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> |
fe355b7f | 41 | #include <linux/ctype.h> |
2b67fc46 | 42 | #include <linux/reboot.h> |
1da177e4 | 43 | |
46b05d26 | 44 | #include <asm/ipl.h> |
1da177e4 LT |
45 | #include <asm/uaccess.h> |
46 | #include <asm/system.h> | |
47 | #include <asm/smp.h> | |
48 | #include <asm/mmu_context.h> | |
49 | #include <asm/cpcmd.h> | |
50 | #include <asm/lowcore.h> | |
51 | #include <asm/irq.h> | |
0b642ede PO |
52 | #include <asm/page.h> |
53 | #include <asm/ptrace.h> | |
cc13ad62 | 54 | #include <asm/sections.h> |
fe355b7f | 55 | #include <asm/ebcdic.h> |
c1821c2e GS |
56 | #include <asm/compat.h> |
57 | ||
58 | long psw_kernel_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | | |
59 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY); | |
60 | long psw_user_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | | |
61 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
62 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY); | |
1da177e4 | 63 | |
d02765d1 GS |
64 | /* |
65 | * User copy operations. | |
66 | */ | |
67 | struct uaccess_ops uaccess; | |
68 | EXPORT_SYMBOL_GPL(uaccess); | |
69 | ||
1da177e4 LT |
70 | /* |
71 | * Machine setup.. | |
72 | */ | |
73 | unsigned int console_mode = 0; | |
74 | unsigned int console_devno = -1; | |
75 | unsigned int console_irq = -1; | |
1da177e4 | 76 | unsigned long machine_flags = 0; |
36a2bd42 | 77 | |
f4eb07c1 | 78 | struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
1da177e4 | 79 | volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ |
c9e37353 | 80 | static unsigned long __initdata memory_end; |
1da177e4 | 81 | |
1da177e4 LT |
82 | /* |
83 | * This is set up by the setup-routine at boot-time | |
84 | * for S390 need to find out, what we have to setup | |
85 | * using address 0x10400 ... | |
86 | */ | |
87 | ||
88 | #include <asm/setup.h> | |
89 | ||
1da177e4 LT |
90 | static struct resource code_resource = { |
91 | .name = "Kernel code", | |
92 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
93 | }; | |
94 | ||
95 | static struct resource data_resource = { | |
96 | .name = "Kernel data", | |
97 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
98 | }; | |
99 | ||
100 | /* | |
101 | * cpu_init() initializes state that is per-CPU. | |
102 | */ | |
103 | void __devinit cpu_init (void) | |
104 | { | |
105 | int addr = hard_smp_processor_id(); | |
106 | ||
107 | /* | |
108 | * Store processor id in lowcore (used e.g. in timer_interrupt) | |
109 | */ | |
72960a02 | 110 | get_cpu_id(&S390_lowcore.cpu_data.cpu_id); |
1da177e4 LT |
111 | S390_lowcore.cpu_data.cpu_addr = addr; |
112 | ||
113 | /* | |
114 | * Force FPU initialization: | |
115 | */ | |
116 | clear_thread_flag(TIF_USEDFPU); | |
117 | clear_used_math(); | |
118 | ||
119 | atomic_inc(&init_mm.mm_count); | |
120 | current->active_mm = &init_mm; | |
121 | if (current->mm) | |
122 | BUG(); | |
123 | enter_lazy_tlb(&init_mm, current); | |
124 | } | |
125 | ||
126 | /* | |
127 | * VM halt and poweroff setup routines | |
128 | */ | |
129 | char vmhalt_cmd[128] = ""; | |
130 | char vmpoff_cmd[128] = ""; | |
2b67fc46 | 131 | static char vmpanic_cmd[128] = ""; |
1da177e4 | 132 | |
4d284cac | 133 | static void strncpy_skip_quote(char *dst, char *src, int n) |
1da177e4 LT |
134 | { |
135 | int sx, dx; | |
136 | ||
137 | dx = 0; | |
138 | for (sx = 0; src[sx] != 0; sx++) { | |
139 | if (src[sx] == '"') continue; | |
140 | dst[dx++] = src[sx]; | |
141 | if (dx >= n) break; | |
142 | } | |
143 | } | |
144 | ||
145 | static int __init vmhalt_setup(char *str) | |
146 | { | |
147 | strncpy_skip_quote(vmhalt_cmd, str, 127); | |
