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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Powermac setup and early boot code plus other random bits.
4 *
5 * PowerPC version
6 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
7 *
8 * Adapted for Power Macintosh by Paul Mackerras
9 * Copyright (C) 1996 Paul Mackerras (paulus@samba.org)
10 *
11 * Derived from "arch/alpha/kernel/setup.c"
12 * Copyright (C) 1995 Linus Torvalds
13 *
14 * Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
15 */
16
17/*
18 * bootup setup stuff..
19 */
20
21#include <linux/init.h>
22#include <linux/errno.h>
23#include <linux/sched.h>
24#include <linux/kernel.h>
25#include <linux/mm.h>
26#include <linux/stddef.h>
27#include <linux/unistd.h>
28#include <linux/ptrace.h>
29#include <linux/export.h>
30#include <linux/user.h>
31#include <linux/tty.h>
32#include <linux/string.h>
33#include <linux/delay.h>
34#include <linux/ioport.h>
35#include <linux/major.h>
36#include <linux/initrd.h>
37#include <linux/vt_kern.h>
38#include <linux/console.h>
39#include <linux/pci.h>
40#include <linux/adb.h>
41#include <linux/cuda.h>
42#include <linux/pmu.h>
43#include <linux/irq.h>
44#include <linux/seq_file.h>
45#include <linux/root_dev.h>
46#include <linux/bitops.h>
47#include <linux/suspend.h>
48#include <linux/of.h>
49#include <linux/of_platform.h>
50
51#include <asm/reg.h>
52#include <asm/sections.h>
53#include <asm/io.h>
54#include <asm/pci-bridge.h>
55#include <asm/ohare.h>
56#include <asm/mediabay.h>
57#include <asm/machdep.h>
58#include <asm/dma.h>
59#include <asm/cputable.h>
60#include <asm/btext.h>
61#include <asm/pmac_feature.h>
62#include <asm/time.h>
63#include <asm/mmu_context.h>
64#include <asm/iommu.h>
65#include <asm/smu.h>
66#include <asm/pmc.h>
67#include <asm/udbg.h>
68
69#include "pmac.h"
70
71#undef SHOW_GATWICK_IRQS
72
73static int has_l2cache;
74
75int pmac_newworld;
76
77static int current_root_goodness = -1;
78
79/* sda1 - slightly silly choice */
80#define DEFAULT_ROOT_DEVICE MKDEV(SCSI_DISK0_MAJOR, 1)
81
82sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
83EXPORT_SYMBOL(sys_ctrler);
84
85static void pmac_show_cpuinfo(struct seq_file *m)
86{
87 struct device_node *np;
88 const char *pp;
89 int plen;
90 int mbmodel;
91 unsigned int mbflags;
92 char* mbname;
93
94 mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
95 PMAC_MB_INFO_MODEL, 0);
96 mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
97 PMAC_MB_INFO_FLAGS, 0);
98 if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
99 (long) &mbname) != 0)
100 mbname = "Unknown";
101
102 /* find motherboard type */
103 seq_printf(m, "machine\t\t: ");
104 np = of_find_node_by_path("/");
105 if (np != NULL) {
106 pp = of_get_property(np, "model", NULL);
107 if (pp != NULL)
108 seq_printf(m, "%s\n", pp);
109 else
110 seq_printf(m, "PowerMac\n");
111 pp = of_get_property(np, "compatible", &plen);
112 if (pp != NULL) {
113 seq_printf(m, "motherboard\t:");
114 while (plen > 0) {
115 int l = strlen(pp) + 1;
116 seq_printf(m, " %s", pp);
117 plen -= l;
118 pp += l;
119 }
120 seq_printf(m, "\n");
121 }
122 of_node_put(np);
123 } else
124 seq_printf(m, "PowerMac\n");
125
126 /* print parsed model */
127 seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
128 seq_printf(m, "pmac flags\t: %08x\n", mbflags);
129
130 /* find l2 cache info */
131 np = of_find_node_by_name(NULL, "l2-cache");
132 if (np == NULL)
133 np = of_find_node_by_type(NULL, "cache");
134 if (np != NULL) {
135 const unsigned int *ic =
136 of_get_property(np, "i-cache-size", NULL);
137 const unsigned int *dc =
138 of_get_property(np, "d-cache-size", NULL);
139 seq_printf(m, "L2 cache\t:");
140 has_l2cache = 1;
141 if (of_property_read_bool(np, "cache-unified") && dc) {
142 seq_printf(m, " %dK unified", *dc / 1024);
143 } else {
144 if (ic)
145 seq_printf(m, " %dK instruction", *ic / 1024);
146 if (dc)
147 seq_printf(m, "%s %dK data",
148 (ic? " +": ""), *dc / 1024);
149 }
150 pp = of_get_property(np, "ram-type", NULL);
151 if (pp)
152 seq_printf(m, " %s", pp);
153 seq_printf(m, "\n");
154 of_node_put(np);
155 }
156
157 /* Indicate newworld/oldworld */
158 seq_printf(m, "pmac-generation\t: %s\n",
