Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 | 2 | * S390 version |
a53c8fab | 3 | * Copyright IBM Corp. 1999, 2012 |
1da177e4 LT |
4 | * Author(s): Hartmut Penner (hp@de.ibm.com), |
5 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
6 | * | |
7 | * Derived from "arch/i386/kernel/setup.c" | |
8 | * Copyright (C) 1995, Linus Torvalds | |
9 | */ | |
10 | ||
11 | /* | |
12 | * This file handles the architecture-dependent parts of initialization | |
13 | */ | |
14 | ||
3b6ed4ab MS |
15 | #define KMSG_COMPONENT "setup" |
16 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
17 | ||
1da177e4 LT |
18 | #include <linux/errno.h> |
19 | #include <linux/module.h> | |
20 | #include <linux/sched.h> | |
21 | #include <linux/kernel.h> | |
ff38df37 | 22 | #include <linux/memblock.h> |
1da177e4 LT |
23 | #include <linux/mm.h> |
24 | #include <linux/stddef.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/ptrace.h> | |
1da177e4 | 27 | #include <linux/user.h> |
1da177e4 LT |
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> | |
1da177e4 | 36 | #include <linux/kernel_stat.h> |
1e8e3383 | 37 | #include <linux/device.h> |
585c3047 | 38 | #include <linux/notifier.h> |
65912a84 | 39 | #include <linux/pfn.h> |
fe355b7f | 40 | #include <linux/ctype.h> |
2b67fc46 | 41 | #include <linux/reboot.h> |
dbd70fb4 | 42 | #include <linux/topology.h> |
dfd9f7ab | 43 | #include <linux/ftrace.h> |
60a0c68d MH |
44 | #include <linux/kexec.h> |
45 | #include <linux/crash_dump.h> | |
46 | #include <linux/memory.h> | |
048cd4e5 | 47 | #include <linux/compat.h> |
1da177e4 | 48 | |
46b05d26 | 49 | #include <asm/ipl.h> |
1da177e4 | 50 | #include <asm/uaccess.h> |
1e3cab2f | 51 | #include <asm/facility.h> |
1da177e4 LT |
52 | #include <asm/smp.h> |
53 | #include <asm/mmu_context.h> | |
54 | #include <asm/cpcmd.h> | |
55 | #include <asm/lowcore.h> | |
56 | #include <asm/irq.h> | |
0b642ede PO |
57 | #include <asm/page.h> |
58 | #include <asm/ptrace.h> | |
cc13ad62 | 59 | #include <asm/sections.h> |
fe355b7f | 60 | #include <asm/ebcdic.h> |
faeba830 | 61 | #include <asm/kvm_virtio.h> |
60a0c68d | 62 | #include <asm/diag.h> |
4857d4bb | 63 | #include <asm/os_info.h> |
8b646bd7 | 64 | #include "entry.h" |
c1821c2e | 65 | |
b50511e4 MS |
66 | long psw_kernel_bits = PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_PRIMARY | |
67 | PSW_MASK_EA | PSW_MASK_BA; | |
68 | long psw_user_bits = PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | | |
69 | PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | | |
70 | PSW_MASK_PSTATE | PSW_ASC_HOME; | |
1da177e4 | 71 | |
d02765d1 GS |
72 | /* |
73 | * User copy operations. | |
74 | */ | |
75 | struct uaccess_ops uaccess; | |
d4ee453b | 76 | EXPORT_SYMBOL(uaccess); |
d02765d1 | 77 | |
1da177e4 LT |
78 | /* |
79 | * Machine setup.. | |
80 | */ | |
81 | unsigned int console_mode = 0; | |
1485c5c8 HC |
82 | EXPORT_SYMBOL(console_mode); |
83 | ||
1da177e4 | 84 | unsigned int console_devno = -1; |
1485c5c8 HC |
85 | EXPORT_SYMBOL(console_devno); |
86 | ||
1da177e4 | 87 | unsigned int console_irq = -1; |
1485c5c8 HC |
88 | EXPORT_SYMBOL(console_irq); |
89 | ||
cf8ba7a9 MS |
90 | unsigned long elf_hwcap = 0; |
91 | char elf_platform[ELF_PLATFORM_SIZE]; | |
36a2bd42 | 92 | |
23d17421 | 93 | struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
23d75d9c HC |
94 | |
95 | int __initdata memory_end_set; | |
96 | unsigned long __initdata memory_end; | |
1da177e4 | 97 | |
14045ebf MS |
98 | unsigned long VMALLOC_START; |
99 | EXPORT_SYMBOL(VMALLOC_START); | |
100 | ||
101 | unsigned long VMALLOC_END; | |
102 | EXPORT_SYMBOL(VMALLOC_END); | |
103 | ||
104 | struct page *vmemmap; | |
105 | EXPORT_SYMBOL(vmemmap); | |
106 | ||
099b7651 FM |
107 | /* An array with a pointer to the lowcore of every CPU. */ |
108 | struct _lowcore *lowcore_ptr[NR_CPUS]; | |
109 | EXPORT_SYMBOL(lowcore_ptr); | |
110 | ||
1da177e4 LT |
111 | /* |
112 | * This is set up by the setup-routine at boot-time | |
113 | * for S390 need to find out, what we have to setup | |
114 | * using address 0x10400 ... | |
115 | */ | |
116 | ||
117 | #include <asm/setup.h> | |
118 | ||
1da177e4 LT |
119 | /* |
120 | * condev= and conmode= setup parameter. | |
121 | */ | |
122 | ||
123 | static int __init condev_setup(char *str) | |
124 | { | |
125 | int vdev; | |
126 | ||
127 | vdev = simple_strtoul(str, &str, 0); | |
128 | if (vdev >= 0 && vdev < 65536) { | |
129 | console_devno = vdev; | |
130 | console_irq = -1; | |
131 | } | |
132 | return 1; | |
133 | } | |
134 | ||
135 | __setup("condev=", condev_setup); | |
136 | ||
637952ca HB |
137 | static void __init set_preferred_console(void) |
138 | { | |
c4de0c1a | 139 | if (MACHINE_IS_KVM) |
637952ca | 140 | add_preferred_console("hvc", 0, NULL); |
c4de0c1a | 141 | else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) |
637952ca | 142 | add_preferred_console("ttyS", 0, NULL); |
c4de0c1a | 143 | else if (CONSOLE_IS_3270) |
637952ca HB |
144 | add_preferred_console("tty3270", 0, NULL); |
145 | } | |
146 | ||
1da177e4 LT |
147 | static int __init conmode_setup(char *str) |
148 | { | |
8c0933ee | 149 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
150 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) |
