Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6] / arch / sparc64 / kernel / setup.c
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/screen_info.h>
20 #include <linux/delay.h>
21 #include <linux/fs.h>
22 #include <linux/seq_file.h>
23 #include <linux/syscalls.h>
24 #include <linux/kdev_t.h>
25 #include <linux/major.h>
26 #include <linux/string.h>
27 #include <linux/init.h>
28 #include <linux/inet.h>
29 #include <linux/console.h>
30 #include <linux/root_dev.h>
31 #include <linux/interrupt.h>
32 #include <linux/cpu.h>
33 #include <linux/initrd.h>
34
35 #include <asm/system.h>
36 #include <asm/io.h>
37 #include <asm/processor.h>
38 #include <asm/oplib.h>
39 #include <asm/page.h>
40 #include <asm/pgtable.h>
41 #include <asm/idprom.h>
42 #include <asm/head.h>
43 #include <asm/starfire.h>
44 #include <asm/mmu_context.h>
45 #include <asm/timer.h>
46 #include <asm/sections.h>
47 #include <asm/setup.h>
48 #include <asm/mmu.h>
49
50 #ifdef CONFIG_IP_PNP
51 #include <net/ipconfig.h>
52 #endif
53
54 struct screen_info screen_info = {
55         0, 0,                   /* orig-x, orig-y */
56         0,                      /* unused */
57         0,                      /* orig-video-page */
58         0,                      /* orig-video-mode */
59         128,                    /* orig-video-cols */
60         0, 0, 0,                /* unused, ega_bx, unused */
61         54,                     /* orig-video-lines */
62         0,                      /* orig-video-isVGA */
63         16                      /* orig-video-points */
64 };
65
66 void (*prom_palette)(int);
67 void (*prom_keyboard)(void);
68
69 static void
70 prom_console_write(struct console *con, const char *s, unsigned n)
71 {
72         prom_write(s, n);
73 }
74
75 unsigned int boot_flags = 0;
76 #define BOOTME_DEBUG  0x1
77 #define BOOTME_SINGLE 0x2
78
79 /* Exported for mm/init.c:paging_init. */
80 unsigned long cmdline_memory_size = 0;
81
82 static struct console prom_debug_console = {
83         .name =         "debug",
84         .write =        prom_console_write,
85         .flags =        CON_PRINTBUFFER,
86         .index =        -1,
87 };
88
89 /* XXX Implement this at some point... */
90 void kernel_enter_debugger(void)
91 {
92 }
93
94 int obp_system_intr(void)
95 {
96         if (boot_flags & BOOTME_DEBUG) {
97                 printk("OBP: system interrupted\n");
98                 prom_halt();
99                 return 1;
100         }
101         return 0;
102 }
103
104 /* 
105  * Process kernel command line switches that are specific to the
106  * SPARC or that require special low-level processing.
