powerpc: Get 64-bit configs to compile with ARCH=powerpc
[linux-2.6.git] / arch / ppc64 / kernel / pmac_setup.c
1 /*
2  *  arch/ppc/platforms/setup.c
3  *
4  *  PowerPC version
5  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
6  *
7  *  Adapted for Power Macintosh by Paul Mackerras
8  *    Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
9  *
10  *  Derived from "arch/alpha/kernel/setup.c"
11  *    Copyright (C) 1995 Linus Torvalds
12  *
13  *  Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
14  *
15  *  This program is free software; you can redistribute it and/or
16  *  modify it under the terms of the GNU General Public License
17  *  as published by the Free Software Foundation; either version
18  *  2 of the License, or (at your option) any later version.
19  *
20  */
21
22 /*
23  * bootup setup stuff..
24  */
25
26 #undef DEBUG
27
28 #include <linux/config.h>
29 #include <linux/init.h>
30 #include <linux/errno.h>
31 #include <linux/sched.h>
32 #include <linux/kernel.h>
33 #include <linux/mm.h>
34 #include <linux/stddef.h>
35 #include <linux/unistd.h>
36 #include <linux/ptrace.h>
37 #include <linux/slab.h>
38 #include <linux/user.h>
39 #include <linux/a.out.h>
40 #include <linux/tty.h>
41 #include <linux/string.h>
42 #include <linux/delay.h>
43 #include <linux/ioport.h>
44 #include <linux/major.h>
45 #include <linux/initrd.h>
46 #include <linux/vt_kern.h>
47 #include <linux/console.h>
48 #include <linux/ide.h>
49 #include <linux/pci.h>
50 #include <linux/adb.h>
51 #include <linux/cuda.h>
52 #include <linux/pmu.h>
53 #include <linux/irq.h>
54 #include <linux/seq_file.h>
55 #include <linux/root_dev.h>
56 #include <linux/bitops.h>
57
58 #include <asm/processor.h>
59 #include <asm/sections.h>
60 #include <asm/prom.h>
61 #include <asm/system.h>
62 #include <asm/io.h>
63 #include <asm/pci-bridge.h>
64 #include <asm/iommu.h>
65 #include <asm/machdep.h>
66 #include <asm/dma.h>
67 #include <asm/btext.h>
68 #include <asm/cputable.h>
69 #include <asm/pmac_feature.h>
70 #include <asm/time.h>
71 #include <asm/of_device.h>
72 #include <asm/lmb.h>
73 #include <asm/smu.h>
74 #include <asm/pmc.h>
75 #include <asm/mpic.h>
76 #include <asm/udbg.h>
77
78 #include "pmac.h"
79
80 #ifdef DEBUG
81 #define DBG(fmt...) udbg_printf(fmt)
82 #else
83 #define DBG(fmt...)
84 #endif
85
86 static int current_root_goodness = -1;
87 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
88
89 extern  int powersave_nap;
90 int sccdbg;
91
92 sys_ctrler_t sys_ctrler;
93 EXPORT_SYMBOL(sys_ctrler);
94
95 #ifdef CONFIG_PMAC_SMU
96 unsigned long smu_cmdbuf_abs;
97 EXPORT_SYMBOL(smu_cmdbuf_abs);
98 #endif
99
100 extern void udbg_init_scc(struct device_node *np);
101
102 static void pmac_show_cpuinfo(struct seq_file *m)
103 {
104         struct device_node *np;
105         char *pp;
106         int plen;
107         char* mbname;
108         int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
109                                         PMAC_MB_INFO_MODEL, 0);
110         unsigned int mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
111                                                  PMAC_MB_INFO_FLAGS, 0);
112
113         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
114                               (long)&mbname) != 0)
115                 mbname = "Unknown";
116         
117         /* find motherboard type */
118         seq_printf(m, "machine\t\t: ");
119         np = find_devices("device-tree");
120         if (np != NULL) {
121                 pp = (char *) get_property(np, "model", NULL);
122                 if (pp != NULL)
123                         seq_printf(m, "%s\n", pp);
124                 else
125                         seq_printf(m, "PowerMac\n");
126                 pp = (char *) get_property(np, "compatible", &plen);
127                 if (pp != NULL) {
128                         seq_printf(m, "motherboard\t:");
129                         while (plen > 0) {
130                                 int l = strlen(pp) + 1;
131                                 seq_printf(m, " %s", pp);
132                                 plen -= l;
133                                 pp += l;
134                         }
135                         seq_printf(m, "\n");
136                 }
137         } else
138                 seq_printf(m, "PowerMac\n");
139
140         /* print parsed model */
141         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
142         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
143
144         /* Indicate newworld */
145         seq_printf(m, "pmac-generation\t: NewWorld\n");
146 }
147
148
149 static void __init pmac_setup_arch(void)
150 {
