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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> |
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; | |
d4ee453b | 68 | EXPORT_SYMBOL(uaccess); |
d02765d1 | 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; |
cf8ba7a9 MS |
77 | unsigned long elf_hwcap = 0; |
78 | char elf_platform[ELF_PLATFORM_SIZE]; | |
36a2bd42 | 79 | |
2bc89b5e | 80 | struct mem_chunk __meminitdata memory_chunk[MEMORY_CHUNKS]; |
1da177e4 | 81 | volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ |
c9e37353 | 82 | static unsigned long __initdata memory_end; |
1da177e4 | 83 | |
1da177e4 LT |
84 | /* |
85 | * This is set up by the setup-routine at boot-time | |
86 | * for S390 need to find out, what we have to setup | |
87 | * using address 0x10400 ... | |
88 | */ | |
89 | ||
90 | #include <asm/setup.h> | |
91 | ||
1da177e4 LT |
92 | static struct resource code_resource = { |
93 | .name = "Kernel code", | |
94 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
95 | }; | |
96 | ||
97 | static struct resource data_resource = { | |
98 | .name = "Kernel data", | |
99 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
100 | }; | |
101 | ||
102 | /* | |
103 | * cpu_init() initializes state that is per-CPU. | |
104 | */ | |
ea1f4eec | 105 | void __cpuinit cpu_init(void) |
1da177e4 LT |
106 | { |
107 | int addr = hard_smp_processor_id(); | |
108 | ||
109 | /* | |
110 | * Store processor id in lowcore (used e.g. in timer_interrupt) | |
111 | */ | |
72960a02 | 112 | get_cpu_id(&S390_lowcore.cpu_data.cpu_id); |
1da177e4 LT |
113 | S390_lowcore.cpu_data.cpu_addr = addr; |
114 | ||
115 | /* | |
116 | * Force FPU initialization: | |
117 | */ | |
118 | clear_thread_flag(TIF_USEDFPU); | |
119 | clear_used_math(); | |
120 | ||
121 | atomic_inc(&init_mm.mm_count); | |
122 | current->active_mm = &init_mm; | |
123 | if (current->mm) | |
124 | BUG(); | |
125 | enter_lazy_tlb(&init_mm, current); | |
126 | } | |
127 | ||
1da177e4 LT |
128 | /* |
129 | * condev= and conmode= setup parameter. | |
130 | */ | |
131 | ||
132 | static int __init condev_setup(char *str) | |
133 | { | |
134 | int vdev; | |
135 | ||
136 | vdev = simple_strtoul(str, &str, 0); | |
137 | if (vdev >= 0 && vdev < 65536) { | |
138 | console_devno = vdev; | |
139 | console_irq = -1; | |
140 | } | |
141 | return 1; | |
142 | } | |
143 | ||
144 | __setup("condev=", condev_setup); | |
145 | ||
146 | static int __init conmode_setup(char *str) | |
147 | { | |
148 | #if defined(CONFIG_SCLP_CONSOLE) | |
149 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) | |
150 | SET_CONSOLE_SCLP; | |
151 | #endif | |
152 | #if defined(CONFIG_TN3215_CONSOLE) | |
153 | if (strncmp(str, "3215", 5) == 0) | |
154 | SET_CONSOLE_3215; | |
155 | #endif | |
156 | #if defined(CONFIG_TN3270_CONSOLE) | |
157 | if (strncmp(str, "3270", 5) == 0) | |
158 | SET_CONSOLE_3270; | |
159 | #endif | |
160 | return 1; | |
161 | } | |
162 | ||
163 | __setup("conmode=", conmode_setup); | |
164 | ||
165 | static void __init conmode_default(void) | |
166 | { | |
167 | char query_buffer[1024]; | |
168 | char *ptr; | |
169 | ||
170 | if (MACHINE_IS_VM) { | |
740b5706 | 171 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
172 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
173 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
174 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
740b5706 | 175 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
176 | ptr = strstr(query_buffer, "CONMODE"); |
177 | /* | |
178 | * Set the conmode to 3215 so that the device recognition | |
179 | * will set the cu_type of the console to 3215. If the | |
180 | * conmode is 3270 and we don't set it back then both | |
181 | * 3215 and the 3270 driver will try to access the console | |
182 | * device (3215 as console and 3270 as normal tty). | |
183 | */ | |
740b5706 | 184 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 LT |
