]>
Commit | Line | Data |
---|---|---|
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> | |
31 | #include <linux/config.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/initrd.h> | |
34 | #include <linux/bootmem.h> | |
35 | #include <linux/root_dev.h> | |
36 | #include <linux/console.h> | |
37 | #include <linux/seq_file.h> | |
38 | #include <linux/kernel_stat.h> | |
1e8e3383 | 39 | #include <linux/device.h> |
1da177e4 LT |
40 | |
41 | #include <asm/uaccess.h> | |
42 | #include <asm/system.h> | |
43 | #include <asm/smp.h> | |
44 | #include <asm/mmu_context.h> | |
45 | #include <asm/cpcmd.h> | |
46 | #include <asm/lowcore.h> | |
47 | #include <asm/irq.h> | |
0b642ede PO |
48 | #include <asm/page.h> |
49 | #include <asm/ptrace.h> | |
1da177e4 LT |
50 | |
51 | /* | |
52 | * Machine setup.. | |
53 | */ | |
54 | unsigned int console_mode = 0; | |
55 | unsigned int console_devno = -1; | |
56 | unsigned int console_irq = -1; | |
57 | unsigned long memory_size = 0; | |
58 | unsigned long machine_flags = 0; | |
1da177e4 LT |
59 | struct { |
60 | unsigned long addr, size, type; | |
61 | } memory_chunk[MEMORY_CHUNKS] = { { 0 } }; | |
62 | #define CHUNK_READ_WRITE 0 | |
63 | #define CHUNK_READ_ONLY 1 | |
64 | volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ | |
c9e37353 HC |
65 | unsigned long __initdata zholes_size[MAX_NR_ZONES]; |
66 | static unsigned long __initdata memory_end; | |
1da177e4 LT |
67 | |
68 | /* | |
69 | * Setup options | |
70 | */ | |
71 | extern int _text,_etext, _edata, _end; | |
72 | ||
73 | /* | |
74 | * This is set up by the setup-routine at boot-time | |
75 | * for S390 need to find out, what we have to setup | |
76 | * using address 0x10400 ... | |
77 | */ | |
78 | ||
79 | #include <asm/setup.h> | |
80 | ||
81 | static char command_line[COMMAND_LINE_SIZE] = { 0, }; | |
82 | ||
83 | static struct resource code_resource = { | |
84 | .name = "Kernel code", | |
c9e37353 HC |
85 | .start = (unsigned long) &_text, |
86 | .end = (unsigned long) &_etext - 1, | |
1da177e4 LT |
87 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
88 | }; | |
89 | ||
90 | static struct resource data_resource = { | |
91 | .name = "Kernel data", | |
c9e37353 HC |
92 | .start = (unsigned long) &_etext, |
93 | .end = (unsigned long) &_edata - 1, | |
1da177e4 LT |
94 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
95 | }; | |
96 | ||
97 | /* | |
98 | * cpu_init() initializes state that is per-CPU. | |
99 | */ | |
100 | void __devinit cpu_init (void) | |
101 | { | |
102 | int addr = hard_smp_processor_id(); | |
103 | ||
104 | /* | |
105 | * Store processor id in lowcore (used e.g. in timer_interrupt) | |
106 | */ | |
107 | asm volatile ("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id)); | |
108 | S390_lowcore.cpu_data.cpu_addr = addr; | |
109 | ||
110 | /* | |
111 | * Force FPU initialization: | |
112 | */ | |
113 | clear_thread_flag(TIF_USEDFPU); | |
114 | clear_used_math(); | |
115 | ||
116 | atomic_inc(&init_mm.mm_count); | |
117 | current->active_mm = &init_mm; | |
118 | if (current->mm) | |
119 | BUG(); | |
120 | enter_lazy_tlb(&init_mm, current); | |
121 | } | |
122 | ||
123 | /* | |
124 | * VM halt and poweroff setup routines | |
125 | */ | |
126 | char vmhalt_cmd[128] = ""; | |
127 | char vmpoff_cmd[128] = ""; | |
128 | ||
129 | static inline void strncpy_skip_quote(char *dst, char *src, int n) | |
130 | { | |
131 | int sx, dx; | |
132 | ||
133 | dx = 0; | |
134 | for (sx = 0; src[sx] != 0; sx++) { | |
135 | if (src[sx] == '"') continue; | |
136 | dst[dx++] = src[sx]; | |
137 | if (dx >= n) break; | |
138 | } | |
139 | } | |
140 | ||
141 | static int __init vmhalt_setup(char *str) | |
