n\t" /* restore sp */ | |
119 | "movec %1,%/vbr" /* restore vbr */ | |
120 | : : "r" (save_sp), "r" (save_vbr) : "sp" | |
121 | ); | |
122 | ||
123 | return( ret ); | |
124 | } | |
125 | #endif | |
126 | ||
127 | ||
128 | /* ++roman: This is a more elaborate test for an SCC chip, since the plain | |
129 | * Medusa board generates DTACK at the SCC's standard addresses, but a SCC | |
130 | * board in the Medusa is possible. Also, the addresses where the ST_ESCC | |
131 | * resides generate DTACK without the chip, too. | |
132 | * The method is to write values into the interrupt vector register, that | |
133 | * should be readable without trouble (from channel A!). | |
134 | */ | |
135 | ||
136 | static int __init scc_test( volatile char *ctla ) | |
137 | { | |
138 | if (!hwreg_present( ctla )) | |
139 | return( 0 ); | |
140 | MFPDELAY(); | |
141 | ||
142 | *ctla = 2; MFPDELAY(); | |
143 | *ctla = 0x40; MFPDELAY(); | |
144 | ||
145 | *ctla = 2; MFPDELAY(); | |
146 | if (*ctla != 0x40) return( 0 ); | |
147 | MFPDELAY(); | |
148 | ||
149 | *ctla = 2; MFPDELAY(); | |
150 | *ctla = 0x60; MFPDELAY(); | |
151 | ||
152 | *ctla = 2; MFPDELAY(); | |
153 | if (*ctla != 0x60) return( 0 ); | |
154 | ||
155 | return( 1 ); | |
156 | } | |
157 | ||
158 | ||
159 | /* | |
160 | * Parse an Atari-specific record in the bootinfo | |
161 | */ | |
162 | ||
163 | int __init atari_parse_bootinfo(const struct bi_record *record) | |
164 | { | |
165 | int unknown = 0; | |
166 | const u_long *data = record->data; | |
167 | ||
168 | switch (record->tag) { | |
169 | case BI_ATARI_MCH_COOKIE: | |
170 | atari_mch_cookie = *data; | |
171 | break; | |
172 | case BI_ATARI_MCH_TYPE: | |
173 | atari_mch_type = *data; | |
174 | break; | |
175 | default: | |
176 | unknown = 1; | |
177 | } | |
178 | return(unknown); | |
179 | } | |
180 | ||
181 | ||
182 | /* Parse the Atari-specific switches= option. */ | |
183 | void __init atari_switches_setup( const char *str, unsigned len ) | |
184 | { | |
185 | char switches[len+1]; | |
186 | char *p; | |
187 | int ovsc_shift; | |
188 | char *args = switches; | |
189 | ||
190 | /* copy string to local array, strsep works destructively... */ | |
191 | strlcpy( switches, str, sizeof(switches) ); | |
192 | atari_switches = 0; | |
193 | ||
194 | /* parse the options */ | |
195 | while ((p = strsep(&args, ",")) != NULL) { | |
196 | if (!*p) continue; | |
197 | ovsc_shift = 0; | |
198 | if (strncmp( p, "ov_", 3 ) == 0) { | |
199 | p += 3; | |
200 | ovsc_shift = ATARI_SWITCH_OVSC_SHIFT; | |
201 | } | |
202 | ||
203 | if (strcmp( p, "ikbd" ) == 0) { | |
204 | /* RTS line of IKBD ACIA */ | |
205 | atari_switches |= ATARI_SWITCH_IKBD << ovsc_shift; | |
206 | } | |
207 | else if (strcmp( p, "midi" ) == 0) { | |
208 | /* RTS line of MIDI ACIA */ | |
209 | atari_switches |= ATARI_SWITCH_MIDI << ovsc_shift; | |
