Input: pcspkr - separate device and driver registration
[linux-2.6.git] / arch / powerpc / kernel / setup-common.c
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/platform_device.h>
22 #include <linux/ide.h>
23 #include <linux/seq_file.h>
24 #include <linux/ioport.h>
25 #include <linux/console.h>
26 #include <linux/utsname.h>
27 #include <linux/tty.h>
28 #include <linux/root_dev.h>
29 #include <linux/notifier.h>
30 #include <linux/cpu.h>
31 #include <linux/unistd.h>
32 #include <linux/serial.h>
33 #include <linux/serial_8250.h>
34 #include <asm/io.h>
35 #include <asm/prom.h>
36 #include <asm/processor.h>
37 #include <asm/vdso_datapage.h>
38 #include <asm/pgtable.h>
39 #include <asm/smp.h>
40 #include <asm/elf.h>
41 #include <asm/machdep.h>
42 #include <asm/time.h>
43 #include <asm/cputable.h>
44 #include <asm/sections.h>
45 #include <asm/btext.h>
46 #include <asm/nvram.h>
47 #include <asm/setup.h>
48 #include <asm/system.h>
49 #include <asm/rtas.h>
50 #include <asm/iommu.h>
51 #include <asm/serial.h>
52 #include <asm/cache.h>
53 #include <asm/page.h>
54 #include <asm/mmu.h>
55 #include <asm/lmb.h>
56 #include <asm/xmon.h>
57
58 #include "setup.h"
59
60 #undef DEBUG
61
62 #ifdef DEBUG
63 #include <asm/udbg.h>
64 #define DBG(fmt...) udbg_printf(fmt)
65 #else
66 #define DBG(fmt...)
67 #endif
68
69 #ifdef CONFIG_PPC_MULTIPLATFORM
70 int _machine = 0;
71 EXPORT_SYMBOL(_machine);
72 #endif
73
74 unsigned long klimit = (unsigned long) _end;
75
76 /*
77  * This still seems to be needed... -- paulus
78  */ 
79 struct screen_info screen_info = {
80         .orig_x = 0,
81         .orig_y = 25,
82         .orig_video_cols = 80,
83         .orig_video_lines = 25,
84         .orig_video_isVGA = 1,
85         .orig_video_points = 16
86 };
87
88 #ifdef __DO_IRQ_CANON
89 /* XXX should go elsewhere eventually */
90 int ppc_do_canonicalize_irqs;
91 EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
92 #endif
93
94 /* also used by kexec */
95 void machine_shutdown(void)
96 {
97         if (ppc_md.machine_shutdown)
98                 ppc_md.machine_shutdown();
99 }
100
101 void machine_restart(char *cmd)
102 {
103         machine_shutdown();
104         if (ppc_md.restart)
105                 ppc_md.restart(cmd);
106 #ifdef CONFIG_SMP
107         smp_send_stop();
108 #endif
109         printk(KERN_EMERG "System Halted, OK to turn off power\n");
110         local_irq_disable();
111         while (1) ;
112 }
113
114 void machine_power_off(void)
115 {
116         machine_shutdown();
117         if (ppc_md.power_off)
118                 ppc_md.power_off();
119 #ifdef CONFIG_SMP
120         smp_send_stop();
121 #endif
122         printk(KERN_EMERG "System Halted, OK to turn off power\n");
123         local_irq_disable();
124         while (1) ;
125 }
126 /* Used by the G5 thermal driver */
127 EXPORT_SYMBOL_GPL(machine_power_off);
128
129 void (*pm_power_off)(void) = machine_power_off;
130 EXPORT_SYMBOL_GPL(pm_power_off);
131
132 void machine_halt(void)
133 {
134         machine_shutdown();
135         if (ppc_md.halt)
136                 ppc_md.halt();
137 #ifdef CONFIG_SMP
138         smp_send_stop();
139 #endif
140         printk(KERN_EMERG "System Halted, OK to turn off power\n");
141         local_irq_disable();
142         while (1) ;
143 }
144
145
146 #ifdef CONFIG_TAU
147 extern u32 cpu_temp(unsigned long cpu);
148 extern u32 cpu_temp_both(unsigned long cpu);
149 #endif /* CONFIG_TAU */
150
151 #ifdef CONFIG_SMP
152 DEFINE_PER_CPU(unsigned int, pvr);
153 #endif
154
155 static int show_cpuinfo(struct seq_file *m, void *v)
156 {
157         unsigned long cpu_id = (unsigned long)v - 1;
158         unsigned int pvr;
159         unsigned short maj;
160         unsigned short min;
161
162         if (cpu_id == NR_CPUS) {
163 #if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
164                 unsigned long bogosum = 0;
165                 int i;
166                 for (i = 0; i < NR_CPUS; ++i)
167                         if (cpu_online(i))
168                                 bogosum += loops_per_jiffy;
