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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * arch/s390/kernel/setup.c | |
3 | * | |
4 | * S390 version | |
5 | * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
6 | * Author(s): Hartmut Penner (hp@de.ibm.com), | |
7 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
8 | * | |
9 | * Derived from "arch/i386/kernel/setup.c" | |
10 | * Copyright (C) 1995, Linus Torvalds | |
11 | */ | |
12 | ||
13 | /* | |
14 | * This file handles the architecture-dependent parts of initialization | |
15 | */ | |
16 | ||
17 | #include <linux/errno.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/sched.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/stddef.h> | |
23 | #include <linux/unistd.h> | |
24 | #include <linux/ptrace.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/user.h> | |
27 | #include <linux/a.out.h> | |
28 | #include <linux/tty.h> | |
29 | #include <linux/ioport.h> | |
30 | #include <linux/delay.h> | |
1da177e4 LT |
31 | #include <linux/init.h> |
32 | #include <linux/initrd.h> | |
33 | #include <linux/bootmem.h> | |
34 | #include <linux/root_dev.h> | |
35 | #include <linux/console.h> | |
36 | #include <linux/seq_file.h> | |
37 | #include <linux/kernel_stat.h> | |
1e8e3383 | 38 | #include <linux/device.h> |
585c3047 | 39 | #include <linux/notifier.h> |
65912a84 | 40 | #include <linux/pfn.h> |
1da177e4 LT |
41 | |
42 | #include <asm/uaccess.h> | |
43 | #include <asm/system.h> | |
44 | #include <asm/smp.h> | |
45 | #include <asm/mmu_context.h> | |
46 | #include <asm/cpcmd.h> | |
47 | #include <asm/lowcore.h> | |
48 | #include <asm/irq.h> | |
0b642ede PO |
49 | #include <asm/page.h> |
50 | #include <asm/ptrace.h> | |
cc13ad62 | 51 | #include <asm/sections.h> |
1da177e4 | 52 | |
d02765d1 GS |
53 | /* |
54 | * User copy operations. | |
55 | */ | |
56 | struct uaccess_ops uaccess; | |
57 | EXPORT_SYMBOL_GPL(uaccess); | |
58 | ||
1da177e4 LT |
59 | /* |
60 | * Machine setup.. | |
61 | */ | |
62 | unsigned int console_mode = 0; | |
63 | unsigned int console_devno = -1; | |
64 | unsigned int console_irq = -1; | |
1da177e4 | 65 | unsigned long machine_flags = 0; |
36a2bd42 | 66 | |
f4eb07c1 | 67 | struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
1da177e4 | 68 | volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ |
bcc8bcb1 | 69 | unsigned long __initdata zholes_size[MAX_NR_ZONES]; |
c9e37353 | 70 | static unsigned long __initdata memory_end; |
1da177e4 | 71 | |
1da177e4 LT |
72 | /* |
73 | * This is set up by the setup-routine at boot-time | |
74 | * for S390 need to find out, what we have to setup | |
75 | * using address 0x10400 ... | |
76 | */ | |
77 | ||
78 | #include <asm/setup.h> | |
79 | ||
1da177e4 LT |
80 | static struct resource code_resource = { |
81 | .name = "Kernel code", | |
82 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
83 | }; | |
84 | ||
85 | static struct resource data_resource = { | |
86 | .name = "Kernel data", | |
87 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
88 | }; | |
89 | ||
90 | /* | |
91 | * cpu_init() initializes state that is per-CPU. | |
92 | */ | |
93 | void __devinit cpu_init (void) | |
94 | { | |
95 | int addr = hard_smp_processor_id(); | |
96 | ||
97 | /* | |
98 | * Store processor id in lowcore (used e.g. in timer_interrupt) | |
99 | */ | |