151 | SET_CONSOLE_SCLP; | |
152 | #endif | |
153 | #if defined(CONFIG_TN3215_CONSOLE) | |
154 | if (strncmp(str, "3215", 5) == 0) | |
155 | SET_CONSOLE_3215; | |
156 | #endif | |
157 | #if defined(CONFIG_TN3270_CONSOLE) | |
158 | if (strncmp(str, "3270", 5) == 0) | |
159 | SET_CONSOLE_3270; | |
160 | #endif | |
637952ca | 161 | set_preferred_console(); |
1da177e4 LT |
162 | return 1; |
163 | } | |
164 | ||
165 | __setup("conmode=", conmode_setup); | |
166 | ||
167 | static void __init conmode_default(void) | |
168 | { | |
169 | char query_buffer[1024]; | |
170 | char *ptr; | |
171 | ||
172 | if (MACHINE_IS_VM) { | |
740b5706 | 173 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
174 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
175 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
176 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
740b5706 | 177 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
178 | ptr = strstr(query_buffer, "CONMODE"); |
179 | /* | |
180 | * Set the conmode to 3215 so that the device recognition | |
181 | * will set the cu_type of the console to 3215. If the | |
182 | * conmode is 3270 and we don't set it back then both | |
183 | * 3215 and the 3270 driver will try to access the console | |
184 | * device (3215 as console and 3270 as normal tty). | |
185 | */ | |
740b5706 | 186 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 | 187 | if (ptr == NULL) { |
8c0933ee | 188 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
189 | SET_CONSOLE_SCLP; |
190 | #endif | |
191 | return; | |
192 | } | |
193 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
194 | #if defined(CONFIG_TN3270_CONSOLE) | |
195 | SET_CONSOLE_3270; | |
196 | #elif defined(CONFIG_TN3215_CONSOLE) | |
197 | SET_CONSOLE_3215; | |
8c0933ee | 198 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
199 | SET_CONSOLE_SCLP; |
200 | #endif | |
201 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
202 | #if defined(CONFIG_TN3215_CONSOLE) | |
203 | SET_CONSOLE_3215; | |
204 | #elif defined(CONFIG_TN3270_CONSOLE) | |
205 | SET_CONSOLE_3270; | |
8c0933ee | 206 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
207 | SET_CONSOLE_SCLP; |
208 | #endif | |
209 | } | |
1da177e4 | 210 | } else { |
8c0933ee | 211 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
212 | SET_CONSOLE_SCLP; |
213 | #endif | |
214 | } | |
215 | } | |
216 | ||
59f2e69d | 217 | #ifdef CONFIG_ZFCPDUMP |
411ed322 MH |
218 | static void __init setup_zfcpdump(unsigned int console_devno) |
219 | { | |
a0443fbb | 220 | static char str[41]; |
411ed322 MH |
221 | |
222 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) | |
223 | return; | |
3f25dc4f MH |
224 | if (OLDMEM_BASE) |
225 | return; | |
411ed322 | 226 | if (console_devno != -1) |
a0443fbb | 227 | sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x", |
411ed322 MH |
228 | ipl_info.data.fcp.dev_id.devno, console_devno); |
229 | else | |
a0443fbb | 230 | sprintf(str, " cio_ignore=all,!0.0.%04x", |
411ed322 | 231 | ipl_info.data.fcp.dev_id.devno); |
a0443fbb | 232 | strcat(boot_command_line, str); |
411ed322 MH |
233 | console_loglevel = 2; |
234 | } | |
235 | #else | |
236 | static inline void setup_zfcpdump(unsigned int console_devno) {} | |
237 | #endif /* CONFIG_ZFCPDUMP */ | |
238 | ||
1da177e4 LT |
239 | /* |
240 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
241 | * _machine_halt or _machine_power_off. | |
242 | */ | |
243 | ||
244 | void machine_restart(char *command) | |
245 | { | |
7aa8dac7 | 246 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
06fa46a2 MS |
247 | /* |
248 | * Only unblank the console if we are called in enabled | |
249 | * context or a bust_spinlocks cleared the way for us. | |
250 | */ | |
251 | console_unblank(); | |
1da177e4 LT |
252 | _machine_restart(command); |
253 | } | |
254 | ||
1da177e4 LT |
255 | void machine_halt(void) |
256 | { | |
06fa46a2 MS |
257 | if (!in_interrupt() || oops_in_progress) |
258 | /* | |
259 | * Only unblank the console if we are called in enabled | |
260 | * context or a bust_spinlocks cleared the way for us. | |
261 | */ | |
262 | console_unblank(); | |
1da177e4 LT |
263 | _machine_halt(); |
264 | } | |
265 | ||
1da177e4 LT |
266 | void machine_power_off(void) |
267 | { | |
06fa46a2 MS |
268 | if (!in_interrupt() || oops_in_progress) |
269 | /* | |
270 | * Only unblank the console if we are called in enabled | |
271 | * context or a bust_spinlocks cleared the way for us. | |
272 | */ | |
273 | console_unblank(); | |
1da177e4 LT |
274 | _machine_power_off(); |
275 | } | |
276 | ||
53df751c MS |
277 | /* |
278 | * Dummy power off function. | |
279 | */ | |
280 | void (*pm_power_off)(void) = machine_power_off; | |
281 | ||
59685296 HC |
282 | static int __init early_parse_mem(char *p) |
283 | { | |
284 | memory_end = memparse(p, &p); | |
23d75d9c | 285 | memory_end_set = 1; |
59685296 HC |
286 | return 0; |
287 | } | |
288 | early_param("mem", early_parse_mem); | |
289 | ||
14045ebf MS |
290 | static int __init parse_vmalloc(char *arg) |
291 | { | |
292 | if (!arg) | |
293 | return -EINVAL; | |
294 | VMALLOC_END = (memparse(arg, &arg) + PAGE_SIZE - 1) & PAGE_MASK; | |
