Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Common prep/pmac/chrp boot and setup code. | |
3 | */ | |
4 | ||
5 | #include <linux/config.h> | |
6 | #include <linux/module.h> | |
7 | #include <linux/string.h> | |
8 | #include <linux/sched.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/reboot.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/initrd.h> | |
14 | #include <linux/ide.h> | |
15 | #include <linux/tty.h> | |
16 | #include <linux/bootmem.h> | |
17 | #include <linux/seq_file.h> | |
18 | #include <linux/root_dev.h> | |
19 | #include <linux/cpu.h> | |
20 | #include <linux/console.h> | |
21 | ||
22 | #include <asm/residual.h> | |
23 | #include <asm/io.h> | |
24 | #include <asm/prom.h> | |
25 | #include <asm/processor.h> | |
26 | #include <asm/pgtable.h> | |
27 | #include <asm/bootinfo.h> | |
28 | #include <asm/setup.h> | |
29 | #include <asm/amigappc.h> | |
30 | #include <asm/smp.h> | |
31 | #include <asm/elf.h> | |
32 | #include <asm/cputable.h> | |
33 | #include <asm/bootx.h> | |
34 | #include <asm/btext.h> | |
35 | #include <asm/machdep.h> | |
36 | #include <asm/uaccess.h> | |
37 | #include <asm/system.h> | |
38 | #include <asm/pmac_feature.h> | |
39 | #include <asm/sections.h> | |
40 | #include <asm/nvram.h> | |
41 | #include <asm/xmon.h> | |
42 | #include <asm/ocp.h> | |
43 | ||
8e8fff09 KG |
44 | #define USES_PPC_SYS (defined(CONFIG_85xx) || defined(CONFIG_83xx) || \ |
45 | defined(CONFIG_MPC10X_BRIDGE) || defined(CONFIG_8260) || \ | |
46 | defined(CONFIG_PPC_MPC52xx)) | |
47 | ||
48 | #if USES_PPC_SYS | |
1da177e4 LT |
49 | #include <asm/ppc_sys.h> |
50 | #endif | |
51 | ||
52 | #if defined CONFIG_KGDB | |
53 | #include <asm/kgdb.h> | |
54 | #endif | |
55 | ||
56 | extern void platform_init(unsigned long r3, unsigned long r4, | |
57 | unsigned long r5, unsigned long r6, unsigned long r7); | |
58 | extern void bootx_init(unsigned long r4, unsigned long phys); | |
59 | extern void identify_cpu(unsigned long offset, unsigned long cpu); | |
60 | extern void do_cpu_ftr_fixups(unsigned long offset); | |
61 | extern void reloc_got2(unsigned long offset); | |
62 | ||
63 | extern void ppc6xx_idle(void); | |
64 | extern void power4_idle(void); | |
65 | ||
66 | extern boot_infos_t *boot_infos; | |
67 | struct ide_machdep_calls ppc_ide_md; | |
1da177e4 LT |
68 | |
69 | /* Used with the BI_MEMSIZE bootinfo parameter to store the memory | |
70 | size value reported by the boot loader. */ | |
71 | unsigned long boot_mem_size; | |
72 | ||
73 | unsigned long ISA_DMA_THRESHOLD; | |
b8f114db JL |
74 | unsigned int DMA_MODE_READ; |
75 | unsigned int DMA_MODE_WRITE; | |
1da177e4 LT |
76 | |
77 | #ifdef CONFIG_PPC_MULTIPLATFORM | |
78 | int _machine = 0; | |
79 | ||
80 | extern void prep_init(unsigned long r3, unsigned long r4, | |
81 | unsigned long r5, unsigned long r6, unsigned long r7); | |
82 | extern void pmac_init(unsigned long r3, unsigned long r4, | |
83 | unsigned long r5, unsigned long r6, unsigned long r7); | |
84 | extern void chrp_init(unsigned long r3, unsigned long r4, | |
85 | unsigned long r5, unsigned long r6, unsigned long r7); | |
14cf11af PM |
86 | |
87 | dev_t boot_dev; | |
1da177e4 LT |
88 | #endif /* CONFIG_PPC_MULTIPLATFORM */ |
89 | ||
90 | #ifdef CONFIG_MAGIC_SYSRQ | |
