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1da177e4 LT |
1 | /* $Id: setup.c,v 1.72 2002/02/09 19:49:30 davem Exp $ |
2 | * linux/arch/sparc64/kernel/setup.c | |
3 | * | |
4 | * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu) | |
5 | * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
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 <asm/smp.h> | |
17 | #include <linux/user.h> | |
18 | #include <linux/a.out.h> | |
19 | #include <linux/tty.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/config.h> | |
22 | #include <linux/fs.h> | |
23 | #include <linux/seq_file.h> | |
24 | #include <linux/syscalls.h> | |
25 | #include <linux/kdev_t.h> | |
26 | #include <linux/major.h> | |
27 | #include <linux/string.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/inet.h> | |
30 | #include <linux/console.h> | |
31 | #include <linux/root_dev.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/cpu.h> | |
34 | #include <linux/initrd.h> | |
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/idprom.h> | |
43 | #include <asm/head.h> | |
44 | #include <asm/starfire.h> | |
45 | #include <asm/mmu_context.h> | |
46 | #include <asm/timer.h> | |
47 | #include <asm/sections.h> | |
48 | #include <asm/setup.h> | |
49 | #include <asm/mmu.h> | |
50 | ||
51 | #ifdef CONFIG_IP_PNP | |
52 | #include <net/ipconfig.h> | |
53 | #endif | |
54 | ||
55 | struct screen_info screen_info = { | |
56 | 0, 0, /* orig-x, orig-y */ | |
57 | 0, /* unused */ | |
58 | 0, /* orig-video-page */ | |
59 | 0, /* orig-video-mode */ | |
60 | 128, /* orig-video-cols */ | |
61 | 0, 0, 0, /* unused, ega_bx, unused */ | |
62 | 54, /* orig-video-lines */ | |
63 | 0, /* orig-video-isVGA */ | |
64 | 16 /* orig-video-points */ | |
65 | }; | |
66 | ||
1da177e4 LT |
67 | void (*prom_palette)(int); |
68 | void (*prom_keyboard)(void); | |
69 | ||
70 | static void | |
71 | prom_console_write(struct console *con, const char *s, unsigned n) | |
72 | { | |
73 | prom_write(s, n); | |
74 | } | |
75 | ||
1da177e4 LT |
76 | unsigned int boot_flags = 0; |
77 | #define BOOTME_DEBUG 0x1 | |
78 | #define BOOTME_SINGLE 0x2 | |
79 | ||
80 | /* Exported for mm/init.c:paging_init. */ | |
81 | unsigned long cmdline_memory_size = 0; | |
82 | ||
83 | static struct console prom_debug_console = { | |
84 | .name = "debug", | |
85 | .write = prom_console_write, | |
86 | .flags = CON_PRINTBUFFER, | |
87 | .index = -1, | |
88 | }; | |
89 | ||
90 | /* XXX Implement this at some point... */ | |
91 | void kernel_enter_debugger(void) | |
92 | { | |
93 | } | |
94 | ||
95 | int obp_system_intr(void) | |
96 | { | |
97 | if (boot_flags & BOOTME_DEBUG) { | |
98 | printk("OBP: system interrupted\n"); | |
99 | prom_halt(); | |
100 | return 1; | |
101 | } | |
102 | return 0; | |
103 | } | |
104 | ||
105 | /* | |
106 | * Process kernel command line switches that are specific to the | |
107 | * SPARC or that require special low-level processing. | |
108 | */ | |
109 | static void __init process_switch(char c) | |
110 | { | |
111 | switch (c) { | |
112 | case 'd': | |
113 | boot_flags |= BOOTME_DEBUG; | |
114 | break; | |
115 | case 's': | |
116 | boot_flags |= BOOTME_SINGLE; | |
117 | break; | |
118 | case 'h': | |
119 | prom_printf("boot_flags_init: Halt!\n"); | |
120 | prom_halt(); | |
121 | break; | |
122 | case 'p': | |
123 | /* Use PROM debug console. */ | |
124 | register_console(&prom_debug_console); | |
125 | break; | |
816242da DM |