148 | vmhalt_cmd[127] = 0; | |
149 | return 1; | |
150 | } | |
151 | ||
152 | __setup("vmhalt=", vmhalt_setup); | |
153 | ||
154 | static int __init vmpoff_setup(char *str) | |
155 | { | |
156 | strncpy_skip_quote(vmpoff_cmd, str, 127); | |
157 | vmpoff_cmd[127] = 0; | |
158 | return 1; | |
159 | } | |
160 | ||
161 | __setup("vmpoff=", vmpoff_setup); | |
162 | ||
585c3047 PO |
163 | static int vmpanic_notify(struct notifier_block *self, unsigned long event, |
164 | void *data) | |
165 | { | |
166 | if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0) | |
167 | cpcmd(vmpanic_cmd, NULL, 0, NULL); | |
168 | ||
169 | return NOTIFY_OK; | |
170 | } | |
171 | ||
172 | #define PANIC_PRI_VMPANIC 0 | |
173 | ||
174 | static struct notifier_block vmpanic_nb = { | |
175 | .notifier_call = vmpanic_notify, | |
176 | .priority = PANIC_PRI_VMPANIC | |
177 | }; | |
178 | ||
179 | static int __init vmpanic_setup(char *str) | |
180 | { | |
181 | static int register_done __initdata = 0; | |
182 | ||
183 | strncpy_skip_quote(vmpanic_cmd, str, 127); | |
184 | vmpanic_cmd[127] = 0; | |
185 | if (!register_done) { | |
186 | register_done = 1; | |
187 | atomic_notifier_chain_register(&panic_notifier_list, | |
188 | &vmpanic_nb); | |
189 | } | |
190 | return 1; | |
191 | } | |
192 | ||
193 | __setup("vmpanic=", vmpanic_setup); | |
194 | ||
1da177e4 LT |
195 | /* |
196 | * condev= and conmode= setup parameter. | |
197 | */ | |
198 | ||
199 | static int __init condev_setup(char *str) | |
200 | { | |
201 | int vdev; | |
202 | ||
203 | vdev = simple_strtoul(str, &str, 0); | |
204 | if (vdev >= 0 && vdev < 65536) { | |
205 | console_devno = vdev; | |
206 | console_irq = -1; | |
207 | } | |
208 | return 1; | |
209 | } | |
210 | ||
211 | __setup("condev=", condev_setup); | |
212 | ||
213 | static int __init conmode_setup(char *str) | |
214 | { | |
215 | #if defined(CONFIG_SCLP_CONSOLE) | |
216 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) | |
217 | SET_CONSOLE_SCLP; | |
218 | #endif | |
219 | #if defined(CONFIG_TN3215_CONSOLE) | |
220 | if (strncmp(str, "3215", 5) == 0) | |
221 | SET_CONSOLE_3215; | |
222 | #endif | |
223 | #if defined(CONFIG_TN3270_CONSOLE) | |
224 | if (strncmp(str, "3270", 5) == 0) | |
225 | SET_CONSOLE_3270; | |
226 | #endif | |
227 | return 1; | |
228 | } | |
229 | ||
230 | __setup("conmode=", conmode_setup); | |
231 | ||
232 | static void __init conmode_default(void) | |
233 | { | |
234 | char query_buffer[1024]; | |
235 | char *ptr; | |
236 | ||
237 | if (MACHINE_IS_VM) { | |
740b5706 | 238 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
239 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
240 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
241 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
740b5706 | 242 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
243 | ptr = strstr(query_buffer, "CONMODE"); |
244 | /* | |
245 | * Set the conmode to 3215 so that the device recognition | |
246 | * will set the cu_type of the console to 3215. If the | |
247 | * conmode is 3270 and we don't set it back then both | |
248 | * 3215 and the 3270 driver will try to access the console | |
249 | * device (3215 as console and 3270 as normal tty). | |
250 | */ | |
740b5706 | 251 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 LT |
252 | if (ptr == NULL) { |
253 | #if defined(CONFIG_SCLP_CONSOLE) | |
254 | SET_CONSOLE_SCLP; | |
255 | #endif | |
256 | return; | |
257 | } | |
258 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
259 | #if defined(CONFIG_TN3270_CONSOLE) | |
260 | SET_CONSOLE_3270; | |
261 | #elif defined(CONFIG_TN3215_CONSOLE) | |