185 | if (ptr == NULL) { |
186 | #if defined(CONFIG_SCLP_CONSOLE) | |
187 | SET_CONSOLE_SCLP; | |
188 | #endif | |
189 | return; | |
190 | } | |
191 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
192 | #if defined(CONFIG_TN3270_CONSOLE) | |
193 | SET_CONSOLE_3270; | |
194 | #elif defined(CONFIG_TN3215_CONSOLE) | |
195 | SET_CONSOLE_3215; | |
196 | #elif defined(CONFIG_SCLP_CONSOLE) | |
197 | SET_CONSOLE_SCLP; | |
198 | #endif | |
199 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
200 | #if defined(CONFIG_TN3215_CONSOLE) | |
201 | SET_CONSOLE_3215; | |
202 | #elif defined(CONFIG_TN3270_CONSOLE) | |
203 | SET_CONSOLE_3270; | |
204 | #elif defined(CONFIG_SCLP_CONSOLE) | |
205 | SET_CONSOLE_SCLP; | |
206 | #endif | |
207 | } | |
208 | } else if (MACHINE_IS_P390) { | |
209 | #if defined(CONFIG_TN3215_CONSOLE) | |
210 | SET_CONSOLE_3215; | |
211 | #elif defined(CONFIG_TN3270_CONSOLE) | |
212 | SET_CONSOLE_3270; | |
213 | #endif | |
214 | } else { | |
215 | #if defined(CONFIG_SCLP_CONSOLE) | |
216 | SET_CONSOLE_SCLP; | |
217 | #endif | |
218 | } | |
219 | } | |
220 | ||
411ed322 MH |
221 | #if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE) |
222 | static void __init setup_zfcpdump(unsigned int console_devno) | |
223 | { | |
224 | static char str[64]; | |
225 | ||
226 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) | |
227 | return; | |
228 | if (console_devno != -1) | |
229 | sprintf(str, "cio_ignore=all,!0.0.%04x,!0.0.%04x", | |
230 | ipl_info.data.fcp.dev_id.devno, console_devno); | |
231 | else | |
232 | sprintf(str, "cio_ignore=all,!0.0.%04x", | |
233 | ipl_info.data.fcp.dev_id.devno); | |
0a71a312 | 234 | strcat(COMMAND_LINE, " "); |
411ed322 MH |
235 | strcat(COMMAND_LINE, str); |
236 | console_loglevel = 2; | |
237 | } | |
238 | #else | |
239 | static inline void setup_zfcpdump(unsigned int console_devno) {} | |
240 | #endif /* CONFIG_ZFCPDUMP */ | |
241 | ||
1da177e4 LT |
242 | /* |
243 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
244 | * _machine_halt or _machine_power_off. | |
245 | */ | |
246 | ||
247 | void machine_restart(char *command) | |
248 | { | |
7aa8dac7 | 249 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
06fa46a2 MS |
250 | /* |
251 | * Only unblank the console if we are called in enabled | |
252 | * context or a bust_spinlocks cleared the way for us. | |
253 | */ | |
254 | console_unblank(); | |
1da177e4 LT |
255 | _machine_restart(command); |
256 | } | |
257 | ||
1da177e4 LT |
258 | void machine_halt(void) |
259 | { | |
06fa46a2 MS |
260 | if (!in_interrupt() || oops_in_progress) |
261 | /* | |
262 | * Only unblank the console if we are called in enabled | |
263 | * context or a bust_spinlocks cleared the way for us. | |
264 | */ | |
265 | console_unblank(); | |
1da177e4 LT |
266 | _machine_halt(); |
267 | } | |
268 | ||
1da177e4 LT |
269 | void machine_power_off(void) |
270 | { | |
06fa46a2 MS |
271 | if (!in_interrupt() || oops_in_progress) |
272 | /* | |
273 | * Only unblank the console if we are called in enabled | |
274 | * context or a bust_spinlocks cleared the way for us. | |
275 | */ | |
276 | console_unblank(); | |
1da177e4 LT |
277 | _machine_power_off(); |
278 | } | |
279 | ||
53df751c MS |
280 | /* |
281 | * Dummy power off function. | |
282 | */ | |
283 | void (*pm_power_off)(void) = machine_power_off; | |
284 | ||
59685296 HC |
285 | static int __init early_parse_mem(char *p) |
286 | { | |
287 | memory_end = memparse(p, &p); | |
288 | return 0; | |
289 | } | |
290 | early_param("mem", early_parse_mem); | |
291 | ||
292 | /* | |
293 | * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes | |
294 | */ | |
295 | static int __init early_parse_ipldelay(char *p) | |
c9e37353 | 296 | { |
c9e37353 | 297 | unsigned long delay = 0; |
1da177e4 | 298 | |
59685296 | 299 | delay = simple_strtoul(p, &p, 0); |
1da177e4 | 300 | |
59685296 HC |
301 | switch (*p) { |
