blob: e40e5dcaa347ab3d0e87dab1a99e0d86d846e479 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#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>
34
35#include <asm/bootinfo.h>
36#include <asm/setup.h>
37#include <asm/atarihw.h>
38#include <asm/atariints.h>
39#include <asm/atari_stram.h>
40#include <asm/system.h>
41#include <asm/machdep.h>
42#include <asm/hwtest.h>
43#include <asm/io.h>
44
45u_long atari_mch_cookie;
46u_long atari_mch_type;
47struct atari_hw_present atari_hw_present;
48u_long atari_switches;
49int atari_dont_touch_floppy_select;
50int atari_rtc_year_offset;
51
52/* local function prototypes */
Roman Zippel6ff58012007-05-01 22:32:43 +020053static void atari_reset(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054static void atari_get_model(char *model);
55static int atari_get_hardware_list(char *buffer);
56
57/* atari specific irq functions */
58extern void atari_init_IRQ (void);
Roman Zippel6ff58012007-05-01 22:32:43 +020059extern void atari_mksound(unsigned int count, unsigned int ticks);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#ifdef CONFIG_HEARTBEAT
Roman Zippel6ff58012007-05-01 22:32:43 +020061static void atari_heartbeat(int on);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#endif
63
64/* atari specific timer functions (in time.c) */
Roman Zippel6ff58012007-05-01 22:32:43 +020065extern void atari_sched_init(irq_handler_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066extern unsigned long atari_gettimeoffset (void);
67extern int atari_mste_hwclk (int, struct rtc_time *);
68extern int atari_tt_hwclk (int, struct rtc_time *);
69extern int atari_mste_set_clock_mmss (unsigned long);
70extern int atari_tt_set_clock_mmss (unsigned long);
71
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Linus Torvalds1da177e2005-04-16 15:20:36 -070073/* ++roman: This is a more elaborate test for an SCC chip, since the plain
74 * Medusa board generates DTACK at the SCC's standard addresses, but a SCC
75 * board in the Medusa is possible. Also, the addresses where the ST_ESCC
76 * resides generate DTACK without the chip, too.
77 * The method is to write values into the interrupt vector register, that
78 * should be readable without trouble (from channel A!).
79 */
80
Roman Zippel6ff58012007-05-01 22:32:43 +020081static int __init scc_test(volatile char *ctla)
Linus Torvalds1da177e2005-04-16 15:20:36 -070082{
Roman Zippel6ff58012007-05-01 22:32:43 +020083 if (!hwreg_present(ctla))
84 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 MFPDELAY();
86
Roman Zippel6ff58012007-05-01 22:32:43 +020087 *ctla = 2;
88 MFPDELAY();
89 *ctla = 0x40;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 MFPDELAY();
91
Roman Zippel6ff58012007-05-01 22:32:43 +020092 *ctla = 2;
93 MFPDELAY();
94 if (*ctla != 0x40)
95 return 0;
96 MFPDELAY();
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Roman Zippel6ff58012007-05-01 22:32:43 +020098 *ctla = 2;
99 MFPDELAY();
100 *ctla = 0x60;
101 MFPDELAY();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Roman Zippel6ff58012007-05-01 22:32:43 +0200103 *ctla = 2;
104 MFPDELAY();
105 if (*ctla != 0x60)
106 return 0;
107
108 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109}
110
111
112 /*
113 * Parse an Atari-specific record in the bootinfo
114 */
115
116int __init atari_parse_bootinfo(const struct bi_record *record)
117{
Roman Zippel6ff58012007-05-01 22:32:43 +0200118 int unknown = 0;
119 const u_long *data = record->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Roman Zippel6ff58012007-05-01 22:32:43 +0200121 switch (record->tag) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 case BI_ATARI_MCH_COOKIE:
Roman Zippel6ff58012007-05-01 22:32:43 +0200123 atari_mch_cookie = *data;
124 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 case BI_ATARI_MCH_TYPE:
Roman Zippel6ff58012007-05-01 22:32:43 +0200126 atari_mch_type = *data;
127 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 default:
Roman Zippel6ff58012007-05-01 22:32:43 +0200129 unknown = 1;
130 break;
131 }
132 return unknown;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133}
134
135
136/* Parse the Atari-specific switches= option. */
Roman Zippeld6713b42007-05-01 22:32:45 +0200137static int __init atari_switches_setup(char *str)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138{