262 | SET_CONSOLE_3215; | |
263 | #elif defined(CONFIG_SCLP_CONSOLE) | |
264 | SET_CONSOLE_SCLP; | |
265 | #endif | |
266 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
267 | #if defined(CONFIG_TN3215_CONSOLE) | |
268 | SET_CONSOLE_3215; | |
269 | #elif defined(CONFIG_TN3270_CONSOLE) | |
270 | SET_CONSOLE_3270; | |
271 | #elif defined(CONFIG_SCLP_CONSOLE) | |
272 | SET_CONSOLE_SCLP; | |
273 | #endif | |
274 | } | |
275 | } else if (MACHINE_IS_P390) { | |
276 | #if defined(CONFIG_TN3215_CONSOLE) | |
277 | SET_CONSOLE_3215; | |
278 | #elif defined(CONFIG_TN3270_CONSOLE) | |
279 | SET_CONSOLE_3270; | |
280 | #endif | |
281 | } else { | |
282 | #if defined(CONFIG_SCLP_CONSOLE) | |
283 | SET_CONSOLE_SCLP; | |
284 | #endif | |
285 | } | |
286 | } | |
287 | ||
288 | #ifdef CONFIG_SMP | |
1da177e4 LT |
289 | void (*_machine_restart)(char *command) = machine_restart_smp; |
290 | void (*_machine_halt)(void) = machine_halt_smp; | |
291 | void (*_machine_power_off)(void) = machine_power_off_smp; | |
292 | #else | |
293 | /* | |
294 | * Reboot, halt and power_off routines for non SMP. | |
295 | */ | |
1da177e4 LT |
296 | static void do_machine_restart_nonsmp(char * __unused) |
297 | { | |
ff6b8ea6 | 298 | do_reipl(); |
1da177e4 LT |
299 | } |
300 | ||
301 | static void do_machine_halt_nonsmp(void) | |
302 | { | |
303 | if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) | |
740b5706 | 304 | __cpcmd(vmhalt_cmd, NULL, 0, NULL); |
1da177e4 LT |
305 | signal_processor(smp_processor_id(), sigp_stop_and_store_status); |
306 | } | |
307 | ||
308 | static void do_machine_power_off_nonsmp(void) | |
309 | { | |
310 | if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) | |
740b5706 | 311 | __cpcmd(vmpoff_cmd, NULL, 0, NULL); |
1da177e4 LT |
312 | signal_processor(smp_processor_id(), sigp_stop_and_store_status); |
313 | } | |
314 | ||
315 | void (*_machine_restart)(char *command) = do_machine_restart_nonsmp; | |
316 | void (*_machine_halt)(void) = do_machine_halt_nonsmp; | |
317 | void (*_machine_power_off)(void) = do_machine_power_off_nonsmp; | |
318 | #endif | |
319 | ||
320 | /* | |
321 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
322 | * _machine_halt or _machine_power_off. | |
323 | */ | |
324 | ||
325 | void machine_restart(char *command) | |
326 | { | |
06fa46a2 MS |
327 | if (!in_interrupt() || oops_in_progress) |
328 | /* | |
329 | * Only unblank the console if we are called in enabled | |
330 | * context or a bust_spinlocks cleared the way for us. | |
331 | */ | |
332 | console_unblank(); | |
1da177e4 LT |
333 | _machine_restart(command); |
334 | } | |
335 | ||
1da177e4 LT |
336 | void machine_halt(void) |
337 | { | |
06fa46a2 MS |
338 | if (!in_interrupt() || oops_in_progress) |
339 | /* | |
340 | * Only unblank the console if we are called in enabled | |
341 | * context or a bust_spinlocks cleared the way for us. | |
342 | */ | |
343 | console_unblank(); | |
1da177e4 LT |
344 | _machine_halt(); |
345 | } | |
346 | ||
1da177e4 LT |
347 | void machine_power_off(void) |
348 | { | |
06fa46a2 MS |
349 | if (!in_interrupt() || oops_in_progress) |
350 | /* | |
351 | * Only unblank the console if we are called in enabled | |
352 | * context or a bust_spinlocks cleared the way for us. | |
353 | */ | |
354 | console_unblank(); | |
1da177e4 LT |
355 | _machine_power_off(); |
356 | } | |
357 | ||
53df751c MS |
358 | /* |
359 | * Dummy power off function. | |
360 | */ | |
361 | void (*pm_power_off)(void) = machine_power_off; | |
362 | ||
59685296 HC |
363 | static int __init early_parse_mem(char *p) |
364 | { | |
365 | memory_end = memparse(p, &p); | |
366 | return 0; | |