107  */
108 static void __init process_switch(char c)
109 {
110         switch (c) {
111         case 'd':
112                 boot_flags |= BOOTME_DEBUG;
113                 break;
114         case 's':
115                 boot_flags |= BOOTME_SINGLE;
116                 break;
117         case 'h':
118                 prom_printf("boot_flags_init: Halt!\n");
119                 prom_halt();
120                 break;
121         case 'p':
122                 /* Use PROM debug console. */
123                 register_console(&prom_debug_console);
124                 break;
125         case 'P':
126                 /* Force UltraSPARC-III P-Cache on. */
127                 if (tlb_type != cheetah) {
128                         printk("BOOT: Ignoring P-Cache force option.\n");
129                         break;
130                 }
131                 cheetah_pcache_forced_on = 1;
132                 add_taint(TAINT_MACHINE_CHECK);
133                 cheetah_enable_pcache();
134                 break;
135
136         default:
137                 printk("Unknown boot switch (-%c)\n", c);
138                 break;
139         }
140 }
141
142 static void __init process_console(char *commands)
143 {
144         serial_console = 0;
145         commands += 8;
146         /* Linux-style serial */
147         if (!strncmp(commands, "ttyS", 4))
148                 serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
149         else if (!strncmp(commands, "tty", 3)) {
150                 char c = *(commands + 3);
151                 /* Solaris-style serial */
152                 if (c == 'a' || c == 'b') {
153                         serial_console = c - 'a' + 1;
154                         prom_printf ("Using /dev/tty%c as console.\n", c);
155                 }
156                 /* else Linux-style fbcon, not serial */
157         }
158 #if defined(CONFIG_PROM_CONSOLE)
159         if (!strncmp(commands, "prom", 4)) {
160                 char *p;
161
162                 for (p = commands - 8; *p && *p != ' '; p++)
163                         *p = ' ';
164                 conswitchp = &prom_con;
165         }
166 #endif
167 }
168
169 static void __init boot_flags_init(char *commands)
170 {
171         while (*commands) {
172                 /* Move to the start of the next "argument". */
173                 while (*commands && *commands == ' ')
174                         commands++;
175
176                 /* Process any command switches, otherwise skip it. */
177                 if (*commands == '\0')
178                         break;
179                 if (*commands == '-') {
180                         commands++;
181                         while (*commands && *commands != ' ')
182                                 process_switch(*commands++);
183                         continue;
184                 }
185                 if (!strncmp(commands, "console=", 8)) {
186                         process_console(commands);
187                 } else if (!strncmp(commands, "mem=", 4)) {
188                         /*
189                          * "mem=XXX[kKmM]" overrides the PROM-reported
190                          * memory size.
191                          */
192                         cmdline_memory_size = simple_strtoul(commands + 4,
193                                                              &commands, 0);
194                         if (*commands == 'K' || *commands == 'k') {
195                                 cmdline_memory_size <<= 10;
196                                 commands++;
197                         } else if (*commands=='M' || *commands=='m') {
198                                 cmdline_memory_size <<= 20;
199                                 commands++;
200                         }
201                 }
202                 while (*commands && *commands != ' ')
203                         commands++;
204         }
205 }
206
207 extern void panic_setup(char *, int *);
208
209 extern unsigned short root_flags;
210 extern unsigned short root_dev;
211 extern unsigned short ram_flags;
212 #define RAMDISK_IMAGE_START_MASK        0x07FF
213 #define RAMDISK_PROMPT_FLAG             0x8000
214 #define RAMDISK_LOAD_FLAG               0x4000
215
216 extern int root_mountflags;
217
218 char reboot_command[COMMAND_LINE_SIZE];
219
220 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
221
222 void __init per_cpu_patch(void)
223 {
224         struct cpuid_patch_entry *p;
225         unsigned long ver;
226         int is_jbus;
227
228         if (tlb_type == spitfire && !this_is_starfire)
229                 return;
230
231         is_jbus = 0;
232         if (tlb_type != hypervisor) {
233                 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
234                 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
235                            (ver >> 32UL) == __SERRANO_ID);
236         }
237
238         p = &__cpuid_patch;
239         while (p < &__cpuid_patch_end) {
240                 unsigned long addr = p->addr;
241                 unsigned int *insns;
242
243                 switch (tlb_type) {
244                 case spitfire:
245                         insns = &p->starfire[0];
246                         break;
247                 case cheetah:
248                 case cheetah_plus:
249                         if (is_jbus)
250                                 insns = &p->cheetah_jbus[0];
251                         else
