Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * arch/s390/kernel/setup.c | |
3 | * | |
4 | * S390 version | |
8b646bd7 | 5 | * Copyright (C) IBM Corp. 1999,2012 |
1da177e4 LT |
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 | ||
3b6ed4ab MS |
17 | #define KMSG_COMPONENT "setup" |
18 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
19 | ||
1da177e4 LT |
20 | #include <linux/errno.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/kernel.h> | |
ff38df37 | 24 | #include <linux/memblock.h> |
1da177e4 LT |
25 | #include <linux/mm.h> |
26 | #include <linux/stddef.h> | |
27 | #include <linux/unistd.h> | |
28 | #include <linux/ptrace.h> | |
1da177e4 | 29 | #include <linux/user.h> |
1da177e4 LT |
30 | #include <linux/tty.h> |
31 | #include <linux/ioport.h> | |
32 | #include <linux/delay.h> | |
1da177e4 LT |
33 | #include <linux/init.h> |
34 | #include <linux/initrd.h> | |
35 | #include <linux/bootmem.h> | |
36 | #include <linux/root_dev.h> | |
37 | #include <linux/console.h> | |
1da177e4 | 38 | #include <linux/kernel_stat.h> |
1e8e3383 | 39 | #include <linux/device.h> |
585c3047 | 40 | #include <linux/notifier.h> |
65912a84 | 41 | #include <linux/pfn.h> |
fe355b7f | 42 | #include <linux/ctype.h> |
2b67fc46 | 43 | #include <linux/reboot.h> |
dbd70fb4 | 44 | #include <linux/topology.h> |
dfd9f7ab | 45 | #include <linux/ftrace.h> |
60a0c68d MH |
46 | #include <linux/kexec.h> |
47 | #include <linux/crash_dump.h> | |
48 | #include <linux/memory.h> | |
048cd4e5 | 49 | #include <linux/compat.h> |
1da177e4 | 50 | |
46b05d26 | 51 | #include <asm/ipl.h> |
1da177e4 | 52 | #include <asm/uaccess.h> |
1e3cab2f | 53 | #include <asm/facility.h> |
1da177e4 LT |
54 | #include <asm/smp.h> |
55 | #include <asm/mmu_context.h> | |
56 | #include <asm/cpcmd.h> | |
57 | #include <asm/lowcore.h> | |
58 | #include <asm/irq.h> | |
0b642ede PO |
59 | #include <asm/page.h> |
60 | #include <asm/ptrace.h> | |
cc13ad62 | 61 | #include <asm/sections.h> |
fe355b7f | 62 | #include <asm/ebcdic.h> |
faeba830 | 63 | #include <asm/kvm_virtio.h> |
60a0c68d | 64 | #include <asm/diag.h> |
4857d4bb | 65 | #include <asm/os_info.h> |
8b646bd7 | 66 | #include "entry.h" |
c1821c2e | 67 | |
b50511e4 MS |
68 | long psw_kernel_bits = PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_PRIMARY | |
69 | PSW_MASK_EA | PSW_MASK_BA; | |
70 | long psw_user_bits = PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | | |
71 | PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | | |
72 | PSW_MASK_PSTATE | PSW_ASC_HOME; | |
1da177e4 | 73 | |
d02765d1 GS |
74 | /* |
75 | * User copy operations. | |
76 | */ | |
77 | struct uaccess_ops uaccess; | |
d4ee453b | 78 | EXPORT_SYMBOL(uaccess); |
d02765d1 | 79 | |
1da177e4 LT |
80 | /* |
81 | * Machine setup.. | |
82 | */ | |
83 | unsigned int console_mode = 0; | |
1485c5c8 HC |
84 | EXPORT_SYMBOL(console_mode); |
85 | ||
1da177e4 | 86 | unsigned int console_devno = -1; |
1485c5c8 HC |
87 | EXPORT_SYMBOL(console_devno); |
88 | ||
1da177e4 | 89 | unsigned int console_irq = -1; |
1485c5c8 HC |
90 | EXPORT_SYMBOL(console_irq); |
91 | ||
cf8ba7a9 MS |
92 | unsigned long elf_hwcap = 0; |
93 | char elf_platform[ELF_PLATFORM_SIZE]; | |
36a2bd42 | 94 | |
23d17421 | 95 | struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
23d75d9c HC |
96 | |
97 | int __initdata memory_end_set; | |
98 | unsigned long __initdata memory_end; | |
1da177e4 | 99 | |
14045ebf MS |
100 | unsigned long VMALLOC_START; |
101 | EXPORT_SYMBOL(VMALLOC_START); | |
102 | ||
103 | unsigned long VMALLOC_END; | |
104 | EXPORT_SYMBOL(VMALLOC_END); | |
105 | ||
106 | struct page *vmemmap; | |
107 | EXPORT_SYMBOL(vmemmap); | |
108 | ||
099b7651 FM |
109 | /* An array with a pointer to the lowcore of every CPU. */ |
110 | struct _lowcore *lowcore_ptr[NR_CPUS]; | |
111 | EXPORT_SYMBOL(lowcore_ptr); | |
112 | ||
1da177e4 LT |
113 | /* |
114 | * This is set up by the setup-routine at boot-time | |
115 | * for S390 need to find out, what we have to setup | |
116 | * using address 0x10400 ... | |
117 | */ | |
118 | ||
119 | #include <asm/setup.h> | |
120 | ||
1da177e4 LT |
121 | /* |
122 | * condev= and conmode= setup parameter. | |
123 | */ | |
124 | ||
125 | static int __init condev_setup(char *str) | |
126 | { | |
127 | int vdev; | |
128 | ||
129 | vdev = simple_strtoul(str, &str, 0); | |
130 | if (vdev >= 0 && vdev < 65536) { | |
131 | console_devno = vdev; | |
132 | console_irq = -1; | |
133 | } | |
134 | return 1; | |
135 | } | |
136 | ||
137 | __setup("condev=", condev_setup); | |
138 | ||
637952ca HB |
139 | static void __init set_preferred_console(void) |
140 | { | |
c4de0c1a | 141 | if (MACHINE_IS_KVM) |
637952ca | 142 | add_preferred_console("hvc", 0, NULL); |
c4de0c1a | 143 | else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) |
637952ca | 144 | add_preferred_console("ttyS", 0, NULL); |
c4de0c1a | 145 | else if (CONSOLE_IS_3270) |
637952ca HB |
146 | add_preferred_console("tty3270", 0, NULL); |
147 | } | |
148 | ||
1da177e4 LT |
149 | static int __init conmode_setup(char *str) |
150 | { | |
8c0933ee | 151 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
152 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) |
153 | SET_CONSOLE_SCLP; | |
154 | #endif | |
155 | #if defined(CONFIG_TN3215_CONSOLE) | |
