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Commit | Line | Data |
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03501dab PM |
1 | /* |
2 | * Common boot and setup code for both 32-bit and 64-bit. | |
3 | * Extracted from arch/powerpc/kernel/setup_64.c. | |
4 | * | |
5 | * Copyright (C) 2001 PPC64 Team, IBM Corp | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
12 | #include <linux/config.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/string.h> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/reboot.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/initrd.h> | |
21 | #include <linux/ide.h> | |
22 | #include <linux/seq_file.h> | |
23 | #include <linux/ioport.h> | |
24 | #include <linux/console.h> | |
25 | #include <linux/utsname.h> | |
26 | #include <linux/tty.h> | |
27 | #include <linux/root_dev.h> | |
28 | #include <linux/notifier.h> | |
29 | #include <linux/cpu.h> | |
30 | #include <linux/unistd.h> | |
31 | #include <linux/serial.h> | |
32 | #include <linux/serial_8250.h> | |
33 | #include <asm/io.h> | |
34 | #include <asm/prom.h> | |
35 | #include <asm/processor.h> | |
36 | #include <asm/pgtable.h> | |
37 | #include <asm/bootinfo.h> | |
38 | #include <asm/smp.h> | |
39 | #include <asm/elf.h> | |
40 | #include <asm/machdep.h> | |
41 | #include <asm/time.h> | |
42 | #include <asm/cputable.h> | |
43 | #include <asm/sections.h> | |
44 | #include <asm/btext.h> | |
45 | #include <asm/nvram.h> | |
46 | #include <asm/setup.h> | |
47 | #include <asm/system.h> | |
48 | #include <asm/rtas.h> | |
49 | #include <asm/iommu.h> | |
50 | #include <asm/serial.h> | |
51 | #include <asm/cache.h> | |
52 | #include <asm/page.h> | |
53 | #include <asm/mmu.h> | |
54 | #include <asm/lmb.h> | |
55 | ||
56 | #undef DEBUG | |
57 | ||
58 | #ifdef DEBUG | |
59 | #define DBG(fmt...) udbg_printf(fmt) | |
60 | #else | |
61 | #define DBG(fmt...) | |
62 | #endif | |
63 | ||
64 | /* | |
65 | * This still seems to be needed... -- paulus | |
66 | */ | |
67 | struct screen_info screen_info = { | |
68 | .orig_x = 0, | |
69 | .orig_y = 25, | |
70 | .orig_video_cols = 80, | |
71 | .orig_video_lines = 25, | |
72 | .orig_video_isVGA = 1, | |
73 | .orig_video_points = 16 | |
74 | }; | |
75 | ||
76 | #ifdef __DO_IRQ_CANON | |
77 | /* XXX should go elsewhere eventually */ | |
78 | int ppc_do_canonicalize_irqs; | |
79 | EXPORT_SYMBOL(ppc_do_canonicalize_irqs); | |
80 | #endif | |
81 | ||
82 | /* also used by kexec */ | |
83 | void machine_shutdown(void) | |
84 | { | |
85 | if (ppc_md.nvram_sync) | |
86 | ppc_md.nvram_sync(); | |
87 | } | |
88 | ||
89 | void machine_restart(char *cmd) | |
90 | { | |
91 | machine_shutdown(); | |
92 | ppc_md.restart(cmd); | |
93 | #ifdef CONFIG_SMP | |
94 | smp_send_stop(); | |
95 | #endif | |
96 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
97 | local_irq_disable(); | |
98 | while (1) ; | |
99 | } | |
100 | ||
101 | void machine_power_off(void) | |
102 | { | |
103 | machine_shutdown(); | |
104 | ppc_md.power_off(); | |
105 | #ifdef CONFIG_SMP | |
106 | smp_send_stop(); | |
107 | #endif | |
108 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
109 | local_irq_disable(); | |