Roman Zippeld6713b42007-05-01 22:32:45 +0200139 char switches[strlen(str) + 1];
Roman Zippel6ff58012007-05-01 22:32:43 +0200140 char *p;
141 int ovsc_shift;
142 char *args = switches;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
Roman Zippeld6713b42007-05-01 22:32:45 +0200144 if (!MACH_IS_ATARI)
145 return 0;
146
Roman Zippel6ff58012007-05-01 22:32:43 +0200147 /* copy string to local array, strsep works destructively... */
Roman Zippeld6713b42007-05-01 22:32:45 +0200148 strcpy(switches, str);
Roman Zippel6ff58012007-05-01 22:32:43 +0200149 atari_switches = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Roman Zippel6ff58012007-05-01 22:32:43 +0200151 /* parse the options */
152 while ((p = strsep(&args, ",")) != NULL) {
153 if (!*p)
154 continue;
155 ovsc_shift = 0;
156 if (strncmp(p, "ov_", 3) == 0) {
157 p += 3;
158 ovsc_shift = ATARI_SWITCH_OVSC_SHIFT;
159 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Roman Zippel6ff58012007-05-01 22:32:43 +0200161 if (strcmp(p, "ikbd") == 0) {
162 /* RTS line of IKBD ACIA */
163 atari_switches |= ATARI_SWITCH_IKBD << ovsc_shift;
164 } else if (strcmp(p, "midi") == 0) {
165 /* RTS line of MIDI ACIA */
166 atari_switches |= ATARI_SWITCH_MIDI << ovsc_shift;
167 } else if (strcmp(p, "snd6") == 0) {
168 atari_switches |= ATARI_SWITCH_SND6 << ovsc_shift;
169 } else if (strcmp(p, "snd7") == 0) {
170 atari_switches |= ATARI_SWITCH_SND7 << ovsc_shift;
171 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 }
Roman Zippeld6713b42007-05-01 22:32:45 +0200173 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174}
175
Roman Zippeld6713b42007-05-01 22:32:45 +0200176early_param("switches", atari_switches_setup);
177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
179 /*
180 * Setup the Atari configuration info
181 */
182
183void __init config_atari(void)
184{
Roman Zippel6ff58012007-05-01 22:32:43 +0200185 unsigned short tos_version;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Roman Zippel6ff58012007-05-01 22:32:43 +0200187 memset(&atari_hw_present, 0, sizeof(atari_hw_present));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Roman Zippel6ff58012007-05-01 22:32:43 +0200189 /* Change size of I/O space from 64KB to 4GB. */
190 ioport_resource.end = 0xFFFFFFFF;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Roman Zippel6ff58012007-05-01 22:32:43 +0200192 mach_sched_init = atari_sched_init;
193 mach_init_IRQ = atari_init_IRQ;
194 mach_get_model = atari_get_model;
195 mach_get_hardware_list = atari_get_hardware_list;
196 mach_gettimeoffset = atari_gettimeoffset;
197 mach_reset = atari_reset;
198 mach_max_dma_address = 0xffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
Roman Zippel6ff58012007-05-01 22:32:43 +0200200 mach_beep = atari_mksound;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201#endif
202#ifdef CONFIG_HEARTBEAT
Roman Zippel6ff58012007-05-01 22:32:43 +0200203 mach_heartbeat = atari_heartbeat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204#endif
205
Roman Zippel6ff58012007-05-01 22:32:43 +0200206 /* Set switches as requested by the user */
207 if (atari_switches & ATARI_SWITCH_IKBD)
208 acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID;
209 if (atari_switches & ATARI_SWITCH_MIDI)
210 acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
211 if (atari_switches & (ATARI_SWITCH_SND6|ATARI_SWITCH_SND7)) {
212 sound_ym.rd_data_reg_sel = 14;
213 sound_ym.wd_data = sound_ym.rd_data_reg_sel |
214 ((atari_switches&ATARI_SWITCH_SND6) ? 0x40 : 0) |
215 ((atari_switches&ATARI_SWITCH_SND7) ? 0x80 : 0);
216 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
Roman Zippel6ff58012007-05-01 22:32:43 +0200218 /* ++bjoern:
219 * Determine hardware present
220 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
Roman Zippel6ff58012007-05-01 22:32:43 +0200222 printk("Atari hardware found: ");
223 if (MACH_IS_MEDUSA || MACH_IS_HADES) {
224 /* There's no Atari video hardware on the Medusa, but all the
225 * addresses below generate a DTACK so no bus error occurs! */
226 } else if (hwreg_present(f030_xreg)) {
227 ATARIHW_SET(VIDEL_SHIFTER);
228 printk("VIDEL ");
229 /* This is a temporary hack: If there is Falcon video
230 * hardware, we assume that the ST-DMA serves SCSI instead of
231 * ACSI. In the future, there should be a better method for
232 * this...