367 | } | |
368 | early_param("mem", early_parse_mem); | |
369 | ||
370 | /* | |
371 | * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes | |
372 | */ | |
373 | static int __init early_parse_ipldelay(char *p) | |
c9e37353 | 374 | { |
c9e37353 | 375 | unsigned long delay = 0; |
1da177e4 | 376 | |
59685296 | 377 | delay = simple_strtoul(p, &p, 0); |
1da177e4 | 378 | |
59685296 HC |
379 | switch (*p) { |
380 | case 's': | |
381 | case 'S': | |
382 | delay *= 1000000; | |
383 | break; | |
384 | case 'm': | |
385 | case 'M': | |
386 | delay *= 60 * 1000000; | |
c9e37353 | 387 | } |
59685296 HC |
388 | |
389 | /* now wait for the requested amount of time */ | |
390 | udelay(delay); | |
391 | ||
392 | return 0; | |
c9e37353 | 393 | } |
59685296 | 394 | early_param("ipldelay", early_parse_ipldelay); |
c9e37353 | 395 | |
c1821c2e GS |
396 | #ifdef CONFIG_S390_SWITCH_AMODE |
397 | unsigned int switch_amode = 0; | |
398 | EXPORT_SYMBOL_GPL(switch_amode); | |
399 | ||
4d284cac HC |
400 | static void set_amode_and_uaccess(unsigned long user_amode, |
401 | unsigned long user32_amode) | |
c1821c2e GS |
402 | { |
403 | psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode | | |
404 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
405 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
406 | #ifdef CONFIG_COMPAT | |
407 | psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode | | |
408 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
409 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
410 | psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode | | |
411 | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | | |
412 | PSW32_MASK_PSTATE; | |
413 | #endif | |
414 | psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | | |
415 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY; | |
416 | ||
417 | if (MACHINE_HAS_MVCOS) { | |
418 | printk("mvcos available.\n"); | |
419 | memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); | |
420 | } else { | |
421 | printk("mvcos not available.\n"); | |
422 | memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); | |
423 | } | |
424 | } | |
425 | ||
426 | /* | |
427 | * Switch kernel/user addressing modes? | |
428 | */ | |
429 | static int __init early_parse_switch_amode(char *p) | |
430 | { | |
431 | switch_amode = 1; | |
432 | return 0; | |
433 | } | |
434 | early_param("switch_amode", early_parse_switch_amode); | |
435 | ||
436 | #else /* CONFIG_S390_SWITCH_AMODE */ | |
437 | static inline void set_amode_and_uaccess(unsigned long user_amode, | |
438 | unsigned long user32_amode) | |
439 | { | |
440 | } | |
441 | #endif /* CONFIG_S390_SWITCH_AMODE */ | |
442 | ||
443 | #ifdef CONFIG_S390_EXEC_PROTECT | |
444 | unsigned int s390_noexec = 0; | |
445 | EXPORT_SYMBOL_GPL(s390_noexec); | |
446 | ||
447 | /* | |
448 | * Enable execute protection? | |
449 | */ | |
450 | static int __init early_parse_noexec(char *p) | |
451 | { | |
452 | if (!strncmp(p, "off", 3)) | |
453 | return 0; | |
454 | switch_amode = 1; | |
455 | s390_noexec = 1; | |
456 | return 0; | |
457 | } | |
458 | early_param("noexec", early_parse_noexec); | |
459 | #endif /* CONFIG_S390_EXEC_PROTECT */ | |
460 | ||
461 | static void setup_addressing_mode(void) | |
462 | { | |
463 | if (s390_noexec) { | |
464 | printk("S390 execute protection active, "); | |
465 | set_amode_and_uaccess(PSW_ASC_SECONDARY, PSW32_ASC_SECONDARY); | |
466 | return; | |
467 | } | |
468 | if (switch_amode) { | |
469 | printk("S390 address spaces switched, "); | |
470 | set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY); | |
471 | } | |
472 | } | |
473 | ||
