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> |
cd183459 | 64 | #include <asm/sclp.h> |
8b646bd7 | 65 | #include "entry.h" |
c1821c2e | 66 | |
b50511e4 MS |
67 | long psw_kernel_bits = PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_PRIMARY | |
68 | PSW_MASK_EA | PSW_MASK_BA; | |
69 | long psw_user_bits = PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | | |
70 | PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | | |
71 | PSW_MASK_PSTATE | PSW_ASC_HOME; | |
1da177e4 | 72 | |
d02765d1 GS |
73 | /* |
74 | * User copy operations. | |
75 | */ | |
76 | struct uaccess_ops uaccess; | |
d4ee453b | 77 | EXPORT_SYMBOL(uaccess); |
d02765d1 | 78 | |
1da177e4 LT |
79 | /* |
80 | * Machine setup.. | |
81 | */ | |
82 | unsigned int console_mode = 0; | |
1485c5c8 HC |
83 | EXPORT_SYMBOL(console_mode); |
84 | ||
1da177e4 | 85 | unsigned int console_devno = -1; |
1485c5c8 HC |
86 | EXPORT_SYMBOL(console_devno); |
87 | ||
1da177e4 | 88 | unsigned int console_irq = -1; |
1485c5c8 HC |
89 | EXPORT_SYMBOL(console_irq); |
90 | ||
cf8ba7a9 MS |
91 | unsigned long elf_hwcap = 0; |
92 | char elf_platform[ELF_PLATFORM_SIZE]; | |
36a2bd42 | 93 | |
23d17421 | 94 | struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
23d75d9c HC |
95 | |
96 | int __initdata memory_end_set; | |
97 | unsigned long __initdata memory_end; | |
1da177e4 | 98 | |
14045ebf MS |
99 | unsigned long VMALLOC_START; |
100 | EXPORT_SYMBOL(VMALLOC_START); | |
101 | ||
102 | unsigned long VMALLOC_END; | |
103 | EXPORT_SYMBOL(VMALLOC_END); | |
104 | ||
105 | struct page *vmemmap; | |
106 | EXPORT_SYMBOL(vmemmap); | |
107 | ||
c972cc60 HC |
108 | #ifdef CONFIG_64BIT |
109 | unsigned long MODULES_VADDR; | |
110 | unsigned long MODULES_END; | |
111 | #endif | |
112 | ||
099b7651 FM |
113 | /* An array with a pointer to the lowcore of every CPU. */ |
114 | struct _lowcore *lowcore_ptr[NR_CPUS]; | |
115 | EXPORT_SYMBOL(lowcore_ptr); | |
116 | ||
1da177e4 LT |
117 | /* |
118 | * This is set up by the setup-routine at boot-time | |
119 | * for S390 need to find out, what we have to setup | |
120 | * using address 0x10400 ... | |
121 | */ | |
122 | ||
123 | #include <asm/setup.h> | |
124 | ||
1da177e4 LT |
125 | /* |
126 | * condev= and conmode= setup parameter. | |
127 | */ | |
128 | ||
129 | static int __init condev_setup(char *str) | |
130 | { | |
131 | int vdev; | |
132 | ||
133 | vdev = simple_strtoul(str, &str, 0); | |
134 | if (vdev >= 0 && vdev < 65536) { | |
135 | console_devno = vdev; | |
136 | console_irq = -1; | |
137 | } | |
138 | return 1; | |
139 | } | |
140 | ||
141 | __setup("condev=", condev_setup); | |
142 | ||
637952ca HB |
143 | static void __init set_preferred_console(void) |
144 | { | |
cd183459 HG |
145 | if (MACHINE_IS_KVM) { |
146 | if (sclp_has_vt220()) | |
147 | add_preferred_console("ttyS", 1, NULL); | |
148 | else if (sclp_has_linemode()) | |
149 | add_preferred_console("ttyS", 0, NULL); | |
150 | else | |
151 | add_preferred_console("hvc", 0, NULL); | |
152 | } else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) | |
637952ca | 153 | add_preferred_console("ttyS", 0, NULL); |
c4de0c1a | 154 | else if (CONSOLE_IS_3270) |
637952ca HB |
155 | add_preferred_console("tty3270", 0, NULL); |
156 | } | |
157 | ||
1da177e4 LT |
158 | static int __init conmode_setup(char *str) |
159 | { | |
8c0933ee | 160 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
161 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) |
162 | SET_CONSOLE_SCLP; | |
163 | #endif | |
164 | #if defined(CONFIG_TN3215_CONSOLE) | |
165 | if (strncmp(str, "3215", 5) == 0) | |
166 | SET_CONSOLE_3215; | |
167 | #endif | |
168 | #if defined(CONFIG_TN3270_CONSOLE) | |
169 | if (strncmp(str, "3270", 5) == 0) | |
170 | SET_CONSOLE_3270; | |
171 | #endif | |
637952ca | 172 | set_preferred_console(); |
1da177e4 LT |
173 | return 1; |
174 | } | |
175 | ||
176 | __setup("conmode=", conmode_setup); | |
177 | ||
178 | static void __init conmode_default(void) | |
179 | { | |
180 | char query_buffer[1024]; | |
181 | char *ptr; | |
182 | ||
183 | if (MACHINE_IS_VM) { | |
740b5706 | 184 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
185 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
186 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
187 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
740b5706 | 188 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
189 | ptr = strstr(query_buffer, "CONMODE"); |
190 | /* | |
191 | * Set the conmode to 3215 so that the device recognition | |
192 | * will set the cu_type of the console to 3215. If the | |
193 | * conmode is 3270 and we don't set it back then both | |
194 | * 3215 and the 3270 driver will try to access the console | |
195 | * device (3215 as console and 3270 as normal tty). | |
196 | */ | |
740b5706 | 197 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 | 198 | if (ptr == NULL) { |
8c0933ee | 199 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
200 | SET_CONSOLE_SCLP; |
201 | #endif | |
202 | return; | |
