Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[linux-2.6] / arch / powerpc / platforms / powermac / setup.c
1 /*
2  *  Powermac setup and early boot code plus other random bits.
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@samba.org)
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 #include <linux/config.h>
27 #include <linux/init.h>
28 #include <linux/errno.h>
29 #include <linux/sched.h>
30 #include <linux/kernel.h>
31 #include <linux/mm.h>
32 #include <linux/stddef.h>
33 #include <linux/unistd.h>
34 #include <linux/ptrace.h>
35 #include <linux/slab.h>
36 #include <linux/user.h>
37 #include <linux/a.out.h>
38 #include <linux/tty.h>
39 #include <linux/string.h>
40 #include <linux/delay.h>
41 #include <linux/ioport.h>
42 #include <linux/major.h>
43 #include <linux/initrd.h>
44 #include <linux/vt_kern.h>
45 #include <linux/console.h>
46 #include <linux/ide.h>
47 #include <linux/pci.h>
48 #include <linux/adb.h>
49 #include <linux/cuda.h>
50 #include <linux/pmu.h>
51 #include <linux/irq.h>
52 #include <linux/seq_file.h>
53 #include <linux/root_dev.h>
54 #include <linux/bitops.h>
55 #include <linux/suspend.h>
56
57 #include <asm/reg.h>
58 #include <asm/sections.h>
59 #include <asm/prom.h>
60 #include <asm/system.h>
61 #include <asm/pgtable.h>
62 #include <asm/io.h>
63 #include <asm/pci-bridge.h>
64 #include <asm/ohare.h>
65 #include <asm/mediabay.h>
66 #include <asm/machdep.h>
67 #include <asm/dma.h>
68 #include <asm/cputable.h>
69 #include <asm/btext.h>
70 #include <asm/pmac_feature.h>
71 #include <asm/time.h>
72 #include <asm/of_device.h>
73 #include <asm/mmu_context.h>
74 #include <asm/iommu.h>
75 #include <asm/smu.h>
76 #include <asm/pmc.h>
77 #include <asm/mpic.h>
78 #include <asm/lmb.h>
79
80 #include "pmac.h"
81
82 #undef SHOW_GATWICK_IRQS
83
84 unsigned char drive_info;
85
86 int ppc_override_l2cr = 0;
87 int ppc_override_l2cr_value;
88 int has_l2cache = 0;
89
90 int pmac_newworld = 1;
91
92 static int current_root_goodness = -1;
93
94 extern int pmac_newworld;
95 extern struct machdep_calls pmac_md;
96
97 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
98
99 #ifdef CONFIG_PPC64
100 #include <asm/udbg.h>
101 int sccdbg;
102 #endif
103
104 extern void zs_kgdb_hook(int tty_num);
105
106 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
107 EXPORT_SYMBOL(sys_ctrler);
108
109 #ifdef CONFIG_PMAC_SMU
110 unsigned long smu_cmdbuf_abs;
111 EXPORT_SYMBOL(smu_cmdbuf_abs);
112 #endif
113
114 #ifdef CONFIG_SMP
115 extern struct smp_ops_t psurge_smp_ops;
116 extern struct smp_ops_t core99_smp_ops;
117 #endif /* CONFIG_SMP */
118
119 static void pmac_show_cpuinfo(struct seq_file *m)
120 {
121         struct device_node *np;
122         char *pp;
123         int plen;
124         int mbmodel;
125         unsigned int mbflags;
126         char* mbname;
127
128         mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
129                                     PMAC_MB_INFO_MODEL, 0);
130         mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
131                                     PMAC_MB_INFO_FLAGS, 0);
132         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
133                               (long) &mbname) != 0)
134                 mbname = "Unknown";
135
136         /* find motherboard type */
137         seq_printf(m, "machine\t\t: ");
138         np = of_find_node_by_path("/");
139         if (np != NULL) {
140                 pp = (char *) get_property(np, "model", NULL);
141                 if (pp != NULL)
142                         seq_printf(m, "%s\n", pp);
143                 else