295 | return 0; | |
296 | } | |
297 | early_param("vmalloc", parse_vmalloc); | |
298 | ||
b11b5334 MS |
299 | unsigned int user_mode = HOME_SPACE_MODE; |
300 | EXPORT_SYMBOL_GPL(user_mode); | |
c1821c2e | 301 | |
b50511e4 | 302 | static int set_amode_primary(void) |
c1821c2e | 303 | { |
b50511e4 MS |
304 | psw_kernel_bits = (psw_kernel_bits & ~PSW_MASK_ASC) | PSW_ASC_HOME; |
305 | psw_user_bits = (psw_user_bits & ~PSW_MASK_ASC) | PSW_ASC_PRIMARY; | |
c1821c2e | 306 | #ifdef CONFIG_COMPAT |
b50511e4 MS |
307 | psw32_user_bits = |
308 | (psw32_user_bits & ~PSW32_MASK_ASC) | PSW32_ASC_PRIMARY; | |
c1821c2e | 309 | #endif |
c1821c2e GS |
310 | |
311 | if (MACHINE_HAS_MVCOS) { | |
c1821c2e | 312 | memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); |
3b6ed4ab | 313 | return 1; |
c1821c2e | 314 | } else { |
c1821c2e | 315 | memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); |
3b6ed4ab | 316 | return 0; |
c1821c2e GS |
317 | } |
318 | } | |
319 | ||
320 | /* | |
321 | * Switch kernel/user addressing modes? | |
322 | */ | |
323 | static int __init early_parse_switch_amode(char *p) | |
324 | { | |
043d0708 | 325 | user_mode = PRIMARY_SPACE_MODE; |
c1821c2e GS |
326 | return 0; |
327 | } | |
328 | early_param("switch_amode", early_parse_switch_amode); | |
329 | ||
b11b5334 | 330 | static int __init early_parse_user_mode(char *p) |
c1821c2e | 331 | { |
b11b5334 MS |
332 | if (p && strcmp(p, "primary") == 0) |
333 | user_mode = PRIMARY_SPACE_MODE; | |
b11b5334 MS |
334 | else if (!p || strcmp(p, "home") == 0) |
335 | user_mode = HOME_SPACE_MODE; | |
336 | else | |
337 | return 1; | |
3b6ed4ab | 338 | return 0; |
c1821c2e | 339 | } |
b11b5334 | 340 | early_param("user_mode", early_parse_user_mode); |
c1821c2e | 341 | |
c1821c2e GS |
342 | static void setup_addressing_mode(void) |
343 | { | |
043d0708 | 344 | if (user_mode == PRIMARY_SPACE_MODE) { |
b50511e4 | 345 | if (set_amode_primary()) |
3b6ed4ab MS |
346 | pr_info("Address spaces switched, " |
347 | "mvcos available\n"); | |
348 | else | |
349 | pr_info("Address spaces switched, " | |
350 | "mvcos not available\n"); | |
c1821c2e GS |
351 | } |
352 | } | |
353 | ||
8b646bd7 MS |
354 | void *restart_stack __attribute__((__section__(".data"))); |
355 | ||
356 | static void __init setup_lowcore(void) | |
c9e37353 HC |
357 | { |
358 | struct _lowcore *lc; | |
c9e37353 HC |
359 | |
360 | /* | |
361 | * Setup lowcore for boot cpu | |
362 | */ | |
cbb870c8 | 363 | BUILD_BUG_ON(sizeof(struct _lowcore) != LC_PAGES * 4096); |
a0878656 | 364 | lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0); |
b50511e4 | 365 | lc->restart_psw.mask = psw_kernel_bits; |
c9e37353 | 366 | lc->restart_psw.addr = |
8b646bd7 | 367 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; |
b50511e4 MS |
368 | lc->external_new_psw.mask = psw_kernel_bits | |
369 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 HC |
370 | lc->external_new_psw.addr = |
371 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
b50511e4 MS |
372 | lc->svc_new_psw.mask = psw_kernel_bits | |
373 | PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK; | |
c9e37353 | 374 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
b50511e4 MS |
375 | lc->program_new_psw.mask = psw_kernel_bits | |
376 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 | 377 | lc->program_new_psw.addr = |
b50511e4 MS |
378 | PSW_ADDR_AMODE | (unsigned long) pgm_check_handler; |
379 | lc->mcck_new_psw.mask = psw_kernel_bits; | |
c9e37353 HC |
380 | lc->mcck_new_psw.addr = |
381 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
b50511e4 MS |
382 | lc->io_new_psw.mask = psw_kernel_bits | |
383 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 | 384 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
5a62b192 | 385 | lc->clock_comparator = -1ULL; |
c9e37353 HC |
386 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; |
387 | lc->async_stack = (unsigned long) | |
388 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; | |
c9e37353 HC |
389 | lc->panic_stack = (unsigned long) |
390 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; | |
c9e37353 HC |
391 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
392 | lc->thread_info = (unsigned long) &init_thread_union; | |
25097bf1 | 393 | lc->machine_flags = S390_lowcore.machine_flags; |
14375bc4 MS |
394 | lc->stfl_fac_list = S390_lowcore.stfl_fac_list; |
395 | memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, | |
396 | MAX_FACILITY_BIT/8); | |
347a8dc3 | 397 | #ifndef CONFIG_64BIT |
77fa2245 HC |
398 | if (MACHINE_HAS_IEEE) { |
399 | lc->extended_save_area_addr = (__u32) | |
a0878656 | 400 | __alloc_bootmem_low(PAGE_SIZE, PAGE_SIZE, 0); |
77fa2245 | 401 | /* enable extended save area */ |
c4972f33 | 402 | __ctl_set_bit(14, 29); |
77fa2245 | 403 | } |
c742b31c MS |
404 | #else |
405 | lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; | |
77fa2245 | 406 | #endif |
ab96e798 MS |
407 | lc->sync_enter_timer = S390_lowcore.sync_enter_timer; |
408 | lc->async_enter_timer = S390_lowcore.async_enter_timer; | |
409 | lc->exit_timer = S390_lowcore.exit_timer; | |
410 | lc->user_timer = S390_lowcore.user_timer; | |
411 | lc->system_timer = S390_lowcore.system_timer; | |
