Commit | Line | Data |
---|---|---|
14cf11af | 1 | /* |
35499c01 | 2 | * Powermac setup and early boot code plus other random bits. |
14cf11af PM |
3 | * |
4 | * PowerPC version | |
5 | * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) | |
6 | * | |
7 | * Adapted for Power Macintosh by Paul Mackerras | |
35499c01 | 8 | * Copyright (C) 1996 Paul Mackerras (paulus@samba.org) |
14cf11af PM |
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 | ||
14cf11af PM |
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> | |
14cf11af | 34 | #include <linux/user.h> |
14cf11af PM |
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> | |
14cf11af PM |
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> | |
5f867dc7 JL |
52 | #include <linux/of_device.h> |
53 | #include <linux/of_platform.h> | |
95f72d1e | 54 | #include <linux/memblock.h> |
14cf11af PM |
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> | |
14cf11af PM |
67 | #include <asm/cputable.h> |
68 | #include <asm/btext.h> | |
69 | #include <asm/pmac_feature.h> | |
70 | #include <asm/time.h> | |
14cf11af | 71 | #include <asm/mmu_context.h> |
35499c01 PM |
72 | #include <asm/iommu.h> |
73 | #include <asm/smu.h> | |
74 | #include <asm/pmc.h> | |
51d3082f | 75 | #include <asm/udbg.h> |
14cf11af | 76 | |
3c3f42d6 | 77 | #include "pmac.h" |
14cf11af PM |
78 | |
79 | #undef SHOW_GATWICK_IRQS | |
80 | ||
14cf11af PM |
81 | int ppc_override_l2cr = 0; |
82 | int ppc_override_l2cr_value; | |
83 | int has_l2cache = 0; | |
84 | ||
d2515c80 | 85 | int pmac_newworld; |
9b6b563c | 86 | |
14cf11af PM |
87 | static int current_root_goodness = -1; |
88 | ||
35499c01 | 89 | extern struct machdep_calls pmac_md; |
14cf11af PM |
90 | |
91 | #define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */ | |
92 | ||
35499c01 | 93 | #ifdef CONFIG_PPC64 |
35499c01 | 94 | int sccdbg; |
14cf11af PM |
95 | #endif |
96 | ||
97 | sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN; | |
35499c01 PM |
98 | EXPORT_SYMBOL(sys_ctrler); |
99 | ||
100 | #ifdef CONFIG_PMAC_SMU | |
101 | unsigned long smu_cmdbuf_abs; | |
102 | EXPORT_SYMBOL(smu_cmdbuf_abs); | |
103 | #endif | |
14cf11af | 104 | |
0dd194d0 | 105 | static void pmac_show_cpuinfo(struct seq_file *m) |
14cf11af PM |
106 | { |
107 | struct device_node *np; | |
018a3d1d | 108 | const char *pp; |
14cf11af | 109 | int plen; |
0dd194d0 PM |
110 | int mbmodel; |
111 | unsigned int mbflags; | |
14cf11af PM |
112 | char* mbname; |
113 | ||
0dd194d0 PM |
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) | |
14cf11af PM |
120 | mbname = "Unknown"; |
121 | ||
122 | /* find motherboard type */ | |
123 | seq_printf(m, "machine\t\t: "); | |
0dd194d0 | 124 | np = of_find_node_by_path("/"); |
14cf11af | 125 | if (np != NULL) { |
e2eb6392 | 126 | pp = of_get_property(np, "model", NULL); |
14cf11af PM |
127 | if (pp != NULL) |
128 | seq_printf(m, "%s\n", pp); | |
129 | else | |
130 | seq_printf(m, "PowerMac\n"); | |
e2eb6392 | 131 | pp = of_get_property(np, "compatible", &plen); |
14cf11af PM |
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 | } | |