126 | case 'P': |
127 | /* Force UltraSPARC-III P-Cache on. */ | |
128 | if (tlb_type != cheetah) { | |
129 | printk("BOOT: Ignoring P-Cache force option.\n"); | |
130 | break; | |
131 | } | |
132 | cheetah_pcache_forced_on = 1; | |
133 | add_taint(TAINT_MACHINE_CHECK); | |
134 | cheetah_enable_pcache(); | |
135 | break; | |
136 | ||
1da177e4 LT |
137 | default: |
138 | printk("Unknown boot switch (-%c)\n", c); | |
139 | break; | |
140 | } | |
141 | } | |
142 | ||
143 | static void __init process_console(char *commands) | |
144 | { | |
145 | serial_console = 0; | |
146 | commands += 8; | |
147 | /* Linux-style serial */ | |
148 | if (!strncmp(commands, "ttyS", 4)) | |
149 | serial_console = simple_strtoul(commands + 4, NULL, 10) + 1; | |
150 | else if (!strncmp(commands, "tty", 3)) { | |
151 | char c = *(commands + 3); | |
152 | /* Solaris-style serial */ | |
153 | if (c == 'a' || c == 'b') { | |
154 | serial_console = c - 'a' + 1; | |
155 | prom_printf ("Using /dev/tty%c as console.\n", c); | |
156 | } | |
157 | /* else Linux-style fbcon, not serial */ | |
158 | } | |
159 | #if defined(CONFIG_PROM_CONSOLE) | |
160 | if (!strncmp(commands, "prom", 4)) { | |
161 | char *p; | |
162 | ||
163 | for (p = commands - 8; *p && *p != ' '; p++) | |
164 | *p = ' '; | |
165 | conswitchp = &prom_con; | |
166 | } | |
167 | #endif | |
168 | } | |
169 | ||
170 | static void __init boot_flags_init(char *commands) | |
171 | { | |
172 | while (*commands) { | |
173 | /* Move to the start of the next "argument". */ | |
174 | while (*commands && *commands == ' ') | |
175 | commands++; | |
176 | ||
177 | /* Process any command switches, otherwise skip it. */ | |
178 | if (*commands == '\0') | |
179 | break; | |
180 | if (*commands == '-') { | |
181 | commands++; | |
182 | while (*commands && *commands != ' ') | |
183 | process_switch(*commands++); | |
184 | continue; | |
185 | } | |
186 | if (!strncmp(commands, "console=", 8)) { | |
187 | process_console(commands); | |
188 | } else if (!strncmp(commands, "mem=", 4)) { | |
189 | /* | |
190 | * "mem=XXX[kKmM]" overrides the PROM-reported | |
191 | * memory size. | |
192 | */ | |
193 | cmdline_memory_size = simple_strtoul(commands + 4, | |
194 | &commands, 0); | |
195 | if (*commands == 'K' || *commands == 'k') { | |
196 | cmdline_memory_size <<= 10; | |
197 | commands++; | |
198 | } else if (*commands=='M' || *commands=='m') { | |
199 | cmdline_memory_size <<= 20; | |
200 | commands++; | |
201 | } | |
202 | } | |
203 | while (*commands && *commands != ' ') | |
204 | commands++; | |
205 | } | |
206 | } | |
207 | ||
1da177e4 LT |
208 | extern void panic_setup(char *, int *); |
209 | ||
210 | extern unsigned short root_flags; | |
211 | extern unsigned short root_dev; | |
212 | extern unsigned short ram_flags; | |
213 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
214 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
215 | #define RAMDISK_LOAD_FLAG 0x4000 | |
216 | ||
217 | extern int root_mountflags; | |
218 | ||
219 | char reboot_command[COMMAND_LINE_SIZE]; | |
220 | ||
221 | static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 }; | |
222 | ||
92704a1c DM |
223 | static void __init per_cpu_patch(void) |
224 | { | |
225 | #ifdef CONFIG_SMP | |
226 | struct cpuid_patch_entry *p; | |
227 | unsigned long ver; | |
228 | int is_jbus; | |
229 | ||
230 | if (tlb_type == spitfire && !this_is_starfire) | |
231 | return; | |
232 | ||
d82ace7d DM |
