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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 | ||
1da177e4 LT |
27 | #include <linux/types.h> |
28 | #include <linux/mm.h> | |
29 | #include <linux/console.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/ioport.h> | |
33 | #include <linux/vt_kern.h> | |
a3b2004a | 34 | #include <linux/module.h> |
1da177e4 LT |
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; | |
a3b2004a AB |
47 | EXPORT_SYMBOL(atari_mch_cookie); |
48 | ||
1da177e4 | 49 | u_long atari_mch_type; |
a3b2004a AB |
50 | EXPORT_SYMBOL(atari_mch_type); |
51 | ||
1da177e4 | 52 | struct atari_hw_present atari_hw_present; |
a3b2004a AB |
53 | EXPORT_SYMBOL(atari_hw_present); |
54 | ||
1da177e4 | 55 | u_long atari_switches; |
a3b2004a AB |
56 | EXPORT_SYMBOL(atari_switches); |
57 | ||
1da177e4 | 58 | int atari_dont_touch_floppy_select; |
a3b2004a AB |
59 | EXPORT_SYMBOL(atari_dont_touch_floppy_select); |
60 | ||
1da177e4 LT |
61 | int atari_rtc_year_offset; |
62 | ||
63 | /* local function prototypes */ | |
6ff5801a | 64 | static void atari_reset(void); |
1da177e4 LT |
65 | static void atari_get_model(char *model); |
66 | static int atari_get_hardware_list(char *buffer); | |
67 | ||
68 | /* atari specific irq functions */ | |
69 | extern void atari_init_IRQ (void); | |
6ff5801a | 70 | extern void atari_mksound(unsigned int count, unsigned int ticks); |
1da177e4 | 71 | #ifdef CONFIG_HEARTBEAT |
6ff5801a | 72 | static void atari_heartbeat(int on); |
1da177e4 LT |
73 | #endif |
74 | ||
75 | /* atari specific timer functions (in time.c) */ | |
6ff5801a | 76 | extern void atari_sched_init(irq_handler_t); |
1da177e4 LT |
77 | extern unsigned long atari_gettimeoffset (void); |
78 | extern int atari_mste_hwclk (int, struct rtc_time *); | |
79 | extern int atari_tt_hwclk (int, struct rtc_time *); | |
80 | extern int atari_mste_set_clock_mmss (unsigned long); | |
81 | extern int atari_tt_set_clock_mmss (unsigned long); | |
82 | ||
1da177e4 | 83 | |
1da177e4 LT |
84 | /* ++roman: This is a more elaborate test for an SCC chip, since the plain |
85 | * Medusa board generates DTACK at the SCC's standard addresses, but a SCC | |
86 | * board in the Medusa is possible. Also, the addresses where the ST_ESCC | |
87 | * resides generate DTACK without the chip, too. | |
88 | * The method is to write values into the interrupt vector register, that | |
89 | * should be readable without trouble (from channel A!). | |
90 | */ | |
91 | ||
6ff5801a | 92 | static int __init scc_test(volatile char *ctla) |
1da177e4 | 93 | { |
6ff5801a RZ |
94 | if (!hwreg_present(ctla)) |
95 | return 0; | |
1da177e4 LT |
96 | MFPDELAY(); |
97 | ||
6ff5801a RZ |
98 | *ctla = 2; |
99 | MFPDELAY(); | |
100 | *ctla = 0x40; | |
101 | MFPDELAY(); | |
1da177e4 | 102 | |
6ff5801a RZ |
103 | *ctla = 2; |
104 | MFPDELAY(); | |
105 | if (*ctla != 0x40) | |
106 | return 0; | |
1da177e4 LT |
107 | MFPDELAY(); |
108 | ||
6ff5801a RZ |
109 | *ctla = 2; |
110 | MFPDELAY(); | |
111 | *ctla = 0x60; | |
112 | MFPDELAY(); | |
1da177e4 | 113 | |
