powerpc: Fix new-world powermac detection
[linux-3.10.git] / 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
79 #include "pmac.h"
80
81 #undef SHOW_GATWICK_IRQS
82
83 unsigned char drive_info;
84
85 int ppc_override_l2cr = 0;
86 int ppc_override_l2cr_value;
87 int has_l2cache = 0;
88
89 int pmac_newworld = 1;
90
91 static int current_root_goodness = -1;
92
93 extern int pmac_newworld;
94 extern struct machdep_calls pmac_md;
95
96 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
97
98 #ifdef CONFIG_PPC64
99 #include <asm/udbg.h>
100 int sccdbg;
101 #endif
102
103 extern void zs_kgdb_hook(int tty_num);
104
105 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
106 EXPORT_SYMBOL(sys_ctrler);
107
108 #ifdef CONFIG_PMAC_SMU
109 unsigned long smu_cmdbuf_abs;
110 EXPORT_SYMBOL(smu_cmdbuf_abs);
111 #endif
112
113 #ifdef CONFIG_SMP
114 extern struct smp_ops_t psurge_smp_ops;
115 extern struct smp_ops_t core99_smp_ops;
116 #endif /* CONFIG_SMP */
117
118 static void pmac_show_cpuinfo(struct seq_file *m)
119 {
120         struct device_node *np;
121         char *pp;
122         int plen;
123         int mbmodel;
124         unsigned int mbflags;
125         char* mbname;
126
127         mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
128                                     PMAC_MB_INFO_MODEL, 0);
129         mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
130                                     PMAC_MB_INFO_FLAGS, 0);
131         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
132                               (long) &mbname) != 0)
133                 mbname = "Unknown";
134
135         /* find motherboard type */
136         seq_printf(m, "machine\t\t: ");
137         np = of_find_node_by_path("/");
138         if (np != NULL) {
139                 pp = (char *) get_property(np, "model", NULL);
140                 if (pp != NULL)
141                         seq_printf(m, "%s\n", pp);
142                 else
143                         seq_printf(m, "PowerMac\n");
144                 pp = (char *) get_property(np, "compatible", &plen);
145                 if (pp != NULL) {
146                         seq_printf(m, "motherboard\t:");
147                         while (plen > 0) {
148                                 int l = strlen(pp) + 1;
149                                 seq_printf(m, " %s", pp);
150                                 plen -= l;
151                                 pp += l;
152                         }
153                         seq_printf(m, "\n");
154                 }
155                 of_node_put(np);
156         } else
157                 seq_printf(m, "PowerMac\n");
158
159         /* print parsed model */
160         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
161         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
162
163         /* find l2 cache info */
164         np = of_find_node_by_name(NULL, "l2-cache");
165         if (np == NULL)
166                 np = of_find_node_by_type(NULL, "cache");
167         if (np != NULL) {
168                 unsigned int *ic = (unsigned int *)
169                         get_property(np, "i-cache-size", NULL);
170                 unsigned int *dc = (unsigned int *)
171                         get_property(np, "d-cache-size", NULL);
172                 seq_printf(m, "L2 cache\t:");
173                 has_l2cache = 1;
174                 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
175                         seq_printf(m, " %dK unified", *dc / 1024);
176                 } else {
177                         if (ic)
178                                 seq_printf(m, " %dK instruction", *ic / 1024);
179                         if (dc)
180                                 seq_printf(m, "%s %dK data",
181                                            (ic? " +": ""), *dc / 1024);
182                 }
183                 pp = get_property(np, "ram-type", NULL);
184                 if (pp)
185                         seq_printf(m, " %s", pp);
186                 seq_printf(m, "\n");
187                 of_node_put(np);
188         }
189
190         /* Indicate newworld/oldworld */
191         seq_printf(m, "pmac-generation\t: %s\n",
192                    pmac_newworld ? "NewWorld" : "OldWorld");
193 }
194
195 static void pmac_show_percpuinfo(struct seq_file *m, int i)
196 {
197 #ifdef CONFIG_CPU_FREQ_PMAC
198         extern unsigned int pmac_get_one_cpufreq(int i);
199         unsigned int freq = pmac_get_one_cpufreq(i);
200         if (freq != 0) {
201                 seq_printf(m, "clock\t\t: %dMHz\n", freq/1000);
202                 return;
203         }
204 #endif /* CONFIG_CPU_FREQ_PMAC */
205 }
206
207 #ifndef CONFIG_ADB_CUDA
208 int find_via_cuda(void)
209 {
210         if (!find_devices("via-cuda"))
211                 return 0;
212         printk("WARNING ! Your machine is CUDA-based but your kernel\n");
213         printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
214         return 0;
215 }
216 #endif
217
218 #ifndef CONFIG_ADB_PMU
219 int find_via_pmu(void)
220 {
221         if (!find_devices("via-pmu"))
222                 return 0;
223         printk("WARNING ! Your machine is PMU-based but your kernel\n");
224         printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
225         return 0;
226 }
227 #endif
228
229 #ifndef CONFIG_PMAC_SMU
230 int smu_init(void)
231 {
232         /* should check and warn if SMU is present */
233         return 0;
234 }
235 #endif
236
237 #ifdef CONFIG_PPC32
238 static volatile u32 *sysctrl_regs;
239
240 static void __init ohare_init(void)
241 {
242         /* this area has the CPU identification register
243            and some registers used by smp boards */
244         sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
245
246         /*
247          * Turn on the L2 cache.