203 | } | |
204 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
205 | #if defined(CONFIG_TN3270_CONSOLE) | |
206 | SET_CONSOLE_3270; | |
207 | #elif defined(CONFIG_TN3215_CONSOLE) | |
208 | SET_CONSOLE_3215; | |
8c0933ee | 209 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
210 | SET_CONSOLE_SCLP; |
211 | #endif | |
212 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
213 | #if defined(CONFIG_TN3215_CONSOLE) | |
214 | SET_CONSOLE_3215; | |
215 | #elif defined(CONFIG_TN3270_CONSOLE) | |
216 | SET_CONSOLE_3270; | |
8c0933ee | 217 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
218 | SET_CONSOLE_SCLP; |
219 | #endif | |
220 | } | |
1da177e4 | 221 | } else { |
8c0933ee | 222 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
223 | SET_CONSOLE_SCLP; |
224 | #endif | |
225 | } | |
226 | } | |
227 | ||
59f2e69d | 228 | #ifdef CONFIG_ZFCPDUMP |
411ed322 MH |
229 | static void __init setup_zfcpdump(unsigned int console_devno) |
230 | { | |
a0443fbb | 231 | static char str[41]; |
411ed322 MH |
232 | |
233 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) | |
234 | return; | |
3f25dc4f MH |
235 | if (OLDMEM_BASE) |
236 | return; | |
411ed322 | 237 | if (console_devno != -1) |
a0443fbb | 238 | sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x", |
411ed322 MH |
239 | ipl_info.data.fcp.dev_id.devno, console_devno); |
240 | else | |
a0443fbb | 241 | sprintf(str, " cio_ignore=all,!0.0.%04x", |
411ed322 | 242 | ipl_info.data.fcp.dev_id.devno); |
a0443fbb | 243 | strcat(boot_command_line, str); |
411ed322 MH |
244 | console_loglevel = 2; |
245 | } | |
246 | #else | |
247 | static inline void setup_zfcpdump(unsigned int console_devno) {} | |
248 | #endif /* CONFIG_ZFCPDUMP */ | |
249 | ||
1da177e4 LT |
250 | /* |
251 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
252 | * _machine_halt or _machine_power_off. | |
253 | */ | |
254 | ||
255 | void machine_restart(char *command) | |
256 | { | |
7aa8dac7 | 257 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
06fa46a2 MS |
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_restart(command); |
264 | } | |
265 | ||
1da177e4 LT |
266 | void machine_halt(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_halt(); |
275 | } | |
276 | ||
1da177e4 LT |
277 | void machine_power_off(void) |
278 | { | |
06fa46a2 MS |
279 | if (!in_interrupt() || oops_in_progress) |
280 | /* | |
281 | * Only unblank the console if we are called in enabled | |
282 | * context or a bust_spinlocks cleared the way for us. | |
283 | */ | |
284 | console_unblank(); | |
1da177e4 LT |
285 | _machine_power_off(); |
286 | } | |
287 | ||
53df751c MS |
288 | /* |
289 | * Dummy power off function. | |
290 | */ | |
291 | void (*pm_power_off)(void) = machine_power_off; | |
292 | ||
59685296 HC |
293 | static int __init early_parse_mem(char *p) |
294 | { | |
295 | memory_end = memparse(p, &p); | |
23d75d9c | 296 | memory_end_set = 1; |
59685296 HC |
297 | return 0; |
298 | } | |
299 | early_param("mem", early_parse_mem); | |
300 | ||
14045ebf MS |
301 | static int __init parse_vmalloc(char *arg) |
302 | { | |
303 | if (!arg) | |
304 | return -EINVAL; | |
305 | VMALLOC_END = (memparse(arg, &arg) + PAGE_SIZE - 1) & PAGE_MASK; | |
306 | return 0; | |
307 | } | |
308 | early_param("vmalloc", parse_vmalloc); | |
309 | ||
d1b0d842 HC |
310 | unsigned int s390_user_mode = PRIMARY_SPACE_MODE; |
311 | EXPORT_SYMBOL_GPL(s390_user_mode); | |
c1821c2e | 312 | |
bad4c9c8 | 313 | static void __init set_user_mode_primary(void) |
c1821c2e | 314 | { |
b50511e4 MS |
315 | psw_kernel_bits = (psw_kernel_bits & ~PSW_MASK_ASC) | PSW_ASC_HOME; |
316 | psw_user_bits = (psw_user_bits & ~PSW_MASK_ASC) | PSW_ASC_PRIMARY; | |
c1821c2e | 317 | #ifdef CONFIG_COMPAT |
b50511e4 MS |
318 | psw32_user_bits = |
319 | (psw32_user_bits & ~PSW32_MASK_ASC) | PSW32_ASC_PRIMARY; | |
c1821c2e | 320 | #endif |
bad4c9c8 | 321 | uaccess = MACHINE_HAS_MVCOS ? uaccess_mvcos_switch : uaccess_pt; |
c1821c2e GS |
322 | } |
323 | ||
b11b5334 | 324 | static int __init early_parse_user_mode(char *p) |
c1821c2e | 325 | { |
b11b5334 | 326 | if (p && strcmp(p, "primary") == 0) |
d1b0d842 | 327 | s390_user_mode = PRIMARY_SPACE_MODE; |
b11b5334 | 328 | else if (!p || strcmp(p, "home") == 0) |
d1b0d842 | 329 | s390_user_mode = HOME_SPACE_MODE; |
b11b5334 MS |
330 | else |
331 | return 1; | |
3b6ed4ab | 332 | return 0; |
c1821c2e | 333 | } |
b11b5334 | 334 | early_param("user_mode", early_parse_user_mode); |
c1821c2e | 335 | |
bad4c9c8 | 336 | static void __init setup_addressing_mode(void) |
c1821c2e | 337 | { |
bad4c9c8 HC |
338 | if (s390_user_mode != PRIMARY_SPACE_MODE) |
339 | return; | |
340 | set_user_mode_primary(); | |
341 | if (MACHINE_HAS_MVCOS) | |
342 | pr_info("Address spaces switched, mvcos available\n"); | |
343 | else | |
344 | pr_info("Address spaces switched, mvcos not available\n"); | |
c1821c2e GS |
345 | } |
346 | ||
8b646bd7 MS |
347 | void *restart_stack __attribute__((__section__(".data"))); |
348 | ||
349 | static void __init setup_lowcore(void) | |