144                         seq_printf(m, "PowerMac\n");
145                 pp = (char *) get_property(np, "compatible", &plen);
146                 if (pp != NULL) {
147                         seq_printf(m, "motherboard\t:");
148                         while (plen > 0) {
149                                 int l = strlen(pp) + 1;
150                                 seq_printf(m, " %s", pp);
151                                 plen -= l;
152                                 pp += l;
153                         }
154                         seq_printf(m, "\n");
155                 }
156                 of_node_put(np);
157         } else
158                 seq_printf(m, "PowerMac\n");
159
160         /* print parsed model */
161         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
162         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
163
164         /* find l2 cache info */
165         np = of_find_node_by_name(NULL, "l2-cache");
166         if (np == NULL)
167                 np = of_find_node_by_type(NULL, "cache");
168         if (np != NULL) {
169                 unsigned int *ic = (unsigned int *)
170                         get_property(np, "i-cache-size", NULL);
171                 unsigned int *dc = (unsigned int *)
172                         get_property(np, "d-cache-size", NULL);
173                 seq_printf(m, "L2 cache\t:");
174                 has_l2cache = 1;
175                 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
176                         seq_printf(m, " %dK unified", *dc / 1024);
177                 } else {
178                         if (ic)
179                                 seq_printf(m, " %dK instruction", *ic / 1024);
180                         if (dc)
181                                 seq_printf(m, "%s %dK data",
182                                            (ic? " +": ""), *dc / 1024);
183                 }
184                 pp = get_property(np, "ram-type", NULL);
185                 if (pp)
186                         seq_printf(m, " %s", pp);
187                 seq_printf(m, "\n");
188                 of_node_put(np);
189         }
190
191         /* Indicate newworld/oldworld */
192         seq_printf(m, "pmac-generation\t: %s\n",
193                    pmac_newworld ? "NewWorld" : "OldWorld");
194 }
195
196 #ifndef CONFIG_ADB_CUDA
197 int find_via_cuda(void)
198 {
199         if (!find_devices("via-cuda"))
200                 return 0;
201         printk("WARNING ! Your machine is CUDA-based but your kernel\n");
202         printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
203         return 0;
204 }
205 #endif
206
207 #ifndef CONFIG_ADB_PMU
208 int find_via_pmu(void)
209 {
210         if (!find_devices("via-pmu"))
211                 return 0;
212         printk("WARNING ! Your machine is PMU-based but your kernel\n");
213         printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
214         return 0;
215 }
216 #endif
217
218 #ifndef CONFIG_PMAC_SMU
219 int smu_init(void)
220 {
221         /* should check and warn if SMU is present */
222         return 0;
223 }
224 #endif
225
226 #ifdef CONFIG_PPC32
227 static volatile u32 *sysctrl_regs;
228
229 static void __init ohare_init(void)
230 {
231         /* this area has the CPU identification register
232            and some registers used by smp boards */
233         sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
234
235         /*
236          * Turn on the L2 cache.
237          * We assume that we have a PSX memory controller iff
238          * we have an ohare I/O controller.
