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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_device.h>
49#include <linux/of_platform.h>
50
51#include <asm/reg.h>
52#include <asm/sections.h>
53#include <asm/prom.h>
54#include <asm/io.h>
55#include <asm/pci-bridge.h>
56#include <asm/ohare.h>
57#include <asm/mediabay.h>
58#include <asm/machdep.h>
59#include <asm/dma.h>
60#include <asm/cputable.h>
61#include <asm/btext.h>
62#include <asm/pmac_feature.h>
63#include <asm/time.h>
64#include <asm/mmu_context.h>
65#include <asm/iommu.h>
66#include <asm/smu.h>
67#include <asm/pmc.h>
68#include <asm/udbg.h>
69
70#include "pmac.h"
71
72#undef SHOW_GATWICK_IRQS
73
74int ppc_override_l2cr = 0;
75int ppc_override_l2cr_value;
76int has_l2cache = 0;
77
78int pmac_newworld;
79
80static int current_root_goodness = -1;
81
82extern struct machdep_calls pmac_md;
83
84#define DEFAULT_ROOT_DEVICE Root_SDA1
85
86#ifdef CONFIG_PPC64
87int sccdbg;
88#endif
89
90sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
91EXPORT_SYMBOL(sys_ctrler);
92
93static void pmac_show_cpuinfo(struct seq_file *m)
94{
95 struct device_node *np;
96 const char *pp;
97 int plen;
98 int mbmodel;
99 unsigned int mbflags;
100 char* mbname;
101
102 mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
103 PMAC_MB_INFO_MODEL, 0);
104 mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
105 PMAC_MB_INFO_FLAGS, 0);
106 if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
107 (long) &mbname) != 0)
108 mbname = "Unknown";
109
110
111 seq_printf(m, "machine\t\t: ");
112 np = of_find_node_by_path("/");
113 if (np != NULL) {
114 pp = of_get_property(np, "model", NULL);
115 if (pp != NULL)
116 seq_printf(m, "%s\n", pp);
117 else
118 seq_printf(m, "PowerMac\n");
119 pp = of_get_property(np, "compatible", &plen);
120 if (pp != NULL) {
121 seq_printf(m, "motherboard\t:");
122 while (plen > 0) {
123 int l = strlen(pp) + 1;
124 seq_printf(m, " %s", pp);
125 plen -= l;
126 pp += l;
127 }
128 seq_printf(m, "\n");
129 }
130 of_node_put(np);
131 } else
132 seq_printf(m, "PowerMac\n");
133
134
135 seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
136 seq_printf(m, "pmac flags\t: %08x\n", mbflags);
137
138
139 np = of_find_node_by_name(NULL, "l2-cache");
140 if (np == NULL)
141 np = of_find_node_by_type(NULL, "cache");
142 if (np != NULL) {
143 const unsigned int *ic =
144 of_get_property(np, "i-cache-size", NULL);
145 const unsigned int *dc =
146 of_get_property(np, "d-cache-size", NULL);
147 seq_printf(m, "L2 cache\t:");
148 has_l2cache = 1;
149 if (of_get_property(np, "cache-unified", NULL) && dc) {
150 seq_printf(m, " %dK unified", *dc / 1024);
151 } else {
152 if (ic)
153 seq_printf(m, " %dK instruction", *ic / 1024);
154 if (dc)
155 seq_printf(m, "%s %dK data",
156 (ic? " +": ""), *dc / 1024);
157 }
158 pp = of_get_property(np, "ram-type", NULL);
159 if (pp)
160 seq_printf(m, " %s", pp);
161 seq_printf(m, "\n");
162 of_node_put(np);
163 }
164
165
166 seq_printf(m, "pmac-generation\t: %s\n",
167 pmac_newworld ? "NewWorld" : "OldWorld");
168}
169
170#ifndef CONFIG_ADB_CUDA
171int find_via_cuda(void)
172{