248          * We assume that we have a PSX memory controller iff
249          * we have an ohare I/O controller.
250          */
251         if (find_devices("ohare") != NULL) {
252                 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
253                         if (sysctrl_regs[4] & 0x10)
254                                 sysctrl_regs[4] |= 0x04000020;
255                         else
256                                 sysctrl_regs[4] |= 0x04000000;
257                         if(has_l2cache)
258                                 printk(KERN_INFO "Level 2 cache enabled\n");
259                 }
260         }
261 }
262
263 static void __init l2cr_init(void)
264 {
265         /* Checks "l2cr-value" property in the registry */
266         if (cpu_has_feature(CPU_FTR_L2CR)) {
267                 struct device_node *np = find_devices("cpus");
268                 if (np == 0)
269                         np = find_type_devices("cpu");
270                 if (np != 0) {
271                         unsigned int *l2cr = (unsigned int *)
272                                 get_property(np, "l2cr-value", NULL);
273                         if (l2cr != 0) {
274                                 ppc_override_l2cr = 1;
275                                 ppc_override_l2cr_value = *l2cr;
276                                 _set_L2CR(0);
277                                 _set_L2CR(ppc_override_l2cr_value);
278                         }
279                 }
280         }
281
282         if (ppc_override_l2cr)
283                 printk(KERN_INFO "L2CR overridden (0x%x), "
284                        "backside cache is %s\n",
285                        ppc_override_l2cr_value,
286                        (ppc_override_l2cr_value & 0x80000000)
287                                 ? "enabled" : "disabled");
288 }
289 #endif
290
291 void __init pmac_setup_arch(void)
292 {
293         struct device_node *cpu, *ic;
294         int *fp;
295         unsigned long pvr;
296
297         pvr = PVR_VER(mfspr(SPRN_PVR));
298
299         /* Set loops_per_jiffy to a half-way reasonable value,
300            for use until calibrate_delay gets called. */
301         loops_per_jiffy = 50000000 / HZ;
302         cpu = of_find_node_by_type(NULL, "cpu");
303         if (cpu != NULL) {
304                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
305                 if (fp != NULL) {
306                         if (pvr >= 0x30 && pvr < 0x80)
307                                 /* PPC970 etc. */
308                                 loops_per_jiffy = *fp / (3 * HZ);
309                         else if (pvr == 4 || pvr >= 8)
310                                 /* 604, G3, G4 etc. */
311                                 loops_per_jiffy = *fp / HZ;
312                         else
313                                 /* 601, 603, etc. */
314                                 loops_per_jiffy = *fp / (2 * HZ);
315                 }
316                 of_node_put(cpu);
317         }
318
319         /* See if newworld or oldworld */
320         for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; )
321                 if (get_property(ic, "interrupt-controller", NULL))
322                         break;
323         pmac_newworld = (ic != NULL);
324         if (ic)
325                 of_node_put(ic);
326
327         /* Lookup PCI hosts */
328         pmac_pci_init();
329
330 #ifdef CONFIG_PPC32
331         ohare_init();
332         l2cr_init();
333 #endif /* CONFIG_PPC32 */
334
335 #ifdef CONFIG_PPC64
336         /* Probe motherboard chipset */
337         /* this is done earlier in setup_arch for 32-bit */
338         pmac_feature_init();
339
340         /* We can NAP */
341         powersave_nap = 1;
342         printk(KERN_INFO "Using native/NAP idle loop\n");
343 #endif
344
345 #ifdef CONFIG_KGDB
346         zs_kgdb_hook(0);
347 #endif
348
349         find_via_cuda();
350         find_via_pmu();
351         smu_init();
352
353 #ifdef CONFIG_NVRAM
354         pmac_nvram_init();
355 #endif
356
357 #ifdef CONFIG_PPC32
358 #ifdef CONFIG_BLK_DEV_INITRD
359         if (initrd_start)
360                 ROOT_DEV = Root_RAM0;
361         else
362 #endif
363                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
364 #endif
365
366 #ifdef CONFIG_SMP
367         /* Check for Core99 */
368         if (find_devices("uni-n") || find_devices("u3"))
369                 smp_ops = &core99_smp_ops;