412 | lc->steal_timer = S390_lowcore.steal_timer; | |
413 | lc->last_update_timer = S390_lowcore.last_update_timer; | |
414 | lc->last_update_clock = S390_lowcore.last_update_clock; | |
dfd9f7ab | 415 | lc->ftrace_func = S390_lowcore.ftrace_func; |
8b646bd7 MS |
416 | |
417 | restart_stack = __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0); | |
418 | restart_stack += ASYNC_SIZE; | |
419 | ||
420 | /* | |
421 | * Set up PSW restart to call ipl.c:do_restart(). Copy the relevant | |
422 | * restart data to the absolute zero lowcore. This is necesary if | |
423 | * PSW restart is done on an offline CPU that has lowcore zero. | |
424 | */ | |
425 | lc->restart_stack = (unsigned long) restart_stack; | |
426 | lc->restart_fn = (unsigned long) do_restart; | |
427 | lc->restart_data = 0; | |
428 | lc->restart_source = -1UL; | |
73bf463e MH |
429 | |
430 | /* Setup absolute zero lowcore */ | |
fbe76568 HC |
431 | mem_assign_absolute(S390_lowcore.restart_stack, lc->restart_stack); |
432 | mem_assign_absolute(S390_lowcore.restart_fn, lc->restart_fn); | |
433 | mem_assign_absolute(S390_lowcore.restart_data, lc->restart_data); | |
434 | mem_assign_absolute(S390_lowcore.restart_source, lc->restart_source); | |
435 | mem_assign_absolute(S390_lowcore.restart_psw, lc->restart_psw); | |
8b646bd7 | 436 | |
c9e37353 | 437 | set_prefix((u32)(unsigned long) lc); |
099b7651 | 438 | lowcore_ptr[0] = lc; |
c9e37353 HC |
439 | } |
440 | ||
71189284 HC |
441 | static struct resource code_resource = { |
442 | .name = "Kernel code", | |
443 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
444 | }; | |
445 | ||
446 | static struct resource data_resource = { | |
447 | .name = "Kernel data", | |
448 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
449 | }; | |
450 | ||
4cc69531 HC |
451 | static struct resource bss_resource = { |
452 | .name = "Kernel bss", | |
453 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
454 | }; | |
455 | ||
71189284 HC |
456 | static struct resource __initdata *standard_resources[] = { |
457 | &code_resource, | |
458 | &data_resource, | |
4cc69531 | 459 | &bss_resource, |
71189284 HC |
460 | }; |
461 | ||
462 | static void __init setup_resources(void) | |
c9e37353 | 463 | { |
71189284 HC |
464 | struct resource *res, *std_res, *sub_res; |
465 | int i, j; | |
c9e37353 | 466 | |
cc13ad62 HC |
467 | code_resource.start = (unsigned long) &_text; |
468 | code_resource.end = (unsigned long) &_etext - 1; | |
469 | data_resource.start = (unsigned long) &_etext; | |
470 | data_resource.end = (unsigned long) &_edata - 1; | |
4cc69531 HC |
471 | bss_resource.start = (unsigned long) &__bss_start; |
472 | bss_resource.end = (unsigned long) &__bss_stop - 1; | |
cc13ad62 | 473 | |
9f4b0ba8 HC |
474 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
475 | if (!memory_chunk[i].size) | |
476 | continue; | |
60a0c68d MH |
477 | if (memory_chunk[i].type == CHUNK_OLDMEM || |
478 | memory_chunk[i].type == CHUNK_CRASHK) | |
479 | continue; | |
71189284 | 480 | res = alloc_bootmem_low(sizeof(*res)); |
c9e37353 HC |
481 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; |
482 | switch (memory_chunk[i].type) { | |
483 | case CHUNK_READ_WRITE: | |
dab7a7b1 | 484 | case CHUNK_CRASHK: |
c9e37353 HC |
485 | res->name = "System RAM"; |
486 | break; | |
487 | case CHUNK_READ_ONLY: | |
488 | res->name = "System ROM"; | |
489 | res->flags |= IORESOURCE_READONLY; | |
490 | break; | |
491 | default: | |
492 | res->name = "reserved"; | |
493 | } | |
494 | res->start = memory_chunk[i].addr; | |
71189284 | 495 | res->end = res->start + memory_chunk[i].size - 1; |
c9e37353 | 496 | request_resource(&iomem_resource, res); |
fe355b7f | 497 | |
71189284 HC |
498 | for (j = 0; j < ARRAY_SIZE(standard_resources); j++) { |
499 | std_res = standard_resources[j]; | |
500 | if (std_res->start < res->start || | |
501 | std_res->start > res->end) | |
502 | continue; | |
503 | if (std_res->end > res->end) { | |
504 | sub_res = alloc_bootmem_low(sizeof(*sub_res)); | |
505 | *sub_res = *std_res; | |
506 | sub_res->end = res->end; | |
507 | std_res->start = res->end + 1; | |
508 | request_resource(res, sub_res); | |
509 | } else { | |
510 | request_resource(res, std_res); | |
511 | } | |
fe355b7f | 512 | } |
c9e37353 HC |
513 | } |
514 | } | |
515 | ||
411ed322 MH |
516 | unsigned long real_memory_size; |
517 | EXPORT_SYMBOL_GPL(real_memory_size); | |
518 | ||
8b62bc96 HC |
519 | static void __init setup_memory_end(void) |
520 | { | |
14045ebf | 521 | unsigned long vmax, vmalloc_size, tmp; |
8b62bc96 HC |
522 | int i; |
523 | ||
60a0c68d | 524 | |
59f2e69d | 525 | #ifdef CONFIG_ZFCPDUMP |
3f25dc4f | 526 | if (ipl_info.type == IPL_TYPE_FCP_DUMP && !OLDMEM_BASE) { |
411ed322 | 527 | memory_end = ZFCPDUMP_HSA_SIZE; |
23d75d9c HC |
528 | memory_end_set = 1; |
529 | } | |
411ed322 | 530 | #endif |
14045ebf | 531 | real_memory_size = 0; |
8b62bc96 HC |
532 | memory_end &= PAGE_MASK; |
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 | } | |
14045ebf MS |
553 | real_memory_size = max(real_memory_size, |
554 | chunk->addr + chunk->size); | |
9f4b0ba8 HC |
555 | } |
556 | ||
14045ebf MS |
557 | /* Choose kernel address space layout: 2, 3, or 4 levels. */ |
