aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/powermac/setup.c
blob: 1b12bf9956cb25dc128f4c2bba0b96f1961e2cc1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
/*
 *  arch/ppc/platforms/setup.c
 *
 *  PowerPC version
 *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
 *
 *  Adapted for Power Macintosh by Paul Mackerras
 *    Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
 *
 *  Derived from "arch/alpha/kernel/setup.c"
 *    Copyright (C) 1995 Linus Torvalds
 *
 *  Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version
 *  2 of the License, or (at your option) any later version.
 *
 */

/*
 * bootup setup stuff..
 */

#include <linux/config.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/major.h>
#include <linux/initrd.h>
#include <linux/vt_kern.h>
#include <linux/console.h>
#include <linux/ide.h>
#include <linux/pci.h>
#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/pmu.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/bitops.h>
#include <linux/suspend.h>

#include <asm/reg.h>
#include <asm/sections.h>
#include <asm/prom.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/pci-bridge.h>
#include <asm/ohare.h>
#include <asm/mediabay.h>
#include <asm/machdep.h>
#include <asm/dma.h>
#include <asm/bootx.h>
#include <asm/cputable.h>
#include <asm/btext.h>
#include <asm/pmac_feature.h>
#include <asm/time.h>
#include <asm/of_device.h>
#include <asm/mmu_context.h>

#include "pmac_pic.h"

#undef SHOW_GATWICK_IRQS

extern long pmac_time_init(void);
extern unsigned long pmac_get_rtc_time(void);
extern int pmac_set_rtc_time(unsigned long nowtime);
extern void pmac_read_rtc_time(void);
extern void pmac_calibrate_decr(void);
extern void pmac_pcibios_fixup(void);
extern void pmac_find_bridges(void);
extern unsigned long pmac_ide_get_base(int index);
extern void pmac_ide_init_hwif_ports(hw_regs_t *hw,
	unsigned long data_port, unsigned long ctrl_port, int *irq);

extern void pmac_nvram_update(void);
extern unsigned char pmac_nvram_read_byte(int addr);
extern void pmac_nvram_write_byte(int addr, unsigned char val);
extern int pmac_pci_enable_device_hook(struct pci_dev *dev, int initial);
extern void pmac_pcibios_after_init(void);
extern int of_show_percpuinfo(struct seq_file *m, int i);

unsigned char drive_info;

int ppc_override_l2cr = 0;
int ppc_override_l2cr_value;
int has_l2cache = 0;

int pmac_newworld = 1;

static int current_root_goodness = -1;

extern int pmac_newworld;

#define DEFAULT_ROOT_DEVICE Root_SDA1	/* sda1 - slightly silly choice */

extern void zs_kgdb_hook(int tty_num);
static void ohare_init(void);
#ifdef CONFIG_BOOTX_TEXT
static void pmac_progress(char *s, unsigned short hex);
#endif

sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;

#ifdef CONFIG_SMP
extern struct smp_ops_t psurge_smp_ops;
extern struct smp_ops_t core99_smp_ops;
#endif /* CONFIG_SMP */

static int
pmac_show_cpuinfo(struct seq_file *m)
{
	struct device_node *np;
	char *pp;
	int plen;
	int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
		NULL, PMAC_MB_INFO_MODEL, 0);
	unsigned int mbflags = (unsigned int)pmac_call_feature(PMAC_FTR_GET_MB_INFO,
		NULL, PMAC_MB_INFO_FLAGS, 0);
	char* mbname;

	if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, (int)&mbname) != 0)
		mbname = "Unknown";

	/* find motherboard type */
	seq_printf(m, "machine\t\t: ");
	np = find_devices("device-tree");
	if (np != NULL) {
		pp = (char *) get_property(np, "model", NULL);
		if (pp != NULL)
			seq_printf(m, "%s\n", pp);
		else
			seq_printf(m, "PowerMac\n");
		pp = (char *) get_property(np, "compatible", &plen);
		if (pp != NULL) {
			seq_printf(m, "motherboard\t:");
			while (plen > 0) {
				int l = strlen(pp) + 1;
				seq_printf(m, " %s", pp);
				plen -= l;
				pp += l;
			}
			seq_printf(m, "\n");
		}
	} else
		seq_printf(m, "PowerMac\n");

	/* print parsed model */
	seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
	seq_printf(m, "pmac flags\t: %08x\n", mbflags);