233 | is_jbus = 0; |
234 | if (tlb_type != hypervisor) { | |
235 | __asm__ ("rdpr %%ver, %0" : "=r" (ver)); | |
236 | is_jbus = ((ver >> 32) == __JALAPENO_ID || | |
237 | (ver >> 32) == __SERRANO_ID); | |
238 | } | |
92704a1c DM |
239 | |
240 | p = &__cpuid_patch; | |
241 | while (p < &__cpuid_patch_end) { | |
242 | unsigned long addr = p->addr; | |
243 | unsigned int *insns; | |
244 | ||
245 | switch (tlb_type) { | |
246 | case spitfire: | |
247 | insns = &p->starfire[0]; | |
248 | break; | |
249 | case cheetah: | |
250 | case cheetah_plus: | |
251 | if (is_jbus) | |
252 | insns = &p->cheetah_jbus[0]; | |
253 | else | |
254 | insns = &p->cheetah_safari[0]; | |
255 | break; | |
d96b8153 DM |
256 | case hypervisor: |
257 | insns = &p->sun4v[0]; | |
258 | break; | |
92704a1c DM |
259 | default: |
260 | prom_printf("Unknown cpu type, halting.\n"); | |
261 | prom_halt(); | |
262 | }; | |
263 | ||
264 | *(unsigned int *) (addr + 0) = insns[0]; | |
840aaef8 | 265 | wmb(); |
92704a1c DM |
266 | __asm__ __volatile__("flush %0" : : "r" (addr + 0)); |
267 | ||
268 | *(unsigned int *) (addr + 4) = insns[1]; | |
840aaef8 | 269 | wmb(); |
92704a1c DM |
270 | __asm__ __volatile__("flush %0" : : "r" (addr + 4)); |
271 | ||
272 | *(unsigned int *) (addr + 8) = insns[2]; | |
840aaef8 | 273 | wmb(); |
92704a1c DM |
274 | __asm__ __volatile__("flush %0" : : "r" (addr + 8)); |
275 | ||
276 | *(unsigned int *) (addr + 12) = insns[3]; | |
840aaef8 | 277 | wmb(); |
92704a1c DM |
278 | __asm__ __volatile__("flush %0" : : "r" (addr + 12)); |
279 | ||
280 | p++; | |
281 | } | |
282 | #endif | |
283 | } | |
284 | ||
df7d6aec | 285 | static void __init sun4v_patch(void) |
936f482a | 286 | { |
df7d6aec DM |
287 | struct sun4v_1insn_patch_entry *p1; |
288 | struct sun4v_2insn_patch_entry *p2; | |
936f482a DM |
289 | |
290 | if (tlb_type != hypervisor) | |
291 | return; | |
292 | ||
df7d6aec DM |
293 | p1 = &__sun4v_1insn_patch; |
294 | while (p1 < &__sun4v_1insn_patch_end) { | |
45fec05f | 295 | unsigned long addr = p1->addr; |
936f482a | 296 | |
45fec05f | 297 | *(unsigned int *) (addr + 0) = p1->insn; |
840aaef8 | 298 | wmb(); |
936f482a DM |
299 | __asm__ __volatile__("flush %0" : : "r" (addr + 0)); |
300 | ||
45fec05f DM |
301 | p1++; |
302 | } | |
303 | ||
df7d6aec DM |
304 | p2 = &__sun4v_2insn_patch; |
305 | while (p2 < &__sun4v_2insn_patch_end) { | |
45fec05f DM |
306 | unsigned long addr = p2->addr; |
307 | ||
308 | *(unsigned int *) (addr + 0) = p2->insns[0]; | |
840aaef8 | 309 | wmb(); |
45fec05f DM |
310 | __asm__ __volatile__("flush %0" : : "r" (addr + 0)); |
311 | ||
fd05068d | 312 | *(unsigned int *) (addr + 4) = p2->insns[1]; |
840aaef8 | 313 | wmb(); |
45fec05f DM |
314 | __asm__ __volatile__("flush %0" : : "r" (addr + 4)); |
315 | ||
316 | p2++; | |
936f482a DM |
317 | } |
318 | } | |
319 | ||
1da177e4 LT |
320 | void __init setup_arch(char **cmdline_p) |
321 | { | |
1da177e4 LT |
322 | /* Initialize PROM console and command line. */ |
323 | *cmdline_p = prom_getbootargs(); | |
324 | strcpy(saved_command_line, *cmdline_p); | |
325 | ||
3a8c069d DM |
326 | if (tlb_type == hypervisor) |
327 | printk("ARCH: SUN4V\n"); | |
328 | else | |
329 | printk("ARCH: SUN4U\n"); | |
1da177e4 LT |
330 | |
331 | #ifdef CONFIG_DUMMY_CONSOLE | |
332 | conswitchp = &dummy_con; | |
333 | #elif defined(CONFIG_PROM_CONSOLE) | |
334 | conswitchp = &prom_con; | |
335 | #endif | |
336 | ||
1da177e4 LT |