370 #ifdef CONFIG_PPC32
371         else
372                 smp_ops = &psurge_smp_ops;
373 #endif
374 #endif /* CONFIG_SMP */
375 }
376
377 char *bootpath;
378 char *bootdevice;
379 void *boot_host;
380 int boot_target;
381 int boot_part;
382 extern dev_t boot_dev;
383
384 #ifdef CONFIG_SCSI
385 void __init note_scsi_host(struct device_node *node, void *host)
386 {
387         int l;
388         char *p;
389
390         l = strlen(node->full_name);
391         if (bootpath != NULL && bootdevice != NULL
392             && strncmp(node->full_name, bootdevice, l) == 0
393             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
394                 boot_host = host;
395                 /*
396                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
397                  * If you pass a path like scsi/sd@1:0 to canon, it returns
398                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
399                  * That is, the scsi target number doesn't get preserved.
400                  * So we pick the target number out of bootpath and use that.
401                  */
402                 p = strstr(bootpath, "/sd@");
403                 if (p != NULL) {
404                         p += 4;
405                         boot_target = simple_strtoul(p, NULL, 10);
406                         p = strchr(p, ':');
407                         if (p != NULL)
408                                 boot_part = simple_strtoul(p + 1, NULL, 10);
409                 }
410         }
411 }
412 EXPORT_SYMBOL(note_scsi_host);
413 #endif
414
415 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
416 static dev_t __init find_ide_boot(void)
417 {
418         char *p;
419         int n;
420         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
421
422         if (bootdevice == NULL)
423                 return 0;
424         p = strrchr(bootdevice, '/');
425         if (p == NULL)
426                 return 0;
427         n = p - bootdevice;
428
429         return pmac_find_ide_boot(bootdevice, n);
430 }
431 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
432
433 static void __init find_boot_device(void)
434 {
435 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
436         boot_dev = find_ide_boot();
437 #endif
438 }
439
440 /* TODO: Merge the suspend-to-ram with the common code !!!
441  * currently, this is a stub implementation for suspend-to-disk
442  * only
443  */
444
445 #ifdef CONFIG_SOFTWARE_SUSPEND
446
447 static int pmac_pm_prepare(suspend_state_t state)
448 {
449         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
450
451         return 0;
452 }
453
454 static int pmac_pm_enter(suspend_state_t state)
455 {
456         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
457
458         /* Giveup the lazy FPU & vec so we don't have to back them
459          * up from the low level code
460          */
461         enable_kernel_fp();
462
463 #ifdef CONFIG_ALTIVEC
464         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
465                 enable_kernel_altivec();
466 #endif /* CONFIG_ALTIVEC */
467
468         return 0;
469 }
470
471 static int pmac_pm_finish(suspend_state_t state)
472 {
473         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
474
475         /* Restore userland MMU context */
476         set_context(current->active_mm->context, current->active_mm->pgd);
477
478         return 0;
479 }
480
481 static struct pm_ops pmac_pm_ops = {
482         .pm_disk_mode   = PM_DISK_SHUTDOWN,
483         .prepare        = pmac_pm_prepare,
484         .enter          = pmac_pm_enter,
485         .finish         = pmac_pm_finish,
486 };
487
488 #endif /* CONFIG_SOFTWARE_SUSPEND */
489
490 static int initializing = 1;
491
492 static int pmac_late_init(void)
493 {
494         initializing = 0;
495 #ifdef CONFIG_SOFTWARE_SUSPEND
496         pm_set_ops(&pmac_pm_ops);
497 #endif /* CONFIG_SOFTWARE_SUSPEND */
498         return 0;
499 }
500
501 late_initcall(pmac_late_init);
502
503 /* can't be __init - can be called whenever a disk is first accessed */
504 void note_bootable_part(dev_t dev, int part, int goodness)
505 {
506         static int found_boot = 0;
507         char *p;
508
509         if (!initializing)
510                 return;
511         if ((goodness <= current_root_goodness) &&
512             ROOT_DEV != DEFAULT_ROOT_DEVICE)
513                 return;
514         p = strstr(saved_command_line, "root=");