233 */
234 ATARIHW_SET(ST_SCSI);
235 printk("STDMA-SCSI ");
236 } else if (hwreg_present(tt_palette)) {
237 ATARIHW_SET(TT_SHIFTER);
238 printk("TT_SHIFTER ");
239 } else if (hwreg_present(&shifter.bas_hi)) {
240 if (hwreg_present(&shifter.bas_lo) &&
241 (shifter.bas_lo = 0x0aau, shifter.bas_lo == 0x0aau)) {
242 ATARIHW_SET(EXTD_SHIFTER);
243 printk("EXTD_SHIFTER ");
244 } else {
245 ATARIHW_SET(STND_SHIFTER);
246 printk("STND_SHIFTER ");
247 }
248 }
249 if (hwreg_present(&mfp.par_dt_reg)) {
250 ATARIHW_SET(ST_MFP);
251 printk("ST_MFP ");
252 }
253 if (hwreg_present(&tt_mfp.par_dt_reg)) {
254 ATARIHW_SET(TT_MFP);
255 printk("TT_MFP ");
256 }
257 if (hwreg_present(&tt_scsi_dma.dma_addr_hi)) {
258 ATARIHW_SET(SCSI_DMA);
259 printk("TT_SCSI_DMA ");
260 }
261 if (!MACH_IS_HADES && hwreg_present(&st_dma.dma_hi)) {
262 ATARIHW_SET(STND_DMA);
263 printk("STND_DMA ");
264 }
265 /*
266 * The ST-DMA address registers aren't readable
267 * on all Medusas, so the test below may fail
268 */
269 if (MACH_IS_MEDUSA ||
270 (hwreg_present(&st_dma.dma_vhi) &&
271 (st_dma.dma_vhi = 0x55) && (st_dma.dma_hi = 0xaa) &&
272 st_dma.dma_vhi == 0x55 && st_dma.dma_hi == 0xaa &&
273 (st_dma.dma_vhi = 0xaa) && (st_dma.dma_hi = 0x55) &&
274 st_dma.dma_vhi == 0xaa && st_dma.dma_hi == 0x55)) {
275 ATARIHW_SET(EXTD_DMA);
276 printk("EXTD_DMA ");
277 }
278 if (hwreg_present(&tt_scsi.scsi_data)) {
279 ATARIHW_SET(TT_SCSI);
280 printk("TT_SCSI ");
281 }
282 if (hwreg_present(&sound_ym.rd_data_reg_sel)) {
283 ATARIHW_SET(YM_2149);
284 printk("YM2149 ");
285 }
286 if (!MACH_IS_MEDUSA && !MACH_IS_HADES &&
287 hwreg_present(&tt_dmasnd.ctrl)) {
288 ATARIHW_SET(PCM_8BIT);
289 printk("PCM ");
290 }
291 if (!MACH_IS_HADES && hwreg_present(&falcon_codec.unused5)) {
292 ATARIHW_SET(CODEC);
293 printk("CODEC ");
294 }
295 if (hwreg_present(&dsp56k_host_interface.icr)) {
296 ATARIHW_SET(DSP56K);
297 printk("DSP56K ");
298 }
299 if (hwreg_present(&tt_scc_dma.dma_ctrl) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300#if 0
Roman Zippel6ff58012007-05-01 22:32:43 +0200301 /* This test sucks! Who knows some better? */
302 (tt_scc_dma.dma_ctrl = 0x01, (tt_scc_dma.dma_ctrl & 1) == 1) &&
303 (tt_scc_dma.dma_ctrl = 0x00, (tt_scc_dma.dma_ctrl & 1) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304#else
Roman Zippel6ff58012007-05-01 22:32:43 +0200305 !MACH_IS_MEDUSA && !MACH_IS_HADES
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306#endif
Roman Zippel6ff58012007-05-01 22:32:43 +0200307 ) {
308 ATARIHW_SET(SCC_DMA);
309 printk("SCC_DMA ");
310 }
311 if (scc_test(&scc.cha_a_ctrl)) {
312 ATARIHW_SET(SCC);
313 printk("SCC ");
314 }
315 if (scc_test(&st_escc.cha_b_ctrl)) {
316 ATARIHW_SET(ST_ESCC);
317 printk("ST_ESCC ");
318 }
319 if (MACH_IS_HADES) {
320 ATARIHW_SET(VME);
321 printk("VME ");
322 } else if (hwreg_present(&tt_scu.sys_mask)) {
323 ATARIHW_SET(SCU);
324 /* Assume a VME bus if there's a SCU */