239          */
240         if (find_devices("ohare") != NULL) {
241                 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
242                         if (sysctrl_regs[4] & 0x10)
243                                 sysctrl_regs[4] |= 0x04000020;
244                         else
245                                 sysctrl_regs[4] |= 0x04000000;
246                         if(has_l2cache)
247                                 printk(KERN_INFO "Level 2 cache enabled\n");
248                 }
249         }
250 }
251
252 static void __init l2cr_init(void)
253 {
254         /* Checks "l2cr-value" property in the registry */
255         if (cpu_has_feature(CPU_FTR_L2CR)) {
256                 struct device_node *np = find_devices("cpus");
257                 if (np == 0)
258                         np = find_type_devices("cpu");
259                 if (np != 0) {
260                         unsigned int *l2cr = (unsigned int *)
261                                 get_property(np, "l2cr-value", NULL);
262                         if (l2cr != 0) {
263                                 ppc_override_l2cr = 1;
264                                 ppc_override_l2cr_value = *l2cr;
265                                 _set_L2CR(0);
266                                 _set_L2CR(ppc_override_l2cr_value);
267                         }
268                 }
269         }
270
271         if (ppc_override_l2cr)
272                 printk(KERN_INFO "L2CR overridden (0x%x), "
273                        "backside cache is %s\n",
274                        ppc_override_l2cr_value,
275                        (ppc_override_l2cr_value & 0x80000000)
276                                 ? "enabled" : "disabled");
277 }
278 #endif
279
280 void __init pmac_setup_arch(void)
281 {
282         struct device_node *cpu, *ic;
283         int *fp;
284         unsigned long pvr;
285
286         pvr = PVR_VER(mfspr(SPRN_PVR));
287
288         /* Set loops_per_jiffy to a half-way reasonable value,
289            for use until calibrate_delay gets called. */
290         loops_per_jiffy = 50000000 / HZ;
291         cpu = of_find_node_by_type(NULL, "cpu");
292         if (cpu != NULL) {
293                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
294                 if (fp != NULL) {
295                         if (pvr >= 0x30 && pvr < 0x80)
296                                 /* PPC970 etc. */
297                                 loops_per_jiffy = *fp / (3 * HZ);
298                         else if (pvr == 4 || pvr >= 8)
299                                 /* 604, G3, G4 etc. */
300                                 loops_per_jiffy = *fp / HZ;
301                         else
302                                 /* 601, 603, etc. */
303                                 loops_per_jiffy = *fp / (2 * HZ);
304                 }
305                 of_node_put(cpu);
306         }
307
308         /* See if newworld or oldworld */
309         for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; )
310                 if (get_property(ic, "interrupt-controller", NULL))
311                         break;
312         pmac_newworld = (ic != NULL);
313         if (ic)
314                 of_node_put(ic);
315
316         /* Lookup PCI hosts */
317         pmac_pci_init();
318
319 #ifdef CONFIG_PPC32
320         ohare_init();
321         l2cr_init();
322 #endif /* CONFIG_PPC32 */
323
324 #ifdef CONFIG_PPC64
325         /* Probe motherboard chipset */
326         /* this is done earlier in setup_arch for 32-bit */
327         pmac_feature_init();
328
329         /* We can NAP */
330         powersave_nap = 1;
331         printk(KERN_INFO "Using native/NAP idle loop\n");
332 #endif
333
334 #ifdef CONFIG_KGDB
335         zs_kgdb_hook(0);
336 #endif
337
338         find_via_cuda();
339         find_via_pmu();
340         smu_init();
341
342 #if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
343         pmac_nvram_init();
344 #endif
345
346 #ifdef CONFIG_PPC32
347 #ifdef CONFIG_BLK_DEV_INITRD
348         if (initrd_start)
349                 ROOT_DEV = Root_RAM0;
350         else
351 #endif
352                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
353 #endif
354
355 #ifdef CONFIG_SMP
356         /* Check for Core99 */
357         if (find_devices("uni-n") || find_devices("u3"))
358                 smp_ops = &core99_smp_ops;
359 #ifdef CONFIG_PPC32
360         else
361                 smp_ops = &psurge_smp_ops;
362 #endif
363 #endif /* CONFIG_SMP */
364 }
365
366 char *bootpath;
367 char *bootdevice;
368 void *boot_host;
369 int boot_target;
370 int boot_part;
371 extern dev_t boot_dev;
372
373 #ifdef CONFIG_SCSI
374 void __init note_scsi_host(struct device_node *node, void *host)
375 {
376         int l;
377         char *p;
378
379         l = strlen(node->full_name);
380         if (bootpath != NULL && bootdevice != NULL
381             && strncmp(node->full_name, bootdevice, l) == 0
382             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
383                 boot_host = host;
384                 /*
385                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
386                  * If you pass a path like scsi/sd@1:0 to canon, it returns
387                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
388                  * That is, the scsi target number doesn't get preserved.
