aafde3dd9fd4996af17f88f4d486aec214cdfe63
[linux-2.6.git] / 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 #include <asm/ns87303.h>
50
51 #ifdef CONFIG_IP_PNP
52 #include <net/ipconfig.h>
53 #endif
54
55 /* Used to synchronize accesses to NatSemi SUPER I/O chip configure
56  * operations in asm/ns87303.h
57  */
58 DEFINE_SPINLOCK(ns87303_lock);
59
60 struct screen_info screen_info = {
61         0, 0,                   /* orig-x, orig-y */
62         0,                      /* unused */
63         0,                      /* orig-video-page */
64         0,                      /* orig-video-mode */
65         128,                    /* orig-video-cols */
66         0, 0, 0,                /* unused, ega_bx, unused */
67         54,                     /* orig-video-lines */
68         0,                      /* orig-video-isVGA */
69         16                      /* orig-video-points */
70 };
71
72 void (*prom_palette)(int);
73 void (*prom_keyboard)(void);
74
75 static void
76 prom_console_write(struct console *con, const char *s, unsigned n)
77 {
78         prom_write(s, n);
79 }
80
81 unsigned int boot_flags = 0;
82 #define BOOTME_DEBUG  0x1
83
84 /* Exported for mm/init.c:paging_init. */
85 unsigned long cmdline_memory_size = 0;
86
87 static struct console prom_debug_console = {
88         .name =         "debug",
89         .write =        prom_console_write,
90         .flags =        CON_PRINTBUFFER,
91         .index =        -1,
92 };
93
94 /* XXX Implement this at some point... */
95 void kernel_enter_debugger(void)
96 {
97 }
98
99 /* 
100  * Process kernel command line switches that are specific to the
101  * SPARC or that require special low-level processing.
102  */
103 static void __init process_switch(char c)
104 {
105         switch (c) {
106         case 'd':
107                 boot_flags |= BOOTME_DEBUG;
108                 break;
109         case 's':
110                 break;
111         case 'h':
112                 prom_printf("boot_flags_init: Halt!\n");
113                 prom_halt();
114                 break;
115         case 'p':
116                 /* Use PROM debug console. */
117                 register_console(&prom_debug_console);
118                 break;
119         case 'P':
120                 /* Force UltraSPARC-III P-Cache on. */
121                 if (tlb_type != cheetah) {
122                         printk("BOOT: Ignoring P-Cache force option.\n");
123                         break;
124                 }
125                 cheetah_pcache_forced_on = 1;
126                 add_taint(TAINT_MACHINE_CHECK);
127                 cheetah_enable_pcache();
128                 break;
129
130         default:
131                 printk("Unknown boot switch (-%c)\n", c);
132                 break;
133         }
134 }
135
136 static void __init process_console(char *commands)
137 {
138         serial_console = 0;
139         commands += 8;
140         /* Linux-style serial */
141         if (!strncmp(commands, "ttyS", 4))
142                 serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
143         else if (!strncmp(commands, "tty", 3)) {
144                 char c = *(commands + 3);
145                 /* Solaris-style serial */
146                 if (c == 'a' || c == 'b') {
147                         serial_console = c - 'a' + 1;
148                         prom_printf ("Using /dev/tty%c as console.\n", c);
149                 }
150                 /* else Linux-style fbcon, not serial */
151         }
152 #if defined(CONFIG_PROM_CONSOLE)
153         if (!strncmp(commands, "prom", 4)) {
154                 char *p;
155
156                 for (p = commands - 8; *p && *p != ' '; p++)
157                         *p = ' ';
158                 conswitchp = &prom_con;
159         }
160 #endif
161 }
162
163 static void __init boot_flags_init(char *commands)
164 {
165         while (*commands) {
166                 /* Move to the start of the next "argument". */
167                 while (*commands && *commands == ' ')
168                         commands++;
169
170                 /* Process any command switches, otherwise skip it. */
171                 if (*commands == '\0')
172                         break;
173                 if (*commands == '-') {
174                         commands++;
175                         while (*commands && *commands != ' ')
176                                 process_switch(*commands++);
177                         continue;
178                 }
179                 if (!strncmp(commands, "console=", 8)) {
180                         process_console(commands);
181                 } else if (!strncmp(commands, "mem=", 4)) {
182                         /*
183                          * "mem=XXX[kKmM]" overrides the PROM-reported
184                          * memory size.