558 | #ifdef CONFIG_64BIT | |
559 | vmalloc_size = VMALLOC_END ?: 128UL << 30; | |
560 | tmp = (memory_end ?: real_memory_size) / PAGE_SIZE; | |
561 | tmp = tmp * (sizeof(struct page) + PAGE_SIZE) + vmalloc_size; | |
562 | if (tmp <= (1UL << 42)) | |
563 | vmax = 1UL << 42; /* 3-level kernel page table */ | |
564 | else | |
565 | vmax = 1UL << 53; /* 4-level kernel page table */ | |
566 | #else | |
567 | vmalloc_size = VMALLOC_END ?: 96UL << 20; | |
568 | vmax = 1UL << 31; /* 2-level kernel page table */ | |
569 | #endif | |
570 | /* vmalloc area is at the end of the kernel address space. */ | |
571 | VMALLOC_END = vmax; | |
572 | VMALLOC_START = vmax - vmalloc_size; | |
573 | ||
574 | /* Split remaining virtual space between 1:1 mapping & vmemmap array */ | |
575 | tmp = VMALLOC_START / (PAGE_SIZE + sizeof(struct page)); | |
576 | tmp = VMALLOC_START - tmp * sizeof(struct page); | |
577 | tmp &= ~((vmax >> 11) - 1); /* align to page table level */ | |
578 | tmp = min(tmp, 1UL << MAX_PHYSMEM_BITS); | |
579 | vmemmap = (struct page *) tmp; | |
580 | ||
581 | /* Take care that memory_end is set and <= vmemmap */ | |
582 | memory_end = min(memory_end ?: real_memory_size, tmp); | |
583 | ||
584 | /* Fixup memory chunk array to fit into 0..memory_end */ | |
8b62bc96 HC |
585 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
586 | struct mem_chunk *chunk = &memory_chunk[i]; | |
587 | ||
14045ebf | 588 | if (chunk->addr >= memory_end) { |
8b62bc96 HC |
589 | memset(chunk, 0, sizeof(*chunk)); |
590 | continue; | |
591 | } | |
14045ebf MS |
592 | if (chunk->addr + chunk->size > memory_end) |
593 | chunk->size = memory_end - chunk->addr; | |
8b62bc96 | 594 | } |
8b62bc96 HC |
595 | } |
596 | ||
d38593f9 MH |
597 | static void __init setup_vmcoreinfo(void) |
598 | { | |
599 | #ifdef CONFIG_KEXEC | |
fbe76568 | 600 | mem_assign_absolute(S390_lowcore.vmcore_info, paddr_vmcoreinfo_note()); |
d38593f9 MH |
601 | #endif |
602 | } | |
603 | ||
60a0c68d MH |
604 | #ifdef CONFIG_CRASH_DUMP |
605 | ||
606 | /* | |
607 | * Find suitable location for crashkernel memory | |
608 | */ | |
609 | static unsigned long __init find_crash_base(unsigned long crash_size, | |
610 | char **msg) | |
611 | { | |
612 | unsigned long crash_base; | |
613 | struct mem_chunk *chunk; | |
614 | int i; | |
615 | ||
616 | if (memory_chunk[0].size < crash_size) { | |
617 | *msg = "first memory chunk must be at least crashkernel size"; | |
618 | return 0; | |
619 | } | |
5f894cbb | 620 | if (OLDMEM_BASE && crash_size == OLDMEM_SIZE) |
60a0c68d MH |
621 | return OLDMEM_BASE; |
622 | ||
623 | for (i = MEMORY_CHUNKS - 1; i >= 0; i--) { | |
624 | chunk = &memory_chunk[i]; | |
625 | if (chunk->size == 0) | |
626 | continue; | |
627 | if (chunk->type != CHUNK_READ_WRITE) | |
628 | continue; | |
629 | if (chunk->size < crash_size) | |
630 | continue; | |
631 | crash_base = (chunk->addr + chunk->size) - crash_size; | |
632 | if (crash_base < crash_size) | |
633 | continue; | |
634 | if (crash_base < ZFCPDUMP_HSA_SIZE_MAX) | |
635 | continue; | |
636 | if (crash_base < (unsigned long) INITRD_START + INITRD_SIZE) | |
637 | continue; | |
638 | return crash_base; | |
639 | } | |
640 | *msg = "no suitable area found"; | |
641 | return 0; | |
642 | } | |
643 | ||
644 | /* | |
645 | * Check if crash_base and crash_size is valid | |
646 | */ | |
647 | static int __init verify_crash_base(unsigned long crash_base, | |
648 | unsigned long crash_size, | |
649 | char **msg) | |
650 | { | |
651 | struct mem_chunk *chunk; | |
652 | int i; | |
653 | ||
654 | /* | |
655 | * Because we do the swap to zero, we must have at least 'crash_size' | |
656 | * bytes free space before crash_base | |
657 | */ | |
658 | if (crash_size > crash_base) { | |
659 | *msg = "crashkernel offset must be greater than size"; | |
660 | return -EINVAL; | |
661 | } | |
662 | ||
663 | /* First memory chunk must be at least crash_size */ | |
664 | if (memory_chunk[0].size < crash_size) { | |
665 | *msg = "first memory chunk must be at least crashkernel size"; | |
666 | return -EINVAL; | |
667 | } | |
668 | /* Check if we fit into the respective memory chunk */ | |
669 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
670 | chunk = &memory_chunk[i]; | |
671 | if (chunk->size == 0) | |
672 | continue; | |
673 | if (crash_base < chunk->addr) | |
674 | continue; | |
675 | if (crash_base >= chunk->addr + chunk->size) | |
676 | continue; | |
677 | /* we have found the memory chunk */ | |
678 | if (crash_base + crash_size > chunk->addr + chunk->size) { | |
679 | *msg = "selected memory chunk is too small for " | |
680 | "crashkernel memory"; | |
681 | return -EINVAL; | |
682 | } | |
683 | return 0; | |
684 | } | |
685 | *msg = "invalid memory range specified"; | |
686 | return -EINVAL; | |
687 | } | |
688 | ||
689 | /* | |
690 | * Reserve kdump memory by creating a memory hole in the mem_chunk array | |
691 | */ | |
692 | static void __init reserve_kdump_bootmem(unsigned long addr, unsigned long size, | |
693 | int type) | |
694 | { | |
60a0c68d MH |
695 | create_mem_hole(memory_chunk, addr, size, type); |
696 | } | |
697 | ||
698 | /* | |
699 | * When kdump is enabled, we have to ensure that no memory from | |