0dd194d0 | 142 | of_node_put(np); |
14cf11af PM |
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 */ | |
0dd194d0 PM |
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) { | |
e2eb6392 SR |
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); | |
14cf11af PM |
159 | seq_printf(m, "L2 cache\t:"); |
160 | has_l2cache = 1; | |
e2eb6392 | 161 | if (of_get_property(np, "cache-unified", NULL) != 0 && dc) { |
14cf11af PM |
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 | } | |
e2eb6392 | 170 | pp = of_get_property(np, "ram-type", NULL); |
14cf11af PM |
171 | if (pp) |
172 | seq_printf(m, " %s", pp); | |
173 | seq_printf(m, "\n"); | |
0dd194d0 | 174 | of_node_put(np); |
14cf11af PM |
175 | } |
176 | ||
177 | /* Indicate newworld/oldworld */ | |
178 | seq_printf(m, "pmac-generation\t: %s\n", | |
179 | pmac_newworld ? "NewWorld" : "OldWorld"); | |
14cf11af PM |
180 | } |
181 | ||
35499c01 PM |
182 | #ifndef CONFIG_ADB_CUDA |
183 | int find_via_cuda(void) | |
184 | { | |
30686ba6 SR |
185 | struct device_node *dn = of_find_node_by_name(NULL, "via-cuda"); |
186 | ||
187 | if (!dn) | |
35499c01 | 188 | return 0; |
30686ba6 | 189 | of_node_put(dn); |
35499c01 PM |
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 | |
14cf11af | 195 | |
35499c01 PM |
196 | #ifndef CONFIG_ADB_PMU |
197 | int find_via_pmu(void) | |
14cf11af | 198 | { |
30686ba6 SR |
199 | struct device_node *dn = of_find_node_by_name(NULL, "via-pmu"); |
200 | ||
201 | if (!dn) | |
35499c01 | 202 | return 0; |
30686ba6 | 203 | of_node_put(dn); |
35499c01 PM |
204 | printk("WARNING ! Your machine is PMU-based but your kernel\n"); |
205 | printk(" wasn't compiled with CONFIG_ADB_PMU option !\n"); | |
a575b807 | 206 | return 0; |
35499c01 PM |
207 | } |
208 | #endif | |
14cf11af | 209 | |
35499c01 PM |
210 | #ifndef CONFIG_PMAC_SMU |
211 | int smu_init(void) | |
212 | { | |
213 | /* should check and warn if SMU is present */ | |
214 | return 0; | |
215 | } | |
216 | #endif | |
14cf11af | 217 | |
35499c01 PM |
218 | #ifdef CONFIG_PPC32 |
219 | static volatile u32 *sysctrl_regs; | |
14cf11af | 220 | |
35499c01 PM |
221 | static void __init ohare_init(void) |
222 | { | |
30686ba6 SR |
223 | struct device_node *dn; |
224 | ||
14cf11af PM |
225 | /* this area has the CPU identification register |
226 | and some registers used by smp boards */ | |
227 | sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000); | |
14cf11af | 228 | |
35499c01 PM |
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 | */ | |
30686ba6 SR |
234 | dn = of_find_node_by_name(NULL, "ohare"); |
235 | if (dn) { | |
236 | of_node_put(dn); | |
35499c01 PM |
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 | } | |
14cf11af | 247 | |
35499c01 PM |
248 | static void __init l2cr_init(void) |
249 | { | |
14cf11af PM |
250 | /* Checks "l2cr-value" property in the registry */ |
251 | if (cpu_has_feature(CPU_FTR_L2CR)) { | |
1658ab66 | 252 | struct device_node *np = of_find_node_by_name(NULL, "cpus"); |
14cf11af | 253 | if (np == 0) |
1658ab66 | 254 | np = of_find_node_by_type(NULL, "cpu"); |
14cf11af | 255 | if (np != 0) { |