302 | case 's': | |
303 | case 'S': | |
304 | delay *= 1000000; | |
305 | break; | |
306 | case 'm': | |
307 | case 'M': | |
308 | delay *= 60 * 1000000; | |
c9e37353 | 309 | } |
59685296 HC |
310 | |
311 | /* now wait for the requested amount of time */ | |
312 | udelay(delay); | |
313 | ||
314 | return 0; | |
c9e37353 | 315 | } |
59685296 | 316 | early_param("ipldelay", early_parse_ipldelay); |
c9e37353 | 317 | |
c1821c2e GS |
318 | #ifdef CONFIG_S390_SWITCH_AMODE |
319 | unsigned int switch_amode = 0; | |
320 | EXPORT_SYMBOL_GPL(switch_amode); | |
321 | ||
4d284cac HC |
322 | static void set_amode_and_uaccess(unsigned long user_amode, |
323 | unsigned long user32_amode) | |
c1821c2e GS |
324 | { |
325 | psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode | | |
326 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
327 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
328 | #ifdef CONFIG_COMPAT | |
329 | psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode | | |
330 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
331 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
332 | psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode | | |
333 | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | | |
334 | PSW32_MASK_PSTATE; | |
335 | #endif | |
336 | psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | | |
337 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY; | |
338 | ||
339 | if (MACHINE_HAS_MVCOS) { | |
340 | printk("mvcos available.\n"); | |
341 | memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); | |
342 | } else { | |
343 | printk("mvcos not available.\n"); | |
344 | memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); | |
345 | } | |
346 | } | |
347 | ||
348 | /* | |
349 | * Switch kernel/user addressing modes? | |
350 | */ | |
351 | static int __init early_parse_switch_amode(char *p) | |
352 | { | |
353 | switch_amode = 1; | |
354 | return 0; | |
355 | } | |
356 | early_param("switch_amode", early_parse_switch_amode); | |
357 | ||
358 | #else /* CONFIG_S390_SWITCH_AMODE */ | |
359 | static inline void set_amode_and_uaccess(unsigned long user_amode, | |
360 | unsigned long user32_amode) | |
361 | { | |
362 | } | |
363 | #endif /* CONFIG_S390_SWITCH_AMODE */ | |
364 | ||
365 | #ifdef CONFIG_S390_EXEC_PROTECT | |
366 | unsigned int s390_noexec = 0; | |
367 | EXPORT_SYMBOL_GPL(s390_noexec); | |
368 | ||
369 | /* | |
370 | * Enable execute protection? | |
371 | */ | |
372 | static int __init early_parse_noexec(char *p) | |
373 | { | |
374 | if (!strncmp(p, "off", 3)) | |
375 | return 0; | |
376 | switch_amode = 1; | |
377 | s390_noexec = 1; | |
378 | return 0; | |
379 | } | |
380 | early_param("noexec", early_parse_noexec); | |
381 | #endif /* CONFIG_S390_EXEC_PROTECT */ | |
382 | ||
383 | static void setup_addressing_mode(void) | |
384 | { | |
385 | if (s390_noexec) { | |
386 | printk("S390 execute protection active, "); | |
387 | set_amode_and_uaccess(PSW_ASC_SECONDARY, PSW32_ASC_SECONDARY); | |
7af0d6f7 | 388 | } else if (switch_amode) { |
c1821c2e GS |
389 | printk("S390 address spaces switched, "); |
390 | set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY); | |
391 | } | |
411788ea HC |
392 | #ifdef CONFIG_TRACE_IRQFLAGS |
393 | sysc_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; | |
394 | io_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; | |
395 | #endif | |
c1821c2e GS |
396 | } |
397 | ||
c9e37353 HC |
398 | static void __init |
399 | setup_lowcore(void) | |
400 | { | |
401 | struct _lowcore *lc; | |
402 | int lc_pages; | |
403 | ||
404 | /* | |
405 | * Setup lowcore for boot cpu | |
406 | */ | |
407 | lc_pages = sizeof(void *) == 8 ? 2 : 1; | |
408 | lc = (struct _lowcore *) | |
409 | __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); | |
410 | memset(lc, 0, lc_pages * PAGE_SIZE); | |
0b642ede | 411 | lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; |