156 | if (strncmp(str, "3215", 5) == 0) | |
157 | SET_CONSOLE_3215; | |
158 | #endif | |
159 | #if defined(CONFIG_TN3270_CONSOLE) | |
160 | if (strncmp(str, "3270", 5) == 0) | |
161 | SET_CONSOLE_3270; | |
162 | #endif | |
637952ca | 163 | set_preferred_console(); |
1da177e4 LT |
164 | return 1; |
165 | } | |
166 | ||
167 | __setup("conmode=", conmode_setup); | |
168 | ||
169 | static void __init conmode_default(void) | |
170 | { | |
171 | char query_buffer[1024]; | |
172 | char *ptr; | |
173 | ||
174 | if (MACHINE_IS_VM) { | |
740b5706 | 175 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
176 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
177 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
178 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
740b5706 | 179 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
180 | ptr = strstr(query_buffer, "CONMODE"); |
181 | /* | |
182 | * Set the conmode to 3215 so that the device recognition | |
183 | * will set the cu_type of the console to 3215. If the | |
184 | * conmode is 3270 and we don't set it back then both | |
185 | * 3215 and the 3270 driver will try to access the console | |
186 | * device (3215 as console and 3270 as normal tty). | |
187 | */ | |
740b5706 | 188 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 | 189 | if (ptr == NULL) { |
8c0933ee | 190 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
191 | SET_CONSOLE_SCLP; |
192 | #endif | |
193 | return; | |
194 | } | |
195 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
196 | #if defined(CONFIG_TN3270_CONSOLE) | |
197 | SET_CONSOLE_3270; | |
198 | #elif defined(CONFIG_TN3215_CONSOLE) | |
199 | SET_CONSOLE_3215; | |
8c0933ee | 200 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
201 | SET_CONSOLE_SCLP; |
202 | #endif | |
203 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
204 | #if defined(CONFIG_TN3215_CONSOLE) | |
205 | SET_CONSOLE_3215; | |
206 | #elif defined(CONFIG_TN3270_CONSOLE) | |
207 | SET_CONSOLE_3270; | |
8c0933ee | 208 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
209 | SET_CONSOLE_SCLP; |
210 | #endif | |
211 | } | |
1da177e4 | 212 | } else { |
8c0933ee | 213 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
214 | SET_CONSOLE_SCLP; |
215 | #endif | |
216 | } | |
217 | } | |
218 | ||
59f2e69d | 219 | #ifdef CONFIG_ZFCPDUMP |
411ed322 MH |
220 | static void __init setup_zfcpdump(unsigned int console_devno) |
221 | { | |
a0443fbb | 222 | static char str[41]; |
411ed322 MH |
223 | |
224 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) | |
225 | return; | |
3f25dc4f MH |
226 | if (OLDMEM_BASE) |
227 | return; | |
411ed322 | 228 | if (console_devno != -1) |
a0443fbb | 229 | sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x", |
411ed322 MH |
230 | ipl_info.data.fcp.dev_id.devno, console_devno); |
231 | else | |
a0443fbb | 232 | sprintf(str, " cio_ignore=all,!0.0.%04x", |
411ed322 | 233 | ipl_info.data.fcp.dev_id.devno); |
a0443fbb | 234 | strcat(boot_command_line, str); |
411ed322 MH |
235 | console_loglevel = 2; |
236 | } | |
237 | #else | |
238 | static inline void setup_zfcpdump(unsigned int console_devno) {} | |
239 | #endif /* CONFIG_ZFCPDUMP */ | |
240 | ||
1da177e4 LT |
241 | /* |
242 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
243 | * _machine_halt or _machine_power_off. | |
244 | */ | |
245 | ||
246 | void machine_restart(char *command) | |
247 | { | |
7aa8dac7 | 248 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
06fa46a2 MS |
249 | /* |
250 | * Only unblank the console if we are called in enabled | |
251 | * context or a bust_spinlocks cleared the way for us. | |
252 | */ | |
253 | console_unblank(); | |
1da177e4 LT |
254 | _machine_restart(command); |
255 | } | |
256 | ||
1da177e4 LT |
257 | void machine_halt(void) |
258 | { | |
06fa46a2 MS |
259 | if (!in_interrupt() || oops_in_progress) |
260 | /* | |
261 | * Only unblank the console if we are called in enabled | |
262 | * context or a bust_spinlocks cleared the way for us. | |
263 | */ | |
264 | console_unblank(); | |
1da177e4 LT |
265 | _machine_halt(); |
266 | } | |
267 | ||
1da177e4 LT |
268 | void machine_power_off(void) |
269 | { | |
06fa46a2 MS |
270 | if (!in_interrupt() || oops_in_progress) |
271 | /* | |
272 | * Only unblank the console if we are called in enabled | |
273 | * context or a bust_spinlocks cleared the way for us. | |
274 | */ | |
275 | console_unblank(); | |
1da177e4 LT |
276 | _machine_power_off(); |
277 | } | |
278 | ||
53df751c MS |
279 | /* |
280 | * Dummy power off function. | |
281 | */ | |
282 | void (*pm_power_off)(void) = machine_power_off; | |
283 | ||
59685296 HC |
284 | static int __init early_parse_mem(char *p) |
285 | { | |
286 | memory_end = memparse(p, &p); | |
23d75d9c | 287 | memory_end_set = 1; |
59685296 HC |
288 | return 0; |
289 | } | |
290 | early_param("mem", early_parse_mem); | |
291 | ||
14045ebf MS |
292 | static int __init parse_vmalloc(char *arg) |
293 | { | |
294 | if (!arg) | |
295 | return -EINVAL; | |
296 | VMALLOC_END = (memparse(arg, &arg) + PAGE_SIZE - 1) & PAGE_MASK; | |
297 | return 0; | |
298 | } | |
299 | early_param("vmalloc", parse_vmalloc); | |
300 | ||
b11b5334 MS |
301 | unsigned int user_mode = HOME_SPACE_MODE; |
302 | EXPORT_SYMBOL_GPL(user_mode); | |