018a3d1d | 256 | const unsigned int *l2cr = |
e2eb6392 | 257 | of_get_property(np, "l2cr-value", NULL); |
14cf11af PM |
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 | } | |
1658ab66 | 264 | of_node_put(np); |
14cf11af PM |
265 | } |
266 | } | |
267 | ||
268 | if (ppc_override_l2cr) | |
35499c01 PM |
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) | |
14cf11af | 273 | ? "enabled" : "disabled"); |
35499c01 PM |
274 | } |
275 | #endif | |
276 | ||
ff38e7c8 | 277 | static void __init pmac_setup_arch(void) |
35499c01 | 278 | { |
a575b807 | 279 | struct device_node *cpu, *ic; |
018a3d1d | 280 | const int *fp; |
35499c01 PM |
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) { | |
e2eb6392 | 290 | fp = of_get_property(cpu, "clock-frequency", NULL); |
35499c01 PM |
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 | ||
a575b807 | 305 | /* See if newworld or oldworld */ |
22059a90 | 306 | ic = of_find_node_with_property(NULL, "interrupt-controller"); |
d2515c80 OH |
307 | if (ic) { |
308 | pmac_newworld = 1; | |
a575b807 | 309 | of_node_put(ic); |
d2515c80 | 310 | } |
a575b807 | 311 | |
35499c01 PM |
312 | /* Lookup PCI hosts */ |
313 | pmac_pci_init(); | |
314 | ||
315 | #ifdef CONFIG_PPC32 | |
316 | ohare_init(); | |
317 | l2cr_init(); | |
318 | #endif /* CONFIG_PPC32 */ | |
319 | ||
14cf11af | 320 | find_via_cuda(); |
14cf11af | 321 | find_via_pmu(); |
35499c01 PM |
322 | smu_init(); |
323 | ||
21e38dfe TB |
324 | #if defined(CONFIG_NVRAM) || defined(CONFIG_NVRAM_MODULE) || \ |
325 | defined(CONFIG_PPC64) | |
14cf11af PM |
326 | pmac_nvram_init(); |
327 | #endif | |
35499c01 PM |
328 | |
329 | #ifdef CONFIG_PPC32 | |
14cf11af PM |
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; | |
35499c01 | 336 | #endif |
14cf11af | 337 | |
e8222502 BH |
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 */ | |
14cf11af PM |
344 | } |
345 | ||
14cf11af | 346 | #ifdef CONFIG_SCSI |
405861a0 | 347 | void note_scsi_host(struct device_node *node, void *host) |
14cf11af | 348 | { |
14cf11af | 349 | } |
9b6b563c | 350 | EXPORT_SYMBOL(note_scsi_host); |
14cf11af PM |
351 | #endif |
352 | ||
35499c01 PM |
353 | static int initializing = 1; |
354 | ||
14cf11af PM |
355 | static int pmac_late_init(void) |
356 | { | |
357 | initializing = 0; | |
d9333afd JB |
358 | /* this is udbg (which is __init) and we can later use it during |
359 | * cpu hotplug (in smp_core99_kick_cpu) */ | |
360 | ppc_md.progress = NULL; | |
14cf11af PM |
361 | return 0; |
362 | } | |
d518b717 | 363 | machine_late_initcall(powermac, pmac_late_init); |
14cf11af | 364 | |
d7418031 SR |
365 | /* |
366 | * This is __init_refok because we check for "initializing" before | |
367 | * touching any of the __init sensitive things and "initializing" | |
368 | * will be false after __init time. This can't be __init because it | |
369 | * can be called whenever a disk is first accessed. | |
370 | */ | |
371 | void __init_refok note_bootable_part(dev_t dev, int part, int goodness) | |
14cf11af | 372 | { |
14cf11af PM |
373 | char *p; |
374 | ||
375 | if (!initializing) | |