94c12cc7 | 100 | asm volatile("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id)); |
1da177e4 LT |
101 | S390_lowcore.cpu_data.cpu_addr = addr; |
102 | ||
103 | /* | |
104 | * Force FPU initialization: | |
105 | */ | |
106 | clear_thread_flag(TIF_USEDFPU); | |
107 | clear_used_math(); | |
108 | ||
109 | atomic_inc(&init_mm.mm_count); | |
110 | current->active_mm = &init_mm; | |
111 | if (current->mm) | |
112 | BUG(); | |
113 | enter_lazy_tlb(&init_mm, current); | |
114 | } | |
115 | ||
116 | /* | |
117 | * VM halt and poweroff setup routines | |
118 | */ | |
119 | char vmhalt_cmd[128] = ""; | |
120 | char vmpoff_cmd[128] = ""; | |
585c3047 | 121 | char vmpanic_cmd[128] = ""; |
1da177e4 LT |
122 | |
123 | static inline void strncpy_skip_quote(char *dst, char *src, int n) | |
124 | { | |
125 | int sx, dx; | |
126 | ||
127 | dx = 0; | |
128 | for (sx = 0; src[sx] != 0; sx++) { | |
129 | if (src[sx] == '"') continue; | |
130 | dst[dx++] = src[sx]; | |
131 | if (dx >= n) break; | |
132 | } | |
133 | } | |
134 | ||
135 | static int __init vmhalt_setup(char *str) | |
136 | { | |
137 | strncpy_skip_quote(vmhalt_cmd, str, 127); | |
138 | vmhalt_cmd[127] = 0; | |
139 | return 1; | |
140 | } | |
141 | ||
142 | __setup("vmhalt=", vmhalt_setup); | |
143 | ||
144 | static int __init vmpoff_setup(char *str) | |
145 | { | |
146 | strncpy_skip_quote(vmpoff_cmd, str, 127); | |
147 | vmpoff_cmd[127] = 0; | |
148 | return 1; | |
149 | } | |
150 | ||
151 | __setup("vmpoff=", vmpoff_setup); | |
152 | ||
585c3047 PO |
153 | static int vmpanic_notify(struct notifier_block *self, unsigned long event, |
154 | void *data) | |
155 | { | |
156 | if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0) | |
157 | cpcmd(vmpanic_cmd, NULL, 0, NULL); | |
158 | ||
159 | return NOTIFY_OK; | |
160 | } | |
161 | ||
162 | #define PANIC_PRI_VMPANIC 0 | |
163 | ||
164 | static struct notifier_block vmpanic_nb = { | |
165 | .notifier_call = vmpanic_notify, | |
166 | .priority = PANIC_PRI_VMPANIC | |
167 | }; | |
168 | ||
169 | static int __init vmpanic_setup(char *str) | |
170 | { | |
171 | static int register_done __initdata = 0; | |
172 | ||
173 | strncpy_skip_quote(vmpanic_cmd, str, 127); | |
174 | vmpanic_cmd[127] = 0; | |
175 | if (!register_done) { | |
176 | register_done = 1; | |
177 | atomic_notifier_chain_register(&panic_notifier_list, | |
178 | &vmpanic_nb); | |
179 | } | |
180 | return 1; | |
181 | } | |
182 | ||
183 | __setup("vmpanic=", vmpanic_setup); | |
184 | ||
1da177e4 LT |
185 | /* |
186 | * condev= and conmode= setup parameter. | |
187 | */ | |
188 | ||
189 | static int __init condev_setup(char *str) | |
190 | { | |
191 | int vdev; | |
192 | ||
193 | vdev = simple_strtoul(str, &str, 0); | |
194 | if (vdev >= 0 && vdev < 65536) { | |
195 | console_devno = vdev; | |
196 | console_irq = -1; | |
197 | } | |
198 | return 1; | |
199 | } | |
200 | ||
201 | __setup("condev=", condev_setup); | |
202 | ||
203 | static int __init conmode_setup(char *str) | |
204 | { | |
205 | #if defined(CONFIG_SCLP_CONSOLE) | |
206 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) | |
207 | SET_CONSOLE_SCLP; | |
208 | #endif | |
209 | #if defined(CONFIG_TN3215_CONSOLE) | |
210 | if (strncmp(str, "3215", 5) == 0) | |
211 | SET_CONSOLE_3215; | |
212 | #endif | |
213 | #if defined(CONFIG_TN3270_CONSOLE) | |
214 | if (strncmp(str, "3270", 5) == 0) | |
215 | SET_CONSOLE_3270; | |
