Commit | Line | Data |
---|---|---|
88278ca2 | 1 | /* |
1da177e4 LT |
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> | |
894673ee | 19 | #include <linux/screen_info.h> |
1da177e4 | 20 | #include <linux/delay.h> |
1da177e4 LT |
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> | |
a8cbdcea | 32 | #include <linux/cpu.h> |
1eeb66a1 | 33 | #include <linux/kdebug.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> | |
1da177e4 LT |
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 | struct screen_info screen_info = { | |
50 | 0, 0, /* orig-x, orig-y */ | |
51 | 0, /* unused */ | |
52 | 0, /* orig-video-page */ | |
53 | 0, /* orig-video-mode */ | |
54 | 128, /* orig-video-cols */ | |
55 | 0,0,0, /* ega_ax, ega_bx, ega_cx */ | |
56 | 54, /* orig-video-lines */ | |
57 | 0, /* orig-video-isVGA */ | |
58 | 16 /* orig-video-points */ | |
59 | }; | |
60 | ||
61 | /* Typing sync at the prom prompt calls the function pointed to by | |
62 | * romvec->pv_synchook which I set to the following function. | |
63 | * This should sync all filesystems and return, for now it just | |
64 | * prints out pretty messages and returns. | |
65 | */ | |
66 | ||
67 | extern unsigned long trapbase; | |
1da177e4 LT |
68 | |
69 | /* Pretty sick eh? */ | |
c61c65cd | 70 | static void prom_sync_me(void) |
1da177e4 LT |
71 | { |
72 | unsigned long prom_tbr, flags; | |
73 | ||
74 | /* XXX Badly broken. FIX! - Anton */ | |
75 | local_irq_save(flags); | |
76 | __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr)); | |
77 | __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" | |
78 | "nop\n\t" | |
79 | "nop\n\t" | |
80 | "nop\n\t" : : "r" (&trapbase)); | |
81 | ||
1da177e4 LT |
82 | prom_printf("PROM SYNC COMMAND...\n"); |
83 | show_free_areas(); | |
84 | if(current->pid != 0) { | |
85 | local_irq_enable(); | |
86 | sys_sync(); | |
87 | local_irq_disable(); | |
88 | } | |
89 | prom_printf("Returning to prom\n"); | |
90 | ||
91 | __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" | |
92 | "nop\n\t" | |
93 | "nop\n\t" | |
94 | "nop\n\t" : : "r" (prom_tbr)); | |
95 | local_irq_restore(flags); | |
96 | ||
97 | return; | |
98 | } | |
99 | ||
c61c65cd | 100 | static unsigned int boot_flags __initdata = 0; |
1da177e4 | 101 | #define BOOTME_DEBUG 0x1 |
1da177e4 LT |
102 | |
103 | /* Exported for mm/init.c:paging_init. */ | |
104 | unsigned long cmdline_memory_size __initdata = 0; | |
105 | ||
106 | static void | |
107 | prom_console_write(struct console *con, const char *s, unsigned n) | |
108 | { | |
109 | prom_write(s, n); | |
110 | } | |
111 | ||
112 | static struct console prom_debug_console = { | |
113 | .name = "debug", | |
114 | .write = prom_console_write, | |
115 | .flags = CON_PRINTBUFFER, | |
116 | .index = -1, | |
117 | }; | |
118 | ||
1da177e4 LT |
119 | /* |
120 | * Process kernel command line switches that are specific to the | |
121 | * SPARC or that require special low-level processing. | |
122 | */ | |
123 | static void __init process_switch(char c) | |
124 | { | |
125 | switch (c) { | |
126 | case 'd': | |
127 | boot_flags |= BOOTME_DEBUG; | |
128 | break; | |
129 | case 's': | |
1da177e4 LT |
130 | 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 | ||
1da177e4 LT |
145 | static 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 | } | |
c73fcc84 | 161 | if (!strncmp(commands, "mem=", 4)) { |
1da177e4 LT |
162 | /* |
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 | |
9f2b2a5f | 183 | * also be where SMP things happen. |
1da177e4 LT |
184 | */ |
185 | ||
1da177e4 LT |
186 | extern void sun4c_probe_vac(void); |
187 | extern char cputypval; | |