c9e37353 HC |
474 | static void __init |
475 | setup_lowcore(void) | |
476 | { | |
477 | struct _lowcore *lc; | |
478 | int lc_pages; | |
479 | ||
480 | /* | |
481 | * Setup lowcore for boot cpu | |
482 | */ | |
483 | lc_pages = sizeof(void *) == 8 ? 2 : 1; | |
484 | lc = (struct _lowcore *) | |
485 | __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); | |
486 | memset(lc, 0, lc_pages * PAGE_SIZE); | |
0b642ede | 487 | lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; |
c9e37353 HC |
488 | lc->restart_psw.addr = |
489 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; | |
c1821c2e GS |
490 | if (switch_amode) |
491 | lc->restart_psw.mask |= PSW_ASC_HOME; | |
492 | lc->external_new_psw.mask = psw_kernel_bits; | |
c9e37353 HC |
493 | lc->external_new_psw.addr = |
494 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
c1821c2e | 495 | lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_IO | PSW_MASK_EXT; |
c9e37353 | 496 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
c1821c2e | 497 | lc->program_new_psw.mask = psw_kernel_bits; |
c9e37353 HC |
498 | lc->program_new_psw.addr = |
499 | PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; | |
77fa2245 | 500 | lc->mcck_new_psw.mask = |
c1821c2e | 501 | psw_kernel_bits & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; |
c9e37353 HC |
502 | lc->mcck_new_psw.addr = |
503 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
c1821c2e | 504 | lc->io_new_psw.mask = psw_kernel_bits; |
c9e37353 HC |
505 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
506 | lc->ipl_device = S390_lowcore.ipl_device; | |
507 | lc->jiffy_timer = -1LL; | |
508 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; | |
509 | lc->async_stack = (unsigned long) | |
510 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; | |
c9e37353 HC |
511 | lc->panic_stack = (unsigned long) |
512 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; | |
c9e37353 HC |
513 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
514 | lc->thread_info = (unsigned long) &init_thread_union; | |
347a8dc3 | 515 | #ifndef CONFIG_64BIT |
77fa2245 HC |
516 | if (MACHINE_HAS_IEEE) { |
517 | lc->extended_save_area_addr = (__u32) | |
518 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0); | |
519 | /* enable extended save area */ | |
c4972f33 | 520 | __ctl_set_bit(14, 29); |
77fa2245 HC |
521 | } |
522 | #endif | |
c9e37353 HC |
523 | set_prefix((u32)(unsigned long) lc); |
524 | } | |
525 | ||
526 | static void __init | |
527 | setup_resources(void) | |
528 | { | |
fe355b7f | 529 | struct resource *res, *sub_res; |
c9e37353 HC |
530 | int i; |
531 | ||
cc13ad62 HC |
532 | code_resource.start = (unsigned long) &_text; |
533 | code_resource.end = (unsigned long) &_etext - 1; | |
534 | data_resource.start = (unsigned long) &_etext; | |
535 | data_resource.end = (unsigned long) &_edata - 1; | |
536 | ||
c9e37353 HC |
537 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
538 | res = alloc_bootmem_low(sizeof(struct resource)); | |
539 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; | |
540 | switch (memory_chunk[i].type) { | |
541 | case CHUNK_READ_WRITE: | |
542 | res->name = "System RAM"; | |
543 | break; | |
544 | case CHUNK_READ_ONLY: | |
545 | res->name = "System ROM"; | |
546 | res->flags |= IORESOURCE_READONLY; | |
547 | break; | |
548 | default: | |
549 | res->name = "reserved"; | |
550 | } | |
551 | res->start = memory_chunk[i].addr; | |
552 | res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; | |
553 | request_resource(&iomem_resource, res); | |
fe355b7f HY |
554 | |
555 | if (code_resource.start >= res->start && | |