210 | } | |
211 | else if (strcmp( p, "snd6" ) == 0) { | |
212 | atari_switches |= ATARI_SWITCH_SND6 << ovsc_shift; | |
213 | } | |
214 | else if (strcmp( p, "snd7" ) == 0) { | |
215 | atari_switches |= ATARI_SWITCH_SND7 << ovsc_shift; | |
216 | } | |
217 | } | |
218 | } | |
219 | ||
220 | ||
221 | /* | |
222 | * Setup the Atari configuration info | |
223 | */ | |
224 | ||
225 | void __init config_atari(void) | |
226 | { | |
227 | unsigned short tos_version; | |
228 | ||
229 | memset(&atari_hw_present, 0, sizeof(atari_hw_present)); | |
230 | ||
231 | atari_debug_init(); | |
232 | ||
233 | ioport_resource.end = 0xFFFFFFFF; /* Change size of I/O space from 64KB | |
234 | to 4GB. */ | |
235 | ||
236 | mach_sched_init = atari_sched_init; | |
237 | mach_init_IRQ = atari_init_IRQ; | |
238 | mach_request_irq = atari_request_irq; | |
239 | mach_free_irq = atari_free_irq; | |
240 | enable_irq = atari_enable_irq; | |
241 | disable_irq = atari_disable_irq; | |
242 | mach_get_model = atari_get_model; | |
243 | mach_get_hardware_list = atari_get_hardware_list; | |
244 | mach_get_irq_list = show_atari_interrupts; | |
245 | mach_gettimeoffset = atari_gettimeoffset; | |
246 | mach_reset = atari_reset; | |
247 | #ifdef CONFIG_ATARI_FLOPPY | |
248 | mach_floppy_setup = atari_floppy_setup; | |
249 | #endif | |
250 | #ifdef CONFIG_DUMMY_CONSOLE | |
251 | conswitchp = &dummy_con; | |
252 | #endif | |
253 | mach_max_dma_address = 0xffffff; | |
254 | #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) | |
255 | mach_beep = atari_mksound; | |
256 | #endif | |
257 | #ifdef CONFIG_HEARTBEAT | |
258 | mach_heartbeat = atari_heartbeat; | |
259 | #endif | |
260 | ||
261 | /* Set switches as requested by the user */ | |
262 | if (atari_switches & ATARI_SWITCH_IKBD) | |
263 | acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID; | |
264 | if (atari_switches & ATARI_SWITCH_MIDI) | |
265 | acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID; | |
266 | if (atari_switches & (ATARI_SWITCH_SND6|ATARI_SWITCH_SND7)) { | |
267 | sound_ym.rd_data_reg_sel = 14; | |
268 | sound_ym.wd_data = sound_ym.rd_data_reg_sel | | |
269 | ((atari_switches&ATARI_SWITCH_SND6) ? 0x40 : 0) | | |
270 | ((atari_switches&ATARI_SWITCH_SND7) ? 0x80 : 0); | |
271 | } | |
272 | ||
273 | /* ++bjoern: | |
274 | * Determine hardware present | |
275 | */ | |
276 | ||
277 | printk( "Atari hardware found: " ); | |
278 | if (MACH_IS_MEDUSA || MACH_IS_HADES) { | |
279 | /* There's no Atari video hardware on the Medusa, but all the | |
280 | * addresses below generate a DTACK so no bus error occurs! */ | |
281 | } | |
282 | else if (hwreg_present( f030_xreg )) { | |
283 | ATARIHW_SET(VIDEL_SHIFTER); | |
284 | printk( "VIDEL " ); | |
285 | /* This is a temporary hack: If there is Falcon video | |