91 | unsigned long SYSRQ_KEY = 0x54; | |
92 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
93 | ||
94 | #ifdef CONFIG_VGA_CONSOLE | |
95 | unsigned long vgacon_remap_base; | |
96 | #endif | |
97 | ||
98 | struct machdep_calls ppc_md; | |
99 | ||
100 | /* | |
101 | * These are used in binfmt_elf.c to put aux entries on the stack | |
102 | * for each elf executable being started. | |
103 | */ | |
104 | int dcache_bsize; | |
105 | int icache_bsize; | |
106 | int ucache_bsize; | |
107 | ||
108 | #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \ | |
109 | defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA) | |
110 | struct screen_info screen_info = { | |
111 | 0, 25, /* orig-x, orig-y */ | |
112 | 0, /* unused */ | |
113 | 0, /* orig-video-page */ | |
114 | 0, /* orig-video-mode */ | |
115 | 80, /* orig-video-cols */ | |
116 | 0,0,0, /* ega_ax, ega_bx, ega_cx */ | |
117 | 25, /* orig-video-lines */ | |
118 | 1, /* orig-video-isVGA */ | |
119 | 16 /* orig-video-points */ | |
120 | }; | |
121 | #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */ | |
122 | ||
123 | void machine_restart(char *cmd) | |
124 | { | |
125 | #ifdef CONFIG_NVRAM | |
126 | nvram_sync(); | |
127 | #endif | |
128 | ppc_md.restart(cmd); | |
129 | } | |
130 | ||
1da177e4 LT |
131 | void machine_power_off(void) |
132 | { | |
133 | #ifdef CONFIG_NVRAM | |
134 | nvram_sync(); | |
135 | #endif | |
136 | ppc_md.power_off(); | |
137 | } | |
138 | ||
1da177e4 LT |
139 | void machine_halt(void) |
140 | { | |
141 | #ifdef CONFIG_NVRAM | |
142 | nvram_sync(); | |
143 | #endif | |
144 | ppc_md.halt(); | |
145 | } | |
146 | ||
1da177e4 LT |
147 | void (*pm_power_off)(void) = machine_power_off; |
148 | ||
149 | #ifdef CONFIG_TAU | |
150 | extern u32 cpu_temp(unsigned long cpu); | |
151 | extern u32 cpu_temp_both(unsigned long cpu); | |
152 | #endif /* CONFIG_TAU */ | |
153 | ||
154 | int show_cpuinfo(struct seq_file *m, void *v) | |
155 | { | |
156 | int i = (int) v - 1; | |
157 | int err = 0; | |
158 | unsigned int pvr; | |
159 | unsigned short maj, min; | |
160 | unsigned long lpj; | |
161 | ||
162 | if (i >= NR_CPUS) { | |
163 | /* Show summary information */ | |
164 | #ifdef CONFIG_SMP | |
165 | unsigned long bogosum = 0; | |
166 | for (i = 0; i < NR_CPUS; ++i) | |
167 | if (cpu_online(i)) | |
168 | bogosum += cpu_data[i].loops_per_jiffy; | |
169 | seq_printf(m, "total bogomips\t: %lu.%02lu\n", | |
170 | bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); | |
171 | #endif /* CONFIG_SMP */ | |
172 | ||
173 | if (ppc_md.show_cpuinfo != NULL) | |
174 | err = ppc_md.show_cpuinfo(m); | |
175 | return err; | |
176 | } | |
177 | ||
178 | #ifdef CONFIG_SMP | |
179 | if (!cpu_online(i)) | |
180 | return 0; | |
181 | pvr = cpu_data[i].pvr; | |
182 | lpj = cpu_data[i].loops_per_jiffy; | |
183 | #else | |
184 | pvr = mfspr(SPRN_PVR); | |
185 | lpj = loops_per_jiffy; | |
186 | #endif | |
187 | ||
188 | seq_printf(m, "processor\t: %d\n", i); | |
189 | seq_printf(m, "cpu\t\t: "); | |
190 | ||
191 | if (cur_cpu_spec[i]->pvr_mask) | |
192 | seq_printf(m, "%s", cur_cpu_spec[i]->cpu_name); | |
193 | else | |
194 | seq_printf(m, "unknown (%08x)", pvr); | |
195 | #ifdef CONFIG_ALTIVEC | |
196 | if (cur_cpu_spec[i]->cpu_features & CPU_FTR_ALTIVEC) | |