142 | { | |
143 | strncpy_skip_quote(vmhalt_cmd, str, 127); | |
144 | vmhalt_cmd[127] = 0; | |
145 | return 1; | |
146 | } | |
147 | ||
148 | __setup("vmhalt=", vmhalt_setup); | |
149 | ||
150 | static int __init vmpoff_setup(char *str) | |
151 | { | |
152 | strncpy_skip_quote(vmpoff_cmd, str, 127); | |
153 | vmpoff_cmd[127] = 0; | |
154 | return 1; | |
155 | } | |
156 | ||
157 | __setup("vmpoff=", vmpoff_setup); | |
158 | ||
159 | /* | |
160 | * condev= and conmode= setup parameter. | |
161 | */ | |
162 | ||
163 | static int __init condev_setup(char *str) | |
164 | { | |
165 | int vdev; | |
166 | ||
167 | vdev = simple_strtoul(str, &str, 0); | |
168 | if (vdev >= 0 && vdev < 65536) { | |
169 | console_devno = vdev; | |
170 | console_irq = -1; | |
171 | } | |
172 | return 1; | |
173 | } | |
174 | ||
175 | __setup("condev=", condev_setup); | |
176 | ||
177 | static int __init conmode_setup(char *str) | |
178 | { | |
179 | #if defined(CONFIG_SCLP_CONSOLE) | |
180 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) | |
181 | SET_CONSOLE_SCLP; | |
182 | #endif | |
183 | #if defined(CONFIG_TN3215_CONSOLE) | |
184 | if (strncmp(str, "3215", 5) == 0) | |
185 | SET_CONSOLE_3215; | |
186 | #endif | |
187 | #if defined(CONFIG_TN3270_CONSOLE) | |
188 | if (strncmp(str, "3270", 5) == 0) | |
189 | SET_CONSOLE_3270; | |
190 | #endif | |
191 | return 1; | |
192 | } | |
193 | ||
194 | __setup("conmode=", conmode_setup); | |
195 | ||
196 | static void __init conmode_default(void) | |
197 | { | |
198 | char query_buffer[1024]; | |
199 | char *ptr; | |
200 | ||
201 | if (MACHINE_IS_VM) { | |
6b979de3 | 202 | __cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
203 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
204 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
205 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
6b979de3 | 206 | __cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
207 | ptr = strstr(query_buffer, "CONMODE"); |
208 | /* | |
209 | * Set the conmode to 3215 so that the device recognition | |
210 | * will set the cu_type of the console to 3215. If the | |
211 | * conmode is 3270 and we don't set it back then both | |
212 | * 3215 and the 3270 driver will try to access the console | |
213 | * device (3215 as console and 3270 as normal tty). | |
214 | */ | |
6b979de3 | 215 | __cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 LT |
216 | if (ptr == NULL) { |
217 | #if defined(CONFIG_SCLP_CONSOLE) | |
218 | SET_CONSOLE_SCLP; | |
219 | #endif | |
220 | return; | |
221 | } | |
222 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
223 | #if defined(CONFIG_TN3270_CONSOLE) | |
224 | SET_CONSOLE_3270; | |
225 | #elif defined(CONFIG_TN3215_CONSOLE) | |
226 | SET_CONSOLE_3215; | |
227 | #elif defined(CONFIG_SCLP_CONSOLE) | |
228 | SET_CONSOLE_SCLP; | |
229 | #endif | |
230 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
231 | #if defined(CONFIG_TN3215_CONSOLE) | |
232 | SET_CONSOLE_3215; | |
233 | #elif defined(CONFIG_TN3270_CONSOLE) | |
234 | SET_CONSOLE_3270; | |
235 | #elif defined(CONFIG_SCLP_CONSOLE) | |
236 | SET_CONSOLE_SCLP; | |
237 | #endif | |
238 | } | |
239 | } else if (MACHINE_IS_P390) { | |
240 | #if defined(CONFIG_TN3215_CONSOLE) | |
241 | SET_CONSOLE_3215; | |
242 | #elif defined(CONFIG_TN3270_CONSOLE) | |
243 | SET_CONSOLE_3270; | |
244 | #endif | |
245 | } else { | |
246 | #if defined(CONFIG_SCLP_CONSOLE) | |
247 | SET_CONSOLE_SCLP; | |
248 | #endif | |
249 | } | |
250 | } | |
251 | ||
252 | #ifdef CONFIG_SMP | |
253 | extern void machine_restart_smp(char *); | |
254 | extern void machine_halt_smp(void); | |