c9e37353 HC |
350 | { |
351 | struct _lowcore *lc; | |
c9e37353 HC |
352 | |
353 | /* | |
354 | * Setup lowcore for boot cpu | |
355 | */ | |
cbb870c8 | 356 | BUILD_BUG_ON(sizeof(struct _lowcore) != LC_PAGES * 4096); |
a0878656 | 357 | lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0); |
b50511e4 | 358 | lc->restart_psw.mask = psw_kernel_bits; |
c9e37353 | 359 | lc->restart_psw.addr = |
8b646bd7 | 360 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; |
b50511e4 MS |
361 | lc->external_new_psw.mask = psw_kernel_bits | |
362 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 HC |
363 | lc->external_new_psw.addr = |
364 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
b50511e4 MS |
365 | lc->svc_new_psw.mask = psw_kernel_bits | |
366 | PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK; | |
c9e37353 | 367 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
b50511e4 MS |
368 | lc->program_new_psw.mask = psw_kernel_bits | |
369 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 | 370 | lc->program_new_psw.addr = |
b50511e4 MS |
371 | PSW_ADDR_AMODE | (unsigned long) pgm_check_handler; |
372 | lc->mcck_new_psw.mask = psw_kernel_bits; | |
c9e37353 HC |
373 | lc->mcck_new_psw.addr = |
374 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
b50511e4 MS |
375 | lc->io_new_psw.mask = psw_kernel_bits | |
376 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 | 377 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
5a62b192 | 378 | lc->clock_comparator = -1ULL; |
c9e37353 HC |
379 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; |
380 | lc->async_stack = (unsigned long) | |
381 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; | |
c9e37353 HC |
382 | lc->panic_stack = (unsigned long) |
383 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; | |
c9e37353 HC |
384 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
385 | lc->thread_info = (unsigned long) &init_thread_union; | |
25097bf1 | 386 | lc->machine_flags = S390_lowcore.machine_flags; |
14375bc4 MS |
387 | lc->stfl_fac_list = S390_lowcore.stfl_fac_list; |
388 | memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, | |
389 | MAX_FACILITY_BIT/8); | |
347a8dc3 | 390 | #ifndef CONFIG_64BIT |
77fa2245 HC |
391 | if (MACHINE_HAS_IEEE) { |
392 | lc->extended_save_area_addr = (__u32) | |
a0878656 | 393 | __alloc_bootmem_low(PAGE_SIZE, PAGE_SIZE, 0); |
77fa2245 | 394 | /* enable extended save area */ |
c4972f33 | 395 | __ctl_set_bit(14, 29); |
77fa2245 | 396 | } |
c742b31c MS |
397 | #else |
398 | lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; | |
77fa2245 | 399 | #endif |
ab96e798 MS |
400 | lc->sync_enter_timer = S390_lowcore.sync_enter_timer; |
401 | lc->async_enter_timer = S390_lowcore.async_enter_timer; | |
402 | lc->exit_timer = S390_lowcore.exit_timer; | |
403 | lc->user_timer = S390_lowcore.user_timer; | |
404 | lc->system_timer = S390_lowcore.system_timer; | |
405 | lc->steal_timer = S390_lowcore.steal_timer; | |
406 | lc->last_update_timer = S390_lowcore.last_update_timer; | |
407 | lc->last_update_clock = S390_lowcore.last_update_clock; | |
dfd9f7ab | 408 | lc->ftrace_func = S390_lowcore.ftrace_func; |
8b646bd7 MS |
409 | |
410 | restart_stack = __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0); | |
411 | restart_stack += ASYNC_SIZE; | |
412 | ||
413 | /* | |
414 | * Set up PSW restart to call ipl.c:do_restart(). Copy the relevant | |
415 | * restart data to the absolute zero lowcore. This is necesary if | |
416 | * PSW restart is done on an offline CPU that has lowcore zero. | |
417 | */ | |
418 | lc->restart_stack = (unsigned long) restart_stack; | |
419 | lc->restart_fn = (unsigned long) do_restart; | |
420 | lc->restart_data = 0; | |
421 | lc->restart_source = -1UL; | |
73bf463e MH |
422 | |
423 | /* Setup absolute zero lowcore */ | |
fbe76568 HC |
424 | mem_assign_absolute(S390_lowcore.restart_stack, lc->restart_stack); |
425 | mem_assign_absolute(S390_lowcore.restart_fn, lc->restart_fn); | |
426 | mem_assign_absolute(S390_lowcore.restart_data, lc->restart_data); | |
427 | mem_assign_absolute(S390_lowcore.restart_source, lc->restart_source); | |
428 | mem_assign_absolute(S390_lowcore.restart_psw, lc->restart_psw); | |
8b646bd7 | 429 | |
c9e37353 | 430 | set_prefix((u32)(unsigned long) lc); |
099b7651 | 431 | lowcore_ptr[0] = lc; |
c9e37353 HC |
432 | } |
433 | ||
71189284 HC |
434 | static struct resource code_resource = { |
435 | .name = "Kernel code", | |
436 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
437 | }; | |
438 | ||
439 | static struct resource data_resource = { | |
440 | .name = "Kernel data", | |
441 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
442 | }; | |
443 | ||
4cc69531 HC |
444 | static struct resource bss_resource = { |
445 | .name = "Kernel bss", | |
446 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
447 | }; | |
448 | ||
71189284 HC |
449 | static struct resource __initdata *standard_resources[] = { |
450 | &code_resource, | |
451 | &data_resource, | |