110 | while (1) ; | |
111 | } | |
112 | /* Used by the G5 thermal driver */ | |
113 | EXPORT_SYMBOL_GPL(machine_power_off); | |
114 | ||
115 | void (*pm_power_off)(void) = machine_power_off; | |
116 | EXPORT_SYMBOL_GPL(pm_power_off); | |
117 | ||
118 | void machine_halt(void) | |
119 | { | |
120 | machine_shutdown(); | |
121 | ppc_md.halt(); | |
122 | #ifdef CONFIG_SMP | |
123 | smp_send_stop(); | |
124 | #endif | |
125 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
126 | local_irq_disable(); | |
127 | while (1) ; | |
128 | } | |
129 | ||
130 | ||
131 | #ifdef CONFIG_TAU | |
132 | extern u32 cpu_temp(unsigned long cpu); | |
133 | extern u32 cpu_temp_both(unsigned long cpu); | |
134 | #endif /* CONFIG_TAU */ | |
135 | ||
136 | #ifdef CONFIG_SMP | |
137 | DEFINE_PER_CPU(unsigned int, pvr); | |
138 | #endif | |
139 | ||
140 | static int show_cpuinfo(struct seq_file *m, void *v) | |
141 | { | |
142 | unsigned long cpu_id = (unsigned long)v - 1; | |
143 | unsigned int pvr; | |
144 | unsigned short maj; | |
145 | unsigned short min; | |
146 | ||
147 | if (cpu_id == NR_CPUS) { | |
148 | #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) | |
149 | unsigned long bogosum = 0; | |
150 | int i; | |
151 | for (i = 0; i < NR_CPUS; ++i) | |
152 | if (cpu_online(i)) | |
153 | bogosum += loops_per_jiffy; | |
154 | seq_printf(m, "total bogomips\t: %lu.%02lu\n", | |
155 | bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); | |
156 | #endif /* CONFIG_SMP && CONFIG_PPC32 */ | |
157 | seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); | |
158 | ||
159 | if (ppc_md.show_cpuinfo != NULL) | |
160 | ppc_md.show_cpuinfo(m); | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | /* We only show online cpus: disable preempt (overzealous, I | |
166 | * knew) to prevent cpu going down. */ | |
167 | preempt_disable(); | |
168 | if (!cpu_online(cpu_id)) { | |
169 | preempt_enable(); | |
170 | return 0; | |
171 | } | |
172 | ||
173 | #ifdef CONFIG_SMP | |
174 | #ifdef CONFIG_PPC64 /* XXX for now */ | |
175 | pvr = per_cpu(pvr, cpu_id); | |
176 | #else | |
177 | pvr = cpu_data[cpu_id].pvr; | |
178 | #endif | |
179 | #else | |
180 | pvr = mfspr(SPRN_PVR); | |
181 | #endif | |
182 | maj = (pvr >> 8) & 0xFF; | |
183 | min = pvr & 0xFF; | |
184 | ||
185 | seq_printf(m, "processor\t: %lu\n", cpu_id); | |
186 | seq_printf(m, "cpu\t\t: "); | |
187 | ||
188 | if (cur_cpu_spec->pvr_mask) | |
189 | seq_printf(m, "%s", cur_cpu_spec->cpu_name); | |
190 | else | |
191 | seq_printf(m, "unknown (%08x)", pvr); | |
192 | ||
193 | #ifdef CONFIG_ALTIVEC | |
194 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
195 | seq_printf(m, ", altivec supported"); | |
196 | #endif /* CONFIG_ALTIVEC */ | |
197 | ||
198 | seq_printf(m, "\n"); | |
199 | ||
200 | #ifdef CONFIG_TAU | |
201 | if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { | |
202 | #ifdef CONFIG_TAU_AVERAGE | |
203 | /* more straightforward, but potentially misleading */ | |
204 | seq_printf(m, "temperature \t: %u C (uncalibrated)\n", | |
205 | cpu_temp(i)); | |
206 | #else | |
207 | /* show the actual temp sensor range */ | |
208 | u32 temp; | |
209 | temp = cpu_temp_both(i); | |