255 | extern void machine_power_off_smp(void); | |
256 | ||
257 | void (*_machine_restart)(char *command) = machine_restart_smp; | |
258 | void (*_machine_halt)(void) = machine_halt_smp; | |
259 | void (*_machine_power_off)(void) = machine_power_off_smp; | |
260 | #else | |
261 | /* | |
262 | * Reboot, halt and power_off routines for non SMP. | |
263 | */ | |
264 | extern void reipl(unsigned long devno); | |
c782268b | 265 | extern void reipl_diag(void); |
1da177e4 LT |
266 | static void do_machine_restart_nonsmp(char * __unused) |
267 | { | |
c782268b VS |
268 | reipl_diag(); |
269 | ||
1da177e4 | 270 | if (MACHINE_IS_VM) |
68c11917 | 271 | cpcmd ("IPL", NULL, 0, NULL); |
1da177e4 LT |
272 | else |
273 | reipl (0x10000 | S390_lowcore.ipl_device); | |
274 | } | |
275 | ||
276 | static void do_machine_halt_nonsmp(void) | |
277 | { | |
278 | if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) | |
68c11917 | 279 | cpcmd(vmhalt_cmd, NULL, 0, NULL); |
1da177e4 LT |
280 | signal_processor(smp_processor_id(), sigp_stop_and_store_status); |
281 | } | |
282 | ||
283 | static void do_machine_power_off_nonsmp(void) | |
284 | { | |
285 | if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) | |
68c11917 | 286 | cpcmd(vmpoff_cmd, NULL, 0, NULL); |
1da177e4 LT |
287 | signal_processor(smp_processor_id(), sigp_stop_and_store_status); |
288 | } | |
289 | ||
290 | void (*_machine_restart)(char *command) = do_machine_restart_nonsmp; | |
291 | void (*_machine_halt)(void) = do_machine_halt_nonsmp; | |
292 | void (*_machine_power_off)(void) = do_machine_power_off_nonsmp; | |
293 | #endif | |
294 | ||
295 | /* | |
296 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
297 | * _machine_halt or _machine_power_off. | |
298 | */ | |
299 | ||
300 | void machine_restart(char *command) | |
301 | { | |
302 | console_unblank(); | |
303 | _machine_restart(command); | |
304 | } | |
305 | ||
1da177e4 LT |
306 | void machine_halt(void) |
307 | { | |
308 | console_unblank(); | |
309 | _machine_halt(); | |
310 | } | |
311 | ||
1da177e4 LT |
312 | void machine_power_off(void) |
313 | { | |
314 | console_unblank(); | |
315 | _machine_power_off(); | |
316 | } | |
317 | ||
53df751c MS |
318 | /* |
319 | * Dummy power off function. | |
320 | */ | |
321 | void (*pm_power_off)(void) = machine_power_off; | |
322 | ||
c9e37353 HC |
323 | static void __init |
324 | add_memory_hole(unsigned long start, unsigned long end) | |
1da177e4 | 325 | { |
c9e37353 HC |
326 | unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT; |
327 | ||
328 | if (end <= dma_pfn) | |
329 | zholes_size[ZONE_DMA] += end - start + 1; | |
330 | else if (start > dma_pfn) | |
331 | zholes_size[ZONE_NORMAL] += end - start + 1; | |
332 | else { | |
333 | zholes_size[ZONE_DMA] += dma_pfn - start + 1; | |
334 | zholes_size[ZONE_NORMAL] += end - dma_pfn; | |
335 | } | |
336 | } | |
1da177e4 | 337 | |
c9e37353 HC |
338 | static void __init |
339 | parse_cmdline_early(char **cmdline_p) | |
340 | { | |
341 | char c = ' ', cn, *to = command_line, *from = COMMAND_LINE; | |
342 | unsigned long delay = 0; | |
1da177e4 | 343 | |
c9e37353 HC |
344 | /* Save unparsed command line copy for /proc/cmdline */ |
345 | memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); | |
346 | saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; | |
1da177e4 | 347 | |
c9e37353 HC |
348 | for (;;) { |
349 | /* | |
350 | * "mem=XXX[kKmM]" sets memsize | |
351 | */ | |
352 | if (c == ' ' && strncmp(from, "mem=", 4) == 0) { | |
353 | memory_end = simple_strtoul(from+4, &from, 0); | |
354 | if ( *from == 'K' || *from == 'k' ) { | |
355 | memory_end = memory_end << 10; | |
356 | from++; | |