325 ATARIHW_SET(VME);
326 printk("VME SCU ");
327 }
328 if (hwreg_present((void *)(0xffff9210))) {
329 ATARIHW_SET(ANALOG_JOY);
330 printk("ANALOG_JOY ");
331 }
332 if (!MACH_IS_HADES && hwreg_present(blitter.halftone)) {
333 ATARIHW_SET(BLITTER);
334 printk("BLITTER ");
335 }
336 if (hwreg_present((void *)0xfff00039)) {
337 ATARIHW_SET(IDE);
338 printk("IDE ");
339 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340#if 1 /* This maybe wrong */
Roman Zippel6ff58012007-05-01 22:32:43 +0200341 if (!MACH_IS_MEDUSA && !MACH_IS_HADES &&
342 hwreg_present(&tt_microwire.data) &&
343 hwreg_present(&tt_microwire.mask) &&
344 (tt_microwire.mask = 0x7ff,
345 udelay(1),
346 tt_microwire.data = MW_LM1992_PSG_HIGH | MW_LM1992_ADDR,
347 udelay(1),
348 tt_microwire.data != 0)) {
349 ATARIHW_SET(MICROWIRE);
350 while (tt_microwire.mask != 0x7ff)
351 ;
352 printk("MICROWIRE ");
353 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354#endif
Roman Zippel6ff58012007-05-01 22:32:43 +0200355 if (hwreg_present(&tt_rtc.regsel)) {
356 ATARIHW_SET(TT_CLK);
357 printk("TT_CLK ");
358 mach_hwclk = atari_tt_hwclk;
359 mach_set_clock_mmss = atari_tt_set_clock_mmss;
360 }
361 if (!MACH_IS_HADES && hwreg_present(&mste_rtc.sec_ones)) {
362 ATARIHW_SET(MSTE_CLK);
363 printk("MSTE_CLK ");
364 mach_hwclk = atari_mste_hwclk;
365 mach_set_clock_mmss = atari_mste_set_clock_mmss;
366 }
367 if (!MACH_IS_MEDUSA && !MACH_IS_HADES &&
368 hwreg_present(&dma_wd.fdc_speed) &&
369 hwreg_write(&dma_wd.fdc_speed, 0)) {
370 ATARIHW_SET(FDCSPEED);
371 printk("FDC_SPEED ");
372 }
373 if (!MACH_IS_HADES && !ATARIHW_PRESENT(ST_SCSI)) {
374 ATARIHW_SET(ACSI);
375 printk("ACSI ");
376 }
377 printk("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Roman Zippel6ff58012007-05-01 22:32:43 +0200379 if (CPU_IS_040_OR_060)
380 /* Now it seems to be safe to turn of the tt0 transparent
381 * translation (the one that must not be turned off in
382 * head.S...)
383 */
384 asm volatile ("\n"
385 " moveq #0,%%d0\n"
386 " .chip 68040\n"
387 " movec %%d0,%%itt0\n"
388 " movec %%d0,%%dtt0\n"
389 " .chip 68k"
390 : /* no outputs */
391 : /* no inputs */
392 : "d0");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
Roman Zippel6ff58012007-05-01 22:32:43 +0200394 /* allocator for memory that must reside in st-ram */
395 atari_stram_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
Roman Zippel6ff58012007-05-01 22:32:43 +0200397 /* Set up a mapping for the VMEbus address region:
398 *
399 * VME is either at phys. 0xfexxxxxx (TT) or 0xa00000..0xdfffff
400 * (MegaSTE) In both cases, the whole 16 MB chunk is mapped at
401 * 0xfe000000 virt., because this can be done with a single
402 * transparent translation. On the 68040, lots of often unused
403 * page tables would be needed otherwise. On a MegaSTE or similar,
404 * the highest byte is stripped off by hardware due to the 24 bit
405 * design of the bus.