515         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
516                 return;
517
518         if (!found_boot) {
519                 find_boot_device();
520                 found_boot = 1;
521         }
522         if (!boot_dev || dev == boot_dev) {
523                 ROOT_DEV = dev + part;
524                 boot_dev = 0;
525                 current_root_goodness = goodness;
526         }
527 }
528
529 #ifdef CONFIG_ADB_CUDA
530 static void cuda_restart(void)
531 {
532         struct adb_request req;
533
534         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
535         for (;;)
536                 cuda_poll();
537 }
538
539 static void cuda_shutdown(void)
540 {
541         struct adb_request req;
542
543         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
544         for (;;)
545                 cuda_poll();
546 }
547
548 #else
549 #define cuda_restart()
550 #define cuda_shutdown()
551 #endif
552
553 #ifndef CONFIG_ADB_PMU
554 #define pmu_restart()
555 #define pmu_shutdown()
556 #endif
557
558 #ifndef CONFIG_PMAC_SMU
559 #define smu_restart()
560 #define smu_shutdown()
561 #endif
562
563 static void pmac_restart(char *cmd)
564 {
565         switch (sys_ctrler) {
566         case SYS_CTRLER_CUDA:
567                 cuda_restart();
568                 break;
569         case SYS_CTRLER_PMU:
570                 pmu_restart();
571                 break;
572         case SYS_CTRLER_SMU:
573                 smu_restart();
574                 break;
575         default: ;
576         }
577 }
578
579 static void pmac_power_off(void)
580 {
581         switch (sys_ctrler) {
582         case SYS_CTRLER_CUDA:
583                 cuda_shutdown();
584                 break;
585         case SYS_CTRLER_PMU:
586                 pmu_shutdown();
587                 break;
588         case SYS_CTRLER_SMU:
589                 smu_shutdown();
590                 break;
591         default: ;
592         }
593 }
594
595 static void
596 pmac_halt(void)
597 {
598         pmac_power_off();
599 }
600
601 #ifdef CONFIG_PPC32
602 void __init pmac_init(void)
603 {
604         /* isa_io_base gets set in pmac_pci_init */
605         isa_mem_base = PMAC_ISA_MEM_BASE;
606         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
607         ISA_DMA_THRESHOLD = ~0L;
608         DMA_MODE_READ = 1;
609         DMA_MODE_WRITE = 2;
610
611         ppc_md = pmac_md;
612
613 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
614 #ifdef CONFIG_BLK_DEV_IDE_PMAC
615         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
616         ppc_ide_md.default_io_base      = pmac_ide_get_base;
617 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
618 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
619
620         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
621
622 }
623 #endif
624
625 /* 
626  * Early initialization.
627  */
628 static void __init pmac_init_early(void)
629 {
630 #ifdef CONFIG_PPC64
631         /* Initialize hash table, from now on, we can take hash faults
632          * and call ioremap
633          */
634         hpte_init_native();
635
636         /* Init SCC */
637         if (strstr(cmd_line, "sccdbg")) {
638                 sccdbg = 1;
639                 udbg_init_scc(NULL);
640         }
641
642         /* Setup interrupt mapping options */
643         ppc64_interrupt_controller = IC_OPEN_PIC;
644
645         iommu_init_early_u3();
646 #endif
647 }
648
649 static void __init pmac_progress(char *s, unsigned short hex)
650 {
651 #ifdef CONFIG_PPC64
652         if (sccdbg) {
653                 udbg_puts(s);
654                 udbg_puts("\n");
655                 return;
656         }
657 #endif
658 #ifdef CONFIG_BOOTX_TEXT
659         if (boot_text_mapped) {
660                 btext_drawstring(s);
661                 btext_drawchar('\n');
662         }
663 #endif /* CONFIG_BOOTX_TEXT */
664 }
665
666 /*
667  * pmac has no legacy IO, anything calling this function has to
668  * fail or bad things will happen
669  */
670 static int pmac_check_legacy_ioport(unsigned int baseport)
671 {
672         return -ENODEV;
673 }
674
675 static int __init pmac_declare_of_platform_devices(void)
676 {
677         struct device_node *np, *npp;
678
679         np = find_devices("uni-n");
680         if (np) {
681                 for (np = np->child; np != NULL; np = np->sibling)
682                         if (strncmp(np->name, "i2c", 3) == 0) {