216 | #endif | |
217 | return 1; | |
218 | } | |
219 | ||
220 | __setup("conmode=", conmode_setup); | |
221 | ||
222 | static void __init conmode_default(void) | |
223 | { | |
224 | char query_buffer[1024]; | |
225 | char *ptr; | |
226 | ||
227 | if (MACHINE_IS_VM) { | |
740b5706 | 228 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
229 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
230 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
231 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
740b5706 | 232 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
233 | ptr = strstr(query_buffer, "CONMODE"); |
234 | /* | |
235 | * Set the conmode to 3215 so that the device recognition | |
236 | * will set the cu_type of the console to 3215. If the | |
237 | * conmode is 3270 and we don't set it back then both | |
238 | * 3215 and the 3270 driver will try to access the console | |
239 | * device (3215 as console and 3270 as normal tty). | |
240 | */ | |
740b5706 | 241 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 LT |
242 | if (ptr == NULL) { |
243 | #if defined(CONFIG_SCLP_CONSOLE) | |
244 | SET_CONSOLE_SCLP; | |
245 | #endif | |
246 | return; | |
247 | } | |
248 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
249 | #if defined(CONFIG_TN3270_CONSOLE) | |
250 | SET_CONSOLE_3270; | |
251 | #elif defined(CONFIG_TN3215_CONSOLE) | |
252 | SET_CONSOLE_3215; | |
253 | #elif defined(CONFIG_SCLP_CONSOLE) | |
254 | SET_CONSOLE_SCLP; | |
255 | #endif | |
256 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
257 | #if defined(CONFIG_TN3215_CONSOLE) | |
258 | SET_CONSOLE_3215; | |
259 | #elif defined(CONFIG_TN3270_CONSOLE) | |
260 | SET_CONSOLE_3270; | |
261 | #elif defined(CONFIG_SCLP_CONSOLE) | |
262 | SET_CONSOLE_SCLP; | |
263 | #endif | |
264 | } | |
265 | } else if (MACHINE_IS_P390) { | |
266 | #if defined(CONFIG_TN3215_CONSOLE) | |
267 | SET_CONSOLE_3215; | |
268 | #elif defined(CONFIG_TN3270_CONSOLE) | |
269 | SET_CONSOLE_3270; | |
270 | #endif | |
271 | } else { | |
272 | #if defined(CONFIG_SCLP_CONSOLE) | |
273 | SET_CONSOLE_SCLP; | |
274 | #endif | |
275 | } | |
276 | } | |
277 | ||
278 | #ifdef CONFIG_SMP | |
279 | extern void machine_restart_smp(char *); | |
280 | extern void machine_halt_smp(void); | |
281 | extern void machine_power_off_smp(void); | |
282 | ||
283 | void (*_machine_restart)(char *command) = machine_restart_smp; | |
284 | void (*_machine_halt)(void) = machine_halt_smp; | |
285 | void (*_machine_power_off)(void) = machine_power_off_smp; | |
286 | #else | |
287 | /* | |
288 | * Reboot, halt and power_off routines for non SMP. | |
289 | */ | |
1da177e4 LT |
290 | static void do_machine_restart_nonsmp(char * __unused) |
291 | { | |
ff6b8ea6 | 292 | do_reipl(); |
1da177e4 LT |
293 | } |
294 | ||
295 | static void do_machine_halt_nonsmp(void) | |
296 | { | |
297 | if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) | |
740b5706 | 298 | __cpcmd(vmhalt_cmd, NULL, 0, NULL); |
1da177e4 LT |
299 | signal_processor(smp_processor_id(), sigp_stop_and_store_status); |
300 | } | |
301 | ||
302 | static void do_machine_power_off_nonsmp(void) | |
303 | { | |
304 | if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) | |
740b5706 | 305 | __cpcmd(vmpoff_cmd, NULL, 0, NULL); |
1da177e4 LT |
306 | signal_processor(smp_processor_id(), sigp_stop_and_store_status); |
