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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> |
1eeb66a1 | 34 | #include <linux/kdebug.h> |
1da177e4 | 35 | |
1da177e4 LT |
36 | #include <asm/system.h> |
37 | #include <asm/io.h> | |
38 | #include <asm/processor.h> | |
39 | #include <asm/oplib.h> | |
40 | #include <asm/page.h> | |
41 | #include <asm/pgtable.h> | |
42 | #include <asm/traps.h> | |
43 | #include <asm/vaddrs.h> | |
1da177e4 LT |
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 | |
1da177e4 LT |
106 | |
107 | /* Exported for mm/init.c:paging_init. */ | |
108 | unsigned long cmdline_memory_size __initdata = 0; | |
109 | ||
110 | static void | |
111 | prom_console_write(struct console *con, const char *s, unsigned n) | |
112 | { | |
113 | prom_write(s, n); | |
114 | } | |
115 | ||
116 | static 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 | */ | |
127 | static 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 | ||
1da177e4 LT |
149 | static void __init boot_flags_init(char *commands) |
150 | { | |
151 | while (*commands) { | |
152 | /* Move to the start of the next "argument". */ | |
153 | while (*commands && *commands == ' ') | |
154 | commands++; | |
155 | ||
156 | /* Process any command switches, otherwise skip it. */ | |
157 | if (*commands == '\0') | |
158 | break; | |
159 | if (*commands == '-') { | |
160 | commands++; | |
161 | while (*commands && *commands != ' ') | |
162 | process_switch(*commands++); | |
163 | continue; | |
164 | } | |
c73fcc84 | 165 | if (!strncmp(commands, "mem=", 4)) { |
1da177e4 LT |
166 | /* |
167 | * "mem=XXX[kKmM] overrides the PROM-reported | |
168 | * memory size. | |
169 | */ | |
170 | cmdline_memory_size = simple_strtoul(commands + 4, | |
171 | &commands, 0); | |
172 | if (*commands == 'K' || *commands == 'k') { | |
173 | cmdline_memory_size <<= 10; | |
174 | commands++; | |
175 | } else if (*commands=='M' || *commands=='m') { | |
176 | cmdline_memory_size <<= 20; | |
177 | commands++; | |
178 | } | |
179 | } | |
180 | while (*commands && *commands != ' ') | |
181 | commands++; | |
182 | } | |
183 | } | |
184 | ||
185 | /* This routine will in the future do all the nasty prom stuff | |
186 | * to probe for the mmu type and its parameters, etc. This will | |
187 | * also be where SMP things happen plus the Sparc specific memory | |
188 | * physical memory probe as on the alpha. | |
189 | */ | |
190 | ||
191 | extern int prom_probe_memory(void); | |
192 | extern void sun4c_probe_vac(void); | |
193 | extern char cputypval; | |
194 | extern unsigned long start, end; | |
195 | extern void panic_setup(char *, int *); | |
196 | ||
197 | extern unsigned short root_flags; | |
198 | extern unsigned short root_dev; | |
199 | extern unsigned short ram_flags; | |
200 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
201 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
202 | #define RAMDISK_LOAD_FLAG 0x4000 | |
203 | ||
204 | extern int root_mountflags; | |
205 | ||
206 | char reboot_command[COMMAND_LINE_SIZE]; | |
207 | enum sparc_cpu sparc_cpu_model; | |
208 | ||
209 | struct tt_entry *sparc_ttable; | |
210 | ||
211 | struct pt_regs fake_swapper_regs; | |
212 | ||
1da177e4 LT |
213 | void __init setup_arch(char **cmdline_p) |
214 | { | |
215 | int i; | |