286 | * hardware, we assume that the ST-DMA serves SCSI instead of | |
287 | * ACSI. In the future, there should be a better method for | |
288 | * this... | |
289 | */ | |
290 | ATARIHW_SET(ST_SCSI); | |
291 | printk( "STDMA-SCSI " ); | |
292 | } | |
293 | else if (hwreg_present( tt_palette )) { | |
294 | ATARIHW_SET(TT_SHIFTER); | |
295 | printk( "TT_SHIFTER " ); | |
296 | } | |
297 | else if (hwreg_present( &shifter.bas_hi )) { | |
298 | if (hwreg_present( &shifter.bas_lo ) && | |
299 | (shifter.bas_lo = 0x0aau, shifter.bas_lo == 0x0aau)) { | |
300 | ATARIHW_SET(EXTD_SHIFTER); | |
301 | printk( "EXTD_SHIFTER " ); | |
302 | } | |
303 | else { | |
304 | ATARIHW_SET(STND_SHIFTER); | |
305 | printk( "STND_SHIFTER " ); | |
306 | } | |
307 | } | |
308 | if (hwreg_present( &mfp.par_dt_reg )) { | |
309 | ATARIHW_SET(ST_MFP); | |
310 | printk( "ST_MFP " ); | |
311 | } | |
312 | if (hwreg_present( &tt_mfp.par_dt_reg )) { | |
313 | ATARIHW_SET(TT_MFP); | |
314 | printk( "TT_MFP " ); | |
315 | } | |
316 | if (hwreg_present( &tt_scsi_dma.dma_addr_hi )) { | |
317 | ATARIHW_SET(SCSI_DMA); | |
318 | printk( "TT_SCSI_DMA " ); | |
319 | } | |
320 | if (!MACH_IS_HADES && hwreg_present( &st_dma.dma_hi )) { | |
321 | ATARIHW_SET(STND_DMA); | |
322 | printk( "STND_DMA " ); | |
323 | } | |
324 | if (MACH_IS_MEDUSA || /* The ST-DMA address registers aren't readable | |
325 | * on all Medusas, so the test below may fail */ | |
326 | (hwreg_present( &st_dma.dma_vhi ) && | |
327 | (st_dma.dma_vhi = 0x55) && (st_dma.dma_hi = 0xaa) && | |
328 | st_dma.dma_vhi == 0x55 && st_dma.dma_hi == 0xaa && | |
329 | (st_dma.dma_vhi = 0xaa) && (st_dma.dma_hi = 0x55) && | |
330 | st_dma.dma_vhi == 0xaa && st_dma.dma_hi == 0x55)) { | |
331 | ATARIHW_SET(EXTD_DMA); | |
332 | printk( "EXTD_DMA " ); | |
333 | } | |
334 | if (hwreg_present( &tt_scsi.scsi_data )) { | |
335 | ATARIHW_SET(TT_SCSI); | |
336 | printk( "TT_SCSI " ); | |
337 | } | |
338 | if (hwreg_present( &sound_ym.rd_data_reg_sel )) { | |
339 | ATARIHW_SET(YM_2149); | |
340 | printk( "YM2149 " ); | |
341 | } | |
342 | if (!MACH_IS_MEDUSA && !MACH_IS_HADES && | |
343 | hwreg_present( &tt_dmasnd.ctrl )) { | |
344 | ATARIHW_SET(PCM_8BIT); | |
345 | printk( "PCM " ); | |
346 | } | |
347 | if (!MACH_IS_HADES && hwreg_present( &falcon_codec.unused5 )) { | |
348 | ATARIHW_SET(CODEC); | |
349 | printk( "CODEC " ); | |
350 | } | |
351 | if (hwreg_present( &dsp56k_host_interface.icr )) { | |
352 | ATARIHW_SET(DSP56K); | |
353 | printk( "DSP56K " ); | |
354 | } | |
355 | if (hwreg_present( &tt_scc_dma.dma_ctrl ) && | |
356 | #if 0 | |
357 | /* This test sucks! Who knows some better? */ | |
358 | (tt_scc_dma.dma_ctrl = 0x01, (tt_scc_dma.dma_ctrl & 1) == 1) && | |
359 | (tt_scc_dma.dma_ctrl = 0x00, (tt_scc_dma.dma_ctrl & 1) == 0) | |
360 | #else | |
