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1da177e4 LT |
1 | /* $Id: setup.c,v 1.126 2001/11/13 00:49:27 davem Exp $ |
2 | * linux/arch/sparc/kernel/setup.c | |
3 | * | |
4 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
5 | * Copyright (C) 2000 Anton Blanchard (anton@samba.org) | |
6 | */ | |
7 | ||
8 | #include <linux/errno.h> | |
9 | #include <linux/sched.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/mm.h> | |
12 | #include <linux/stddef.h> | |
13 | #include <linux/unistd.h> | |
14 | #include <linux/ptrace.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/initrd.h> | |
17 | #include <asm/smp.h> | |
18 | #include <linux/user.h> | |
19 | #include <linux/a.out.h> | |
20 | #include <linux/tty.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/config.h> | |
23 | #include <linux/fs.h> | |
24 | #include <linux/seq_file.h> | |
25 | #include <linux/syscalls.h> | |
26 | #include <linux/kdev_t.h> | |
27 | #include <linux/major.h> | |
28 | #include <linux/string.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/console.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/root_dev.h> | |
a8cbdcea | 34 | #include <linux/cpu.h> |
1da177e4 | 35 | |
1da177e4 LT |
36 | #include <asm/system.h> |
37 | #include <asm/io.h> | |
38 | #include <asm/processor.h> | |
39 | #include <asm/oplib.h> | |
40 | #include <asm/page.h> | |
41 | #include <asm/pgtable.h> | |
42 | #include <asm/traps.h> | |
43 | #include <asm/vaddrs.h> | |
44 | #include <asm/kdebug.h> | |
45 | #include <asm/mbus.h> | |
46 | #include <asm/idprom.h> | |
47 | #include <asm/machines.h> | |
48 | #include <asm/cpudata.h> | |
49 | #include <asm/setup.h> | |
50 | ||
51 | struct screen_info screen_info = { | |
52 | 0, 0, /* orig-x, orig-y */ | |
53 | 0, /* unused */ | |
54 | 0, /* orig-video-page */ | |
55 | 0, /* orig-video-mode */ | |
56 | 128, /* orig-video-cols */ | |
57 | 0,0,0, /* ega_ax, ega_bx, ega_cx */ | |
58 | 54, /* orig-video-lines */ | |
59 | 0, /* orig-video-isVGA */ | |
60 | 16 /* orig-video-points */ | |
61 | }; | |
62 | ||
63 | /* Typing sync at the prom prompt calls the function pointed to by | |
64 | * romvec->pv_synchook which I set to the following function. | |
65 | * This should sync all filesystems and return, for now it just | |
66 | * prints out pretty messages and returns. | |
67 | */ | |
68 | ||
69 | extern unsigned long trapbase; | |
70 | void (*prom_palette)(int); | |
71 | ||
72 | /* Pretty sick eh? */ | |
73 | void prom_sync_me(void) | |
74 | { | |
75 | unsigned long prom_tbr, flags; | |
76 | ||
77 | /* XXX Badly broken. FIX! - Anton */ | |
78 | local_irq_save(flags); | |
79 | __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr)); | |
80 | __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" | |
81 | "nop\n\t" | |
82 | "nop\n\t" | |
83 | "nop\n\t" : : "r" (&trapbase)); | |
84 | ||
85 | if (prom_palette) | |
86 | prom_palette(1); | |
87 | prom_printf("PROM SYNC COMMAND...\n"); | |
88 | show_free_areas(); | |
89 | if(current->pid != 0) { | |
90 | local_irq_enable(); | |
91 | sys_sync(); | |
92 | local_irq_disable(); | |
93 | } | |
94 | prom_printf("Returning to prom\n"); | |
95 | ||
96 | __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" | |
