[SPARC]: Hook up sys_tee() into syscall tables.
[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/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
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
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
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;
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
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
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
223 static void __init per_cpu_patch(void)
224 {
225         struct cpuid_patch_entry *p;
226         unsigned long ver;
227         int is_jbus;
228
229         if (tlb_type == spitfire && !this_is_starfire)
230                 return;
231
232         is_jbus = 0;
233         if (tlb_type != hypervisor) {
234                 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
235                 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
236                            (ver >> 32UL) == __SERRANO_ID);
237         }
238
239         p = &__cpuid_patch;
240         while (p < &__cpuid_patch_end) {
241                 unsigned long addr = p->addr;
242                 unsigned int *insns;
243
244                 switch (tlb_type) {
245                 case spitfire:
246                         insns = &p->starfire[0];
247                         break;
248                 case cheetah:
249                 case cheetah_plus:
250                         if (is_jbus)
251                                 insns = &p->cheetah_jbus[0];
252                         else
253                                 insns = &p->cheetah_safari[0];
254                         break;
255                 case hypervisor:
256                         insns = &p->sun4v[0];
257                         break;
258                 default:
259                         prom_printf("Unknown cpu type, halting.\n");
260                         prom_halt();
261                 };
262
263                 *(unsigned int *) (addr +  0) = insns[0];
264                 wmb();
265                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
266
267                 *(unsigned int *) (addr +  4) = insns[1];
268                 wmb();
269                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
270
271                 *(unsigned int *) (addr +  8) = insns[2];
272                 wmb();
273                 __asm__ __volatile__("flush     %0" : : "r" (addr +  8));
274
275                 *(unsigned int *) (addr + 12) = insns[3];
276                 wmb();
277                 __asm__ __volatile__("flush     %0" : : "r" (addr + 12));
278
279                 p++;
280         }
281 }
282
283 static void __init sun4v_patch(void)
284 {
285         struct sun4v_1insn_patch_entry *p1;
286         struct sun4v_2insn_patch_entry *p2;
287
288         if (tlb_type != hypervisor)
289                 return;
290
291         p1 = &__sun4v_1insn_patch;
292         while (p1 < &__sun4v_1insn_patch_end) {
293                 unsigned long addr = p1->addr;
294
295                 *(unsigned int *) (addr +  0) = p1->insn;
296                 wmb();
297                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
298
299                 p1++;
300         }
301
302         p2 = &__sun4v_2insn_patch;
303         while (p2 < &__sun4v_2insn_patch_end) {
304                 unsigned long addr = p2->addr;
305
306                 *(unsigned int *) (addr +  0) = p2->insns[0];
307                 wmb();
308                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
309
310                 *(unsigned int *) (addr +  4) = p2->insns[1];
311                 wmb();
312                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
313
314                 p2++;
315         }
316 }
317
318 void __init setup_arch(char **cmdline_p)
319 {
320         /* Initialize PROM console and command line. */
321         *cmdline_p = prom_getbootargs();
322         strcpy(saved_command_line, *cmdline_p);
323
324         if (tlb_type == hypervisor)
325                 printk("ARCH: SUN4V\n");
326         else
327                 printk("ARCH: SUN4U\n");
328
329 #ifdef CONFIG_DUMMY_CONSOLE
330         conswitchp = &dummy_con;
331 #elif defined(CONFIG_PROM_CONSOLE)
332         conswitchp = &prom_con;
333 #endif
334
335         /* Work out if we are starfire early on */
336         check_if_starfire();
337
338         /* Now we know enough to patch the get_cpuid sequences
339          * used by trap code.
340          */
341         per_cpu_patch();
342
343         sun4v_patch();
344
345         boot_flags_init(*cmdline_p);
346
347         idprom_init();
348
349         if (!root_flags)
350                 root_mountflags &= ~MS_RDONLY;
351         ROOT_DEV = old_decode_dev(root_dev);
352 #ifdef CONFIG_BLK_DEV_RAM
353         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
354         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
355         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);     
356 #endif
357
358         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
359
360 #ifdef CONFIG_IP_PNP
361         if (!ic_set_manually) {
362                 int chosen = prom_finddevice ("/chosen");
363                 u32 cl, sv, gw;
364                 
365                 cl = prom_getintdefault (chosen, "client-ip", 0);
366                 sv = prom_getintdefault (chosen, "server-ip", 0);
367                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
368                 if (cl && sv) {
369                         ic_myaddr = cl;
370                         ic_servaddr = sv;
371                         if (gw)
372                                 ic_gateway = gw;
373 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
374                         ic_proto_enabled = 0;
375 #endif
376                 }
377         }
378 #endif
379
380         smp_setup_cpu_possible_map();
381
382         /* Get boot processor trap_block[] setup.  */
383         init_cur_cpu_trap(current_thread_info());
384
385         paging_init();
386 }
387
388 static int __init set_preferred_console(void)
389 {
390         int idev, odev;
391
392         /* The user has requested a console so this is already set up. */
393         if (serial_console >= 0)
394                 return -EBUSY;
395
396         idev = prom_query_input_device();
397         odev = prom_query_output_device();
398         if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
399                 serial_console = 0;
400         } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
401                 serial_console = 1;
402         } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
403                 serial_console = 2;
404         } else if (idev == PROMDEV_IRSC && odev == PROMDEV_ORSC) {
405                 serial_console = 3;
406         } else if (idev == PROMDEV_IVCONS && odev == PROMDEV_OVCONS) {
407                 /* sunhv_console_init() doesn't check the serial_console
408                  * value anyways...
