blob: b22ce610040362e18f9e5b8f3f565056973e86ba [file] [log] [blame]
Adrian Bunk88278ca2008-05-19 16:53:02 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * 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>
Jon Smirl894673e2006-07-10 04:44:13 -070019#include <linux/screen_info.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#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/interrupt.h>
29#include <linux/console.h>
30#include <linux/spinlock.h>
31#include <linux/root_dev.h>
Bob Breuera8cbdce2006-06-20 00:28:33 -070032#include <linux/cpu.h>
Christoph Hellwig1eeb66a2007-05-08 00:27:03 -070033#include <linux/kdebug.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <asm/mbus.h>
44#include <asm/idprom.h>
45#include <asm/machines.h>
46#include <asm/cpudata.h>
47#include <asm/setup.h>
48
Sam Ravnborg53ae3412008-12-07 00:02:08 -080049#include "kernel.h"
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051struct screen_info screen_info = {
52 0, 0, /* orig-x, orig-y */
53 0, /* unused */
54 0, /* orig-video-page */
55 0, /* orig-video-mode */
56 128, /* orig-video-cols */
57 0,0,0, /* ega_ax, ega_bx, ega_cx */
58 54, /* orig-video-lines */
59 0, /* orig-video-isVGA */
60 16 /* orig-video-points */
61};
62
63/* Typing sync at the prom prompt calls the function pointed to by
64 * romvec->pv_synchook which I set to the following function.
65 * This should sync all filesystems and return, for now it just
66 * prints out pretty messages and returns.
67 */
68
69extern unsigned long trapbase;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
71/* Pretty sick eh? */
Adrian Bunkc61c65c2008-06-05 11:40:58 -070072static void prom_sync_me(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073{
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 prom_printf("PROM SYNC COMMAND...\n");
85 show_free_areas();
86 if(current->pid != 0) {
87 local_irq_enable();
88 sys_sync();
89 local_irq_disable();
90 }
91 prom_printf("Returning to prom\n");
92
93 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
94 "nop\n\t"
95 "nop\n\t"
96 "nop\n\t" : : "r" (prom_tbr));
97 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098}
99
Adrian Bunkc61c65c2008-06-05 11:40:58 -0700100static unsigned int boot_flags __initdata = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101#define BOOTME_DEBUG 0x1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103/* Exported for mm/init.c:paging_init. */
104unsigned long cmdline_memory_size __initdata = 0;
105
106static void
107prom_console_write(struct console *con, const char *s, unsigned n)
108{
109 prom_write(s, n);
110}
111
112static struct console prom_debug_console = {
113 .name = "debug",
114 .write = prom_console_write,
115 .flags = CON_PRINTBUFFER,
116 .index = -1,
117};
118
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119/*
120 * Process kernel command line switches that are specific to the
121 * SPARC or that require special low-level processing.
122 */
123static void __init process_switch(char c)
124{
125 switch (c) {
126 case 'd':
127 boot_flags |= BOOTME_DEBUG;
128 break;
129 case 's':
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 break;
131 case 'h':
132 prom_printf("boot_flags_init: Halt!\n");
133 prom_halt();
134 break;
135 case 'p':
136 /* Use PROM debug console. */
137 register_console(&prom_debug_console);
138 break;
139 default:
140 printk("Unknown boot switch (-%c)\n", c);
141 break;
142 }
143}
144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145static void __init boot_flags_init(char *commands)
146{
147 while (*commands) {
148 /* Move to the start of the next "argument". */
149 while (*commands && *commands == ' ')
150 commands++;
151
152 /* Process any command switches, otherwise skip it. */
153 if (*commands == '\0')
154 break;
155 if (*commands == '-') {
156 commands++;
157 while (*commands && *commands != ' ')
158 process_switch(*commands++);
159 continue;
160 }
David S. Millerc73fcc82007-07-20 16:59:26 -0700161 if (!strncmp(commands, "mem=", 4)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 /*
163 * "mem=XXX[kKmM] overrides the PROM-reported
164 * memory size.
