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 | 18 | #include <linux/errno.h> |
0872922f | 19 | #include <linux/export.h> |
1da177e4 LT |
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 |
fe72ffba | 229 | static void __init setup_zfcpdump(void) |
411ed322 | 230 | { |
411ed322 MH |
231 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) |
232 | return; | |
3f25dc4f MH |
233 | if (OLDMEM_BASE) |
234 | return; | |
fe72ffba | 235 | strcat(boot_command_line, " cio_ignore=all,!ipldev,!condev"); |
411ed322 MH |
236 | console_loglevel = 2; |
237 | } | |
238 | #else | |
fe72ffba | 239 | static inline void setup_zfcpdump(void) {} |
411ed322 MH |
240 | #endif /* CONFIG_ZFCPDUMP */ |
241 | ||
1da177e4 LT |
242 | /* |
243 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
244 | * _machine_halt or _machine_power_off. | |
245 | */ | |
246 | ||
247 | void machine_restart(char *command) | |
248 | { | |
7aa8dac7 | 249 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
06fa46a2 MS |
250 | /* |
251 | * Only unblank the console if we are called in enabled | |
252 | * context or a bust_spinlocks cleared the way for us. | |
253 | */ | |
254 | console_unblank(); | |
1da177e4 LT |
255 | _machine_restart(command); |
256 | } | |
257 | ||
1da177e4 LT |
258 | void machine_halt(void) |
259 | { | |
06fa46a2 MS |
260 | if (!in_interrupt() || oops_in_progress) |
261 | /* | |
262 | * Only unblank the console if we are called in enabled | |
263 | * context or a bust_spinlocks cleared the way for us. | |
264 | */ | |
265 | console_unblank(); | |
1da177e4 LT |
266 | _machine_halt(); |
267 | } | |
268 | ||
1da177e4 LT |
269 | void machine_power_off(void) |
270 | { | |
06fa46a2 MS |
271 | if (!in_interrupt() || oops_in_progress) |
272 | /* | |
273 | * Only unblank the console if we are called in enabled | |
274 | * context or a bust_spinlocks cleared the way for us. | |
275 | */ | |
276 | console_unblank(); | |
1da177e4 LT |
277 | _machine_power_off(); |
278 | } | |
279 | ||
53df751c MS |
280 | /* |
281 | * Dummy power off function. | |
282 | */ | |
283 | void (*pm_power_off)(void) = machine_power_off; | |
0872922f | 284 | EXPORT_SYMBOL_GPL(pm_power_off); |
53df751c | 285 | |
59685296 HC |
286 | static int __init early_parse_mem(char *p) |
287 | { | |
288 | memory_end = memparse(p, &p); | |
23d75d9c | 289 | memory_end_set = 1; |
59685296 HC |
290 | return 0; |
291 | } | |
292 | early_param("mem", early_parse_mem); | |
293 | ||
14045ebf MS |
294 | static int __init parse_vmalloc(char *arg) |
295 | { | |
296 | if (!arg) | |
297 | return -EINVAL; | |
298 | VMALLOC_END = (memparse(arg, &arg) + PAGE_SIZE - 1) & PAGE_MASK; | |
299 | return 0; | |
300 | } | |
301 | early_param("vmalloc", parse_vmalloc); | |
302 | ||
d1b0d842 HC |
303 | unsigned int s390_user_mode = PRIMARY_SPACE_MODE; |
304 | EXPORT_SYMBOL_GPL(s390_user_mode); | |
c1821c2e | 305 | |
bad4c9c8 | 306 | static void __init set_user_mode_primary(void) |
c1821c2e | 307 | { |
b50511e4 MS |
308 | psw_kernel_bits = (psw_kernel_bits & ~PSW_MASK_ASC) | PSW_ASC_HOME; |
309 | psw_user_bits = (psw_user_bits & ~PSW_MASK_ASC) | PSW_ASC_PRIMARY; | |
c1821c2e | 310 | #ifdef CONFIG_COMPAT |
b50511e4 MS |
311 | psw32_user_bits = |
312 | (psw32_user_bits & ~PSW32_MASK_ASC) | PSW32_ASC_PRIMARY; | |
c1821c2e | 313 | #endif |
bad4c9c8 | 314 | uaccess = MACHINE_HAS_MVCOS ? uaccess_mvcos_switch : uaccess_pt; |
c1821c2e GS |
315 | } |
316 | ||
b11b5334 | 317 | static int __init early_parse_user_mode(char *p) |
c1821c2e | 318 | { |