556 | code_resource.start <= res->end && | |
557 | code_resource.end > res->end) { | |
558 | sub_res = alloc_bootmem_low(sizeof(struct resource)); | |
559 | memcpy(sub_res, &code_resource, | |
560 | sizeof(struct resource)); | |
561 | sub_res->end = res->end; | |
562 | code_resource.start = res->end + 1; | |
563 | request_resource(res, sub_res); | |
564 | } | |
565 | ||
566 | if (code_resource.start >= res->start && | |
567 | code_resource.start <= res->end && | |
568 | code_resource.end <= res->end) | |
569 | request_resource(res, &code_resource); | |
570 | ||
571 | if (data_resource.start >= res->start && | |
572 | data_resource.start <= res->end && | |
573 | data_resource.end > res->end) { | |
574 | sub_res = alloc_bootmem_low(sizeof(struct resource)); | |
575 | memcpy(sub_res, &data_resource, | |
576 | sizeof(struct resource)); | |
577 | sub_res->end = res->end; | |
578 | data_resource.start = res->end + 1; | |
579 | request_resource(res, sub_res); | |
580 | } | |
581 | ||
582 | if (data_resource.start >= res->start && | |
583 | data_resource.start <= res->end && | |
584 | data_resource.end <= res->end) | |
585 | request_resource(res, &data_resource); | |
c9e37353 HC |
586 | } |
587 | } | |
588 | ||
8b62bc96 HC |
589 | static void __init setup_memory_end(void) |
590 | { | |
591 | unsigned long real_size, memory_size; | |
592 | unsigned long max_mem, max_phys; | |
593 | int i; | |
594 | ||
595 | memory_size = real_size = 0; | |
de338a37 | 596 | max_phys = VMALLOC_END_INIT - VMALLOC_MIN_SIZE; |
8b62bc96 HC |
597 | memory_end &= PAGE_MASK; |
598 | ||
599 | max_mem = memory_end ? min(max_phys, memory_end) : max_phys; | |
600 | ||
601 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
602 | struct mem_chunk *chunk = &memory_chunk[i]; | |
603 | ||
604 | real_size = max(real_size, chunk->addr + chunk->size); | |
605 | if (chunk->addr >= max_mem) { | |
606 | memset(chunk, 0, sizeof(*chunk)); | |
607 | continue; | |
608 | } | |
609 | if (chunk->addr + chunk->size > max_mem) | |
610 | chunk->size = max_mem - chunk->addr; | |
611 | memory_size = max(memory_size, chunk->addr + chunk->size); | |
612 | } | |
613 | if (!memory_end) | |
614 | memory_end = memory_size; | |
8b62bc96 HC |
615 | } |
616 | ||
c9e37353 HC |
617 | static void __init |
618 | setup_memory(void) | |
619 | { | |
620 | unsigned long bootmap_size; | |
fe355b7f | 621 | unsigned long start_pfn, end_pfn; |
c9e37353 | 622 | int i; |
1da177e4 LT |
623 | |
624 | /* | |
625 | * partially used pages are not usable - thus | |
626 | * we are rounding upwards: | |
627 | */ | |
65912a84 HC |
628 | start_pfn = PFN_UP(__pa(&_end)); |
629 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 630 | |
65912a84 HC |
631 | #ifdef CONFIG_BLK_DEV_INITRD |
632 | /* | |
633 | * Move the initrd in case the bitmap of the bootmem allocater | |
634 | * would overwrite it. | |
635 | */ | |
636 | ||
637 | if (INITRD_START && INITRD_SIZE) { | |
638 | unsigned long bmap_size; | |
639 | unsigned long start; | |
640 | ||
641 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
642 | bmap_size = PFN_PHYS(bmap_size); | |
643 | ||
644 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
645 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
646 | ||
647 | if (start + INITRD_SIZE > memory_end) { | |
648 | printk("initrd extends beyond end of memory " | |
649 | "(0x%08lx > 0x%08lx)\n" | |
650 | "disabling initrd\n", | |
651 | start + INITRD_SIZE, memory_end); | |
652 | INITRD_START = INITRD_SIZE = 0; | |
653 | } else { | |
654 | printk("Moving initrd (0x%08lx -> 0x%08lx, " | |
655 | "size: %ld)\n", | |
656 | INITRD_START, start, INITRD_SIZE); | |