c9e37353 HC |
412 | lc->restart_psw.addr = |
413 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; | |
c1821c2e GS |
414 | if (switch_amode) |
415 | lc->restart_psw.mask |= PSW_ASC_HOME; | |
416 | lc->external_new_psw.mask = psw_kernel_bits; | |
c9e37353 HC |
417 | lc->external_new_psw.addr = |
418 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
c1821c2e | 419 | lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_IO | PSW_MASK_EXT; |
c9e37353 | 420 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
c1821c2e | 421 | lc->program_new_psw.mask = psw_kernel_bits; |
c9e37353 HC |
422 | lc->program_new_psw.addr = |
423 | PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; | |
77fa2245 | 424 | lc->mcck_new_psw.mask = |
c1821c2e | 425 | psw_kernel_bits & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; |
c9e37353 HC |
426 | lc->mcck_new_psw.addr = |
427 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
c1821c2e | 428 | lc->io_new_psw.mask = psw_kernel_bits; |
c9e37353 HC |
429 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
430 | lc->ipl_device = S390_lowcore.ipl_device; | |
431 | lc->jiffy_timer = -1LL; | |
432 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; | |
433 | lc->async_stack = (unsigned long) | |
434 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; | |
c9e37353 HC |
435 | lc->panic_stack = (unsigned long) |
436 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; | |
c9e37353 HC |
437 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
438 | lc->thread_info = (unsigned long) &init_thread_union; | |
347a8dc3 | 439 | #ifndef CONFIG_64BIT |
77fa2245 HC |
440 | if (MACHINE_HAS_IEEE) { |
441 | lc->extended_save_area_addr = (__u32) | |
442 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0); | |
443 | /* enable extended save area */ | |
c4972f33 | 444 | __ctl_set_bit(14, 29); |
77fa2245 HC |
445 | } |
446 | #endif | |
c9e37353 HC |
447 | set_prefix((u32)(unsigned long) lc); |
448 | } | |
449 | ||
450 | static void __init | |
451 | setup_resources(void) | |
452 | { | |
fe355b7f | 453 | struct resource *res, *sub_res; |
c9e37353 HC |
454 | int i; |
455 | ||
cc13ad62 HC |
456 | code_resource.start = (unsigned long) &_text; |
457 | code_resource.end = (unsigned long) &_etext - 1; | |
458 | data_resource.start = (unsigned long) &_etext; | |
459 | data_resource.end = (unsigned long) &_edata - 1; | |
460 | ||
9f4b0ba8 HC |
461 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
462 | if (!memory_chunk[i].size) | |
463 | continue; | |
c9e37353 HC |
464 | res = alloc_bootmem_low(sizeof(struct resource)); |
465 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; | |
466 | switch (memory_chunk[i].type) { | |
467 | case CHUNK_READ_WRITE: | |
468 | res->name = "System RAM"; | |
469 | break; | |
470 | case CHUNK_READ_ONLY: | |
471 | res->name = "System ROM"; | |
472 | res->flags |= IORESOURCE_READONLY; | |
473 | break; | |
474 | default: | |
475 | res->name = "reserved"; | |
476 | } | |
477 | res->start = memory_chunk[i].addr; | |
478 | res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; | |
479 | request_resource(&iomem_resource, res); | |
fe355b7f HY |
480 | |
481 | if (code_resource.start >= res->start && | |
482 | code_resource.start <= res->end && | |
483 | code_resource.end > res->end) { | |
484 | sub_res = alloc_bootmem_low(sizeof(struct resource)); | |
485 | memcpy(sub_res, &code_resource, | |
486 | sizeof(struct resource)); | |
487 | sub_res->end = res->end; | |
488 | code_resource.start = res->end + 1; | |
489 | request_resource(res, sub_res); | |
490 | } | |
491 | ||
492 | if (code_resource.start >= res->start && | |
493 | code_resource.start <= res->end && | |
494 | code_resource.end <= res->end) | |
495 | request_resource(res, &code_resource); | |
496 | ||
497 | if (data_resource.start >= res->start && | |
498 | data_resource.start <= res->end && | |