4cc69531 | 452 | &bss_resource, |
71189284 HC |
453 | }; |
454 | ||
455 | static void __init setup_resources(void) | |
c9e37353 | 456 | { |
71189284 HC |
457 | struct resource *res, *std_res, *sub_res; |
458 | int i, j; | |
c9e37353 | 459 | |
cc13ad62 HC |
460 | code_resource.start = (unsigned long) &_text; |
461 | code_resource.end = (unsigned long) &_etext - 1; | |
462 | data_resource.start = (unsigned long) &_etext; | |
463 | data_resource.end = (unsigned long) &_edata - 1; | |
4cc69531 HC |
464 | bss_resource.start = (unsigned long) &__bss_start; |
465 | bss_resource.end = (unsigned long) &__bss_stop - 1; | |
cc13ad62 | 466 | |
9f4b0ba8 HC |
467 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
468 | if (!memory_chunk[i].size) | |
469 | continue; | |
60a0c68d MH |
470 | if (memory_chunk[i].type == CHUNK_OLDMEM || |
471 | memory_chunk[i].type == CHUNK_CRASHK) | |
472 | continue; | |
71189284 | 473 | res = alloc_bootmem_low(sizeof(*res)); |
c9e37353 HC |
474 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; |
475 | switch (memory_chunk[i].type) { | |
476 | case CHUNK_READ_WRITE: | |
dab7a7b1 | 477 | case CHUNK_CRASHK: |
c9e37353 HC |
478 | res->name = "System RAM"; |
479 | break; | |
480 | case CHUNK_READ_ONLY: | |
481 | res->name = "System ROM"; | |
482 | res->flags |= IORESOURCE_READONLY; | |
483 | break; | |
484 | default: | |
485 | res->name = "reserved"; | |
486 | } | |
487 | res->start = memory_chunk[i].addr; | |
71189284 | 488 | res->end = res->start + memory_chunk[i].size - 1; |
c9e37353 | 489 | request_resource(&iomem_resource, res); |
fe355b7f | 490 | |
71189284 HC |
491 | for (j = 0; j < ARRAY_SIZE(standard_resources); j++) { |
492 | std_res = standard_resources[j]; | |
493 | if (std_res->start < res->start || | |
494 | std_res->start > res->end) | |
495 | continue; | |
496 | if (std_res->end > res->end) { | |
497 | sub_res = alloc_bootmem_low(sizeof(*sub_res)); | |
498 | *sub_res = *std_res; | |
499 | sub_res->end = res->end; | |
500 | std_res->start = res->end + 1; | |
501 | request_resource(res, sub_res); | |
502 | } else { | |
503 | request_resource(res, std_res); | |
504 | } | |
fe355b7f | 505 | } |
c9e37353 HC |
506 | } |
507 | } | |
508 | ||
411ed322 MH |
509 | unsigned long real_memory_size; |
510 | EXPORT_SYMBOL_GPL(real_memory_size); | |
511 | ||
8b62bc96 HC |
512 | static void __init setup_memory_end(void) |
513 | { | |
14045ebf | 514 | unsigned long vmax, vmalloc_size, tmp; |
8b62bc96 HC |
515 | int i; |
516 | ||
60a0c68d | 517 | |
59f2e69d | 518 | #ifdef CONFIG_ZFCPDUMP |
3f25dc4f | 519 | if (ipl_info.type == IPL_TYPE_FCP_DUMP && !OLDMEM_BASE) { |
411ed322 | 520 | memory_end = ZFCPDUMP_HSA_SIZE; |
23d75d9c HC |
521 | memory_end_set = 1; |
522 | } | |
411ed322 | 523 | #endif |
14045ebf | 524 | real_memory_size = 0; |
8b62bc96 HC |
525 | memory_end &= PAGE_MASK; |
526 | ||
9f4b0ba8 HC |
527 | /* |
528 | * Make sure all chunks are MAX_ORDER aligned so we don't need the | |
529 | * extra checks that HOLES_IN_ZONE would require. | |
530 | */ | |
531 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
532 | unsigned long start, end; | |
533 | struct mem_chunk *chunk; | |
534 | unsigned long align; | |
535 | ||
536 | chunk = &memory_chunk[i]; | |
537 | align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); | |
538 | start = (chunk->addr + align - 1) & ~(align - 1); | |
539 | end = (chunk->addr + chunk->size) & ~(align - 1); | |
540 | if (start >= end) | |
541 | memset(chunk, 0, sizeof(*chunk)); | |
542 | else { | |
543 | chunk->addr = start; | |
544 | chunk->size = end - start; | |
545 | } | |
14045ebf MS |
546 | real_memory_size = max(real_memory_size, |
547 | chunk->addr + chunk->size); | |
9f4b0ba8 HC |
548 | } |
549 | ||
14045ebf MS |
550 | /* Choose kernel address space layout: 2, 3, or 4 levels. */ |
551 | #ifdef CONFIG_64BIT | |
c972cc60 | 552 | vmalloc_size = VMALLOC_END ?: (128UL << 30) - MODULES_LEN; |
14045ebf MS |
553 | tmp = (memory_end ?: real_memory_size) / PAGE_SIZE; |
554 | tmp = tmp * (sizeof(struct page) + PAGE_SIZE) + vmalloc_size; | |
555 | if (tmp <= (1UL << 42)) | |
556 | vmax = 1UL << 42; /* 3-level kernel page table */ | |
557 | else | |
558 | vmax = 1UL << 53; /* 4-level kernel page table */ | |
c972cc60 HC |
559 | /* module area is at the end of the kernel address space. */ |
560 | MODULES_END = vmax; | |
561 | MODULES_VADDR = MODULES_END - MODULES_LEN; | |
562 | VMALLOC_END = MODULES_VADDR; | |
14045ebf MS |
563 | #else |
564 | vmalloc_size = VMALLOC_END ?: 96UL << 20; | |
565 | vmax = 1UL << 31; /* 2-level kernel page table */ | |
14045ebf MS |
566 | /* vmalloc area is at the end of the kernel address space. */ |
567 | VMALLOC_END = vmax; | |
c972cc60 | 568 | #endif |
14045ebf MS |
569 | VMALLOC_START = vmax - vmalloc_size; |
570 | ||
571 | /* Split remaining virtual space between 1:1 mapping & vmemmap array */ | |
572 | tmp = VMALLOC_START / (PAGE_SIZE + sizeof(struct page)); | |
573 | tmp = VMALLOC_START - tmp * sizeof(struct page); | |
574 | tmp &= ~((vmax >> 11) - 1); /* align to page table level */ | |