307 | } | |
308 | ||
309 | void (*_machine_restart)(char *command) = do_machine_restart_nonsmp; | |
310 | void (*_machine_halt)(void) = do_machine_halt_nonsmp; | |
311 | void (*_machine_power_off)(void) = do_machine_power_off_nonsmp; | |
312 | #endif | |
313 | ||
314 | /* | |
315 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
316 | * _machine_halt or _machine_power_off. | |
317 | */ | |
318 | ||
319 | void machine_restart(char *command) | |
320 | { | |
06fa46a2 MS |
321 | if (!in_interrupt() || oops_in_progress) |
322 | /* | |
323 | * Only unblank the console if we are called in enabled | |
324 | * context or a bust_spinlocks cleared the way for us. | |
325 | */ | |
326 | console_unblank(); | |
1da177e4 LT |
327 | _machine_restart(command); |
328 | } | |
329 | ||
1da177e4 LT |
330 | void machine_halt(void) |
331 | { | |
06fa46a2 MS |
332 | if (!in_interrupt() || oops_in_progress) |
333 | /* | |
334 | * Only unblank the console if we are called in enabled | |
335 | * context or a bust_spinlocks cleared the way for us. | |
336 | */ | |
337 | console_unblank(); | |
1da177e4 LT |
338 | _machine_halt(); |
339 | } | |
340 | ||
1da177e4 LT |
341 | void machine_power_off(void) |
342 | { | |
06fa46a2 MS |
343 | if (!in_interrupt() || oops_in_progress) |
344 | /* | |
345 | * Only unblank the console if we are called in enabled | |
346 | * context or a bust_spinlocks cleared the way for us. | |
347 | */ | |
348 | console_unblank(); | |
1da177e4 LT |
349 | _machine_power_off(); |
350 | } | |
351 | ||
53df751c MS |
352 | /* |
353 | * Dummy power off function. | |
354 | */ | |
355 | void (*pm_power_off)(void) = machine_power_off; | |
356 | ||
bcc8bcb1 HC |
357 | static void __init |
358 | add_memory_hole(unsigned long start, unsigned long end) | |
359 | { | |
360 | unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT; | |
361 | ||
362 | if (end <= dma_pfn) | |
363 | zholes_size[ZONE_DMA] += end - start + 1; | |
364 | else if (start > dma_pfn) | |
365 | zholes_size[ZONE_NORMAL] += end - start + 1; | |
366 | else { | |
367 | zholes_size[ZONE_DMA] += dma_pfn - start + 1; | |
368 | zholes_size[ZONE_NORMAL] += end - dma_pfn; | |
369 | } | |
370 | } | |
371 | ||
59685296 HC |
372 | static int __init early_parse_mem(char *p) |
373 | { | |
374 | memory_end = memparse(p, &p); | |
375 | return 0; | |
376 | } | |
377 | early_param("mem", early_parse_mem); | |
378 | ||
379 | /* | |
380 | * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes | |
381 | */ | |
382 | static int __init early_parse_ipldelay(char *p) | |
c9e37353 | 383 | { |
c9e37353 | 384 | unsigned long delay = 0; |
1da177e4 | 385 | |
59685296 | 386 | delay = simple_strtoul(p, &p, 0); |
1da177e4 | 387 | |
59685296 HC |
388 | switch (*p) { |
389 | case 's': | |
390 | case 'S': | |
391 | delay *= 1000000; | |
392 | break; | |
393 | case 'm': | |
394 | case 'M': | |
395 | delay *= 60 * 1000000; | |
c9e37353 | 396 | } |
59685296 HC |
397 | |
398 | /* now wait for the requested amount of time */ | |
399 | udelay(delay); | |
400 | ||
401 | return 0; | |
c9e37353 | 402 | } |
59685296 | 403 | early_param("ipldelay", early_parse_ipldelay); |
c9e37353 HC |
404 | |
405 | static void __init | |
406 | setup_lowcore(void) | |
407 | { | |
408 | struct _lowcore *lc; | |
409 | int lc_pages; | |
410 | ||
411 | /* | |
412 | * Setup lowcore for boot cpu | |
413 | */ | |