406 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407
Roman Zippel6ff58012007-05-01 22:32:43 +0200408 if (CPU_IS_020_OR_030) {
409 unsigned long tt1_val;
410 tt1_val = 0xfe008543; /* Translate 0xfexxxxxx, enable, cache
411 * inhibit, read and write, FDC mask = 3,
412 * FDC val = 4 -> Supervisor only */
413 asm volatile ("\n"
414 " .chip 68030\n"
415 " pmove %0@,%/tt1\n"
416 " .chip 68k"
417 : : "a" (&tt1_val));
418 } else {
419 asm volatile ("\n"
420 " .chip 68040\n"
421 " movec %0,%%itt1\n"
422 " movec %0,%%dtt1\n"
423 " .chip 68k"
424 :
425 : "d" (0xfe00a040)); /* Translate 0xfexxxxxx, enable,
426 * supervisor only, non-cacheable/
427 * serialized, writable */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Roman Zippel6ff58012007-05-01 22:32:43 +0200429 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
Roman Zippel6ff58012007-05-01 22:32:43 +0200431 /* Fetch tos version at Physical 2 */
432 /*
433 * We my not be able to access this address if the kernel is
434 * loaded to st ram, since the first page is unmapped. On the
435 * Medusa this is always the case and there is nothing we can do
436 * about this, so we just assume the smaller offset. For the TT
437 * we use the fact that in head.S we have set up a mapping
438 * 0xFFxxxxxx -> 0x00xxxxxx, so that the first 16MB is accessible
439 * in the last 16MB of the address space.
440 */
441 tos_version = (MACH_IS_MEDUSA || MACH_IS_HADES) ?
442 0xfff : *(unsigned short *)0xff000002;
443 atari_rtc_year_offset = (tos_version < 0x306) ? 70 : 68;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444}
445
446#ifdef CONFIG_HEARTBEAT
Roman Zippel6ff58012007-05-01 22:32:43 +0200447static void atari_heartbeat(int on)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448{
Roman Zippel6ff58012007-05-01 22:32:43 +0200449 unsigned char tmp;
450 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
Roman Zippel6ff58012007-05-01 22:32:43 +0200452 if (atari_dont_touch_floppy_select)
453 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
Roman Zippel6ff58012007-05-01 22:32:43 +0200455 local_irq_save(flags);
456 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
457 tmp = sound_ym.rd_data_reg_sel;
458 sound_ym.wd_data = on ? (tmp & ~0x02) : (tmp | 0x02);
459 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460}
461#endif
462
463/* ++roman:
464 *
465 * This function does a reset on machines that lack the ability to
466 * assert the processor's _RESET signal somehow via hardware. It is
467 * based on the fact that you can find the initial SP and PC values
468 * after a reset at physical addresses 0 and 4. This works pretty well
469 * for Atari machines, since the lowest 8 bytes of physical memory are
470 * really ROM (mapped by hardware). For other 680x0 machines: don't
471 * know if it works...
472 *
473 * To get the values at addresses 0 and 4, the MMU better is turned
474 * off first. After that, we have to jump into physical address space
475 * (the PC before the pmove statement points to the virtual address of
476 * the code). Getting that physical address is not hard, but the code
477 * becomes a bit complex since I've tried to ensure that the jump
478 * statement after the pmove is in the cache already (otherwise the
479 * processor can't fetch it!). For that, the code first jumps to the
480 * jump statement with the (virtual) address of the pmove section in
481 * an address register . The jump statement is surely in the cache
482 * now. After that, that physical address of the reset code is loaded
483 * into the same address register, pmove is done and the same jump
484 * statements goes to the reset code. Since there are not many
485 * statements between the two jumps, I hope it stays in the cache.
486 *
487 * The C code makes heavy use of the GCC features that you can get the
488 * address of a C label. No hope to compile this with another compiler
489 * than GCC!
490 */
491
492/* ++andreas: no need for complicated code, just depend on prefetch */
493
Roman Zippel6ff58012007-05-01 22:32:43 +0200494static void atari_reset(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495{
Roman Zippel6ff58012007-05-01 22:32:43 +0200496 long tc_val = 0;
497 long reset_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
Roman Zippel6ff58012007-05-01 22:32:43 +0200499 /*
500 * On the Medusa, phys. 0x4 may contain garbage because it's no
501 * ROM. See above for explanation why we cannot use PTOV(4).