337 | /* Work out if we are starfire early on */ |
338 | check_if_starfire(); | |
339 | ||
92704a1c DM |
340 | /* Now we know enough to patch the get_cpuid sequences |
341 | * used by trap code. | |
56fb4df6 DM |
342 | */ |
343 | per_cpu_patch(); | |
344 | ||
df7d6aec | 345 | sun4v_patch(); |
936f482a | 346 | |
1da177e4 LT |
347 | boot_flags_init(*cmdline_p); |
348 | ||
349 | idprom_init(); | |
1da177e4 LT |
350 | |
351 | if (!root_flags) | |
352 | root_mountflags &= ~MS_RDONLY; | |
353 | ROOT_DEV = old_decode_dev(root_dev); | |
354 | #ifdef CONFIG_BLK_DEV_INITRD | |
355 | rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; | |
356 | rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0); | |
357 | rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0); | |
358 | #endif | |
359 | ||
f3169641 | 360 | task_thread_info(&init_task)->kregs = &fake_swapper_regs; |
1da177e4 LT |
361 | |
362 | #ifdef CONFIG_IP_PNP | |
363 | if (!ic_set_manually) { | |
364 | int chosen = prom_finddevice ("/chosen"); | |
365 | u32 cl, sv, gw; | |
366 | ||
367 | cl = prom_getintdefault (chosen, "client-ip", 0); | |
368 | sv = prom_getintdefault (chosen, "server-ip", 0); | |
369 | gw = prom_getintdefault (chosen, "gateway-ip", 0); | |
370 | if (cl && sv) { | |
371 | ic_myaddr = cl; | |
372 | ic_servaddr = sv; | |
373 | if (gw) | |
374 | ic_gateway = gw; | |
375 | #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP) | |
376 | ic_proto_enabled = 0; | |
377 | #endif | |
378 | } | |
379 | } | |
380 | #endif | |
381 | ||
7abea921 DM |
382 | smp_setup_cpu_possible_map(); |
383 | ||
1da177e4 | 384 | paging_init(); |
56fb4df6 DM |
385 | |
386 | /* Get boot processor trap_block[] setup. */ | |
387 | init_cur_cpu_trap(); | |
1da177e4 LT |
388 | } |
389 | ||
390 | static int __init set_preferred_console(void) | |
391 | { | |
392 | int idev, odev; | |
393 | ||
394 | /* The user has requested a console so this is already set up. */ | |
395 | if (serial_console >= 0) | |
396 | return -EBUSY; | |
397 | ||
398 | idev = prom_query_input_device(); | |
399 | odev = prom_query_output_device(); | |
400 | if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) { | |
401 | serial_console = 0; | |
402 | } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) { | |
403 | serial_console = 1; | |
404 | } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) { | |
405 | serial_console = 2; | |
c126cf80 ED |
406 | } else if (idev == PROMDEV_IRSC && odev == PROMDEV_ORSC) { |
407 | serial_console = 3; | |
1a7a242c DM |
408 | } else if (idev == PROMDEV_IVCONS && odev == PROMDEV_OVCONS) { |
409 | /* sunhv_console_init() doesn't check the serial_console | |
410 | * value anyways... | |
411 | */ | |
412 | serial_console = 4; | |
d5a2aa24 | 413 | return add_preferred_console("ttyHV", 0, NULL); |
1da177e4 LT |
414 | } else { |
415 | prom_printf("Inconsistent console: " | |
416 | "input %d, output %d\n", | |
417 | idev, odev); | |
418 | prom_halt(); | |
419 | } | |
420 | ||
421 | if (serial_console) | |
422 | return add_preferred_console("ttyS", serial_console - 1, NULL); | |
423 | ||
424 | return -ENODEV; | |
425 | } | |
426 | console_initcall(set_preferred_console); | |
427 | ||
428 | /* BUFFER is PAGE_SIZE bytes long. */ | |
429 | ||
430 | extern char *sparc_cpu_type; | |
431 | extern char *sparc_fpu_type; | |
432 | ||
433 | extern void smp_info(struct seq_file *); | |
434 | extern void smp_bogo(struct seq_file *); | |