376 | return; | |
377 | if ((goodness <= current_root_goodness) && | |
378 | ROOT_DEV != DEFAULT_ROOT_DEVICE) | |
379 | return; | |
b8757b21 ABL |
380 | p = strstr(boot_command_line, "root="); |
381 | if (p != NULL && (p == boot_command_line || p[-1] == ' ')) | |
14cf11af PM |
382 | return; |
383 | ||
6ee0d9f7 PM |
384 | ROOT_DEV = dev + part; |
385 | current_root_goodness = goodness; | |
14cf11af PM |
386 | } |
387 | ||
14cf11af | 388 | #ifdef CONFIG_ADB_CUDA |
35499c01 PM |
389 | static void cuda_restart(void) |
390 | { | |
14cf11af | 391 | struct adb_request req; |
14cf11af | 392 | |
35499c01 PM |
393 | cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM); |
394 | for (;;) | |
395 | cuda_poll(); | |
396 | } | |
397 | ||
398 | static void cuda_shutdown(void) | |
399 | { | |
400 | struct adb_request req; | |
401 | ||
402 | cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN); | |
403 | for (;;) | |
404 | cuda_poll(); | |
405 | } | |
406 | ||
407 | #else | |
408 | #define cuda_restart() | |
409 | #define cuda_shutdown() | |
410 | #endif | |
411 | ||
412 | #ifndef CONFIG_ADB_PMU | |
413 | #define pmu_restart() | |
414 | #define pmu_shutdown() | |
415 | #endif | |
416 | ||
417 | #ifndef CONFIG_PMAC_SMU | |
418 | #define smu_restart() | |
419 | #define smu_shutdown() | |
420 | #endif | |
421 | ||
422 | static void pmac_restart(char *cmd) | |
423 | { | |
14cf11af | 424 | switch (sys_ctrler) { |
14cf11af | 425 | case SYS_CTRLER_CUDA: |
35499c01 | 426 | cuda_restart(); |
14cf11af | 427 | break; |
14cf11af PM |
428 | case SYS_CTRLER_PMU: |
429 | pmu_restart(); | |
430 | break; | |
35499c01 PM |
431 | case SYS_CTRLER_SMU: |
432 | smu_restart(); | |
433 | break; | |
14cf11af PM |
434 | default: ; |
435 | } | |
436 | } | |
437 | ||
35499c01 | 438 | static void pmac_power_off(void) |
14cf11af | 439 | { |
14cf11af | 440 | switch (sys_ctrler) { |
14cf11af | 441 | case SYS_CTRLER_CUDA: |
35499c01 | 442 | cuda_shutdown(); |
14cf11af | 443 | break; |
14cf11af PM |
444 | case SYS_CTRLER_PMU: |
445 | pmu_shutdown(); | |
446 | break; | |
35499c01 PM |
447 | case SYS_CTRLER_SMU: |
448 | smu_shutdown(); | |
449 | break; | |
14cf11af PM |
450 | default: ; |
451 | } | |
452 | } | |
453 | ||
454 | static void | |
455 | pmac_halt(void) | |
456 | { | |
457 | pmac_power_off(); | |
458 | } | |
459 | ||
35499c01 PM |
460 | /* |
461 | * Early initialization. | |
462 | */ | |
463 | static void __init pmac_init_early(void) | |
464 | { | |
51d3082f BH |
465 | /* Enable early btext debug if requested */ |
466 | if (strstr(cmd_line, "btextdbg")) { | |
467 | udbg_adb_init_early(); | |
468 | register_early_udbg_console(); | |
35499c01 PM |
469 | } |
470 | ||
51d3082f BH |
471 | /* Probe motherboard chipset */ |
472 | pmac_feature_init(); | |
473 | ||
51d3082f BH |
474 | /* Initialize debug stuff */ |
475 | udbg_scc_init(!!strstr(cmd_line, "sccdbg")); | |
476 | udbg_adb_init(!!strstr(cmd_line, "btextdbg")); | |
477 | ||
478 | #ifdef CONFIG_PPC64 | |
1beb6a7d | 479 | iommu_init_early_dart(); |
35499c01 | 480 | #endif |
7ccbe504 BH |
481 | |