414 | lc_pages = sizeof(void *) == 8 ? 2 : 1; | |
415 | lc = (struct _lowcore *) | |
416 | __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); | |
417 | memset(lc, 0, lc_pages * PAGE_SIZE); | |
0b642ede | 418 | lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; |
c9e37353 HC |
419 | lc->restart_psw.addr = |
420 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; | |
421 | lc->external_new_psw.mask = PSW_KERNEL_BITS; | |
422 | lc->external_new_psw.addr = | |
423 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
424 | lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT; | |
425 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; | |
426 | lc->program_new_psw.mask = PSW_KERNEL_BITS; | |
427 | lc->program_new_psw.addr = | |
428 | PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; | |
77fa2245 HC |
429 | lc->mcck_new_psw.mask = |
430 | PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; | |
c9e37353 HC |
431 | lc->mcck_new_psw.addr = |
432 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
433 | lc->io_new_psw.mask = PSW_KERNEL_BITS; | |
434 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; | |
435 | lc->ipl_device = S390_lowcore.ipl_device; | |
436 | lc->jiffy_timer = -1LL; | |
437 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; | |
438 | lc->async_stack = (unsigned long) | |
439 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; | |
c9e37353 HC |
440 | lc->panic_stack = (unsigned long) |
441 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; | |
c9e37353 HC |
442 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
443 | lc->thread_info = (unsigned long) &init_thread_union; | |
347a8dc3 | 444 | #ifndef CONFIG_64BIT |
77fa2245 HC |
445 | if (MACHINE_HAS_IEEE) { |
446 | lc->extended_save_area_addr = (__u32) | |
447 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0); | |
448 | /* enable extended save area */ | |
c4972f33 | 449 | __ctl_set_bit(14, 29); |
77fa2245 HC |
450 | } |
451 | #endif | |
c9e37353 HC |
452 | set_prefix((u32)(unsigned long) lc); |
453 | } | |
454 | ||
455 | static void __init | |
456 | setup_resources(void) | |
457 | { | |
458 | struct resource *res; | |
459 | int i; | |
460 | ||
cc13ad62 HC |
461 | code_resource.start = (unsigned long) &_text; |
462 | code_resource.end = (unsigned long) &_etext - 1; | |
463 | data_resource.start = (unsigned long) &_etext; | |
464 | data_resource.end = (unsigned long) &_edata - 1; | |
465 | ||
c9e37353 HC |
466 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
467 | res = alloc_bootmem_low(sizeof(struct resource)); | |
468 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; | |
469 | switch (memory_chunk[i].type) { | |
470 | case CHUNK_READ_WRITE: | |
471 | res->name = "System RAM"; | |
472 | break; | |
473 | case CHUNK_READ_ONLY: | |
474 | res->name = "System ROM"; | |
475 | res->flags |= IORESOURCE_READONLY; | |
476 | break; | |
477 | default: | |
478 | res->name = "reserved"; | |
479 | } | |
480 | res->start = memory_chunk[i].addr; | |
481 | res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; | |
482 | request_resource(&iomem_resource, res); | |
483 | request_resource(res, &code_resource); | |
484 | request_resource(res, &data_resource); | |
485 | } | |
486 | } | |
487 | ||
8b62bc96 HC |
488 | static void __init setup_memory_end(void) |
489 | { | |
490 | unsigned long real_size, memory_size; | |