361 | !MACH_IS_MEDUSA && !MACH_IS_HADES | |
362 | #endif | |
363 | ) { | |
364 | ATARIHW_SET(SCC_DMA); | |
365 | printk( "SCC_DMA " ); | |
366 | } | |
367 | if (scc_test( &scc.cha_a_ctrl )) { | |
368 | ATARIHW_SET(SCC); | |
369 | printk( "SCC " ); | |
370 | } | |
371 | if (scc_test( &st_escc.cha_b_ctrl )) { | |
372 | ATARIHW_SET( ST_ESCC ); | |
373 | printk( "ST_ESCC " ); | |
374 | } | |
375 | if (MACH_IS_HADES) | |
376 | { | |
377 | ATARIHW_SET( VME ); | |
378 | printk( "VME " ); | |
379 | } | |
380 | else if (hwreg_present( &tt_scu.sys_mask )) { | |
381 | ATARIHW_SET(SCU); | |
382 | /* Assume a VME bus if there's a SCU */ | |
383 | ATARIHW_SET( VME ); | |
384 | printk( "VME SCU " ); | |
385 | } | |
386 | if (hwreg_present( (void *)(0xffff9210) )) { | |
387 | ATARIHW_SET(ANALOG_JOY); | |
388 | printk( "ANALOG_JOY " ); | |
389 | } | |
390 | if (!MACH_IS_HADES && hwreg_present( blitter.halftone )) { | |
391 | ATARIHW_SET(BLITTER); | |
392 | printk( "BLITTER " ); | |
393 | } | |
394 | if (hwreg_present((void *)0xfff00039)) { | |
395 | ATARIHW_SET(IDE); | |
396 | printk( "IDE " ); | |
397 | } | |
398 | #if 1 /* This maybe wrong */ | |
399 | if (!MACH_IS_MEDUSA && !MACH_IS_HADES && | |
400 | hwreg_present( &tt_microwire.data ) && | |
401 | hwreg_present( &tt_microwire.mask ) && | |
402 | (tt_microwire.mask = 0x7ff, | |
403 | udelay(1), | |
404 | tt_microwire.data = MW_LM1992_PSG_HIGH | MW_LM1992_ADDR, | |
405 | udelay(1), | |
406 | tt_microwire.data != 0)) { | |
407 | ATARIHW_SET(MICROWIRE); | |
408 | while (tt_microwire.mask != 0x7ff) ; | |
409 | printk( "MICROWIRE " ); | |
410 | } | |
411 | #endif | |
412 | if (hwreg_present( &tt_rtc.regsel )) { | |
413 | ATARIHW_SET(TT_CLK); | |
414 | printk( "TT_CLK " ); | |
415 | mach_hwclk = atari_tt_hwclk; | |
416 | mach_set_clock_mmss = atari_tt_set_clock_mmss; | |
417 | } | |
418 | if (!MACH_IS_HADES && hwreg_present( &mste_rtc.sec_ones)) { | |
419 | ATARIHW_SET(MSTE_CLK); | |
420 | printk( "MSTE_CLK "); | |
421 | mach_hwclk = atari_mste_hwclk; | |
422 | mach_set_clock_mmss = atari_mste_set_clock_mmss; | |
423 | } | |
424 | if (!MACH_IS_MEDUSA && !MACH_IS_HADES && | |
425 | hwreg_present( &dma_wd.fdc_speed ) && | |
426 | hwreg_write( &dma_wd.fdc_speed, 0 )) { | |
427 | ATARIHW_SET(FDCSPEED); | |
428 | printk( "FDC_SPEED "); | |
429 | } | |
430 | if (!MACH_IS_HADES && !ATARIHW_PRESENT(ST_SCSI)) { | |
431 | ATARIHW_SET(ACSI); | |
432 | printk( "ACSI " ); | |
433 | } | |
434 | printk("\n"); | |
435 | ||
436 | if (CPU_IS_040_OR_060) | |
437 | /* Now it seems to be safe to turn of the tt0 transparent | |
438 | * translation (the one that must not be turned off in | |
439 | * head.S...) | |
440 | */ | |
441 | __asm__ volatile ("moveq #0,%/d0\n\t" | |
442 | ".chip 68040\n\t" | |
443 | "movec %%d0,%%itt0\n\t" | |
444 | "movec %%d0,%%dtt0\n\t" | |