575 | tmp = min(tmp, 1UL << MAX_PHYSMEM_BITS); | |
576 | vmemmap = (struct page *) tmp; | |
577 | ||
578 | /* Take care that memory_end is set and <= vmemmap */ | |
579 | memory_end = min(memory_end ?: real_memory_size, tmp); | |
580 | ||
581 | /* Fixup memory chunk array to fit into 0..memory_end */ | |
8b62bc96 HC |
582 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
583 | struct mem_chunk *chunk = &memory_chunk[i]; | |
584 | ||
14045ebf | 585 | if (chunk->addr >= memory_end) { |
8b62bc96 HC |
586 | memset(chunk, 0, sizeof(*chunk)); |
587 | continue; | |
588 | } | |
14045ebf MS |
589 | if (chunk->addr + chunk->size > memory_end) |
590 | chunk->size = memory_end - chunk->addr; | |
8b62bc96 | 591 | } |
8b62bc96 HC |
592 | } |
593 | ||
d38593f9 MH |
594 | static void __init setup_vmcoreinfo(void) |
595 | { | |
fbe76568 | 596 | mem_assign_absolute(S390_lowcore.vmcore_info, paddr_vmcoreinfo_note()); |
d38593f9 MH |
597 | } |
598 | ||
60a0c68d MH |
599 | #ifdef CONFIG_CRASH_DUMP |
600 | ||
601 | /* | |
602 | * Find suitable location for crashkernel memory | |
603 | */ | |
604 | static unsigned long __init find_crash_base(unsigned long crash_size, | |
605 | char **msg) | |
606 | { | |
607 | unsigned long crash_base; | |
608 | struct mem_chunk *chunk; | |
609 | int i; | |
610 | ||
611 | if (memory_chunk[0].size < crash_size) { | |
612 | *msg = "first memory chunk must be at least crashkernel size"; | |
613 | return 0; | |
614 | } | |
5f894cbb | 615 | if (OLDMEM_BASE && crash_size == OLDMEM_SIZE) |
60a0c68d MH |
616 | return OLDMEM_BASE; |
617 | ||
618 | for (i = MEMORY_CHUNKS - 1; i >= 0; i--) { | |
619 | chunk = &memory_chunk[i]; | |
620 | if (chunk->size == 0) | |
621 | continue; | |
622 | if (chunk->type != CHUNK_READ_WRITE) | |
623 | continue; | |
624 | if (chunk->size < crash_size) | |
625 | continue; | |
626 | crash_base = (chunk->addr + chunk->size) - crash_size; | |
627 | if (crash_base < crash_size) | |
628 | continue; | |
629 | if (crash_base < ZFCPDUMP_HSA_SIZE_MAX) | |
630 | continue; | |
631 | if (crash_base < (unsigned long) INITRD_START + INITRD_SIZE) | |
632 | continue; | |
633 | return crash_base; | |
634 | } | |
635 | *msg = "no suitable area found"; | |
636 | return 0; | |
637 | } | |
638 | ||
639 | /* | |
640 | * Check if crash_base and crash_size is valid | |
641 | */ | |
642 | static int __init verify_crash_base(unsigned long crash_base, | |
643 | unsigned long crash_size, | |
644 | char **msg) | |
645 | { | |
646 | struct mem_chunk *chunk; | |
647 | int i; | |
648 | ||
649 | /* | |
650 | * Because we do the swap to zero, we must have at least 'crash_size' | |
651 | * bytes free space before crash_base | |
652 | */ | |
653 | if (crash_size > crash_base) { | |
654 | *msg = "crashkernel offset must be greater than size"; | |
655 | return -EINVAL; | |
656 | } | |
657 | ||
658 | /* First memory chunk must be at least crash_size */ | |
659 | if (memory_chunk[0].size < crash_size) { | |
660 | *msg = "first memory chunk must be at least crashkernel size"; | |
661 | return -EINVAL; | |
662 | } | |
663 | /* Check if we fit into the respective memory chunk */ | |
664 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
665 | chunk = &memory_chunk[i]; | |
666 | if (chunk->size == 0) | |
667 | continue; | |
668 | if (crash_base < chunk->addr) | |
669 | continue; | |
670 | if (crash_base >= chunk->addr + chunk->size) | |
671 | continue; | |
672 | /* we have found the memory chunk */ | |
673 | if (crash_base + crash_size > chunk->addr + chunk->size) { | |
674 | *msg = "selected memory chunk is too small for " | |
675 | "crashkernel memory"; | |
676 | return -EINVAL; | |
677 | } | |
678 | return 0; | |
679 | } | |
680 | *msg = "invalid memory range specified"; | |
681 | return -EINVAL; | |
682 | } | |
683 | ||
684 | /* | |
685 | * Reserve kdump memory by creating a memory hole in the mem_chunk array | |
686 | */ | |
687 | static void __init reserve_kdump_bootmem(unsigned long addr, unsigned long size, | |
688 | int type) | |
689 | { | |
60a0c68d MH |
690 | create_mem_hole(memory_chunk, addr, size, type); |
691 | } | |
692 | ||
693 | /* | |
694 | * When kdump is enabled, we have to ensure that no memory from | |
695 | * the area [0 - crashkernel memory size] and | |
696 | * [crashk_res.start - crashk_res.end] is set offline. | |
697 | */ | |
698 | static int kdump_mem_notifier(struct notifier_block *nb, | |
699 | unsigned long action, void *data) | |
700 | { | |
701 | struct memory_notify *arg = data; | |
702 | ||
703 | if (arg->start_pfn < PFN_DOWN(resource_size(&crashk_res))) | |
704 | return NOTIFY_BAD; | |
705 | if (arg->start_pfn > PFN_DOWN(crashk_res.end)) | |
706 | return NOTIFY_OK; | |
707 | if (arg->start_pfn + arg->nr_pages - 1 < PFN_DOWN(crashk_res.start)) | |
708 | return NOTIFY_OK; | |
709 | return NOTIFY_BAD; | |
710 | } | |
711 | ||
712 | static struct notifier_block kdump_mem_nb = { | |
713 | .notifier_call = kdump_mem_notifier, | |
714 | }; | |
715 | ||
716 | #endif | |
717 | ||
718 | /* | |