6ff5801a RZ |
114 | *ctla = 2; |
115 | MFPDELAY(); | |
116 | if (*ctla != 0x60) | |
117 | return 0; | |
1da177e4 | 118 | |
6ff5801a | 119 | return 1; |
1da177e4 LT |
120 | } |
121 | ||
122 | ||
123 | /* | |
124 | * Parse an Atari-specific record in the bootinfo | |
125 | */ | |
126 | ||
127 | int __init atari_parse_bootinfo(const struct bi_record *record) | |
128 | { | |
6ff5801a RZ |
129 | int unknown = 0; |
130 | const u_long *data = record->data; | |
1da177e4 | 131 | |
6ff5801a | 132 | switch (record->tag) { |
1da177e4 | 133 | case BI_ATARI_MCH_COOKIE: |
6ff5801a RZ |
134 | atari_mch_cookie = *data; |
135 | break; | |
1da177e4 | 136 | case BI_ATARI_MCH_TYPE: |
6ff5801a RZ |
137 | atari_mch_type = *data; |
138 | break; | |
1da177e4 | 139 | default: |
6ff5801a RZ |
140 | unknown = 1; |
141 | break; | |
142 | } | |
143 | return unknown; | |
1da177e4 LT |
144 | } |
145 | ||
146 | ||
147 | /* Parse the Atari-specific switches= option. */ | |
d6713b40 | 148 | static int __init atari_switches_setup(char *str) |
1da177e4 | 149 | { |
d6713b40 | 150 | char switches[strlen(str) + 1]; |
6ff5801a RZ |
151 | char *p; |
152 | int ovsc_shift; | |
153 | char *args = switches; | |
154 | ||
d6713b40 RZ |
155 | if (!MACH_IS_ATARI) |
156 | return 0; | |
157 | ||
6ff5801a | 158 | /* copy string to local array, strsep works destructively... */ |
d6713b40 | 159 | strcpy(switches, str); |
6ff5801a RZ |
160 | atari_switches = 0; |
161 | ||
162 | /* parse the options */ | |
163 | while ((p = strsep(&args, ",")) != NULL) { | |
164 | if (!*p) | |
165 | continue; | |
166 | ovsc_shift = 0; | |
167 | if (strncmp(p, "ov_", 3) == 0) { | |
168 | p += 3; | |
169 | ovsc_shift = ATARI_SWITCH_OVSC_SHIFT; | |
170 | } | |
171 | ||
172 | if (strcmp(p, "ikbd") == 0) { | |
173 | /* RTS line of IKBD ACIA */ | |
174 | atari_switches |= ATARI_SWITCH_IKBD << ovsc_shift; | |
175 | } else if (strcmp(p, "midi") == 0) { | |
176 | /* RTS line of MIDI ACIA */ | |
177 | atari_switches |= ATARI_SWITCH_MIDI << ovsc_shift; | |
178 | } else if (strcmp(p, "snd6") == 0) { | |
179 | atari_switches |= ATARI_SWITCH_SND6 << ovsc_shift; | |
180 | } else if (strcmp(p, "snd7") == 0) { | |
181 | atari_switches |= ATARI_SWITCH_SND7 << ovsc_shift; | |
182 | } | |
1da177e4 | 183 | } |
d6713b40 | 184 | return 0; |
1da177e4 LT |
185 | } |
186 | ||
d6713b40 RZ |
187 | early_param("switches", atari_switches_setup); |
188 | ||
1da177e4 LT |
189 | |
190 | /* | |
191 | * Setup the Atari configuration info | |
192 | */ | |
193 | ||
194 | void __init config_atari(void) | |
195 | { | |
6ff5801a | 196 | unsigned short tos_version; |
1da177e4 | 197 | |
6ff5801a | 198 | memset(&atari_hw_present, 0, sizeof(atari_hw_present)); |
1da177e4 | 199 | |
6ff5801a RZ |
200 | /* Change size of I/O space from 64KB to 4GB. */ |
201 | ioport_resource.end = 0xFFFFFFFF; | |
1da177e4 | 202 | |
6ff5801a RZ |
203 | mach_sched_init = atari_sched_init; |
204 | mach_init_IRQ = atari_init_IRQ; | |
205 | mach_get_model = atari_get_model; | |
206 | mach_get_hardware_list = atari_get_hardware_list; | |