c1821c2e | 303 | |
b50511e4 | 304 | static int set_amode_primary(void) |
c1821c2e | 305 | { |
b50511e4 MS |
306 | psw_kernel_bits = (psw_kernel_bits & ~PSW_MASK_ASC) | PSW_ASC_HOME; |
307 | psw_user_bits = (psw_user_bits & ~PSW_MASK_ASC) | PSW_ASC_PRIMARY; | |
c1821c2e | 308 | #ifdef CONFIG_COMPAT |
b50511e4 MS |
309 | psw32_user_bits = |
310 | (psw32_user_bits & ~PSW32_MASK_ASC) | PSW32_ASC_PRIMARY; | |
c1821c2e | 311 | #endif |
c1821c2e GS |
312 | |
313 | if (MACHINE_HAS_MVCOS) { | |
c1821c2e | 314 | memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); |
3b6ed4ab | 315 | return 1; |
c1821c2e | 316 | } else { |
c1821c2e | 317 | memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); |
3b6ed4ab | 318 | return 0; |
c1821c2e GS |
319 | } |
320 | } | |
321 | ||
322 | /* | |
323 | * Switch kernel/user addressing modes? | |
324 | */ | |
325 | static int __init early_parse_switch_amode(char *p) | |
326 | { | |
043d0708 | 327 | user_mode = PRIMARY_SPACE_MODE; |
c1821c2e GS |
328 | return 0; |
329 | } | |
330 | early_param("switch_amode", early_parse_switch_amode); | |
331 | ||
b11b5334 | 332 | static int __init early_parse_user_mode(char *p) |
c1821c2e | 333 | { |
b11b5334 MS |
334 | if (p && strcmp(p, "primary") == 0) |
335 | user_mode = PRIMARY_SPACE_MODE; | |
b11b5334 MS |
336 | else if (!p || strcmp(p, "home") == 0) |
337 | user_mode = HOME_SPACE_MODE; | |
338 | else | |
339 | return 1; | |
3b6ed4ab | 340 | return 0; |
c1821c2e | 341 | } |
b11b5334 | 342 | early_param("user_mode", early_parse_user_mode); |
c1821c2e | 343 | |
c1821c2e GS |
344 | static void setup_addressing_mode(void) |
345 | { | |
043d0708 | 346 | if (user_mode == PRIMARY_SPACE_MODE) { |
b50511e4 | 347 | if (set_amode_primary()) |
3b6ed4ab MS |
348 | pr_info("Address spaces switched, " |
349 | "mvcos available\n"); | |
350 | else | |
351 | pr_info("Address spaces switched, " | |
352 | "mvcos not available\n"); | |
c1821c2e GS |
353 | } |
354 | } | |
355 | ||
8b646bd7 MS |
356 | void *restart_stack __attribute__((__section__(".data"))); |
357 | ||
358 | static void __init setup_lowcore(void) | |
c9e37353 HC |
359 | { |
360 | struct _lowcore *lc; | |
c9e37353 HC |
361 | |
362 | /* | |
363 | * Setup lowcore for boot cpu | |
364 | */ | |
cbb870c8 | 365 | BUILD_BUG_ON(sizeof(struct _lowcore) != LC_PAGES * 4096); |
a0878656 | 366 | lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0); |
b50511e4 | 367 | lc->restart_psw.mask = psw_kernel_bits; |
c9e37353 | 368 | lc->restart_psw.addr = |
8b646bd7 | 369 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; |
b50511e4 MS |
370 | lc->external_new_psw.mask = psw_kernel_bits | |
371 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 HC |
372 | lc->external_new_psw.addr = |
373 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
b50511e4 MS |
374 | lc->svc_new_psw.mask = psw_kernel_bits | |
375 | PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK; | |
c9e37353 | 376 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
b50511e4 MS |
377 | lc->program_new_psw.mask = psw_kernel_bits | |
378 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 | 379 | lc->program_new_psw.addr = |
b50511e4 MS |
380 | PSW_ADDR_AMODE | (unsigned long) pgm_check_handler; |
381 | lc->mcck_new_psw.mask = psw_kernel_bits; | |
c9e37353 HC |
382 | lc->mcck_new_psw.addr = |
383 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
b50511e4 MS |
384 | lc->io_new_psw.mask = psw_kernel_bits | |
385 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 | 386 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
5a62b192 | 387 | lc->clock_comparator = -1ULL; |
c9e37353 HC |
388 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; |
389 | lc->async_stack = (unsigned long) | |
390 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; | |
c9e37353 HC |
391 | lc->panic_stack = (unsigned long) |
392 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; | |
c9e37353 HC |
393 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
394 | lc->thread_info = (unsigned long) &init_thread_union; | |
25097bf1 | 395 | lc->machine_flags = S390_lowcore.machine_flags; |
14375bc4 MS |
396 | lc->stfl_fac_list = S390_lowcore.stfl_fac_list; |
397 | memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, | |
398 | MAX_FACILITY_BIT/8); | |
347a8dc3 | 399 | #ifndef CONFIG_64BIT |
77fa2245 HC |
400 | if (MACHINE_HAS_IEEE) { |
401 | lc->extended_save_area_addr = (__u32) | |
a0878656 | 402 | __alloc_bootmem_low(PAGE_SIZE, PAGE_SIZE, 0); |
77fa2245 | 403 | /* enable extended save area */ |
c4972f33 | 404 | __ctl_set_bit(14, 29); |
77fa2245 | 405 | } |
c742b31c MS |
406 | #else |
407 | lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; | |
77fa2245 | 408 | #endif |
ab96e798 MS |
409 | lc->sync_enter_timer = S390_lowcore.sync_enter_timer; |
410 | lc->async_enter_timer = S390_lowcore.async_enter_timer; | |
411 | lc->exit_timer = S390_lowcore.exit_timer; | |
412 | lc->user_timer = S390_lowcore.user_timer; | |
413 | lc->system_timer = S390_lowcore.system_timer; | |
414 | lc->steal_timer = S390_lowcore.steal_timer; | |
415 | lc->last_update_timer = S390_lowcore.last_update_timer; | |
416 | lc->last_update_clock = S390_lowcore.last_update_clock; | |
dfd9f7ab | 417 | lc->ftrace_func = S390_lowcore.ftrace_func; |
8b646bd7 MS |
418 | |