197 | seq_printf(m, ", altivec supported"); | |
198 | #endif | |
199 | seq_printf(m, "\n"); | |
200 | ||
201 | #ifdef CONFIG_TAU | |
202 | if (cur_cpu_spec[i]->cpu_features & CPU_FTR_TAU) { | |
203 | #ifdef CONFIG_TAU_AVERAGE | |
204 | /* more straightforward, but potentially misleading */ | |
205 | seq_printf(m, "temperature \t: %u C (uncalibrated)\n", | |
206 | cpu_temp(i)); | |
207 | #else | |
208 | /* show the actual temp sensor range */ | |
209 | u32 temp; | |
210 | temp = cpu_temp_both(i); | |
211 | seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", | |
212 | temp & 0xff, temp >> 16); | |
213 | #endif | |
214 | } | |
215 | #endif /* CONFIG_TAU */ | |
216 | ||
217 | if (ppc_md.show_percpuinfo != NULL) { | |
218 | err = ppc_md.show_percpuinfo(m, i); | |
219 | if (err) | |
220 | return err; | |
221 | } | |
222 | ||
696c2b9f KG |
223 | /* If we are a Freescale core do a simple check so |
224 | * we dont have to keep adding cases in the future */ | |
225 | if ((PVR_VER(pvr) & 0x8000) == 0x8000) { | |
1da177e4 LT |
226 | maj = PVR_MAJ(pvr); |
227 | min = PVR_MIN(pvr); | |
696c2b9f KG |
228 | } else { |
229 | switch (PVR_VER(pvr)) { | |
230 | case 0x0020: /* 403 family */ | |
231 | maj = PVR_MAJ(pvr) + 1; | |
232 | min = PVR_MIN(pvr); | |
233 | break; | |
234 | case 0x1008: /* 740P/750P ?? */ | |
235 | maj = ((pvr >> 8) & 0xFF) - 1; | |
236 | min = pvr & 0xFF; | |
237 | break; | |
238 | default: | |
239 | maj = (pvr >> 8) & 0xFF; | |
240 | min = pvr & 0xFF; | |
241 | break; | |
242 | } | |
1da177e4 LT |
243 | } |
244 | ||
245 | seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", | |
246 | maj, min, PVR_VER(pvr), PVR_REV(pvr)); | |
247 | ||
248 | seq_printf(m, "bogomips\t: %lu.%02lu\n", | |
249 | lpj / (500000/HZ), (lpj / (5000/HZ)) % 100); | |
250 | ||
8e8fff09 | 251 | #if USES_PPC_SYS |
1da177e4 LT |
252 | if (cur_ppc_sys_spec->ppc_sys_name) |
253 | seq_printf(m, "chipset\t\t: %s\n", | |
254 | cur_ppc_sys_spec->ppc_sys_name); | |
255 | #endif | |
256 | ||
257 | #ifdef CONFIG_SMP | |
258 | seq_printf(m, "\n"); | |
259 | #endif | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | static void *c_start(struct seq_file *m, loff_t *pos) | |
265 | { | |
266 | int i = *pos; | |
267 | ||
268 | return i <= NR_CPUS? (void *) (i + 1): NULL; | |
269 | } | |
270 | ||
271 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
272 | { | |
273 | ++*pos; | |
274 | return c_start(m, pos); | |
275 | } | |
276 | ||
277 | static void c_stop(struct seq_file *m, void *v) | |
278 | { | |
279 | } | |
280 | ||
281 | struct seq_operations cpuinfo_op = { | |
282 | .start =c_start, | |
283 | .next = c_next, | |
284 | .stop = c_stop, | |
285 | .show = show_cpuinfo, | |
286 | }; | |
287 | ||
288 | /* | |
289 | * We're called here very early in the boot. We determine the machine | |
290 | * type and call the appropriate low-level setup functions. | |
291 | * -- Cort <cort@fsmlabs.com> | |
292 | * | |
293 | * Note that the kernel may be running at an address which is different | |
294 | * from the address that it was linked at, so we must use RELOC/PTRRELOC | |
295 | * to access static data (including strings). -- paulus | |
296 | */ | |
297 | __init | |
298 | unsigned long | |
299 | early_init(int r3, int r4, int r5) | |
300 | { | |
301 | unsigned long phys; | |