159 pmac_newworld ? "NewWorld" : "OldWorld");
160}
161
162#ifndef CONFIG_ADB_CUDA
163int __init find_via_cuda(void)
164{
165 struct device_node *dn = of_find_node_by_name(NULL, "via-cuda");
166
167 if (!dn)
168 return 0;
169 of_node_put(dn);
170 printk("WARNING ! Your machine is CUDA-based but your kernel\n");
171 printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
172 return 0;
173}
174#endif
175
176#ifndef CONFIG_ADB_PMU
177int __init find_via_pmu(void)
178{
179 struct device_node *dn = of_find_node_by_name(NULL, "via-pmu");
180
181 if (!dn)
182 return 0;
183 of_node_put(dn);
184 printk("WARNING ! Your machine is PMU-based but your kernel\n");
185 printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
186 return 0;
187}
188#endif
189
190#ifndef CONFIG_PMAC_SMU
191int __init smu_init(void)
192{
193 /* should check and warn if SMU is present */
194 return 0;
195}
196#endif
197
198#ifdef CONFIG_PPC32
199static volatile u32 *sysctrl_regs;
200
201static void __init ohare_init(void)
202{
203 struct device_node *dn;
204
205 /* this area has the CPU identification register
206 and some registers used by smp boards */
207 sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
208
209 /*
210 * Turn on the L2 cache.
211 * We assume that we have a PSX memory controller iff
212 * we have an ohare I/O controller.
213 */
214 dn = of_find_node_by_name(NULL, "ohare");
215 if (dn) {
216 of_node_put(dn);
217 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
218 if (sysctrl_regs[4] & 0x10)
219 sysctrl_regs[4] |= 0x04000020;
220 else
221 sysctrl_regs[4] |= 0x04000000;
222 if(has_l2cache)
223 printk(KERN_INFO "Level 2 cache enabled\n");
224 }
225 }
226}
227
228static void __init l2cr_init(void)
229{
230 /* Checks "l2cr-value" property in the registry */
231 if (cpu_has_feature(CPU_FTR_L2CR)) {
232 struct device_node *np;
233
234 for_each_of_cpu_node(np) {
235 const unsigned int *l2cr =
236 of_get_property(np, "l2cr-value", NULL);
237 if (l2cr) {
238 _set_L2CR(0);
239 _set_L2CR(*l2cr);
240 pr_info("L2CR overridden (0x%x), backside cache is %s\n",
241 *l2cr, ((*l2cr) & 0x80000000) ?
242 "enabled" : "disabled");
243 }
244 of_node_put(np);
245 break;
246 }
247 }
248}
249#endif
250
251static void __init pmac_setup_arch(void)
252{
253 struct device_node *cpu, *ic;
254 const int *fp;
255 unsigned long pvr;
256
257 pvr = PVR_VER(mfspr(SPRN_PVR));
258
259 /* Set loops_per_jiffy to a half-way reasonable value,
260 for use until calibrate_delay gets called. */
261 loops_per_jiffy = 50000000 / HZ;
262
263 for_each_of_cpu_node(cpu) {
264 fp = of_get_property(cpu, "clock-frequency", NULL);
265 if (fp != NULL) {
266 if (pvr >= 0x30 && pvr < 0x80)
267 /* PPC970 etc. */
268 loops_per_jiffy = *fp / (3 * HZ);
269 else if (pvr == 4 || pvr >= 8)
270 /* 604, G3, G4 etc. */
271 loops_per_jiffy = *fp / HZ;
272 else
273 /* 603, etc. */
274 loops_per_jiffy = *fp / (2 * HZ);
275 of_node_put(cpu);
276 break;
277 }
278 }
279
280 /* See if newworld or oldworld */
281 ic = of_find_node_with_property(NULL, "interrupt-controller");
282 if (ic) {
283 pmac_newworld = 1;
284 of_node_put(ic);
285 }
286
287#ifdef CONFIG_PPC32
288 ohare_init();
289 l2cr_init();
290#endif /* CONFIG_PPC32 */
291
292 find_via_cuda();
293 find_via_pmu();
294 smu_init();
295
296#if IS_ENABLED(CONFIG_NVRAM)
297 pmac_nvram_init();
298#endif
299#ifdef CONFIG_PPC32
300#ifdef CONFIG_BLK_DEV_INITRD
301 if (initrd_start)
302 ROOT_DEV = Root_RAM0;
303 else
304#endif
305 ROOT_DEV = DEFAULT_ROOT_DEVICE;
306#endif
307
308#ifdef CONFIG_ADB
309 if (strstr(boot_command_line, "adb_sync")) {
310 extern int __adb_probe_sync;
311 __adb_probe_sync = 1;
312 }
313#endif /* CONFIG_ADB */
314}
315
316static int initializing = 1;
317
318static int pmac_late_init(void)
319{
320 initializing = 0;
321 return 0;
322}
323machine_late_initcall(powermac, pmac_late_init);
324
325void note_bootable_part(dev_t dev, int part, int goodness);
326/*
327 * This is __ref because we check for "initializing" before
328 * touching any of the __init sensitive things and "initializing"
329 * will be false after __init time. This can't be __init because it
330 * can be called whenever a disk is first accessed.