419 | restart_stack = __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0); | |
420 | restart_stack += ASYNC_SIZE; | |
421 | ||
422 | /* | |
423 | * Set up PSW restart to call ipl.c:do_restart(). Copy the relevant | |
424 | * restart data to the absolute zero lowcore. This is necesary if | |
425 | * PSW restart is done on an offline CPU that has lowcore zero. | |
426 | */ | |
427 | lc->restart_stack = (unsigned long) restart_stack; | |
428 | lc->restart_fn = (unsigned long) do_restart; | |
429 | lc->restart_data = 0; | |
430 | lc->restart_source = -1UL; | |
73bf463e MH |
431 | |
432 | /* Setup absolute zero lowcore */ | |
fbe76568 HC |
433 | mem_assign_absolute(S390_lowcore.restart_stack, lc->restart_stack); |
434 | mem_assign_absolute(S390_lowcore.restart_fn, lc->restart_fn); | |
435 | mem_assign_absolute(S390_lowcore.restart_data, lc->restart_data); | |
436 | mem_assign_absolute(S390_lowcore.restart_source, lc->restart_source); | |
437 | mem_assign_absolute(S390_lowcore.restart_psw, lc->restart_psw); | |
8b646bd7 | 438 | |
c9e37353 | 439 | set_prefix((u32)(unsigned long) lc); |
099b7651 | 440 | lowcore_ptr[0] = lc; |
c9e37353 HC |
441 | } |
442 | ||
71189284 HC |
443 | static struct resource code_resource = { |
444 | .name = "Kernel code", | |
445 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
446 | }; | |
447 | ||
448 | static struct resource data_resource = { | |
449 | .name = "Kernel data", | |
450 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
451 | }; | |
452 | ||
4cc69531 HC |
453 | static struct resource bss_resource = { |
454 | .name = "Kernel bss", | |
455 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
456 | }; | |
457 | ||
71189284 HC |
458 | static struct resource __initdata *standard_resources[] = { |
459 | &code_resource, | |
460 | &data_resource, | |
4cc69531 | 461 | &bss_resource, |
71189284 HC |
462 | }; |
463 | ||
464 | static void __init setup_resources(void) | |
c9e37353 | 465 | { |
71189284 HC |
466 | struct resource *res, *std_res, *sub_res; |
467 | int i, j; | |
c9e37353 | 468 | |
cc13ad62 HC |
469 | code_resource.start = (unsigned long) &_text; |
470 | code_resource.end = (unsigned long) &_etext - 1; | |
471 | data_resource.start = (unsigned long) &_etext; | |
472 | data_resource.end = (unsigned long) &_edata - 1; | |
4cc69531 HC |
473 | bss_resource.start = (unsigned long) &__bss_start; |
474 | bss_resource.end = (unsigned long) &__bss_stop - 1; | |
cc13ad62 | 475 | |
9f4b0ba8 HC |
476 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
477 | if (!memory_chunk[i].size) | |
478 | continue; | |
60a0c68d MH |
479 | if (memory_chunk[i].type == CHUNK_OLDMEM || |
480 | memory_chunk[i].type == CHUNK_CRASHK) | |
481 | continue; | |
71189284 | 482 | res = alloc_bootmem_low(sizeof(*res)); |
c9e37353 HC |
483 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; |
484 | switch (memory_chunk[i].type) { | |
485 | case CHUNK_READ_WRITE: | |
dab7a7b1 | 486 | case CHUNK_CRASHK: |
c9e37353 HC |
487 | res->name = "System RAM"; |
488 | break; | |
489 | case CHUNK_READ_ONLY: | |
490 | res->name = "System ROM"; | |
491 | res->flags |= IORESOURCE_READONLY; | |
492 | break; | |
493 | default: | |
494 | res->name = "reserved"; | |
495 | } | |
496 | res->start = memory_chunk[i].addr; | |
71189284 | 497 | res->end = res->start + memory_chunk[i].size - 1; |
c9e37353 | 498 | request_resource(&iomem_resource, res); |
fe355b7f | 499 | |
71189284 HC |
500 | for (j = 0; j < ARRAY_SIZE(standard_resources); j++) { |
501 | std_res = standard_resources[j]; | |
502 | if (std_res->start < res->start || | |
503 | std_res->start > res->end) | |
504 | continue; | |
505 | if (std_res->end > res->end) { | |
506 | sub_res = alloc_bootmem_low(sizeof(*sub_res)); | |
507 | *sub_res = *std_res; | |
508 | sub_res->end = res->end; | |
509 | std_res->start = res->end + 1; | |
510 | request_resource(res, sub_res); | |
511 | } else { | |
512 | request_resource(res, std_res); | |
513 | } | |
fe355b7f | 514 | } |
c9e37353 HC |
515 | } |
516 | } | |
517 | ||
411ed322 MH |
518 | unsigned long real_memory_size; |
519 | EXPORT_SYMBOL_GPL(real_memory_size); | |
520 | ||
8b62bc96 HC |
521 | static void __init setup_memory_end(void) |
522 | { | |
14045ebf | 523 | unsigned long vmax, vmalloc_size, tmp; |
8b62bc96 HC |
524 | int i; |
525 | ||
60a0c68d | 526 | |
59f2e69d | 527 | #ifdef CONFIG_ZFCPDUMP |
3f25dc4f | 528 | if (ipl_info.type == IPL_TYPE_FCP_DUMP && !OLDMEM_BASE) { |
411ed322 | 529 | memory_end = ZFCPDUMP_HSA_SIZE; |
23d75d9c HC |
530 | memory_end_set = 1; |
531 | } | |
411ed322 | 532 | #endif |
14045ebf | 533 | real_memory_size = 0; |
8b62bc96 HC |
534 | memory_end &= PAGE_MASK; |
535 | ||
9f4b0ba8 HC |
536 | /* |
537 | * Make sure all chunks are MAX_ORDER aligned so we don't need the | |
538 | * extra checks that HOLES_IN_ZONE would require. | |
539 | */ | |
540 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
541 | unsigned long start, end; | |
542 | struct mem_chunk *chunk; | |
543 | unsigned long align; | |
544 | ||
545 | chunk = &memory_chunk[i]; | |
546 | align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); | |
547 | start = (chunk->addr + align - 1) & ~(align - 1); | |
548 | end = (chunk->addr + chunk->size) & ~(align - 1); | |
549 | if (start >= end) | |
