Commit | Line | Data |
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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> | |
813dcf7a | 29 | #include <linux/seq_file.h> |
1da177e4 LT |
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> | |
a3b2004a | 35 | #include <linux/module.h> |
1da177e4 LT |
36 | |
37 | #include <asm/bootinfo.h> | |
38 | #include <asm/setup.h> | |
39 | #include <asm/atarihw.h> | |
40 | #include <asm/atariints.h> | |
41 | #include <asm/atari_stram.h> | |
42 | #include <asm/system.h> | |
43 | #include <asm/machdep.h> | |
44 | #include <asm/hwtest.h> | |
45 | #include <asm/io.h> | |
46 | ||
47 | u_long atari_mch_cookie; | |
a3b2004a AB |
48 | EXPORT_SYMBOL(atari_mch_cookie); |
49 | ||
1da177e4 | 50 | u_long atari_mch_type; |
a3b2004a AB |
51 | EXPORT_SYMBOL(atari_mch_type); |
52 | ||
1da177e4 | 53 | struct atari_hw_present atari_hw_present; |
a3b2004a AB |
54 | EXPORT_SYMBOL(atari_hw_present); |
55 | ||
1da177e4 | 56 | u_long atari_switches; |
a3b2004a AB |
57 | EXPORT_SYMBOL(atari_switches); |
58 | ||
1da177e4 | 59 | int atari_dont_touch_floppy_select; |
a3b2004a AB |
60 | EXPORT_SYMBOL(atari_dont_touch_floppy_select); |
61 | ||
1da177e4 LT |
62 | int atari_rtc_year_offset; |
63 | ||
64 | /* local function prototypes */ | |
6ff5801a | 65 | static void atari_reset(void); |
1da177e4 | 66 | static void atari_get_model(char *model); |
813dcf7a | 67 | static void atari_get_hardware_list(struct seq_file *m); |
1da177e4 LT |
68 | |
69 | /* atari specific irq functions */ | |
70 | extern void atari_init_IRQ (void); | |
6ff5801a | 71 | extern void atari_mksound(unsigned int count, unsigned int ticks); |
1da177e4 | 72 | #ifdef CONFIG_HEARTBEAT |
6ff5801a | 73 | static void atari_heartbeat(int on); |
1da177e4 LT |
74 | #endif |
75 | ||
76 | /* atari specific timer functions (in time.c) */ | |
6ff5801a | 77 | extern void atari_sched_init(irq_handler_t); |
1da177e4 LT |
78 | extern unsigned long atari_gettimeoffset (void); |
79 | extern int atari_mste_hwclk (int, struct rtc_time *); | |
80 | extern int atari_tt_hwclk (int, struct rtc_time *); | |
81 | extern int atari_mste_set_clock_mmss (unsigned long); | |
82 | extern int atari_tt_set_clock_mmss (unsigned long); | |
83 | ||
1da177e4 | 84 | |
1da177e4 LT |
85 | /* ++roman: This is a more elaborate test for an SCC chip, since the plain |
86 | * Medusa board generates DTACK at the SCC's standard addresses, but a SCC | |
87 | * board in the Medusa is possible. Also, the addresses where the ST_ESCC | |
88 | * resides generate DTACK without the chip, too. | |
89 | * The method is to write values into the interrupt vector register, that | |
90 | * should be readable without trouble (from channel A!). | |
91 | */ | |
92 | ||
6ff5801a | 93 | static int __init scc_test(volatile char *ctla) |
1da177e4 | 94 | { |
6ff5801a RZ |
95 | if (!hwreg_present(ctla)) |
96 | return 0; | |
1da177e4 LT |
97 | MFPDELAY(); |
98 | ||
6ff5801a RZ |
99 | *ctla = 2; |
100 | MFPDELAY(); | |
101 | *ctla = 0x40; | |
102 | MFPDELAY(); | |
1da177e4 | 103 | |
6ff5801a RZ |