188 | extern unsigned long start, end; | |
1da177e4 LT |
189 | |
190 | extern unsigned short root_flags; | |
191 | extern unsigned short root_dev; | |
192 | extern unsigned short ram_flags; | |
193 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
194 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
195 | #define RAMDISK_LOAD_FLAG 0x4000 | |
196 | ||
197 | extern int root_mountflags; | |
198 | ||
199 | char reboot_command[COMMAND_LINE_SIZE]; | |
200 | enum sparc_cpu sparc_cpu_model; | |
201 | ||
202 | struct tt_entry *sparc_ttable; | |
203 | ||
204 | struct pt_regs fake_swapper_regs; | |
205 | ||
1da177e4 LT |
206 | void __init setup_arch(char **cmdline_p) |
207 | { | |
208 | int i; | |
209 | unsigned long highest_paddr; | |
210 | ||
211 | sparc_ttable = (struct tt_entry *) &start; | |
212 | ||
213 | /* Initialize PROM console and command line. */ | |
214 | *cmdline_p = prom_getbootargs(); | |
08e7ca11 | 215 | strcpy(boot_command_line, *cmdline_p); |
3fbe36d8 | 216 | parse_early_param(); |
1da177e4 LT |
217 | |
218 | /* Set sparc_cpu_model */ | |
219 | sparc_cpu_model = sun_unknown; | |
365b50f0 DM |
220 | if (!strcmp(&cputypval,"sun4 ")) |
221 | sparc_cpu_model = sun4; | |
222 | if (!strcmp(&cputypval,"sun4c")) | |
223 | sparc_cpu_model = sun4c; | |
224 | if (!strcmp(&cputypval,"sun4m")) | |
225 | sparc_cpu_model = sun4m; | |
226 | if (!strcmp(&cputypval,"sun4s")) | |
227 | sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */ | |
228 | if (!strcmp(&cputypval,"sun4d")) | |
229 | sparc_cpu_model = sun4d; | |
230 | if (!strcmp(&cputypval,"sun4e")) | |
231 | sparc_cpu_model = sun4e; | |
232 | if (!strcmp(&cputypval,"sun4u")) | |
233 | sparc_cpu_model = sun4u; | |
1da177e4 | 234 | |
1da177e4 LT |
235 | printk("ARCH: "); |
236 | switch(sparc_cpu_model) { | |
237 | case sun4: | |
238 | printk("SUN4\n"); | |
239 | break; | |
240 | case sun4c: | |
241 | printk("SUN4C\n"); | |
242 | break; | |
243 | case sun4m: | |
244 | printk("SUN4M\n"); | |
245 | break; | |
246 | case sun4d: | |
247 | printk("SUN4D\n"); | |
248 | break; | |
249 | case sun4e: | |
250 | printk("SUN4E\n"); | |
251 | break; | |
252 | case sun4u: | |
253 | printk("SUN4U\n"); | |
254 | break; | |
255 | default: | |
256 | printk("UNKNOWN!\n"); | |
257 | break; | |
258 | }; | |
259 | ||
260 | #ifdef CONFIG_DUMMY_CONSOLE | |
261 | conswitchp = &dummy_con; | |
262 | #elif defined(CONFIG_PROM_CONSOLE) | |
263 | conswitchp = &prom_con; | |
264 | #endif | |
265 | boot_flags_init(*cmdline_p); | |
266 | ||
267 | idprom_init(); | |
5110bd21 | 268 | if (ARCH_SUN4C) |
1da177e4 LT |
269 | sun4c_probe_vac(); |
270 | load_mmu(); | |
1da177e4 LT |
271 | |
272 | phys_base = 0xffffffffUL; | |
273 | highest_paddr = 0UL; | |
274 | for (i = 0; sp_banks[i].num_bytes != 0; i++) { | |
275 | unsigned long top; | |
276 | ||
277 | if (sp_banks[i].base_addr < phys_base) | |
278 | phys_base = sp_banks[i].base_addr; | |
279 | top = sp_banks[i].base_addr + | |
280 | sp_banks[i].num_bytes; | |
281 | if (highest_paddr < top) | |
282 | highest_paddr = top; | |
283 | } | |
284 | pfn_base = phys_base >> PAGE_SHIFT; | |
285 | ||
286 | if (!root_flags) | |
287 | root_mountflags &= ~MS_RDONLY; | |
288 | ROOT_DEV = old_decode_dev(root_dev); | |
5d2170ad | 289 | #ifdef CONFIG_BLK_DEV_RAM |
1da177e4 LT |
290 | rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; |
291 | rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0); | |
292 | rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0); | |
293 | #endif | |
294 | ||
295 | prom_setsync(prom_sync_me); | |
296 | ||