331 */
332void __ref note_bootable_part(dev_t dev, int part, int goodness)
333{
334 char *p;
335
336 if (!initializing)
337 return;
338 if ((goodness <= current_root_goodness) &&
339 ROOT_DEV != DEFAULT_ROOT_DEVICE)
340 return;
341 p = strstr(boot_command_line, "root=");
342 if (p != NULL && (p == boot_command_line || p[-1] == ' '))
343 return;
344
345 ROOT_DEV = dev + part;
346 current_root_goodness = goodness;
347}
348
349#ifdef CONFIG_ADB_CUDA
350static void __noreturn cuda_restart(void)
351{
352 struct adb_request req;
353
354 cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
355 for (;;)
356 cuda_poll();
357}
358
359static void __noreturn cuda_shutdown(void)
360{
361 struct adb_request req;
362
363 cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
364 for (;;)
365 cuda_poll();
366}
367
368#else
369#define cuda_restart()
370#define cuda_shutdown()
371#endif
372
373#ifndef CONFIG_ADB_PMU
374#define pmu_restart()
375#define pmu_shutdown()
376#endif
377
378#ifndef CONFIG_PMAC_SMU
379#define smu_restart()
380#define smu_shutdown()
381#endif
382
383static void __noreturn pmac_restart(char *cmd)
384{
385 switch (sys_ctrler) {
386 case SYS_CTRLER_CUDA:
387 cuda_restart();
388 break;
389 case SYS_CTRLER_PMU:
390 pmu_restart();
391 break;
392 case SYS_CTRLER_SMU:
393 smu_restart();
394 break;
395 default: ;
396 }
397 while (1) ;
398}
399
400static void __noreturn pmac_power_off(void)
401{
402 switch (sys_ctrler) {
403 case SYS_CTRLER_CUDA:
404 cuda_shutdown();
405 break;
406 case SYS_CTRLER_PMU:
407 pmu_shutdown();
408 break;
409 case SYS_CTRLER_SMU:
410 smu_shutdown();
411 break;
412 default: ;
413 }
414 while (1) ;
415}
416
417static void __noreturn
418pmac_halt(void)
419{
420 pmac_power_off();
421}
422
423/*
424 * Early initialization.
425 */
426static void __init pmac_init(void)
427{
428 /* Enable early btext debug if requested */
429 if (strstr(boot_command_line, "btextdbg")) {
430 udbg_adb_init_early();
431 register_early_udbg_console();
432 }
433
434 /* Probe motherboard chipset */
435 pmac_feature_init();
436
437 /* Initialize debug stuff */
438 udbg_scc_init(!!strstr(boot_command_line, "sccdbg"));
439 udbg_adb_init(!!strstr(boot_command_line, "btextdbg"));
440
441#ifdef CONFIG_PPC64
442 iommu_init_early_dart(&pmac_pci_controller_ops);
443#endif
444
445 /* SMP Init has to be done early as we need to patch up
446 * cpu_possible_mask before interrupt stacks are allocated
447 * or kaboom...
448 */
449#ifdef CONFIG_SMP
450 pmac_setup_smp();
451#endif
452}
453
454static int __init pmac_declare_of_platform_devices(void)
455{
456 struct device_node *np;
457
458 np = of_find_node_by_name(NULL, "valkyrie");
459 if (np) {
460 of_platform_device_create(np, "valkyrie", NULL);
461 of_node_put(np);
462 }
463 np = of_find_node_by_name(NULL, "platinum");
464 if (np) {
465 of_platform_device_create(np, "platinum", NULL);
466 of_node_put(np);
467 }
468 np = of_find_node_by_type(NULL, "smu");
469 if (np) {
470 of_platform_device_create(np, "smu", NULL);
471 of_node_put(np);
472 }
473 np = of_find_node_by_type(NULL, "fcu");
474 if (np == NULL) {
475 /* Some machines have strangely broken device-tree */
476 np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e");
477 }
478 if (np) {
479 of_platform_device_create(np, "temperature", NULL);
480 of_node_put(np);
481 }
482
483 return 0;
484}
485machine_device_initcall(powermac, pmac_declare_of_platform_devices);
486
487#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
488/*
489 * This is called very early, as part of console_init() (typically just after
490 * time_init()). This function is respondible for trying to find a good
491 * default console on serial ports. It tries to match the open firmware
492 * default output with one of the available serial console drivers.