	/* find l2 cache info */
	np = find_devices("l2-cache");
	if (np == 0)
		np = find_type_devices("cache");
	if (np != 0) {
		unsigned int *ic = (unsigned int *)
			get_property(np, "i-cache-size", NULL);
		unsigned int *dc = (unsigned int *)
			get_property(np, "d-cache-size", NULL);
		seq_printf(m, "L2 cache\t:");
		has_l2cache = 1;
		if (get_property(np, "cache-unified", NULL) != 0 && dc) {
			seq_printf(m, " %dK unified", *dc / 1024);
		} else {
			if (ic)
				seq_printf(m, " %dK instruction", *ic / 1024);
			if (dc)
				seq_printf(m, "%s %dK data",
					   (ic? " +": ""), *dc / 1024);
		}
		pp = get_property(np, "ram-type", NULL);
		if (pp)
			seq_printf(m, " %s", pp);
		seq_printf(m, "\n");
	}

	/* find ram info */
	np = find_devices("memory");
	if (np != 0) {
		int n;
		struct reg_property *reg = (struct reg_property *)
			get_property(np, "reg", &n);

		if (reg != 0) {
			unsigned long total = 0;

			for (n /= sizeof(struct reg_property); n > 0; --n)
				total += (reg++)->size;
			seq_printf(m, "memory\t\t: %luMB\n", total >> 20);
		}
	}

	/* Checks "l2cr-value" property in the registry */
	np = find_devices("cpus");
	if (np == 0)
		np = find_type_devices("cpu");
	if (np != 0) {
		unsigned int *l2cr = (unsigned int *)
			get_property(np, "l2cr-value", NULL);
		if (l2cr != 0) {
			seq_printf(m, "l2cr override\t: 0x%x\n", *l2cr);
		}
	}

	/* Indicate newworld/oldworld */
	seq_printf(m, "pmac-generation\t: %s\n",
		   pmac_newworld ? "NewWorld" : "OldWorld");


	return 0;
}

static int
pmac_show_percpuinfo(struct seq_file *m, int i)
{
#ifdef CONFIG_CPU_FREQ_PMAC
	extern unsigned int pmac_get_one_cpufreq(int i);
	unsigned int freq = pmac_get_one_cpufreq(i);
	if (freq != 0) {
		seq_printf(m, "clock\t\t: %dMHz\n", freq/1000);
		return 0;
	}
#endif /* CONFIG_CPU_FREQ_PMAC */
	return of_show_percpuinfo(m, i);
}

static volatile u32 *sysctrl_regs;

void __init
pmac_setup_arch(void)
{
	struct device_node *cpu;
	int *fp;
	unsigned long pvr;

	pvr = PVR_VER(mfspr(SPRN_PVR));

	/* Set loops_per_jiffy to a half-way reasonable value,
	   for use until calibrate_delay gets called. */
	cpu = find_type_devices("cpu");
	if (cpu != 0) {
		fp = (int *) get_property(cpu, "clock-frequency", NULL);
		if (fp != 0) {
			if (pvr == 4 || pvr >= 8)
				/* 604, G3, G4 etc. */
				loops_per_jiffy = *fp / HZ;
			else
				/* 601, 603, etc. */
				loops_per_jiffy = *fp / (2*HZ);
		} else
			loops_per_jiffy = 50000000 / HZ;
	}

	/* this area has the CPU identification register
	   and some registers used by smp boards */
	sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
	ohare_init();

	/* Lookup PCI hosts */
	pmac_find_bridges();

	/* Checks "l2cr-value" property in the registry */
	if (cpu_has_feature(CPU_FTR_L2CR)) {
		struct device_node *np = find_devices("cpus");
		if (np == 0)
			np = find_type_devices("cpu");
		if (np != 0) {
			unsigned int *l2cr = (unsigned int *)
				get_property(np, "l2cr-value", NULL);
			if (l2cr != 0) {
				ppc_override_l2cr = 1;
				ppc_override_l2cr_value = *l2cr;
				_set_L2CR(0);
				_set_L2CR(ppc_override_l2cr_value);
			}
		}
	}

	if (ppc_override_l2cr)
		printk(KERN_INFO "L2CR overriden (0x%x), backside cache is %s\n",
			ppc_override_l2cr_value, (ppc_override_l2cr_value & 0x80000000)
				? "enabled" : "disabled");

#ifdef CONFIG_KGDB
	zs_kgdb_hook(0);
#endif

#ifdef CONFIG_ADB_CUDA
	find_via_cuda();
#else
	if (find_devices("via-cuda")) {
		printk("WARNING ! Your machine is Cuda based but your kernel\n");
		printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
	}
#endif
#ifdef CONFIG_ADB_PMU
	find_via_pmu();
#else
	if (find_devices("via-pmu")) {
		printk("WARNING ! Your machine is PMU based but your kernel\n");
		printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
	}
#endif
#ifdef CONFIG_NVRAM
	pmac_nvram_init();
#endif
#ifdef CONFIG_BLK_DEV_INITRD
	if (initrd_start)
		ROOT_DEV = Root_RAM0;
	else
#endif
		ROOT_DEV = DEFAULT_ROOT_DEVICE;