151         /* init to some ~sane value until calibrate_delay() runs */
152         loops_per_jiffy = 50000000;
153
154         /* Probe motherboard chipset */
155         pmac_feature_init();
156 #if 0
157         /* Lock-enable the SCC channel used for debug */
158         if (sccdbg) {
159                 np = of_find_node_by_name(NULL, "escc");
160                 if (np)
161                         pmac_call_feature(PMAC_FTR_SCC_ENABLE, np,
162                                           PMAC_SCC_ASYNC | PMAC_SCC_FLAG_XMON, 1);
163         }
164 #endif
165         /* We can NAP */
166         powersave_nap = 1;
167
168 #ifdef CONFIG_ADB_PMU
169         /* Initialize the PMU if any */
170         find_via_pmu();
171 #endif
172 #ifdef CONFIG_PMAC_SMU
173         /* Initialize the SMU if any */
174         smu_init();
175 #endif
176
177         /* Init NVRAM access */
178         pmac_nvram_init();
179
180         /* Setup SMP callback */
181 #ifdef CONFIG_SMP
182         pmac_setup_smp();
183 #endif
184
185         /* Lookup PCI hosts */
186         pmac_pci_init();
187
188 #ifdef CONFIG_DUMMY_CONSOLE
189         conswitchp = &dummy_con;
190 #endif
191
192         printk(KERN_INFO "Using native/NAP idle loop\n");
193 }
194
195 #ifdef CONFIG_SCSI
196 void note_scsi_host(struct device_node *node, void *host)
197 {
198         /* Obsolete */
199 }
200 #endif
201
202
203 static int initializing = 1;
204
205 static int pmac_late_init(void)
206 {
207         initializing = 0;
208         return 0;
209 }
210
211 late_initcall(pmac_late_init);
212
213 /* can't be __init - can be called whenever a disk is first accessed */
214 void note_bootable_part(dev_t dev, int part, int goodness)
215 {
216         extern dev_t boot_dev;
217         char *p;
218
219         if (!initializing)
220                 return;
221         if ((goodness <= current_root_goodness) &&
222             ROOT_DEV != DEFAULT_ROOT_DEVICE)
223                 return;
224         p = strstr(saved_command_line, "root=");
225         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
226                 return;
227
228         if (!boot_dev || dev == boot_dev) {
229                 ROOT_DEV = dev + part;
230                 boot_dev = 0;
231                 current_root_goodness = goodness;
232         }
233 }
234
235 static void pmac_restart(char *cmd)
236 {
237         switch(sys_ctrler) {
238 #ifdef CONFIG_ADB_PMU
239         case SYS_CTRLER_PMU:
240                 pmu_restart();
241                 break;
242 #endif
243
244 #ifdef CONFIG_PMAC_SMU
245         case SYS_CTRLER_SMU:
246                 smu_restart();
247                 break;
248 #endif
249         default:
250                 ;
251         }
252 }
253
254 static void pmac_power_off(void)
255 {
256         switch(sys_ctrler) {
257 #ifdef CONFIG_ADB_PMU
258         case SYS_CTRLER_PMU:
259                 pmu_shutdown();
260                 break;
261 #endif
262 #ifdef CONFIG_PMAC_SMU
263         case SYS_CTRLER_SMU:
264                 smu_shutdown();
265                 break;
266 #endif
267         default:
268                 ;
269         }
270 }
271
272 static void pmac_halt(void)
273 {
274         pmac_power_off();
275 }
276
277 #ifdef CONFIG_BOOTX_TEXT
278 static void btext_putc(unsigned char c)
279 {
280         btext_drawchar(c);
281 }
282
283 static void __init init_boot_display(void)
284 {
285         char *name;
286         struct device_node *np = NULL; 
287         int rc = -ENODEV;
288
289         printk("trying to initialize btext ...\n");
290
291         name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
292         if (name != NULL) {
293                 np = of_find_node_by_path(name);
294                 if (np != NULL) {
295                         if (strcmp(np->type, "display") != 0) {
296                                 printk("boot stdout isn't a display !\n");
297                                 of_node_put(np);
298                                 np = NULL;
299                         }
300                 }
301         }
302         if (np)
303                 rc = btext_initialize(np);
304         if (rc == 0)
305                 return;
306
307         for (np = NULL; (np = of_find_node_by_type(np, "display"));) {
308                 if (get_property(np, "linux,opened", NULL)) {
309                         printk("trying %s ...\n", np->full_name);
310                         rc = btext_initialize(np);
311                         printk("result: %d\n", rc);
312                 }
313                 if (rc == 0)
314                         return;
315         }
316 }
317 #endif /* CONFIG_BOOTX_TEXT */
318
319 /* 
320  * Early initialization.