719 | * Make sure that oldmem, where the dump is stored, is protected | |
720 | */ | |
721 | static void reserve_oldmem(void) | |
722 | { | |
723 | #ifdef CONFIG_CRASH_DUMP | |
724 | if (!OLDMEM_BASE) | |
725 | return; | |
726 | ||
727 | reserve_kdump_bootmem(OLDMEM_BASE, OLDMEM_SIZE, CHUNK_OLDMEM); | |
728 | reserve_kdump_bootmem(OLDMEM_SIZE, memory_end - OLDMEM_SIZE, | |
729 | CHUNK_OLDMEM); | |
730 | if (OLDMEM_BASE + OLDMEM_SIZE == real_memory_size) | |
731 | saved_max_pfn = PFN_DOWN(OLDMEM_BASE) - 1; | |
732 | else | |
733 | saved_max_pfn = PFN_DOWN(real_memory_size) - 1; | |
734 | #endif | |
735 | } | |
736 | ||
737 | /* | |
738 | * Reserve memory for kdump kernel to be loaded with kexec | |
739 | */ | |
740 | static void __init reserve_crashkernel(void) | |
741 | { | |
742 | #ifdef CONFIG_CRASH_DUMP | |
743 | unsigned long long crash_base, crash_size; | |
4fdf7f43 | 744 | char *msg = NULL; |
60a0c68d MH |
745 | int rc; |
746 | ||
747 | rc = parse_crashkernel(boot_command_line, memory_end, &crash_size, | |
748 | &crash_base); | |
749 | if (rc || crash_size == 0) | |
750 | return; | |
dab7a7b1 MH |
751 | crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN); |
752 | crash_size = ALIGN(crash_size, KEXEC_CRASH_MEM_ALIGN); | |
60a0c68d MH |
753 | if (register_memory_notifier(&kdump_mem_nb)) |
754 | return; | |
755 | if (!crash_base) | |
756 | crash_base = find_crash_base(crash_size, &msg); | |
757 | if (!crash_base) { | |
758 | pr_info("crashkernel reservation failed: %s\n", msg); | |
759 | unregister_memory_notifier(&kdump_mem_nb); | |
760 | return; | |
761 | } | |
762 | if (verify_crash_base(crash_base, crash_size, &msg)) { | |
763 | pr_info("crashkernel reservation failed: %s\n", msg); | |
764 | unregister_memory_notifier(&kdump_mem_nb); | |
765 | return; | |
766 | } | |
767 | if (!OLDMEM_BASE && MACHINE_IS_VM) | |
768 | diag10_range(PFN_DOWN(crash_base), PFN_DOWN(crash_size)); | |
769 | crashk_res.start = crash_base; | |
770 | crashk_res.end = crash_base + crash_size - 1; | |
771 | insert_resource(&iomem_resource, &crashk_res); | |
dab7a7b1 | 772 | reserve_kdump_bootmem(crash_base, crash_size, CHUNK_CRASHK); |
60a0c68d MH |
773 | pr_info("Reserving %lluMB of memory at %lluMB " |
774 | "for crashkernel (System RAM: %luMB)\n", | |
775 | crash_size >> 20, crash_base >> 20, memory_end >> 20); | |
4857d4bb | 776 | os_info_crashkernel_add(crash_base, crash_size); |
60a0c68d MH |
777 | #endif |
778 | } | |
779 | ||
8b646bd7 | 780 | static void __init setup_memory(void) |
c9e37353 HC |
781 | { |
782 | unsigned long bootmap_size; | |
fe355b7f | 783 | unsigned long start_pfn, end_pfn; |
c9e37353 | 784 | int i; |
1da177e4 LT |
785 | |
786 | /* | |
787 | * partially used pages are not usable - thus | |
788 | * we are rounding upwards: | |
789 | */ | |
65912a84 HC |
790 | start_pfn = PFN_UP(__pa(&_end)); |
791 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 792 | |
65912a84 HC |
793 | #ifdef CONFIG_BLK_DEV_INITRD |
794 | /* | |
795 | * Move the initrd in case the bitmap of the bootmem allocater | |
796 | * would overwrite it. | |
797 | */ | |
798 | ||
799 | if (INITRD_START && INITRD_SIZE) { | |
800 | unsigned long bmap_size; | |
801 | unsigned long start; | |
802 | ||
803 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
804 | bmap_size = PFN_PHYS(bmap_size); | |
805 | ||
806 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
807 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
808 | ||
60a0c68d MH |
809 | #ifdef CONFIG_CRASH_DUMP |
810 | if (OLDMEM_BASE) { | |
811 | /* Move initrd behind kdump oldmem */ | |
812 | if (start + INITRD_SIZE > OLDMEM_BASE && | |
813 | start < OLDMEM_BASE + OLDMEM_SIZE) | |
814 | start = OLDMEM_BASE + OLDMEM_SIZE; | |
815 | } | |
816 | #endif | |
65912a84 | 817 | if (start + INITRD_SIZE > memory_end) { |
3b6ed4ab MS |
818 | pr_err("initrd extends beyond end of " |
819 | "memory (0x%08lx > 0x%08lx) " | |
65912a84 HC |
820 | "disabling initrd\n", |
821 | start + INITRD_SIZE, memory_end); | |
822 | INITRD_START = INITRD_SIZE = 0; | |
823 | } else { | |
3b6ed4ab MS |
824 | pr_info("Moving initrd (0x%08lx -> " |
825 | "0x%08lx, size: %ld)\n", | |
826 | INITRD_START, start, INITRD_SIZE); | |
65912a84 HC |
827 | memmove((void *) start, (void *) INITRD_START, |
828 | INITRD_SIZE); | |
829 | INITRD_START = start; | |
830 | } | |
831 | } | |
832 | } | |
833 | #endif | |
834 | ||
1da177e4 | 835 | /* |
7676bef9 | 836 | * Initialize the boot-time allocator |
1da177e4 LT |
837 | */ |
838 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
839 | ||
840 | /* | |
841 | * Register RAM areas with the bootmem allocator. | |
842 | */ | |
c9e37353 | 843 | |
0b642ede | 844 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
39b742f9 | 845 | unsigned long start_chunk, end_chunk, pfn; |
1da177e4 | 846 | |
dab7a7b1 MH |
847 | if (memory_chunk[i].type != CHUNK_READ_WRITE && |
848 | memory_chunk[i].type != CHUNK_CRASHK) | |
1da177e4 | 849 | continue; |
39b742f9 | 850 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