210 | seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", | |
211 | temp & 0xff, temp >> 16); | |
212 | #endif | |
213 | } | |
214 | #endif /* CONFIG_TAU */ | |
215 | ||
216 | /* | |
217 | * Assume here that all clock rates are the same in a | |
218 | * smp system. -- Cort | |
219 | */ | |
220 | if (ppc_proc_freq) | |
221 | seq_printf(m, "clock\t\t: %lu.%06luMHz\n", | |
222 | ppc_proc_freq / 1000000, ppc_proc_freq % 1000000); | |
223 | ||
224 | if (ppc_md.show_percpuinfo != NULL) | |
225 | ppc_md.show_percpuinfo(m, cpu_id); | |
226 | ||
227 | /* If we are a Freescale core do a simple check so | |
228 | * we dont have to keep adding cases in the future */ | |
229 | if (PVR_VER(pvr) & 0x8000) { | |
230 | maj = PVR_MAJ(pvr); | |
231 | min = PVR_MIN(pvr); | |
232 | } else { | |
233 | switch (PVR_VER(pvr)) { | |
234 | case 0x0020: /* 403 family */ | |
235 | maj = PVR_MAJ(pvr) + 1; | |
236 | min = PVR_MIN(pvr); | |
237 | break; | |
238 | case 0x1008: /* 740P/750P ?? */ | |
239 | maj = ((pvr >> 8) & 0xFF) - 1; | |
240 | min = pvr & 0xFF; | |
241 | break; | |
242 | default: | |
243 | maj = (pvr >> 8) & 0xFF; | |
244 | min = pvr & 0xFF; | |
245 | break; | |
246 | } | |
247 | } | |
248 | ||
249 | seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", | |
250 | maj, min, PVR_VER(pvr), PVR_REV(pvr)); | |
251 | ||
252 | #ifdef CONFIG_PPC32 | |
253 | seq_printf(m, "bogomips\t: %lu.%02lu\n", | |
254 | loops_per_jiffy / (500000/HZ), | |
255 | (loops_per_jiffy / (5000/HZ)) % 100); | |
256 | #endif | |
257 | ||
258 | #ifdef CONFIG_SMP | |
259 | seq_printf(m, "\n"); | |
260 | #endif | |
261 | ||
262 | preempt_enable(); | |
263 | return 0; | |
264 | } | |
265 | ||
266 | static void *c_start(struct seq_file *m, loff_t *pos) | |
267 | { | |
268 | unsigned long i = *pos; | |
269 | ||
270 | return i <= NR_CPUS ? (void *)(i + 1) : NULL; | |
271 | } | |
272 | ||
273 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
274 | { | |
275 | ++*pos; | |
276 | return c_start(m, pos); | |
277 | } | |
278 | ||
279 | static void c_stop(struct seq_file *m, void *v) | |
280 | { | |
281 | } | |
282 | ||
283 | struct seq_operations cpuinfo_op = { | |
284 | .start =c_start, | |
285 | .next = c_next, | |
286 | .stop = c_stop, | |
287 | .show = show_cpuinfo, | |
288 | }; | |
289 | ||
290 | #ifdef CONFIG_PPC_MULTIPLATFORM | |
291 | static int __init set_preferred_console(void) | |
292 | { | |
293 | struct device_node *prom_stdout = NULL; | |
294 | char *name; | |
295 | u32 *spd; | |
296 | int offset = 0; | |
297 | ||
298 | DBG(" -> set_preferred_console()\n"); | |
299 | ||
300 | /* The user has requested a console so this is already set up. */ | |
301 | if (strstr(saved_command_line, "console=")) { | |
302 | DBG(" console was specified !\n"); | |
303 | return -EBUSY; | |
304 | } | |
305 | ||
306 | if (!of_chosen) { | |
307 | DBG(" of_chosen is NULL !\n"); | |
308 | return -ENODEV; | |
309 | } | |
310 | /* We are getting a weird phandle from OF ... */ | |
311 | /* ... So use the full path instead */ | |
312 | name = (char *)get_property(of_chosen, "linux,stdout-path", NULL); | |
313 | if (name == NULL) { | |
314 | DBG(" no linux,stdout-path !\n"); | |