165 */
166 cmdline_memory_size = simple_strtoul(commands + 4,
167 &commands, 0);
168 if (*commands == 'K' || *commands == 'k') {
169 cmdline_memory_size <<= 10;
170 commands++;
171 } else if (*commands=='M' || *commands=='m') {
172 cmdline_memory_size <<= 20;
173 commands++;
174 }
175 }
176 while (*commands && *commands != ' ')
177 commands++;
178 }
179}
180
181/* This routine will in the future do all the nasty prom stuff
182 * to probe for the mmu type and its parameters, etc. This will
David S. Miller9f2b2a52008-05-01 22:28:17 -0700183 * also be where SMP things happen.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 */
185
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186extern void sun4c_probe_vac(void);
187extern char cputypval;
188extern unsigned long start, end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190extern unsigned short root_flags;
191extern unsigned short root_dev;
192extern unsigned short ram_flags;
193#define RAMDISK_IMAGE_START_MASK 0x07FF
194#define RAMDISK_PROMPT_FLAG 0x8000
195#define RAMDISK_LOAD_FLAG 0x4000
196
197extern int root_mountflags;
198
199char reboot_command[COMMAND_LINE_SIZE];
Sam Ravnborg6943f3d2009-01-08 16:58:05 -0800200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201enum sparc_cpu sparc_cpu_model;
Sam Ravnborg6943f3d2009-01-08 16:58:05 -0800202EXPORT_SYMBOL(sparc_cpu_model);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
204struct tt_entry *sparc_ttable;
205
206struct pt_regs fake_swapper_regs;
207
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208void __init setup_arch(char **cmdline_p)
209{
210 int i;
211 unsigned long highest_paddr;
212
213 sparc_ttable = (struct tt_entry *) &start;
214
215 /* Initialize PROM console and command line. */
216 *cmdline_p = prom_getbootargs();
Alon Bar-Lev08e7ca12007-02-12 00:54:21 -0800217 strcpy(boot_command_line, *cmdline_p);
David S. Miller3fbe36d2008-09-10 23:40:32 -0700218 parse_early_param();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
220 /* Set sparc_cpu_model */
221 sparc_cpu_model = sun_unknown;
David S. Miller365b50f2008-09-02 01:13:31 -0700222 if (!strcmp(&cputypval,"sun4 "))
223 sparc_cpu_model = sun4;
224 if (!strcmp(&cputypval,"sun4c"))
225 sparc_cpu_model = sun4c;
226 if (!strcmp(&cputypval,"sun4m"))
227 sparc_cpu_model = sun4m;
228 if (!strcmp(&cputypval,"sun4s"))
229 sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
230 if (!strcmp(&cputypval,"sun4d"))
231 sparc_cpu_model = sun4d;
232 if (!strcmp(&cputypval,"sun4e"))
233 sparc_cpu_model = sun4e;
234 if (!strcmp(&cputypval,"sun4u"))
235 sparc_cpu_model = sun4u;
Konrad Eisele0fd7ef12009-08-17 00:13:31 +0000236 if (!strncmp(&cputypval, "leon" , 4))
237 sparc_cpu_model = sparc_leon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 printk("ARCH: ");
240 switch(sparc_cpu_model) {
241 case sun4:
242 printk("SUN4\n");
243 break;
244 case sun4c:
245 printk("SUN4C\n");
246 break;
247 case sun4m:
248 printk("SUN4M\n");
249 break;
250 case sun4d:
251 printk("SUN4D\n");
252 break;
253 case sun4e:
254 printk("SUN4E\n");
255 break;
256 case sun4u:
257 printk("SUN4U\n");
258 break;
Konrad Eisele0fd7ef12009-08-17 00:13:31 +0000259 case sparc_leon:
260 printk("LEON\n");
261 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 default:
263 printk("UNKNOWN!\n");
264 break;
265 };
266
267#ifdef CONFIG_DUMMY_CONSOLE
268 conswitchp = &dummy_con;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269#endif
270 boot_flags_init(*cmdline_p);
271
272 idprom_init();
Adrian Bunk5110bd22008-08-31 20:59:37 -0700273 if (ARCH_SUN4C)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 sun4c_probe_vac();
275 load_mmu();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
277 phys_base = 0xffffffffUL;
278 highest_paddr = 0UL;
279 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
280 unsigned long top;
281
282 if (sp_banks[i].base_addr < phys_base)
283 phys_base = sp_banks[i].base_addr;