700 | * the area [0 - crashkernel memory size] and | |
701 | * [crashk_res.start - crashk_res.end] is set offline. | |
702 | */ | |
703 | static int kdump_mem_notifier(struct notifier_block *nb, | |
704 | unsigned long action, void *data) | |
705 | { | |
706 | struct memory_notify *arg = data; | |
707 | ||
708 | if (arg->start_pfn < PFN_DOWN(resource_size(&crashk_res))) | |
709 | return NOTIFY_BAD; | |
710 | if (arg->start_pfn > PFN_DOWN(crashk_res.end)) | |
711 | return NOTIFY_OK; | |
712 | if (arg->start_pfn + arg->nr_pages - 1 < PFN_DOWN(crashk_res.start)) | |
713 | return NOTIFY_OK; | |
714 | return NOTIFY_BAD; | |
715 | } | |
716 | ||
717 | static struct notifier_block kdump_mem_nb = { | |
718 | .notifier_call = kdump_mem_notifier, | |
719 | }; | |
720 | ||
721 | #endif | |
722 | ||
723 | /* | |
724 | * Make sure that oldmem, where the dump is stored, is protected | |
725 | */ | |
726 | static void reserve_oldmem(void) | |
727 | { | |
728 | #ifdef CONFIG_CRASH_DUMP | |
729 | if (!OLDMEM_BASE) | |
730 | return; | |
731 | ||
732 | reserve_kdump_bootmem(OLDMEM_BASE, OLDMEM_SIZE, CHUNK_OLDMEM); | |
733 | reserve_kdump_bootmem(OLDMEM_SIZE, memory_end - OLDMEM_SIZE, | |
734 | CHUNK_OLDMEM); | |
735 | if (OLDMEM_BASE + OLDMEM_SIZE == real_memory_size) | |
736 | saved_max_pfn = PFN_DOWN(OLDMEM_BASE) - 1; | |
737 | else | |
738 | saved_max_pfn = PFN_DOWN(real_memory_size) - 1; | |
739 | #endif | |
740 | } | |
741 | ||
742 | /* | |
743 | * Reserve memory for kdump kernel to be loaded with kexec | |
744 | */ | |
745 | static void __init reserve_crashkernel(void) | |
746 | { | |
747 | #ifdef CONFIG_CRASH_DUMP | |
748 | unsigned long long crash_base, crash_size; | |
4fdf7f43 | 749 | char *msg = NULL; |
60a0c68d MH |
750 | int rc; |
751 | ||
752 | rc = parse_crashkernel(boot_command_line, memory_end, &crash_size, | |
753 | &crash_base); | |
754 | if (rc || crash_size == 0) | |
755 | return; | |
dab7a7b1 MH |
756 | crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN); |
757 | crash_size = ALIGN(crash_size, KEXEC_CRASH_MEM_ALIGN); | |
60a0c68d MH |
758 | if (register_memory_notifier(&kdump_mem_nb)) |
759 | return; | |
760 | if (!crash_base) | |
761 | crash_base = find_crash_base(crash_size, &msg); | |
762 | if (!crash_base) { | |
763 | pr_info("crashkernel reservation failed: %s\n", msg); | |
764 | unregister_memory_notifier(&kdump_mem_nb); | |
765 | return; | |
766 | } | |
767 | if (verify_crash_base(crash_base, crash_size, &msg)) { | |
768 | pr_info("crashkernel reservation failed: %s\n", msg); | |
769 | unregister_memory_notifier(&kdump_mem_nb); | |
770 | return; | |
771 | } | |
772 | if (!OLDMEM_BASE && MACHINE_IS_VM) | |
773 | diag10_range(PFN_DOWN(crash_base), PFN_DOWN(crash_size)); | |
774 | crashk_res.start = crash_base; | |
775 | crashk_res.end = crash_base + crash_size - 1; | |
776 | insert_resource(&iomem_resource, &crashk_res); | |
dab7a7b1 | 777 | reserve_kdump_bootmem(crash_base, crash_size, CHUNK_CRASHK); |
60a0c68d MH |
778 | pr_info("Reserving %lluMB of memory at %lluMB " |
779 | "for crashkernel (System RAM: %luMB)\n", | |
780 | crash_size >> 20, crash_base >> 20, memory_end >> 20); | |
4857d4bb | 781 | os_info_crashkernel_add(crash_base, crash_size); |
60a0c68d MH |
782 | #endif |
783 | } | |
784 | ||
8b646bd7 | 785 | static void __init setup_memory(void) |
c9e37353 HC |
786 | { |
787 | unsigned long bootmap_size; | |
fe355b7f | 788 | unsigned long start_pfn, end_pfn; |
c9e37353 | 789 | int i; |
1da177e4 LT |
790 | |
791 | /* | |
792 | * partially used pages are not usable - thus | |
793 | * we are rounding upwards: | |
794 | */ | |
65912a84 HC |
795 | start_pfn = PFN_UP(__pa(&_end)); |
796 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 797 | |
65912a84 HC |
798 | #ifdef CONFIG_BLK_DEV_INITRD |
799 | /* | |
800 | * Move the initrd in case the bitmap of the bootmem allocater | |
801 | * would overwrite it. | |
802 | */ | |
803 | ||
804 | if (INITRD_START && INITRD_SIZE) { | |
805 | unsigned long bmap_size; | |
806 | unsigned long start; | |
807 | ||
808 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
809 | bmap_size = PFN_PHYS(bmap_size); | |
810 | ||
811 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
812 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
813 | ||
60a0c68d MH |
814 | #ifdef CONFIG_CRASH_DUMP |
815 | if (OLDMEM_BASE) { | |
816 | /* Move initrd behind kdump oldmem */ | |
817 | if (start + INITRD_SIZE > OLDMEM_BASE && | |
818 | start < OLDMEM_BASE + OLDMEM_SIZE) | |
819 | start = OLDMEM_BASE + OLDMEM_SIZE; | |
820 | } | |
821 | #endif | |
65912a84 | 822 | if (start + INITRD_SIZE > memory_end) { |
3b6ed4ab MS |
823 | pr_err("initrd extends beyond end of " |
824 | "memory (0x%08lx > 0x%08lx) " | |
65912a84 HC |
825 | "disabling initrd\n", |
826 | start + INITRD_SIZE, memory_end); | |
827 | INITRD_START = INITRD_SIZE = 0; | |
828 | } else { | |
3b6ed4ab MS |
829 | pr_info("Moving initrd (0x%08lx -> " |
830 | "0x%08lx, size: %ld)\n", | |
831 | INITRD_START, start, INITRD_SIZE); | |
65912a84 HC |
832 | memmove((void *) start, (void *) INITRD_START, |
833 | INITRD_SIZE); | |
834 | INITRD_START = start; | |
835 | } | |
836 | } | |