491 | unsigned long max_mem, max_phys; | |
492 | int i; | |
493 | ||
494 | memory_size = real_size = 0; | |
495 | max_phys = VMALLOC_END - VMALLOC_MIN_SIZE; | |
496 | memory_end &= PAGE_MASK; | |
497 | ||
498 | max_mem = memory_end ? min(max_phys, memory_end) : max_phys; | |
499 | ||
500 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
501 | struct mem_chunk *chunk = &memory_chunk[i]; | |
502 | ||
503 | real_size = max(real_size, chunk->addr + chunk->size); | |
504 | if (chunk->addr >= max_mem) { | |
505 | memset(chunk, 0, sizeof(*chunk)); | |
506 | continue; | |
507 | } | |
508 | if (chunk->addr + chunk->size > max_mem) | |
509 | chunk->size = max_mem - chunk->addr; | |
510 | memory_size = max(memory_size, chunk->addr + chunk->size); | |
511 | } | |
512 | if (!memory_end) | |
513 | memory_end = memory_size; | |
514 | if (real_size > memory_end) | |
515 | printk("More memory detected than supported. Unused: %luk\n", | |
516 | (real_size - memory_end) >> 10); | |
517 | } | |
518 | ||
c9e37353 HC |
519 | static void __init |
520 | setup_memory(void) | |
521 | { | |
522 | unsigned long bootmap_size; | |
0b642ede | 523 | unsigned long start_pfn, end_pfn, init_pfn; |
bcc8bcb1 | 524 | unsigned long last_rw_end; |
c9e37353 | 525 | int i; |
1da177e4 LT |
526 | |
527 | /* | |
528 | * partially used pages are not usable - thus | |
529 | * we are rounding upwards: | |
530 | */ | |
65912a84 HC |
531 | start_pfn = PFN_UP(__pa(&_end)); |
532 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 533 | |
0b642ede PO |
534 | /* Initialize storage key for kernel pages */ |
535 | for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++) | |
536 | page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY); | |
537 | ||
65912a84 HC |
538 | #ifdef CONFIG_BLK_DEV_INITRD |
539 | /* | |
540 | * Move the initrd in case the bitmap of the bootmem allocater | |
541 | * would overwrite it. | |
542 | */ | |
543 | ||
544 | if (INITRD_START && INITRD_SIZE) { | |
545 | unsigned long bmap_size; | |
546 | unsigned long start; | |
547 | ||
548 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
549 | bmap_size = PFN_PHYS(bmap_size); | |
550 | ||
551 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
552 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
553 | ||
554 | if (start + INITRD_SIZE > memory_end) { | |
555 | printk("initrd extends beyond end of memory " | |
556 | "(0x%08lx > 0x%08lx)\n" | |
557 | "disabling initrd\n", | |
558 | start + INITRD_SIZE, memory_end); | |
559 | INITRD_START = INITRD_SIZE = 0; | |
560 | } else { | |
561 | printk("Moving initrd (0x%08lx -> 0x%08lx, " | |
562 | "size: %ld)\n", | |
563 | INITRD_START, start, INITRD_SIZE); | |
564 | memmove((void *) start, (void *) INITRD_START, | |
565 | INITRD_SIZE); | |
566 | INITRD_START = start; | |
567 | } | |
568 | } | |
569 | } | |
570 | #endif | |
571 | ||
1da177e4 | 572 | /* |
7676bef9 | 573 | * Initialize the boot-time allocator |
1da177e4 LT |
574 | */ |
575 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
576 | ||
577 | /* | |
578 | * Register RAM areas with the bootmem allocator. | |
579 | */ | |
bcc8bcb1 | 580 | last_rw_end = start_pfn; |
c9e37353 | 581 | |
0b642ede | 582 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
bcc8bcb1 | 583 | unsigned long start_chunk, end_chunk; |
1da177e4 LT |
584 | |