297 | if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && | |
298 | ((*(short *)linux_dbvec) != -1)) { | |
299 | printk("Booted under KADB. Syncing trap table.\n"); | |
300 | (*(linux_dbvec->teach_debugger))(); | |
301 | } | |
302 | ||
303 | init_mm.context = (unsigned long) NO_CONTEXT; | |
304 | init_task.thread.kregs = &fake_swapper_regs; | |
305 | ||
306 | paging_init(); | |
a23b423e KH |
307 | |
308 | smp_setup_cpu_possible_map(); | |
1da177e4 LT |
309 | } |
310 | ||
1da177e4 LT |
311 | extern char *sparc_cpu_type; |
312 | extern char *sparc_fpu_type; | |
313 | ||
a8cbdcea BB |
314 | static int ncpus_probed; |
315 | ||
1da177e4 LT |
316 | static int show_cpuinfo(struct seq_file *m, void *__unused) |
317 | { | |
318 | seq_printf(m, | |
319 | "cpu\t\t: %s\n" | |
320 | "fpu\t\t: %s\n" | |
321 | "promlib\t\t: Version %d Revision %d\n" | |
322 | "prom\t\t: %d.%d\n" | |
323 | "type\t\t: %s\n" | |
324 | "ncpus probed\t: %d\n" | |
325 | "ncpus active\t: %d\n" | |
326 | #ifndef CONFIG_SMP | |
327 | "CPU0Bogo\t: %lu.%02lu\n" | |
328 | "CPU0ClkTck\t: %ld\n" | |
329 | #endif | |
330 | , | |
6c6bd8b6 SR |
331 | sparc_cpu_type, |
332 | sparc_fpu_type , | |
1da177e4 LT |
333 | romvec->pv_romvers, |
334 | prom_rev, | |
335 | romvec->pv_printrev >> 16, | |
336 | romvec->pv_printrev & 0xffff, | |
337 | &cputypval, | |
a8cbdcea | 338 | ncpus_probed, |
1da177e4 LT |
339 | num_online_cpus() |
340 | #ifndef CONFIG_SMP | |
341 | , cpu_data(0).udelay_val/(500000/HZ), | |
342 | (cpu_data(0).udelay_val/(5000/HZ)) % 100, | |
343 | cpu_data(0).clock_tick | |
344 | #endif | |
345 | ); | |
346 | ||
347 | #ifdef CONFIG_SMP | |
348 | smp_bogo(m); | |
349 | #endif | |
350 | mmu_info(m); | |
351 | #ifdef CONFIG_SMP | |
352 | smp_info(m); | |
353 | #endif | |
354 | return 0; | |
355 | } | |
356 | ||
357 | static void *c_start(struct seq_file *m, loff_t *pos) | |
358 | { | |
359 | /* The pointer we are returning is arbitrary, | |
360 | * it just has to be non-NULL and not IS_ERR | |
361 | * in the success case. | |
362 | */ | |
363 | return *pos == 0 ? &c_start : NULL; | |
364 | } | |
365 | ||
366 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
367 | { | |
368 | ++*pos; | |
369 | return c_start(m, pos); | |
370 | } | |
371 | ||
372 | static void c_stop(struct seq_file *m, void *v) | |
373 | { | |
374 | } | |
375 | ||
872e2be7 | 376 | const struct seq_operations cpuinfo_op = { |
1da177e4 LT |
377 | .start =c_start, |
378 | .next = c_next, | |
379 | .stop = c_stop, | |
380 | .show = show_cpuinfo, | |
381 | }; | |
382 | ||
383 | extern int stop_a_enabled; | |
384 | ||
385 | void sun_do_break(void) | |
386 | { | |
387 | if (!stop_a_enabled) | |
388 | return; | |
389 | ||
390 | printk("\n"); | |
391 | flush_user_windows(); | |
392 | ||
393 | prom_cmdline(); | |
394 | } | |
395 | ||
1da177e4 | 396 | int stop_a_enabled = 1; |
a8cbdcea BB |
397 | |
398 | static int __init topology_init(void) | |
399 | { | |
400 | int i, ncpus, err; | |
401 | ||
402 | /* Count the number of physically present processors in | |
403 | * the machine, even on uniprocessor, so that /proc/cpuinfo | |
404 | * output is consistent with 2.4.x | |
405 | */ | |
406 | ncpus = 0; | |
407 | while (!cpu_find_by_instance(ncpus, NULL, NULL)) | |
408 | ncpus++; | |
409 | ncpus_probed = ncpus; | |
410 | ||
411 | err = 0; | |
412 | for_each_online_cpu(i) { | |
413 | struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); | |
414 | if (!p) | |
415 | err = -ENOMEM; | |
416 | else | |
94583779 | 417 | register_cpu(p, i); |
a8cbdcea BB |
418 | } |
419 | ||
420 | return err; | |
421 | } | |
422 | ||
423 | subsys_initcall(topology_init); |