837 | } | |
838 | #endif | |
839 | ||
1da177e4 | 840 | /* |
7676bef9 | 841 | * Initialize the boot-time allocator |
1da177e4 LT |
842 | */ |
843 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
844 | ||
845 | /* | |
846 | * Register RAM areas with the bootmem allocator. | |
847 | */ | |
c9e37353 | 848 | |
0b642ede | 849 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
39b742f9 | 850 | unsigned long start_chunk, end_chunk, pfn; |
1da177e4 | 851 | |
dab7a7b1 MH |
852 | if (memory_chunk[i].type != CHUNK_READ_WRITE && |
853 | memory_chunk[i].type != CHUNK_CRASHK) | |
1da177e4 | 854 | continue; |
39b742f9 | 855 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
fb2e7c5e | 856 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |
39b742f9 HC |
857 | end_chunk = min(end_chunk, end_pfn); |
858 | if (start_chunk >= end_chunk) | |
859 | continue; | |
ff38df37 TH |
860 | memblock_add_node(PFN_PHYS(start_chunk), |
861 | PFN_PHYS(end_chunk - start_chunk), 0); | |
39b742f9 | 862 | pfn = max(start_chunk, start_pfn); |
fb2e7c5e | 863 | for (; pfn < end_chunk; pfn++) |
e2b8d7af MS |
864 | page_set_storage_key(PFN_PHYS(pfn), |
865 | PAGE_DEFAULT_KEY, 0); | |
1da177e4 LT |
866 | } |
867 | ||
0b642ede PO |
868 | psw_set_key(PAGE_DEFAULT_KEY); |
869 | ||
39b742f9 | 870 | free_bootmem_with_active_regions(0, max_pfn); |
c9e37353 | 871 | |
615b04b3 HC |
872 | /* |
873 | * Reserve memory used for lowcore/command line/kernel image. | |
874 | */ | |
72a7fe39 | 875 | reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
615b04b3 | 876 | reserve_bootmem((unsigned long)_stext, |
72a7fe39 BW |
877 | PFN_PHYS(start_pfn) - (unsigned long)_stext, |
878 | BOOTMEM_DEFAULT); | |
c9e37353 HC |
879 | /* |
880 | * Reserve the bootmem bitmap itself as well. We do this in two | |
881 | * steps (first step was init_bootmem()) because this catches | |
882 | * the (very unlikely) case of us accidentally initializing the | |
883 | * bootmem allocator with an invalid RAM area. | |
884 | */ | |
72a7fe39 BW |
885 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, |
886 | BOOTMEM_DEFAULT); | |
1da177e4 | 887 | |
60a0c68d MH |
888 | #ifdef CONFIG_CRASH_DUMP |
889 | if (crashk_res.start) | |
890 | reserve_bootmem(crashk_res.start, | |
891 | crashk_res.end - crashk_res.start + 1, | |
892 | BOOTMEM_DEFAULT); | |
893 | if (is_kdump_kernel()) | |
894 | reserve_bootmem(elfcorehdr_addr - OLDMEM_BASE, | |
895 | PAGE_ALIGN(elfcorehdr_size), BOOTMEM_DEFAULT); | |
896 | #endif | |
1da177e4 | 897 | #ifdef CONFIG_BLK_DEV_INITRD |
65912a84 | 898 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 | 899 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
72a7fe39 BW |
900 | reserve_bootmem(INITRD_START, INITRD_SIZE, |
901 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
902 | initrd_start = INITRD_START; |
903 | initrd_end = initrd_start + INITRD_SIZE; | |
904 | } else { | |
3b6ed4ab MS |
905 | pr_err("initrd extends beyond end of " |
906 | "memory (0x%08lx > 0x%08lx) " | |
907 | "disabling initrd\n", | |
c9e37353 HC |
908 | initrd_start + INITRD_SIZE, memory_end); |
909 | initrd_start = initrd_end = 0; | |
1da177e4 | 910 | } |
c9e37353 | 911 | } |
1da177e4 | 912 | #endif |
c9e37353 | 913 | } |
1da177e4 | 914 | |
cf8ba7a9 MS |
915 | /* |
916 | * Setup hardware capabilities. | |
917 | */ | |
918 | static void __init setup_hwcaps(void) | |
919 | { | |
920 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; | |
94038a99 | 921 | struct cpuid cpu_id; |
cf8ba7a9 MS |
922 | int i; |
923 | ||
cf8ba7a9 MS |
924 | /* |
925 | * The store facility list bits numbers as found in the principles | |
926 | * of operation are numbered with bit 1UL<<31 as number 0 to | |
927 | * bit 1UL<<0 as number 31. | |
928 | * Bit 0: instructions named N3, "backported" to esa-mode | |
929 | * Bit 2: z/Architecture mode is active | |
930 | * Bit 7: the store-facility-list-extended facility is installed | |
931 | * Bit 17: the message-security assist is installed | |
932 | * Bit 19: the long-displacement facility is installed | |
933 | * Bit 21: the extended-immediate facility is installed | |
488253ce AK |
934 | * Bit 22: extended-translation facility 3 is installed |
935 | * Bit 30: extended-translation facility 3 enhancement facility | |
cf8ba7a9 MS |
936 | * These get translated to: |
937 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, | |
938 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, | |
488253ce AK |
939 | * HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and |
940 | * HWCAP_S390_ETF3EH bit 8 (22 && 30). | |
cf8ba7a9 MS |
941 | */ |
942 | for (i = 0; i < 6; i++) | |
14375bc4 | 943 | if (test_facility(stfl_bits[i])) |
cf8ba7a9 MS |
944 | elf_hwcap |= 1UL << i; |
945 | ||
14375bc4 | 946 | if (test_facility(22) && test_facility(30)) |
ea2a4d3a | 947 | elf_hwcap |= HWCAP_S390_ETF3EH; |
488253ce | 948 | |
cf8ba7a9 MS |
949 | /* |
950 | * Check for additional facilities with store-facility-list-extended. | |
951 | * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 | |
952 | * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information | |
953 | * as stored by stfl, bits 32-xxx contain additional facilities. | |