216 | unsigned long highest_paddr; | |
217 | ||
218 | sparc_ttable = (struct tt_entry *) &start; | |
219 | ||
220 | /* Initialize PROM console and command line. */ | |
221 | *cmdline_p = prom_getbootargs(); | |
08e7ca11 | 222 | strcpy(boot_command_line, *cmdline_p); |
1da177e4 LT |
223 | |
224 | /* Set sparc_cpu_model */ | |
225 | sparc_cpu_model = sun_unknown; | |
226 | if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; } | |
227 | if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; } | |
228 | if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; } | |
229 | if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; } /* CP-1200 with PROM 2.30 -E */ | |
230 | if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; } | |
231 | if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; } | |
232 | if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; } | |
233 | ||
234 | #ifdef CONFIG_SUN4 | |
235 | if (sparc_cpu_model != sun4) { | |
236 | prom_printf("This kernel is for Sun4 architecture only.\n"); | |
237 | prom_halt(); | |
238 | } | |
239 | #endif | |
240 | printk("ARCH: "); | |
241 | switch(sparc_cpu_model) { | |
242 | case sun4: | |
243 | printk("SUN4\n"); | |
244 | break; | |
245 | case sun4c: | |
246 | printk("SUN4C\n"); | |
247 | break; | |
248 | case sun4m: | |
249 | printk("SUN4M\n"); | |
250 | break; | |
251 | case sun4d: | |
252 | printk("SUN4D\n"); | |
253 | break; | |
254 | case sun4e: | |
255 | printk("SUN4E\n"); | |
256 | break; | |
257 | case sun4u: | |
258 | printk("SUN4U\n"); | |
259 | break; | |
260 | default: | |
261 | printk("UNKNOWN!\n"); | |
262 | break; | |
263 | }; | |
264 | ||
265 | #ifdef CONFIG_DUMMY_CONSOLE | |
266 | conswitchp = &dummy_con; | |
267 | #elif defined(CONFIG_PROM_CONSOLE) | |
268 | conswitchp = &prom_con; | |
269 | #endif | |
270 | boot_flags_init(*cmdline_p); | |
271 | ||
272 | idprom_init(); | |
273 | if (ARCH_SUN4C_SUN4) | |
274 | sun4c_probe_vac(); | |
275 | load_mmu(); | |
276 | (void) prom_probe_memory(); | |
277 | ||
278 | phys_base = 0xffffffffUL; | |
279 | highest_paddr = 0UL; | |
280 | for (i = 0; sp_banks[i].num_bytes != 0; i++) { | |
281 | unsigned long top; | |
282 | ||
283 | if (sp_banks[i].base_addr < phys_base) | |
284 | phys_base = sp_banks[i].base_addr; | |
285 | top = sp_banks[i].base_addr + | |
286 | sp_banks[i].num_bytes; | |
287 | if (highest_paddr < top) | |
288 | highest_paddr = top; | |
289 | } | |
290 | pfn_base = phys_base >> PAGE_SHIFT; | |
291 | ||
292 | if (!root_flags) | |
293 | root_mountflags &= ~MS_RDONLY; | |
294 | ROOT_DEV = old_decode_dev(root_dev); | |
5d2170ad | 295 | #ifdef CONFIG_BLK_DEV_RAM |
1da177e4 LT |
296 | rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; |
297 | rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0); | |
298 | rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0); | |
299 | #endif | |
300 | ||
301 | prom_setsync(prom_sync_me); | |
302 | ||
303 | if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && | |
304 | ((*(short *)linux_dbvec) != -1)) { | |
305 | printk("Booted under KADB. Syncing trap table.\n"); | |
306 | (*(linux_dbvec->teach_debugger))(); | |
307 | } | |
308 | ||
309 | init_mm.context = (unsigned long) NO_CONTEXT; | |
310 | init_task.thread.kregs = &fake_swapper_regs; | |
311 | ||