185                          */
186                         cmdline_memory_size = simple_strtoul(commands + 4,
187                                                              &commands, 0);
188                         if (*commands == 'K' || *commands == 'k') {
189                                 cmdline_memory_size <<= 10;
190                                 commands++;
191                         } else if (*commands=='M' || *commands=='m') {
192                                 cmdline_memory_size <<= 20;
193                                 commands++;
194                         }
195                 }
196                 while (*commands && *commands != ' ')
197                         commands++;
198         }
199 }
200
201 extern void panic_setup(char *, int *);
202
203 extern unsigned short root_flags;
204 extern unsigned short root_dev;
205 extern unsigned short ram_flags;
206 #define RAMDISK_IMAGE_START_MASK        0x07FF
207 #define RAMDISK_PROMPT_FLAG             0x8000
208 #define RAMDISK_LOAD_FLAG               0x4000
209
210 extern int root_mountflags;
211
212 char reboot_command[COMMAND_LINE_SIZE];
213
214 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
215
216 void __init per_cpu_patch(void)
217 {
218         struct cpuid_patch_entry *p;
219         unsigned long ver;
220         int is_jbus;
221
222         if (tlb_type == spitfire && !this_is_starfire)
223                 return;
224
225         is_jbus = 0;
226         if (tlb_type != hypervisor) {
227                 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
228                 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
229                            (ver >> 32UL) == __SERRANO_ID);
230         }
231
232         p = &__cpuid_patch;
233         while (p < &__cpuid_patch_end) {
234                 unsigned long addr = p->addr;
235                 unsigned int *insns;
236
237                 switch (tlb_type) {
238                 case spitfire:
239                         insns = &p->starfire[0];
240                         break;
241                 case cheetah:
242                 case cheetah_plus:
243                         if (is_jbus)
244                                 insns = &p->cheetah_jbus[0];
245                         else
246                                 insns = &p->cheetah_safari[0];
247                         break;
248                 case hypervisor:
249                         insns = &p->sun4v[0];
250                         break;
251                 default:
252                         prom_printf("Unknown cpu type, halting.\n");
253                         prom_halt();
254                 };
255
256                 *(unsigned int *) (addr +  0) = insns[0];
257                 wmb();
258                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
259
260                 *(unsigned int *) (addr +  4) = insns[1];
261                 wmb();
262                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
263
264                 *(unsigned int *) (addr +  8) = insns[2];
265                 wmb();
266                 __asm__ __volatile__("flush     %0" : : "r" (addr +  8));
267
268                 *(unsigned int *) (addr + 12) = insns[3];
269                 wmb();
270                 __asm__ __volatile__("flush     %0" : : "r" (addr + 12));
271
272                 p++;
273         }
274 }
275
276 void __init sun4v_patch(void)
277 {
278         extern void sun4v_hvapi_init(void);
279         struct sun4v_1insn_patch_entry *p1;
280         struct sun4v_2insn_patch_entry *p2;
281
282         if (tlb_type != hypervisor)
283                 return;
284
285         p1 = &__sun4v_1insn_patch;
286         while (p1 < &__sun4v_1insn_patch_end) {
287                 unsigned long addr = p1->addr;
288
289                 *(unsigned int *) (addr +  0) = p1->insn;
290                 wmb();
291                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
292
293                 p1++;
294         }
295
296         p2 = &__sun4v_2insn_patch;
297         while (p2 < &__sun4v_2insn_patch_end) {
298                 unsigned long addr = p2->addr;
299
300                 *(unsigned int *) (addr +  0) = p2->insns[0];
301                 wmb();
302                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
303
304                 *(unsigned int *) (addr +  4) = p2->insns[1];
305                 wmb();
306                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
307
308                 p2++;
309         }
310
311         sun4v_hvapi_init();
312 }
313
314 #ifdef CONFIG_SMP
315 void __init boot_cpu_id_too_large(int cpu)
316 {
317         prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
318                     cpu, NR_CPUS);
319         prom_halt();
320 }
321 #endif
322
323 void __init setup_arch(char **cmdline_p)
324 {
325         /* Initialize PROM console and command line. */
326         *cmdline_p = prom_getbootargs();
327         strcpy(boot_command_line, *cmdline_p);
328
329         if (tlb_type == hypervisor)
330                 printk("ARCH: SUN4V\n");
331         else
332                 printk("ARCH: SUN4U\n");
333
334 #ifdef CONFIG_DUMMY_CONSOLE
335         conswitchp = &dummy_con;
336 #elif defined(CONFIG_PROM_CONSOLE)
337         conswitchp = &prom_con;
338 #endif
339
340         boot_flags_init(*cmdline_p);
341
342         idprom_init();
343
344         if (!root_flags)