104 | *ctla = 2; |
105 | MFPDELAY(); | |
106 | if (*ctla != 0x40) | |
107 | return 0; | |
1da177e4 LT |
108 | MFPDELAY(); |
109 | ||
6ff5801a RZ |
110 | *ctla = 2; |
111 | MFPDELAY(); | |
112 | *ctla = 0x60; | |
113 | MFPDELAY(); | |
1da177e4 | 114 | |
6ff5801a RZ |
115 | *ctla = 2; |
116 | MFPDELAY(); | |
117 | if (*ctla != 0x60) | |
118 | return 0; | |
1da177e4 | 119 | |
6ff5801a | 120 | return 1; |
1da177e4 LT |
121 | } |
122 | ||
123 | ||
124 | /* | |
125 | * Parse an Atari-specific record in the bootinfo | |
126 | */ | |
127 | ||
128 | int __init atari_parse_bootinfo(const struct bi_record *record) | |
129 | { | |
6ff5801a RZ |
130 | int unknown = 0; |
131 | const u_long *data = record->data; | |
1da177e4 | 132 | |
6ff5801a | 133 | switch (record->tag) { |
1da177e4 | 134 | case BI_ATARI_MCH_COOKIE: |
6ff5801a RZ |
135 | atari_mch_cookie = *data; |
136 | break; | |
1da177e4 | 137 | case BI_ATARI_MCH_TYPE: |
6ff5801a RZ |
138 | atari_mch_type = *data; |
139 | break; | |
1da177e4 | 140 | default: |
6ff5801a RZ |
141 | unknown = 1; |
142 | break; | |
143 | } | |
144 | return unknown; | |
1da177e4 LT |
145 | } |
146 | ||
147 | ||
148 | /* Parse the Atari-specific switches= option. */ | |
d6713b40 | 149 | static int __init atari_switches_setup(char *str) |
1da177e4 | 150 | { |
d6713b40 | 151 | char switches[strlen(str) + 1]; |
6ff5801a RZ |
152 | char *p; |
153 | int ovsc_shift; | |
154 | char *args = switches; | |
155 | ||
d6713b40 RZ |
156 | if (!MACH_IS_ATARI) |
157 | return 0; | |
158 | ||
6ff5801a | 159 | /* copy string to local array, strsep works destructively... */ |
d6713b40 | 160 | strcpy(switches, str); |
6ff5801a RZ |
161 | atari_switches = 0; |
162 | ||
163 | /* parse the options */ | |
164 | while ((p = strsep(&args, ",")) != NULL) { | |
165 | if (!*p) | |
166 | continue; | |
167 | ovsc_shift = 0; | |
168 | if (strncmp(p, "ov_", 3) == 0) { | |
169 | p += 3; | |
170 | ovsc_shift = ATARI_SWITCH_OVSC_SHIFT; | |
171 | } | |
172 | ||
173 | if (strcmp(p, "ikbd") == 0) { | |
174 | /* RTS line of IKBD ACIA */ | |
175 | atari_switches |= ATARI_SWITCH_IKBD << ovsc_shift; | |
176 | } else if (strcmp(p, "midi") == 0) { | |
177 | /* RTS line of MIDI ACIA */ | |
178 | atari_switches |= ATARI_SWITCH_MIDI << ovsc_shift; | |
179 | } else if (strcmp(p, "snd6") == 0) { | |
180 | atari_switches |= ATARI_SWITCH_SND6 << ovsc_shift; | |
181 | } else if (strcmp(p, "snd7") == 0) { | |
182 | atari_switches |= ATARI_SWITCH_SND7 << ovsc_shift; | |
183 | } | |
1da177e4 | 184 | } |
d6713b40 | 185 | return 0; |
1da177e4 LT |
186 | } |
187 | ||
d6713b40 RZ |
188 | early_param("switches", atari_switches_setup); |
189 | ||
1da177e4 LT |
190 | |
191 | /* | |
192 | * Setup the Atari configuration info | |
193 | */ | |
194 | ||
195 | void __init config_atari(void) | |
196 | { | |
6ff5801a | 197 | unsigned short tos_version; |
1da177e4 | 198 | |
6ff5801a | 199 | memset(&atari_hw_present, 0, sizeof(atari_hw_present)); |
1da177e4 | 200 | |
6ff5801a RZ |
201 | /* Change size of I/O space from 64KB to 4GB. */ |
202 | ioport_resource.end = 0xFFFFFFFF; | |