499 | data_resource.end > res->end) { | |
500 | sub_res = alloc_bootmem_low(sizeof(struct resource)); | |
501 | memcpy(sub_res, &data_resource, | |
502 | sizeof(struct resource)); | |
503 | sub_res->end = res->end; | |
504 | data_resource.start = res->end + 1; | |
505 | request_resource(res, sub_res); | |
506 | } | |
507 | ||
508 | if (data_resource.start >= res->start && | |
509 | data_resource.start <= res->end && | |
510 | data_resource.end <= res->end) | |
511 | request_resource(res, &data_resource); | |
c9e37353 HC |
512 | } |
513 | } | |
514 | ||
411ed322 MH |
515 | unsigned long real_memory_size; |
516 | EXPORT_SYMBOL_GPL(real_memory_size); | |
517 | ||
8b62bc96 HC |
518 | static void __init setup_memory_end(void) |
519 | { | |
411ed322 | 520 | unsigned long memory_size; |
5fd9c6e2 | 521 | unsigned long max_mem; |
8b62bc96 HC |
522 | int i; |
523 | ||
411ed322 MH |
524 | #if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE) |
525 | if (ipl_info.type == IPL_TYPE_FCP_DUMP) | |
526 | memory_end = ZFCPDUMP_HSA_SIZE; | |
527 | #endif | |
528 | memory_size = 0; | |
8b62bc96 HC |
529 | memory_end &= PAGE_MASK; |
530 | ||
5fd9c6e2 CB |
531 | max_mem = memory_end ? min(VMALLOC_START, memory_end) : VMALLOC_START; |
532 | memory_end = min(max_mem, memory_end); | |
8b62bc96 | 533 | |
9f4b0ba8 HC |
534 | /* |
535 | * Make sure all chunks are MAX_ORDER aligned so we don't need the | |
536 | * extra checks that HOLES_IN_ZONE would require. | |
537 | */ | |
538 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
539 | unsigned long start, end; | |
540 | struct mem_chunk *chunk; | |
541 | unsigned long align; | |
542 | ||
543 | chunk = &memory_chunk[i]; | |
544 | align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); | |
545 | start = (chunk->addr + align - 1) & ~(align - 1); | |
546 | end = (chunk->addr + chunk->size) & ~(align - 1); | |
547 | if (start >= end) | |
548 | memset(chunk, 0, sizeof(*chunk)); | |
549 | else { | |
550 | chunk->addr = start; | |
551 | chunk->size = end - start; | |
552 | } | |
553 | } | |
554 | ||
8b62bc96 HC |
555 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
556 | struct mem_chunk *chunk = &memory_chunk[i]; | |
557 | ||
411ed322 MH |
558 | real_memory_size = max(real_memory_size, |
559 | chunk->addr + chunk->size); | |
8b62bc96 HC |
560 | if (chunk->addr >= max_mem) { |
561 | memset(chunk, 0, sizeof(*chunk)); | |
562 | continue; | |
563 | } | |
564 | if (chunk->addr + chunk->size > max_mem) | |
565 | chunk->size = max_mem - chunk->addr; | |
566 | memory_size = max(memory_size, chunk->addr + chunk->size); | |
567 | } | |
568 | if (!memory_end) | |
569 | memory_end = memory_size; | |
8b62bc96 HC |
570 | } |
571 | ||
c9e37353 HC |
572 | static void __init |
573 | setup_memory(void) | |
574 | { | |
575 | unsigned long bootmap_size; | |
fe355b7f | 576 | unsigned long start_pfn, end_pfn; |
c9e37353 | 577 | int i; |
1da177e4 LT |
578 | |
579 | /* | |
580 | * partially used pages are not usable - thus | |
581 | * we are rounding upwards: | |
582 | */ | |
65912a84 HC |
583 | start_pfn = PFN_UP(__pa(&_end)); |
584 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 585 | |
65912a84 HC |
586 | #ifdef CONFIG_BLK_DEV_INITRD |
587 | /* | |
588 | * Move the initrd in case the bitmap of the bootmem allocater | |
589 | * would overwrite it. | |
590 | */ | |
591 | ||
592 | if (INITRD_START && INITRD_SIZE) { | |
593 | unsigned long bmap_size; | |
594 | unsigned long start; | |
595 | ||
596 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
597 | bmap_size = PFN_PHYS(bmap_size); | |
598 | ||
599 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
600 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
601 | ||
602 | if (start + INITRD_SIZE > memory_end) { | |
603 | printk("initrd extends beyond end of memory " | |
604 | "(0x%08lx > 0x%08lx)\n" | |
605 | "disabling initrd\n", | |
606 | start + INITRD_SIZE, memory_end); | |