954 | * How many facility words are stored depends on the number of | |
25985edc | 955 | * doublewords passed to the instruction. The additional facilities |
cf8ba7a9 | 956 | * are: |
2ac3307f CE |
957 | * Bit 42: decimal floating point facility is installed |
958 | * Bit 44: perform floating point operation facility is installed | |
cf8ba7a9 | 959 | * translated to: |
488253ce | 960 | * HWCAP_S390_DFP bit 6 (42 && 44). |
cf8ba7a9 | 961 | */ |
14375bc4 MS |
962 | if ((elf_hwcap & (1UL << 2)) && test_facility(42) && test_facility(44)) |
963 | elf_hwcap |= HWCAP_S390_DFP; | |
cf8ba7a9 | 964 | |
ea2a4d3a HC |
965 | /* |
966 | * Huge page support HWCAP_S390_HPAGE is bit 7. | |
967 | */ | |
53492b1d | 968 | if (MACHINE_HAS_HPAGE) |
ea2a4d3a HC |
969 | elf_hwcap |= HWCAP_S390_HPAGE; |
970 | ||
971 | /* | |
972 | * 64-bit register support for 31-bit processes | |
973 | * HWCAP_S390_HIGH_GPRS is bit 9. | |
974 | */ | |
975 | elf_hwcap |= HWCAP_S390_HIGH_GPRS; | |
53492b1d | 976 | |
94038a99 MS |
977 | get_cpu_id(&cpu_id); |
978 | switch (cpu_id.machine) { | |
cf8ba7a9 MS |
979 | case 0x9672: |
980 | #if !defined(CONFIG_64BIT) | |
981 | default: /* Use "g5" as default for 31 bit kernels. */ | |
982 | #endif | |
983 | strcpy(elf_platform, "g5"); | |
984 | break; | |
985 | case 0x2064: | |
986 | case 0x2066: | |
987 | #if defined(CONFIG_64BIT) | |
988 | default: /* Use "z900" as default for 64 bit kernels. */ | |
989 | #endif | |
990 | strcpy(elf_platform, "z900"); | |
991 | break; | |
992 | case 0x2084: | |
993 | case 0x2086: | |
994 | strcpy(elf_platform, "z990"); | |
995 | break; | |
996 | case 0x2094: | |
9fee8db2 | 997 | case 0x2096: |
cf8ba7a9 MS |
998 | strcpy(elf_platform, "z9-109"); |
999 | break; | |
9fee8db2 MS |
1000 | case 0x2097: |
1001 | case 0x2098: | |
1002 | strcpy(elf_platform, "z10"); | |
1003 | break; | |
c84b9051 | 1004 | case 0x2817: |
3a81b171 | 1005 | case 0x2818: |
c84b9051 HC |
1006 | strcpy(elf_platform, "z196"); |
1007 | break; | |
cf8ba7a9 MS |
1008 | } |
1009 | } | |
1010 | ||
c9e37353 HC |
1011 | /* |
1012 | * Setup function called from init/main.c just after the banner | |
1013 | * was printed. | |
1014 | */ | |
1da177e4 | 1015 | |
8b646bd7 | 1016 | void __init setup_arch(char **cmdline_p) |
c9e37353 | 1017 | { |
1da177e4 | 1018 | /* |
c9e37353 | 1019 | * print what head.S has found out about the machine |
1da177e4 | 1020 | */ |
347a8dc3 | 1021 | #ifndef CONFIG_64BIT |
3b6ed4ab MS |
1022 | if (MACHINE_IS_VM) |
1023 | pr_info("Linux is running as a z/VM " | |
1024 | "guest operating system in 31-bit mode\n"); | |
27d71602 | 1025 | else if (MACHINE_IS_LPAR) |
3b6ed4ab MS |
1026 | pr_info("Linux is running natively in 31-bit mode\n"); |
1027 | if (MACHINE_HAS_IEEE) | |
1028 | pr_info("The hardware system has IEEE compatible " | |
1029 | "floating point units\n"); | |
1030 | else | |
1031 | pr_info("The hardware system has no IEEE compatible " | |
1032 | "floating point units\n"); | |
347a8dc3 | 1033 | #else /* CONFIG_64BIT */ |
fa587743 | 1034 | if (MACHINE_IS_VM) |
3b6ed4ab MS |
1035 | pr_info("Linux is running as a z/VM " |
1036 | "guest operating system in 64-bit mode\n"); | |
637952ca | 1037 | else if (MACHINE_IS_KVM) |
3b6ed4ab | 1038 | pr_info("Linux is running under KVM in 64-bit mode\n"); |
27d71602 | 1039 | else if (MACHINE_IS_LPAR) |
3b6ed4ab | 1040 | pr_info("Linux is running natively in 64-bit mode\n"); |
347a8dc3 | 1041 | #endif /* CONFIG_64BIT */ |
c9e37353 | 1042 | |
a0443fbb HB |
1043 | /* Have one command line that is parsed and saved in /proc/cmdline */ |
1044 | /* boot_command_line has been already set up in early.c */ | |
1045 | *cmdline_p = boot_command_line; | |
59685296 | 1046 | |
c9e37353 | 1047 | ROOT_DEV = Root_RAM0; |
59685296 HC |
1048 | |
1049 | init_mm.start_code = PAGE_OFFSET; | |
1050 | init_mm.end_code = (unsigned long) &_etext; | |
1051 | init_mm.end_data = (unsigned long) &_edata; | |
1052 | init_mm.brk = (unsigned long) &_end; | |
1053 | ||
6c2a9e6d GS |
1054 | if (MACHINE_HAS_MVCOS) |
1055 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); | |
1056 | else | |
1057 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); | |
1058 | ||
59685296 HC |
1059 | parse_early_param(); |
1060 | ||
4857d4bb | 1061 | os_info_init(); |
99ca4e58 | 1062 | setup_ipl(); |
8b62bc96 | 1063 | setup_memory_end(); |
c1821c2e | 1064 | setup_addressing_mode(); |
60a0c68d MH |
1065 | reserve_oldmem(); |
1066 | reserve_crashkernel(); | |
c9e37353 HC |
1067 | setup_memory(); |
1068 | setup_resources(); | |
d38593f9 | 1069 | setup_vmcoreinfo(); |
c9e37353 HC |
1070 | setup_lowcore(); |
1071 | ||
1da177e4 | 1072 | cpu_init(); |
dbd70fb4 | 1073 | s390_init_cpu_topology(); |
1da177e4 | 1074 | |
cf8ba7a9 MS |
1075 | /* |
1076 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). | |
1077 | */ | |
1078 | setup_hwcaps(); | |
1079 | ||
1da177e4 LT |
1080 | /* |
1081 | * Create kernel page tables and switch to virtual addressing. | |
1082 | */ | |
1083 | paging_init(); | |
1084 | ||
1085 | /* Setup default console */ | |
1086 | conmode_default(); | |
637952ca | 1087 | set_preferred_console(); |
411ed322 MH |
1088 | |
1089 | /* Setup zfcpdump support */ | |
1090 | setup_zfcpdump(console_devno); | |
1da177e4 | 1091 | } |