1da177e4 | 203 | |
6ff5801a RZ |
204 | mach_sched_init = atari_sched_init; |
205 | mach_init_IRQ = atari_init_IRQ; | |
206 | mach_get_model = atari_get_model; | |
207 | mach_get_hardware_list = atari_get_hardware_list; | |
208 | mach_gettimeoffset = atari_gettimeoffset; | |
209 | mach_reset = atari_reset; | |
210 | mach_max_dma_address = 0xffffff; | |
1da177e4 | 211 | #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) |
6ff5801a | 212 | mach_beep = atari_mksound; |
1da177e4 LT |
213 | #endif |
214 | #ifdef CONFIG_HEARTBEAT | |
6ff5801a | 215 | mach_heartbeat = atari_heartbeat; |
1da177e4 LT |
216 | #endif |
217 | ||
6ff5801a RZ |
218 | /* Set switches as requested by the user */ |
219 | if (atari_switches & ATARI_SWITCH_IKBD) | |
220 | acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID; | |
221 | if (atari_switches & ATARI_SWITCH_MIDI) | |
222 | acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID; | |
223 | if (atari_switches & (ATARI_SWITCH_SND6|ATARI_SWITCH_SND7)) { | |
224 | sound_ym.rd_data_reg_sel = 14; | |
225 | sound_ym.wd_data = sound_ym.rd_data_reg_sel | | |
226 | ((atari_switches&ATARI_SWITCH_SND6) ? 0x40 : 0) | | |
227 | ((atari_switches&ATARI_SWITCH_SND7) ? 0x80 : 0); | |
228 | } | |
1da177e4 | 229 | |
6ff5801a RZ |
230 | /* ++bjoern: |
231 | * Determine hardware present | |
232 | */ | |
233 | ||
234 | printk("Atari hardware found: "); | |
29c8a246 | 235 | if (MACH_IS_MEDUSA) { |
6ff5801a RZ |
236 | /* There's no Atari video hardware on the Medusa, but all the |
237 | * addresses below generate a DTACK so no bus error occurs! */ | |
238 | } else if (hwreg_present(f030_xreg)) { | |
239 | ATARIHW_SET(VIDEL_SHIFTER); | |
240 | printk("VIDEL "); | |
241 | /* This is a temporary hack: If there is Falcon video | |
242 | * hardware, we assume that the ST-DMA serves SCSI instead of | |
243 | * ACSI. In the future, there should be a better method for | |
244 | * this... | |
245 | */ | |
246 | ATARIHW_SET(ST_SCSI); | |
247 | printk("STDMA-SCSI "); | |
248 | } else if (hwreg_present(tt_palette)) { | |
249 | ATARIHW_SET(TT_SHIFTER); | |
250 | printk("TT_SHIFTER "); | |
251 | } else if (hwreg_present(&shifter.bas_hi)) { | |
252 | if (hwreg_present(&shifter.bas_lo) && | |
253 | (shifter.bas_lo = 0x0aau, shifter.bas_lo == 0x0aau)) { | |
254 | ATARIHW_SET(EXTD_SHIFTER); | |
255 | printk("EXTD_SHIFTER "); | |
256 | } else { | |
257 | ATARIHW_SET(STND_SHIFTER); | |
258 | printk("STND_SHIFTER "); | |
259 | } | |
260 | } | |
3d92e8f3 | 261 | if (hwreg_present(&st_mfp.par_dt_reg)) { |
6ff5801a RZ |
262 | ATARIHW_SET(ST_MFP); |
263 | printk("ST_MFP "); | |
264 | } | |
265 | if (hwreg_present(&tt_mfp.par_dt_reg)) { | |
266 | ATARIHW_SET(TT_MFP); | |
267 | printk("TT_MFP "); | |
268 | } | |
269 | if (hwreg_present(&tt_scsi_dma.dma_addr_hi)) { | |
270 | ATARIHW_SET(SCSI_DMA); | |
271 | printk("TT_SCSI_DMA "); | |
272 | } | |
6ff5801a RZ |
273 | /* |
274 | * The ST-DMA address registers aren't readable | |
275 | * on all Medusas, so the test below may fail | |
276 | */ | |
277 | if (MACH_IS_MEDUSA || | |