97 | "nop\n\t" | |
98 | "nop\n\t" | |
99 | "nop\n\t" : : "r" (prom_tbr)); | |
100 | local_irq_restore(flags); | |
101 | ||
102 | return; | |
103 | } | |
104 | ||
105 | unsigned int boot_flags __initdata = 0; | |
106 | #define BOOTME_DEBUG 0x1 | |
107 | #define BOOTME_SINGLE 0x2 | |
108 | ||
109 | /* Exported for mm/init.c:paging_init. */ | |
110 | unsigned long cmdline_memory_size __initdata = 0; | |
111 | ||
112 | static void | |
113 | prom_console_write(struct console *con, const char *s, unsigned n) | |
114 | { | |
115 | prom_write(s, n); | |
116 | } | |
117 | ||
118 | static struct console prom_debug_console = { | |
119 | .name = "debug", | |
120 | .write = prom_console_write, | |
121 | .flags = CON_PRINTBUFFER, | |
122 | .index = -1, | |
123 | }; | |
124 | ||
125 | int obp_system_intr(void) | |
126 | { | |
127 | if (boot_flags & BOOTME_DEBUG) { | |
128 | printk("OBP: system interrupted\n"); | |
129 | prom_halt(); | |
130 | return 1; | |
131 | } | |
132 | return 0; | |
133 | } | |
134 | ||
135 | /* | |
136 | * Process kernel command line switches that are specific to the | |
137 | * SPARC or that require special low-level processing. | |
138 | */ | |
139 | static void __init process_switch(char c) | |
140 | { | |
141 | switch (c) { | |
142 | case 'd': | |
143 | boot_flags |= BOOTME_DEBUG; | |
144 | break; | |
145 | case 's': | |
146 | boot_flags |= BOOTME_SINGLE; | |
147 | break; | |
148 | case 'h': | |
149 | prom_printf("boot_flags_init: Halt!\n"); | |
150 | prom_halt(); | |
151 | break; | |
152 | case 'p': | |
153 | /* Use PROM debug console. */ | |
154 | register_console(&prom_debug_console); | |
155 | break; | |
156 | default: | |
157 | printk("Unknown boot switch (-%c)\n", c); | |
158 | break; | |
159 | } | |
160 | } | |
161 | ||
162 | static void __init process_console(char *commands) | |
163 | { | |
164 | serial_console = 0; | |
165 | commands += 8; | |
166 | /* Linux-style serial */ | |
167 | if (!strncmp(commands, "ttyS", 4)) | |
168 | serial_console = simple_strtoul(commands + 4, NULL, 10) + 1; | |
169 | else if (!strncmp(commands, "tty", 3)) { | |
170 | char c = *(commands + 3); | |
171 | /* Solaris-style serial */ | |
172 | if (c == 'a' || c == 'b') | |
173 | serial_console = c - 'a' + 1; | |
174 | /* else Linux-style fbcon, not serial */ | |
175 | } | |
176 | #if defined(CONFIG_PROM_CONSOLE) | |
177 | if (!strncmp(commands, "prom", 4)) { | |
178 | char *p; | |
179 | ||
180 | for (p = commands - 8; *p && *p != ' '; p++) | |
181 | *p = ' '; | |
182 | conswitchp = &prom_con; | |
183 | } | |
184 | #endif | |
185 | } | |
186 | ||
187 | static void __init boot_flags_init(char *commands) | |
188 | { | |
189 | while (*commands) { | |
190 | /* Move to the start of the next "argument". */ | |
191 | while (*commands && *commands == ' ') | |
192 | commands++; | |
193 | ||
194 | /* Process any command switches, otherwise skip it. */ | |
195 | if (*commands == '\0') | |
196 | break; | |
197 | if (*commands == '-') { | |
198 | commands++; | |
199 | while (*commands && *commands != ' ') | |
200 | process_switch(*commands++); | |
201 | continue; | |
202 | } | |
203 | if (!strncmp(commands, "console=", 8)) { | |
204 | process_console(commands); | |