493 */
494static int __init check_pmac_serial_console(void)
495{
496 struct device_node *prom_stdout = NULL;
497 int offset = 0;
498 const char *name;
499#ifdef CONFIG_SERIAL_PMACZILOG_TTYS
500 char *devname = "ttyS";
501#else
502 char *devname = "ttyPZ";
503#endif
504
505 pr_debug(" -> check_pmac_serial_console()\n");
506
507 /* The user has requested a console so this is already set up. */
508 if (strstr(boot_command_line, "console=")) {
509 pr_debug(" console was specified !\n");
510 return -EBUSY;
511 }
512
513 if (!of_chosen) {
514 pr_debug(" of_chosen is NULL !\n");
515 return -ENODEV;
516 }
517
518 /* We are getting a weird phandle from OF ... */
519 /* ... So use the full path instead */
520 name = of_get_property(of_chosen, "linux,stdout-path", NULL);
521 if (name == NULL) {
522 pr_debug(" no linux,stdout-path !\n");
523 return -ENODEV;
524 }
525 prom_stdout = of_find_node_by_path(name);
526 if (!prom_stdout) {
527 pr_debug(" can't find stdout package %s !\n", name);
528 return -ENODEV;
529 }
530 pr_debug("stdout is %pOF\n", prom_stdout);
531
532 if (of_node_name_eq(prom_stdout, "ch-a"))
533 offset = 0;
534 else if (of_node_name_eq(prom_stdout, "ch-b"))
535 offset = 1;
536 else
537 goto not_found;
538 of_node_put(prom_stdout);
539
540 pr_debug("Found serial console at %s%d\n", devname, offset);
541
542 return add_preferred_console(devname, offset, NULL);
543
544 not_found:
545 pr_debug("No preferred console found !\n");
546 of_node_put(prom_stdout);
547 return -ENODEV;
548}
549console_initcall(check_pmac_serial_console);
550
551#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
552
553/*
554 * Called very early, MMU is off, device-tree isn't unflattened
555 */
556static int __init pmac_probe(void)
557{
558 if (!of_machine_is_compatible("Power Macintosh") &&
559 !of_machine_is_compatible("MacRISC"))
560 return 0;
561
562#ifdef CONFIG_PPC32
563 /* isa_io_base gets set in pmac_pci_init */
564 DMA_MODE_READ = 1;
565 DMA_MODE_WRITE = 2;
566#endif /* CONFIG_PPC32 */
567
568 pm_power_off = pmac_power_off;
569
570 pmac_init();
571
572 return 1;
573}
574
575define_machine(powermac) {
576 .name = "PowerMac",
577 .probe = pmac_probe,
578 .setup_arch = pmac_setup_arch,
579 .discover_phbs = pmac_pci_init,
580 .show_cpuinfo = pmac_show_cpuinfo,
581 .init_IRQ = pmac_pic_init,
582 .get_irq = NULL, /* changed later */
583 .pci_irq_fixup = pmac_pci_irq_fixup,
584 .restart = pmac_restart,
585 .halt = pmac_halt,
586 .time_init = pmac_time_init,
587 .get_boot_time = pmac_get_boot_time,
588 .set_rtc_time = pmac_set_rtc_time,
589 .get_rtc_time = pmac_get_rtc_time,
590 .calibrate_decr = pmac_calibrate_decr,
591 .feature_call = pmac_do_feature_call,
592 .progress = udbg_progress,
593#ifdef CONFIG_PPC64
594 .power_save = power4_idle,
595 .enable_pmcs = power4_enable_pmcs,
596#endif /* CONFIG_PPC64 */
597#ifdef CONFIG_PPC32
598 .pcibios_after_init = pmac_pcibios_after_init,
599 .phys_mem_access_prot = pci_phys_mem_access_prot,
600#endif
601};
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/init.h>
27#include <linux/errno.h>
28#include <linux/sched.h>
29#include <linux/kernel.h>
30#include <linux/mm.h>
31#include <linux/stddef.h>
32#include <linux/unistd.h>
33#include <linux/ptrace.h>
34#include <linux/user.h>
35#include <linux/tty.h>
36#include <linux/string.h>
37#include <linux/delay.h>
38#include <linux/ioport.h>
39#include <linux/major.h>
40#include <linux/initrd.h>
41#include <linux/vt_kern.h>
42#include <linux/console.h>
43#include <linux/pci.h>
44#include <linux/adb.h>
45#include <linux/cuda.h>
46#include <linux/pmu.h>
47#include <linux/irq.h>
48#include <linux/seq_file.h>
49#include <linux/root_dev.h>
50#include <linux/bitops.h>
51#include <linux/suspend.h>
52#include <linux/of_device.h>
53#include <linux/of_platform.h>
54#include <linux/memblock.h>
55
56#include <asm/reg.h>
57#include <asm/sections.h>
58#include <asm/prom.h>
59#include <asm/system.h>
60#include <asm/pgtable.h>
61#include <asm/io.h>
62#include <asm/pci-bridge.h>
63#include <asm/ohare.h>
64#include <asm/mediabay.h>
65#include <asm/machdep.h>
66#include <asm/dma.h>