315 | return -ENODEV; | |
316 | } | |
317 | prom_stdout = of_find_node_by_path(name); | |
318 | if (!prom_stdout) { | |
319 | DBG(" can't find stdout package %s !\n", name); | |
320 | return -ENODEV; | |
321 | } | |
322 | DBG("stdout is %s\n", prom_stdout->full_name); | |
323 | ||
324 | name = (char *)get_property(prom_stdout, "name", NULL); | |
325 | if (!name) { | |
326 | DBG(" stdout package has no name !\n"); | |
327 | goto not_found; | |
328 | } | |
329 | spd = (u32 *)get_property(prom_stdout, "current-speed", NULL); | |
330 | ||
331 | if (0) | |
332 | ; | |
333 | #ifdef CONFIG_SERIAL_8250_CONSOLE | |
334 | else if (strcmp(name, "serial") == 0) { | |
335 | int i; | |
336 | u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i); | |
337 | if (i > 8) { | |
338 | switch (reg[1]) { | |
339 | case 0x3f8: | |
340 | offset = 0; | |
341 | break; | |
342 | case 0x2f8: | |
343 | offset = 1; | |
344 | break; | |
345 | case 0x898: | |
346 | offset = 2; | |
347 | break; | |
348 | case 0x890: | |
349 | offset = 3; | |
350 | break; | |
351 | default: | |
352 | /* We dont recognise the serial port */ | |
353 | goto not_found; | |
354 | } | |
355 | } | |
356 | } | |
357 | #endif /* CONFIG_SERIAL_8250_CONSOLE */ | |
358 | #ifdef CONFIG_PPC_PSERIES | |
359 | else if (strcmp(name, "vty") == 0) { | |
360 | u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL); | |
361 | char *compat = (char *)get_property(prom_stdout, "compatible", NULL); | |
362 | ||
363 | if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) { | |
364 | /* Host Virtual Serial Interface */ | |
365 | int offset; | |
366 | switch (reg[0]) { | |
367 | case 0x30000000: | |
368 | offset = 0; | |
369 | break; | |
370 | case 0x30000001: | |
371 | offset = 1; | |
372 | break; | |
373 | default: | |
374 | goto not_found; | |
375 | } | |
376 | of_node_put(prom_stdout); | |
377 | DBG("Found hvsi console at offset %d\n", offset); | |
378 | return add_preferred_console("hvsi", offset, NULL); | |
379 | } else { | |
380 | /* pSeries LPAR virtual console */ | |
381 | of_node_put(prom_stdout); | |
382 | DBG("Found hvc console\n"); | |
383 | return add_preferred_console("hvc", 0, NULL); | |
384 | } | |
385 | } | |
386 | #endif /* CONFIG_PPC_PSERIES */ | |
387 | #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE | |
388 | else if (strcmp(name, "ch-a") == 0) | |
389 | offset = 0; | |
390 | else if (strcmp(name, "ch-b") == 0) | |
391 | offset = 1; | |
392 | #endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ | |
393 | else | |
394 | goto not_found; | |
395 | of_node_put(prom_stdout); | |
396 | ||
397 | DBG("Found serial console at ttyS%d\n", offset); | |
398 | ||
399 | if (spd) { | |
400 | static char __initdata opt[16]; | |
401 | sprintf(opt, "%d", *spd); | |
402 | return add_preferred_console("ttyS", offset, opt); | |
403 | } else | |
404 | return add_preferred_console("ttyS", offset, NULL); | |
405 | ||
406 | not_found: | |
407 | DBG("No preferred console found !\n"); | |
408 | of_node_put(prom_stdout); | |
409 | return -ENODEV; | |
410 | } | |
411 | console_initcall(set_preferred_console); | |
412 | #endif /* CONFIG_PPC_MULTIPLATFORM */ |