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1da177e4
LT
1/* $Id: setup.c,v 1.126 2001/11/13 00:49:27 davem Exp $
2 * linux/arch/sparc/kernel/setup.c
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
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 <linux/initrd.h>
17#include <asm/smp.h>
18#include <linux/user.h>
19#include <linux/a.out.h>
894673ee 20#include <linux/screen_info.h>
1da177e4 21#include <linux/delay.h>
1da177e4
LT
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/interrupt.h>
30#include <linux/console.h>
31#include <linux/spinlock.h>
32#include <linux/root_dev.h>
a8cbdcea 33#include <linux/cpu.h>
1da177e4 34
1da177e4
LT
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/traps.h>
42#include <asm/vaddrs.h>
43#include <asm/kdebug.h>
44#include <asm/mbus.h>
45#include <asm/idprom.h>
46#include <asm/machines.h>
47#include <asm/cpudata.h>
48#include <asm/setup.h>
49
50struct screen_info screen_info = {
51 0, 0, /* orig-x, orig-y */
52 0, /* unused */
53 0, /* orig-video-page */
54 0, /* orig-video-mode */
55 128, /* orig-video-cols */
56 0,0,0, /* ega_ax, ega_bx, ega_cx */
57 54, /* orig-video-lines */
58 0, /* orig-video-isVGA */
59 16 /* orig-video-points */
60};
61
62/* Typing sync at the prom prompt calls the function pointed to by
63 * romvec->pv_synchook which I set to the following function.
64 * This should sync all filesystems and return, for now it just
65 * prints out pretty messages and returns.
66 */
67
68extern unsigned long trapbase;
69void (*prom_palette)(int);
70
71/* Pretty sick eh? */
72void prom_sync_me(void)
73{
74 unsigned long prom_tbr, flags;
75
76 /* XXX Badly broken. FIX! - Anton */
77 local_irq_save(flags);
78 __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
79 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
80 "nop\n\t"
81 "nop\n\t"
82 "nop\n\t" : : "r" (&trapbase));
83
84 if (prom_palette)
85 prom_palette(1);
86 prom_printf("PROM SYNC COMMAND...\n");
87 show_free_areas();
88 if(current->pid != 0) {
89 local_irq_enable();
90 sys_sync();
91 local_irq_disable();
92 }
93 prom_printf("Returning to prom\n");
94
95 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
96 "nop\n\t"
97 "nop\n\t"
98 "nop\n\t" : : "r" (prom_tbr));
99 local_irq_restore(flags);
100
101 return;
102}
103
104unsigned int boot_flags __initdata = 0;
105#define BOOTME_DEBUG 0x1
1da177e4
LT
106
107/* Exported for mm/init.c:paging_init. */
108unsigned long cmdline_memory_size __initdata = 0;
109
110static void
111prom_console_write(struct console *con, const char *s, unsigned n)
112{
113 prom_write(s, n);
114}
115
116static struct console prom_debug_console = {
117 .name = "debug",
118 .write = prom_console_write,
119 .flags = CON_PRINTBUFFER,
120 .index = -1,
121};
122
1da177e4
LT
123/*
124 * Process kernel command line switches that are specific to the
125 * SPARC or that require special low-level processing.
126 */
127static void __init process_switch(char c)
128{
129 switch (c) {
130 case 'd':
131 boot_flags |= BOOTME_DEBUG;
132 break;
133 case 's':
1da177e4
LT
134 break;
135 case 'h':
136 prom_printf("boot_flags_init: Halt!\n");
137 prom_halt();
138 break;
139 case 'p':
140 /* Use PROM debug console. */
141 register_console(&prom_debug_console);
142 break;
143 default:
144 printk("Unknown boot switch (-%c)\n", c);
145 break;
146 }
147}
148
149static void __init process_console(char *commands)
150{
151 serial_console = 0;
152 commands += 8;
153 /* Linux-style serial */
154 if (!strncmp(commands, "ttyS", 4))
155 serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
156 else if (!strncmp(commands, "tty", 3)) {
157 char c = *(commands + 3);
158 /* Solaris-style serial */
159 if (c == 'a' || c == 'b')
160 serial_console = c - 'a' + 1;
161 /* else Linux-style fbcon, not serial */
162 }
163#if defined(CONFIG_PROM_CONSOLE)
164 if (!strncmp(commands, "prom", 4)) {
165 char *p;
166
167 for (p = commands - 8; *p && *p != ' '; p++)
168 *p = ' ';
169 conswitchp = &prom_con;
170 }
171#endif
172}
173
174static void __init boot_flags_init(char *commands)
175{
176 while (*commands) {
177 /* Move to the start of the next "argument". */
178 while (*commands && *commands == ' ')
179 commands++;
180
181 /* Process any command switches, otherwise skip it. */
182 if (*commands == '\0')
183 break;
184 if (*commands == '-') {
185 commands++;
186 while (*commands && *commands != ' ')
187 process_switch(*commands++);
188 continue;
189 }
190 if (!strncmp(commands, "console=", 8)) {
191 process_console(commands);
192 } else if (!strncmp(commands, "mem=", 4)) {
193 /*
194 * "mem=XXX[kKmM] overrides the PROM-reported
195 * memory size.