389                  * So we pick the target number out of bootpath and use that.
390                  */
391                 p = strstr(bootpath, "/sd@");
392                 if (p != NULL) {
393                         p += 4;
394                         boot_target = simple_strtoul(p, NULL, 10);
395                         p = strchr(p, ':');
396                         if (p != NULL)
397                                 boot_part = simple_strtoul(p + 1, NULL, 10);
398                 }
399         }
400 }
401 EXPORT_SYMBOL(note_scsi_host);
402 #endif
403
404 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
405 static dev_t __init find_ide_boot(void)
406 {
407         char *p;
408         int n;
409         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
410
411         if (bootdevice == NULL)
412                 return 0;
413         p = strrchr(bootdevice, '/');
414         if (p == NULL)
415                 return 0;
416         n = p - bootdevice;
417
418         return pmac_find_ide_boot(bootdevice, n);
419 }
420 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
421
422 static void __init find_boot_device(void)
423 {
424 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
425         boot_dev = find_ide_boot();
426 #endif
427 }
428
429 /* TODO: Merge the suspend-to-ram with the common code !!!
430  * currently, this is a stub implementation for suspend-to-disk
431  * only
432  */
433
434 #ifdef CONFIG_SOFTWARE_SUSPEND
435
436 static int pmac_pm_prepare(suspend_state_t state)
437 {
438         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
439
440         return 0;
441 }
442
443 static int pmac_pm_enter(suspend_state_t state)
444 {
445         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
446
447         /* Giveup the lazy FPU & vec so we don't have to back them
448          * up from the low level code
449          */
450         enable_kernel_fp();
451
452 #ifdef CONFIG_ALTIVEC
453         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
454                 enable_kernel_altivec();
455 #endif /* CONFIG_ALTIVEC */
456
457         return 0;
458 }
459
460 static int pmac_pm_finish(suspend_state_t state)
461 {
462         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
463
464         /* Restore userland MMU context */
465         set_context(current->active_mm->context, current->active_mm->pgd);
466
467         return 0;
468 }
469
470 static struct pm_ops pmac_pm_ops = {
471         .pm_disk_mode   = PM_DISK_SHUTDOWN,
472         .prepare        = pmac_pm_prepare,
473         .enter          = pmac_pm_enter,
474         .finish         = pmac_pm_finish,
475 };
476
477 #endif /* CONFIG_SOFTWARE_SUSPEND */
478
479 static int initializing = 1;
480
481 static int pmac_late_init(void)
482 {
483         initializing = 0;
484 #ifdef CONFIG_SOFTWARE_SUSPEND
485         pm_set_ops(&pmac_pm_ops);
486 #endif /* CONFIG_SOFTWARE_SUSPEND */
487         return 0;
488 }
489
490 late_initcall(pmac_late_init);
491
492 /* can't be __init - can be called whenever a disk is first accessed */
493 void note_bootable_part(dev_t dev, int part, int goodness)
494 {
495         static int found_boot = 0;
496         char *p;
497
498         if (!initializing)
499                 return;
500         if ((goodness <= current_root_goodness) &&
501             ROOT_DEV != DEFAULT_ROOT_DEVICE)
502                 return;
503         p = strstr(saved_command_line, "root=");
504         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
505                 return;
506
507         if (!found_boot) {
508                 find_boot_device();
509                 found_boot = 1;
510         }
511         if (!boot_dev || dev == boot_dev) {
512                 ROOT_DEV = dev + part;
513                 boot_dev = 0;
514                 current_root_goodness = goodness;
515         }
516 }
517
518 #ifdef CONFIG_ADB_CUDA
519 static void cuda_restart(void)
520 {
521         struct adb_request req;
522
523         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
524         for (;;)
525                 cuda_poll();