357 | } else if ( *from == 'M' || *from == 'm' ) { | |
358 | memory_end = memory_end << 20; | |
359 | from++; | |
360 | } | |
361 | } | |
362 | /* | |
363 | * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes | |
364 | */ | |
365 | if (c == ' ' && strncmp(from, "ipldelay=", 9) == 0) { | |
366 | delay = simple_strtoul(from+9, &from, 0); | |
1da177e4 LT |
367 | if (*from == 's' || *from == 'S') { |
368 | delay = delay*1000000; | |
369 | from++; | |
370 | } else if (*from == 'm' || *from == 'M') { | |
371 | delay = delay*60*1000000; | |
372 | from++; | |
373 | } | |
374 | /* now wait for the requested amount of time */ | |
375 | udelay(delay); | |
c9e37353 HC |
376 | } |
377 | cn = *(from++); | |
378 | if (!cn) | |
379 | break; | |
380 | if (cn == '\n') | |
381 | cn = ' '; /* replace newlines with space */ | |
1da177e4 LT |
382 | if (cn == 0x0d) |
383 | cn = ' '; /* replace 0x0d with space */ | |
c9e37353 HC |
384 | if (cn == ' ' && c == ' ') |
385 | continue; /* remove additional spaces */ | |
386 | c = cn; | |
387 | if (to - command_line >= COMMAND_LINE_SIZE) | |
388 | break; | |
389 | *(to++) = c; | |
390 | } | |
391 | if (c == ' ' && to > command_line) to--; | |
392 | *to = '\0'; | |
393 | *cmdline_p = command_line; | |
394 | } | |
395 | ||
396 | static void __init | |
397 | setup_lowcore(void) | |
398 | { | |
399 | struct _lowcore *lc; | |
400 | int lc_pages; | |
401 | ||
402 | /* | |
403 | * Setup lowcore for boot cpu | |
404 | */ | |
405 | lc_pages = sizeof(void *) == 8 ? 2 : 1; | |
406 | lc = (struct _lowcore *) | |
407 | __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); | |
408 | memset(lc, 0, lc_pages * PAGE_SIZE); | |
0b642ede | 409 | lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; |
c9e37353 HC |
410 | lc->restart_psw.addr = |
411 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; | |
412 | lc->external_new_psw.mask = PSW_KERNEL_BITS; | |
413 | lc->external_new_psw.addr = | |
414 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
415 | lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT; | |
416 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; | |
417 | lc->program_new_psw.mask = PSW_KERNEL_BITS; | |
418 | lc->program_new_psw.addr = | |
419 | PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; | |
77fa2245 HC |
420 | lc->mcck_new_psw.mask = |
421 | PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; | |
c9e37353 HC |
422 | lc->mcck_new_psw.addr = |
423 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
424 | lc->io_new_psw.mask = PSW_KERNEL_BITS; | |
425 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; | |
426 | lc->ipl_device = S390_lowcore.ipl_device; | |
427 | lc->jiffy_timer = -1LL; | |
428 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; | |
429 | lc->async_stack = (unsigned long) | |
430 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; | |
c9e37353 HC |
431 | lc->panic_stack = (unsigned long) |
432 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; | |
c9e37353 HC |
433 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
434 | lc->thread_info = (unsigned long) &init_thread_union; | |
347a8dc3 | 435 | #ifndef CONFIG_64BIT |
77fa2245 HC |
436 | if (MACHINE_HAS_IEEE) { |
437 | lc->extended_save_area_addr = (__u32) | |
438 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0); | |
439 | /* enable extended save area */ | |
440 | ctl_set_bit(14, 29); | |
441 | } | |
442 | #endif | |
c9e37353 HC |
443 | set_prefix((u32)(unsigned long) lc); |
444 | } | |
445 | ||
446 | static void __init | |
447 | setup_resources(void) | |
448 | { | |
449 | struct resource *res; | |
450 | int i; | |
451 | ||
452 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { | |
