]> git.karo-electronics.de Git - mv-sheeva.git/blob - arch/sparc/kernel/setup_32.c
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec...
[mv-sheeva.git] / arch / sparc / kernel / setup_32.c
1 /*
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/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/interrupt.h>
29 #include <linux/console.h>
30 #include <linux/spinlock.h>
31 #include <linux/root_dev.h>
32 #include <linux/cpu.h>
33 #include <linux/kdebug.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/traps.h>
42 #include <asm/vaddrs.h>
43 #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
49 #include "kernel.h"
50
51 struct 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
69 extern unsigned long trapbase;
70
71 /* Pretty sick eh? */
72 static void 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         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);
98
99         return;
100 }
101
102 static unsigned int boot_flags __initdata = 0;
103 #define BOOTME_DEBUG  0x1
104
105 /* Exported for mm/init.c:paging_init. */
106 unsigned long cmdline_memory_size __initdata = 0;
107
108 static void
109 prom_console_write(struct console *con, const char *s, unsigned n)
110 {
111         prom_write(s, n);
112 }
113
114 static struct console prom_debug_console = {
115         .name =         "debug",
116         .write =        prom_console_write,
117         .flags =        CON_PRINTBUFFER,
118         .index =        -1,
119 };
120
121 /* 
122  * Process kernel command line switches that are specific to the
123  * SPARC or that require special low-level processing.
124  */
125 static void __init process_switch(char c)
126 {
127         switch (c) {
128         case 'd':
129                 boot_flags |= BOOTME_DEBUG;
130                 break;
131         case 's':
132                 break;
133         case 'h':
134                 prom_printf("boot_flags_init: Halt!\n");
135                 prom_halt();
136                 break;
137         case 'p':
138                 /* Use PROM debug console. */
139                 register_console(&prom_debug_console);
140                 break;
141         default:
142                 printk("Unknown boot switch (-%c)\n", c);
143                 break;
144         }
145 }
146
147 static void __init boot_flags_init(char *commands)
148 {
149         while (*commands) {
150                 /* Move to the start of the next "argument". */
151                 while (*commands && *commands == ' ')
152                         commands++;
153
154                 /* Process any command switches, otherwise skip it. */
155                 if (*commands == '\0')
156                         break;
157                 if (*commands == '-') {
158                         commands++;
159                         while (*commands && *commands != ' ')
160                                 process_switch(*commands++);
161                         continue;
162                 }
163                 if (!strncmp(commands, "mem=", 4)) {
164                         /*
165                          * "mem=XXX[kKmM] overrides the PROM-reported
166                          * memory size.
167                          */
168                         cmdline_memory_size = simple_strtoul(commands + 4,
169                                                      &commands, 0);
170                         if (*commands == 'K' || *commands == 'k') {
171                                 cmdline_memory_size <<= 10;
172                                 commands++;
173                         } else if (*commands=='M' || *commands=='m') {
174                                 cmdline_memory_size <<= 20;
175                                 commands++;
176                         }
177                 }
178                 while (*commands && *commands != ' ')
179                         commands++;
180         }
181 }
182
183 /* This routine will in the future do all the nasty prom stuff
184  * to probe for the mmu type and its parameters, etc. This will
185  * also be where SMP things happen.
186  */
187
188 extern void sun4c_probe_vac(void);
189 extern char cputypval;
190 extern unsigned long start, end;
191
192 extern unsigned short root_flags;
193 extern unsigned short root_dev;
194 extern unsigned short ram_flags;
195 #define RAMDISK_IMAGE_START_MASK        0x07FF
196 #define RAMDISK_PROMPT_FLAG             0x8000
197 #define RAMDISK_LOAD_FLAG               0x4000
198
199 extern int root_mountflags;
200
201 char reboot_command[COMMAND_LINE_SIZE];
202
203 enum sparc_cpu sparc_cpu_model;
204 EXPORT_SYMBOL(sparc_cpu_model);
205
206 struct tt_entry *sparc_ttable;
207
208 struct pt_regs fake_swapper_regs;
209
210 void __init setup_arch(char **cmdline_p)
211 {
212         int i;
213         unsigned long highest_paddr;
214
215         sparc_ttable = (struct tt_entry *) &start;
216
217         /* Initialize PROM console and command line. */
218         *cmdline_p = prom_getbootargs();
219         strcpy(boot_command_line, *cmdline_p);
220         parse_early_param();
221
222         /* Set sparc_cpu_model */
223         sparc_cpu_model = sun_unknown;
224         if (!strcmp(&cputypval,"sun4 "))
225                 sparc_cpu_model = sun4;
226         if (!strcmp(&cputypval,"sun4c"))
227                 sparc_cpu_model = sun4c;
228         if (!strcmp(&cputypval,"sun4m"))
229                 sparc_cpu_model = sun4m;
230         if (!strcmp(&cputypval,"sun4s"))
231                 sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
232         if (!strcmp(&cputypval,"sun4d"))
233                 sparc_cpu_model = sun4d;
234         if (!strcmp(&cputypval,"sun4e"))
235                 sparc_cpu_model = sun4e;
236         if (!strcmp(&cputypval,"sun4u"))