252                                 insns = &p->cheetah_safari[0];
253                         break;
254                 case hypervisor:
255                         insns = &p->sun4v[0];
256                         break;
257                 default:
258                         prom_printf("Unknown cpu type, halting.\n");
259                         prom_halt();
260                 };
261
262                 *(unsigned int *) (addr +  0) = insns[0];
263                 wmb();
264                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
265
266                 *(unsigned int *) (addr +  4) = insns[1];
267                 wmb();
268                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
269
270                 *(unsigned int *) (addr +  8) = insns[2];
271                 wmb();
272                 __asm__ __volatile__("flush     %0" : : "r" (addr +  8));
273
274                 *(unsigned int *) (addr + 12) = insns[3];
275                 wmb();
276                 __asm__ __volatile__("flush     %0" : : "r" (addr + 12));
277
278                 p++;
279         }
280 }
281
282 void __init sun4v_patch(void)
283 {
284         struct sun4v_1insn_patch_entry *p1;
285         struct sun4v_2insn_patch_entry *p2;
286
287         if (tlb_type != hypervisor)
288                 return;
289
290         p1 = &__sun4v_1insn_patch;
291         while (p1 < &__sun4v_1insn_patch_end) {
292                 unsigned long addr = p1->addr;
293
294                 *(unsigned int *) (addr +  0) = p1->insn;
295                 wmb();
296                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
297
298                 p1++;
299         }
300
301         p2 = &__sun4v_2insn_patch;
302         while (p2 < &__sun4v_2insn_patch_end) {
303                 unsigned long addr = p2->addr;
304
305                 *(unsigned int *) (addr +  0) = p2->insns[0];
306                 wmb();
307                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
308
309                 *(unsigned int *) (addr +  4) = p2->insns[1];
310                 wmb();
311                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
312
313                 p2++;
314         }
315 }
316
317 #ifdef CONFIG_SMP
318 void __init boot_cpu_id_too_large(int cpu)
319 {
320         prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
321                     cpu, NR_CPUS);
322         prom_halt();
323 }
324 #endif
325
326 void __init setup_arch(char **cmdline_p)
327 {
328         /* Initialize PROM console and command line. */
329         *cmdline_p = prom_getbootargs();
330         strcpy(saved_command_line, *cmdline_p);
331
332         if (tlb_type == hypervisor)
333                 printk("ARCH: SUN4V\n");
334         else
335                 printk("ARCH: SUN4U\n");
336
337 #ifdef CONFIG_DUMMY_CONSOLE
338         conswitchp = &dummy_con;
339 #elif defined(CONFIG_PROM_CONSOLE)
340         conswitchp = &prom_con;
341 #endif
342
343         boot_flags_init(*cmdline_p);
344
345         idprom_init();
346
347         if (!root_flags)
348                 root_mountflags &= ~MS_RDONLY;
349         ROOT_DEV = old_decode_dev(root_dev);
350 #ifdef CONFIG_BLK_DEV_RAM
351         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
352         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
353         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);     
354 #endif
355
356         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
357
358 #ifdef CONFIG_IP_PNP
359         if (!ic_set_manually) {
360                 int chosen = prom_finddevice ("/chosen");
361                 u32 cl, sv, gw;
362                 
363                 cl = prom_getintdefault (chosen, "client-ip", 0);
364                 sv = prom_getintdefault (chosen, "server-ip", 0);
365                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
366                 if (cl && sv) {
367                         ic_myaddr = cl;
368                         ic_servaddr = sv;
369                         if (gw)
370                                 ic_gateway = gw;
371 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
372                         ic_proto_enabled = 0;
373 #endif
374                 }
375         }
376 #endif
377
378         /* Get boot processor trap_block[] setup.  */
379         init_cur_cpu_trap(current_thread_info());
380
381         paging_init();
382
383         smp_setup_cpu_possible_map();
384 }
385
386 static int __init set_preferred_console(void)
387 {
388         int idev, odev;
389
390         /* The user has requested a console so this is already set up. */
391         if (serial_console >= 0)
392                 return -EBUSY;
393
394         idev = prom_query_input_device();
395         odev = prom_query_output_device();
396         if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
397                 serial_console = 0;
398         } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
399                 serial_console = 1;
400         } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
401                 serial_console = 2;
402         } else if (idev == PROMDEV_IRSC && odev == PROMDEV_ORSC) {
403                 serial_console = 3;
404         } else if (idev == PROMDEV_IVCONS && odev == PROMDEV_OVCONS) {
405                 /* sunhv_console_init() doesn't check the serial_console
406                  * value anyways...