205 | } else if (!strncmp(commands, "mem=", 4)) { | |
206 | /* | |
207 | * "mem=XXX[kKmM] overrides the PROM-reported | |
208 | * memory size. | |
209 | */ | |
210 | cmdline_memory_size = simple_strtoul(commands + 4, | |
211 | &commands, 0); | |
212 | if (*commands == 'K' || *commands == 'k') { | |
213 | cmdline_memory_size <<= 10; | |
214 | commands++; | |
215 | } else if (*commands=='M' || *commands=='m') { | |
216 | cmdline_memory_size <<= 20; | |
217 | commands++; | |
218 | } | |
219 | } | |
220 | while (*commands && *commands != ' ') | |
221 | commands++; | |
222 | } | |
223 | } | |
224 | ||
225 | /* This routine will in the future do all the nasty prom stuff | |
226 | * to probe for the mmu type and its parameters, etc. This will | |
227 | * also be where SMP things happen plus the Sparc specific memory | |
228 | * physical memory probe as on the alpha. | |
229 | */ | |
230 | ||
231 | extern int prom_probe_memory(void); | |
232 | extern void sun4c_probe_vac(void); | |
233 | extern char cputypval; | |
234 | extern unsigned long start, end; | |
235 | extern void panic_setup(char *, int *); | |
236 | ||
237 | extern unsigned short root_flags; | |
238 | extern unsigned short root_dev; | |
239 | extern unsigned short ram_flags; | |
240 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
241 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
242 | #define RAMDISK_LOAD_FLAG 0x4000 | |
243 | ||
244 | extern int root_mountflags; | |
245 | ||
246 | char reboot_command[COMMAND_LINE_SIZE]; | |
247 | enum sparc_cpu sparc_cpu_model; | |
248 | ||
249 | struct tt_entry *sparc_ttable; | |
250 | ||
251 | struct pt_regs fake_swapper_regs; | |
252 | ||
1da177e4 LT |
253 | void __init setup_arch(char **cmdline_p) |
254 | { | |
255 | int i; | |
256 | unsigned long highest_paddr; | |
257 | ||
258 | sparc_ttable = (struct tt_entry *) &start; | |
259 | ||
260 | /* Initialize PROM console and command line. */ | |
261 | *cmdline_p = prom_getbootargs(); | |
262 | strcpy(saved_command_line, *cmdline_p); | |
263 | ||
264 | /* Set sparc_cpu_model */ | |
265 | sparc_cpu_model = sun_unknown; | |
266 | if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; } | |
267 | if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; } | |
268 | if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; } | |
269 | if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; } /* CP-1200 with PROM 2.30 -E */ | |
270 | if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; } | |
271 | if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; } | |
272 | if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; } | |
273 | ||
274 | #ifdef CONFIG_SUN4 | |
275 | if (sparc_cpu_model != sun4) { | |
276 | prom_printf("This kernel is for Sun4 architecture only.\n"); | |
277 | prom_halt(); | |
278 | } | |
279 | #endif | |
280 | printk("ARCH: "); | |
281 | switch(sparc_cpu_model) { | |
282 | case sun4: | |
283 | printk("SUN4\n"); | |
284 | break; | |
285 | case sun4c: | |
286 | printk("SUN4C\n"); | |
287 | break; | |
288 | case sun4m: | |
289 | printk("SUN4M\n"); | |
290 | break; | |
291 | case sun4d: | |
292 | printk("SUN4D\n"); | |
293 | break; | |
294 | case sun4e: | |
295 | printk("SUN4E\n"); | |