173 struct device_node *dn = of_find_node_by_name(NULL, "via-cuda");
174
175 if (!dn)
176 return 0;
177 of_node_put(dn);
178 printk("WARNING ! Your machine is CUDA-based but your kernel\n");
179 printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
180 return 0;
181}
182#endif
183
184#ifndef CONFIG_ADB_PMU
185int find_via_pmu(void)
186{
187 struct device_node *dn = of_find_node_by_name(NULL, "via-pmu");
188
189 if (!dn)
190 return 0;
191 of_node_put(dn);
192 printk("WARNING ! Your machine is PMU-based but your kernel\n");
193 printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
194 return 0;
195}
196#endif
197
198#ifndef CONFIG_PMAC_SMU
199int smu_init(void)
200{
201
202 return 0;
203}
204#endif
205
206#ifdef CONFIG_PPC32
207static volatile u32 *sysctrl_regs;
208
209static void __init ohare_init(void)
210{
211 struct device_node *dn;
212
213
214
215 sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
216
217
218
219
220
221
222 dn = of_find_node_by_name(NULL, "ohare");
223 if (dn) {
224 of_node_put(dn);
225 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
226 if (sysctrl_regs[4] & 0x10)
227 sysctrl_regs[4] |= 0x04000020;
228 else
229 sysctrl_regs[4] |= 0x04000000;
230 if(has_l2cache)
231 printk(KERN_INFO "Level 2 cache enabled\n");
232 }
233 }
234}
235
236static void __init l2cr_init(void)
237{
238
239 if (cpu_has_feature(CPU_FTR_L2CR)) {
240 struct device_node *np;
241
242 for_each_of_cpu_node(np) {
243 const unsigned int *l2cr =
244 of_get_property(np, "l2cr-value", NULL);
245 if (l2cr) {
246 ppc_override_l2cr = 1;
247 ppc_override_l2cr_value = *l2cr;
248 _set_L2CR(0);
249 _set_L2CR(ppc_override_l2cr_value);
250 }
251 of_node_put(np);
252 break;
253 }
254 }
255
256 if (ppc_override_l2cr)
257 printk(KERN_INFO "L2CR overridden (0x%x), "
258 "backside cache is %s\n",
259 ppc_override_l2cr_value,
260 (ppc_override_l2cr_value & 0x80000000)
261 ? "enabled" : "disabled");
262}
263#endif
264
265static void __init pmac_setup_arch(void)
266{
267 struct device_node *cpu, *ic;
268 const int *fp;
269 unsigned long pvr;
270
271 pvr = PVR_VER(mfspr(SPRN_PVR));
272
273
274
275 loops_per_jiffy = 50000000 / HZ;
276
277 for_each_of_cpu_node(cpu) {
278 fp = of_get_property(cpu, "clock-frequency", NULL);
279 if (fp != NULL) {
280 if (pvr >= 0x30 && pvr < 0x80)
281
282 loops_per_jiffy = *fp / (3 * HZ);
283 else if (pvr == 4 || pvr >= 8)
284
285 loops_per_jiffy = *fp / HZ;
286 else
287
288 loops_per_jiffy = *fp / (2 * HZ);
289 of_node_put(cpu);
290 break;
291 }
292 }
293
294
295 ic = of_find_node_with_property(NULL, "interrupt-controller");
296 if (ic) {
297 pmac_newworld = 1;
298 of_node_put(ic);
299 }
300
301#ifdef CONFIG_PPC32
302 ohare_init();
303 l2cr_init();
304#endif
305
306 find_via_cuda();
307 find_via_pmu();
308 smu_init();
309
310#if IS_ENABLED(CONFIG_NVRAM)
311 pmac_nvram_init();
312#endif
313#ifdef CONFIG_PPC32
314#ifdef CONFIG_BLK_DEV_INITRD
315 if (initrd_start)
316 ROOT_DEV = Root_RAM0;
317 else
318#endif
319 ROOT_DEV = DEFAULT_ROOT_DEVICE;
320#endif
321
322#ifdef CONFIG_ADB
323 if (strstr(boot_command_line, "adb_sync")) {
324 extern int __adb_probe_sync;