302 | unsigned long offset = reloc_offset(); | |
303 | ||
304 | /* Default */ | |
305 | phys = offset + KERNELBASE; | |
306 | ||
307 | /* First zero the BSS -- use memset, some arches don't have | |
308 | * caches on yet */ | |
309 | memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start); | |
310 | ||
311 | /* | |
312 | * Identify the CPU type and fix up code sections | |
313 | * that depend on which cpu we have. | |
314 | */ | |
315 | identify_cpu(offset, 0); | |
316 | do_cpu_ftr_fixups(offset); | |
317 | ||
318 | #if defined(CONFIG_PPC_MULTIPLATFORM) | |
319 | reloc_got2(offset); | |
320 | ||
321 | /* If we came here from BootX, clear the screen, | |
322 | * set up some pointers and return. */ | |
323 | if ((r3 == 0x426f6f58) && (r5 == 0)) | |
324 | bootx_init(r4, phys); | |
325 | ||
326 | /* | |
327 | * don't do anything on prep | |
328 | * for now, don't use bootinfo because it breaks yaboot 0.5 | |
329 | * and assume that if we didn't find a magic number, we have OF | |
330 | */ | |
331 | else if (*(unsigned long *)(0) != 0xdeadc0de) | |
332 | phys = prom_init(r3, r4, (prom_entry)r5); | |
333 | ||
334 | reloc_got2(-offset); | |
335 | #endif | |
336 | ||
337 | return phys; | |
338 | } | |
339 | ||
340 | #ifdef CONFIG_PPC_OF | |
341 | /* | |
342 | * Assume here that all clock rates are the same in a | |
343 | * smp system. -- Cort | |
344 | */ | |
f495a8bf | 345 | int |
1da177e4 LT |
346 | of_show_percpuinfo(struct seq_file *m, int i) |
347 | { | |
348 | struct device_node *cpu_node; | |
349 | u32 *fp; | |
350 | int s; | |
351 | ||
352 | cpu_node = find_type_devices("cpu"); | |
353 | if (!cpu_node) | |
354 | return 0; | |
355 | for (s = 0; s < i && cpu_node->next; s++) | |
356 | cpu_node = cpu_node->next; | |
357 | fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL); | |
358 | if (fp) | |
359 | seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000); | |
360 | return 0; | |
361 | } | |
362 | ||
363 | void __init | |
364 | intuit_machine_type(void) | |
365 | { | |
366 | char *model; | |
367 | struct device_node *root; | |
368 | ||
369 | /* ask the OF info if we're a chrp or pmac */ | |
370 | root = find_path_device("/"); | |
371 | if (root != 0) { | |
372 | /* assume pmac unless proven to be chrp -- Cort */ | |
373 | _machine = _MACH_Pmac; | |
374 | model = get_property(root, "device_type", NULL); | |
375 | if (model && !strncmp("chrp", model, 4)) | |
376 | _machine = _MACH_chrp; | |
377 | else { | |
378 | model = get_property(root, "model", NULL); | |
379 | if (model && !strncmp(model, "IBM", 3)) | |
380 | _machine = _MACH_chrp; | |
381 | } | |
382 | } | |
383 | } | |
384 | #endif | |
385 | ||
386 | #ifdef CONFIG_PPC_MULTIPLATFORM | |
387 | /* | |
388 | * The PPC_MULTIPLATFORM version of platform_init... | |
389 | */ | |
390 | void __init | |
391 | platform_init(unsigned long r3, unsigned long r4, unsigned long r5, | |
392 | unsigned long r6, unsigned long r7) | |
393 | { | |
394 | #ifdef CONFIG_BOOTX_TEXT | |
395 | if (boot_text_mapped) { | |
396 | btext_clearscreen(); | |
397 | btext_welcome(); | |
398 | } | |
399 | #endif | |
400 | ||
401 | parse_bootinfo(find_bootinfo()); | |
402 | ||
403 | /* if we didn't get any bootinfo telling us what we are... */ | |
404 | if (_machine == 0) { | |