453 | res = alloc_bootmem_low(sizeof(struct resource)); | |
454 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; | |
455 | switch (memory_chunk[i].type) { | |
456 | case CHUNK_READ_WRITE: | |
457 | res->name = "System RAM"; | |
458 | break; | |
459 | case CHUNK_READ_ONLY: | |
460 | res->name = "System ROM"; | |
461 | res->flags |= IORESOURCE_READONLY; | |
462 | break; | |
463 | default: | |
464 | res->name = "reserved"; | |
465 | } | |
466 | res->start = memory_chunk[i].addr; | |
467 | res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; | |
468 | request_resource(&iomem_resource, res); | |
469 | request_resource(res, &code_resource); | |
470 | request_resource(res, &data_resource); | |
471 | } | |
472 | } | |
473 | ||
474 | static void __init | |
475 | setup_memory(void) | |
476 | { | |
477 | unsigned long bootmap_size; | |
0b642ede | 478 | unsigned long start_pfn, end_pfn, init_pfn; |
c9e37353 HC |
479 | unsigned long last_rw_end; |
480 | int i; | |
1da177e4 LT |
481 | |
482 | /* | |
483 | * partially used pages are not usable - thus | |
484 | * we are rounding upwards: | |
485 | */ | |
486 | start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
487 | end_pfn = max_pfn = memory_end >> PAGE_SHIFT; | |
488 | ||
0b642ede PO |
489 | /* Initialize storage key for kernel pages */ |
490 | for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++) | |
491 | page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY); | |
492 | ||
1da177e4 LT |
493 | /* |
494 | * Initialize the boot-time allocator (with low memory only): | |
495 | */ | |
496 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
497 | ||
498 | /* | |
499 | * Register RAM areas with the bootmem allocator. | |
500 | */ | |
c9e37353 HC |
501 | last_rw_end = start_pfn; |
502 | ||
0b642ede | 503 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
1da177e4 LT |
504 | unsigned long start_chunk, end_chunk; |
505 | ||
506 | if (memory_chunk[i].type != CHUNK_READ_WRITE) | |
507 | continue; | |
508 | start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1); | |
509 | start_chunk >>= PAGE_SHIFT; | |
510 | end_chunk = (memory_chunk[i].addr + memory_chunk[i].size); | |
511 | end_chunk >>= PAGE_SHIFT; | |
512 | if (start_chunk < start_pfn) | |
513 | start_chunk = start_pfn; | |
514 | if (end_chunk > end_pfn) | |
515 | end_chunk = end_pfn; | |
c9e37353 | 516 | if (start_chunk < end_chunk) { |
0b642ede PO |
517 | /* Initialize storage key for RAM pages */ |
518 | for (init_pfn = start_chunk ; init_pfn < end_chunk; | |
519 | init_pfn++) | |
520 | page_set_storage_key(init_pfn << PAGE_SHIFT, | |
521 | PAGE_DEFAULT_KEY); | |
1da177e4 LT |
522 | free_bootmem(start_chunk << PAGE_SHIFT, |
523 | (end_chunk - start_chunk) << PAGE_SHIFT); | |
c9e37353 HC |
524 | if (last_rw_end < start_chunk) |
525 | add_memory_hole(last_rw_end, start_chunk - 1); | |
526 | last_rw_end = end_chunk; | |
527 | } | |
1da177e4 LT |
528 | } |
529 | ||
0b642ede PO |
530 | psw_set_key(PAGE_DEFAULT_KEY); |
531 | ||
c9e37353 HC |
532 | if (last_rw_end < end_pfn - 1) |
533 | add_memory_hole(last_rw_end, end_pfn - 1); | |
534 | ||
535 | /* | |
536 | * Reserve the bootmem bitmap itself as well. We do this in two | |
537 | * steps (first step was init_bootmem()) because this catches | |
538 | * the (very unlikely) case of us accidentally initializing the | |
539 | * bootmem allocator with an invalid RAM area. | |
540 | */ | |
541 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size); | |
1da177e4 LT |
542 | |
543 | #ifdef CONFIG_BLK_DEV_INITRD | |
c9e37353 | 544 | if (INITRD_START) { |
1da177e4 LT |
545 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