67#include <asm/cputable.h>
68#include <asm/btext.h>
69#include <asm/pmac_feature.h>
70#include <asm/time.h>
71#include <asm/mmu_context.h>
72#include <asm/iommu.h>
73#include <asm/smu.h>
74#include <asm/pmc.h>
75#include <asm/udbg.h>
76
77#include "pmac.h"
78
79#undef SHOW_GATWICK_IRQS
80
81int ppc_override_l2cr = 0;
82int ppc_override_l2cr_value;
83int has_l2cache = 0;
84
85int pmac_newworld;
86
87static int current_root_goodness = -1;
88
89extern struct machdep_calls pmac_md;
90
91#define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
92
93#ifdef CONFIG_PPC64
94int sccdbg;
95#endif
96
97sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
98EXPORT_SYMBOL(sys_ctrler);
99
100#ifdef CONFIG_PMAC_SMU
101unsigned long smu_cmdbuf_abs;
102EXPORT_SYMBOL(smu_cmdbuf_abs);
103#endif
104
105static void pmac_show_cpuinfo(struct seq_file *m)
106{
107 struct device_node *np;
108 const char *pp;
109 int plen;
110 int mbmodel;
111 unsigned int mbflags;
112 char* mbname;
113
114 mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
115 PMAC_MB_INFO_MODEL, 0);
116 mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
117 PMAC_MB_INFO_FLAGS, 0);
118 if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
119 (long) &mbname) != 0)
120 mbname = "Unknown";
121
122 /* find motherboard type */
123 seq_printf(m, "machine\t\t: ");
124 np = of_find_node_by_path("/");
125 if (np != NULL) {
126 pp = of_get_property(np, "model", NULL);
127 if (pp != NULL)
128 seq_printf(m, "%s\n", pp);
129 else
130 seq_printf(m, "PowerMac\n");
131 pp = of_get_property(np, "compatible", &plen);
132 if (pp != NULL) {
133 seq_printf(m, "motherboard\t:");
134 while (plen > 0) {
135 int l = strlen(pp) + 1;
136 seq_printf(m, " %s", pp);
137 plen -= l;
138 pp += l;
139 }
140 seq_printf(m, "\n");
141 }
142 of_node_put(np);
143 } else
144 seq_printf(m, "PowerMac\n");
145
146 /* print parsed model */
147 seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
148 seq_printf(m, "pmac flags\t: %08x\n", mbflags);
149
150 /* find l2 cache info */
151 np = of_find_node_by_name(NULL, "l2-cache");
152 if (np == NULL)
153 np = of_find_node_by_type(NULL, "cache");
154 if (np != NULL) {
155 const unsigned int *ic =
156 of_get_property(np, "i-cache-size", NULL);
157 const unsigned int *dc =
158 of_get_property(np, "d-cache-size", NULL);
159 seq_printf(m, "L2 cache\t:");
160 has_l2cache = 1;
161 if (of_get_property(np, "cache-unified", NULL) != 0 && dc) {
162 seq_printf(m, " %dK unified", *dc / 1024);
163 } else {
164 if (ic)
165 seq_printf(m, " %dK instruction", *ic / 1024);
166 if (dc)
167 seq_printf(m, "%s %dK data",
168 (ic? " +": ""), *dc / 1024);
169 }
170 pp = of_get_property(np, "ram-type", NULL);
171 if (pp)
172 seq_printf(m, " %s", pp);
173 seq_printf(m, "\n");
174 of_node_put(np);
175 }
176
177 /* Indicate newworld/oldworld */
178 seq_printf(m, "pmac-generation\t: %s\n",
179 pmac_newworld ? "NewWorld" : "OldWorld");
180}
181
182#ifndef CONFIG_ADB_CUDA
183int find_via_cuda(void)
184{
185 struct device_node *dn = of_find_node_by_name(NULL, "via-cuda");
186
187 if (!dn)
188 return 0;
189 of_node_put(dn);
190 printk("WARNING ! Your machine is CUDA-based but your kernel\n");
191 printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
192 return 0;
193}
194#endif
195
196#ifndef CONFIG_ADB_PMU
197int find_via_pmu(void)
198{
199 struct device_node *dn = of_find_node_by_name(NULL, "via-pmu");
200
201 if (!dn)
202 return 0;
203 of_node_put(dn);
204 printk("WARNING ! Your machine is PMU-based but your kernel\n");
205 printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
206 return 0;
207}
208#endif
209
210#ifndef CONFIG_PMAC_SMU
211int smu_init(void)
212{
213 /* should check and warn if SMU is present */
214 return 0;
215}
216#endif
217
218#ifdef CONFIG_PPC32
219static volatile u32 *sysctrl_regs;
220
221static void __init ohare_init(void)
222{
223 struct device_node *dn;
224
225 /* this area has the CPU identification register
226 and some registers used by smp boards */
227 sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
228
229 /*
230 * Turn on the L2 cache.