683                                 of_platform_device_create(np, "uni-n-i2c",
684                                                           NULL);
685                                 break;
686                         }
687         }
688         np = find_devices("valkyrie");
689         if (np)
690                 of_platform_device_create(np, "valkyrie", NULL);
691         np = find_devices("platinum");
692         if (np)
693                 of_platform_device_create(np, "platinum", NULL);
694
695         npp = of_find_node_by_name(NULL, "u3");
696         if (npp) {
697                 for (np = NULL; (np = of_get_next_child(npp, np)) != NULL;) {
698                         if (strncmp(np->name, "i2c", 3) == 0) {
699                                 of_platform_device_create(np, "u3-i2c", NULL);
700                                 of_node_put(np);
701                                 break;
702                         }
703                 }
704                 of_node_put(npp);
705         }
706         np = of_find_node_by_type(NULL, "smu");
707         if (np) {
708                 of_platform_device_create(np, "smu", NULL);
709                 of_node_put(np);
710         }
711
712         return 0;
713 }
714
715 device_initcall(pmac_declare_of_platform_devices);
716
717 /*
718  * Called very early, MMU is off, device-tree isn't unflattened
719  */
720 static int __init pmac_probe(int platform)
721 {
722 #ifdef CONFIG_PPC64
723         if (platform != PLATFORM_POWERMAC)
724                 return 0;
725
726         /*
727          * On U3, the DART (iommu) must be allocated now since it
728          * has an impact on htab_initialize (due to the large page it
729          * occupies having to be broken up so the DART itself is not
730          * part of the cacheable linar mapping
731          */
732         alloc_u3_dart_table();
733 #endif
734
735 #ifdef CONFIG_PMAC_SMU
736         /*
737          * SMU based G5s need some memory below 2Gb, at least the current
738          * driver needs that. We have to allocate it now. We allocate 4k
739          * (1 small page) for now.
740          */
741         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
742 #endif /* CONFIG_PMAC_SMU */
743
744         return 1;
745 }
746
747 #ifdef CONFIG_PPC64
748 static int pmac_probe_mode(struct pci_bus *bus)
749 {
750         struct device_node *node = bus->sysdata;
751
752         /* We need to use normal PCI probing for the AGP bus,
753            since the device for the AGP bridge isn't in the tree. */
754         if (bus->self == NULL && device_is_compatible(node, "u3-agp"))
755                 return PCI_PROBE_NORMAL;
756
757         return PCI_PROBE_DEVTREE;
758 }
759 #endif
760
761 struct machdep_calls __initdata pmac_md = {
762 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
763         .cpu_die                = generic_mach_cpu_die,
764 #endif
765         .probe                  = pmac_probe,
766         .setup_arch             = pmac_setup_arch,
767         .init_early             = pmac_init_early,
768         .show_cpuinfo           = pmac_show_cpuinfo,
769         .show_percpuinfo        = pmac_show_percpuinfo,
770         .init_IRQ               = pmac_pic_init,
771         .get_irq                = mpic_get_irq, /* changed later */
772         .pcibios_fixup          = pmac_pcibios_fixup,
773         .restart                = pmac_restart,
774         .power_off              = pmac_power_off,
775         .halt                   = pmac_halt,
776         .time_init              = pmac_time_init,
777         .get_boot_time          = pmac_get_boot_time,
778         .set_rtc_time           = pmac_set_rtc_time,
779         .get_rtc_time           = pmac_get_rtc_time,
780         .calibrate_decr         = pmac_calibrate_decr,
781         .feature_call           = pmac_do_feature_call,
782         .check_legacy_ioport    = pmac_check_legacy_ioport,
783         .progress               = pmac_progress,
784 #ifdef CONFIG_PPC64
785         .pci_probe_mode         = pmac_probe_mode,
786         .idle_loop              = native_idle,
787         .enable_pmcs            = power4_enable_pmcs,
788 #endif
789 #ifdef CONFIG_PPC32
790         .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
791         .pcibios_after_init     = pmac_pcibios_after_init,
792         .phys_mem_access_prot   = pci_phys_mem_access_prot,
793 #endif
794 };