445 | ".chip 68k" | |
446 | : /* no outputs */ | |
447 | : /* no inputs */ | |
448 | : "d0"); | |
449 | ||
450 | /* allocator for memory that must reside in st-ram */ | |
451 | atari_stram_init (); | |
452 | ||
453 | /* Set up a mapping for the VMEbus address region: | |
454 | * | |
455 | * VME is either at phys. 0xfexxxxxx (TT) or 0xa00000..0xdfffff | |
456 | * (MegaSTE) In both cases, the whole 16 MB chunk is mapped at | |
457 | * 0xfe000000 virt., because this can be done with a single | |
458 | * transparent translation. On the 68040, lots of often unused | |
459 | * page tables would be needed otherwise. On a MegaSTE or similar, | |
460 | * the highest byte is stripped off by hardware due to the 24 bit | |
461 | * design of the bus. | |
462 | */ | |
463 | ||
464 | if (CPU_IS_020_OR_030) { | |
465 | unsigned long tt1_val; | |
466 | tt1_val = 0xfe008543; /* Translate 0xfexxxxxx, enable, cache | |
467 | * inhibit, read and write, FDC mask = 3, | |
468 | * FDC val = 4 -> Supervisor only */ | |
469 | __asm__ __volatile__ ( ".chip 68030\n\t" | |
470 | "pmove %0@,%/tt1\n\t" | |
471 | ".chip 68k" | |
472 | : : "a" (&tt1_val) ); | |
473 | } | |
474 | else { | |
475 | __asm__ __volatile__ | |
476 | ( "movel %0,%/d0\n\t" | |
477 | ".chip 68040\n\t" | |
478 | "movec %%d0,%%itt1\n\t" | |
479 | "movec %%d0,%%dtt1\n\t" | |
480 | ".chip 68k" | |
481 | : | |
482 | : "g" (0xfe00a040) /* Translate 0xfexxxxxx, enable, | |
483 | * supervisor only, non-cacheable/ | |
484 | * serialized, writable */ | |
485 | : "d0" ); | |
486 | ||
487 | } | |
488 | ||
489 | /* Fetch tos version at Physical 2 */ | |
490 | /* We my not be able to access this address if the kernel is | |
491 | loaded to st ram, since the first page is unmapped. On the | |
492 | Medusa this is always the case and there is nothing we can do | |
493 | about this, so we just assume the smaller offset. For the TT | |
494 | we use the fact that in head.S we have set up a mapping | |
495 | 0xFFxxxxxx -> 0x00xxxxxx, so that the first 16MB is accessible | |
496 | in the last 16MB of the address space. */ | |
497 | tos_version = (MACH_IS_MEDUSA || MACH_IS_HADES) ? | |
498 | 0xfff : *(unsigned short *)0xff000002; | |
499 | atari_rtc_year_offset = (tos_version < 0x306) ? 70 : 68; | |
500 | } | |
501 | ||
502 | #ifdef CONFIG_HEARTBEAT | |
503 | static void atari_heartbeat( int on ) | |
504 | { | |
505 | unsigned char tmp; | |
506 | unsigned long flags; | |
507 | ||
508 | if (atari_dont_touch_floppy_select) | |
509 | return; | |
510 | ||
511 | local_irq_save(flags); | |
512 | sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ | |
513 | tmp = sound_ym.rd_data_reg_sel; | |
514 | sound_ym.wd_data = on ? (tmp & ~0x02) : (tmp | 0x02); | |
515 | local_irq_restore(flags); | |
516 | } | |
517 | #endif | |
518 | ||
519 | /* ++roman: | |
