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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68k/kernel/setup.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/m68k/kernel/setup.c')
-rw-r--r--arch/m68k/kernel/setup.c545
1 files changed, 545 insertions, 0 deletions
diff --git a/arch/m68k/kernel/setup.c b/arch/m68k/kernel/setup.c
new file mode 100644
index 000000000000..d6ca99242e5a
--- /dev/null
+++ b/arch/m68k/kernel/setup.c
@@ -0,0 +1,545 @@
1/*
2 * linux/arch/m68k/kernel/setup.c
3 *
4 * Copyright (C) 1995 Hamish Macdonald
5 */
6
7/*
8 * This file handles the architecture-dependent parts of system setup
9 */
10
11#include <linux/config.h>
12#include <linux/kernel.h>
13#include <linux/mm.h>
14#include <linux/sched.h>
15#include <linux/delay.h>
16#include <linux/interrupt.h>
17#include <linux/fs.h>
18#include <linux/console.h>
19#include <linux/genhd.h>
20#include <linux/errno.h>
21#include <linux/string.h>
22#include <linux/init.h>
23#include <linux/bootmem.h>
24#include <linux/seq_file.h>
25#include <linux/module.h>
26#include <linux/initrd.h>
27
28#include <asm/bootinfo.h>
29#include <asm/setup.h>
30#include <asm/irq.h>
31#include <asm/io.h>
32#include <asm/machdep.h>
33#ifdef CONFIG_AMIGA
34#include <asm/amigahw.h>
35#endif
36#ifdef CONFIG_ATARI
37#include <asm/atarihw.h>
38#include <asm/atari_stram.h>
39#endif
40#ifdef CONFIG_SUN3X
41#include <asm/dvma.h>
42#endif
43
44unsigned long m68k_machtype;
45unsigned long m68k_cputype;
46unsigned long m68k_fputype;
47unsigned long m68k_mmutype;
48#ifdef CONFIG_VME
49unsigned long vme_brdtype;
50#endif
51
52int m68k_is040or060;
53
54extern int end;
55extern unsigned long availmem;
56
57int m68k_num_memory;
58int m68k_realnum_memory;
59unsigned long m68k_memoffset;
60struct mem_info m68k_memory[NUM_MEMINFO];
61
62static struct mem_info m68k_ramdisk;
63
64static char m68k_command_line[CL_SIZE];
65
66char m68k_debug_device[6] = "";
67
68void (*mach_sched_init) (irqreturn_t (*handler)(int, void *, struct pt_regs *)) __initdata = NULL;
69/* machine dependent irq functions */
70void (*mach_init_IRQ) (void) __initdata = NULL;
71irqreturn_t (*(*mach_default_handler)[]) (int, void *, struct pt_regs *);
72void (*mach_get_model) (char *model);
73int (*mach_get_hardware_list) (char *buffer);
74int (*mach_get_irq_list) (struct seq_file *, void *);
75irqreturn_t (*mach_process_int) (int, struct pt_regs *);
76/* machine dependent timer functions */
77unsigned long (*mach_gettimeoffset) (void);
78int (*mach_hwclk) (int, struct rtc_time*);
79int (*mach_set_clock_mmss) (unsigned long);
80unsigned int (*mach_get_ss)(void);
81int (*mach_get_rtc_pll)(struct rtc_pll_info *);
82int (*mach_set_rtc_pll)(struct rtc_pll_info *);
83void (*mach_reset)( void );
84void (*mach_halt)( void );
85void (*mach_power_off)( void );
86long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
87#if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
88void (*mach_floppy_setup) (char *, int *) __initdata = NULL;
89#endif
90#ifdef CONFIG_HEARTBEAT
91void (*mach_heartbeat) (int);
92EXPORT_SYMBOL(mach_heartbeat);
93#endif
94#ifdef CONFIG_M68K_L2_CACHE
95void (*mach_l2_flush) (int);
96#endif
97#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
98void (*mach_beep)(unsigned int, unsigned int);
99#endif
100#if defined(CONFIG_ISA) && defined(MULTI_ISA)
101int isa_type;
102int isa_sex;
103#endif
104
105extern int amiga_parse_bootinfo(const struct bi_record *);
106extern int atari_parse_bootinfo(const struct bi_record *);
107extern int mac_parse_bootinfo(const struct bi_record *);
108extern int q40_parse_bootinfo(const struct bi_record *);
109extern int bvme6000_parse_bootinfo(const struct bi_record *);
110extern int mvme16x_parse_bootinfo(const struct bi_record *);
111extern int mvme147_parse_bootinfo(const struct bi_record *);
112extern int hp300_parse_bootinfo(const struct bi_record *);
113
114extern void config_amiga(void);
115extern void config_atari(void);
116extern void config_mac(void);