231 * We assume that we have a PSX memory controller iff
232 * we have an ohare I/O controller.
233 */
234 dn = of_find_node_by_name(NULL, "ohare");
235 if (dn) {
236 of_node_put(dn);
237 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
238 if (sysctrl_regs[4] & 0x10)
239 sysctrl_regs[4] |= 0x04000020;
240 else
241 sysctrl_regs[4] |= 0x04000000;
242 if(has_l2cache)
243 printk(KERN_INFO "Level 2 cache enabled\n");
244 }
245 }
246}
247
248static void __init l2cr_init(void)
249{
250 /* Checks "l2cr-value" property in the registry */
251 if (cpu_has_feature(CPU_FTR_L2CR)) {
252 struct device_node *np = of_find_node_by_name(NULL, "cpus");
253 if (np == 0)
254 np = of_find_node_by_type(NULL, "cpu");
255 if (np != 0) {
256 const unsigned int *l2cr =
257 of_get_property(np, "l2cr-value", NULL);
258 if (l2cr != 0) {
259 ppc_override_l2cr = 1;
260 ppc_override_l2cr_value = *l2cr;
261 _set_L2CR(0);
262 _set_L2CR(ppc_override_l2cr_value);
263 }
264 of_node_put(np);
265 }
266 }
267
268 if (ppc_override_l2cr)
269 printk(KERN_INFO "L2CR overridden (0x%x), "
270 "backside cache is %s\n",
271 ppc_override_l2cr_value,
272 (ppc_override_l2cr_value & 0x80000000)
273 ? "enabled" : "disabled");
274}
275#endif
276
277static void __init pmac_setup_arch(void)
278{
279 struct device_node *cpu, *ic;
280 const int *fp;
281 unsigned long pvr;
282
283 pvr = PVR_VER(mfspr(SPRN_PVR));
284
285 /* Set loops_per_jiffy to a half-way reasonable value,
286 for use until calibrate_delay gets called. */
287 loops_per_jiffy = 50000000 / HZ;
288 cpu = of_find_node_by_type(NULL, "cpu");
289 if (cpu != NULL) {
290 fp = of_get_property(cpu, "clock-frequency", NULL);
291 if (fp != NULL) {
292 if (pvr >= 0x30 && pvr < 0x80)
293 /* PPC970 etc. */
294 loops_per_jiffy = *fp / (3 * HZ);
295 else if (pvr == 4 || pvr >= 8)
296 /* 604, G3, G4 etc. */
297 loops_per_jiffy = *fp / HZ;
298 else
299 /* 601, 603, etc. */
300 loops_per_jiffy = *fp / (2 * HZ);
301 }
302 of_node_put(cpu);
303 }
304
305 /* See if newworld or oldworld */
306 ic = of_find_node_with_property(NULL, "interrupt-controller");
307 if (ic) {
308 pmac_newworld = 1;
309 of_node_put(ic);
310 }
311
312 /* Lookup PCI hosts */
313 pmac_pci_init();
314
315#ifdef CONFIG_PPC32
316 ohare_init();
317 l2cr_init();
318#endif /* CONFIG_PPC32 */
319
320 find_via_cuda();
321 find_via_pmu();
322 smu_init();
323
324#if defined(CONFIG_NVRAM) || defined(CONFIG_NVRAM_MODULE) || \
325 defined(CONFIG_PPC64)
326 pmac_nvram_init();
327#endif
328
329#ifdef CONFIG_PPC32
330#ifdef CONFIG_BLK_DEV_INITRD
331 if (initrd_start)
332 ROOT_DEV = Root_RAM0;
333 else
334#endif
335 ROOT_DEV = DEFAULT_ROOT_DEVICE;
336#endif
337
338#ifdef CONFIG_ADB
339 if (strstr(cmd_line, "adb_sync")) {
340 extern int __adb_probe_sync;
341 __adb_probe_sync = 1;
342 }
343#endif /* CONFIG_ADB */
344}
345
346#ifdef CONFIG_SCSI
347void note_scsi_host(struct device_node *node, void *host)
348{
349}
350EXPORT_SYMBOL(note_scsi_host);
351#endif
352
353static int initializing = 1;
354
355static int pmac_late_init(void)
356{
357 initializing = 0;
358 return 0;
359}
360machine_late_initcall(powermac, pmac_late_init);
361
362/*
363 * This is __init_refok because we check for "initializing" before
364 * touching any of the __init sensitive things and "initializing"
365 * will be false after __init time. This can't be __init because it
366 * can be called whenever a disk is first accessed.