207 | mach_gettimeoffset = atari_gettimeoffset; | |
208 | mach_reset = atari_reset; | |
209 | mach_max_dma_address = 0xffffff; | |
1da177e4 | 210 | #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) |
6ff5801a | 211 | mach_beep = atari_mksound; |
1da177e4 LT |
212 | #endif |
213 | #ifdef CONFIG_HEARTBEAT | |
6ff5801a | 214 | mach_heartbeat = atari_heartbeat; |
1da177e4 LT |
215 | #endif |
216 | ||
6ff5801a RZ |
217 | /* Set switches as requested by the user */ |
218 | if (atari_switches & ATARI_SWITCH_IKBD) | |
219 | acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID; | |
220 | if (atari_switches & ATARI_SWITCH_MIDI) | |
221 | acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID; | |
222 | if (atari_switches & (ATARI_SWITCH_SND6|ATARI_SWITCH_SND7)) { | |
223 | sound_ym.rd_data_reg_sel = 14; | |
224 | sound_ym.wd_data = sound_ym.rd_data_reg_sel | | |
225 | ((atari_switches&ATARI_SWITCH_SND6) ? 0x40 : 0) | | |
226 | ((atari_switches&ATARI_SWITCH_SND7) ? 0x80 : 0); | |
227 | } | |
1da177e4 | 228 | |
6ff5801a RZ |
229 | /* ++bjoern: |
230 | * Determine hardware present | |
231 | */ | |
232 | ||
233 | printk("Atari hardware found: "); | |
234 | if (MACH_IS_MEDUSA || MACH_IS_HADES) { | |
235 | /* There's no Atari video hardware on the Medusa, but all the | |
236 | * addresses below generate a DTACK so no bus error occurs! */ | |
237 | } else if (hwreg_present(f030_xreg)) { | |
238 | ATARIHW_SET(VIDEL_SHIFTER); | |
239 | printk("VIDEL "); | |
240 | /* This is a temporary hack: If there is Falcon video | |
241 | * hardware, we assume that the ST-DMA serves SCSI instead of | |
242 | * ACSI. In the future, there should be a better method for | |
243 | * this... | |
244 | */ | |
245 | ATARIHW_SET(ST_SCSI); | |
246 | printk("STDMA-SCSI "); | |
247 | } else if (hwreg_present(tt_palette)) { | |
248 | ATARIHW_SET(TT_SHIFTER); | |
249 | printk("TT_SHIFTER "); | |
250 | } else if (hwreg_present(&shifter.bas_hi)) { | |
251 | if (hwreg_present(&shifter.bas_lo) && | |
252 | (shifter.bas_lo = 0x0aau, shifter.bas_lo == 0x0aau)) { | |
253 | ATARIHW_SET(EXTD_SHIFTER); | |
254 | printk("EXTD_SHIFTER "); | |
255 | } else { | |
256 | ATARIHW_SET(STND_SHIFTER); | |
257 | printk("STND_SHIFTER "); | |
258 | } | |
259 | } | |
260 | if (hwreg_present(&mfp.par_dt_reg)) { | |
261 | ATARIHW_SET(ST_MFP); | |
262 | printk("ST_MFP "); | |
263 | } | |
264 | if (hwreg_present(&tt_mfp.par_dt_reg)) { | |
265 | ATARIHW_SET(TT_MFP); | |
266 | printk("TT_MFP "); | |
267 | } | |
268 | if (hwreg_present(&tt_scsi_dma.dma_addr_hi)) { | |
269 | ATARIHW_SET(SCSI_DMA); | |
270 | printk("TT_SCSI_DMA "); | |
271 | } | |
272 | if (!MACH_IS_HADES && hwreg_present(&st_dma.dma_hi)) { | |
273 | ATARIHW_SET(STND_DMA); | |
274 | printk("STND_DMA "); | |
275 | } | |
276 | /* | |
277 | * The ST-DMA address registers aren't readable | |
278 | * on all Medusas, so the test below may fail | |
279 | */ | |
280 | if (MACH_IS_MEDUSA || | |
281 | (hwreg_present(&st_dma.dma_vhi) && | |
282 | (st_dma.dma_vhi = 0x55) && (st_dma.dma_hi = 0xaa) && | |
283 | st_dma.dma_vhi == 0x55 && st_dma.dma_hi == 0xaa && | |