321  */
322 static void __init pmac_init_early(void)
323 {
324         DBG(" -> pmac_init_early\n");
325
326         /* Initialize hash table, from now on, we can take hash faults
327          * and call ioremap
328          */
329         hpte_init_native();
330
331         /* Init SCC */
332         if (strstr(cmd_line, "sccdbg")) {
333                 sccdbg = 1;
334                 udbg_init_scc(NULL);
335         }
336 #ifdef CONFIG_BOOTX_TEXT
337         else {
338                 init_boot_display();
339
340                 udbg_putc = btext_putc;
341         }
342 #endif /* CONFIG_BOOTX_TEXT */
343
344         /* Setup interrupt mapping options */
345         ppc64_interrupt_controller = IC_OPEN_PIC;
346
347         iommu_init_early_u3();
348
349         DBG(" <- pmac_init_early\n");
350 }
351
352 static int pmac_u3_cascade(struct pt_regs *regs, void *data)
353 {
354         return mpic_get_one_irq((struct mpic *)data, regs);
355 }
356
357 static __init void pmac_init_IRQ(void)
358 {
359         struct device_node *irqctrler  = NULL;
360         struct device_node *irqctrler2 = NULL;
361         struct device_node *np = NULL;
362         struct mpic *mpic1, *mpic2;
363
364         /* We first try to detect Apple's new Core99 chipset, since mac-io
365          * is quite different on those machines and contains an IBM MPIC2.
366          */
367         while ((np = of_find_node_by_type(np, "open-pic")) != NULL) {
368                 struct device_node *parent = of_get_parent(np);
369                 if (parent && !strcmp(parent->name, "u3"))
370                         irqctrler2 = of_node_get(np);
371                 else
372                         irqctrler = of_node_get(np);
373                 of_node_put(parent);
374         }
375         if (irqctrler != NULL && irqctrler->n_addrs > 0) {
376                 unsigned char senses[128];
377
378                 printk(KERN_INFO "PowerMac using OpenPIC irq controller at 0x%08x\n",
379                        (unsigned int)irqctrler->addrs[0].address);
380
381                 prom_get_irq_senses(senses, 0, 128);
382                 mpic1 = mpic_alloc(irqctrler->addrs[0].address,
383                                    MPIC_PRIMARY | MPIC_WANTS_RESET,
384                                    0, 0, 128, 256, senses, 128, " K2-MPIC  ");
385                 BUG_ON(mpic1 == NULL);
386                 mpic_init(mpic1);               
387
388                 if (irqctrler2 != NULL && irqctrler2->n_intrs > 0 &&
389                     irqctrler2->n_addrs > 0) {
390                         printk(KERN_INFO "Slave OpenPIC at 0x%08x hooked on IRQ %d\n",
391                                (u32)irqctrler2->addrs[0].address,
392                                irqctrler2->intrs[0].line);
393
394                         pmac_call_feature(PMAC_FTR_ENABLE_MPIC, irqctrler2, 0, 0);
395                         prom_get_irq_senses(senses, 128, 128 + 128);
396
397                         /* We don't need to set MPIC_BROKEN_U3 here since we don't have
398                          * hypertransport interrupts routed to it
399                          */
400                         mpic2 = mpic_alloc(irqctrler2->addrs[0].address,
401                                            MPIC_BIG_ENDIAN | MPIC_WANTS_RESET,
402                                            0, 128, 128, 0, senses, 128, " U3-MPIC  ");
403                         BUG_ON(mpic2 == NULL);
404                         mpic_init(mpic2);
405                         mpic_setup_cascade(irqctrler2->intrs[0].line,
406                                            pmac_u3_cascade, mpic2);
407                 }
408         }
409         of_node_put(irqctrler);
410         of_node_put(irqctrler2);
411 }
412
413 static void __init pmac_progress(char *s, unsigned short hex)
414 {
415         if (sccdbg) {
416                 udbg_puts(s);
417                 udbg_puts("\n");
418         }
419 #ifdef CONFIG_BOOTX_TEXT