435 | extern void mmu_info(struct seq_file *); | |
436 | ||
80dc0d6b DM |
437 | unsigned int dcache_parity_tl1_occurred; |
438 | unsigned int icache_parity_tl1_occurred; | |
439 | ||
4d45cbac DM |
440 | static int ncpus_probed; |
441 | ||
1da177e4 LT |
442 | static int show_cpuinfo(struct seq_file *m, void *__unused) |
443 | { | |
444 | seq_printf(m, | |
445 | "cpu\t\t: %s\n" | |
446 | "fpu\t\t: %s\n" | |
447 | "promlib\t\t: Version 3 Revision %d\n" | |
448 | "prom\t\t: %d.%d.%d\n" | |
449 | "type\t\t: sun4u\n" | |
4d45cbac DM |
450 | "ncpus probed\t: %d\n" |
451 | "ncpus active\t: %d\n" | |
80dc0d6b DM |
452 | "D$ parity tl1\t: %u\n" |
453 | "I$ parity tl1\t: %u\n" | |
1da177e4 LT |
454 | #ifndef CONFIG_SMP |
455 | "Cpu0Bogo\t: %lu.%02lu\n" | |
456 | "Cpu0ClkTck\t: %016lx\n" | |
457 | #endif | |
458 | , | |
459 | sparc_cpu_type, | |
460 | sparc_fpu_type, | |
461 | prom_rev, | |
462 | prom_prev >> 16, | |
463 | (prom_prev >> 8) & 0xff, | |
464 | prom_prev & 0xff, | |
4d45cbac DM |
465 | ncpus_probed, |
466 | num_online_cpus(), | |
80dc0d6b DM |
467 | dcache_parity_tl1_occurred, |
468 | icache_parity_tl1_occurred | |
1da177e4 LT |
469 | #ifndef CONFIG_SMP |
470 | , cpu_data(0).udelay_val/(500000/HZ), | |
471 | (cpu_data(0).udelay_val/(5000/HZ)) % 100, | |
472 | cpu_data(0).clock_tick | |
473 | #endif | |
474 | ); | |
475 | #ifdef CONFIG_SMP | |
476 | smp_bogo(m); | |
477 | #endif | |
478 | mmu_info(m); | |
479 | #ifdef CONFIG_SMP | |
480 | smp_info(m); | |
481 | #endif | |
482 | return 0; | |
483 | } | |
484 | ||
485 | static void *c_start(struct seq_file *m, loff_t *pos) | |
486 | { | |
487 | /* The pointer we are returning is arbitrary, | |
488 | * it just has to be non-NULL and not IS_ERR | |
489 | * in the success case. | |
490 | */ | |
491 | return *pos == 0 ? &c_start : NULL; | |
492 | } | |
493 | ||
494 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
495 | { | |
496 | ++*pos; | |
497 | return c_start(m, pos); | |
498 | } | |
499 | ||
500 | static void c_stop(struct seq_file *m, void *v) | |
501 | { | |
502 | } | |
503 | ||
504 | struct seq_operations cpuinfo_op = { | |
505 | .start =c_start, | |
506 | .next = c_next, | |
507 | .stop = c_stop, | |
508 | .show = show_cpuinfo, | |
509 | }; | |
510 | ||
511 | extern int stop_a_enabled; | |
512 | ||
513 | void sun_do_break(void) | |
514 | { | |
515 | if (!stop_a_enabled) | |
516 | return; | |
517 | ||
518 | prom_printf("\n"); | |
519 | flush_user_windows(); | |
520 | ||
521 | prom_cmdline(); | |
522 | } | |
523 | ||
524 | int serial_console = -1; | |
525 | int stop_a_enabled = 1; | |
526 | ||
527 | static int __init topology_init(void) | |
528 | { | |
529 | int i, err; | |
530 | ||
531 | err = -ENOMEM; | |
4d45cbac DM |
532 | |
533 | /* Count the number of physically present processors in | |
534 | * the machine, even on uniprocessor, so that /proc/cpuinfo | |
535 | * output is consistent with 2.4.x | |
536 | */ | |
537 | ncpus_probed = 0; | |
538 | while (!cpu_find_by_instance(ncpus_probed, NULL, NULL)) | |
539 | ncpus_probed++; | |
540 | ||
1da177e4 LT |
541 | for (i = 0; i < NR_CPUS; i++) { |
542 | if (cpu_possible(i)) { | |
543 | struct cpu *p = kmalloc(sizeof(*p), GFP_KERNEL); | |
544 | ||
545 | if (p) { | |
546 | memset(p, 0, sizeof(*p)); | |
547 | register_cpu(p, i, NULL); | |
548 | err = 0; | |
549 | } | |
550 | } | |
551 | } | |
552 | ||
553 | return err; | |
554 | } | |
555 | ||
556 | subsys_initcall(topology_init); |