405 | /* prep boot loader tells us if we're prep or not */ | |
406 | if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) ) | |
407 | _machine = _MACH_prep; | |
408 | } | |
409 | ||
14cf11af | 410 | #ifdef CONFIG_PPC_PREP |
1da177e4 LT |
411 | /* not much more to do here, if prep */ |
412 | if (_machine == _MACH_prep) { | |
413 | prep_init(r3, r4, r5, r6, r7); | |
414 | return; | |
415 | } | |
14cf11af | 416 | #endif |
1da177e4 LT |
417 | |
418 | /* prom_init has already been called from __start */ | |
419 | if (boot_infos) | |
420 | relocate_nodes(); | |
421 | ||
422 | /* If we aren't PReP, we can find out if we're Pmac | |
423 | * or CHRP with this. */ | |
424 | if (_machine == 0) | |
425 | intuit_machine_type(); | |
426 | ||
427 | /* finish_device_tree may need _machine defined. */ | |
428 | finish_device_tree(); | |
429 | ||
430 | /* | |
431 | * If we were booted via quik, r3 points to the physical | |
432 | * address of the command-line parameters. | |
433 | * If we were booted from an xcoff image (i.e. netbooted or | |
434 | * booted from floppy), we get the command line from the | |
435 | * bootargs property of the /chosen node. | |
436 | * If an initial ramdisk is present, r3 and r4 | |
437 | * are used for initrd_start and initrd_size, | |
438 | * otherwise they contain 0xdeadbeef. | |
439 | */ | |
440 | if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) { | |
441 | strlcpy(cmd_line, (char *)r3 + KERNELBASE, | |
442 | sizeof(cmd_line)); | |
443 | } else if (boot_infos != 0) { | |
444 | /* booted by BootX - check for ramdisk */ | |
445 | if (boot_infos->kernelParamsOffset != 0) | |
446 | strlcpy(cmd_line, (char *) boot_infos | |
447 | + boot_infos->kernelParamsOffset, | |
448 | sizeof(cmd_line)); | |
449 | #ifdef CONFIG_BLK_DEV_INITRD | |
450 | if (boot_infos->ramDisk) { | |
451 | initrd_start = (unsigned long) boot_infos | |
452 | + boot_infos->ramDisk; | |
453 | initrd_end = initrd_start + boot_infos->ramDiskSize; | |
454 | initrd_below_start_ok = 1; | |
455 | } | |
456 | #endif | |
457 | } else { | |
458 | struct device_node *chosen; | |
459 | char *p; | |
460 | ||
461 | #ifdef CONFIG_BLK_DEV_INITRD | |
462 | if (r3 && r4 && r4 != 0xdeadbeef) { | |
463 | if (r3 < KERNELBASE) | |
464 | r3 += KERNELBASE; | |
465 | initrd_start = r3; | |
466 | initrd_end = r3 + r4; | |
467 | ROOT_DEV = Root_RAM0; | |
468 | initrd_below_start_ok = 1; | |
469 | } | |
470 | #endif | |
471 | chosen = find_devices("chosen"); | |
472 | if (chosen != NULL) { | |
473 | p = get_property(chosen, "bootargs", NULL); | |
474 | if (p && *p) { | |
475 | strlcpy(cmd_line, p, sizeof(cmd_line)); | |
476 | } | |
477 | } | |
478 | } | |
479 | #ifdef CONFIG_ADB | |
480 | if (strstr(cmd_line, "adb_sync")) { | |
481 | extern int __adb_probe_sync; | |
482 | __adb_probe_sync = 1; | |
483 | } | |
484 | #endif /* CONFIG_ADB */ | |
485 | ||
486 | switch (_machine) { | |
14cf11af | 487 | #ifdef CONFIG_PPC_PMAC |
1da177e4 LT |
488 | case _MACH_Pmac: |
489 | pmac_init(r3, r4, r5, r6, r7); | |
490 | break; | |
14cf11af PM |
491 | #endif |
492 | #ifdef CONFIG_PPC_CHRP | |
1da177e4 LT |
493 | case _MACH_chrp: |
494 | chrp_init(r3, r4, r5, r6, r7); | |
495 | break; | |
14cf11af | 496 | #endif |
1da177e4 LT |
497 | } |
498 | } | |
499 | ||