325 __adb_probe_sync = 1;
326 }
327#endif
328}
329
330#ifdef CONFIG_SCSI
331void note_scsi_host(struct device_node *node, void *host)
332{
333}
334EXPORT_SYMBOL(note_scsi_host);
335#endif
336
337static int initializing = 1;
338
339static int pmac_late_init(void)
340{
341 initializing = 0;
342 return 0;
343}
344machine_late_initcall(powermac, pmac_late_init);
345
346void note_bootable_part(dev_t dev, int part, int goodness);
347
348
349
350
351
352
353void __ref note_bootable_part(dev_t dev, int part, int goodness)
354{
355 char *p;
356
357 if (!initializing)
358 return;
359 if ((goodness <= current_root_goodness) &&
360 ROOT_DEV != DEFAULT_ROOT_DEVICE)
361 return;
362 p = strstr(boot_command_line, "root=");
363 if (p != NULL && (p == boot_command_line || p[-1] == ' '))
364 return;
365
366 ROOT_DEV = dev + part;
367 current_root_goodness = goodness;
368}
369
370#ifdef CONFIG_ADB_CUDA
371static void __noreturn cuda_restart(void)
372{
373 struct adb_request req;
374
375 cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
376 for (;;)
377 cuda_poll();
378}
379
380static void __noreturn cuda_shutdown(void)
381{
382 struct adb_request req;
383
384 cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
385 for (;;)
386 cuda_poll();
387}
388
389#else
390#define cuda_restart()
391#define cuda_shutdown()
392#endif
393
394#ifndef CONFIG_ADB_PMU
395#define pmu_restart()
396#define pmu_shutdown()
397#endif
398
399#ifndef CONFIG_PMAC_SMU
400#define smu_restart()
401#define smu_shutdown()
402#endif
403
404static void __noreturn pmac_restart(char *cmd)
405{
406 switch (sys_ctrler) {
407 case SYS_CTRLER_CUDA:
408 cuda_restart();
409 break;
410 case SYS_CTRLER_PMU:
411 pmu_restart();
412 break;
413 case SYS_CTRLER_SMU:
414 smu_restart();
415 break;
416 default: ;
417 }
418 while (1) ;
419}
420
421static void __noreturn pmac_power_off(void)
422{
423 switch (sys_ctrler) {
424 case SYS_CTRLER_CUDA:
425 cuda_shutdown();
426 break;
427 case SYS_CTRLER_PMU:
428 pmu_shutdown();
429 break;
430 case SYS_CTRLER_SMU:
431 smu_shutdown();
432 break;
433 default: ;
434 }
435 while (1) ;
436}
437
438static void __noreturn
439pmac_halt(void)
440{
441 pmac_power_off();
442}
443
444
445
446
447static void __init pmac_init(void)
448{
449
450 if (strstr(boot_command_line, "btextdbg")) {
451 udbg_adb_init_early();
452 register_early_udbg_console();
453 }
454
455
456 pmac_feature_init();
457
458
459 udbg_scc_init(!!strstr(boot_command_line, "sccdbg"));
460 udbg_adb_init(!!strstr(boot_command_line, "btextdbg"));
461
462#ifdef CONFIG_PPC64
463 iommu_init_early_dart(&pmac_pci_controller_ops);
464#endif
465
466
467
468
469
470#ifdef CONFIG_SMP
471 pmac_setup_smp();
472#endif
473}
474
475static int __init pmac_declare_of_platform_devices(void)
476{
477 struct device_node *np;
478
479 np = of_find_node_by_name(NULL, "valkyrie");
480 if (np) {
481 of_platform_device_create(np, "valkyrie", NULL);
482 of_node_put(np);
483 }
484 np = of_find_node_by_name(NULL, "platinum");
485 if (np) {
486 of_platform_device_create(np, "platinum", NULL);
487 of_node_put(np);
488 }
489 np = of_find_node_by_type(NULL, "smu");