284 | (st_dma.dma_vhi = 0xaa) && (st_dma.dma_hi = 0x55) && | |
285 | st_dma.dma_vhi == 0xaa && st_dma.dma_hi == 0x55)) { | |
286 | ATARIHW_SET(EXTD_DMA); | |
287 | printk("EXTD_DMA "); | |
288 | } | |
289 | if (hwreg_present(&tt_scsi.scsi_data)) { | |
290 | ATARIHW_SET(TT_SCSI); | |
291 | printk("TT_SCSI "); | |
292 | } | |
293 | if (hwreg_present(&sound_ym.rd_data_reg_sel)) { | |
294 | ATARIHW_SET(YM_2149); | |
295 | printk("YM2149 "); | |
296 | } | |
297 | if (!MACH_IS_MEDUSA && !MACH_IS_HADES && | |
298 | hwreg_present(&tt_dmasnd.ctrl)) { | |
299 | ATARIHW_SET(PCM_8BIT); | |
300 | printk("PCM "); | |
301 | } | |
302 | if (!MACH_IS_HADES && hwreg_present(&falcon_codec.unused5)) { | |
303 | ATARIHW_SET(CODEC); | |
304 | printk("CODEC "); | |
305 | } | |
306 | if (hwreg_present(&dsp56k_host_interface.icr)) { | |
307 | ATARIHW_SET(DSP56K); | |
308 | printk("DSP56K "); | |
309 | } | |
310 | if (hwreg_present(&tt_scc_dma.dma_ctrl) && | |
1da177e4 | 311 | #if 0 |
6ff5801a RZ |
312 | /* This test sucks! Who knows some better? */ |
313 | (tt_scc_dma.dma_ctrl = 0x01, (tt_scc_dma.dma_ctrl & 1) == 1) && | |
314 | (tt_scc_dma.dma_ctrl = 0x00, (tt_scc_dma.dma_ctrl & 1) == 0) | |
1da177e4 | 315 | #else |
6ff5801a | 316 | !MACH_IS_MEDUSA && !MACH_IS_HADES |
1da177e4 | 317 | #endif |
6ff5801a RZ |
318 | ) { |
319 | ATARIHW_SET(SCC_DMA); | |
320 | printk("SCC_DMA "); | |
321 | } | |
322 | if (scc_test(&scc.cha_a_ctrl)) { | |
323 | ATARIHW_SET(SCC); | |
324 | printk("SCC "); | |
325 | } | |
326 | if (scc_test(&st_escc.cha_b_ctrl)) { | |
327 | ATARIHW_SET(ST_ESCC); | |
328 | printk("ST_ESCC "); | |
329 | } | |
330 | if (MACH_IS_HADES) { | |
331 | ATARIHW_SET(VME); | |
332 | printk("VME "); | |
333 | } else if (hwreg_present(&tt_scu.sys_mask)) { | |
334 | ATARIHW_SET(SCU); | |
335 | /* Assume a VME bus if there's a SCU */ | |
336 | ATARIHW_SET(VME); | |
337 | printk("VME SCU "); | |
338 | } | |
339 | if (hwreg_present((void *)(0xffff9210))) { | |
340 | ATARIHW_SET(ANALOG_JOY); | |
341 | printk("ANALOG_JOY "); | |
342 | } | |
343 | if (!MACH_IS_HADES && hwreg_present(blitter.halftone)) { | |
344 | ATARIHW_SET(BLITTER); | |
345 | printk("BLITTER "); | |
346 | } | |
347 | if (hwreg_present((void *)0xfff00039)) { | |
348 | ATARIHW_SET(IDE); | |
349 | printk("IDE "); | |
350 | } | |
1da177e4 | 351 | #if 1 /* This maybe wrong */ |
6ff5801a RZ |
352 | if (!MACH_IS_MEDUSA && !MACH_IS_HADES && |
353 | hwreg_present(&tt_microwire.data) && | |
354 | hwreg_present(&tt_microwire.mask) && | |
355 | (tt_microwire.mask = 0x7ff, | |
356 | udelay(1), | |
357 | tt_microwire.data = MW_LM1992_PSG_HIGH | MW_LM1992_ADDR, | |
358 | udelay(1), | |
359 | tt_microwire.data != 0)) { | |
360 | ATARIHW_SET(MICROWIRE); | |
361 | while (tt_microwire.mask != 0x7ff) | |
362 | ; | |
363 | printk("MICROWIRE "); | |
364 | } | |
1da177e4 | 365 | #endif |
6ff5801a RZ |
366 | if (hwreg_present(&tt_rtc.regsel)) { |
367 | ATARIHW_SET(TT_CLK); | |
368 | printk("TT_CLK "); | |
369 | mach_hwclk = atari_tt_hwclk; | |
370 | mach_set_clock_mmss = atari_tt_set_clock_mmss; | |