500 | #ifdef CONFIG_SERIAL_CORE_CONSOLE | |
501 | extern char *of_stdout_device; | |
502 | ||
503 | static int __init set_preferred_console(void) | |
504 | { | |
505 | struct device_node *prom_stdout; | |
506 | char *name; | |
45fed46f | 507 | int offset = 0; |
1da177e4 LT |
508 | |
509 | if (of_stdout_device == NULL) | |
510 | return -ENODEV; | |
511 | ||
512 | /* The user has requested a console so this is already set up. */ | |
513 | if (strstr(saved_command_line, "console=")) | |
514 | return -EBUSY; | |
515 | ||
516 | prom_stdout = find_path_device(of_stdout_device); | |
517 | if (!prom_stdout) | |
518 | return -ENODEV; | |
519 | ||
520 | name = (char *)get_property(prom_stdout, "name", NULL); | |
521 | if (!name) | |
522 | return -ENODEV; | |
523 | ||
524 | if (strcmp(name, "serial") == 0) { | |
525 | int i; | |
526 | u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i); | |
527 | if (i > 8) { | |
528 | switch (reg[1]) { | |
529 | case 0x3f8: | |
530 | offset = 0; | |
531 | break; | |
532 | case 0x2f8: | |
533 | offset = 1; | |
534 | break; | |
535 | case 0x898: | |
536 | offset = 2; | |
537 | break; | |
538 | case 0x890: | |
539 | offset = 3; | |
540 | break; | |
541 | default: | |
542 | /* We dont recognise the serial port */ | |
543 | return -ENODEV; | |
544 | } | |
545 | } | |
546 | } else if (strcmp(name, "ch-a") == 0) | |
547 | offset = 0; | |
548 | else if (strcmp(name, "ch-b") == 0) | |
549 | offset = 1; | |
550 | else | |
551 | return -ENODEV; | |
552 | return add_preferred_console("ttyS", offset, NULL); | |
553 | } | |
554 | console_initcall(set_preferred_console); | |
555 | #endif /* CONFIG_SERIAL_CORE_CONSOLE */ | |
556 | #endif /* CONFIG_PPC_MULTIPLATFORM */ | |
557 | ||
558 | struct bi_record *find_bootinfo(void) | |
559 | { | |
560 | struct bi_record *rec; | |
561 | ||
562 | rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20)); | |
563 | if ( rec->tag != BI_FIRST ) { | |
564 | /* | |
565 | * This 0x10000 offset is a terrible hack but it will go away when | |
566 | * we have the bootloader handle all the relocation and | |
567 | * prom calls -- Cort | |
568 | */ | |
569 | rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20)); | |
570 | if ( rec->tag != BI_FIRST ) | |
571 | return NULL; | |
572 | } | |
573 | return rec; | |
574 | } | |
575 | ||
576 | void parse_bootinfo(struct bi_record *rec) | |
577 | { | |
578 | if (rec == NULL || rec->tag != BI_FIRST) | |
579 | return; | |
580 | while (rec->tag != BI_LAST) { | |
581 | ulong *data = rec->data; | |
582 | switch (rec->tag) { | |
583 | case BI_CMD_LINE: | |
584 | strlcpy(cmd_line, (void *)data, sizeof(cmd_line)); | |
585 | break; | |
1da177e4 LT |
586 | #ifdef CONFIG_BLK_DEV_INITRD |
587 | case BI_INITRD: | |
588 | initrd_start = data[0] + KERNELBASE; | |
589 | initrd_end = data[0] + data[1] + KERNELBASE; | |
590 | break; | |
591 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
592 | #ifdef CONFIG_PPC_MULTIPLATFORM | |
593 | case BI_MACHTYPE: | |
594 | _machine = data[0]; | |
595 | break; | |
596 | #endif | |
597 | case BI_MEMSIZE: | |
598 | boot_mem_size = data[0]; | |
599 | break; | |
600 | } | |
601 | rec = (struct bi_record *)((ulong)rec + rec->size); | |
602 | } | |
603 | } | |
604 | ||
605 | /* | |