169                 seq_printf(m, "total bogomips\t: %lu.%02lu\n",
170                            bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
171 #endif /* CONFIG_SMP && CONFIG_PPC32 */
172                 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
173
174                 if (ppc_md.show_cpuinfo != NULL)
175                         ppc_md.show_cpuinfo(m);
176
177                 return 0;
178         }
179
180         /* We only show online cpus: disable preempt (overzealous, I
181          * knew) to prevent cpu going down. */
182         preempt_disable();
183         if (!cpu_online(cpu_id)) {
184                 preempt_enable();
185                 return 0;
186         }
187
188 #ifdef CONFIG_SMP
189         pvr = per_cpu(pvr, cpu_id);
190 #else
191         pvr = mfspr(SPRN_PVR);
192 #endif
193         maj = (pvr >> 8) & 0xFF;
194         min = pvr & 0xFF;
195
196         seq_printf(m, "processor\t: %lu\n", cpu_id);
197         seq_printf(m, "cpu\t\t: ");
198
199         if (cur_cpu_spec->pvr_mask)
200                 seq_printf(m, "%s", cur_cpu_spec->cpu_name);
201         else
202                 seq_printf(m, "unknown (%08x)", pvr);
203
204 #ifdef CONFIG_ALTIVEC
205         if (cpu_has_feature(CPU_FTR_ALTIVEC))
206                 seq_printf(m, ", altivec supported");
207 #endif /* CONFIG_ALTIVEC */
208
209         seq_printf(m, "\n");
210
211 #ifdef CONFIG_TAU
212         if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
213 #ifdef CONFIG_TAU_AVERAGE
214                 /* more straightforward, but potentially misleading */
215                 seq_printf(m,  "temperature \t: %u C (uncalibrated)\n",
216                            cpu_temp(cpu_id));
217 #else
218                 /* show the actual temp sensor range */
219                 u32 temp;
220                 temp = cpu_temp_both(cpu_id);
221                 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
222                            temp & 0xff, temp >> 16);
223 #endif
224         }
225 #endif /* CONFIG_TAU */
226
227         /*
228          * Assume here that all clock rates are the same in a
229          * smp system.  -- Cort
230          */
231         if (ppc_proc_freq)
232                 seq_printf(m, "clock\t\t: %lu.%06luMHz\n",
233                            ppc_proc_freq / 1000000, ppc_proc_freq % 1000000);
234
235         if (ppc_md.show_percpuinfo != NULL)
236                 ppc_md.show_percpuinfo(m, cpu_id);
237
238         /* If we are a Freescale core do a simple check so
239          * we dont have to keep adding cases in the future */
240         if (PVR_VER(pvr) & 0x8000) {
241                 maj = PVR_MAJ(pvr);
242                 min = PVR_MIN(pvr);
243         } else {
244                 switch (PVR_VER(pvr)) {
245                         case 0x0020:    /* 403 family */
246                                 maj = PVR_MAJ(pvr) + 1;
247                                 min = PVR_MIN(pvr);
248                                 break;
249                         case 0x1008:    /* 740P/750P ?? */
250                                 maj = ((pvr >> 8) & 0xFF) - 1;
251                                 min = pvr & 0xFF;
252                                 break;
253                         default:
254                                 maj = (pvr >> 8) & 0xFF;
255                                 min = pvr & 0xFF;
256                                 break;
257                 }
258         }
259
260         seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
261                    maj, min, PVR_VER(pvr), PVR_REV(pvr));
262
263 #ifdef CONFIG_PPC32
264         seq_printf(m, "bogomips\t: %lu.%02lu\n",
265                    loops_per_jiffy / (500000/HZ),
266                    (loops_per_jiffy / (5000/HZ)) % 100);
267 #endif
268
269 #ifdef CONFIG_SMP
270         seq_printf(m, "\n");
271 #endif
272
273         preempt_enable();
274         return 0;
275 }
276
277 static void *c_start(struct seq_file *m, loff_t *pos)
278 {