371 | } | |
372 | if (!MACH_IS_HADES && hwreg_present(&mste_rtc.sec_ones)) { | |
373 | ATARIHW_SET(MSTE_CLK); | |
374 | printk("MSTE_CLK "); | |
375 | mach_hwclk = atari_mste_hwclk; | |
376 | mach_set_clock_mmss = atari_mste_set_clock_mmss; | |
377 | } | |
378 | if (!MACH_IS_MEDUSA && !MACH_IS_HADES && | |
379 | hwreg_present(&dma_wd.fdc_speed) && | |
380 | hwreg_write(&dma_wd.fdc_speed, 0)) { | |
381 | ATARIHW_SET(FDCSPEED); | |
382 | printk("FDC_SPEED "); | |
383 | } | |
384 | if (!MACH_IS_HADES && !ATARIHW_PRESENT(ST_SCSI)) { | |
385 | ATARIHW_SET(ACSI); | |
386 | printk("ACSI "); | |
387 | } | |
388 | printk("\n"); | |
389 | ||
390 | if (CPU_IS_040_OR_060) | |
391 | /* Now it seems to be safe to turn of the tt0 transparent | |
392 | * translation (the one that must not be turned off in | |
393 | * head.S...) | |
394 | */ | |
395 | asm volatile ("\n" | |
396 | " moveq #0,%%d0\n" | |
397 | " .chip 68040\n" | |
398 | " movec %%d0,%%itt0\n" | |
399 | " movec %%d0,%%dtt0\n" | |
400 | " .chip 68k" | |
401 | : /* no outputs */ | |
402 | : /* no inputs */ | |
403 | : "d0"); | |
404 | ||
405 | /* allocator for memory that must reside in st-ram */ | |
406 | atari_stram_init(); | |
407 | ||
408 | /* Set up a mapping for the VMEbus address region: | |
409 | * | |
410 | * VME is either at phys. 0xfexxxxxx (TT) or 0xa00000..0xdfffff | |
411 | * (MegaSTE) In both cases, the whole 16 MB chunk is mapped at | |
412 | * 0xfe000000 virt., because this can be done with a single | |
413 | * transparent translation. On the 68040, lots of often unused | |
414 | * page tables would be needed otherwise. On a MegaSTE or similar, | |
415 | * the highest byte is stripped off by hardware due to the 24 bit | |
416 | * design of the bus. | |
417 | */ | |
418 | ||
419 | if (CPU_IS_020_OR_030) { | |
420 | unsigned long tt1_val; | |
421 | tt1_val = 0xfe008543; /* Translate 0xfexxxxxx, enable, cache | |
422 | * inhibit, read and write, FDC mask = 3, | |
423 | * FDC val = 4 -> Supervisor only */ | |
424 | asm volatile ("\n" | |
425 | " .chip 68030\n" | |
426 | " pmove %0@,%/tt1\n" | |
427 | " .chip 68k" | |
428 | : : "a" (&tt1_val)); | |
429 | } else { | |
430 | asm volatile ("\n" | |
431 | " .chip 68040\n" | |
432 | " movec %0,%%itt1\n" | |
433 | " movec %0,%%dtt1\n" | |
434 | " .chip 68k" | |
435 | : | |
436 | : "d" (0xfe00a040)); /* Translate 0xfexxxxxx, enable, | |
437 | * supervisor only, non-cacheable/ | |
438 | * serialized, writable */ | |
439 | ||
440 | } | |
1da177e4 | 441 | |
6ff5801a RZ |
442 | /* Fetch tos version at Physical 2 */ |
443 | /* | |
444 | * We my not be able to access this address if the kernel is | |
445 | * loaded to st ram, since the first page is unmapped. On the | |
446 | * Medusa this is always the case and there is nothing we can do | |
447 | * about this, so we just assume the smaller offset. For the TT | |
448 | * we use the fact that in head.S we have set up a mapping | |
449 | * 0xFFxxxxxx -> 0x00xxxxxx, so that the first 16MB is accessible | |
450 | * in the last 16MB of the address space. | |