606 | * Find out what kind of machine we're on and save any data we need | |
607 | * from the early boot process (devtree is copied on pmac by prom_init()). | |
608 | * This is called very early on the boot process, after a minimal | |
609 | * MMU environment has been set up but before MMU_init is called. | |
610 | */ | |
611 | void __init | |
612 | machine_init(unsigned long r3, unsigned long r4, unsigned long r5, | |
613 | unsigned long r6, unsigned long r7) | |
614 | { | |
615 | #ifdef CONFIG_CMDLINE | |
616 | strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line)); | |
617 | #endif /* CONFIG_CMDLINE */ | |
618 | ||
619 | #ifdef CONFIG_6xx | |
620 | ppc_md.power_save = ppc6xx_idle; | |
621 | #endif | |
622 | #ifdef CONFIG_POWER4 | |
623 | ppc_md.power_save = power4_idle; | |
624 | #endif | |
625 | ||
626 | platform_init(r3, r4, r5, r6, r7); | |
627 | ||
628 | if (ppc_md.progress) | |
629 | ppc_md.progress("id mach(): done", 0x200); | |
630 | } | |
a2f40ccd KG |
631 | #ifdef CONFIG_BOOKE_WDT |
632 | /* Checks wdt=x and wdt_period=xx command-line option */ | |
633 | int __init early_parse_wdt(char *p) | |
634 | { | |
a2f40ccd | 635 | if (p && strncmp(p, "0", 1) != 0) |
39cdc4bf | 636 | booke_wdt_enabled = 1; |
a2f40ccd KG |
637 | |
638 | return 0; | |
639 | } | |
640 | early_param("wdt", early_parse_wdt); | |
641 | ||
642 | int __init early_parse_wdt_period (char *p) | |
643 | { | |
a2f40ccd | 644 | if (p) |
39cdc4bf | 645 | booke_wdt_period = simple_strtoul(p, NULL, 0); |
a2f40ccd KG |
646 | |
647 | return 0; | |
648 | } | |
649 | early_param("wdt_period", early_parse_wdt_period); | |
650 | #endif /* CONFIG_BOOKE_WDT */ | |
1da177e4 LT |
651 | |
652 | /* Checks "l2cr=xxxx" command-line option */ | |
653 | int __init ppc_setup_l2cr(char *str) | |
654 | { | |
655 | if (cpu_has_feature(CPU_FTR_L2CR)) { | |
656 | unsigned long val = simple_strtoul(str, NULL, 0); | |
657 | printk(KERN_INFO "l2cr set to %lx\n", val); | |
658 | _set_L2CR(0); /* force invalidate by disable cache */ | |
659 | _set_L2CR(val); /* and enable it */ | |
660 | } | |
661 | return 1; | |
662 | } | |
663 | __setup("l2cr=", ppc_setup_l2cr); | |
664 | ||
665 | #ifdef CONFIG_GENERIC_NVRAM | |
666 | ||
667 | /* Generic nvram hooks used by drivers/char/gen_nvram.c */ | |
668 | unsigned char nvram_read_byte(int addr) | |
669 | { | |
670 | if (ppc_md.nvram_read_val) | |
671 | return ppc_md.nvram_read_val(addr); | |
672 | return 0xff; | |
673 | } | |
674 | EXPORT_SYMBOL(nvram_read_byte); | |
675 | ||
676 | void nvram_write_byte(unsigned char val, int addr) | |
677 | { | |
678 | if (ppc_md.nvram_write_val) | |
679 | ppc_md.nvram_write_val(addr, val); | |
680 | } | |
681 | EXPORT_SYMBOL(nvram_write_byte); | |
682 | ||
683 | void nvram_sync(void) | |
684 | { | |
685 | if (ppc_md.nvram_sync) | |
686 | ppc_md.nvram_sync(); | |
687 | } | |
688 | EXPORT_SYMBOL(nvram_sync); | |
689 | ||
690 | #endif /* CONFIG_NVRAM */ | |
691 | ||
692 | static struct cpu cpu_devices[NR_CPUS]; | |
693 | ||
694 | int __init ppc_init(void) | |
695 | { | |
696 | int i; | |
697 | ||
698 | /* clear the progress line */ | |
699 | if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff); | |
700 | ||
701 | /* register CPU devices */ | |
702 | for (i = 0; i < NR_CPUS; i++) | |
703 | if (cpu_possible(i)) | |