585 | if (memory_chunk[i].type != CHUNK_READ_WRITE) | |
586 | continue; | |
bcc8bcb1 HC |
587 | start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1); |
588 | start_chunk >>= PAGE_SHIFT; | |
589 | end_chunk = (memory_chunk[i].addr + memory_chunk[i].size); | |
590 | end_chunk >>= PAGE_SHIFT; | |
591 | if (start_chunk < start_pfn) | |
592 | start_chunk = start_pfn; | |
593 | if (end_chunk > end_pfn) | |
594 | end_chunk = end_pfn; | |
595 | if (start_chunk < end_chunk) { | |
596 | /* Initialize storage key for RAM pages */ | |
597 | for (init_pfn = start_chunk ; init_pfn < end_chunk; | |
598 | init_pfn++) | |
599 | page_set_storage_key(init_pfn << PAGE_SHIFT, | |
600 | PAGE_DEFAULT_KEY); | |
601 | free_bootmem(start_chunk << PAGE_SHIFT, | |
602 | (end_chunk - start_chunk) << PAGE_SHIFT); | |
603 | if (last_rw_end < start_chunk) | |
604 | add_memory_hole(last_rw_end, start_chunk - 1); | |
605 | last_rw_end = end_chunk; | |
606 | } | |
1da177e4 LT |
607 | } |
608 | ||
0b642ede PO |
609 | psw_set_key(PAGE_DEFAULT_KEY); |
610 | ||
bcc8bcb1 HC |
611 | if (last_rw_end < end_pfn - 1) |
612 | add_memory_hole(last_rw_end, end_pfn - 1); | |
c9e37353 HC |
613 | |
614 | /* | |
615 | * Reserve the bootmem bitmap itself as well. We do this in two | |
616 | * steps (first step was init_bootmem()) because this catches | |
617 | * the (very unlikely) case of us accidentally initializing the | |
618 | * bootmem allocator with an invalid RAM area. | |
619 | */ | |
620 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size); | |
1da177e4 LT |
621 | |
622 | #ifdef CONFIG_BLK_DEV_INITRD | |
65912a84 | 623 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 LT |
624 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
625 | reserve_bootmem(INITRD_START, INITRD_SIZE); | |
626 | initrd_start = INITRD_START; | |
627 | initrd_end = initrd_start + INITRD_SIZE; | |
628 | } else { | |
c9e37353 HC |
629 | printk("initrd extends beyond end of memory " |
630 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
631 | initrd_start + INITRD_SIZE, memory_end); | |
632 | initrd_start = initrd_end = 0; | |
1da177e4 | 633 | } |
c9e37353 | 634 | } |
1da177e4 | 635 | #endif |
c9e37353 | 636 | } |
1da177e4 | 637 | |
c9e37353 HC |
638 | /* |
639 | * Setup function called from init/main.c just after the banner | |
640 | * was printed. | |
641 | */ | |
1da177e4 | 642 | |
c9e37353 HC |
643 | void __init |
644 | setup_arch(char **cmdline_p) | |
645 | { | |
1da177e4 | 646 | /* |
c9e37353 | 647 | * print what head.S has found out about the machine |
1da177e4 | 648 | */ |
347a8dc3 | 649 | #ifndef CONFIG_64BIT |
c9e37353 HC |
650 | printk((MACHINE_IS_VM) ? |
651 | "We are running under VM (31 bit mode)\n" : | |
652 | "We are running native (31 bit mode)\n"); | |
653 | printk((MACHINE_HAS_IEEE) ? | |
654 | "This machine has an IEEE fpu\n" : | |
655 | "This machine has no IEEE fpu\n"); | |
347a8dc3 | 656 | #else /* CONFIG_64BIT */ |
c9e37353 HC |
657 | printk((MACHINE_IS_VM) ? |
658 | "We are running under VM (64 bit mode)\n" : | |
659 | "We are running native (64 bit mode)\n"); | |
347a8dc3 | 660 | #endif /* CONFIG_64BIT */ |
c9e37353 | 661 | |
59685296 HC |
662 | /* Save unparsed command line copy for /proc/cmdline */ |
663 | strlcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); | |
664 | ||
665 | *cmdline_p = COMMAND_LINE; | |