279         unsigned long i = *pos;
280
281         return i <= NR_CPUS ? (void *)(i + 1) : NULL;
282 }
283
284 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
285 {
286         ++*pos;
287         return c_start(m, pos);
288 }
289
290 static void c_stop(struct seq_file *m, void *v)
291 {
292 }
293
294 struct seq_operations cpuinfo_op = {
295         .start =c_start,
296         .next = c_next,
297         .stop = c_stop,
298         .show = show_cpuinfo,
299 };
300
301 void __init check_for_initrd(void)
302 {
303 #ifdef CONFIG_BLK_DEV_INITRD
304         unsigned long *prop;
305
306         DBG(" -> check_for_initrd()\n");
307
308         if (of_chosen) {
309                 prop = (unsigned long *)get_property(of_chosen,
310                                 "linux,initrd-start", NULL);
311                 if (prop != NULL) {
312                         initrd_start = (unsigned long)__va(*prop);
313                         prop = (unsigned long *)get_property(of_chosen,
314                                         "linux,initrd-end", NULL);
315                         if (prop != NULL) {
316                                 initrd_end = (unsigned long)__va(*prop);
317                                 initrd_below_start_ok = 1;
318                         } else
319                                 initrd_start = 0;
320                 }
321         }
322
323         /* If we were passed an initrd, set the ROOT_DEV properly if the values
324          * look sensible. If not, clear initrd reference.
325          */
326         if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) &&
327             initrd_end > initrd_start)
328                 ROOT_DEV = Root_RAM0;
329         else
330                 initrd_start = initrd_end = 0;
331
332         if (initrd_start)
333                 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
334
335         DBG(" <- check_for_initrd()\n");
336 #endif /* CONFIG_BLK_DEV_INITRD */
337 }
338
339 #ifdef CONFIG_SMP
340
341 /**
342  * setup_cpu_maps - initialize the following cpu maps:
343  *                  cpu_possible_map
344  *                  cpu_present_map
345  *                  cpu_sibling_map
346  *
347  * Having the possible map set up early allows us to restrict allocations
348  * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
349  *
350  * We do not initialize the online map here; cpus set their own bits in
351  * cpu_online_map as they come up.
352  *
353  * This function is valid only for Open Firmware systems.  finish_device_tree
354  * must be called before using this.
355  *
356  * While we're here, we may as well set the "physical" cpu ids in the paca.
357  */
358 void __init smp_setup_cpu_maps(void)
359 {
360         struct device_node *dn = NULL;
361         int cpu = 0;
362         int swap_cpuid = 0;
363
364         while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
365                 int *intserv;
366                 int j, len = sizeof(u32), nthreads = 1;
367
368                 intserv = (int *)get_property(dn, "ibm,ppc-interrupt-server#s",
369                                               &len);
370                 if (intserv)
371                         nthreads = len / sizeof(int);
372                 else {
373                         intserv = (int *) get_property(dn, "reg", NULL);
374                         if (!intserv)
375                                 intserv = &cpu; /* assume logical == phys */
376                 }
377
378                 for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
379                         cpu_set(cpu, cpu_present_map);
380                         set_hard_smp_processor_id(cpu, intserv[j]);
381
382                         if (intserv[j] == boot_cpuid_phys)
383                                 swap_cpuid = cpu;
384                         cpu_set(cpu, cpu_possible_map);
385                         cpu++;
386                 }
387         }
388
389         /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
390          * boot cpu is logical 0.