607 | INITRD_START = INITRD_SIZE = 0; | |
608 | } else { | |
609 | printk("Moving initrd (0x%08lx -> 0x%08lx, " | |
610 | "size: %ld)\n", | |
611 | INITRD_START, start, INITRD_SIZE); | |
612 | memmove((void *) start, (void *) INITRD_START, | |
613 | INITRD_SIZE); | |
614 | INITRD_START = start; | |
615 | } | |
616 | } | |
617 | } | |
618 | #endif | |
619 | ||
1da177e4 | 620 | /* |
7676bef9 | 621 | * Initialize the boot-time allocator |
1da177e4 LT |
622 | */ |
623 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
624 | ||
625 | /* | |
626 | * Register RAM areas with the bootmem allocator. | |
627 | */ | |
c9e37353 | 628 | |
0b642ede | 629 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
39b742f9 | 630 | unsigned long start_chunk, end_chunk, pfn; |
1da177e4 LT |
631 | |
632 | if (memory_chunk[i].type != CHUNK_READ_WRITE) | |
633 | continue; | |
39b742f9 HC |
634 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
635 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size) - 1; | |
636 | end_chunk = min(end_chunk, end_pfn); | |
637 | if (start_chunk >= end_chunk) | |
638 | continue; | |
639 | add_active_range(0, start_chunk, end_chunk); | |
640 | pfn = max(start_chunk, start_pfn); | |
641 | for (; pfn <= end_chunk; pfn++) | |
642 | page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY); | |
1da177e4 LT |
643 | } |
644 | ||
0b642ede PO |
645 | psw_set_key(PAGE_DEFAULT_KEY); |
646 | ||
39b742f9 | 647 | free_bootmem_with_active_regions(0, max_pfn); |
c9e37353 | 648 | |
615b04b3 HC |
649 | /* |
650 | * Reserve memory used for lowcore/command line/kernel image. | |
651 | */ | |
652 | reserve_bootmem(0, (unsigned long)_ehead); | |
653 | reserve_bootmem((unsigned long)_stext, | |
654 | PFN_PHYS(start_pfn) - (unsigned long)_stext); | |
c9e37353 HC |
655 | /* |
656 | * Reserve the bootmem bitmap itself as well. We do this in two | |
657 | * steps (first step was init_bootmem()) because this catches | |
658 | * the (very unlikely) case of us accidentally initializing the | |
659 | * bootmem allocator with an invalid RAM area. | |
660 | */ | |
661 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size); | |
1da177e4 LT |
662 | |
663 | #ifdef CONFIG_BLK_DEV_INITRD | |
65912a84 | 664 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 LT |
665 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
666 | reserve_bootmem(INITRD_START, INITRD_SIZE); | |
667 | initrd_start = INITRD_START; | |
668 | initrd_end = initrd_start + INITRD_SIZE; | |
669 | } else { | |
c9e37353 HC |
670 | printk("initrd extends beyond end of memory " |
671 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
672 | initrd_start + INITRD_SIZE, memory_end); | |
673 | initrd_start = initrd_end = 0; | |
1da177e4 | 674 | } |
c9e37353 | 675 | } |
1da177e4 | 676 | #endif |
c9e37353 | 677 | } |
1da177e4 | 678 | |
cf8ba7a9 MS |
679 | static __init unsigned int stfl(void) |
680 | { | |
681 | asm volatile( | |
682 | " .insn s,0xb2b10000,0(0)\n" /* stfl */ | |
683 | "0:\n" | |
684 | EX_TABLE(0b,0b)); | |
685 | return S390_lowcore.stfl_fac_list; | |
686 | } | |
687 | ||
688 | static __init int stfle(unsigned long long *list, int doublewords) | |
689 | { | |
690 | typedef struct { unsigned long long _[doublewords]; } addrtype; | |
691 | register unsigned long __nr asm("0") = doublewords - 1; | |
692 | ||
693 | asm volatile(".insn s,0xb2b00000,%0" /* stfle */ | |
694 | : "=m" (*(addrtype *) list), "+d" (__nr) : : "cc"); | |
695 | return __nr + 1; | |
696 | } | |
697 | ||
698 | /* | |
699 | * Setup hardware capabilities. | |
700 | */ | |
701 | static void __init setup_hwcaps(void) | |
702 | { | |
703 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; | |
704 | struct cpuinfo_S390 *cpuinfo = &S390_lowcore.cpu_data; | |
705 | unsigned long long facility_list_extended; | |
706 | unsigned int facility_list; | |
707 | int i; | |
708 | ||
709 | facility_list = stfl(); | |
710 | /* | |