367 */
368void __init_refok note_bootable_part(dev_t dev, int part, int goodness)
369{
370 char *p;
371
372 if (!initializing)
373 return;
374 if ((goodness <= current_root_goodness) &&
375 ROOT_DEV != DEFAULT_ROOT_DEVICE)
376 return;
377 p = strstr(boot_command_line, "root=");
378 if (p != NULL && (p == boot_command_line || p[-1] == ' '))
379 return;
380
381 ROOT_DEV = dev + part;
382 current_root_goodness = goodness;
383}
384
385#ifdef CONFIG_ADB_CUDA
386static void cuda_restart(void)
387{
388 struct adb_request req;
389
390 cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
391 for (;;)
392 cuda_poll();
393}
394
395static void cuda_shutdown(void)
396{
397 struct adb_request req;
398
399 cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
400 for (;;)
401 cuda_poll();
402}
403
404#else
405#define cuda_restart()
406#define cuda_shutdown()
407#endif
408
409#ifndef CONFIG_ADB_PMU
410#define pmu_restart()
411#define pmu_shutdown()
412#endif
413
414#ifndef CONFIG_PMAC_SMU
415#define smu_restart()
416#define smu_shutdown()
417#endif
418
419static void pmac_restart(char *cmd)
420{
421 switch (sys_ctrler) {
422 case SYS_CTRLER_CUDA:
423 cuda_restart();
424 break;
425 case SYS_CTRLER_PMU:
426 pmu_restart();
427 break;
428 case SYS_CTRLER_SMU:
429 smu_restart();
430 break;
431 default: ;
432 }
433}
434
435static void pmac_power_off(void)
436{
437 switch (sys_ctrler) {
438 case SYS_CTRLER_CUDA:
439 cuda_shutdown();
440 break;
441 case SYS_CTRLER_PMU:
442 pmu_shutdown();
443 break;
444 case SYS_CTRLER_SMU:
445 smu_shutdown();
446 break;
447 default: ;
448 }
449}
450
451static void
452pmac_halt(void)
453{
454 pmac_power_off();
455}
456
457/*
458 * Early initialization.
459 */
460static void __init pmac_init_early(void)
461{
462 /* Enable early btext debug if requested */
463 if (strstr(cmd_line, "btextdbg")) {
464 udbg_adb_init_early();
465 register_early_udbg_console();
466 }
467
468 /* Probe motherboard chipset */
469 pmac_feature_init();
470
471 /* Initialize debug stuff */
472 udbg_scc_init(!!strstr(cmd_line, "sccdbg"));
473 udbg_adb_init(!!strstr(cmd_line, "btextdbg"));
474
475#ifdef CONFIG_PPC64
476 iommu_init_early_dart();
477#endif
478
479 /* SMP Init has to be done early as we need to patch up
480 * cpu_possible_mask before interrupt stacks are allocated
481 * or kaboom...
482 */
483#ifdef CONFIG_SMP
484 pmac_setup_smp();
485#endif
486}
487
488static int __init pmac_declare_of_platform_devices(void)
489{
490 struct device_node *np;
491
492 if (machine_is(chrp))
493 return -1;
494
495 np = of_find_node_by_name(NULL, "valkyrie");
496 if (np)
497 of_platform_device_create(np, "valkyrie", NULL);
498 np = of_find_node_by_name(NULL, "platinum");
499 if (np)
500 of_platform_device_create(np, "platinum", NULL);
501 np = of_find_node_by_type(NULL, "smu");
502 if (np) {
503 of_platform_device_create(np, "smu", NULL);
504 of_node_put(np);
505 }
506 np = of_find_node_by_type(NULL, "fcu");
507 if (np == NULL) {
508 /* Some machines have strangely broken device-tree */
509 np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e");
510 }
511 if (np) {
512 of_platform_device_create(np, "temperature", NULL);
513 of_node_put(np);
514 }
515
516 return 0;
517}
518machine_device_initcall(powermac, pmac_declare_of_platform_devices);
519
520#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
521/*
522 * This is called very early, as part of console_init() (typically just after
523 * time_init()). This function is respondible for trying to find a good
524 * default console on serial ports. It tries to match the open firmware
525 * default output with one of the available serial console drivers.
