[SPARC]: remove use of asm/segment.h
[linux-2.6.git] / arch / sparc / kernel / setup.c
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>
20 #include <linux/tty.h>
21 #include <linux/delay.h>
22 #include <linux/config.h>
23 #include <linux/fs.h>
24 #include <linux/seq_file.h>
25 #include <linux/syscalls.h>
26 #include <linux/kdev_t.h>
27 #include <linux/major.h>
28 #include <linux/string.h>
29 #include <linux/init.h>
30 #include <linux/interrupt.h>
31 #include <linux/console.h>
32 #include <linux/spinlock.h>
33 #include <linux/root_dev.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/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
50 struct 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
68 extern unsigned long trapbase;
69 void (*prom_palette)(int);
70
71 /* Pretty sick eh? */
72 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         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
104 unsigned int boot_flags __initdata = 0;
105 #define BOOTME_DEBUG  0x1
106 #define BOOTME_SINGLE 0x2
107
108 /* Exported for mm/init.c:paging_init. */
109 unsigned long cmdline_memory_size __initdata = 0;
110
111 static void
112 prom_console_write(struct console *con, const char *s, unsigned n)
113 {
114         prom_write(s, n);
115 }
116
117 static struct console prom_debug_console = {
118         .name =         "debug",
119         .write =        prom_console_write,
120         .flags =        CON_PRINTBUFFER,
121         .index =        -1,
122 };
123
124 int obp_system_intr(void)
125 {
126         if (boot_flags & BOOTME_DEBUG) {
127                 printk("OBP: system interrupted\n");
128                 prom_halt();
129                 return 1;
130         }
131         return 0;
132 }
133
134 /* 
135  * Process kernel command line switches that are specific to the
136  * SPARC or that require special low-level processing.
137  */
138 static void __init process_switch(char c)
139 {
140         switch (c) {
141         case 'd':
142                 boot_flags |= BOOTME_DEBUG;
143                 break;
144         case 's':
145                 boot_flags |= BOOTME_SINGLE;
146                 break;
147         case 'h':
148                 prom_printf("boot_flags_init: Halt!\n");
149                 prom_halt();
150                 break;
151         case 'p':
152                 /* Use PROM debug console. */
153                 register_console(&prom_debug_console);
154                 break;
155         default:
156                 printk("Unknown boot switch (-%c)\n", c);
157                 break;
158         }
159 }
160
161 static void __init process_console(char *commands)
162 {
163         serial_console = 0;
164         commands += 8;
165         /* Linux-style serial */
166         if (!strncmp(commands, "ttyS", 4))
167                 serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
168         else if (!strncmp(commands, "tty", 3)) {
169                 char c = *(commands + 3);
170                 /* Solaris-style serial */
171                 if (c == 'a' || c == 'b')
172                         serial_console = c - 'a' + 1;
173                 /* else Linux-style fbcon, not serial */
174         }
175 #if defined(CONFIG_PROM_CONSOLE)
176         if (!strncmp(commands, "prom", 4)) {
177                 char *p;
178
179                 for (p = commands - 8; *p && *p != ' '; p++)
180                         *p = ' ';
181                 conswitchp = &prom_con;
182         }
183 #endif
184 }
185
186 static void __init boot_flags_init(char *commands)
187 {
188         while (*commands) {
189                 /* Move to the start of the next "argument". */
190                 while (*commands && *commands == ' ')
191                         commands++;
192
193                 /* Process any command switches, otherwise skip it. */
194                 if (*commands == '\0')
195                         break;
196                 if (*commands == '-') {
197                         commands++;
198                         while (*commands && *commands != ' ')
199                                 process_switch(*commands++);
200                         continue;
201                 }
202                 if (!strncmp(commands, "console=", 8)) {
203                         process_console(commands);
204                 } else if (!strncmp(commands, "mem=", 4)) {
205                         /*
206                          * "mem=XXX[kKmM] overrides the PROM-reported
207                          * memory size.