#ifdef CONFIG_SMP
	/* Check for Core99 */
	if (find_devices("uni-n") || find_devices("u3"))
		ppc_md.smp_ops = &core99_smp_ops;
	else
		ppc_md.smp_ops = &psurge_smp_ops;
#endif /* CONFIG_SMP */

	pci_create_OF_bus_map();
}

static void __init ohare_init(void)
{
	/*
	 * Turn on the L2 cache.
	 * We assume that we have a PSX memory controller iff
	 * we have an ohare I/O controller.
	 */
	if (find_devices("ohare") != NULL) {
		if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
			if (sysctrl_regs[4] & 0x10)
				sysctrl_regs[4] |= 0x04000020;
			else
				sysctrl_regs[4] |= 0x04000000;
			if(has_l2cache)
				printk(KERN_INFO "Level 2 cache enabled\n");
		}
	}
}

char *bootpath;
char *bootdevice;
void *boot_host;
int boot_target;
int boot_part;
extern dev_t boot_dev;

#ifdef CONFIG_SCSI
void __init
note_scsi_host(struct device_node *node, void *host)
{
	int l;
	char *p;

	l = strlen(node->full_name);
	if (bootpath != NULL && bootdevice != NULL
	    && strncmp(node->full_name, bootdevice, l) == 0
	    && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
		boot_host = host;
		/*
		 * There's a bug in OF 1.0.5.  (Why am I not surprised.)
		 * If you pass a path like scsi/sd@1:0 to canon, it returns
		 * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
		 * That is, the scsi target number doesn't get preserved.
		 * So we pick the target number out of bootpath and use that.
		 */
		p = strstr(bootpath, "/sd@");
		if (p != NULL) {
			p += 4;
			boot_target = simple_strtoul(p, NULL, 10);
			p = strchr(p, ':');
			if (p != NULL)
				boot_part = simple_strtoul(p + 1, NULL, 10);
		}
	}
}
EXPORT_SYMBOL(note_scsi_host);
#endif

#if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
static dev_t __init
find_ide_boot(void)
{
	char *p;
	int n;
	dev_t __init pmac_find_ide_boot(char *bootdevice, int n);

	if (bootdevice == NULL)
		return 0;
	p = strrchr(bootdevice, '/');
	if (p == NULL)
		return 0;
	n = p - bootdevice;

	return pmac_find_ide_boot(bootdevice, n);
}
#endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */

static void __init
find_boot_device(void)
{
#if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
	boot_dev = find_ide_boot();
#endif
}

static int initializing = 1;
/* TODO: Merge the suspend-to-ram with the common code !!!
 * currently, this is a stub implementation for suspend-to-disk
 * only
 */

#ifdef CONFIG_SOFTWARE_SUSPEND

static int pmac_pm_prepare(suspend_state_t state)
{
	printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);

	return 0;
}

static int pmac_pm_enter(suspend_state_t state)
{
	printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);

	/* Giveup the lazy FPU & vec so we don't have to back them
	 * up from the low level code
	 */
	enable_kernel_fp();

#ifdef CONFIG_ALTIVEC
	if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
		enable_kernel_altivec();
#endif /* CONFIG_ALTIVEC */

	return 0;
}

static int pmac_pm_finish(suspend_state_t state)
{
	printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);

	/* Restore userland MMU context */
	set_context(current->active_mm->context, current->active_mm->pgd);

	return 0;
}

static struct pm_ops pmac_pm_ops = {
	.pm_disk_mode	= PM_DISK_SHUTDOWN,
	.prepare	= pmac_pm_prepare,
	.enter		= pmac_pm_enter,
	.finish		= pmac_pm_finish,
};

#endif /* CONFIG_SOFTWARE_SUSPEND */

static int pmac_late_init(void)
{
	initializing = 0;
#ifdef CONFIG_SOFTWARE_SUSPEND
	pm_set_ops(&pmac_pm_ops);
#endif /* CONFIG_SOFTWARE_SUSPEND */
	return 0;
}

late_initcall(pmac_late_init);