526 */
527static int __init check_pmac_serial_console(void)
528{
529 struct device_node *prom_stdout = NULL;
530 int offset = 0;
531 const char *name;
532#ifdef CONFIG_SERIAL_PMACZILOG_TTYS
533 char *devname = "ttyS";
534#else
535 char *devname = "ttyPZ";
536#endif
537
538 pr_debug(" -> check_pmac_serial_console()\n");
539
540 /* The user has requested a console so this is already set up. */
541 if (strstr(boot_command_line, "console=")) {
542 pr_debug(" console was specified !\n");
543 return -EBUSY;
544 }
545
546 if (!of_chosen) {
547 pr_debug(" of_chosen is NULL !\n");
548 return -ENODEV;
549 }
550
551 /* We are getting a weird phandle from OF ... */
552 /* ... So use the full path instead */
553 name = of_get_property(of_chosen, "linux,stdout-path", NULL);
554 if (name == NULL) {
555 pr_debug(" no linux,stdout-path !\n");
556 return -ENODEV;
557 }
558 prom_stdout = of_find_node_by_path(name);
559 if (!prom_stdout) {
560 pr_debug(" can't find stdout package %s !\n", name);
561 return -ENODEV;
562 }
563 pr_debug("stdout is %s\n", prom_stdout->full_name);
564
565 name = of_get_property(prom_stdout, "name", NULL);
566 if (!name) {
567 pr_debug(" stdout package has no name !\n");
568 goto not_found;
569 }
570
571 if (strcmp(name, "ch-a") == 0)
572 offset = 0;
573 else if (strcmp(name, "ch-b") == 0)
574 offset = 1;
575 else
576 goto not_found;
577 of_node_put(prom_stdout);
578
579 pr_debug("Found serial console at %s%d\n", devname, offset);
580
581 return add_preferred_console(devname, offset, NULL);
582
583 not_found:
584 pr_debug("No preferred console found !\n");
585 of_node_put(prom_stdout);
586 return -ENODEV;
587}
588console_initcall(check_pmac_serial_console);
589
590#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
591
592/*
593 * Called very early, MMU is off, device-tree isn't unflattened
594 */
595static int __init pmac_probe(void)
596{
597 unsigned long root = of_get_flat_dt_root();
598
599 if (!of_flat_dt_is_compatible(root, "Power Macintosh") &&
600 !of_flat_dt_is_compatible(root, "MacRISC"))
601 return 0;
602
603#ifdef CONFIG_PPC64
604 /*
605 * On U3, the DART (iommu) must be allocated now since it
606 * has an impact on htab_initialize (due to the large page it
607 * occupies having to be broken up so the DART itself is not
608 * part of the cacheable linar mapping
609 */
610 alloc_dart_table();
611
612 hpte_init_native();
613#endif
614
615#ifdef CONFIG_PPC32
616 /* isa_io_base gets set in pmac_pci_init */
617 ISA_DMA_THRESHOLD = ~0L;
618 DMA_MODE_READ = 1;
619 DMA_MODE_WRITE = 2;
620#endif /* CONFIG_PPC32 */
621
622#ifdef CONFIG_PMAC_SMU
623 /*
624 * SMU based G5s need some memory below 2Gb, at least the current
625 * driver needs that. We have to allocate it now. We allocate 4k
626 * (1 small page) for now.
627 */
628 smu_cmdbuf_abs = memblock_alloc_base(4096, 4096, 0x80000000UL);
629#endif /* CONFIG_PMAC_SMU */
630
631 return 1;
632}
633
634#ifdef CONFIG_PPC64
635/* Move that to pci.c */
636static int pmac_pci_probe_mode(struct pci_bus *bus)
637{
638 struct device_node *node = pci_bus_to_OF_node(bus);
639
640 /* We need to use normal PCI probing for the AGP bus,
641 * since the device for the AGP bridge isn't in the tree.
642 * Same for the PCIe host on U4 and the HT host bridge.
643 */
644 if (bus->self == NULL && (of_device_is_compatible(node, "u3-agp") ||
645 of_device_is_compatible(node, "u4-pcie") ||
646 of_device_is_compatible(node, "u3-ht")))
647 return PCI_PROBE_NORMAL;
648 return PCI_PROBE_DEVTREE;
649}
650#endif /* CONFIG_PPC64 */
651
652define_machine(powermac) {
653 .name = "PowerMac",
654 .probe = pmac_probe,
655 .setup_arch = pmac_setup_arch,
656 .init_early = pmac_init_early,
657 .show_cpuinfo = pmac_show_cpuinfo,
658 .init_IRQ = pmac_pic_init,
659 .get_irq = NULL, /* changed later */
660 .pci_irq_fixup = pmac_pci_irq_fixup,
661 .restart = pmac_restart,
662 .power_off = pmac_power_off,
663 .halt = pmac_halt,
664 .time_init = pmac_time_init,
665 .get_boot_time = pmac_get_boot_time,
666 .set_rtc_time = pmac_set_rtc_time,
667 .get_rtc_time = pmac_get_rtc_time,
668 .calibrate_decr = pmac_calibrate_decr,
669 .feature_call = pmac_do_feature_call,
670 .progress = udbg_progress,
671#ifdef CONFIG_PPC64
672 .pci_probe_mode = pmac_pci_probe_mode,
673 .power_save = power4_idle,
674 .enable_pmcs = power4_enable_pmcs,
675#endif /* CONFIG_PPC64 */
676#ifdef CONFIG_PPC32
677 .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
678 .pcibios_after_init = pmac_pcibios_after_init,
679 .phys_mem_access_prot = pci_phys_mem_access_prot,
680#endif
681};