208                          */
209                         cmdline_memory_size = simple_strtoul(commands + 4,
210                                                      &commands, 0);
211                         if (*commands == 'K' || *commands == 'k') {
212                                 cmdline_memory_size <<= 10;
213                                 commands++;
214                         } else if (*commands=='M' || *commands=='m') {
215                                 cmdline_memory_size <<= 20;
216                                 commands++;
217                         }
218                 }
219                 while (*commands && *commands != ' ')
220                         commands++;
221         }
222 }
223
224 /* This routine will in the future do all the nasty prom stuff
225  * to probe for the mmu type and its parameters, etc. This will
226  * also be where SMP things happen plus the Sparc specific memory
227  * physical memory probe as on the alpha.
228  */
229
230 extern int prom_probe_memory(void);
231 extern void sun4c_probe_vac(void);
232 extern char cputypval;
233 extern unsigned long start, end;
234 extern void panic_setup(char *, int *);
235
236 extern unsigned short root_flags;
237 extern unsigned short root_dev;
238 extern unsigned short ram_flags;
239 #define RAMDISK_IMAGE_START_MASK        0x07FF
240 #define RAMDISK_PROMPT_FLAG             0x8000
241 #define RAMDISK_LOAD_FLAG               0x4000
242
243 extern int root_mountflags;
244
245 char reboot_command[COMMAND_LINE_SIZE];
246 enum sparc_cpu sparc_cpu_model;
247
248 struct tt_entry *sparc_ttable;
249
250 struct pt_regs fake_swapper_regs;
251
252 extern void paging_init(void);
253
254 void __init setup_arch(char **cmdline_p)
255 {
256         int i;
257         unsigned long highest_paddr;
258
259         sparc_ttable = (struct tt_entry *) &start;
260
261         /* Initialize PROM console and command line. */
262         *cmdline_p = prom_getbootargs();
263         strcpy(saved_command_line, *cmdline_p);
264
265         /* Set sparc_cpu_model */
266         sparc_cpu_model = sun_unknown;
267         if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; }
268         if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; }
269         if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; }
270         if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; }  /* CP-1200 with PROM 2.30 -E */
271         if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; }
272         if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; }
273         if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; }
274
275 #ifdef CONFIG_SUN4
276         if (sparc_cpu_model != sun4) {
277                 prom_printf("This kernel is for Sun4 architecture only.\n");
278                 prom_halt();
279         }
280 #endif
281         printk("ARCH: ");
282         switch(sparc_cpu_model) {
283         case sun4:
284                 printk("SUN4\n");
285                 break;
286         case sun4c:
287                 printk("SUN4C\n");
288                 break;
289         case sun4m:
290                 printk("SUN4M\n");
291                 break;
292         case sun4d:
293                 printk("SUN4D\n");
294                 break;
295         case sun4e:
296                 printk("SUN4E\n");
297                 break;
298         case sun4u:
299                 printk("SUN4U\n");
300                 break;
301         default:
302                 printk("UNKNOWN!\n");
303                 break;
304         };
305
306 #ifdef CONFIG_DUMMY_CONSOLE
307         conswitchp = &dummy_con;
308 #elif defined(CONFIG_PROM_CONSOLE)
309         conswitchp = &prom_con;
310 #endif
311         boot_flags_init(*cmdline_p);
312
313         idprom_init();
314         if (ARCH_SUN4C_SUN4)
315                 sun4c_probe_vac();
316         load_mmu();
317         (void) prom_probe_memory();
318
319         phys_base = 0xffffffffUL;
320         highest_paddr = 0UL;
321         for (i = 0; sp_banks[i].num_bytes != 0; i++) {
322                 unsigned long top;
323
324                 if (sp_banks[i].base_addr < phys_base)
325                         phys_base = sp_banks[i].base_addr;
326                 top = sp_banks[i].base_addr +
327                         sp_banks[i].num_bytes;
328                 if (highest_paddr < top)
329                         highest_paddr = top;
330         }
331         pfn_base = phys_base >> PAGE_SHIFT;
332
333         if (!root_flags)
334                 root_mountflags &= ~MS_RDONLY;
