xref: /linux/arch/powerpc/platforms/powermac/setup.c (revision 9ce7677cfd7cd871adb457c80bea3b581b839641) 
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 };
783