520 | * | |
521 | * This function does a reset on machines that lack the ability to | |
522 | * assert the processor's _RESET signal somehow via hardware. It is | |
523 | * based on the fact that you can find the initial SP and PC values | |
524 | * after a reset at physical addresses 0 and 4. This works pretty well | |
525 | * for Atari machines, since the lowest 8 bytes of physical memory are | |
526 | * really ROM (mapped by hardware). For other 680x0 machines: don't | |
527 | * know if it works... | |
528 | * | |
529 | * To get the values at addresses 0 and 4, the MMU better is turned | |
530 | * off first. After that, we have to jump into physical address space | |
531 | * (the PC before the pmove statement points to the virtual address of | |
532 | * the code). Getting that physical address is not hard, but the code | |
533 | * becomes a bit complex since I've tried to ensure that the jump | |
534 | * statement after the pmove is in the cache already (otherwise the | |
535 | * processor can't fetch it!). For that, the code first jumps to the | |
536 | * jump statement with the (virtual) address of the pmove section in | |
537 | * an address register . The jump statement is surely in the cache | |
538 | * now. After that, that physical address of the reset code is loaded | |
539 | * into the same address register, pmove is done and the same jump | |
540 | * statements goes to the reset code. Since there are not many | |
541 | * statements between the two jumps, I hope it stays in the cache. | |
542 | * | |
543 | * The C code makes heavy use of the GCC features that you can get the | |
544 | * address of a C label. No hope to compile this with another compiler | |
545 | * than GCC! | |
546 | */ | |
547 | ||
548 | /* ++andreas: no need for complicated code, just depend on prefetch */ | |
549 | ||
550 | static void atari_reset (void) | |
551 | { | |
552 | long tc_val = 0; | |
553 | long reset_addr; | |
554 | ||
555 | /* On the Medusa, phys. 0x4 may contain garbage because it's no | |
556 | ROM. See above for explanation why we cannot use PTOV(4). */ | |
557 | reset_addr = MACH_IS_HADES ? 0x7fe00030 : | |
558 | MACH_IS_MEDUSA || MACH_IS_AB40 ? 0xe00030 : | |
559 | *(unsigned long *) 0xff000004; | |
560 | ||
561 | /* reset ACIA for switch off OverScan, if it's active */ | |
562 | if (atari_switches & ATARI_SWITCH_OVSC_IKBD) | |
563 | acia.key_ctrl = ACIA_RESET; | |
564 | if (atari_switches & ATARI_SWITCH_OVSC_MIDI) | |
565 | acia.mid_ctrl = ACIA_RESET; | |
566 | ||
567 | /* processor independent: turn off interrupts and reset the VBR; | |
568 | * the caches must be left enabled, else prefetching the final jump | |
569 | * instruction doesn't work. */ | |
570 | local_irq_disable(); | |
571 | __asm__ __volatile__ | |
572 | ("moveq #0,%/d0\n\t" | |
573 | "movec %/d0,%/vbr" | |