407                  */
408                 serial_console = 4;
409                 return add_preferred_console("ttyHV", 0, NULL);
410         } else {
411                 prom_printf("Inconsistent console: "
412                             "input %d, output %d\n",
413                             idev, odev);
414                 prom_halt();
415         }
416
417         if (serial_console)
418                 return add_preferred_console("ttyS", serial_console - 1, NULL);
419
420         return -ENODEV;
421 }
422 console_initcall(set_preferred_console);
423
424 /* BUFFER is PAGE_SIZE bytes long. */
425
426 extern char *sparc_cpu_type;
427 extern char *sparc_fpu_type;
428
429 extern void smp_info(struct seq_file *);
430 extern void smp_bogo(struct seq_file *);
431 extern void mmu_info(struct seq_file *);
432
433 unsigned int dcache_parity_tl1_occurred;
434 unsigned int icache_parity_tl1_occurred;
435
436 static int ncpus_probed;
437
438 static int show_cpuinfo(struct seq_file *m, void *__unused)
439 {
440         seq_printf(m, 
441                    "cpu\t\t: %s\n"
442                    "fpu\t\t: %s\n"
443                    "prom\t\t: %s\n"
444                    "type\t\t: %s\n"
445                    "ncpus probed\t: %d\n"
446                    "ncpus active\t: %d\n"
447                    "D$ parity tl1\t: %u\n"
448                    "I$ parity tl1\t: %u\n"
449 #ifndef CONFIG_SMP
450                    "Cpu0Bogo\t: %lu.%02lu\n"
451                    "Cpu0ClkTck\t: %016lx\n"
452 #endif
453                    ,
454                    sparc_cpu_type,
455                    sparc_fpu_type,
456                    prom_version,
457                    ((tlb_type == hypervisor) ?
458                     "sun4v" :
459                     "sun4u"),
460                    ncpus_probed,
461                    num_online_cpus(),
462                    dcache_parity_tl1_occurred,
463                    icache_parity_tl1_occurred
464 #ifndef CONFIG_SMP
465                    , cpu_data(0).udelay_val/(500000/HZ),
466                    (cpu_data(0).udelay_val/(5000/HZ)) % 100,
467                    cpu_data(0).clock_tick
468 #endif
469                 );
470 #ifdef CONFIG_SMP
471         smp_bogo(m);
472 #endif
473         mmu_info(m);
474 #ifdef CONFIG_SMP
475         smp_info(m);
476 #endif
477         return 0;
478 }
479
480 static void *c_start(struct seq_file *m, loff_t *pos)
481 {
482         /* The pointer we are returning is arbitrary,
483          * it just has to be non-NULL and not IS_ERR
484          * in the success case.
485          */
486         return *pos == 0 ? &c_start : NULL;
487 }
488
489 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
490 {
491         ++*pos;
492         return c_start(m, pos);
493 }
494
495 static void c_stop(struct seq_file *m, void *v)
496 {
497 }
498
499 struct seq_operations cpuinfo_op = {
500         .start =c_start,
501         .next = c_next,
502         .stop = c_stop,
503         .show = show_cpuinfo,
504 };
505
506 extern int stop_a_enabled;
507
508 void sun_do_break(void)
509 {
510         if (!stop_a_enabled)
511                 return;
512
513         prom_printf("\n");
514         flush_user_windows();
515
516         prom_cmdline();
517 }
518
519 int serial_console = -1;
520 int stop_a_enabled = 1;
521
522 static int __init topology_init(void)
523 {
524         int i, err;
525
526         err = -ENOMEM;
527
528         /* Count the number of physically present processors in
529          * the machine, even on uniprocessor, so that /proc/cpuinfo
530          * output is consistent with 2.4.x
531          */
532         ncpus_probed = 0;
533         while (!cpu_find_by_instance(ncpus_probed, NULL, NULL))
534                 ncpus_probed++;
535
536         for_each_possible_cpu(i) {
537                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
538                 if (p) {
539                         register_cpu(p, i);
540                         err = 0;
541                 }
542         }
543
544         return err;
545 }
546
547 subsys_initcall(topology_init);