482 | /* SMP Init has to be done early as we need to patch up | |
828a6986 | 483 | * cpu_possible_mask before interrupt stacks are allocated |
7ccbe504 BH |
484 | * or kaboom... |
485 | */ | |
486 | #ifdef CONFIG_SMP | |
487 | pmac_setup_smp(); | |
488 | #endif | |
35499c01 PM |
489 | } |
490 | ||
35499c01 | 491 | static int __init pmac_declare_of_platform_devices(void) |
14cf11af | 492 | { |
a28d3af2 | 493 | struct device_node *np; |
14cf11af | 494 | |
e8222502 BH |
495 | if (machine_is(chrp)) |
496 | return -1; | |
497 | ||
730745a5 | 498 | np = of_find_node_by_name(NULL, "valkyrie"); |
35499c01 PM |
499 | if (np) |
500 | of_platform_device_create(np, "valkyrie", NULL); | |
730745a5 | 501 | np = of_find_node_by_name(NULL, "platinum"); |
35499c01 PM |
502 | if (np) |
503 | of_platform_device_create(np, "platinum", NULL); | |
35499c01 PM |
504 | np = of_find_node_by_type(NULL, "smu"); |
505 | if (np) { | |
506 | of_platform_device_create(np, "smu", NULL); | |
507 | of_node_put(np); | |
508 | } | |
14cf11af PM |
509 | |
510 | return 0; | |
511 | } | |
d518b717 | 512 | machine_device_initcall(powermac, pmac_declare_of_platform_devices); |
35499c01 | 513 | |
025d7917 BH |
514 | #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE |
515 | /* | |
516 | * This is called very early, as part of console_init() (typically just after | |
517 | * time_init()). This function is respondible for trying to find a good | |
518 | * default console on serial ports. It tries to match the open firmware | |
519 | * default output with one of the available serial console drivers. | |
520 | */ | |
521 | static int __init check_pmac_serial_console(void) | |
522 | { | |
523 | struct device_node *prom_stdout = NULL; | |
524 | int offset = 0; | |
525 | const char *name; | |
526 | #ifdef CONFIG_SERIAL_PMACZILOG_TTYS | |
527 | char *devname = "ttyS"; | |
528 | #else | |
529 | char *devname = "ttyPZ"; | |
530 | #endif | |
531 | ||
532 | pr_debug(" -> check_pmac_serial_console()\n"); | |
533 | ||
534 | /* The user has requested a console so this is already set up. */ | |
535 | if (strstr(boot_command_line, "console=")) { | |
536 | pr_debug(" console was specified !\n"); | |
537 | return -EBUSY; | |
538 | } | |
539 | ||
540 | if (!of_chosen) { | |
541 | pr_debug(" of_chosen is NULL !\n"); | |
542 | return -ENODEV; | |
543 | } | |
544 | ||
545 | /* We are getting a weird phandle from OF ... */ | |
546 | /* ... So use the full path instead */ | |
547 | name = of_get_property(of_chosen, "linux,stdout-path", NULL); | |
548 | if (name == NULL) { | |
549 | pr_debug(" no linux,stdout-path !\n"); | |
550 | return -ENODEV; | |
551 | } | |
552 | prom_stdout = of_find_node_by_path(name); | |
553 | if (!prom_stdout) { | |
554 | pr_debug(" can't find stdout package %s !\n", name); | |
555 | return -ENODEV; | |
556 | } | |
557 | pr_debug("stdout is %s\n", prom_stdout->full_name); | |
558 | ||
559 | name = of_get_property(prom_stdout, "name", NULL); | |
560 | if (!name) { | |
561 | pr_debug(" stdout package has no name !\n"); | |
562 | goto not_found; | |
563 | } | |
564 | ||
565 | if (strcmp(name, "ch-a") == 0) | |