657 | memmove((void *) start, (void *) INITRD_START, | |
658 | INITRD_SIZE); | |
659 | INITRD_START = start; | |
660 | } | |
661 | } | |
662 | } | |
663 | #endif | |
664 | ||
1da177e4 | 665 | /* |
7676bef9 | 666 | * Initialize the boot-time allocator |
1da177e4 LT |
667 | */ |
668 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
669 | ||
670 | /* | |
671 | * Register RAM areas with the bootmem allocator. | |
672 | */ | |
c9e37353 | 673 | |
0b642ede | 674 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
39b742f9 | 675 | unsigned long start_chunk, end_chunk, pfn; |
1da177e4 LT |
676 | |
677 | if (memory_chunk[i].type != CHUNK_READ_WRITE) | |
678 | continue; | |
39b742f9 HC |
679 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
680 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size) - 1; | |
681 | end_chunk = min(end_chunk, end_pfn); | |
682 | if (start_chunk >= end_chunk) | |
683 | continue; | |
684 | add_active_range(0, start_chunk, end_chunk); | |
685 | pfn = max(start_chunk, start_pfn); | |
686 | for (; pfn <= end_chunk; pfn++) | |
687 | page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY); | |
1da177e4 LT |
688 | } |
689 | ||
0b642ede PO |
690 | psw_set_key(PAGE_DEFAULT_KEY); |
691 | ||
39b742f9 | 692 | free_bootmem_with_active_regions(0, max_pfn); |
c9e37353 | 693 | |
615b04b3 HC |
694 | /* |
695 | * Reserve memory used for lowcore/command line/kernel image. | |
696 | */ | |
697 | reserve_bootmem(0, (unsigned long)_ehead); | |
698 | reserve_bootmem((unsigned long)_stext, | |
699 | PFN_PHYS(start_pfn) - (unsigned long)_stext); | |
c9e37353 HC |
700 | /* |
701 | * Reserve the bootmem bitmap itself as well. We do this in two | |
702 | * steps (first step was init_bootmem()) because this catches | |
703 | * the (very unlikely) case of us accidentally initializing the | |
704 | * bootmem allocator with an invalid RAM area. | |
705 | */ | |
706 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size); | |
1da177e4 LT |
707 | |
708 | #ifdef CONFIG_BLK_DEV_INITRD | |
65912a84 | 709 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 LT |
710 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
711 | reserve_bootmem(INITRD_START, INITRD_SIZE); | |
712 | initrd_start = INITRD_START; | |
713 | initrd_end = initrd_start + INITRD_SIZE; | |
714 | } else { | |
c9e37353 HC |
715 | printk("initrd extends beyond end of memory " |
716 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
717 | initrd_start + INITRD_SIZE, memory_end); | |
718 | initrd_start = initrd_end = 0; | |
1da177e4 | 719 | } |
c9e37353 | 720 | } |
1da177e4 | 721 | #endif |
c9e37353 | 722 | } |
1da177e4 | 723 | |
c9e37353 HC |
724 | /* |
725 | * Setup function called from init/main.c just after the banner | |
726 | * was printed. | |
727 | */ | |
1da177e4 | 728 | |
c9e37353 HC |
729 | void __init |
730 | setup_arch(char **cmdline_p) | |
731 | { | |
1da177e4 | 732 | /* |
c9e37353 | 733 | * print what head.S has found out about the machine |
1da177e4 | 734 | */ |
347a8dc3 | 735 | #ifndef CONFIG_64BIT |
c9e37353 HC |
736 | printk((MACHINE_IS_VM) ? |
737 | "We are running under VM (31 bit mode)\n" : | |
738 | "We are running native (31 bit mode)\n"); | |
739 | printk((MACHINE_HAS_IEEE) ? | |
740 | "This machine has an IEEE fpu\n" : | |
741 | "This machine has no IEEE fpu\n"); | |
347a8dc3 | 742 | #else /* CONFIG_64BIT */ |
c9e37353 HC |
743 | printk((MACHINE_IS_VM) ? |
744 | "We are running under VM (64 bit mode)\n" : | |
745 | "We are running native (64 bit mode)\n"); | |
347a8dc3 | 746 | #endif /* CONFIG_64BIT */ |
c9e37353 | 747 | |
59685296 | 748 | /* Save unparsed command line copy for /proc/cmdline */ |