490 if (np) {
491 of_platform_device_create(np, "smu", NULL);
492 of_node_put(np);
493 }
494 np = of_find_node_by_type(NULL, "fcu");
495 if (np == NULL) {
496
497 np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e");
498 }
499 if (np) {
500 of_platform_device_create(np, "temperature", NULL);
501 of_node_put(np);
502 }
503
504 return 0;
505}
506machine_device_initcall(powermac, pmac_declare_of_platform_devices);
507
508#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
509
510
511
512
513
514
515static int __init check_pmac_serial_console(void)
516{
517 struct device_node *prom_stdout = NULL;
518 int offset = 0;
519 const char *name;
520#ifdef CONFIG_SERIAL_PMACZILOG_TTYS
521 char *devname = "ttyS";
522#else
523 char *devname = "ttyPZ";
524#endif
525
526 pr_debug(" -> check_pmac_serial_console()\n");
527
528
529 if (strstr(boot_command_line, "console=")) {
530 pr_debug(" console was specified !\n");
531 return -EBUSY;
532 }
533
534 if (!of_chosen) {
535 pr_debug(" of_chosen is NULL !\n");
536 return -ENODEV;
537 }
538
539
540
541 name = of_get_property(of_chosen, "linux,stdout-path", NULL);
542 if (name == NULL) {
543 pr_debug(" no linux,stdout-path !\n");
544 return -ENODEV;
545 }
546 prom_stdout = of_find_node_by_path(name);
547 if (!prom_stdout) {
548 pr_debug(" can't find stdout package %s !\n", name);
549 return -ENODEV;
550 }
551 pr_debug("stdout is %pOF\n", prom_stdout);
552
553 if (of_node_name_eq(prom_stdout, "ch-a"))
554 offset = 0;
555 else if (of_node_name_eq(prom_stdout, "ch-b"))
556 offset = 1;
557 else
558 goto not_found;
559 of_node_put(prom_stdout);
560
561 pr_debug("Found serial console at %s%d\n", devname, offset);
562
563 return add_preferred_console(devname, offset, NULL);
564
565 not_found:
566 pr_debug("No preferred console found !\n");
567 of_node_put(prom_stdout);
568 return -ENODEV;
569}
570console_initcall(check_pmac_serial_console);
571
572#endif
573
574
575
576
577static int __init pmac_probe(void)
578{
579 if (!of_machine_is_compatible("Power Macintosh") &&
580 !of_machine_is_compatible("MacRISC"))
581 return 0;
582
583#ifdef CONFIG_PPC32
584
585 DMA_MODE_READ = 1;
586 DMA_MODE_WRITE = 2;
587#endif
588
589 pm_power_off = pmac_power_off;
590
591 pmac_init();
592
593 return 1;
594}
595
596define_machine(powermac) {
597 .name = "PowerMac",
598 .probe = pmac_probe,
599 .setup_arch = pmac_setup_arch,
600 .discover_phbs = pmac_pci_init,
601 .show_cpuinfo = pmac_show_cpuinfo,
602 .init_IRQ = pmac_pic_init,
603 .get_irq = NULL,
604 .pci_irq_fixup = pmac_pci_irq_fixup,
605 .restart = pmac_restart,
606 .halt = pmac_halt,
607 .time_init = pmac_time_init,
608 .get_boot_time = pmac_get_boot_time,
609 .set_rtc_time = pmac_set_rtc_time,
610 .get_rtc_time = pmac_get_rtc_time,
611 .calibrate_decr = pmac_calibrate_decr,
612 .feature_call = pmac_do_feature_call,
613 .progress = udbg_progress,
614#ifdef CONFIG_PPC64
615 .power_save = power4_idle,
616 .enable_pmcs = power4_enable_pmcs,
617#endif
618#ifdef CONFIG_PPC32
619 .pcibios_after_init = pmac_pcibios_after_init,
620 .phys_mem_access_prot = pci_phys_mem_access_prot,
621#endif
622};
623