550 | memset(chunk, 0, sizeof(*chunk)); | |
551 | else { | |
552 | chunk->addr = start; | |
553 | chunk->size = end - start; | |
554 | } | |
14045ebf MS |
555 | real_memory_size = max(real_memory_size, |
556 | chunk->addr + chunk->size); | |
9f4b0ba8 HC |
557 | } |
558 | ||
14045ebf MS |
559 | /* Choose kernel address space layout: 2, 3, or 4 levels. */ |
560 | #ifdef CONFIG_64BIT | |
561 | vmalloc_size = VMALLOC_END ?: 128UL << 30; | |
562 | tmp = (memory_end ?: real_memory_size) / PAGE_SIZE; | |
563 | tmp = tmp * (sizeof(struct page) + PAGE_SIZE) + vmalloc_size; | |
564 | if (tmp <= (1UL << 42)) | |
565 | vmax = 1UL << 42; /* 3-level kernel page table */ | |
566 | else | |
567 | vmax = 1UL << 53; /* 4-level kernel page table */ | |
568 | #else | |
569 | vmalloc_size = VMALLOC_END ?: 96UL << 20; | |
570 | vmax = 1UL << 31; /* 2-level kernel page table */ | |
571 | #endif | |
572 | /* vmalloc area is at the end of the kernel address space. */ | |
573 | VMALLOC_END = vmax; | |
574 | VMALLOC_START = vmax - vmalloc_size; | |
575 | ||
576 | /* Split remaining virtual space between 1:1 mapping & vmemmap array */ | |
577 | tmp = VMALLOC_START / (PAGE_SIZE + sizeof(struct page)); | |
578 | tmp = VMALLOC_START - tmp * sizeof(struct page); | |
579 | tmp &= ~((vmax >> 11) - 1); /* align to page table level */ | |
580 | tmp = min(tmp, 1UL << MAX_PHYSMEM_BITS); | |
581 | vmemmap = (struct page *) tmp; | |
582 | ||
583 | /* Take care that memory_end is set and <= vmemmap */ | |
584 | memory_end = min(memory_end ?: real_memory_size, tmp); | |
585 | ||
586 | /* Fixup memory chunk array to fit into 0..memory_end */ | |
8b62bc96 HC |
587 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
588 | struct mem_chunk *chunk = &memory_chunk[i]; | |
589 | ||
14045ebf | 590 | if (chunk->addr >= memory_end) { |
8b62bc96 HC |
591 | memset(chunk, 0, sizeof(*chunk)); |
592 | continue; | |
593 | } | |
14045ebf MS |
594 | if (chunk->addr + chunk->size > memory_end) |
595 | chunk->size = memory_end - chunk->addr; | |
8b62bc96 | 596 | } |
8b62bc96 HC |
597 | } |
598 | ||
d38593f9 MH |
599 | static void __init setup_vmcoreinfo(void) |
600 | { | |
601 | #ifdef CONFIG_KEXEC | |
fbe76568 | 602 | mem_assign_absolute(S390_lowcore.vmcore_info, paddr_vmcoreinfo_note()); |
d38593f9 MH |
603 | #endif |
604 | } | |
605 | ||
60a0c68d MH |
606 | #ifdef CONFIG_CRASH_DUMP |
607 | ||
608 | /* | |
609 | * Find suitable location for crashkernel memory | |
610 | */ | |
611 | static unsigned long __init find_crash_base(unsigned long crash_size, | |
612 | char **msg) | |
613 | { | |
614 | unsigned long crash_base; | |
615 | struct mem_chunk *chunk; | |
616 | int i; | |
617 | ||
618 | if (memory_chunk[0].size < crash_size) { | |
619 | *msg = "first memory chunk must be at least crashkernel size"; | |
620 | return 0; | |
621 | } | |
5f894cbb | 622 | if (OLDMEM_BASE && crash_size == OLDMEM_SIZE) |
60a0c68d MH |
623 | return OLDMEM_BASE; |
624 | ||
625 | for (i = MEMORY_CHUNKS - 1; i >= 0; i--) { | |
626 | chunk = &memory_chunk[i]; | |
627 | if (chunk->size == 0) | |
628 | continue; | |
629 | if (chunk->type != CHUNK_READ_WRITE) | |
630 | continue; | |
631 | if (chunk->size < crash_size) | |
632 | continue; | |
633 | crash_base = (chunk->addr + chunk->size) - crash_size; | |
634 | if (crash_base < crash_size) | |
635 | continue; | |
636 | if (crash_base < ZFCPDUMP_HSA_SIZE_MAX) | |
637 | continue; | |
638 | if (crash_base < (unsigned long) INITRD_START + INITRD_SIZE) | |
639 | continue; | |
640 | return crash_base; | |
641 | } | |
642 | *msg = "no suitable area found"; | |
643 | return 0; | |
644 | } | |
645 | ||
646 | /* | |
647 | * Check if crash_base and crash_size is valid | |
648 | */ | |
649 | static int __init verify_crash_base(unsigned long crash_base, | |
650 | unsigned long crash_size, | |
651 | char **msg) | |
652 | { | |
653 | struct mem_chunk *chunk; | |
654 | int i; | |
655 | ||
656 | /* | |
657 | * Because we do the swap to zero, we must have at least 'crash_size' | |
658 | * bytes free space before crash_base | |
659 | */ | |
660 | if (crash_size > crash_base) { | |
661 | *msg = "crashkernel offset must be greater than size"; | |
662 | return -EINVAL; | |
663 | } | |
664 | ||
665 | /* First memory chunk must be at least crash_size */ | |
666 | if (memory_chunk[0].size < crash_size) { | |
667 | *msg = "first memory chunk must be at least crashkernel size"; | |
668 | return -EINVAL; | |
669 | } | |
670 | /* Check if we fit into the respective memory chunk */ | |
671 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
672 | chunk = &memory_chunk[i]; | |
673 | if (chunk->size == 0) | |
674 | continue; | |
675 | if (crash_base < chunk->addr) | |
676 | continue; | |
677 | if (crash_base >= chunk->addr + chunk->size) | |
678 | continue; | |
679 | /* we have found the memory chunk */ | |
680 | if (crash_base + crash_size > chunk->addr + chunk->size) { | |
681 | *msg = "selected memory chunk is too small for " | |
682 | "crashkernel memory"; | |
683 | return -EINVAL; | |
684 | } | |
685 | return 0; | |
686 | } | |
687 | *msg = "invalid memory range specified"; | |
688 | return -EINVAL; | |
689 | } | |
690 | ||
691 | /* | |
692 | * Reserve kdump memory by creating a memory hole in the mem_chunk array | |
693 | */ | |