526 }
527
528 static void cuda_shutdown(void)
529 {
530         struct adb_request req;
531
532         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
533         for (;;)
534                 cuda_poll();
535 }
536
537 #else
538 #define cuda_restart()
539 #define cuda_shutdown()
540 #endif
541
542 #ifndef CONFIG_ADB_PMU
543 #define pmu_restart()
544 #define pmu_shutdown()
545 #endif
546
547 #ifndef CONFIG_PMAC_SMU
548 #define smu_restart()
549 #define smu_shutdown()
550 #endif
551
552 static void pmac_restart(char *cmd)
553 {
554         switch (sys_ctrler) {
555         case SYS_CTRLER_CUDA:
556                 cuda_restart();
557                 break;
558         case SYS_CTRLER_PMU:
559                 pmu_restart();
560                 break;
561         case SYS_CTRLER_SMU:
562                 smu_restart();
563                 break;
564         default: ;
565         }
566 }
567
568 static void pmac_power_off(void)
569 {
570         switch (sys_ctrler) {
571         case SYS_CTRLER_CUDA:
572                 cuda_shutdown();
573                 break;
574         case SYS_CTRLER_PMU:
575                 pmu_shutdown();
576                 break;
577         case SYS_CTRLER_SMU:
578                 smu_shutdown();
579                 break;
580         default: ;
581         }
582 }
583
584 static void
585 pmac_halt(void)
586 {
587         pmac_power_off();
588 }
589
590 #ifdef CONFIG_PPC32
591 void __init pmac_init(void)
592 {
593         /* isa_io_base gets set in pmac_pci_init */
594         isa_mem_base = PMAC_ISA_MEM_BASE;
595         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
596         ISA_DMA_THRESHOLD = ~0L;
597         DMA_MODE_READ = 1;
598         DMA_MODE_WRITE = 2;
599
600         ppc_md = pmac_md;
601
602 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
603 #ifdef CONFIG_BLK_DEV_IDE_PMAC
604         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
605         ppc_ide_md.default_io_base      = pmac_ide_get_base;
606 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
607 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
608
609         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
610
611 }
612 #endif
613
614 /* 
615  * Early initialization.
616  */
617 static void __init pmac_init_early(void)
618 {
619 #ifdef CONFIG_PPC64
620         /* Initialize hash table, from now on, we can take hash faults
621          * and call ioremap
622          */
623         hpte_init_native();
624
625         /* Init SCC */
626         if (strstr(cmd_line, "sccdbg")) {
627                 sccdbg = 1;
628                 udbg_init_scc(NULL);
629         }
630
631         /* Setup interrupt mapping options */
632         ppc64_interrupt_controller = IC_OPEN_PIC;
633
634         iommu_init_early_u3();
635 #endif
636 }
637
638 static void __init pmac_progress(char *s, unsigned short hex)
639 {
640 #ifdef CONFIG_PPC64
641         if (sccdbg) {
642                 udbg_puts(s);
643                 udbg_puts("\n");
644                 return;
645         }
646 #endif
647 #ifdef CONFIG_BOOTX_TEXT
648         if (boot_text_mapped) {
649                 btext_drawstring(s);
650                 btext_drawchar('\n');
651         }
652 #endif /* CONFIG_BOOTX_TEXT */
653 }
654
655 /*
656  * pmac has no legacy IO, anything calling this function has to
657  * fail or bad things will happen
658  */
659 static int pmac_check_legacy_ioport(unsigned int baseport)
660 {
661         return -ENODEV;
662 }
663
664 static int __init pmac_declare_of_platform_devices(void)
665 {
666         struct device_node *np, *npp;
667
668         np = find_devices("uni-n");
669         if (np) {
670                 for (np = np->child; np != NULL; np = np->sibling)
671                         if (strncmp(np->name, "i2c", 3) == 0) {
672                                 of_platform_device_create(np, "uni-n-i2c",
673                                                           NULL);
674                                 break;
675                         }
676         }
677         np = find_devices("valkyrie");