296 | break; | |
297 | case sun4u: | |
298 | printk("SUN4U\n"); | |
299 | break; | |
300 | default: | |
301 | printk("UNKNOWN!\n"); | |
302 | break; | |
303 | }; | |
304 | ||
305 | #ifdef CONFIG_DUMMY_CONSOLE | |
306 | conswitchp = &dummy_con; | |
307 | #elif defined(CONFIG_PROM_CONSOLE) | |
308 | conswitchp = &prom_con; | |
309 | #endif | |
310 | boot_flags_init(*cmdline_p); | |
311 | ||
312 | idprom_init(); | |
313 | if (ARCH_SUN4C_SUN4) | |
314 | sun4c_probe_vac(); | |
315 | load_mmu(); | |
316 | (void) prom_probe_memory(); | |
317 | ||
318 | phys_base = 0xffffffffUL; | |
319 | highest_paddr = 0UL; | |
320 | for (i = 0; sp_banks[i].num_bytes != 0; i++) { | |
321 | unsigned long top; | |
322 | ||
323 | if (sp_banks[i].base_addr < phys_base) | |
324 | phys_base = sp_banks[i].base_addr; | |
325 | top = sp_banks[i].base_addr + | |
326 | sp_banks[i].num_bytes; | |
327 | if (highest_paddr < top) | |
328 | highest_paddr = top; | |
329 | } | |
330 | pfn_base = phys_base >> PAGE_SHIFT; | |
331 | ||
332 | if (!root_flags) | |
333 | root_mountflags &= ~MS_RDONLY; | |
334 | ROOT_DEV = old_decode_dev(root_dev); | |
5d2170ad | 335 | #ifdef CONFIG_BLK_DEV_RAM |
1da177e4 LT |
336 | rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; |
337 | rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0); | |
338 | rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0); | |
339 | #endif | |
340 | ||
341 | prom_setsync(prom_sync_me); | |
342 | ||
343 | if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && | |
344 | ((*(short *)linux_dbvec) != -1)) { | |
345 | printk("Booted under KADB. Syncing trap table.\n"); | |
346 | (*(linux_dbvec->teach_debugger))(); | |
347 | } | |
348 | ||
349 | init_mm.context = (unsigned long) NO_CONTEXT; | |
350 | init_task.thread.kregs = &fake_swapper_regs; | |
351 | ||
7202fb49 BB |
352 | smp_setup_cpu_possible_map(); |
353 | ||
1da177e4 LT |
354 | paging_init(); |
355 | } | |
356 | ||
357 | static int __init set_preferred_console(void) | |
358 | { | |
359 | int idev, odev; | |
360 | ||
361 | /* The user has requested a console so this is already set up. */ | |
362 | if (serial_console >= 0) | |
363 | return -EBUSY; | |
364 | ||
365 | idev = prom_query_input_device(); | |
366 | odev = prom_query_output_device(); | |
367 | if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) { | |
368 | serial_console = 0; | |
369 | } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) { | |
370 | serial_console = 1; | |
371 | } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) { | |
372 | serial_console = 2; | |
373 | } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) { | |
374 | prom_printf("MrCoffee ttya\n"); | |
375 | serial_console = 1; | |
376 | } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) { | |
377 | serial_console = 0; | |
378 | prom_printf("MrCoffee keyboard\n"); | |
379 | } else { | |
380 | prom_printf("Confusing console (idev %d, odev %d)\n", | |
381 | idev, odev); | |
382 | serial_console = 1; | |
383 | } | |
384 | ||
385 | if (serial_console) | |
386 | return add_preferred_console("ttyS", serial_console - 1, NULL); | |
387 | ||
388 | return -ENODEV; | |
389 | } | |
390 | console_initcall(set_preferred_console); | |