711 | * The store facility list bits numbers as found in the principles | |
712 | * of operation are numbered with bit 1UL<<31 as number 0 to | |
713 | * bit 1UL<<0 as number 31. | |
714 | * Bit 0: instructions named N3, "backported" to esa-mode | |
715 | * Bit 2: z/Architecture mode is active | |
716 | * Bit 7: the store-facility-list-extended facility is installed | |
717 | * Bit 17: the message-security assist is installed | |
718 | * Bit 19: the long-displacement facility is installed | |
719 | * Bit 21: the extended-immediate facility is installed | |
720 | * These get translated to: | |
721 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, | |
722 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, | |
723 | * HWCAP_S390_LDISP bit 4, and HWCAP_S390_EIMM bit 5. | |
724 | */ | |
725 | for (i = 0; i < 6; i++) | |
726 | if (facility_list & (1UL << (31 - stfl_bits[i]))) | |
727 | elf_hwcap |= 1UL << i; | |
728 | ||
729 | /* | |
730 | * Check for additional facilities with store-facility-list-extended. | |
731 | * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 | |
732 | * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information | |
733 | * as stored by stfl, bits 32-xxx contain additional facilities. | |
734 | * How many facility words are stored depends on the number of | |
735 | * doublewords passed to the instruction. The additional facilites | |
736 | * are: | |
737 | * Bit 43: decimal floating point facility is installed | |
738 | * translated to: | |
739 | * HWCAP_S390_DFP bit 6. | |
740 | */ | |
741 | if ((elf_hwcap & (1UL << 2)) && | |
742 | stfle(&facility_list_extended, 1) > 0) { | |
743 | if (facility_list_extended & (1ULL << (64 - 43))) | |
744 | elf_hwcap |= 1UL << 6; | |
745 | } | |
746 | ||
747 | switch (cpuinfo->cpu_id.machine) { | |
748 | case 0x9672: | |
749 | #if !defined(CONFIG_64BIT) | |
750 | default: /* Use "g5" as default for 31 bit kernels. */ | |
751 | #endif | |
752 | strcpy(elf_platform, "g5"); | |
753 | break; | |
754 | case 0x2064: | |
755 | case 0x2066: | |
756 | #if defined(CONFIG_64BIT) | |
757 | default: /* Use "z900" as default for 64 bit kernels. */ | |
758 | #endif | |
759 | strcpy(elf_platform, "z900"); | |
760 | break; | |
761 | case 0x2084: | |
762 | case 0x2086: | |
763 | strcpy(elf_platform, "z990"); | |
764 | break; | |
765 | case 0x2094: | |
766 | strcpy(elf_platform, "z9-109"); | |
767 | break; | |
768 | } | |
769 | } | |
770 | ||
c9e37353 HC |
771 | /* |
772 | * Setup function called from init/main.c just after the banner | |
773 | * was printed. | |
774 | */ | |
1da177e4 | 775 | |
c9e37353 HC |
776 | void __init |
777 | setup_arch(char **cmdline_p) | |
778 | { | |
1da177e4 | 779 | /* |
c9e37353 | 780 | * print what head.S has found out about the machine |
1da177e4 | 781 | */ |
347a8dc3 | 782 | #ifndef CONFIG_64BIT |
c9e37353 HC |
783 | printk((MACHINE_IS_VM) ? |
784 | "We are running under VM (31 bit mode)\n" : | |
785 | "We are running native (31 bit mode)\n"); | |
786 | printk((MACHINE_HAS_IEEE) ? | |
787 | "This machine has an IEEE fpu\n" : | |
788 | "This machine has no IEEE fpu\n"); | |
347a8dc3 | 789 | #else /* CONFIG_64BIT */ |
c9e37353 HC |
790 | printk((MACHINE_IS_VM) ? |
791 | "We are running under VM (64 bit mode)\n" : | |
792 | "We are running native (64 bit mode)\n"); | |
347a8dc3 | 793 | #endif /* CONFIG_64BIT */ |
c9e37353 | 794 | |
59685296 | 795 | /* Save unparsed command line copy for /proc/cmdline */ |
e06b1a35 | 796 | strlcpy(boot_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); |
59685296 HC |
797 | |
798 | *cmdline_p = COMMAND_LINE; | |
799 | *(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0'; | |
800 | ||
c9e37353 | 801 | ROOT_DEV = Root_RAM0; |
59685296 HC |
802 | |
803 | init_mm.start_code = PAGE_OFFSET; | |
804 | init_mm.end_code = (unsigned long) &_etext; | |
805 | init_mm.end_data = (unsigned long) &_edata; | |
806 | init_mm.brk = (unsigned long) &_end; | |