345                 root_mountflags &= ~MS_RDONLY;
346         ROOT_DEV = old_decode_dev(root_dev);
347 #ifdef CONFIG_BLK_DEV_RAM
348         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
349         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
350         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);     
351 #endif
352
353         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
354
355 #ifdef CONFIG_IP_PNP
356         if (!ic_set_manually) {
357                 int chosen = prom_finddevice ("/chosen");
358                 u32 cl, sv, gw;
359                 
360                 cl = prom_getintdefault (chosen, "client-ip", 0);
361                 sv = prom_getintdefault (chosen, "server-ip", 0);
362                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
363                 if (cl && sv) {
364                         ic_myaddr = cl;
365                         ic_servaddr = sv;
366                         if (gw)
367                                 ic_gateway = gw;
368 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
369                         ic_proto_enabled = 0;
370 #endif
371                 }
372         }
373 #endif
374
375         /* Get boot processor trap_block[] setup.  */
376         init_cur_cpu_trap(current_thread_info());
377
378         paging_init();
379 }
380
381 static int __init set_preferred_console(void)
382 {
383         int idev, odev;
384
385         /* The user has requested a console so this is already set up. */
386         if (serial_console >= 0)
387                 return -EBUSY;
388
389         idev = prom_query_input_device();
390         odev = prom_query_output_device();
391         if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
392                 serial_console = 0;
393         } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
394                 serial_console = 1;
395         } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
396                 serial_console = 2;
397         } else if (idev == PROMDEV_IRSC && odev == PROMDEV_ORSC) {
398                 serial_console = 3;
399         } else if (idev == PROMDEV_IVCONS && odev == PROMDEV_OVCONS) {
400                 /* sunhv_console_init() doesn't check the serial_console
401                  * value anyways...
402                  */
403                 serial_console = 4;
404                 return add_preferred_console("ttyHV", 0, NULL);
405         } else {
406                 prom_printf("Inconsistent console: "
407                             "input %d, output %d\n",
408                             idev, odev);
409                 prom_halt();
410         }
411
412         if (serial_console)
413                 return add_preferred_console("ttyS", serial_console - 1, NULL);
414
415         return -ENODEV;
416 }
417 console_initcall(set_preferred_console);
418
419 /* BUFFER is PAGE_SIZE bytes long. */
420
421 extern char *sparc_cpu_type;
422 extern char *sparc_fpu_type;
423
424 extern void smp_info(struct seq_file *);
425 extern void smp_bogo(struct seq_file *);
426 extern void mmu_info(struct seq_file *);
427
428 unsigned int dcache_parity_tl1_occurred;
429 unsigned int icache_parity_tl1_occurred;
430
431 int ncpus_probed;
432
433 static int show_cpuinfo(struct seq_file *m, void *__unused)
434 {
435         seq_printf(m, 
436                    "cpu\t\t: %s\n"
437                    "fpu\t\t: %s\n"
438                    "prom\t\t: %s\n"
439                    "type\t\t: %s\n"
440                    "ncpus probed\t: %d\n"
441                    "ncpus active\t: %d\n"
442                    "D$ parity tl1\t: %u\n"
443                    "I$ parity tl1\t: %u\n"
444 #ifndef CONFIG_SMP
445                    "Cpu0ClkTck\t: %016lx\n"
446 #endif
447                    ,
448                    sparc_cpu_type,
449                    sparc_fpu_type,
450                    prom_version,
451                    ((tlb_type == hypervisor) ?
452                     "sun4v" :
453                     "sun4u"),
454                    ncpus_probed,
455                    num_online_cpus(),
456                    dcache_parity_tl1_occurred,
457                    icache_parity_tl1_occurred
458 #ifndef CONFIG_SMP
459                    , cpu_data(0).clock_tick
460 #endif
461                 );
462 #ifdef CONFIG_SMP
463         smp_bogo(m);
464 #endif
465         mmu_info(m);
466 #ifdef CONFIG_SMP
467         smp_info(m);
468 #endif
469         return 0;
470 }
471
472 static void *c_start(struct seq_file *m, loff_t *pos)
473 {
474         /* The pointer we are returning is arbitrary,
475          * it just has to be non-NULL and not IS_ERR
476          * in the success case.
477          */
478         return *pos == 0 ? &c_start : NULL;
479 }
480
481 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
482 {
483         ++*pos;
484         return c_start(m, pos);
485 }
486
487 static void c_stop(struct seq_file *m, void *v)
488 {
489 }
490
491 struct seq_operations cpuinfo_op = {
492         .start =c_start,
493         .next = c_next,
494         .stop = c_stop,
495         .show = show_cpuinfo,
496 };
497
498 extern int stop_a_enabled;
499
500 void sun_do_break(void)
501 {
502         if (!stop_a_enabled)
503                 return;
504
505         prom_printf("\n");
506         flush_user_windows();
507
508         prom_cmdline();
509 }
510
511 int serial_console = -1;
512 int stop_a_enabled = 1;