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