451 | */ | |
452 | tos_version = (MACH_IS_MEDUSA || MACH_IS_HADES) ? | |
453 | 0xfff : *(unsigned short *)0xff000002; | |
454 | atari_rtc_year_offset = (tos_version < 0x306) ? 70 : 68; | |
1da177e4 LT |
455 | } |
456 | ||
457 | #ifdef CONFIG_HEARTBEAT | |
6ff5801a | 458 | static void atari_heartbeat(int on) |
1da177e4 | 459 | { |
6ff5801a RZ |
460 | unsigned char tmp; |
461 | unsigned long flags; | |
1da177e4 | 462 | |
6ff5801a RZ |
463 | if (atari_dont_touch_floppy_select) |
464 | return; | |
1da177e4 | 465 | |
6ff5801a RZ |
466 | local_irq_save(flags); |
467 | sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ | |
468 | tmp = sound_ym.rd_data_reg_sel; | |
469 | sound_ym.wd_data = on ? (tmp & ~0x02) : (tmp | 0x02); | |
470 | local_irq_restore(flags); | |
1da177e4 LT |
471 | } |
472 | #endif | |
473 | ||
474 | /* ++roman: | |
475 | * | |
476 | * This function does a reset on machines that lack the ability to | |
477 | * assert the processor's _RESET signal somehow via hardware. It is | |
478 | * based on the fact that you can find the initial SP and PC values | |
479 | * after a reset at physical addresses 0 and 4. This works pretty well | |
480 | * for Atari machines, since the lowest 8 bytes of physical memory are | |
481 | * really ROM (mapped by hardware). For other 680x0 machines: don't | |
482 | * know if it works... | |
483 | * | |
484 | * To get the values at addresses 0 and 4, the MMU better is turned | |
485 | * off first. After that, we have to jump into physical address space | |
486 | * (the PC before the pmove statement points to the virtual address of | |
487 | * the code). Getting that physical address is not hard, but the code | |
488 | * becomes a bit complex since I've tried to ensure that the jump | |
489 | * statement after the pmove is in the cache already (otherwise the | |
490 | * processor can't fetch it!). For that, the code first jumps to the | |
491 | * jump statement with the (virtual) address of the pmove section in | |
492 | * an address register . The jump statement is surely in the cache | |
493 | * now. After that, that physical address of the reset code is loaded | |
494 | * into the same address register, pmove is done and the same jump | |
495 | * statements goes to the reset code. Since there are not many | |
496 | * statements between the two jumps, I hope it stays in the cache. | |
497 | * | |
498 | * The C code makes heavy use of the GCC features that you can get the | |
499 | * address of a C label. No hope to compile this with another compiler | |
500 | * than GCC! | |
501 | */ | |
502 | ||
503 | /* ++andreas: no need for complicated code, just depend on prefetch */ | |
504 | ||
6ff5801a | 505 | static void atari_reset(void) |
1da177e4 | 506 | { |
6ff5801a RZ |
507 | long tc_val = 0; |
508 | long reset_addr; | |
509 | ||
510 | /* | |
511 | * On the Medusa, phys. 0x4 may contain garbage because it's no | |
512 | * ROM. See above for explanation why we cannot use PTOV(4). | |
513 | */ | |
514 | reset_addr = MACH_IS_HADES ? 0x7fe00030 : | |
515 | MACH_IS_MEDUSA || MACH_IS_AB40 ? 0xe00030 : | |