678         if (np)
679                 of_platform_device_create(np, "valkyrie", NULL);
680         np = find_devices("platinum");
681         if (np)
682                 of_platform_device_create(np, "platinum", NULL);
683
684         npp = of_find_node_by_name(NULL, "u3");
685         if (npp) {
686                 for (np = NULL; (np = of_get_next_child(npp, np)) != NULL;) {
687                         if (strncmp(np->name, "i2c", 3) == 0) {
688                                 of_platform_device_create(np, "u3-i2c", NULL);
689                                 of_node_put(np);
690                                 break;
691                         }
692                 }
693                 of_node_put(npp);
694         }
695         np = of_find_node_by_type(NULL, "smu");
696         if (np) {
697                 of_platform_device_create(np, "smu", NULL);
698                 of_node_put(np);
699         }
700
701         return 0;
702 }
703
704 device_initcall(pmac_declare_of_platform_devices);
705
706 /*
707  * Called very early, MMU is off, device-tree isn't unflattened
708  */
709 static int __init pmac_probe(int platform)
710 {
711 #ifdef CONFIG_PPC64
712         if (platform != PLATFORM_POWERMAC)
713                 return 0;
714
715         /*
716          * On U3, the DART (iommu) must be allocated now since it
717          * has an impact on htab_initialize (due to the large page it
718          * occupies having to be broken up so the DART itself is not
719          * part of the cacheable linar mapping
720          */
721         alloc_u3_dart_table();
722 #endif
723
724 #ifdef CONFIG_PMAC_SMU
725         /*
726          * SMU based G5s need some memory below 2Gb, at least the current
727          * driver needs that. We have to allocate it now. We allocate 4k
728          * (1 small page) for now.
729          */
730         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
731 #endif /* CONFIG_PMAC_SMU */
732
733         return 1;
734 }
735
736 #ifdef CONFIG_PPC64
737 static int pmac_probe_mode(struct pci_bus *bus)
738 {
739         struct device_node *node = bus->sysdata;
740
741         /* We need to use normal PCI probing for the AGP bus,
742            since the device for the AGP bridge isn't in the tree. */
743         if (bus->self == NULL && device_is_compatible(node, "u3-agp"))
744                 return PCI_PROBE_NORMAL;
745
746         return PCI_PROBE_DEVTREE;
747 }
748 #endif
749
750 struct machdep_calls __initdata pmac_md = {
751 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
752         .cpu_die                = generic_mach_cpu_die,
753 #endif
754         .probe                  = pmac_probe,
755         .setup_arch             = pmac_setup_arch,
756         .init_early             = pmac_init_early,
757         .show_cpuinfo           = pmac_show_cpuinfo,
758         .init_IRQ               = pmac_pic_init,
759         .get_irq                = mpic_get_irq, /* changed later */
760         .pcibios_fixup          = pmac_pcibios_fixup,
761         .restart                = pmac_restart,
762         .power_off              = pmac_power_off,
763         .halt                   = pmac_halt,
764         .time_init              = pmac_time_init,
765         .get_boot_time          = pmac_get_boot_time,
766         .set_rtc_time           = pmac_set_rtc_time,
767         .get_rtc_time           = pmac_get_rtc_time,
768         .calibrate_decr         = pmac_calibrate_decr,
769         .feature_call           = pmac_do_feature_call,
770         .check_legacy_ioport    = pmac_check_legacy_ioport,
771         .progress               = pmac_progress,
772 #ifdef CONFIG_PPC64
773         .pci_probe_mode         = pmac_probe_mode,
774         .idle_loop              = native_idle,
775         .enable_pmcs            = power4_enable_pmcs,
776 #endif
777 #ifdef CONFIG_PPC32
778         .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
779         .pcibios_after_init     = pmac_pcibios_after_init,
780         .phys_mem_access_prot   = pci_phys_mem_access_prot,
781 #endif
782 };