546 | reserve_bootmem(INITRD_START, INITRD_SIZE); | |
547 | initrd_start = INITRD_START; | |
548 | initrd_end = initrd_start + INITRD_SIZE; | |
549 | } else { | |
c9e37353 HC |
550 | printk("initrd extends beyond end of memory " |
551 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
552 | initrd_start + INITRD_SIZE, memory_end); | |
553 | initrd_start = initrd_end = 0; | |
1da177e4 | 554 | } |
c9e37353 | 555 | } |
1da177e4 | 556 | #endif |
c9e37353 | 557 | } |
1da177e4 | 558 | |
c9e37353 HC |
559 | /* |
560 | * Setup function called from init/main.c just after the banner | |
561 | * was printed. | |
562 | */ | |
1da177e4 | 563 | |
c9e37353 HC |
564 | void __init |
565 | setup_arch(char **cmdline_p) | |
566 | { | |
1da177e4 | 567 | /* |
c9e37353 | 568 | * print what head.S has found out about the machine |
1da177e4 | 569 | */ |
347a8dc3 | 570 | #ifndef CONFIG_64BIT |
c9e37353 HC |
571 | printk((MACHINE_IS_VM) ? |
572 | "We are running under VM (31 bit mode)\n" : | |
573 | "We are running native (31 bit mode)\n"); | |
574 | printk((MACHINE_HAS_IEEE) ? | |
575 | "This machine has an IEEE fpu\n" : | |
576 | "This machine has no IEEE fpu\n"); | |
347a8dc3 | 577 | #else /* CONFIG_64BIT */ |
c9e37353 HC |
578 | printk((MACHINE_IS_VM) ? |
579 | "We are running under VM (64 bit mode)\n" : | |
580 | "We are running native (64 bit mode)\n"); | |
347a8dc3 | 581 | #endif /* CONFIG_64BIT */ |
c9e37353 HC |
582 | |
583 | ROOT_DEV = Root_RAM0; | |
347a8dc3 | 584 | #ifndef CONFIG_64BIT |
c9e37353 HC |
585 | memory_end = memory_size & ~0x400000UL; /* align memory end to 4MB */ |
586 | /* | |
587 | * We need some free virtual space to be able to do vmalloc. | |
588 | * On a machine with 2GB memory we make sure that we have at | |
589 | * least 128 MB free space for vmalloc. | |
590 | */ | |
591 | if (memory_end > 1920*1024*1024) | |
592 | memory_end = 1920*1024*1024; | |
347a8dc3 | 593 | #else /* CONFIG_64BIT */ |
c9e37353 | 594 | memory_end = memory_size & ~0x200000UL; /* detected in head.s */ |
347a8dc3 | 595 | #endif /* CONFIG_64BIT */ |
c9e37353 HC |
596 | |
597 | init_mm.start_code = PAGE_OFFSET; | |
598 | init_mm.end_code = (unsigned long) &_etext; | |
599 | init_mm.end_data = (unsigned long) &_edata; | |
600 | init_mm.brk = (unsigned long) &_end; | |
601 | ||
602 | parse_cmdline_early(cmdline_p); | |
255acee7 | 603 | parse_early_param(); |
c9e37353 HC |
604 | |
605 | setup_memory(); | |
606 | setup_resources(); | |
607 | setup_lowcore(); | |
608 | ||
1da177e4 LT |
609 | cpu_init(); |
610 | __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr; | |
255acee7 | 611 | smp_setup_cpu_possible_map(); |
1da177e4 LT |
612 | |
613 | /* | |
614 | * Create kernel page tables and switch to virtual addressing. | |
615 | */ | |
616 | paging_init(); | |
617 | ||
618 | /* Setup default console */ | |
619 | conmode_default(); | |
620 | } | |
621 | ||
622 | void print_cpu_info(struct cpuinfo_S390 *cpuinfo) | |
623 | { | |
624 | printk("cpu %d " | |
625 | #ifdef CONFIG_SMP | |
626 | "phys_idx=%d " | |
627 | #endif | |
628 | "vers=%02X ident=%06X machine=%04X unused=%04X\n", | |
629 | cpuinfo->cpu_nr, | |
630 | #ifdef CONFIG_SMP | |
631 | cpuinfo->cpu_addr, | |
632 | #endif | |
633 | cpuinfo->cpu_id.version, | |
634 | cpuinfo->cpu_id.ident, | |
635 | cpuinfo->cpu_id.machine, | |
636 | cpuinfo->cpu_id.unused); | |
637 | } | |
638 | ||
639 | /* | |
640 | * show_cpuinfo - Get information on one CPU for use by procfs. | |
641 | */ | |
642 | ||
643 | static int show_cpuinfo(struct seq_file *m, void *v) | |
644 | { | |
645 | struct cpuinfo_S390 *cpuinfo; | |
646 | unsigned long n = (unsigned long) v - 1; | |