237                 sparc_cpu_model = sun4u;
238         if (!strncmp(&cputypval, "leon" , 4))
239                 sparc_cpu_model = sparc_leon;
240
241         printk("ARCH: ");
242         switch(sparc_cpu_model) {
243         case sun4:
244                 printk("SUN4\n");
245                 break;
246         case sun4c:
247                 printk("SUN4C\n");
248                 break;
249         case sun4m:
250                 printk("SUN4M\n");
251                 break;
252         case sun4d:
253                 printk("SUN4D\n");
254                 break;
255         case sun4e:
256                 printk("SUN4E\n");
257                 break;
258         case sun4u:
259                 printk("SUN4U\n");
260                 break;
261         case sparc_leon:
262                 printk("LEON\n");
263                 break;
264         default:
265                 printk("UNKNOWN!\n");
266                 break;
267         };
268
269 #ifdef CONFIG_DUMMY_CONSOLE
270         conswitchp = &dummy_con;
271 #endif
272         boot_flags_init(*cmdline_p);
273
274         idprom_init();
275         if (ARCH_SUN4C)
276                 sun4c_probe_vac();
277         load_mmu();
278
279         phys_base = 0xffffffffUL;
280         highest_paddr = 0UL;
281         for (i = 0; sp_banks[i].num_bytes != 0; i++) {
282                 unsigned long top;
283
284                 if (sp_banks[i].base_addr < phys_base)
285                         phys_base = sp_banks[i].base_addr;
286                 top = sp_banks[i].base_addr +
287                         sp_banks[i].num_bytes;
288                 if (highest_paddr < top)
289                         highest_paddr = top;
290         }
291         pfn_base = phys_base >> PAGE_SHIFT;
292
293         if (!root_flags)
294                 root_mountflags &= ~MS_RDONLY;
295         ROOT_DEV = old_decode_dev(root_dev);
296 #ifdef CONFIG_BLK_DEV_RAM
297         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
298         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
299         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);     
300 #endif
301
302         prom_setsync(prom_sync_me);
303
304         if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && 
305            ((*(short *)linux_dbvec) != -1)) {
306                 printk("Booted under KADB. Syncing trap table.\n");
307                 (*(linux_dbvec->teach_debugger))();
308         }
309
310         init_mm.context = (unsigned long) NO_CONTEXT;
311         init_task.thread.kregs = &fake_swapper_regs;
312
313         paging_init();
314
315         smp_setup_cpu_possible_map();
316 }
317
318 static int ncpus_probed;
319
320 static int show_cpuinfo(struct seq_file *m, void *__unused)
321 {
322         seq_printf(m,
323                    "cpu\t\t: %s\n"
324                    "fpu\t\t: %s\n"
325                    "promlib\t\t: Version %d Revision %d\n"
326                    "prom\t\t: %d.%d\n"
327                    "type\t\t: %s\n"
328                    "ncpus probed\t: %d\n"
329                    "ncpus active\t: %d\n"
330 #ifndef CONFIG_SMP
331                    "CPU0Bogo\t: %lu.%02lu\n"
332                    "CPU0ClkTck\t: %ld\n"
333 #endif
334                    ,
335                    sparc_cpu_type,
336                    sparc_fpu_type ,
337                    romvec->pv_romvers,
338                    prom_rev,
339                    romvec->pv_printrev >> 16,
340                    romvec->pv_printrev & 0xffff,
341                    &cputypval,
342                    ncpus_probed,
343                    num_online_cpus()
344 #ifndef CONFIG_SMP
345                    , cpu_data(0).udelay_val/(500000/HZ),
346                    (cpu_data(0).udelay_val/(5000/HZ)) % 100,
347                    cpu_data(0).clock_tick
348 #endif
349                 );
350
351 #ifdef CONFIG_SMP
352         smp_bogo(m);
353 #endif
354         mmu_info(m);
355 #ifdef CONFIG_SMP
356         smp_info(m);
357 #endif
358         return 0;
359 }
360
361 static void *c_start(struct seq_file *m, loff_t *pos)
362 {
363         /* The pointer we are returning is arbitrary,
364          * it just has to be non-NULL and not IS_ERR
365          * in the success case.
366          */
367         return *pos == 0 ? &c_start : NULL;
368 }
369
370 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
371 {
372         ++*pos;
373         return c_start(m, pos);
374 }
375
376 static void c_stop(struct seq_file *m, void *v)
377 {
378 }
379
380 const struct seq_operations cpuinfo_op = {
381         .start =c_start,
382         .next = c_next,
383         .stop = c_stop,
384         .show = show_cpuinfo,
385 };
386
387 extern int stop_a_enabled;
388
389 void sun_do_break(void)
390 {
391         if (!stop_a_enabled)
392                 return;
393
394         printk("\n");
395         flush_user_windows();
396
397         prom_cmdline();
398 }
399 EXPORT_SYMBOL(sun_do_break);
400
401 int stop_a_enabled = 1;
402
403 static int __init topology_init(void)
404 {
405         int i, ncpus, err;
406
407         /* Count the number of physically present processors in
408          * the machine, even on uniprocessor, so that /proc/cpuinfo
409          * output is consistent with 2.4.x
410          */
411         ncpus = 0;
412         while (!cpu_find_by_instance(ncpus, NULL, NULL))
413                 ncpus++;
414         ncpus_probed = ncpus;
415
416         err = 0;
417         for_each_online_cpu(i) {
418                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
419                 if (!p)
420                         err = -ENOMEM;
421                 else
422                         register_cpu(p, i);
423         }
424
425         return err;
426 }
427
428 subsys_initcall(topology_init);