666 | *(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0'; | |
667 | ||
c9e37353 | 668 | ROOT_DEV = Root_RAM0; |
59685296 HC |
669 | |
670 | init_mm.start_code = PAGE_OFFSET; | |
671 | init_mm.end_code = (unsigned long) &_etext; | |
672 | init_mm.end_data = (unsigned long) &_edata; | |
673 | init_mm.brk = (unsigned long) &_end; | |
674 | ||
6c2a9e6d GS |
675 | if (MACHINE_HAS_MVCOS) |
676 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); | |
677 | else | |
678 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); | |
679 | ||
59685296 HC |
680 | parse_early_param(); |
681 | ||
8b62bc96 | 682 | setup_memory_end(); |
c9e37353 HC |
683 | setup_memory(); |
684 | setup_resources(); | |
685 | setup_lowcore(); | |
686 | ||
1da177e4 LT |
687 | cpu_init(); |
688 | __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr; | |
255acee7 | 689 | smp_setup_cpu_possible_map(); |
1da177e4 LT |
690 | |
691 | /* | |
692 | * Create kernel page tables and switch to virtual addressing. | |
693 | */ | |
694 | paging_init(); | |
695 | ||
696 | /* Setup default console */ | |
697 | conmode_default(); | |
698 | } | |
699 | ||
700 | void print_cpu_info(struct cpuinfo_S390 *cpuinfo) | |
701 | { | |
702 | printk("cpu %d " | |
703 | #ifdef CONFIG_SMP | |
704 | "phys_idx=%d " | |
705 | #endif | |
706 | "vers=%02X ident=%06X machine=%04X unused=%04X\n", | |
707 | cpuinfo->cpu_nr, | |
708 | #ifdef CONFIG_SMP | |
709 | cpuinfo->cpu_addr, | |
710 | #endif | |
711 | cpuinfo->cpu_id.version, | |
712 | cpuinfo->cpu_id.ident, | |
713 | cpuinfo->cpu_id.machine, | |
714 | cpuinfo->cpu_id.unused); | |
715 | } | |
716 | ||
717 | /* | |
718 | * show_cpuinfo - Get information on one CPU for use by procfs. | |
719 | */ | |
720 | ||
721 | static int show_cpuinfo(struct seq_file *m, void *v) | |
722 | { | |
723 | struct cpuinfo_S390 *cpuinfo; | |
724 | unsigned long n = (unsigned long) v - 1; | |
725 | ||
b7ae9dd8 | 726 | preempt_disable(); |
1da177e4 LT |
727 | if (!n) { |
728 | seq_printf(m, "vendor_id : IBM/S390\n" | |
729 | "# processors : %i\n" | |
730 | "bogomips per cpu: %lu.%02lu\n", | |
731 | num_online_cpus(), loops_per_jiffy/(500000/HZ), | |
732 | (loops_per_jiffy/(5000/HZ))%100); | |
733 | } | |
734 | if (cpu_online(n)) { | |
735 | #ifdef CONFIG_SMP | |
736 | if (smp_processor_id() == n) | |
737 | cpuinfo = &S390_lowcore.cpu_data; | |
738 | else | |
739 | cpuinfo = &lowcore_ptr[n]->cpu_data; | |
740 | #else | |
741 | cpuinfo = &S390_lowcore.cpu_data; | |
742 | #endif | |
743 | seq_printf(m, "processor %li: " | |
744 | "version = %02X, " | |
745 | "identification = %06X, " | |
746 | "machine = %04X\n", | |
747 | n, cpuinfo->cpu_id.version, | |
748 | cpuinfo->cpu_id.ident, | |
749 | cpuinfo->cpu_id.machine); | |
750 | } | |
b7ae9dd8 | 751 | preempt_enable(); |
1da177e4 LT |
752 | return 0; |
753 | } | |
754 | ||
755 | static void *c_start(struct seq_file *m, loff_t *pos) | |
756 | { | |
757 | return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL; | |
758 | } | |
759 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
760 | { | |
761 | ++*pos; | |
762 | return c_start(m, pos); | |
763 | } | |
764 | static void c_stop(struct seq_file *m, void *v) | |
765 | { | |
766 | } | |
767 | struct seq_operations cpuinfo_op = { | |
768 | .start = c_start, | |
769 | .next = c_next, | |
770 | .stop = c_stop, | |
771 | .show = show_cpuinfo, | |
772 | }; | |
773 |