647 | ||
b7ae9dd8 | 648 | preempt_disable(); |
1da177e4 LT |
649 | if (!n) { |
650 | seq_printf(m, "vendor_id : IBM/S390\n" | |
651 | "# processors : %i\n" | |
652 | "bogomips per cpu: %lu.%02lu\n", | |
653 | num_online_cpus(), loops_per_jiffy/(500000/HZ), | |
654 | (loops_per_jiffy/(5000/HZ))%100); | |
655 | } | |
656 | if (cpu_online(n)) { | |
657 | #ifdef CONFIG_SMP | |
658 | if (smp_processor_id() == n) | |
659 | cpuinfo = &S390_lowcore.cpu_data; | |
660 | else | |
661 | cpuinfo = &lowcore_ptr[n]->cpu_data; | |
662 | #else | |
663 | cpuinfo = &S390_lowcore.cpu_data; | |
664 | #endif | |
665 | seq_printf(m, "processor %li: " | |
666 | "version = %02X, " | |
667 | "identification = %06X, " | |
668 | "machine = %04X\n", | |
669 | n, cpuinfo->cpu_id.version, | |
670 | cpuinfo->cpu_id.ident, | |
671 | cpuinfo->cpu_id.machine); | |
672 | } | |
b7ae9dd8 | 673 | preempt_enable(); |
1da177e4 LT |
674 | return 0; |
675 | } | |
676 | ||
677 | static void *c_start(struct seq_file *m, loff_t *pos) | |
678 | { | |
679 | return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL; | |
680 | } | |
681 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
682 | { | |
683 | ++*pos; | |
684 | return c_start(m, pos); | |
685 | } | |
686 | static void c_stop(struct seq_file *m, void *v) | |
687 | { | |
688 | } | |
689 | struct seq_operations cpuinfo_op = { | |
690 | .start = c_start, | |
691 | .next = c_next, | |
692 | .stop = c_stop, | |
693 | .show = show_cpuinfo, | |
694 | }; | |
695 | ||
1e8e3383 HC |
696 | #define DEFINE_IPL_ATTR(_name, _format, _value) \ |
697 | static ssize_t ipl_##_name##_show(struct subsystem *subsys, \ | |
698 | char *page) \ | |
699 | { \ | |
700 | return sprintf(page, _format, _value); \ | |
701 | } \ | |
702 | static struct subsys_attribute ipl_##_name##_attr = \ | |
703 | __ATTR(_name, S_IRUGO, ipl_##_name##_show, NULL); | |
704 | ||
705 | DEFINE_IPL_ATTR(wwpn, "0x%016llx\n", (unsigned long long) | |
706 | IPL_PARMBLOCK_START->fcp.wwpn); | |
707 | DEFINE_IPL_ATTR(lun, "0x%016llx\n", (unsigned long long) | |
708 | IPL_PARMBLOCK_START->fcp.lun); | |
709 | DEFINE_IPL_ATTR(bootprog, "%lld\n", (unsigned long long) | |
710 | IPL_PARMBLOCK_START->fcp.bootprog); | |
711 | DEFINE_IPL_ATTR(br_lba, "%lld\n", (unsigned long long) | |
712 | IPL_PARMBLOCK_START->fcp.br_lba); | |
713 | ||
714 | enum ipl_type_type { | |
715 | ipl_type_unknown, | |
716 | ipl_type_ccw, | |
717 | ipl_type_fcp, | |
718 | }; | |
719 | ||
720 | static enum ipl_type_type | |
721 | get_ipl_type(void) | |
722 | { | |
723 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
724 | ||
725 | if (!IPL_DEVNO_VALID) | |
726 | return ipl_type_unknown; | |
727 | if (!IPL_PARMBLOCK_VALID) | |
728 | return ipl_type_ccw; | |
729 | if (ipl->hdr.header.version > IPL_MAX_SUPPORTED_VERSION) | |
730 | return ipl_type_unknown; | |
731 | if (ipl->fcp.pbt != IPL_TYPE_FCP) | |
732 | return ipl_type_unknown; | |
733 | return ipl_type_fcp; | |
734 | } | |
735 | ||
736 | static ssize_t | |
737 | ipl_type_show(struct subsystem *subsys, char *page) | |
738 | { | |
739 | switch (get_ipl_type()) { | |
740 | case ipl_type_ccw: | |
741 | return sprintf(page, "ccw\n"); | |
742 | case ipl_type_fcp: | |
743 | return sprintf(page, "fcp\n"); | |
744 | default: | |
745 | return sprintf(page, "unknown\n"); | |
746 | } | |
747 | } | |
748 | ||
749 | static struct subsys_attribute ipl_type_attr = __ATTR_RO(ipl_type); | |
750 | ||
751 | static ssize_t | |
752 | ipl_device_show(struct subsystem *subsys, char *page) | |
753 | { | |
754 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
755 | ||
756 | switch (get_ipl_type()) { | |