516 | *(unsigned long *) 0xff000004; | |
517 | ||
518 | /* reset ACIA for switch off OverScan, if it's active */ | |
519 | if (atari_switches & ATARI_SWITCH_OVSC_IKBD) | |
520 | acia.key_ctrl = ACIA_RESET; | |
521 | if (atari_switches & ATARI_SWITCH_OVSC_MIDI) | |
522 | acia.mid_ctrl = ACIA_RESET; | |
523 | ||
524 | /* processor independent: turn off interrupts and reset the VBR; | |
525 | * the caches must be left enabled, else prefetching the final jump | |
526 | * instruction doesn't work. | |
527 | */ | |
528 | local_irq_disable(); | |
529 | asm volatile ("movec %0,%%vbr" | |
530 | : : "d" (0)); | |
531 | ||
532 | if (CPU_IS_040_OR_060) { | |
533 | unsigned long jmp_addr040 = virt_to_phys(&&jmp_addr_label040); | |
534 | if (CPU_IS_060) { | |
535 | /* 68060: clear PCR to turn off superscalar operation */ | |
536 | asm volatile ("\n" | |
537 | " .chip 68060\n" | |
538 | " movec %0,%%pcr\n" | |
539 | " .chip 68k" | |
540 | : : "d" (0)); | |
541 | } | |
542 | ||
543 | asm volatile ("\n" | |
544 | " move.l %0,%%d0\n" | |
545 | " and.l #0xff000000,%%d0\n" | |
546 | " or.w #0xe020,%%d0\n" /* map 16 MB, enable, cacheable */ | |
547 | " .chip 68040\n" | |
548 | " movec %%d0,%%itt0\n" | |
549 | " movec %%d0,%%dtt0\n" | |
550 | " .chip 68k\n" | |
551 | " jmp %0@" | |
552 | : : "a" (jmp_addr040) | |
553 | : "d0"); | |
554 | jmp_addr_label040: | |
555 | asm volatile ("\n" | |
556 | " moveq #0,%%d0\n" | |
557 | " nop\n" | |
558 | " .chip 68040\n" | |
559 | " cinva %%bc\n" | |
560 | " nop\n" | |
561 | " pflusha\n" | |
562 | " nop\n" | |
563 | " movec %%d0,%%tc\n" | |
564 | " nop\n" | |
565 | /* the following setup of transparent translations is needed on the | |
566 | * Afterburner040 to successfully reboot. Other machines shouldn't | |
567 | * care about a different tt regs setup, they also didn't care in | |
568 | * the past that the regs weren't turned off. */ | |
569 | " move.l #0xffc000,%%d0\n" /* whole insn space cacheable */ | |
570 | " movec %%d0,%%itt0\n" | |
571 | " movec %%d0,%%itt1\n" | |
572 | " or.w #0x40,%/d0\n" /* whole data space non-cacheable/ser. */ | |
573 | " movec %%d0,%%dtt0\n" | |
574 | " movec %%d0,%%dtt1\n" | |
575 | " .chip 68k\n" | |
576 | " jmp %0@" | |
577 | : /* no outputs */ | |
578 | : "a" (reset_addr) | |
579 | : "d0"); | |
580 | } else | |
581 | asm volatile ("\n" | |
582 | " pmove %0@,%%tc\n" | |
583 | " jmp %1@" | |
584 | : /* no outputs */ | |
585 | : "a" (&tc_val), "a" (reset_addr)); | |
1da177e4 LT |
586 | } |
587 | ||
588 | ||
589 | static void atari_get_model(char *model) | |
590 | { | |
6ff5801a RZ |
591 | strcpy(model, "Atari "); |
592 | switch (atari_mch_cookie >> 16) { | |
1da177e4 | 593 | case ATARI_MCH_ST: |
6ff5801a RZ |
594 | if (ATARIHW_PRESENT(MSTE_CLK)) |
595 | strcat(model, "Mega ST"); | |
596 | else | |
597 | strcat(model, "ST"); | |
598 | break; | |
1da177e4 | 599 | case ATARI_MCH_STE: |
6ff5801a RZ |
600 | if (MACH_IS_MSTE) |
601 | strcat(model, "Mega STE"); | |
602 | else | |
603 | strcat(model, "STE"); | |
604 | break; | |
1da177e4 | 605 | case ATARI_MCH_TT: |