117extern void config_sun3(void);
118extern void config_apollo(void);
119extern void config_mvme147(void);
120extern void config_mvme16x(void);
121extern void config_bvme6000(void);
122extern void config_hp300(void);
123extern void config_q40(void);
124extern void config_sun3x(void);
125
126extern void mac_debugging_short (int, short);
127extern void mac_debugging_long (int, long);
128
129#define MASK_256K 0xfffc0000
130
131extern void paging_init(void);
132
133static void __init m68k_parse_bootinfo(const struct bi_record *record)
134{
135 while (record->tag != BI_LAST) {
136 int unknown = 0;
137 const unsigned long *data = record->data;
138 switch (record->tag) {
139 case BI_MACHTYPE:
140 case BI_CPUTYPE:
141 case BI_FPUTYPE:
142 case BI_MMUTYPE:
143 /* Already set up by head.S */
144 break;
145
146 case BI_MEMCHUNK:
147 if (m68k_num_memory < NUM_MEMINFO) {
148 m68k_memory[m68k_num_memory].addr = data[0];
149 m68k_memory[m68k_num_memory].size = data[1];
150 m68k_num_memory++;
151 } else
152 printk("m68k_parse_bootinfo: too many memory chunks\n");
153 break;
154
155 case BI_RAMDISK:
156 m68k_ramdisk.addr = data[0];
157 m68k_ramdisk.size = data[1];
158 break;
159
160 case BI_COMMAND_LINE:
161 strlcpy(m68k_command_line, (const char *)data, sizeof(m68k_command_line));
162 break;
163
164 default:
165 if (MACH_IS_AMIGA)
166 unknown = amiga_parse_bootinfo(record);
167 else if (MACH_IS_ATARI)
168 unknown = atari_parse_bootinfo(record);
169 else if (MACH_IS_MAC)
170 unknown = mac_parse_bootinfo(record);
171 else if (MACH_IS_Q40)
172 unknown = q40_parse_bootinfo(record);
173 else if (MACH_IS_BVME6000)
174 unknown = bvme6000_parse_bootinfo(record);
175 else if (MACH_IS_MVME16x)
176 unknown = mvme16x_parse_bootinfo(record);
177 else if (MACH_IS_MVME147)
178 unknown = mvme147_parse_bootinfo(record);
179 else if (MACH_IS_HP300)
180 unknown = hp300_parse_bootinfo(record);
181 else
182 unknown = 1;
183 }
184 if (unknown)
185 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
186 record->tag);
187 record = (struct bi_record *)((unsigned long)record+record->size);
188 }
189
190 m68k_realnum_memory = m68k_num_memory;
191#ifdef CONFIG_SINGLE_MEMORY_CHUNK
192 if (m68k_num_memory > 1) {
193 printk("Ignoring last %i chunks of physical memory\n",
194 (m68k_num_memory - 1));
195 m68k_num_memory = 1;
196 }
197 m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
198#endif
199}
200
201void __init setup_arch(char **cmdline_p)
202{
203 extern int _etext, _edata, _end;
204#ifndef CONFIG_SUN3
205 unsigned long endmem, startmem;
206#endif
207 int i;
208 char *p, *q;
209
210 /* The bootinfo is located right after the kernel bss */
211 m68k_parse_bootinfo((const struct bi_record *)&_end);
212
213 if (CPU_IS_040)
214 m68k_is040or060 = 4;
215 else if (CPU_IS_060)
216 m68k_is040or060 = 6;
217
218 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
219 * be confused by software FPU emulation. BEWARE.
220 * We should really do our own FPU check at startup.
221 * [what do we do with buggy 68LC040s? if we have problems
222 * with them, we should add a test to check_bugs() below] */
223#ifndef CONFIG_M68KFPU_EMU_ONLY
224 /* clear the fpu if we have one */
225 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
226 volatile int zero = 0;
227 asm __volatile__ ("frestore %0" : : "m" (zero));
228 }
229#endif
230
231 if (CPU_IS_060) {
232 u32 pcr;
233
234 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
235 : "=d" (pcr));
236 if (((pcr >> 8) & 0xff) <= 5) {
237 printk("Enabling workaround for errata I14\n");
238 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
239 : : "d" (pcr | 0x20));
240 }
241 }
242
243 init_mm.start_code = PAGE_OFFSET;
244 init_mm.end_code = (unsigned long) &_etext;
245 init_mm.end_data = (unsigned long) &_edata;
246 init_mm.brk = (unsigned long) &_end;
247
248 *cmdline_p = m68k_command_line;
249 memcpy(saved_command_line, *cmdline_p, CL_SIZE);
250
251 /* Parse the command line for arch-specific options.