694 | static void __init reserve_kdump_bootmem(unsigned long addr, unsigned long size, | |
695 | int type) | |
696 | { | |
60a0c68d MH |
697 | create_mem_hole(memory_chunk, addr, size, type); |
698 | } | |
699 | ||
700 | /* | |
701 | * When kdump is enabled, we have to ensure that no memory from | |
702 | * the area [0 - crashkernel memory size] and | |
703 | * [crashk_res.start - crashk_res.end] is set offline. | |
704 | */ | |
705 | static int kdump_mem_notifier(struct notifier_block *nb, | |
706 | unsigned long action, void *data) | |
707 | { | |
708 | struct memory_notify *arg = data; | |
709 | ||
710 | if (arg->start_pfn < PFN_DOWN(resource_size(&crashk_res))) | |
711 | return NOTIFY_BAD; | |
712 | if (arg->start_pfn > PFN_DOWN(crashk_res.end)) | |
713 | return NOTIFY_OK; | |
714 | if (arg->start_pfn + arg->nr_pages - 1 < PFN_DOWN(crashk_res.start)) | |
715 | return NOTIFY_OK; | |
716 | return NOTIFY_BAD; | |
717 | } | |
718 | ||
719 | static struct notifier_block kdump_mem_nb = { | |
720 | .notifier_call = kdump_mem_notifier, | |
721 | }; | |
722 | ||
723 | #endif | |
724 | ||
725 | /* | |
726 | * Make sure that oldmem, where the dump is stored, is protected | |
727 | */ | |
728 | static void reserve_oldmem(void) | |
729 | { | |
730 | #ifdef CONFIG_CRASH_DUMP | |
731 | if (!OLDMEM_BASE) | |
732 | return; | |
733 | ||
734 | reserve_kdump_bootmem(OLDMEM_BASE, OLDMEM_SIZE, CHUNK_OLDMEM); | |
735 | reserve_kdump_bootmem(OLDMEM_SIZE, memory_end - OLDMEM_SIZE, | |
736 | CHUNK_OLDMEM); | |
737 | if (OLDMEM_BASE + OLDMEM_SIZE == real_memory_size) | |
738 | saved_max_pfn = PFN_DOWN(OLDMEM_BASE) - 1; | |
739 | else | |
740 | saved_max_pfn = PFN_DOWN(real_memory_size) - 1; | |
741 | #endif | |
742 | } | |
743 | ||
744 | /* | |
745 | * Reserve memory for kdump kernel to be loaded with kexec | |
746 | */ | |
747 | static void __init reserve_crashkernel(void) | |
748 | { | |
749 | #ifdef CONFIG_CRASH_DUMP | |
750 | unsigned long long crash_base, crash_size; | |
4fdf7f43 | 751 | char *msg = NULL; |
60a0c68d MH |
752 | int rc; |
753 | ||
754 | rc = parse_crashkernel(boot_command_line, memory_end, &crash_size, | |
755 | &crash_base); | |
756 | if (rc || crash_size == 0) | |
757 | return; | |
dab7a7b1 MH |
758 | crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN); |
759 | crash_size = ALIGN(crash_size, KEXEC_CRASH_MEM_ALIGN); | |
60a0c68d MH |
760 | if (register_memory_notifier(&kdump_mem_nb)) |
761 | return; | |
762 | if (!crash_base) | |
763 | crash_base = find_crash_base(crash_size, &msg); | |
764 | if (!crash_base) { | |
765 | pr_info("crashkernel reservation failed: %s\n", msg); | |
766 | unregister_memory_notifier(&kdump_mem_nb); | |
767 | return; | |
768 | } | |
769 | if (verify_crash_base(crash_base, crash_size, &msg)) { | |
770 | pr_info("crashkernel reservation failed: %s\n", msg); | |
771 | unregister_memory_notifier(&kdump_mem_nb); | |
772 | return; | |
773 | } | |
774 | if (!OLDMEM_BASE && MACHINE_IS_VM) | |
775 | diag10_range(PFN_DOWN(crash_base), PFN_DOWN(crash_size)); | |
776 | crashk_res.start = crash_base; | |
777 | crashk_res.end = crash_base + crash_size - 1; | |
778 | insert_resource(&iomem_resource, &crashk_res); | |
dab7a7b1 | 779 | reserve_kdump_bootmem(crash_base, crash_size, CHUNK_CRASHK); |
60a0c68d MH |
780 | pr_info("Reserving %lluMB of memory at %lluMB " |
781 | "for crashkernel (System RAM: %luMB)\n", | |
782 | crash_size >> 20, crash_base >> 20, memory_end >> 20); | |
4857d4bb | 783 | os_info_crashkernel_add(crash_base, crash_size); |
60a0c68d MH |
784 | #endif |
785 | } | |
786 | ||
8b646bd7 | 787 | static void __init setup_memory(void) |
c9e37353 HC |
788 | { |
789 | unsigned long bootmap_size; | |
fe355b7f | 790 | unsigned long start_pfn, end_pfn; |
c9e37353 | 791 | int i; |
1da177e4 LT |
792 | |
793 | /* | |
794 | * partially used pages are not usable - thus | |
795 | * we are rounding upwards: | |
796 | */ | |
65912a84 HC |
797 | start_pfn = PFN_UP(__pa(&_end)); |
798 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 799 | |
65912a84 HC |
800 | #ifdef CONFIG_BLK_DEV_INITRD |
801 | /* | |
802 | * Move the initrd in case the bitmap of the bootmem allocater | |
803 | * would overwrite it. | |
804 | */ | |
805 | ||
806 | if (INITRD_START && INITRD_SIZE) { | |
807 | unsigned long bmap_size; | |
808 | unsigned long start; | |
809 | ||
810 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
811 | bmap_size = PFN_PHYS(bmap_size); | |
812 | ||
813 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
814 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
815 | ||
60a0c68d MH |
816 | #ifdef CONFIG_CRASH_DUMP |
817 | if (OLDMEM_BASE) { | |
818 | /* Move initrd behind kdump oldmem */ | |
819 | if (start + INITRD_SIZE > OLDMEM_BASE && | |
820 | start < OLDMEM_BASE + OLDMEM_SIZE) | |
821 | start = OLDMEM_BASE + OLDMEM_SIZE; | |
822 | } | |
823 | #endif | |
65912a84 | 824 | if (start + INITRD_SIZE > memory_end) { |
3b6ed4ab MS |
825 | pr_err("initrd extends beyond end of " |
826 | "memory (0x%08lx > 0x%08lx) " | |
65912a84 HC |
827 | "disabling initrd\n", |
828 | start + INITRD_SIZE, memory_end); | |
829 | INITRD_START = INITRD_SIZE = 0; | |
830 | } else { | |
3b6ed4ab MS |
831 | pr_info("Moving initrd (0x%08lx -> " |
832 | "0x%08lx, size: %ld)\n", | |
833 | INITRD_START, start, INITRD_SIZE); | |