278 | (hwreg_present(&st_dma.dma_vhi) && | |
279 | (st_dma.dma_vhi = 0x55) && (st_dma.dma_hi = 0xaa) && | |
280 | st_dma.dma_vhi == 0x55 && st_dma.dma_hi == 0xaa && | |
281 | (st_dma.dma_vhi = 0xaa) && (st_dma.dma_hi = 0x55) && | |
282 | st_dma.dma_vhi == 0xaa && st_dma.dma_hi == 0x55)) { | |
283 | ATARIHW_SET(EXTD_DMA); | |
284 | printk("EXTD_DMA "); | |
285 | } | |
286 | if (hwreg_present(&tt_scsi.scsi_data)) { | |
287 | ATARIHW_SET(TT_SCSI); | |
288 | printk("TT_SCSI "); | |
289 | } | |
290 | if (hwreg_present(&sound_ym.rd_data_reg_sel)) { | |
291 | ATARIHW_SET(YM_2149); | |
292 | printk("YM2149 "); | |
293 | } | |
29c8a246 | 294 | if (!MACH_IS_MEDUSA && hwreg_present(&tt_dmasnd.ctrl)) { |
6ff5801a RZ |
295 | ATARIHW_SET(PCM_8BIT); |
296 | printk("PCM "); | |
297 | } | |
29c8a246 | 298 | if (hwreg_present(&falcon_codec.unused5)) { |
6ff5801a RZ |
299 | ATARIHW_SET(CODEC); |
300 | printk("CODEC "); | |
301 | } | |
302 | if (hwreg_present(&dsp56k_host_interface.icr)) { | |
303 | ATARIHW_SET(DSP56K); | |
304 | printk("DSP56K "); | |
305 | } | |
306 | if (hwreg_present(&tt_scc_dma.dma_ctrl) && | |
1da177e4 | 307 | #if 0 |
6ff5801a RZ |
308 | /* This test sucks! Who knows some better? */ |
309 | (tt_scc_dma.dma_ctrl = 0x01, (tt_scc_dma.dma_ctrl & 1) == 1) && | |
310 | (tt_scc_dma.dma_ctrl = 0x00, (tt_scc_dma.dma_ctrl & 1) == 0) | |
1da177e4 | 311 | #else |
29c8a246 | 312 | !MACH_IS_MEDUSA |
1da177e4 | 313 | #endif |
6ff5801a RZ |
314 | ) { |
315 | ATARIHW_SET(SCC_DMA); | |
316 | printk("SCC_DMA "); | |
317 | } | |
318 | if (scc_test(&scc.cha_a_ctrl)) { | |
319 | ATARIHW_SET(SCC); | |
320 | printk("SCC "); | |
321 | } | |
322 | if (scc_test(&st_escc.cha_b_ctrl)) { | |
323 | ATARIHW_SET(ST_ESCC); | |
324 | printk("ST_ESCC "); | |
325 | } | |
29c8a246 | 326 | if (hwreg_present(&tt_scu.sys_mask)) { |
6ff5801a RZ |
327 | ATARIHW_SET(SCU); |
328 | /* Assume a VME bus if there's a SCU */ | |
329 | ATARIHW_SET(VME); | |
330 | printk("VME SCU "); | |
331 | } | |
332 | if (hwreg_present((void *)(0xffff9210))) { | |
333 | ATARIHW_SET(ANALOG_JOY); | |
334 | printk("ANALOG_JOY "); | |
335 | } | |
29c8a246 | 336 | if (hwreg_present(blitter.halftone)) { |
6ff5801a RZ |
337 | ATARIHW_SET(BLITTER); |
338 | printk("BLITTER "); | |
339 | } | |
340 | if (hwreg_present((void *)0xfff00039)) { | |
341 | ATARIHW_SET(IDE); | |
342 | printk("IDE "); | |
343 | } | |
1da177e4 | 344 | #if 1 /* This maybe wrong */ |
29c8a246 | 345 | if (!MACH_IS_MEDUSA && hwreg_present(&tt_microwire.data) && |
6ff5801a RZ |
346 | hwreg_present(&tt_microwire.mask) && |
347 | (tt_microwire.mask = 0x7ff, | |
348 | udelay(1), | |
349 | tt_microwire.data = MW_LM1992_PSG_HIGH | MW_LM1992_ADDR, | |
350 | udelay(1), | |
351 | tt_microwire.data != 0)) { | |
352 | ATARIHW_SET(MICROWIRE); | |
353 | while (tt_microwire.mask != 0x7ff) | |
354 | ; | |
355 | printk("MICROWIRE "); | |
356 | } | |
1da177e4 | 357 | #endif |
6ff5801a RZ |
358 | if (hwreg_present(&tt_rtc.regsel)) { |
359 | ATARIHW_SET(TT_CLK); | |
360 | printk("TT_CLK "); | |
361 | mach_hwclk = atari_tt_hwclk; | |