252 * For the m68k, this is currently only "debug=xxx" to enable printing
253 * certain kernel messages to some machine-specific device.
254 */
255 for( p = *cmdline_p; p && *p; ) {
256 i = 0;
257 if (!strncmp( p, "debug=", 6 )) {
258 strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) );
259 if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0;
260 i = 1;
261 }
262#ifdef CONFIG_ATARI
263 /* This option must be parsed very early */
264 if (!strncmp( p, "switches=", 9 )) {
265 extern void atari_switches_setup( const char *, int );
266 atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ?
267 (q - (p+9)) : strlen(p+9) );
268 i = 1;
269 }
270#endif
271
272 if (i) {
273 /* option processed, delete it */
274 if ((q = strchr( p, ' ' )))
275 strcpy( p, q+1 );
276 else
277 *p = 0;
278 } else {
279 if ((p = strchr( p, ' ' ))) ++p;
280 }
281 }
282
283 switch (m68k_machtype) {
284#ifdef CONFIG_AMIGA
285 case MACH_AMIGA:
286 config_amiga();
287 break;
288#endif
289#ifdef CONFIG_ATARI
290 case MACH_ATARI:
291 config_atari();
292 break;
293#endif
294#ifdef CONFIG_MAC
295 case MACH_MAC:
296 config_mac();
297 break;
298#endif
299#ifdef CONFIG_SUN3
300 case MACH_SUN3:
301 config_sun3();
302 break;
303#endif
304#ifdef CONFIG_APOLLO
305 case MACH_APOLLO:
306 config_apollo();
307 break;
308#endif
309#ifdef CONFIG_MVME147
310 case MACH_MVME147:
311 config_mvme147();
312 break;
313#endif
314#ifdef CONFIG_MVME16x
315 case MACH_MVME16x:
316 config_mvme16x();
317 break;
318#endif
319#ifdef CONFIG_BVME6000
320 case MACH_BVME6000:
321 config_bvme6000();
322 break;
323#endif
324#ifdef CONFIG_HP300
325 case MACH_HP300:
326 config_hp300();
327 break;
328#endif
329#ifdef CONFIG_Q40
330 case MACH_Q40:
331 config_q40();
332 break;
333#endif
334#ifdef CONFIG_SUN3X
335 case MACH_SUN3X:
336 config_sun3x();
337 break;
338#endif
339 default:
340 panic ("No configuration setup");
341 }
342
343#ifndef CONFIG_SUN3
344 startmem= m68k_memory[0].addr;
345 endmem = startmem + m68k_memory[0].size;
346 high_memory = (void *)PAGE_OFFSET;
347 for (i = 0; i < m68k_num_memory; i++) {
348 m68k_memory[i].size &= MASK_256K;
349 if (m68k_memory[i].addr < startmem)
350 startmem = m68k_memory[i].addr;
351 if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
352 endmem = m68k_memory[i].addr+m68k_memory[i].size;
353 high_memory += m68k_memory[i].size;
354 }
355
356 availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
357 startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
358
359 for (i = 0; i < m68k_num_memory; i++)
360 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
361
362 reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
363
364#ifdef CONFIG_BLK_DEV_INITRD
365 if (m68k_ramdisk.size) {
366 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
367 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
368 initrd_end = initrd_start + m68k_ramdisk.size;
369 printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
370 }
371#endif
372
373#ifdef CONFIG_ATARI
374 if (MACH_IS_ATARI)
375 atari_stram_reserve_pages((void *)availmem);
376#endif
377#ifdef CONFIG_SUN3X
378 if (MACH_IS_SUN3X) {
379 dvma_init();
380 }
381#endif
382
383#endif /* !CONFIG_SUN3 */
384
385 paging_init();
386
387/* set ISA defs early as possible */
388#if defined(CONFIG_ISA) && defined(MULTI_ISA)
389#if defined(CONFIG_Q40)
390 if (MACH_IS_Q40) {
391 isa_type = Q40_ISA;
392 isa_sex = 0;
393 }
394#elif defined(CONFIG_GG2)
395 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){
396 isa_type = GG2_ISA;
397 isa_sex = 0;