566 | offset = 0; | |
567 | else if (strcmp(name, "ch-b") == 0) | |
568 | offset = 1; | |
569 | else | |
570 | goto not_found; | |
571 | of_node_put(prom_stdout); | |
572 | ||
573 | pr_debug("Found serial console at %s%d\n", devname, offset); | |
574 | ||
575 | return add_preferred_console(devname, offset, NULL); | |
576 | ||
577 | not_found: | |
578 | pr_debug("No preferred console found !\n"); | |
579 | of_node_put(prom_stdout); | |
580 | return -ENODEV; | |
581 | } | |
582 | console_initcall(check_pmac_serial_console); | |
583 | ||
584 | #endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ | |
585 | ||
35499c01 PM |
586 | /* |
587 | * Called very early, MMU is off, device-tree isn't unflattened | |
588 | */ | |
e8222502 | 589 | static int __init pmac_probe(void) |
35499c01 | 590 | { |
e8222502 BH |
591 | unsigned long root = of_get_flat_dt_root(); |
592 | ||
593 | if (!of_flat_dt_is_compatible(root, "Power Macintosh") && | |
594 | !of_flat_dt_is_compatible(root, "MacRISC")) | |
35499c01 PM |
595 | return 0; |
596 | ||
e8222502 | 597 | #ifdef CONFIG_PPC64 |
35499c01 PM |
598 | /* |
599 | * On U3, the DART (iommu) must be allocated now since it | |
600 | * has an impact on htab_initialize (due to the large page it | |
601 | * occupies having to be broken up so the DART itself is not | |
602 | * part of the cacheable linar mapping | |
603 | */ | |
1beb6a7d | 604 | alloc_dart_table(); |
7d0daae4 ME |
605 | |
606 | hpte_init_native(); | |
35499c01 PM |
607 | #endif |
608 | ||
e8222502 BH |
609 | #ifdef CONFIG_PPC32 |
610 | /* isa_io_base gets set in pmac_pci_init */ | |
e8222502 BH |
611 | ISA_DMA_THRESHOLD = ~0L; |
612 | DMA_MODE_READ = 1; | |
613 | DMA_MODE_WRITE = 2; | |
e8222502 BH |
614 | #endif /* CONFIG_PPC32 */ |
615 | ||
35499c01 PM |
616 | #ifdef CONFIG_PMAC_SMU |
617 | /* | |
618 | * SMU based G5s need some memory below 2Gb, at least the current | |
619 | * driver needs that. We have to allocate it now. We allocate 4k | |
620 | * (1 small page) for now. | |
621 | */ | |
95f72d1e | 622 | smu_cmdbuf_abs = memblock_alloc_base(4096, 4096, 0x80000000UL); |
35499c01 PM |
623 | #endif /* CONFIG_PMAC_SMU */ |
624 | ||
625 | return 1; | |
626 | } | |
627 | ||
628 | #ifdef CONFIG_PPC64 | |
51d3082f BH |
629 | /* Move that to pci.c */ |
630 | static int pmac_pci_probe_mode(struct pci_bus *bus) | |
35499c01 | 631 | { |
95272262 | 632 | struct device_node *node = pci_bus_to_OF_node(bus); |
35499c01 PM |
633 | |
634 | /* We need to use normal PCI probing for the AGP bus, | |
1beb6a7d | 635 | * since the device for the AGP bridge isn't in the tree. |
444532d4 | 636 | * Same for the PCIe host on U4 and the HT host bridge. |
1beb6a7d | 637 | */ |
55b61fec | 638 | if (bus->self == NULL && (of_device_is_compatible(node, "u3-agp") || |
444532d4 BH |
639 | of_device_is_compatible(node, "u4-pcie") || |
640 | of_device_is_compatible(node, "u3-ht"))) | |
35499c01 | 641 | return PCI_PROBE_NORMAL; |
35499c01 PM |
642 | return PCI_PROBE_DEVTREE; |
643 | } | |
d9333afd JB |
644 | |
645 | #ifdef CONFIG_HOTPLUG_CPU | |
646 | /* access per cpu vars from generic smp.c */ | |