6ff5801a RZ |
606 | if (MACH_IS_MEDUSA) |
607 | /* Medusa has TT _MCH cookie */ | |
608 | strcat(model, "Medusa"); | |
609 | else if (MACH_IS_HADES) | |
610 | strcat(model, "Hades"); | |
611 | else | |
612 | strcat(model, "TT"); | |
613 | break; | |
1da177e4 | 614 | case ATARI_MCH_FALCON: |
6ff5801a RZ |
615 | strcat(model, "Falcon"); |
616 | if (MACH_IS_AB40) | |
617 | strcat(model, " (with Afterburner040)"); | |
618 | break; | |
1da177e4 | 619 | default: |
6ff5801a RZ |
620 | sprintf(model + strlen(model), "(unknown mach cookie 0x%lx)", |
621 | atari_mch_cookie); | |
622 | break; | |
623 | } | |
1da177e4 LT |
624 | } |
625 | ||
626 | ||
627 | static int atari_get_hardware_list(char *buffer) | |
628 | { | |
6ff5801a RZ |
629 | int len = 0, i; |
630 | ||
631 | for (i = 0; i < m68k_num_memory; i++) | |
632 | len += sprintf(buffer+len, "\t%3ld MB at 0x%08lx (%s)\n", | |
633 | m68k_memory[i].size >> 20, m68k_memory[i].addr, | |
634 | (m68k_memory[i].addr & 0xff000000 ? | |
635 | "alternate RAM" : "ST-RAM")); | |
636 | ||
637 | #define ATARIHW_ANNOUNCE(name, str) \ | |
638 | if (ATARIHW_PRESENT(name)) \ | |
639 | len += sprintf(buffer + len, "\t%s\n", str) | |
640 | ||
641 | len += sprintf(buffer + len, "Detected hardware:\n"); | |
642 | ATARIHW_ANNOUNCE(STND_SHIFTER, "ST Shifter"); | |
643 | ATARIHW_ANNOUNCE(EXTD_SHIFTER, "STe Shifter"); | |
644 | ATARIHW_ANNOUNCE(TT_SHIFTER, "TT Shifter"); | |
645 | ATARIHW_ANNOUNCE(VIDEL_SHIFTER, "Falcon Shifter"); | |
646 | ATARIHW_ANNOUNCE(YM_2149, "Programmable Sound Generator"); | |
647 | ATARIHW_ANNOUNCE(PCM_8BIT, "PCM 8 Bit Sound"); | |
648 | ATARIHW_ANNOUNCE(CODEC, "CODEC Sound"); | |
649 | ATARIHW_ANNOUNCE(TT_SCSI, "SCSI Controller NCR5380 (TT style)"); | |
650 | ATARIHW_ANNOUNCE(ST_SCSI, "SCSI Controller NCR5380 (Falcon style)"); | |
651 | ATARIHW_ANNOUNCE(ACSI, "ACSI Interface"); | |
652 | ATARIHW_ANNOUNCE(IDE, "IDE Interface"); | |
653 | ATARIHW_ANNOUNCE(FDCSPEED, "8/16 Mhz Switch for FDC"); | |
654 | ATARIHW_ANNOUNCE(ST_MFP, "Multi Function Peripheral MFP 68901"); | |
655 | ATARIHW_ANNOUNCE(TT_MFP, "Second Multi Function Peripheral MFP 68901"); | |
656 | ATARIHW_ANNOUNCE(SCC, "Serial Communications Controller SCC 8530"); | |
657 | ATARIHW_ANNOUNCE(ST_ESCC, "Extended Serial Communications Controller SCC 85230"); | |
658 | ATARIHW_ANNOUNCE(ANALOG_JOY, "Paddle Interface"); | |
659 | ATARIHW_ANNOUNCE(MICROWIRE, "MICROWIRE(tm) Interface"); | |
660 | ATARIHW_ANNOUNCE(STND_DMA, "DMA Controller (24 bit)"); | |
661 | ATARIHW_ANNOUNCE(EXTD_DMA, "DMA Controller (32 bit)"); | |
662 | ATARIHW_ANNOUNCE(SCSI_DMA, "DMA Controller for NCR5380"); | |
663 | ATARIHW_ANNOUNCE(SCC_DMA, "DMA Controller for SCC"); | |
664 | ATARIHW_ANNOUNCE(TT_CLK, "Clock Chip MC146818A"); | |
665 | ATARIHW_ANNOUNCE(MSTE_CLK, "Clock Chip RP5C15"); | |
666 | ATARIHW_ANNOUNCE(SCU, "System Control Unit"); | |
667 | ATARIHW_ANNOUNCE(BLITTER, "Blitter"); | |
668 | ATARIHW_ANNOUNCE(VME, "VME Bus"); | |
669 | ATARIHW_ANNOUNCE(DSP56K, "DSP56001 processor"); | |
670 | ||
671 | return len; | |
1da177e4 | 672 | } |