196 */
197 cmdline_memory_size = simple_strtoul(commands + 4,
198 &commands, 0);
199 if (*commands == 'K' || *commands == 'k') {
200 cmdline_memory_size <<= 10;
201 commands++;
202 } else if (*commands=='M' || *commands=='m') {
203 cmdline_memory_size <<= 20;
204 commands++;
205 }
206 }
207 while (*commands && *commands != ' ')
208 commands++;
209 }
210}
211
212/* This routine will in the future do all the nasty prom stuff
213 * to probe for the mmu type and its parameters, etc. This will
214 * also be where SMP things happen plus the Sparc specific memory
215 * physical memory probe as on the alpha.
216 */
217
218extern int prom_probe_memory(void);
219extern void sun4c_probe_vac(void);
220extern char cputypval;
221extern unsigned long start, end;
222extern void panic_setup(char *, int *);
223
224extern unsigned short root_flags;
225extern unsigned short root_dev;
226extern unsigned short ram_flags;
227#define RAMDISK_IMAGE_START_MASK 0x07FF
228#define RAMDISK_PROMPT_FLAG 0x8000
229#define RAMDISK_LOAD_FLAG 0x4000
230
231extern int root_mountflags;
232
233char reboot_command[COMMAND_LINE_SIZE];
234enum sparc_cpu sparc_cpu_model;
235
236struct tt_entry *sparc_ttable;
237
238struct pt_regs fake_swapper_regs;
239
1da177e4
LT
240void __init setup_arch(char **cmdline_p)
241{
242 int i;
243 unsigned long highest_paddr;
244
245 sparc_ttable = (struct tt_entry *) &start;
246
247 /* Initialize PROM console and command line. */
248 *cmdline_p = prom_getbootargs();
249 strcpy(saved_command_line, *cmdline_p);
250
251 /* Set sparc_cpu_model */
252 sparc_cpu_model = sun_unknown;
253 if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; }
254 if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; }
255 if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; }
256 if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; } /* CP-1200 with PROM 2.30 -E */
257 if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; }
258 if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; }
259 if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; }
260
261#ifdef CONFIG_SUN4
262 if (sparc_cpu_model != sun4) {
263 prom_printf("This kernel is for Sun4 architecture only.\n");
264 prom_halt();
265 }
266#endif
267 printk("ARCH: ");
268 switch(sparc_cpu_model) {
269 case sun4:
270 printk("SUN4\n");
271 break;
272 case sun4c:
273 printk("SUN4C\n");
274 break;
275 case sun4m:
276 printk("SUN4M\n");
277 break;
278 case sun4d:
279 printk("SUN4D\n");
280 break;
281 case sun4e:
282 printk("SUN4E\n");
283 break;
284 case sun4u:
285 printk("SUN4U\n");
286 break;
287 default:
288 printk("UNKNOWN!\n");
289 break;
290 };
291
292#ifdef CONFIG_DUMMY_CONSOLE
293 conswitchp = &dummy_con;
294#elif defined(CONFIG_PROM_CONSOLE)
295 conswitchp = &prom_con;
296#endif
297 boot_flags_init(*cmdline_p);
298
299 idprom_init();
300 if (ARCH_SUN4C_SUN4)
301 sun4c_probe_vac();
302 load_mmu();
303 (void) prom_probe_memory();
304
305 phys_base = 0xffffffffUL;
306 highest_paddr = 0UL;
307 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
308 unsigned long top;
309
310 if (sp_banks[i].base_addr < phys_base)
311 phys_base = sp_banks[i].base_addr;
312 top = sp_banks[i].base_addr +
313 sp_banks[i].num_bytes;
314 if (highest_paddr < top)
315 highest_paddr = top;
316 }
317 pfn_base = phys_base >> PAGE_SHIFT;
318
319 if (!root_flags)
320 root_mountflags &= ~MS_RDONLY;
321 ROOT_DEV = old_decode_dev(root_dev);
5d2170ad 322#ifdef CONFIG_BLK_DEV_RAM
1da177e4
LT
323 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
324 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
325 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
326#endif
327
328 prom_setsync(prom_sync_me);
329
330 if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
331 ((*(short *)linux_dbvec) != -1)) {
332 printk("Booted under KADB. Syncing trap table.\n");