fb2e7c5e | 851 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |
39b742f9 HC |
852 | end_chunk = min(end_chunk, end_pfn); |
853 | if (start_chunk >= end_chunk) | |
854 | continue; | |
ff38df37 TH |
855 | memblock_add_node(PFN_PHYS(start_chunk), |
856 | PFN_PHYS(end_chunk - start_chunk), 0); | |
39b742f9 | 857 | pfn = max(start_chunk, start_pfn); |
6b70a920 | 858 | storage_key_init_range(PFN_PHYS(pfn), PFN_PHYS(end_chunk)); |
1da177e4 LT |
859 | } |
860 | ||
0b642ede PO |
861 | psw_set_key(PAGE_DEFAULT_KEY); |
862 | ||
39b742f9 | 863 | free_bootmem_with_active_regions(0, max_pfn); |
c9e37353 | 864 | |
615b04b3 HC |
865 | /* |
866 | * Reserve memory used for lowcore/command line/kernel image. | |
867 | */ | |
72a7fe39 | 868 | reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
615b04b3 | 869 | reserve_bootmem((unsigned long)_stext, |
72a7fe39 BW |
870 | PFN_PHYS(start_pfn) - (unsigned long)_stext, |
871 | BOOTMEM_DEFAULT); | |
c9e37353 HC |
872 | /* |
873 | * Reserve the bootmem bitmap itself as well. We do this in two | |
874 | * steps (first step was init_bootmem()) because this catches | |
875 | * the (very unlikely) case of us accidentally initializing the | |
876 | * bootmem allocator with an invalid RAM area. | |
877 | */ | |
72a7fe39 BW |
878 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, |
879 | BOOTMEM_DEFAULT); | |
1da177e4 | 880 | |
60a0c68d MH |
881 | #ifdef CONFIG_CRASH_DUMP |
882 | if (crashk_res.start) | |
883 | reserve_bootmem(crashk_res.start, | |
884 | crashk_res.end - crashk_res.start + 1, | |
885 | BOOTMEM_DEFAULT); | |
886 | if (is_kdump_kernel()) | |
887 | reserve_bootmem(elfcorehdr_addr - OLDMEM_BASE, | |
888 | PAGE_ALIGN(elfcorehdr_size), BOOTMEM_DEFAULT); | |
889 | #endif | |
1da177e4 | 890 | #ifdef CONFIG_BLK_DEV_INITRD |
65912a84 | 891 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 | 892 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
72a7fe39 BW |
893 | reserve_bootmem(INITRD_START, INITRD_SIZE, |
894 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
895 | initrd_start = INITRD_START; |
896 | initrd_end = initrd_start + INITRD_SIZE; | |
897 | } else { | |
3b6ed4ab MS |
898 | pr_err("initrd extends beyond end of " |
899 | "memory (0x%08lx > 0x%08lx) " | |
900 | "disabling initrd\n", | |
c9e37353 HC |
901 | initrd_start + INITRD_SIZE, memory_end); |
902 | initrd_start = initrd_end = 0; | |
1da177e4 | 903 | } |
c9e37353 | 904 | } |
1da177e4 | 905 | #endif |
c9e37353 | 906 | } |
1da177e4 | 907 | |
cf8ba7a9 MS |
908 | /* |
909 | * Setup hardware capabilities. | |
910 | */ | |
911 | static void __init setup_hwcaps(void) | |
912 | { | |
913 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; | |
94038a99 | 914 | struct cpuid cpu_id; |
cf8ba7a9 MS |
915 | int i; |
916 | ||
cf8ba7a9 MS |
917 | /* |
918 | * The store facility list bits numbers as found in the principles | |
919 | * of operation are numbered with bit 1UL<<31 as number 0 to | |
920 | * bit 1UL<<0 as number 31. | |
921 | * Bit 0: instructions named N3, "backported" to esa-mode | |
922 | * Bit 2: z/Architecture mode is active | |
923 | * Bit 7: the store-facility-list-extended facility is installed | |
924 | * Bit 17: the message-security assist is installed | |
925 | * Bit 19: the long-displacement facility is installed | |
926 | * Bit 21: the extended-immediate facility is installed | |
488253ce AK |
927 | * Bit 22: extended-translation facility 3 is installed |
928 | * Bit 30: extended-translation facility 3 enhancement facility | |
cf8ba7a9 MS |
929 | * These get translated to: |
930 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, | |
931 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, | |
488253ce AK |
932 | * HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and |
933 | * HWCAP_S390_ETF3EH bit 8 (22 && 30). | |
cf8ba7a9 MS |
934 | */ |
935 | for (i = 0; i < 6; i++) | |
14375bc4 | 936 | if (test_facility(stfl_bits[i])) |
cf8ba7a9 MS |
937 | elf_hwcap |= 1UL << i; |
938 | ||
14375bc4 | 939 | if (test_facility(22) && test_facility(30)) |
ea2a4d3a | 940 | elf_hwcap |= HWCAP_S390_ETF3EH; |
488253ce | 941 | |
cf8ba7a9 MS |
942 | /* |
943 | * Check for additional facilities with store-facility-list-extended. | |
944 | * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 | |
945 | * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information | |
946 | * as stored by stfl, bits 32-xxx contain additional facilities. | |
947 | * How many facility words are stored depends on the number of | |
25985edc | 948 | * doublewords passed to the instruction. The additional facilities |
cf8ba7a9 | 949 | * are: |
2ac3307f CE |
950 | * Bit 42: decimal floating point facility is installed |
951 | * Bit 44: perform floating point operation facility is installed | |
cf8ba7a9 | 952 | * translated to: |
488253ce | 953 | * HWCAP_S390_DFP bit 6 (42 && 44). |
cf8ba7a9 | 954 | */ |
14375bc4 MS |
955 | if ((elf_hwcap & (1UL << 2)) && test_facility(42) && test_facility(44)) |
956 | elf_hwcap |= HWCAP_S390_DFP; | |
cf8ba7a9 | 957 | |