574 | : : : "d0" ); | |
575 | ||
576 | if (CPU_IS_040_OR_060) { | |
577 | unsigned long jmp_addr040 = virt_to_phys(&&jmp_addr_label040); | |
578 | if (CPU_IS_060) { | |
579 | /* 68060: clear PCR to turn off superscalar operation */ | |
580 | __asm__ __volatile__ | |
581 | ("moveq #0,%/d0\n\t" | |
582 | ".chip 68060\n\t" | |
583 | "movec %%d0,%%pcr\n\t" | |
584 | ".chip 68k" | |
585 | : : : "d0" ); | |
586 | } | |
587 | ||
588 | __asm__ __volatile__ | |
589 | ("movel %0,%/d0\n\t" | |
590 | "andl #0xff000000,%/d0\n\t" | |
591 | "orw #0xe020,%/d0\n\t" /* map 16 MB, enable, cacheable */ | |
592 | ".chip 68040\n\t" | |
593 | "movec %%d0,%%itt0\n\t" | |
594 | "movec %%d0,%%dtt0\n\t" | |
595 | ".chip 68k\n\t" | |
596 | "jmp %0@\n\t" | |
597 | : /* no outputs */ | |
598 | : "a" (jmp_addr040) | |
599 | : "d0" ); | |
600 | jmp_addr_label040: | |
601 | __asm__ __volatile__ | |
602 | ("moveq #0,%/d0\n\t" | |
603 | "nop\n\t" | |
604 | ".chip 68040\n\t" | |
605 | "cinva %%bc\n\t" | |
606 | "nop\n\t" | |
607 | "pflusha\n\t" | |
608 | "nop\n\t" | |
609 | "movec %%d0,%%tc\n\t" | |
610 | "nop\n\t" | |
611 | /* the following setup of transparent translations is needed on the | |
612 | * Afterburner040 to successfully reboot. Other machines shouldn't | |
613 | * care about a different tt regs setup, they also didn't care in | |
614 | * the past that the regs weren't turned off. */ | |
615 | "movel #0xffc000,%%d0\n\t" /* whole insn space cacheable */ | |
616 | "movec %%d0,%%itt0\n\t" | |
617 | "movec %%d0,%%itt1\n\t" | |
618 | "orw #0x40,%/d0\n\t" /* whole data space non-cacheable/ser. */ | |
619 | "movec %%d0,%%dtt0\n\t" | |
620 | "movec %%d0,%%dtt1\n\t" | |
621 | ".chip 68k\n\t" | |
622 | "jmp %0@" | |
623 | : /* no outputs */ | |
624 | : "a" (reset_addr) | |
625 | : "d0"); | |
626 | } | |
627 | else | |
628 | __asm__ __volatile__ | |
629 | ("pmove %0@,%/tc\n\t" | |
630 | "jmp %1@" | |
631 | : /* no outputs */ | |
632 | : "a" (&tc_val), "a" (reset_addr)); | |
633 | } | |
634 | ||
635 | ||
636 | static void atari_get_model(char *model) | |
637 | { | |
638 | strcpy(model, "Atari "); | |
639 | switch (atari_mch_cookie >> 16) { | |
640 | case ATARI_MCH_ST: | |
641 | if (ATARIHW_PRESENT(MSTE_CLK)) | |
642 | strcat (model, "Mega ST"); | |
643 | else | |
644 | strcat (model, "ST"); | |
645 | break; | |
646 | case ATARI_MCH_STE: | |
647 | if (MACH_IS_MSTE) | |
648 | strcat (model, "Mega STE"); | |
649 | else | |
650 | strcat (model, "STE"); | |
651 | break; | |
652 | case ATARI_MCH_TT: | |
653 | if (MACH_IS_MEDUSA) | |
654 | /* Medusa has TT _MCH cookie */ | |
655 | strcat (model, "Medusa"); | |
656 | else if (MACH_IS_HADES) | |
657 | strcat(model, "Hades"); | |
658 | else | |
659 | strcat (model, "TT"); | |
660 | break; | |
661 | case ATARI_MCH_FALCON: | |
662 | strcat (model, "Falcon"); | |