65912a84 HC |
834 | memmove((void *) start, (void *) INITRD_START, |
835 | INITRD_SIZE); | |
836 | INITRD_START = start; | |
837 | } | |
838 | } | |
839 | } | |
840 | #endif | |
841 | ||
1da177e4 | 842 | /* |
7676bef9 | 843 | * Initialize the boot-time allocator |
1da177e4 LT |
844 | */ |
845 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
846 | ||
847 | /* | |
848 | * Register RAM areas with the bootmem allocator. | |
849 | */ | |
c9e37353 | 850 | |
0b642ede | 851 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
39b742f9 | 852 | unsigned long start_chunk, end_chunk, pfn; |
1da177e4 | 853 | |
dab7a7b1 MH |
854 | if (memory_chunk[i].type != CHUNK_READ_WRITE && |
855 | memory_chunk[i].type != CHUNK_CRASHK) | |
1da177e4 | 856 | continue; |
39b742f9 | 857 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
fb2e7c5e | 858 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |
39b742f9 HC |
859 | end_chunk = min(end_chunk, end_pfn); |
860 | if (start_chunk >= end_chunk) | |
861 | continue; | |
ff38df37 TH |
862 | memblock_add_node(PFN_PHYS(start_chunk), |
863 | PFN_PHYS(end_chunk - start_chunk), 0); | |
39b742f9 | 864 | pfn = max(start_chunk, start_pfn); |
fb2e7c5e | 865 | for (; pfn < end_chunk; pfn++) |
e2b8d7af MS |
866 | page_set_storage_key(PFN_PHYS(pfn), |
867 | PAGE_DEFAULT_KEY, 0); | |
1da177e4 LT |
868 | } |
869 | ||
0b642ede PO |
870 | psw_set_key(PAGE_DEFAULT_KEY); |
871 | ||
39b742f9 | 872 | free_bootmem_with_active_regions(0, max_pfn); |
c9e37353 | 873 | |
615b04b3 HC |
874 | /* |
875 | * Reserve memory used for lowcore/command line/kernel image. | |
876 | */ | |
72a7fe39 | 877 | reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
615b04b3 | 878 | reserve_bootmem((unsigned long)_stext, |
72a7fe39 BW |
879 | PFN_PHYS(start_pfn) - (unsigned long)_stext, |
880 | BOOTMEM_DEFAULT); | |
c9e37353 HC |
881 | /* |
882 | * Reserve the bootmem bitmap itself as well. We do this in two | |
883 | * steps (first step was init_bootmem()) because this catches | |
884 | * the (very unlikely) case of us accidentally initializing the | |
885 | * bootmem allocator with an invalid RAM area. | |
886 | */ | |
72a7fe39 BW |
887 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, |
888 | BOOTMEM_DEFAULT); | |
1da177e4 | 889 | |
60a0c68d MH |
890 | #ifdef CONFIG_CRASH_DUMP |
891 | if (crashk_res.start) | |
892 | reserve_bootmem(crashk_res.start, | |
893 | crashk_res.end - crashk_res.start + 1, | |
894 | BOOTMEM_DEFAULT); | |
895 | if (is_kdump_kernel()) | |
896 | reserve_bootmem(elfcorehdr_addr - OLDMEM_BASE, | |
897 | PAGE_ALIGN(elfcorehdr_size), BOOTMEM_DEFAULT); | |
898 | #endif | |
1da177e4 | 899 | #ifdef CONFIG_BLK_DEV_INITRD |
65912a84 | 900 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 | 901 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
72a7fe39 BW |
902 | reserve_bootmem(INITRD_START, INITRD_SIZE, |
903 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
904 | initrd_start = INITRD_START; |
905 | initrd_end = initrd_start + INITRD_SIZE; | |
906 | } else { | |
3b6ed4ab MS |
907 | pr_err("initrd extends beyond end of " |
908 | "memory (0x%08lx > 0x%08lx) " | |
909 | "disabling initrd\n", | |
c9e37353 HC |
910 | initrd_start + INITRD_SIZE, memory_end); |
911 | initrd_start = initrd_end = 0; | |
1da177e4 | 912 | } |
c9e37353 | 913 | } |
1da177e4 | 914 | #endif |
c9e37353 | 915 | } |
1da177e4 | 916 | |
cf8ba7a9 MS |
917 | /* |
918 | * Setup hardware capabilities. | |
919 | */ | |
920 | static void __init setup_hwcaps(void) | |
921 | { | |
922 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; | |
94038a99 | 923 | struct cpuid cpu_id; |
cf8ba7a9 MS |
924 | int i; |
925 | ||
cf8ba7a9 MS |
926 | /* |
927 | * The store facility list bits numbers as found in the principles | |
928 | * of operation are numbered with bit 1UL<<31 as number 0 to | |
929 | * bit 1UL<<0 as number 31. | |
930 | * Bit 0: instructions named N3, "backported" to esa-mode | |
931 | * Bit 2: z/Architecture mode is active | |
932 | * Bit 7: the store-facility-list-extended facility is installed | |
933 | * Bit 17: the message-security assist is installed | |
934 | * Bit 19: the long-displacement facility is installed | |
935 | * Bit 21: the extended-immediate facility is installed | |
488253ce AK |
936 | * Bit 22: extended-translation facility 3 is installed |
937 | * Bit 30: extended-translation facility 3 enhancement facility | |
cf8ba7a9 MS |
938 | * These get translated to: |
939 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, | |
940 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, | |
488253ce AK |
941 | * HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and |
942 | * HWCAP_S390_ETF3EH bit 8 (22 && 30). | |
cf8ba7a9 MS |
943 | */ |
944 | for (i = 0; i < 6; i++) | |
14375bc4 | 945 | if (test_facility(stfl_bits[i])) |
cf8ba7a9 MS |
946 | elf_hwcap |= 1UL << i; |
947 | ||
14375bc4 | 948 | if (test_facility(22) && test_facility(30)) |
ea2a4d3a | 949 | elf_hwcap |= HWCAP_S390_ETF3EH; |
488253ce | 950 | |
cf8ba7a9 MS |
951 | /* |
952 | * Check for additional facilities with store-facility-list-extended. | |
953 | * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 | |
954 | * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information | |