391 | ||
392 | extern char *sparc_cpu_type; | |
393 | extern char *sparc_fpu_type; | |
394 | ||
a8cbdcea BB |
395 | static int ncpus_probed; |
396 | ||
1da177e4 LT |
397 | static int show_cpuinfo(struct seq_file *m, void *__unused) |
398 | { | |
399 | seq_printf(m, | |
400 | "cpu\t\t: %s\n" | |
401 | "fpu\t\t: %s\n" | |
402 | "promlib\t\t: Version %d Revision %d\n" | |
403 | "prom\t\t: %d.%d\n" | |
404 | "type\t\t: %s\n" | |
405 | "ncpus probed\t: %d\n" | |
406 | "ncpus active\t: %d\n" | |
407 | #ifndef CONFIG_SMP | |
408 | "CPU0Bogo\t: %lu.%02lu\n" | |
409 | "CPU0ClkTck\t: %ld\n" | |
410 | #endif | |
411 | , | |
412 | sparc_cpu_type ? sparc_cpu_type : "undetermined", | |
413 | sparc_fpu_type ? sparc_fpu_type : "undetermined", | |
414 | romvec->pv_romvers, | |
415 | prom_rev, | |
416 | romvec->pv_printrev >> 16, | |
417 | romvec->pv_printrev & 0xffff, | |
418 | &cputypval, | |
a8cbdcea | 419 | ncpus_probed, |
1da177e4 LT |
420 | num_online_cpus() |
421 | #ifndef CONFIG_SMP | |
422 | , cpu_data(0).udelay_val/(500000/HZ), | |
423 | (cpu_data(0).udelay_val/(5000/HZ)) % 100, | |
424 | cpu_data(0).clock_tick | |
425 | #endif | |
426 | ); | |
427 | ||
428 | #ifdef CONFIG_SMP | |
429 | smp_bogo(m); | |
430 | #endif | |
431 | mmu_info(m); | |
432 | #ifdef CONFIG_SMP | |
433 | smp_info(m); | |
434 | #endif | |
435 | return 0; | |
436 | } | |
437 | ||
438 | static void *c_start(struct seq_file *m, loff_t *pos) | |
439 | { | |
440 | /* The pointer we are returning is arbitrary, | |
441 | * it just has to be non-NULL and not IS_ERR | |
442 | * in the success case. | |
443 | */ | |
444 | return *pos == 0 ? &c_start : NULL; | |
445 | } | |
446 | ||
447 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
448 | { | |
449 | ++*pos; | |
450 | return c_start(m, pos); | |
451 | } | |
452 | ||
453 | static void c_stop(struct seq_file *m, void *v) | |
454 | { | |
455 | } | |
456 | ||
457 | struct seq_operations cpuinfo_op = { | |
458 | .start =c_start, | |
459 | .next = c_next, | |
460 | .stop = c_stop, | |
461 | .show = show_cpuinfo, | |
462 | }; | |
463 | ||
464 | extern int stop_a_enabled; | |
465 | ||
466 | void sun_do_break(void) | |
467 | { | |
468 | if (!stop_a_enabled) | |
469 | return; | |
470 | ||
471 | printk("\n"); | |
472 | flush_user_windows(); | |
473 | ||
474 | prom_cmdline(); | |
475 | } | |
476 | ||
477 | int serial_console = -1; | |
478 | int stop_a_enabled = 1; | |
a8cbdcea BB |
479 | |
480 | static int __init topology_init(void) | |
481 | { | |
482 | int i, ncpus, err; | |
483 | ||
484 | /* Count the number of physically present processors in | |
485 | * the machine, even on uniprocessor, so that /proc/cpuinfo | |
486 | * output is consistent with 2.4.x | |
487 | */ | |
488 | ncpus = 0; | |
489 | while (!cpu_find_by_instance(ncpus, NULL, NULL)) | |
490 | ncpus++; | |
491 | ncpus_probed = ncpus; | |
492 | ||
493 | err = 0; | |
494 | for_each_online_cpu(i) { | |
495 | struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); | |
496 | if (!p) | |
497 | err = -ENOMEM; | |
498 | else | |
94583779 | 499 | register_cpu(p, i); |
a8cbdcea BB |
500 | } |
501 | ||
502 | return err; | |
503 | } | |
504 | ||
505 | subsys_initcall(topology_init); |