502 */
503 reset_addr = MACH_IS_HADES ? 0x7fe00030 :
504 MACH_IS_MEDUSA || MACH_IS_AB40 ? 0xe00030 :
505 *(unsigned long *) 0xff000004;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506
Roman Zippel6ff58012007-05-01 22:32:43 +0200507 /* reset ACIA for switch off OverScan, if it's active */
508 if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
509 acia.key_ctrl = ACIA_RESET;
510 if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
511 acia.mid_ctrl = ACIA_RESET;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
Roman Zippel6ff58012007-05-01 22:32:43 +0200513 /* processor independent: turn off interrupts and reset the VBR;
514 * the caches must be left enabled, else prefetching the final jump
515 * instruction doesn't work.
516 */
517 local_irq_disable();
518 asm volatile ("movec %0,%%vbr"
519 : : "d" (0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
Roman Zippel6ff58012007-05-01 22:32:43 +0200521 if (CPU_IS_040_OR_060) {
522 unsigned long jmp_addr040 = virt_to_phys(&&jmp_addr_label040);
523 if (CPU_IS_060) {
524 /* 68060: clear PCR to turn off superscalar operation */
525 asm volatile ("\n"
526 " .chip 68060\n"
527 " movec %0,%%pcr\n"
528 " .chip 68k"
529 : : "d" (0));
530 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
Roman Zippel6ff58012007-05-01 22:32:43 +0200532 asm volatile ("\n"
533 " move.l %0,%%d0\n"
534 " and.l #0xff000000,%%d0\n"
535 " or.w #0xe020,%%d0\n" /* map 16 MB, enable, cacheable */
536 " .chip 68040\n"
537 " movec %%d0,%%itt0\n"
538 " movec %%d0,%%dtt0\n"
539 " .chip 68k\n"
540 " jmp %0@"
541 : : "a" (jmp_addr040)
542 : "d0");
543 jmp_addr_label040:
544 asm volatile ("\n"
545 " moveq #0,%%d0\n"
546 " nop\n"
547 " .chip 68040\n"
548 " cinva %%bc\n"
549 " nop\n"
550 " pflusha\n"
551 " nop\n"
552 " movec %%d0,%%tc\n"
553 " nop\n"
554 /* the following setup of transparent translations is needed on the
555 * Afterburner040 to successfully reboot. Other machines shouldn't
556 * care about a different tt regs setup, they also didn't care in
557 * the past that the regs weren't turned off. */
558 " move.l #0xffc000,%%d0\n" /* whole insn space cacheable */
559 " movec %%d0,%%itt0\n"
560 " movec %%d0,%%itt1\n"
561 " or.w #0x40,%/d0\n" /* whole data space non-cacheable/ser. */
562 " movec %%d0,%%dtt0\n"
563 " movec %%d0,%%dtt1\n"
564 " .chip 68k\n"
565 " jmp %0@"
566 : /* no outputs */
567 : "a" (reset_addr)
568 : "d0");
569 } else
570 asm volatile ("\n"
571 " pmove %0@,%%tc\n"
572 " jmp %1@"
573 : /* no outputs */
574 : "a" (&tc_val), "a" (reset_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575}
576
577
578static void atari_get_model(char *model)
579{
Roman Zippel6ff58012007-05-01 22:32:43 +0200580 strcpy(model, "Atari ");
581 switch (atari_mch_cookie >> 16) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 case ATARI_MCH_ST:
Roman Zippel6ff58012007-05-01 22:32:43 +0200583 if (ATARIHW_PRESENT(MSTE_CLK))
584 strcat(model, "Mega ST");
585 else
586 strcat(model, "ST");
587 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 case ATARI_MCH_STE:
Roman Zippel6ff58012007-05-01 22:32:43 +0200589 if (MACH_IS_MSTE)
590 strcat(model, "Mega STE");
591 else
592 strcat(model, "STE");
593 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 case ATARI_MCH_TT:
Roman Zippel6ff58012007-05-01 22:32:43 +0200595 if (MACH_IS_MEDUSA)
596 /* Medusa has TT _MCH cookie */
597 strcat(model, "Medusa");
598 else if (MACH_IS_HADES)
599 strcat(model, "Hades");
600 else
601 strcat(model, "TT");
602 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 case ATARI_MCH_FALCON:
Roman Zippel6ff58012007-05-01 22:32:43 +0200604 strcat(model, "Falcon");
605 if (MACH_IS_AB40)
606 strcat(model, " (with Afterburner040)");
607 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 default:
Roman Zippel6ff58012007-05-01 22:32:43 +0200609 sprintf(model + strlen(model), "(unknown mach cookie 0x%lx)",
610 atari_mch_cookie);
611 break;
612 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613}
614
615
616static int atari_get_hardware_list(char *buffer)
617{
Roman Zippel6ff58012007-05-01 22:32:43 +0200618 int len = 0, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
Roman Zippel6ff58012007-05-01 22:32:43 +0200620 for (i = 0; i < m68k_num_memory; i++)
621 len += sprintf(buffer+len, "\t%3ld MB at 0x%08lx (%s)\n",
622 m68k_memory[i].size >> 20, m68k_memory[i].addr,
623 (m68k_memory[i].addr & 0xff000000 ?