362 | mach_set_clock_mmss = atari_tt_set_clock_mmss; | |
363 | } | |
29c8a246 | 364 | if (hwreg_present(&mste_rtc.sec_ones)) { |
6ff5801a RZ |
365 | ATARIHW_SET(MSTE_CLK); |
366 | printk("MSTE_CLK "); | |
367 | mach_hwclk = atari_mste_hwclk; | |
368 | mach_set_clock_mmss = atari_mste_set_clock_mmss; | |
369 | } | |
29c8a246 | 370 | if (!MACH_IS_MEDUSA && hwreg_present(&dma_wd.fdc_speed) && |
6ff5801a RZ |
371 | hwreg_write(&dma_wd.fdc_speed, 0)) { |
372 | ATARIHW_SET(FDCSPEED); | |
373 | printk("FDC_SPEED "); | |
374 | } | |
29c8a246 | 375 | if (!ATARIHW_PRESENT(ST_SCSI)) { |
6ff5801a RZ |
376 | ATARIHW_SET(ACSI); |
377 | printk("ACSI "); | |
378 | } | |
379 | printk("\n"); | |
380 | ||
381 | if (CPU_IS_040_OR_060) | |
382 | /* Now it seems to be safe to turn of the tt0 transparent | |
383 | * translation (the one that must not be turned off in | |
384 | * head.S...) | |
385 | */ | |
386 | asm volatile ("\n" | |
387 | " moveq #0,%%d0\n" | |
388 | " .chip 68040\n" | |
389 | " movec %%d0,%%itt0\n" | |
390 | " movec %%d0,%%dtt0\n" | |
391 | " .chip 68k" | |
392 | : /* no outputs */ | |
393 | : /* no inputs */ | |
394 | : "d0"); | |
395 | ||
396 | /* allocator for memory that must reside in st-ram */ | |
397 | atari_stram_init(); | |
398 | ||
399 | /* Set up a mapping for the VMEbus address region: | |
400 | * | |
401 | * VME is either at phys. 0xfexxxxxx (TT) or 0xa00000..0xdfffff | |
402 | * (MegaSTE) In both cases, the whole 16 MB chunk is mapped at | |
403 | * 0xfe000000 virt., because this can be done with a single | |
404 | * transparent translation. On the 68040, lots of often unused | |
405 | * page tables would be needed otherwise. On a MegaSTE or similar, | |
406 | * the highest byte is stripped off by hardware due to the 24 bit | |
407 | * design of the bus. | |
408 | */ | |
409 | ||
410 | if (CPU_IS_020_OR_030) { | |
411 | unsigned long tt1_val; | |
412 | tt1_val = 0xfe008543; /* Translate 0xfexxxxxx, enable, cache | |
413 | * inhibit, read and write, FDC mask = 3, | |
414 | * FDC val = 4 -> Supervisor only */ | |
415 | asm volatile ("\n" | |
416 | " .chip 68030\n" | |
417 | " pmove %0@,%/tt1\n" | |
418 | " .chip 68k" | |
419 | : : "a" (&tt1_val)); | |
420 | } else { | |
421 | asm volatile ("\n" | |
422 | " .chip 68040\n" | |
423 | " movec %0,%%itt1\n" | |
424 | " movec %0,%%dtt1\n" | |
425 | " .chip 68k" | |
426 | : | |
427 | : "d" (0xfe00a040)); /* Translate 0xfexxxxxx, enable, | |
428 | * supervisor only, non-cacheable/ | |
429 | * serialized, writable */ | |
430 | ||
431 | } | |
1da177e4 | 432 | |
6ff5801a RZ |
433 | /* Fetch tos version at Physical 2 */ |
434 | /* | |
435 | * We my not be able to access this address if the kernel is | |
436 | * loaded to st ram, since the first page is unmapped. On the | |
437 | * Medusa this is always the case and there is nothing we can do | |
438 | * about this, so we just assume the smaller offset. For the TT | |
439 | * we use the fact that in head.S we have set up a mapping | |
440 | * 0xFFxxxxxx -> 0x00xxxxxx, so that the first 16MB is accessible | |