/* can't be __init - can be called whenever a disk is first accessed */
void
note_bootable_part(dev_t dev, int part, int goodness)
{
	static int found_boot = 0;
	char *p;

	if (!initializing)
		return;
	if ((goodness <= current_root_goodness) &&
	    ROOT_DEV != DEFAULT_ROOT_DEVICE)
		return;
	p = strstr(saved_command_line, "root=");
	if (p != NULL && (p == saved_command_line || p[-1] == ' '))
		return;

	if (!found_boot) {
		find_boot_device();
		found_boot = 1;
	}
	if (!boot_dev || dev == boot_dev) {
		ROOT_DEV = dev + part;
		boot_dev = 0;
		current_root_goodness = goodness;
	}
}

static void
pmac_restart(char *cmd)
{
#ifdef CONFIG_ADB_CUDA
	struct adb_request req;
#endif /* CONFIG_ADB_CUDA */

	switch (sys_ctrler) {
#ifdef CONFIG_ADB_CUDA
	case SYS_CTRLER_CUDA:
		cuda_request(&req, NULL, 2, CUDA_PACKET,
			     CUDA_RESET_SYSTEM);
		for (;;)
			cuda_poll();
		break;
#endif /* CONFIG_ADB_CUDA */
#ifdef CONFIG_ADB_PMU
	case SYS_CTRLER_PMU:
		pmu_restart();
		break;
#endif /* CONFIG_ADB_PMU */
	default: ;
	}
}

static void
pmac_power_off(void)
{
#ifdef CONFIG_ADB_CUDA
	struct adb_request req;
#endif /* CONFIG_ADB_CUDA */

	switch (sys_ctrler) {
#ifdef CONFIG_ADB_CUDA
	case SYS_CTRLER_CUDA:
		cuda_request(&req, NULL, 2, CUDA_PACKET,
			     CUDA_POWERDOWN);
		for (;;)
			cuda_poll();
		break;
#endif /* CONFIG_ADB_CUDA */
#ifdef CONFIG_ADB_PMU
	case SYS_CTRLER_PMU:
		pmu_shutdown();
		break;
#endif /* CONFIG_ADB_PMU */
	default: ;
	}
}

static void
pmac_halt(void)
{
	pmac_power_off();
}

void __init pmac_init(void)
{
	/* isa_io_base gets set in pmac_find_bridges */
	isa_mem_base = PMAC_ISA_MEM_BASE;
	pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
	ISA_DMA_THRESHOLD = ~0L;
	DMA_MODE_READ = 1;
	DMA_MODE_WRITE = 2;

	ppc_md.setup_arch     = pmac_setup_arch;
	ppc_md.show_cpuinfo   = pmac_show_cpuinfo;
	ppc_md.show_percpuinfo = pmac_show_percpuinfo;
	ppc_md.irq_canonicalize = NULL;
	ppc_md.init_IRQ       = pmac_pic_init;
	ppc_md.get_irq        = pmac_get_irq; /* Changed later on ... */

	ppc_md.pcibios_fixup  = pmac_pcibios_fixup;
	ppc_md.pcibios_enable_device_hook = pmac_pci_enable_device_hook;
	ppc_md.pcibios_after_init = pmac_pcibios_after_init;
	ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;

	ppc_md.restart        = pmac_restart;
	ppc_md.power_off      = pmac_power_off;
	ppc_md.halt           = pmac_halt;

	ppc_md.time_init      = pmac_time_init;
	ppc_md.set_rtc_time   = pmac_set_rtc_time;
	ppc_md.get_rtc_time   = pmac_get_rtc_time;
	ppc_md.calibrate_decr = pmac_calibrate_decr;

	ppc_md.feature_call   = pmac_do_feature_call;

#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
#ifdef CONFIG_BLK_DEV_IDE_PMAC
        ppc_ide_md.ide_init_hwif	= pmac_ide_init_hwif_ports;
        ppc_ide_md.default_io_base	= pmac_ide_get_base;
#endif /* CONFIG_BLK_DEV_IDE_PMAC */
#endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */

#ifdef CONFIG_BOOTX_TEXT
	ppc_md.progress = pmac_progress;
#endif /* CONFIG_BOOTX_TEXT */

	if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);

}

#ifdef CONFIG_BOOTX_TEXT
static void __init
pmac_progress(char *s, unsigned short hex)
{
	if (boot_text_mapped) {
		btext_drawstring(s);
		btext_drawchar('\n');
	}
}
#endif /* CONFIG_BOOTX_TEXT */

static int __init
pmac_declare_of_platform_devices(void)
{
	struct device_node *np;

	np = find_devices("uni-n");
	if (np) {
		for (np = np->child; np != NULL; np = np->sibling)
			if (strncmp(np->name, "i2c", 3) == 0) {
				of_platform_device_create(np, "uni-n-i2c",
							  NULL);
				break;
			}
	}
	np = find_devices("u3");
	if (np) {
		for (np = np->child; np != NULL; np = np->sibling)
			if (strncmp(np->name, "i2c", 3) == 0) {
				of_platform_device_create(np, "u3-i2c",
							  NULL);
				break;
			}
	}

	np = find_devices("valkyrie");
	if (np)
		of_platform_device_create(np, "valkyrie", NULL);
	np = find_devices("platinum");
	if (np)
		of_platform_device_create(np, "platinum", NULL);

	return 0;
}

device_initcall(pmac_declare_of_platform_devices);