624 "alternate RAM" : "ST-RAM"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
Roman Zippel6ff58012007-05-01 22:32:43 +0200626#define ATARIHW_ANNOUNCE(name, str) \
627 if (ATARIHW_PRESENT(name)) \
628 len += sprintf(buffer + len, "\t%s\n", str)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
Roman Zippel6ff58012007-05-01 22:32:43 +0200630 len += sprintf(buffer + len, "Detected hardware:\n");
631 ATARIHW_ANNOUNCE(STND_SHIFTER, "ST Shifter");
632 ATARIHW_ANNOUNCE(EXTD_SHIFTER, "STe Shifter");
633 ATARIHW_ANNOUNCE(TT_SHIFTER, "TT Shifter");
634 ATARIHW_ANNOUNCE(VIDEL_SHIFTER, "Falcon Shifter");
635 ATARIHW_ANNOUNCE(YM_2149, "Programmable Sound Generator");
636 ATARIHW_ANNOUNCE(PCM_8BIT, "PCM 8 Bit Sound");
637 ATARIHW_ANNOUNCE(CODEC, "CODEC Sound");
638 ATARIHW_ANNOUNCE(TT_SCSI, "SCSI Controller NCR5380 (TT style)");
639 ATARIHW_ANNOUNCE(ST_SCSI, "SCSI Controller NCR5380 (Falcon style)");
640 ATARIHW_ANNOUNCE(ACSI, "ACSI Interface");
641 ATARIHW_ANNOUNCE(IDE, "IDE Interface");
642 ATARIHW_ANNOUNCE(FDCSPEED, "8/16 Mhz Switch for FDC");
643 ATARIHW_ANNOUNCE(ST_MFP, "Multi Function Peripheral MFP 68901");
644 ATARIHW_ANNOUNCE(TT_MFP, "Second Multi Function Peripheral MFP 68901");
645 ATARIHW_ANNOUNCE(SCC, "Serial Communications Controller SCC 8530");
646 ATARIHW_ANNOUNCE(ST_ESCC, "Extended Serial Communications Controller SCC 85230");
647 ATARIHW_ANNOUNCE(ANALOG_JOY, "Paddle Interface");
648 ATARIHW_ANNOUNCE(MICROWIRE, "MICROWIRE(tm) Interface");
649 ATARIHW_ANNOUNCE(STND_DMA, "DMA Controller (24 bit)");
650 ATARIHW_ANNOUNCE(EXTD_DMA, "DMA Controller (32 bit)");
651 ATARIHW_ANNOUNCE(SCSI_DMA, "DMA Controller for NCR5380");
652 ATARIHW_ANNOUNCE(SCC_DMA, "DMA Controller for SCC");
653 ATARIHW_ANNOUNCE(TT_CLK, "Clock Chip MC146818A");
654 ATARIHW_ANNOUNCE(MSTE_CLK, "Clock Chip RP5C15");
655 ATARIHW_ANNOUNCE(SCU, "System Control Unit");
656 ATARIHW_ANNOUNCE(BLITTER, "Blitter");
657 ATARIHW_ANNOUNCE(VME, "VME Bus");
658 ATARIHW_ANNOUNCE(DSP56K, "DSP56001 processor");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659
Roman Zippel6ff58012007-05-01 22:32:43 +0200660 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661}