757 | case ipl_type_ccw: | |
758 | return sprintf(page, "0.0.%04x\n", ipl_devno); | |
759 | case ipl_type_fcp: | |
760 | return sprintf(page, "0.0.%04x\n", ipl->fcp.devno); | |
761 | default: | |
762 | return 0; | |
763 | } | |
764 | } | |
765 | ||
766 | static struct subsys_attribute ipl_device_attr = | |
767 | __ATTR(device, S_IRUGO, ipl_device_show, NULL); | |
768 | ||
769 | static struct attribute *ipl_fcp_attrs[] = { | |
770 | &ipl_type_attr.attr, | |
771 | &ipl_device_attr.attr, | |
772 | &ipl_wwpn_attr.attr, | |
773 | &ipl_lun_attr.attr, | |
774 | &ipl_bootprog_attr.attr, | |
775 | &ipl_br_lba_attr.attr, | |
776 | NULL, | |
777 | }; | |
778 | ||
779 | static struct attribute_group ipl_fcp_attr_group = { | |
780 | .attrs = ipl_fcp_attrs, | |
781 | }; | |
782 | ||
783 | static struct attribute *ipl_ccw_attrs[] = { | |
784 | &ipl_type_attr.attr, | |
785 | &ipl_device_attr.attr, | |
786 | NULL, | |
787 | }; | |
788 | ||
789 | static struct attribute_group ipl_ccw_attr_group = { | |
790 | .attrs = ipl_ccw_attrs, | |
791 | }; | |
792 | ||
793 | static struct attribute *ipl_unknown_attrs[] = { | |
794 | &ipl_type_attr.attr, | |
795 | NULL, | |
796 | }; | |
797 | ||
798 | static struct attribute_group ipl_unknown_attr_group = { | |
799 | .attrs = ipl_unknown_attrs, | |
800 | }; | |
801 | ||
802 | static ssize_t | |
803 | ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off, size_t count) | |
804 | { | |
805 | unsigned int size = IPL_PARMBLOCK_SIZE; | |
806 | ||
807 | if (off > size) | |
808 | return 0; | |
809 | if (off + count > size) | |
810 | count = size - off; | |
811 | ||
812 | memcpy(buf, (void *) IPL_PARMBLOCK_START + off, count); | |
813 | return count; | |
814 | } | |
815 | ||
816 | static struct bin_attribute ipl_parameter_attr = { | |
817 | .attr = { | |
818 | .name = "binary_parameter", | |
819 | .mode = S_IRUGO, | |
820 | .owner = THIS_MODULE, | |
821 | }, | |
822 | .size = PAGE_SIZE, | |
823 | .read = &ipl_parameter_read, | |
824 | }; | |
825 | ||
826 | static ssize_t | |
827 | ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off, size_t count) | |
828 | { | |
829 | unsigned int size = IPL_PARMBLOCK_START->fcp.scp_data_len; | |
830 | void *scp_data = &IPL_PARMBLOCK_START->fcp.scp_data; | |
831 | ||
832 | if (off > size) | |
833 | return 0; | |
834 | if (off + count > size) | |
835 | count = size - off; | |
836 | ||
837 | memcpy(buf, scp_data + off, count); | |
838 | return count; | |
839 | } | |
840 | ||
841 | static struct bin_attribute ipl_scp_data_attr = { | |
842 | .attr = { | |
843 | .name = "scp_data", | |
844 | .mode = S_IRUGO, | |
845 | .owner = THIS_MODULE, | |
846 | }, | |
847 | .size = PAGE_SIZE, | |
848 | .read = &ipl_scp_data_read, | |
849 | }; | |
850 | ||
851 | static decl_subsys(ipl, NULL, NULL); | |
852 | ||
853 | static int __init | |
854 | ipl_device_sysfs_register(void) { | |
855 | int rc; | |
856 | ||
857 | rc = firmware_register(&ipl_subsys); | |
858 | if (rc) | |
859 | return rc; | |
860 | ||
861 | switch (get_ipl_type()) { | |
862 | case ipl_type_ccw: | |
863 | sysfs_create_group(&ipl_subsys.kset.kobj, &ipl_ccw_attr_group); | |
864 | break; | |
865 | case ipl_type_fcp: | |
866 | sysfs_create_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group); | |
867 | sysfs_create_bin_file(&ipl_subsys.kset.kobj, | |
868 | &ipl_parameter_attr); | |
869 | sysfs_create_bin_file(&ipl_subsys.kset.kobj, | |
870 | &ipl_scp_data_attr); | |
871 | break; | |
872 | default: | |
873 | sysfs_create_group(&ipl_subsys.kset.kobj, | |
874 | &ipl_unknown_attr_group); | |
875 | break; | |
876 | } | |
877 | return 0; | |
878 | } | |
879 | ||
880 | __initcall(ipl_device_sysfs_register); |