441 | * in the last 16MB of the address space. | |
442 | */ | |
29c8a246 | 443 | tos_version = (MACH_IS_MEDUSA) ? |
6ff5801a RZ |
444 | 0xfff : *(unsigned short *)0xff000002; |
445 | atari_rtc_year_offset = (tos_version < 0x306) ? 70 : 68; | |
1da177e4 LT |
446 | } |
447 | ||
448 | #ifdef CONFIG_HEARTBEAT | |
6ff5801a | 449 | static void atari_heartbeat(int on) |
1da177e4 | 450 | { |
6ff5801a RZ |
451 | unsigned char tmp; |
452 | unsigned long flags; | |
1da177e4 | 453 | |
6ff5801a RZ |
454 | if (atari_dont_touch_floppy_select) |
455 | return; | |
1da177e4 | 456 | |
6ff5801a RZ |
457 | local_irq_save(flags); |
458 | sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ | |
459 | tmp = sound_ym.rd_data_reg_sel; | |
460 | sound_ym.wd_data = on ? (tmp & ~0x02) : (tmp | 0x02); | |
461 | local_irq_restore(flags); | |
1da177e4 LT |
462 | } |
463 | #endif | |
464 | ||
465 | /* ++roman: | |
466 | * | |
467 | * This function does a reset on machines that lack the ability to | |
468 | * assert the processor's _RESET signal somehow via hardware. It is | |
469 | * based on the fact that you can find the initial SP and PC values | |
470 | * after a reset at physical addresses 0 and 4. This works pretty well | |
471 | * for Atari machines, since the lowest 8 bytes of physical memory are | |
472 | * really ROM (mapped by hardware). For other 680x0 machines: don't | |
473 | * know if it works... | |
474 | * | |
475 | * To get the values at addresses 0 and 4, the MMU better is turned | |
476 | * off first. After that, we have to jump into physical address space | |
477 | * (the PC before the pmove statement points to the virtual address of | |
478 | * the code). Getting that physical address is not hard, but the code | |
479 | * becomes a bit complex since I've tried to ensure that the jump | |
480 | * statement after the pmove is in the cache already (otherwise the | |
481 | * processor can't fetch it!). For that, the code first jumps to the | |
482 | * jump statement with the (virtual) address of the pmove section in | |
483 | * an address register . The jump statement is surely in the cache | |
484 | * now. After that, that physical address of the reset code is loaded | |
485 | * into the same address register, pmove is done and the same jump | |
486 | * statements goes to the reset code. Since there are not many | |
487 | * statements between the two jumps, I hope it stays in the cache. | |
488 | * | |
489 | * The C code makes heavy use of the GCC features that you can get the | |
490 | * address of a C label. No hope to compile this with another compiler | |
491 | * than GCC! | |
492 | */ | |
493 | ||
494 | /* ++andreas: no need for complicated code, just depend on prefetch */ | |
495 | ||
6ff5801a | 496 | static void atari_reset(void) |
1da177e4 | 497 | { |
6ff5801a RZ |
498 | long tc_val = 0; |
499 | long reset_addr; | |
500 | ||
501 | /* | |
502 | * On the Medusa, phys. 0x4 may contain garbage because it's no | |
503 | * ROM. See above for explanation why we cannot use PTOV(4). | |
504 | */ | |