284 top = sp_banks[i].base_addr +
285 sp_banks[i].num_bytes;
286 if (highest_paddr < top)
287 highest_paddr = top;
288 }
289 pfn_base = phys_base >> PAGE_SHIFT;
290
291 if (!root_flags)
292 root_mountflags &= ~MS_RDONLY;
293 ROOT_DEV = old_decode_dev(root_dev);
Al Viro5d2170a2006-06-22 14:47:14 -0700294#ifdef CONFIG_BLK_DEV_RAM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
296 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
297 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
298#endif
299
300 prom_setsync(prom_sync_me);
301
302 if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
303 ((*(short *)linux_dbvec) != -1)) {
304 printk("Booted under KADB. Syncing trap table.\n");
305 (*(linux_dbvec->teach_debugger))();
306 }
307
308 init_mm.context = (unsigned long) NO_CONTEXT;
309 init_task.thread.kregs = &fake_swapper_regs;
310
311 paging_init();
Krzysztof Helta23b4232006-08-25 00:46:02 -0700312
313 smp_setup_cpu_possible_map();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314}
315
Bob Breuera8cbdce2006-06-20 00:28:33 -0700316static int ncpus_probed;
317
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318static int show_cpuinfo(struct seq_file *m, void *__unused)
319{
320 seq_printf(m,
321 "cpu\t\t: %s\n"
322 "fpu\t\t: %s\n"
323 "promlib\t\t: Version %d Revision %d\n"
324 "prom\t\t: %d.%d\n"
325 "type\t\t: %s\n"
326 "ncpus probed\t: %d\n"
327 "ncpus active\t: %d\n"
328#ifndef CONFIG_SMP
329 "CPU0Bogo\t: %lu.%02lu\n"
330 "CPU0ClkTck\t: %ld\n"
331#endif
332 ,
Sam Ravnborg6c6bd8b2008-12-05 19:08:22 -0800333 sparc_cpu_type,
334 sparc_fpu_type ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 romvec->pv_romvers,
336 prom_rev,
337 romvec->pv_printrev >> 16,
338 romvec->pv_printrev & 0xffff,
339 &cputypval,
Bob Breuera8cbdce2006-06-20 00:28:33 -0700340 ncpus_probed,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 num_online_cpus()
342#ifndef CONFIG_SMP
343 , cpu_data(0).udelay_val/(500000/HZ),
344 (cpu_data(0).udelay_val/(5000/HZ)) % 100,
345 cpu_data(0).clock_tick
346#endif
347 );
348
349#ifdef CONFIG_SMP
350 smp_bogo(m);
351#endif
352 mmu_info(m);
353#ifdef CONFIG_SMP
354 smp_info(m);
355#endif
356 return 0;
357}
358
359static void *c_start(struct seq_file *m, loff_t *pos)
360{
361 /* The pointer we are returning is arbitrary,
362 * it just has to be non-NULL and not IS_ERR
363 * in the success case.
364 */
365 return *pos == 0 ? &c_start : NULL;
366}
367
368static void *c_next(struct seq_file *m, void *v, loff_t *pos)
369{
370 ++*pos;
371 return c_start(m, pos);
372}
373
374static void c_stop(struct seq_file *m, void *v)
375{
376}
377
Jan Engelhardt872e2be2008-01-22 18:29:20 -0800378const struct seq_operations cpuinfo_op = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 .start =c_start,
380 .next = c_next,
381 .stop = c_stop,
382 .show = show_cpuinfo,
383};
384
385extern int stop_a_enabled;
386
387void sun_do_break(void)
388{
389 if (!stop_a_enabled)
390 return;
391
392 printk("\n");
393 flush_user_windows();
394
395 prom_cmdline();
396}
Sam Ravnborg6943f3d2009-01-08 16:58:05 -0800397EXPORT_SYMBOL(sun_do_break);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399int stop_a_enabled = 1;
Bob Breuera8cbdce2006-06-20 00:28:33 -0700400
401static int __init topology_init(void)
402{
403 int i, ncpus, err;
404
405 /* Count the number of physically present processors in
406 * the machine, even on uniprocessor, so that /proc/cpuinfo
407 * output is consistent with 2.4.x
408 */
409 ncpus = 0;
410 while (!cpu_find_by_instance(ncpus, NULL, NULL))
411 ncpus++;
412 ncpus_probed = ncpus;
413
414 err = 0;
415 for_each_online_cpu(i) {
416 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
417 if (!p)
418 err = -ENOMEM;
419 else
Andrew Morton94583772006-06-29 02:24:27 -0700420 register_cpu(p, i);
Bob Breuera8cbdce2006-06-20 00:28:33 -0700421 }
422
423 return err;
424}
425
426subsys_initcall(topology_init);