807 | ||
6c2a9e6d GS |
808 | if (MACHINE_HAS_MVCOS) |
809 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); | |
810 | else | |
811 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); | |
812 | ||
59685296 HC |
813 | parse_early_param(); |
814 | ||
99ca4e58 | 815 | setup_ipl(); |
8b62bc96 | 816 | setup_memory_end(); |
c1821c2e | 817 | setup_addressing_mode(); |
c9e37353 HC |
818 | setup_memory(); |
819 | setup_resources(); | |
820 | setup_lowcore(); | |
821 | ||
1da177e4 LT |
822 | cpu_init(); |
823 | __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr; | |
824 | ||
cf8ba7a9 MS |
825 | /* |
826 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). | |
827 | */ | |
828 | setup_hwcaps(); | |
829 | ||
1da177e4 LT |
830 | /* |
831 | * Create kernel page tables and switch to virtual addressing. | |
832 | */ | |
833 | paging_init(); | |
834 | ||
835 | /* Setup default console */ | |
836 | conmode_default(); | |
411ed322 MH |
837 | |
838 | /* Setup zfcpdump support */ | |
839 | setup_zfcpdump(console_devno); | |
1da177e4 LT |
840 | } |
841 | ||
ea1f4eec | 842 | void __cpuinit print_cpu_info(struct cpuinfo_S390 *cpuinfo) |
1da177e4 | 843 | { |
08d07968 | 844 | printk(KERN_INFO "cpu %d " |
1da177e4 LT |
845 | #ifdef CONFIG_SMP |
846 | "phys_idx=%d " | |
847 | #endif | |
848 | "vers=%02X ident=%06X machine=%04X unused=%04X\n", | |
849 | cpuinfo->cpu_nr, | |
850 | #ifdef CONFIG_SMP | |
851 | cpuinfo->cpu_addr, | |
852 | #endif | |
853 | cpuinfo->cpu_id.version, | |
854 | cpuinfo->cpu_id.ident, | |
855 | cpuinfo->cpu_id.machine, | |
856 | cpuinfo->cpu_id.unused); | |
857 | } | |
858 | ||
859 | /* | |
860 | * show_cpuinfo - Get information on one CPU for use by procfs. | |
861 | */ | |
862 | ||
863 | static int show_cpuinfo(struct seq_file *m, void *v) | |
864 | { | |
cf8ba7a9 MS |
865 | static const char *hwcap_str[7] = { |
866 | "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp" | |
867 | }; | |
1da177e4 LT |
868 | struct cpuinfo_S390 *cpuinfo; |
869 | unsigned long n = (unsigned long) v - 1; | |
cf8ba7a9 | 870 | int i; |
1da177e4 | 871 | |
31ee4b2f | 872 | s390_adjust_jiffies(); |
b7ae9dd8 | 873 | preempt_disable(); |
1da177e4 LT |
874 | if (!n) { |
875 | seq_printf(m, "vendor_id : IBM/S390\n" | |
876 | "# processors : %i\n" | |
877 | "bogomips per cpu: %lu.%02lu\n", | |
878 | num_online_cpus(), loops_per_jiffy/(500000/HZ), | |
879 | (loops_per_jiffy/(5000/HZ))%100); | |
cf8ba7a9 MS |
880 | seq_puts(m, "features\t: "); |
881 | for (i = 0; i < 7; i++) | |
882 | if (hwcap_str[i] && (elf_hwcap & (1UL << i))) | |
883 | seq_printf(m, "%s ", hwcap_str[i]); | |
884 | seq_puts(m, "\n"); | |
1da177e4 | 885 | } |
cf8ba7a9 | 886 | |
1da177e4 LT |
887 | if (cpu_online(n)) { |
888 | #ifdef CONFIG_SMP | |
889 | if (smp_processor_id() == n) | |
890 | cpuinfo = &S390_lowcore.cpu_data; | |
891 | else | |
892 | cpuinfo = &lowcore_ptr[n]->cpu_data; | |
893 | #else | |
894 | cpuinfo = &S390_lowcore.cpu_data; | |
895 | #endif | |
896 | seq_printf(m, "processor %li: " | |
897 | "version = %02X, " | |
898 | "identification = %06X, " | |
899 | "machine = %04X\n", | |
900 | n, cpuinfo->cpu_id.version, | |
901 | cpuinfo->cpu_id.ident, | |
902 | cpuinfo->cpu_id.machine); | |
903 | } | |
b7ae9dd8 | 904 | preempt_enable(); |
1da177e4 LT |
905 | return 0; |
906 | } | |
907 | ||
908 | static void *c_start(struct seq_file *m, loff_t *pos) | |
909 | { | |
910 | return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL; | |
911 | } | |
912 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
913 | { | |
914 | ++*pos; | |
915 | return c_start(m, pos); | |
916 | } | |
917 | static void c_stop(struct seq_file *m, void *v) | |
918 | { | |
919 | } | |
5c81cdbe | 920 | const struct seq_operations cpuinfo_op = { |
1da177e4 LT |
921 | .start = c_start, |
922 | .next = c_next, | |
923 | .stop = c_stop, | |
924 | .show = show_cpuinfo, | |
925 | }; | |
926 |