704 | register_cpu(&cpu_devices[i], i, NULL); | |
705 | ||
706 | /* call platform init */ | |
707 | if (ppc_md.init != NULL) { | |
708 | ppc_md.init(); | |
709 | } | |
710 | return 0; | |
711 | } | |
712 | ||
713 | arch_initcall(ppc_init); | |
714 | ||
715 | /* Warning, IO base is not yet inited */ | |
716 | void __init setup_arch(char **cmdline_p) | |
717 | { | |
718 | extern char *klimit; | |
719 | extern void do_init_bootmem(void); | |
720 | ||
721 | /* so udelay does something sensible, assume <= 1000 bogomips */ | |
722 | loops_per_jiffy = 500000000 / HZ; | |
723 | ||
724 | #ifdef CONFIG_PPC_MULTIPLATFORM | |
725 | /* This could be called "early setup arch", it must be done | |
726 | * now because xmon need it | |
727 | */ | |
728 | if (_machine == _MACH_Pmac) | |
729 | pmac_feature_init(); /* New cool way */ | |
730 | #endif | |
731 | ||
732 | #ifdef CONFIG_XMON | |
733 | xmon_map_scc(); | |
734 | if (strstr(cmd_line, "xmon")) | |
735 | xmon(NULL); | |
736 | #endif /* CONFIG_XMON */ | |
737 | if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab); | |
738 | ||
739 | #if defined(CONFIG_KGDB) | |
740 | if (ppc_md.kgdb_map_scc) | |
741 | ppc_md.kgdb_map_scc(); | |
742 | set_debug_traps(); | |
743 | if (strstr(cmd_line, "gdb")) { | |
744 | if (ppc_md.progress) | |
745 | ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000); | |
746 | printk("kgdb breakpoint activated\n"); | |
747 | breakpoint(); | |
748 | } | |
749 | #endif | |
750 | ||
751 | /* | |
752 | * Set cache line size based on type of cpu as a default. | |
753 | * Systems with OF can look in the properties on the cpu node(s) | |
754 | * for a possibly more accurate value. | |
755 | */ | |
756 | if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) { | |
757 | dcache_bsize = cur_cpu_spec[0]->dcache_bsize; | |
758 | icache_bsize = cur_cpu_spec[0]->icache_bsize; | |
759 | ucache_bsize = 0; | |
760 | } else | |
761 | ucache_bsize = dcache_bsize = icache_bsize | |
762 | = cur_cpu_spec[0]->dcache_bsize; | |
763 | ||
764 | /* reboot on panic */ | |
765 | panic_timeout = 180; | |
766 | ||
767 | init_mm.start_code = PAGE_OFFSET; | |
768 | init_mm.end_code = (unsigned long) _etext; | |
769 | init_mm.end_data = (unsigned long) _edata; | |
770 | init_mm.brk = (unsigned long) klimit; | |
771 | ||
772 | /* Save unparsed command line copy for /proc/cmdline */ | |
773 | strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); | |
774 | *cmdline_p = cmd_line; | |
775 | ||
19bbdf0e PM |
776 | parse_early_param(); |
777 | ||
1da177e4 LT |
778 | /* set up the bootmem stuff with available memory */ |
779 | do_init_bootmem(); | |
780 | if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab); | |
781 | ||
782 | #ifdef CONFIG_PPC_OCP | |
783 | /* Initialize OCP device list */ | |
784 | ocp_early_init(); | |
785 | if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab); | |
786 | #endif | |
787 | ||
788 | #ifdef CONFIG_DUMMY_CONSOLE | |
789 | conswitchp = &dummy_con; | |
790 | #endif | |
791 | ||
792 | ppc_md.setup_arch(); | |
793 | if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab); | |
794 | ||
795 | paging_init(); | |
796 | ||
797 | /* this is for modules since _machine can be a define -- Cort */ | |
798 | ppc_md.ppc_machine = _machine; | |
799 | } |