955 | * as stored by stfl, bits 32-xxx contain additional facilities. | |
956 | * How many facility words are stored depends on the number of | |
25985edc | 957 | * doublewords passed to the instruction. The additional facilities |
cf8ba7a9 | 958 | * are: |
2ac3307f CE |
959 | * Bit 42: decimal floating point facility is installed |
960 | * Bit 44: perform floating point operation facility is installed | |
cf8ba7a9 | 961 | * translated to: |
488253ce | 962 | * HWCAP_S390_DFP bit 6 (42 && 44). |
cf8ba7a9 | 963 | */ |
14375bc4 MS |
964 | if ((elf_hwcap & (1UL << 2)) && test_facility(42) && test_facility(44)) |
965 | elf_hwcap |= HWCAP_S390_DFP; | |
cf8ba7a9 | 966 | |
ea2a4d3a HC |
967 | /* |
968 | * Huge page support HWCAP_S390_HPAGE is bit 7. | |
969 | */ | |
53492b1d | 970 | if (MACHINE_HAS_HPAGE) |
ea2a4d3a HC |
971 | elf_hwcap |= HWCAP_S390_HPAGE; |
972 | ||
973 | /* | |
974 | * 64-bit register support for 31-bit processes | |
975 | * HWCAP_S390_HIGH_GPRS is bit 9. | |
976 | */ | |
977 | elf_hwcap |= HWCAP_S390_HIGH_GPRS; | |
53492b1d | 978 | |
94038a99 MS |
979 | get_cpu_id(&cpu_id); |
980 | switch (cpu_id.machine) { | |
cf8ba7a9 MS |
981 | case 0x9672: |
982 | #if !defined(CONFIG_64BIT) | |
983 | default: /* Use "g5" as default for 31 bit kernels. */ | |
984 | #endif | |
985 | strcpy(elf_platform, "g5"); | |
986 | break; | |
987 | case 0x2064: | |
988 | case 0x2066: | |
989 | #if defined(CONFIG_64BIT) | |
990 | default: /* Use "z900" as default for 64 bit kernels. */ | |
991 | #endif | |
992 | strcpy(elf_platform, "z900"); | |
993 | break; | |
994 | case 0x2084: | |
995 | case 0x2086: | |
996 | strcpy(elf_platform, "z990"); | |
997 | break; | |
998 | case 0x2094: | |
9fee8db2 | 999 | case 0x2096: |
cf8ba7a9 MS |
1000 | strcpy(elf_platform, "z9-109"); |
1001 | break; | |
9fee8db2 MS |
1002 | case 0x2097: |
1003 | case 0x2098: | |
1004 | strcpy(elf_platform, "z10"); | |
1005 | break; | |
c84b9051 | 1006 | case 0x2817: |
3a81b171 | 1007 | case 0x2818: |
c84b9051 HC |
1008 | strcpy(elf_platform, "z196"); |
1009 | break; | |
cf8ba7a9 MS |
1010 | } |
1011 | } | |
1012 | ||
c9e37353 HC |
1013 | /* |
1014 | * Setup function called from init/main.c just after the banner | |
1015 | * was printed. | |
1016 | */ | |
1da177e4 | 1017 | |
8b646bd7 | 1018 | void __init setup_arch(char **cmdline_p) |
c9e37353 | 1019 | { |
1da177e4 | 1020 | /* |
c9e37353 | 1021 | * print what head.S has found out about the machine |
1da177e4 | 1022 | */ |
347a8dc3 | 1023 | #ifndef CONFIG_64BIT |
3b6ed4ab MS |
1024 | if (MACHINE_IS_VM) |
1025 | pr_info("Linux is running as a z/VM " | |
1026 | "guest operating system in 31-bit mode\n"); | |
27d71602 | 1027 | else if (MACHINE_IS_LPAR) |
3b6ed4ab MS |
1028 | pr_info("Linux is running natively in 31-bit mode\n"); |
1029 | if (MACHINE_HAS_IEEE) | |
1030 | pr_info("The hardware system has IEEE compatible " | |
1031 | "floating point units\n"); | |
1032 | else | |
1033 | pr_info("The hardware system has no IEEE compatible " | |
1034 | "floating point units\n"); | |
347a8dc3 | 1035 | #else /* CONFIG_64BIT */ |
fa587743 | 1036 | if (MACHINE_IS_VM) |
3b6ed4ab MS |
1037 | pr_info("Linux is running as a z/VM " |
1038 | "guest operating system in 64-bit mode\n"); | |
637952ca | 1039 | else if (MACHINE_IS_KVM) |
3b6ed4ab | 1040 | pr_info("Linux is running under KVM in 64-bit mode\n"); |
27d71602 | 1041 | else if (MACHINE_IS_LPAR) |
3b6ed4ab | 1042 | pr_info("Linux is running natively in 64-bit mode\n"); |
347a8dc3 | 1043 | #endif /* CONFIG_64BIT */ |
c9e37353 | 1044 | |
a0443fbb HB |
1045 | /* Have one command line that is parsed and saved in /proc/cmdline */ |
1046 | /* boot_command_line has been already set up in early.c */ | |
1047 | *cmdline_p = boot_command_line; | |
59685296 | 1048 | |
c9e37353 | 1049 | ROOT_DEV = Root_RAM0; |
59685296 HC |
1050 | |
1051 | init_mm.start_code = PAGE_OFFSET; | |
1052 | init_mm.end_code = (unsigned long) &_etext; | |
1053 | init_mm.end_data = (unsigned long) &_edata; | |
1054 | init_mm.brk = (unsigned long) &_end; | |
1055 | ||
6c2a9e6d GS |
1056 | if (MACHINE_HAS_MVCOS) |
1057 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); | |
1058 | else | |
1059 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); | |
1060 | ||
59685296 HC |
1061 | parse_early_param(); |
1062 | ||
4857d4bb | 1063 | os_info_init(); |
99ca4e58 | 1064 | setup_ipl(); |
8b62bc96 | 1065 | setup_memory_end(); |
c1821c2e | 1066 | setup_addressing_mode(); |
60a0c68d MH |
1067 | reserve_oldmem(); |
1068 | reserve_crashkernel(); | |
c9e37353 HC |
1069 | setup_memory(); |
1070 | setup_resources(); | |
d38593f9 | 1071 | setup_vmcoreinfo(); |
c9e37353 HC |
1072 | setup_lowcore(); |
1073 | ||
1da177e4 | 1074 | cpu_init(); |
dbd70fb4 | 1075 | s390_init_cpu_topology(); |
1da177e4 | 1076 | |
cf8ba7a9 MS |
1077 | /* |
1078 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). | |
1079 | */ | |
1080 | setup_hwcaps(); | |
1081 | ||
1da177e4 LT |
1082 | /* |
1083 | * Create kernel page tables and switch to virtual addressing. | |
1084 | */ | |
1085 | paging_init(); | |
1086 | ||
1087 | /* Setup default console */ | |
1088 | conmode_default(); | |
637952ca | 1089 | set_preferred_console(); |
411ed322 MH |
1090 | |
1091 | /* Setup zfcpdump support */ | |
1092 | setup_zfcpdump(console_devno); | |
1da177e4 | 1093 | } |