647 | DECLARE_PER_CPU(int, cpu_state); | |
648 | ||
abb17f9c | 649 | static void pmac64_cpu_die(void) |
d9333afd JB |
650 | { |
651 | /* | |
652 | * turn off as much as possible, we'll be | |
653 | * kicked out as this will only be invoked | |
654 | * on core99 platforms for now ... | |
655 | */ | |
656 | ||
657 | printk(KERN_INFO "CPU#%d offline\n", smp_processor_id()); | |
658 | __get_cpu_var(cpu_state) = CPU_DEAD; | |
659 | smp_wmb(); | |
660 | ||
661 | /* | |
662 | * during the path that leads here preemption is disabled, | |
663 | * reenable it now so that when coming up preempt count is | |
664 | * zero correctly | |
665 | */ | |
666 | preempt_enable(); | |
667 | ||
668 | /* | |
669 | * hard-disable interrupts for the non-NAP case, the NAP code | |
670 | * needs to re-enable interrupts (but soft-disables them) | |
671 | */ | |
672 | hard_irq_disable(); | |
673 | ||
674 | while (1) { | |
675 | /* let's not take timer interrupts too often ... */ | |
676 | set_dec(0x7fffffff); | |
677 | ||
678 | /* should always be true at this point */ | |
679 | if (cpu_has_feature(CPU_FTR_CAN_NAP)) | |
680 | power4_cpu_offline_powersave(); | |
681 | else { | |
682 | HMT_low(); | |
683 | HMT_very_low(); | |
684 | } | |
685 | } | |
686 | } | |
687 | #endif /* CONFIG_HOTPLUG_CPU */ | |
688 | ||
689 | #endif /* CONFIG_PPC64 */ | |
35499c01 | 690 | |
e8222502 BH |
691 | define_machine(powermac) { |
692 | .name = "PowerMac", | |
35499c01 PM |
693 | .probe = pmac_probe, |
694 | .setup_arch = pmac_setup_arch, | |
695 | .init_early = pmac_init_early, | |
696 | .show_cpuinfo = pmac_show_cpuinfo, | |
35499c01 | 697 | .init_IRQ = pmac_pic_init, |
cc5d0189 | 698 | .get_irq = NULL, /* changed later */ |
f90bb153 | 699 | .pci_irq_fixup = pmac_pci_irq_fixup, |
35499c01 PM |
700 | .restart = pmac_restart, |
701 | .power_off = pmac_power_off, | |
702 | .halt = pmac_halt, | |
703 | .time_init = pmac_time_init, | |
704 | .get_boot_time = pmac_get_boot_time, | |
705 | .set_rtc_time = pmac_set_rtc_time, | |
706 | .get_rtc_time = pmac_get_rtc_time, | |
707 | .calibrate_decr = pmac_calibrate_decr, | |
708 | .feature_call = pmac_do_feature_call, | |
be6b8439 | 709 | .progress = udbg_progress, |
35499c01 | 710 | #ifdef CONFIG_PPC64 |
51d3082f | 711 | .pci_probe_mode = pmac_pci_probe_mode, |
a0652fc9 | 712 | .power_save = power4_idle, |
35499c01 | 713 | .enable_pmcs = power4_enable_pmcs, |
3d1229d6 | 714 | #endif /* CONFIG_PPC64 */ |
35499c01 PM |
715 | #ifdef CONFIG_PPC32 |
716 | .pcibios_enable_device_hook = pmac_pci_enable_device_hook, | |
717 | .pcibios_after_init = pmac_pcibios_after_init, | |
718 | .phys_mem_access_prot = pci_phys_mem_access_prot, | |
719 | #endif | |
abb17f9c MM |
720 | #ifdef CONFIG_HOTPLUG_CPU |
721 | #ifdef CONFIG_PPC64 | |
722 | .cpu_die = pmac64_cpu_die, | |
723 | #endif | |
724 | #ifdef CONFIG_PPC32 | |
725 | .cpu_die = pmac32_cpu_die, | |
726 | #endif | |
e8222502 | 727 | #endif |
4c4ece3c GP |
728 | #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC32) |
729 | .cpu_die = generic_mach_cpu_die, | |
730 | #endif | |
35499c01 | 731 | }; |