391          */
392         if (boot_cpuid_phys != get_hard_smp_processor_id(0)) {
393                 u32 tmp;
394                 tmp = get_hard_smp_processor_id(0);
395                 set_hard_smp_processor_id(0, boot_cpuid_phys);
396                 set_hard_smp_processor_id(swap_cpuid, tmp);
397         }
398
399 #ifdef CONFIG_PPC64
400         /*
401          * On pSeries LPAR, we need to know how many cpus
402          * could possibly be added to this partition.
403          */
404         if (_machine == PLATFORM_PSERIES_LPAR &&
405             (dn = of_find_node_by_path("/rtas"))) {
406                 int num_addr_cell, num_size_cell, maxcpus;
407                 unsigned int *ireg;
408
409                 num_addr_cell = prom_n_addr_cells(dn);
410                 num_size_cell = prom_n_size_cells(dn);
411
412                 ireg = (unsigned int *)
413                         get_property(dn, "ibm,lrdr-capacity", NULL);
414
415                 if (!ireg)
416                         goto out;
417
418                 maxcpus = ireg[num_addr_cell + num_size_cell];
419
420                 /* Double maxcpus for processors which have SMT capability */
421                 if (cpu_has_feature(CPU_FTR_SMT))
422                         maxcpus *= 2;
423
424                 if (maxcpus > NR_CPUS) {
425                         printk(KERN_WARNING
426                                "Partition configured for %d cpus, "
427                                "operating system maximum is %d.\n",
428                                maxcpus, NR_CPUS);
429                         maxcpus = NR_CPUS;
430                 } else
431                         printk(KERN_INFO "Partition configured for %d cpus.\n",
432                                maxcpus);
433
434                 for (cpu = 0; cpu < maxcpus; cpu++)
435                         cpu_set(cpu, cpu_possible_map);
436         out:
437                 of_node_put(dn);
438         }
439
440         /*
441          * Do the sibling map; assume only two threads per processor.
442          */
443         for_each_cpu(cpu) {
444                 cpu_set(cpu, cpu_sibling_map[cpu]);
445                 if (cpu_has_feature(CPU_FTR_SMT))
446                         cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
447         }
448
449         vdso_data->processorCount = num_present_cpus();
450 #endif /* CONFIG_PPC64 */
451 }
452 #endif /* CONFIG_SMP */
453
454 #ifdef CONFIG_XMON
455 static int __init early_xmon(char *p)
456 {
457         /* ensure xmon is enabled */
458         if (p) {
459                 if (strncmp(p, "on", 2) == 0)
460                         xmon_init(1);
461                 if (strncmp(p, "off", 3) == 0)
462                         xmon_init(0);
463                 if (strncmp(p, "early", 5) != 0)
464                         return 0;
465         }
466         xmon_init(1);
467         debugger(NULL);
468
469         return 0;
470 }
471 early_param("xmon", early_xmon);
472 #endif
473
474 static __init int add_pcspkr(void)
475 {
476         struct device_node *np;
477         struct platform_device *pd;
478         int ret;
479
480         np = of_find_compatible_node(NULL, NULL, "pnpPNP,100");
481         of_node_put(np);
482         if (!np)
483                 return -ENODEV;
484
485         pd = platform_device_alloc("pcspkr", -1);
486         if (!pd)
487                 return -ENOMEM;
488
489         ret = platform_device_add(pd);
490         if (ret)
491                 platform_device_put(pd);
492
493         return ret;
494 }
495 device_initcall(add_pcspkr);