ea2a4d3a HC |
958 | /* |
959 | * Huge page support HWCAP_S390_HPAGE is bit 7. | |
960 | */ | |
53492b1d | 961 | if (MACHINE_HAS_HPAGE) |
ea2a4d3a HC |
962 | elf_hwcap |= HWCAP_S390_HPAGE; |
963 | ||
db2e1f43 | 964 | #if defined(CONFIG_64BIT) |
ea2a4d3a HC |
965 | /* |
966 | * 64-bit register support for 31-bit processes | |
967 | * HWCAP_S390_HIGH_GPRS is bit 9. | |
968 | */ | |
969 | elf_hwcap |= HWCAP_S390_HIGH_GPRS; | |
d35339a4 MS |
970 | |
971 | /* | |
972 | * Transactional execution support HWCAP_S390_TE is bit 10. | |
973 | */ | |
974 | if (test_facility(50) && test_facility(73)) | |
975 | elf_hwcap |= HWCAP_S390_TE; | |
db2e1f43 | 976 | #endif |
53492b1d | 977 | |
94038a99 MS |
978 | get_cpu_id(&cpu_id); |
979 | switch (cpu_id.machine) { | |
cf8ba7a9 MS |
980 | case 0x9672: |
981 | #if !defined(CONFIG_64BIT) | |
982 | default: /* Use "g5" as default for 31 bit kernels. */ | |
983 | #endif | |
984 | strcpy(elf_platform, "g5"); | |
985 | break; | |
986 | case 0x2064: | |
987 | case 0x2066: | |
988 | #if defined(CONFIG_64BIT) | |
989 | default: /* Use "z900" as default for 64 bit kernels. */ | |
990 | #endif | |
991 | strcpy(elf_platform, "z900"); | |
992 | break; | |
993 | case 0x2084: | |
994 | case 0x2086: | |
995 | strcpy(elf_platform, "z990"); | |
996 | break; | |
997 | case 0x2094: | |
9fee8db2 | 998 | case 0x2096: |
cf8ba7a9 MS |
999 | strcpy(elf_platform, "z9-109"); |
1000 | break; | |
9fee8db2 MS |
1001 | case 0x2097: |
1002 | case 0x2098: | |
1003 | strcpy(elf_platform, "z10"); | |
1004 | break; | |
c84b9051 | 1005 | case 0x2817: |
3a81b171 | 1006 | case 0x2818: |
c84b9051 HC |
1007 | strcpy(elf_platform, "z196"); |
1008 | break; | |
991c1505 HC |
1009 | case 0x2827: |
1010 | strcpy(elf_platform, "zEC12"); | |
1011 | break; | |
cf8ba7a9 MS |
1012 | } |
1013 | } | |
1014 | ||
c9e37353 HC |
1015 | /* |
1016 | * Setup function called from init/main.c just after the banner | |
1017 | * was printed. | |
1018 | */ | |
1da177e4 | 1019 | |
8b646bd7 | 1020 | void __init setup_arch(char **cmdline_p) |
c9e37353 | 1021 | { |
1da177e4 | 1022 | /* |
c9e37353 | 1023 | * print what head.S has found out about the machine |
1da177e4 | 1024 | */ |
347a8dc3 | 1025 | #ifndef CONFIG_64BIT |
3b6ed4ab MS |
1026 | if (MACHINE_IS_VM) |
1027 | pr_info("Linux is running as a z/VM " | |
1028 | "guest operating system in 31-bit mode\n"); | |
27d71602 | 1029 | else if (MACHINE_IS_LPAR) |
3b6ed4ab MS |
1030 | pr_info("Linux is running natively in 31-bit mode\n"); |
1031 | if (MACHINE_HAS_IEEE) | |
1032 | pr_info("The hardware system has IEEE compatible " | |
1033 | "floating point units\n"); | |
1034 | else | |
1035 | pr_info("The hardware system has no IEEE compatible " | |
1036 | "floating point units\n"); | |
347a8dc3 | 1037 | #else /* CONFIG_64BIT */ |
fa587743 | 1038 | if (MACHINE_IS_VM) |
3b6ed4ab MS |
1039 | pr_info("Linux is running as a z/VM " |
1040 | "guest operating system in 64-bit mode\n"); | |
637952ca | 1041 | else if (MACHINE_IS_KVM) |
3b6ed4ab | 1042 | pr_info("Linux is running under KVM in 64-bit mode\n"); |
27d71602 | 1043 | else if (MACHINE_IS_LPAR) |
3b6ed4ab | 1044 | pr_info("Linux is running natively in 64-bit mode\n"); |
347a8dc3 | 1045 | #endif /* CONFIG_64BIT */ |
c9e37353 | 1046 | |
a0443fbb HB |
1047 | /* Have one command line that is parsed and saved in /proc/cmdline */ |
1048 | /* boot_command_line has been already set up in early.c */ | |
1049 | *cmdline_p = boot_command_line; | |
59685296 | 1050 | |
c9e37353 | 1051 | ROOT_DEV = Root_RAM0; |
59685296 HC |
1052 | |
1053 | init_mm.start_code = PAGE_OFFSET; | |
1054 | init_mm.end_code = (unsigned long) &_etext; | |
1055 | init_mm.end_data = (unsigned long) &_edata; | |
1056 | init_mm.brk = (unsigned long) &_end; | |
1057 | ||
6c2a9e6d GS |
1058 | if (MACHINE_HAS_MVCOS) |
1059 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); | |
1060 | else | |
1061 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); | |
1062 | ||
59685296 HC |
1063 | parse_early_param(); |
1064 | ||
4857d4bb | 1065 | os_info_init(); |
99ca4e58 | 1066 | setup_ipl(); |
8b62bc96 | 1067 | setup_memory_end(); |
c1821c2e | 1068 | setup_addressing_mode(); |
60a0c68d MH |
1069 | reserve_oldmem(); |
1070 | reserve_crashkernel(); | |
c9e37353 HC |
1071 | setup_memory(); |
1072 | setup_resources(); | |
d38593f9 | 1073 | setup_vmcoreinfo(); |
c9e37353 HC |
1074 | setup_lowcore(); |
1075 | ||
1da177e4 | 1076 | cpu_init(); |
dbd70fb4 | 1077 | s390_init_cpu_topology(); |
1da177e4 | 1078 | |
cf8ba7a9 MS |
1079 | /* |
1080 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). | |
1081 | */ | |
1082 | setup_hwcaps(); | |
1083 | ||
1da177e4 LT |
1084 | /* |
1085 | * Create kernel page tables and switch to virtual addressing. | |
1086 | */ | |
1087 | paging_init(); | |
1088 | ||
1089 | /* Setup default console */ | |
1090 | conmode_default(); | |
637952ca | 1091 | set_preferred_console(); |
411ed322 MH |
1092 | |
1093 | /* Setup zfcpdump support */ | |
1094 | setup_zfcpdump(console_devno); | |
1da177e4 | 1095 | } |