663 | if (MACH_IS_AB40) | |
664 | strcat (model, " (with Afterburner040)"); | |
665 | break; | |
666 | default: | |
667 | sprintf (model + strlen (model), "(unknown mach cookie 0x%lx)", | |
668 | atari_mch_cookie); | |
669 | break; | |
670 | } | |
671 | } | |
672 | ||
673 | ||
674 | static int atari_get_hardware_list(char *buffer) | |
675 | { | |
676 | int len = 0, i; | |
677 | ||
678 | for (i = 0; i < m68k_num_memory; i++) | |
679 | len += sprintf (buffer+len, "\t%3ld MB at 0x%08lx (%s)\n", | |
680 | m68k_memory[i].size >> 20, m68k_memory[i].addr, | |
681 | (m68k_memory[i].addr & 0xff000000 ? | |
682 | "alternate RAM" : "ST-RAM")); | |
683 | ||
684 | #define ATARIHW_ANNOUNCE(name,str) \ | |
685 | if (ATARIHW_PRESENT(name)) \ | |
686 | len += sprintf (buffer + len, "\t%s\n", str) | |
687 | ||
688 | len += sprintf (buffer + len, "Detected hardware:\n"); | |
689 | ATARIHW_ANNOUNCE(STND_SHIFTER, "ST Shifter"); | |
690 | ATARIHW_ANNOUNCE(EXTD_SHIFTER, "STe Shifter"); | |
691 | ATARIHW_ANNOUNCE(TT_SHIFTER, "TT Shifter"); | |
692 | ATARIHW_ANNOUNCE(VIDEL_SHIFTER, "Falcon Shifter"); | |
693 | ATARIHW_ANNOUNCE(YM_2149, "Programmable Sound Generator"); | |
694 | ATARIHW_ANNOUNCE(PCM_8BIT, "PCM 8 Bit Sound"); | |
695 | ATARIHW_ANNOUNCE(CODEC, "CODEC Sound"); | |
696 | ATARIHW_ANNOUNCE(TT_SCSI, "SCSI Controller NCR5380 (TT style)"); | |
697 | ATARIHW_ANNOUNCE(ST_SCSI, "SCSI Controller NCR5380 (Falcon style)"); | |
698 | ATARIHW_ANNOUNCE(ACSI, "ACSI Interface"); | |
699 | ATARIHW_ANNOUNCE(IDE, "IDE Interface"); | |
700 | ATARIHW_ANNOUNCE(FDCSPEED, "8/16 Mhz Switch for FDC"); | |
701 | ATARIHW_ANNOUNCE(ST_MFP, "Multi Function Peripheral MFP 68901"); | |
702 | ATARIHW_ANNOUNCE(TT_MFP, "Second Multi Function Peripheral MFP 68901"); | |
703 | ATARIHW_ANNOUNCE(SCC, "Serial Communications Controller SCC 8530"); | |
704 | ATARIHW_ANNOUNCE(ST_ESCC, "Extended Serial Communications Controller SCC 85230"); | |
705 | ATARIHW_ANNOUNCE(ANALOG_JOY, "Paddle Interface"); | |
706 | ATARIHW_ANNOUNCE(MICROWIRE, "MICROWIRE(tm) Interface"); | |
707 | ATARIHW_ANNOUNCE(STND_DMA, "DMA Controller (24 bit)"); | |
708 | ATARIHW_ANNOUNCE(EXTD_DMA, "DMA Controller (32 bit)"); | |
709 | ATARIHW_ANNOUNCE(SCSI_DMA, "DMA Controller for NCR5380"); | |
710 | ATARIHW_ANNOUNCE(SCC_DMA, "DMA Controller for SCC"); | |
711 | ATARIHW_ANNOUNCE(TT_CLK, "Clock Chip MC146818A"); | |
712 | ATARIHW_ANNOUNCE(MSTE_CLK, "Clock Chip RP5C15"); | |
713 | ATARIHW_ANNOUNCE(SCU, "System Control Unit"); | |
714 | ATARIHW_ANNOUNCE(BLITTER, "Blitter"); | |
715 | ATARIHW_ANNOUNCE(VME, "VME Bus"); | |
716 | ATARIHW_ANNOUNCE(DSP56K, "DSP56001 processor"); | |
717 | ||
718 | return(len); | |
719 | } | |
720 | ||
721 | /* | |
722 | * Local variables: | |
723 | * c-indent-level: 4 | |
724 | * tab-width: 8 | |
725 | * End: | |
726 | */ |