29c8a246 | 505 | reset_addr = MACH_IS_MEDUSA || MACH_IS_AB40 ? 0xe00030 : |
6ff5801a RZ |
506 | *(unsigned long *) 0xff000004; |
507 | ||
508 | /* reset ACIA for switch off OverScan, if it's active */ | |
509 | if (atari_switches & ATARI_SWITCH_OVSC_IKBD) | |
510 | acia.key_ctrl = ACIA_RESET; | |
511 | if (atari_switches & ATARI_SWITCH_OVSC_MIDI) | |
512 | acia.mid_ctrl = ACIA_RESET; | |
513 | ||
514 | /* processor independent: turn off interrupts and reset the VBR; | |
515 | * the caches must be left enabled, else prefetching the final jump | |
516 | * instruction doesn't work. | |
517 | */ | |
518 | local_irq_disable(); | |
519 | asm volatile ("movec %0,%%vbr" | |
520 | : : "d" (0)); | |
521 | ||
522 | if (CPU_IS_040_OR_060) { | |
523 | unsigned long jmp_addr040 = virt_to_phys(&&jmp_addr_label040); | |
524 | if (CPU_IS_060) { | |
525 | /* 68060: clear PCR to turn off superscalar operation */ | |
526 | asm volatile ("\n" | |
527 | " .chip 68060\n" | |
528 | " movec %0,%%pcr\n" | |
529 | " .chip 68k" | |
530 | : : "d" (0)); | |
531 | } | |
532 | ||
533 | asm volatile ("\n" | |
534 | " move.l %0,%%d0\n" | |
535 | " and.l #0xff000000,%%d0\n" | |
536 | " or.w #0xe020,%%d0\n" /* map 16 MB, enable, cacheable */ | |
537 | " .chip 68040\n" | |
538 | " movec %%d0,%%itt0\n" | |
539 | " movec %%d0,%%dtt0\n" | |
540 | " .chip 68k\n" | |
541 | " jmp %0@" | |
542 | : : "a" (jmp_addr040) | |
543 | : "d0"); | |
544 | jmp_addr_label040: | |
545 | asm volatile ("\n" | |
546 | " moveq #0,%%d0\n" | |
547 | " nop\n" | |
548 | " .chip 68040\n" | |
549 | " cinva %%bc\n" | |
550 | " nop\n" | |
551 | " pflusha\n" | |
552 | " nop\n" | |
553 | " movec %%d0,%%tc\n" | |
554 | " nop\n" | |
555 | /* the following setup of transparent translations is needed on the | |
556 | * Afterburner040 to successfully reboot. Other machines shouldn't | |
557 | * care about a different tt regs setup, they also didn't care in | |
558 | * the past that the regs weren't turned off. */ | |
559 | " move.l #0xffc000,%%d0\n" /* whole insn space cacheable */ | |
560 | " movec %%d0,%%itt0\n" | |
561 | " movec %%d0,%%itt1\n" | |
562 | " or.w #0x40,%/d0\n" /* whole data space non-cacheable/ser. */ | |
563 | " movec %%d0,%%dtt0\n" | |
564 | " movec %%d0,%%dtt1\n" | |
565 | " .chip 68k\n" | |
566 | " jmp %0@" | |
567 | : /* no outputs */ | |
568 | : "a" (reset_addr) | |
569 | : "d0"); | |
570 | } else | |
571 | asm volatile ("\n" | |
572 | " pmove %0@,%%tc\n" | |
573 | " jmp %1@" | |
574 | : /* no outputs */ | |
575 | : "a" (&tc_val), "a" (reset_addr)); | |
1da177e4 LT |
576 | } |
577 | ||
578 | ||
579 | static void atari_get_model(char *model) | |
580 | { | |
6ff5801a RZ |
581 | strcpy(model, "Atari "); |
582 | switch (atari_mch_cookie >> 16) { | |
1da177e4 | 583 | case ATARI_MCH_ST: |
6ff5801a RZ |
584 | if (ATARIHW_PRESENT(MSTE_CLK)) |
585 | strcat(model, "Mega ST"); | |
586 | else | |
587 | strcat(model, "ST"); | |
588 | break; | |
1da177e4 | 589 | case ATARI_MCH_STE: |
6ff5801a RZ |
590 | if (MACH_IS_MSTE) |
591 | strcat(model, "Mega STE"); | |
592 | else | |
593 | strcat(model, "STE"); | |