420         else if (boot_text_mapped) {
421                 btext_drawstring(s);
422                 btext_drawstring("\n");
423         }
424 #endif /* CONFIG_BOOTX_TEXT */
425 }
426
427 /*
428  * pmac has no legacy IO, anything calling this function has to
429  * fail or bad things will happen
430  */
431 static int pmac_check_legacy_ioport(unsigned int baseport)
432 {
433         return -ENODEV;
434 }
435
436 static int __init pmac_declare_of_platform_devices(void)
437 {
438         struct device_node *np, *npp;
439
440         npp = of_find_node_by_name(NULL, "u3");
441         if (npp) {
442                 for (np = NULL; (np = of_get_next_child(npp, np)) != NULL;) {
443                         if (strncmp(np->name, "i2c", 3) == 0) {
444                                 of_platform_device_create(np, "u3-i2c", NULL);
445                                 of_node_put(np);
446                                 break;
447                         }
448                 }
449                 of_node_put(npp);
450         }
451         npp = of_find_node_by_type(NULL, "smu");
452         if (npp) {
453                 of_platform_device_create(npp, "smu", NULL);
454                 of_node_put(npp);
455         }
456
457         return 0;
458 }
459
460 device_initcall(pmac_declare_of_platform_devices);
461
462 /*
463  * Called very early, MMU is off, device-tree isn't unflattened
464  */
465 static int __init pmac_probe(int platform)
466 {
467         if (platform != PLATFORM_POWERMAC)
468                 return 0;
469         /*
470          * On U3, the DART (iommu) must be allocated now since it
471          * has an impact on htab_initialize (due to the large page it
472          * occupies having to be broken up so the DART itself is not
473          * part of the cacheable linar mapping
474          */
475         alloc_u3_dart_table();
476
477 #ifdef CONFIG_PMAC_SMU
478         /*
479          * SMU based G5s need some memory below 2Gb, at least the current
480          * driver needs that. We have to allocate it now. We allocate 4k
481          * (1 small page) for now.
482          */
483         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
484 #endif /* CONFIG_PMAC_SMU */
485
486         return 1;
487 }
488
489 static int pmac_probe_mode(struct pci_bus *bus)
490 {
491         struct device_node *node = bus->sysdata;
492
493         /* We need to use normal PCI probing for the AGP bus,
494            since the device for the AGP bridge isn't in the tree. */
495         if (bus->self == NULL && device_is_compatible(node, "u3-agp"))
496                 return PCI_PROBE_NORMAL;
497
498         return PCI_PROBE_DEVTREE;
499 }
500
501 struct machdep_calls __initdata pmac_md = {
502 #ifdef CONFIG_HOTPLUG_CPU
503         .cpu_die                = generic_mach_cpu_die,
504 #endif
505         .probe                  = pmac_probe,
506         .setup_arch             = pmac_setup_arch,
507         .init_early             = pmac_init_early,
508         .get_cpuinfo            = pmac_show_cpuinfo,
509         .init_IRQ               = pmac_init_IRQ,
510         .get_irq                = mpic_get_irq,
511         .pcibios_fixup          = pmac_pcibios_fixup,
512         .pci_probe_mode         = pmac_probe_mode,
513         .restart                = pmac_restart,
514         .power_off              = pmac_power_off,
515         .halt                   = pmac_halt,
516         .get_boot_time          = pmac_get_boot_time,
517         .set_rtc_time           = pmac_set_rtc_time,
518         .get_rtc_time           = pmac_get_rtc_time,
519         .calibrate_decr         = pmac_calibrate_decr,
520         .feature_call           = pmac_do_feature_call,
521         .progress               = pmac_progress,
522         .check_legacy_ioport    = pmac_check_legacy_ioport,
523         .idle_loop              = native_idle,
524         .enable_pmcs            = power4_enable_pmcs,
525 };