e06b1a35 | 749 | strlcpy(boot_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); |
59685296 HC |
750 | |
751 | *cmdline_p = COMMAND_LINE; | |
752 | *(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0'; | |
753 | ||
c9e37353 | 754 | ROOT_DEV = Root_RAM0; |
59685296 HC |
755 | |
756 | init_mm.start_code = PAGE_OFFSET; | |
757 | init_mm.end_code = (unsigned long) &_etext; | |
758 | init_mm.end_data = (unsigned long) &_edata; | |
759 | init_mm.brk = (unsigned long) &_end; | |
760 | ||
6c2a9e6d GS |
761 | if (MACHINE_HAS_MVCOS) |
762 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); | |
763 | else | |
764 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); | |
765 | ||
59685296 HC |
766 | parse_early_param(); |
767 | ||
8b62bc96 | 768 | setup_memory_end(); |
c1821c2e | 769 | setup_addressing_mode(); |
c9e37353 HC |
770 | setup_memory(); |
771 | setup_resources(); | |
772 | setup_lowcore(); | |
773 | ||
1da177e4 LT |
774 | cpu_init(); |
775 | __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr; | |
255acee7 | 776 | smp_setup_cpu_possible_map(); |
1da177e4 LT |
777 | |
778 | /* | |
779 | * Create kernel page tables and switch to virtual addressing. | |
780 | */ | |
781 | paging_init(); | |
782 | ||
783 | /* Setup default console */ | |
784 | conmode_default(); | |
785 | } | |
786 | ||
787 | void print_cpu_info(struct cpuinfo_S390 *cpuinfo) | |
788 | { | |
789 | printk("cpu %d " | |
790 | #ifdef CONFIG_SMP | |
791 | "phys_idx=%d " | |
792 | #endif | |
793 | "vers=%02X ident=%06X machine=%04X unused=%04X\n", | |
794 | cpuinfo->cpu_nr, | |
795 | #ifdef CONFIG_SMP | |
796 | cpuinfo->cpu_addr, | |
797 | #endif | |
798 | cpuinfo->cpu_id.version, | |
799 | cpuinfo->cpu_id.ident, | |
800 | cpuinfo->cpu_id.machine, | |
801 | cpuinfo->cpu_id.unused); | |
802 | } | |
803 | ||
804 | /* | |
805 | * show_cpuinfo - Get information on one CPU for use by procfs. | |
806 | */ | |
807 | ||
808 | static int show_cpuinfo(struct seq_file *m, void *v) | |
809 | { | |
810 | struct cpuinfo_S390 *cpuinfo; | |
811 | unsigned long n = (unsigned long) v - 1; | |
812 | ||
31ee4b2f | 813 | s390_adjust_jiffies(); |
b7ae9dd8 | 814 | preempt_disable(); |
1da177e4 LT |
815 | if (!n) { |
816 | seq_printf(m, "vendor_id : IBM/S390\n" | |
817 | "# processors : %i\n" | |
818 | "bogomips per cpu: %lu.%02lu\n", | |
819 | num_online_cpus(), loops_per_jiffy/(500000/HZ), | |
820 | (loops_per_jiffy/(5000/HZ))%100); | |
821 | } | |
822 | if (cpu_online(n)) { | |
823 | #ifdef CONFIG_SMP | |
824 | if (smp_processor_id() == n) | |
825 | cpuinfo = &S390_lowcore.cpu_data; | |
826 | else | |
827 | cpuinfo = &lowcore_ptr[n]->cpu_data; | |
828 | #else | |
829 | cpuinfo = &S390_lowcore.cpu_data; | |
830 | #endif | |
831 | seq_printf(m, "processor %li: " | |
832 | "version = %02X, " | |
833 | "identification = %06X, " | |
834 | "machine = %04X\n", | |
835 | n, cpuinfo->cpu_id.version, | |
836 | cpuinfo->cpu_id.ident, | |
837 | cpuinfo->cpu_id.machine); | |
838 | } | |
b7ae9dd8 | 839 | preempt_enable(); |
1da177e4 LT |
840 | return 0; |
841 | } | |
842 | ||
843 | static void *c_start(struct seq_file *m, loff_t *pos) | |
844 | { | |
845 | return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL; | |
846 | } | |
847 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
848 | { | |
849 | ++*pos; | |
850 | return c_start(m, pos); | |
851 | } | |
852 | static void c_stop(struct seq_file *m, void *v) | |
853 | { | |
854 | } | |
855 | struct seq_operations cpuinfo_op = { | |
856 | .start = c_start, | |
857 | .next = c_next, | |
858 | .stop = c_stop, | |
859 | .show = show_cpuinfo, | |
860 | }; | |
861 |