594 | break; | |
1da177e4 | 595 | case ATARI_MCH_TT: |
6ff5801a RZ |
596 | if (MACH_IS_MEDUSA) |
597 | /* Medusa has TT _MCH cookie */ | |
598 | strcat(model, "Medusa"); | |
6ff5801a RZ |
599 | else |
600 | strcat(model, "TT"); | |
601 | break; | |
1da177e4 | 602 | case ATARI_MCH_FALCON: |
6ff5801a RZ |
603 | strcat(model, "Falcon"); |
604 | if (MACH_IS_AB40) | |
605 | strcat(model, " (with Afterburner040)"); | |
606 | break; | |
1da177e4 | 607 | default: |
6ff5801a RZ |
608 | sprintf(model + strlen(model), "(unknown mach cookie 0x%lx)", |
609 | atari_mch_cookie); | |
610 | break; | |
611 | } | |
1da177e4 LT |
612 | } |
613 | ||
614 | ||
813dcf7a | 615 | static void atari_get_hardware_list(struct seq_file *m) |
1da177e4 | 616 | { |
813dcf7a | 617 | int i; |
6ff5801a RZ |
618 | |
619 | for (i = 0; i < m68k_num_memory; i++) | |
813dcf7a | 620 | seq_printf(m, "\t%3ld MB at 0x%08lx (%s)\n", |
6ff5801a RZ |
621 | m68k_memory[i].size >> 20, m68k_memory[i].addr, |
622 | (m68k_memory[i].addr & 0xff000000 ? | |
623 | "alternate RAM" : "ST-RAM")); | |
624 | ||
625 | #define ATARIHW_ANNOUNCE(name, str) \ | |
626 | if (ATARIHW_PRESENT(name)) \ | |
813dcf7a | 627 | seq_printf(m, "\t%s\n", str) |
6ff5801a | 628 | |
813dcf7a | 629 | seq_printf(m, "Detected hardware:\n"); |
6ff5801a RZ |
630 | ATARIHW_ANNOUNCE(STND_SHIFTER, "ST Shifter"); |
631 | ATARIHW_ANNOUNCE(EXTD_SHIFTER, "STe Shifter"); | |
632 | ATARIHW_ANNOUNCE(TT_SHIFTER, "TT Shifter"); | |
633 | ATARIHW_ANNOUNCE(VIDEL_SHIFTER, "Falcon Shifter"); | |
634 | ATARIHW_ANNOUNCE(YM_2149, "Programmable Sound Generator"); | |
635 | ATARIHW_ANNOUNCE(PCM_8BIT, "PCM 8 Bit Sound"); | |
636 | ATARIHW_ANNOUNCE(CODEC, "CODEC Sound"); | |
637 | ATARIHW_ANNOUNCE(TT_SCSI, "SCSI Controller NCR5380 (TT style)"); | |
638 | ATARIHW_ANNOUNCE(ST_SCSI, "SCSI Controller NCR5380 (Falcon style)"); | |
639 | ATARIHW_ANNOUNCE(ACSI, "ACSI Interface"); | |
640 | ATARIHW_ANNOUNCE(IDE, "IDE Interface"); | |
641 | ATARIHW_ANNOUNCE(FDCSPEED, "8/16 Mhz Switch for FDC"); | |
642 | ATARIHW_ANNOUNCE(ST_MFP, "Multi Function Peripheral MFP 68901"); | |
643 | ATARIHW_ANNOUNCE(TT_MFP, "Second Multi Function Peripheral MFP 68901"); | |
644 | ATARIHW_ANNOUNCE(SCC, "Serial Communications Controller SCC 8530"); | |
645 | ATARIHW_ANNOUNCE(ST_ESCC, "Extended Serial Communications Controller SCC 85230"); | |
646 | ATARIHW_ANNOUNCE(ANALOG_JOY, "Paddle Interface"); | |
647 | ATARIHW_ANNOUNCE(MICROWIRE, "MICROWIRE(tm) Interface"); | |
648 | ATARIHW_ANNOUNCE(STND_DMA, "DMA Controller (24 bit)"); | |
649 | ATARIHW_ANNOUNCE(EXTD_DMA, "DMA Controller (32 bit)"); | |
650 | ATARIHW_ANNOUNCE(SCSI_DMA, "DMA Controller for NCR5380"); | |
651 | ATARIHW_ANNOUNCE(SCC_DMA, "DMA Controller for SCC"); | |
652 | ATARIHW_ANNOUNCE(TT_CLK, "Clock Chip MC146818A"); | |
653 | ATARIHW_ANNOUNCE(MSTE_CLK, "Clock Chip RP5C15"); | |
654 | ATARIHW_ANNOUNCE(SCU, "System Control Unit"); | |
655 | ATARIHW_ANNOUNCE(BLITTER, "Blitter"); | |
656 | ATARIHW_ANNOUNCE(VME, "VME Bus"); | |
657 | ATARIHW_ANNOUNCE(DSP56K, "DSP56001 processor"); | |
1da177e4 | 658 | } |