333 (*(linux_dbvec->teach_debugger))();
334 }
335
336 init_mm.context = (unsigned long) NO_CONTEXT;
337 init_task.thread.kregs = &fake_swapper_regs;
338
339 paging_init();
a23b423e
KH
340
341 smp_setup_cpu_possible_map();
1da177e4
LT
342}
343
344static int __init set_preferred_console(void)
345{
346 int idev, odev;
347
348 /* The user has requested a console so this is already set up. */
349 if (serial_console >= 0)
350 return -EBUSY;
351
352 idev = prom_query_input_device();
353 odev = prom_query_output_device();
354 if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
355 serial_console = 0;
356 } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
357 serial_console = 1;
358 } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
359 serial_console = 2;
360 } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) {
361 prom_printf("MrCoffee ttya\n");
362 serial_console = 1;
363 } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) {
364 serial_console = 0;
365 prom_printf("MrCoffee keyboard\n");
366 } else {
367 prom_printf("Confusing console (idev %d, odev %d)\n",
368 idev, odev);
369 serial_console = 1;
370 }
371
372 if (serial_console)
373 return add_preferred_console("ttyS", serial_console - 1, NULL);
374
375 return -ENODEV;
376}
377console_initcall(set_preferred_console);
378
379extern char *sparc_cpu_type;
380extern char *sparc_fpu_type;
381
a8cbdcea
BB
382static int ncpus_probed;
383
1da177e4
LT
384static int show_cpuinfo(struct seq_file *m, void *__unused)
385{
386 seq_printf(m,
387 "cpu\t\t: %s\n"
388 "fpu\t\t: %s\n"
389 "promlib\t\t: Version %d Revision %d\n"
390 "prom\t\t: %d.%d\n"
391 "type\t\t: %s\n"
392 "ncpus probed\t: %d\n"
393 "ncpus active\t: %d\n"
394#ifndef CONFIG_SMP
395 "CPU0Bogo\t: %lu.%02lu\n"
396 "CPU0ClkTck\t: %ld\n"
397#endif
398 ,
399 sparc_cpu_type ? sparc_cpu_type : "undetermined",
400 sparc_fpu_type ? sparc_fpu_type : "undetermined",
401 romvec->pv_romvers,
402 prom_rev,
403 romvec->pv_printrev >> 16,
404 romvec->pv_printrev & 0xffff,
405 &cputypval,
a8cbdcea 406 ncpus_probed,
1da177e4
LT
407 num_online_cpus()
408#ifndef CONFIG_SMP
409 , cpu_data(0).udelay_val/(500000/HZ),
410 (cpu_data(0).udelay_val/(5000/HZ)) % 100,
411 cpu_data(0).clock_tick
412#endif
413 );
414
415#ifdef CONFIG_SMP
416 smp_bogo(m);
417#endif
418 mmu_info(m);
419#ifdef CONFIG_SMP
420 smp_info(m);
421#endif
422 return 0;
423}
424
425static void *c_start(struct seq_file *m, loff_t *pos)
426{
427 /* The pointer we are returning is arbitrary,
428 * it just has to be non-NULL and not IS_ERR
429 * in the success case.
430 */
431 return *pos == 0 ? &c_start : NULL;
432}
433
434static void *c_next(struct seq_file *m, void *v, loff_t *pos)
435{
436 ++*pos;
437 return c_start(m, pos);
438}
439
440static void c_stop(struct seq_file *m, void *v)
441{
442}
443
444struct seq_operations cpuinfo_op = {
445 .start =c_start,
446 .next = c_next,
447 .stop = c_stop,
448 .show = show_cpuinfo,
449};
450
451extern int stop_a_enabled;
452
453void sun_do_break(void)
454{
455 if (!stop_a_enabled)
456 return;
457
458 printk("\n");
459 flush_user_windows();
460
461 prom_cmdline();
462}
463
464int serial_console = -1;
465int stop_a_enabled = 1;
a8cbdcea
BB
466
467static int __init topology_init(void)
468{
469 int i, ncpus, err;
470
471 /* Count the number of physically present processors in
472 * the machine, even on uniprocessor, so that /proc/cpuinfo
473 * output is consistent with 2.4.x
474 */
475 ncpus = 0;
476 while (!cpu_find_by_instance(ncpus, NULL, NULL))
477 ncpus++;
478 ncpus_probed = ncpus;
479
480 err = 0;
481 for_each_online_cpu(i) {
482 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
483 if (!p)
484 err = -ENOMEM;
485 else
94583779 486 register_cpu(p, i);
a8cbdcea
BB
487 }
488
489 return err;
490}
491
492subsys_initcall(topology_init);