409                  */
410                 serial_console = 4;
411                 return add_preferred_console("ttyHV", 0, NULL);
412         } else {
413                 prom_printf("Inconsistent console: "
414                             "input %d, output %d\n",
415                             idev, odev);
416                 prom_halt();
417         }
418
419         if (serial_console)
420                 return add_preferred_console("ttyS", serial_console - 1, NULL);
421
422         return -ENODEV;
423 }
424 console_initcall(set_preferred_console);
425
426 /* BUFFER is PAGE_SIZE bytes long. */
427
428 extern char *sparc_cpu_type;
429 extern char *sparc_fpu_type;
430
431 extern void smp_info(struct seq_file *);
432 extern void smp_bogo(struct seq_file *);
433 extern void mmu_info(struct seq_file *);
434
435 unsigned int dcache_parity_tl1_occurred;
436 unsigned int icache_parity_tl1_occurred;
437
438 static int ncpus_probed;
439
440 static int show_cpuinfo(struct seq_file *m, void *__unused)
441 {
442         seq_printf(m, 
443                    "cpu\t\t: %s\n"
444                    "fpu\t\t: %s\n"
445                    "prom\t\t: %s\n"
446                    "type\t\t: %s\n"
447                    "ncpus probed\t: %d\n"
448                    "ncpus active\t: %d\n"
449                    "D$ parity tl1\t: %u\n"
450                    "I$ parity tl1\t: %u\n"
451 #ifndef CONFIG_SMP
452                    "Cpu0Bogo\t: %lu.%02lu\n"
453                    "Cpu0ClkTck\t: %016lx\n"
454 #endif
455                    ,
456                    sparc_cpu_type,
457                    sparc_fpu_type,
458                    prom_version,
459                    ((tlb_type == hypervisor) ?
460                     "sun4v" :
461                     "sun4u"),
462                    ncpus_probed,
463                    num_online_cpus(),
464                    dcache_parity_tl1_occurred,
465                    icache_parity_tl1_occurred
466 #ifndef CONFIG_SMP
467                    , cpu_data(0).udelay_val/(500000/HZ),
468                    (cpu_data(0).udelay_val/(5000/HZ)) % 100,
469                    cpu_data(0).clock_tick
470 #endif
471                 );
472 #ifdef CONFIG_SMP
473         smp_bogo(m);
474 #endif
475         mmu_info(m);
476 #ifdef CONFIG_SMP
477         smp_info(m);
478 #endif
479         return 0;
480 }
481
482 static void *c_start(struct seq_file *m, loff_t *pos)
483 {
484         /* The pointer we are returning is arbitrary,
485          * it just has to be non-NULL and not IS_ERR
486          * in the success case.
487          */
488         return *pos == 0 ? &c_start : NULL;
489 }
490
491 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
492 {
493         ++*pos;
494         return c_start(m, pos);
495 }
496
497 static void c_stop(struct seq_file *m, void *v)
498 {
499 }
500
501 struct seq_operations cpuinfo_op = {
502         .start =c_start,
503         .next = c_next,
504         .stop = c_stop,
505         .show = show_cpuinfo,
506 };
507
508 extern int stop_a_enabled;
509
510 void sun_do_break(void)
511 {
512         if (!stop_a_enabled)
513                 return;
514
515         prom_printf("\n");
516         flush_user_windows();
517
518         prom_cmdline();
519 }
520
521 int serial_console = -1;
522 int stop_a_enabled = 1;
523
524 static int __init topology_init(void)
525 {
526         int i, err;
527
528         err = -ENOMEM;
529
530         /* Count the number of physically present processors in
531          * the machine, even on uniprocessor, so that /proc/cpuinfo
532          * output is consistent with 2.4.x
533          */
534         ncpus_probed = 0;
535         while (!cpu_find_by_instance(ncpus_probed, NULL, NULL))
536                 ncpus_probed++;
537
538         for_each_possible_cpu(i) {
539                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
540                 if (p) {
541                         register_cpu(p, i, NULL);
542                         err = 0;
543                 }
544         }
545
546         return err;
547 }
548
549 subsys_initcall(topology_init);