398 }
399#elif defined(CONFIG_AMIGA_PCMCIA)
400 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){
401 isa_type = AG_ISA;
402 isa_sex = 1;
403 }
404#endif
405#endif
406}
407
408static int show_cpuinfo(struct seq_file *m, void *v)
409{
410 const char *cpu, *mmu, *fpu;
411 unsigned long clockfreq, clockfactor;
412
413#define LOOP_CYCLES_68020 (8)
414#define LOOP_CYCLES_68030 (8)
415#define LOOP_CYCLES_68040 (3)
416#define LOOP_CYCLES_68060 (1)
417
418 if (CPU_IS_020) {
419 cpu = "68020";
420 clockfactor = LOOP_CYCLES_68020;
421 } else if (CPU_IS_030) {
422 cpu = "68030";
423 clockfactor = LOOP_CYCLES_68030;
424 } else if (CPU_IS_040) {
425 cpu = "68040";
426 clockfactor = LOOP_CYCLES_68040;
427 } else if (CPU_IS_060) {
428 cpu = "68060";
429 clockfactor = LOOP_CYCLES_68060;
430 } else {
431 cpu = "680x0";
432 clockfactor = 0;
433 }
434
435#ifdef CONFIG_M68KFPU_EMU_ONLY
436 fpu="none(soft float)";
437#else
438 if (m68k_fputype & FPU_68881)
439 fpu = "68881";
440 else if (m68k_fputype & FPU_68882)
441 fpu = "68882";
442 else if (m68k_fputype & FPU_68040)
443 fpu = "68040";
444 else if (m68k_fputype & FPU_68060)
445 fpu = "68060";
446 else if (m68k_fputype & FPU_SUNFPA)
447 fpu = "Sun FPA";
448 else
449 fpu = "none";
450#endif
451
452 if (m68k_mmutype & MMU_68851)
453 mmu = "68851";
454 else if (m68k_mmutype & MMU_68030)
455 mmu = "68030";
456 else if (m68k_mmutype & MMU_68040)
457 mmu = "68040";
458 else if (m68k_mmutype & MMU_68060)
459 mmu = "68060";
460 else if (m68k_mmutype & MMU_SUN3)
461 mmu = "Sun-3";
462 else if (m68k_mmutype & MMU_APOLLO)
463 mmu = "Apollo";
464 else
465 mmu = "unknown";
466
467 clockfreq = loops_per_jiffy*HZ*clockfactor;
468
469 seq_printf(m, "CPU:\t\t%s\n"
470 "MMU:\t\t%s\n"
471 "FPU:\t\t%s\n"
472 "Clocking:\t%lu.%1luMHz\n"
473 "BogoMips:\t%lu.%02lu\n"
474 "Calibration:\t%lu loops\n",
475 cpu, mmu, fpu,
476 clockfreq/1000000,(clockfreq/100000)%10,
477 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
478 loops_per_jiffy);
479 return 0;
480}
481
482static void *c_start(struct seq_file *m, loff_t *pos)
483{
484 return *pos < 1 ? (void *)1 : NULL;
485}
486static void *c_next(struct seq_file *m, void *v, loff_t *pos)
487{
488 ++*pos;
489 return NULL;
490}
491static void c_stop(struct seq_file *m, void *v)
492{
493}
494struct seq_operations cpuinfo_op = {
495 .start = c_start,
496 .next = c_next,
497 .stop = c_stop,
498 .show = show_cpuinfo,
499};
500
501int get_hardware_list(char *buffer)
502{
503 int len = 0;
504 char model[80];
505 unsigned long mem;
506 int i;
507
508 if (mach_get_model)
509 mach_get_model(model);
510 else
511 strcpy(model, "Unknown m68k");
512
513 len += sprintf(buffer+len, "Model:\t\t%s\n", model);
514 for (mem = 0, i = 0; i < m68k_num_memory; i++)
515 mem += m68k_memory[i].size;
516 len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10);
517
518 if (mach_get_hardware_list)
519 len += mach_get_hardware_list(buffer+len);
520
521 return(len);
522}
523
524
525#if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
526void __init floppy_setup(char *str, int *ints)
527{
528 if (mach_floppy_setup)
529 mach_floppy_setup (str, ints);
530}
531
532#endif
533
534void check_bugs(void)
535{
536#ifndef CONFIG_M68KFPU_EMU
537 if (m68k_fputype == 0) {
538 printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
539 "WHICH IS REQUIRED BY LINUX/M68K ***\n" );
540 printk( KERN_EMERG "Upgrade your hardware or join the FPU "
541 "emulation project\n" );
542 panic( "no FPU" );
543 }
544#endif /* !CONFIG_M68KFPU_EMU */
545}