335         ROOT_DEV = old_decode_dev(root_dev);
336 #ifdef CONFIG_BLK_DEV_INITRD
337         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
338         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
339         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);     
340 #endif
341
342         prom_setsync(prom_sync_me);
343
344         if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && 
345            ((*(short *)linux_dbvec) != -1)) {
346                 printk("Booted under KADB. Syncing trap table.\n");
347                 (*(linux_dbvec->teach_debugger))();
348         }
349
350         init_mm.context = (unsigned long) NO_CONTEXT;
351         init_task.thread.kregs = &fake_swapper_regs;
352
353         paging_init();
354 }
355
356 static int __init set_preferred_console(void)
357 {
358         int idev, odev;
359
360         /* The user has requested a console so this is already set up. */
361         if (serial_console >= 0)
362                 return -EBUSY;
363
364         idev = prom_query_input_device();
365         odev = prom_query_output_device();
366         if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
367                 serial_console = 0;
368         } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
369                 serial_console = 1;
370         } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
371                 serial_console = 2;
372         } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) {
373                 prom_printf("MrCoffee ttya\n");
374                 serial_console = 1;
375         } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) {
376                 serial_console = 0;
377                 prom_printf("MrCoffee keyboard\n");
378         } else {
379                 prom_printf("Confusing console (idev %d, odev %d)\n",
380                     idev, odev);
381                 serial_console = 1;
382         }
383
384         if (serial_console)
385                 return add_preferred_console("ttyS", serial_console - 1, NULL);
386
387         return -ENODEV;
388 }
389 console_initcall(set_preferred_console);
390
391 extern char *sparc_cpu_type;
392 extern char *sparc_fpu_type;
393
394 static int show_cpuinfo(struct seq_file *m, void *__unused)
395 {
396         seq_printf(m,
397                    "cpu\t\t: %s\n"
398                    "fpu\t\t: %s\n"
399                    "promlib\t\t: Version %d Revision %d\n"
400                    "prom\t\t: %d.%d\n"
401                    "type\t\t: %s\n"
402                    "ncpus probed\t: %d\n"
403                    "ncpus active\t: %d\n"
404 #ifndef CONFIG_SMP
405                    "CPU0Bogo\t: %lu.%02lu\n"
406                    "CPU0ClkTck\t: %ld\n"
407 #endif
408                    ,
409                    sparc_cpu_type ? sparc_cpu_type : "undetermined",
410                    sparc_fpu_type ? sparc_fpu_type : "undetermined",
411                    romvec->pv_romvers,
412                    prom_rev,
413                    romvec->pv_printrev >> 16,
414                    romvec->pv_printrev & 0xffff,
415                    &cputypval,
416                    num_possible_cpus(),
417                    num_online_cpus()
418 #ifndef CONFIG_SMP
419                    , cpu_data(0).udelay_val/(500000/HZ),
420                    (cpu_data(0).udelay_val/(5000/HZ)) % 100,
421                    cpu_data(0).clock_tick
422 #endif
423                 );
424
425 #ifdef CONFIG_SMP
426         smp_bogo(m);
427 #endif
428         mmu_info(m);
429 #ifdef CONFIG_SMP
430         smp_info(m);
431 #endif
432         return 0;
433 }
434
435 static void *c_start(struct seq_file *m, loff_t *pos)
436 {
437         /* The pointer we are returning is arbitrary,
438          * it just has to be non-NULL and not IS_ERR
439          * in the success case.
440          */
441         return *pos == 0 ? &c_start : NULL;
442 }
443
444 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
445 {
446         ++*pos;
447         return c_start(m, pos);
448 }
449
450 static void c_stop(struct seq_file *m, void *v)
451 {
452 }
453
454 struct seq_operations cpuinfo_op = {
455         .start =c_start,
456         .next = c_next,
457         .stop = c_stop,
458         .show = show_cpuinfo,
459 };
460
461 extern int stop_a_enabled;
462
463 void sun_do_break(void)
464 {
465         if (!stop_a_enabled)
466                 return;
467
468         printk("\n");
469         flush_user_windows();
470
471         prom_cmdline();
472 }
473
474 int serial_console = -1;
475 int stop_a_enabled = 1;