312 | paging_init(); | |
a23b423e KH |
313 | |
314 | smp_setup_cpu_possible_map(); | |
1da177e4 LT |
315 | } |
316 | ||
1da177e4 LT |
317 | extern char *sparc_cpu_type; |
318 | extern char *sparc_fpu_type; | |
319 | ||
a8cbdcea BB |
320 | static int ncpus_probed; |
321 | ||
1da177e4 LT |
322 | static int show_cpuinfo(struct seq_file *m, void *__unused) |
323 | { | |
324 | seq_printf(m, | |
325 | "cpu\t\t: %s\n" | |
326 | "fpu\t\t: %s\n" | |
327 | "promlib\t\t: Version %d Revision %d\n" | |
328 | "prom\t\t: %d.%d\n" | |
329 | "type\t\t: %s\n" | |
330 | "ncpus probed\t: %d\n" | |
331 | "ncpus active\t: %d\n" | |
332 | #ifndef CONFIG_SMP | |
333 | "CPU0Bogo\t: %lu.%02lu\n" | |
334 | "CPU0ClkTck\t: %ld\n" | |
335 | #endif | |
336 | , | |
337 | sparc_cpu_type ? sparc_cpu_type : "undetermined", | |
338 | sparc_fpu_type ? sparc_fpu_type : "undetermined", | |
339 | romvec->pv_romvers, | |
340 | prom_rev, | |
341 | romvec->pv_printrev >> 16, | |
342 | romvec->pv_printrev & 0xffff, | |
343 | &cputypval, | |
a8cbdcea | 344 | ncpus_probed, |
1da177e4 LT |
345 | num_online_cpus() |
346 | #ifndef CONFIG_SMP | |
347 | , cpu_data(0).udelay_val/(500000/HZ), | |
348 | (cpu_data(0).udelay_val/(5000/HZ)) % 100, | |
349 | cpu_data(0).clock_tick | |
350 | #endif | |
351 | ); | |
352 | ||
353 | #ifdef CONFIG_SMP | |
354 | smp_bogo(m); | |
355 | #endif | |
356 | mmu_info(m); | |
357 | #ifdef CONFIG_SMP | |
358 | smp_info(m); | |
359 | #endif | |
360 | return 0; | |
361 | } | |
362 | ||
363 | static void *c_start(struct seq_file *m, loff_t *pos) | |
364 | { | |
365 | /* The pointer we are returning is arbitrary, | |
366 | * it just has to be non-NULL and not IS_ERR | |
367 | * in the success case. | |
368 | */ | |
369 | return *pos == 0 ? &c_start : NULL; | |
370 | } | |
371 | ||
372 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
373 | { | |
374 | ++*pos; | |
375 | return c_start(m, pos); | |
376 | } | |
377 | ||
378 | static void c_stop(struct seq_file *m, void *v) | |
379 | { | |
380 | } | |
381 | ||
382 | struct seq_operations cpuinfo_op = { | |
383 | .start =c_start, | |
384 | .next = c_next, | |
385 | .stop = c_stop, | |
386 | .show = show_cpuinfo, | |
387 | }; | |
388 | ||
389 | extern int stop_a_enabled; | |
390 | ||
391 | void sun_do_break(void) | |
392 | { | |
393 | if (!stop_a_enabled) | |
394 | return; | |
395 | ||
396 | printk("\n"); | |
397 | flush_user_windows(); | |
398 | ||
399 | prom_cmdline(); | |
400 | } | |
401 | ||
1da177e4 | 402 | int stop_a_enabled = 1; |
a8cbdcea BB |
403 | |
404 | static int __init topology_init(void) | |
405 | { | |
406 | int i, ncpus, err; | |
407 | ||
408 | /* Count the number of physically present processors in | |
409 | * the machine, even on uniprocessor, so that /proc/cpuinfo | |
410 | * output is consistent with 2.4.x | |
411 | */ | |
412 | ncpus = 0; | |
413 | while (!cpu_find_by_instance(ncpus, NULL, NULL)) | |
414 | ncpus++; | |
415 | ncpus_probed = ncpus; | |
416 | ||
417 | err = 0; | |
418 | for_each_online_cpu(i) { | |
419 | struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); | |
420 | if (!p) | |
421 | err = -ENOMEM; | |
422 | else | |
94583779 | 423 | register_cpu(p, i); |
a8cbdcea BB |
424 | } |
425 | ||
426 | return err; | |
427 | } | |
428 | ||
429 | subsys_initcall(topology_init); |