b11b5334 | 319 | if (p && strcmp(p, "primary") == 0) |
d1b0d842 | 320 | s390_user_mode = PRIMARY_SPACE_MODE; |
b11b5334 | 321 | else if (!p || strcmp(p, "home") == 0) |
d1b0d842 | 322 | s390_user_mode = HOME_SPACE_MODE; |
b11b5334 MS |
323 | else |
324 | return 1; | |
3b6ed4ab | 325 | return 0; |
c1821c2e | 326 | } |
b11b5334 | 327 | early_param("user_mode", early_parse_user_mode); |
c1821c2e | 328 | |
bad4c9c8 | 329 | static void __init setup_addressing_mode(void) |
c1821c2e | 330 | { |
bad4c9c8 HC |
331 | if (s390_user_mode != PRIMARY_SPACE_MODE) |
332 | return; | |
333 | set_user_mode_primary(); | |
334 | if (MACHINE_HAS_MVCOS) | |
335 | pr_info("Address spaces switched, mvcos available\n"); | |
336 | else | |
337 | pr_info("Address spaces switched, mvcos not available\n"); | |
c1821c2e GS |
338 | } |
339 | ||
8b646bd7 MS |
340 | void *restart_stack __attribute__((__section__(".data"))); |
341 | ||
342 | static void __init setup_lowcore(void) | |
c9e37353 HC |
343 | { |
344 | struct _lowcore *lc; | |
c9e37353 HC |
345 | |
346 | /* | |
347 | * Setup lowcore for boot cpu | |
348 | */ | |
cbb870c8 | 349 | BUILD_BUG_ON(sizeof(struct _lowcore) != LC_PAGES * 4096); |
a0878656 | 350 | lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0); |
b50511e4 | 351 | lc->restart_psw.mask = psw_kernel_bits; |
c9e37353 | 352 | lc->restart_psw.addr = |
8b646bd7 | 353 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; |
b50511e4 MS |
354 | lc->external_new_psw.mask = psw_kernel_bits | |
355 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 HC |
356 | lc->external_new_psw.addr = |
357 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
b50511e4 MS |
358 | lc->svc_new_psw.mask = psw_kernel_bits | |
359 | PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK; | |
c9e37353 | 360 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
b50511e4 MS |
361 | lc->program_new_psw.mask = psw_kernel_bits | |
362 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 | 363 | lc->program_new_psw.addr = |
b50511e4 MS |
364 | PSW_ADDR_AMODE | (unsigned long) pgm_check_handler; |
365 | lc->mcck_new_psw.mask = psw_kernel_bits; | |
c9e37353 HC |
366 | lc->mcck_new_psw.addr = |
367 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
b50511e4 MS |
368 | lc->io_new_psw.mask = psw_kernel_bits | |
369 | PSW_MASK_DAT | PSW_MASK_MCHECK; | |
c9e37353 | 370 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
5a62b192 | 371 | lc->clock_comparator = -1ULL; |
dc7ee00d MS |
372 | lc->kernel_stack = ((unsigned long) &init_thread_union) |
373 | + THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); | |
c9e37353 | 374 | lc->async_stack = (unsigned long) |
dc7ee00d MS |
375 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) |
376 | + ASYNC_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); | |
c9e37353 | 377 | lc->panic_stack = (unsigned long) |
dc7ee00d MS |
378 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) |
379 | + PAGE_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); | |
c9e37353 HC |
380 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
381 | lc->thread_info = (unsigned long) &init_thread_union; | |
25097bf1 | 382 | lc->machine_flags = S390_lowcore.machine_flags; |
14375bc4 MS |
383 | lc->stfl_fac_list = S390_lowcore.stfl_fac_list; |
384 | memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, | |
385 | MAX_FACILITY_BIT/8); | |
347a8dc3 | 386 | #ifndef CONFIG_64BIT |
77fa2245 HC |
387 | if (MACHINE_HAS_IEEE) { |
388 | lc->extended_save_area_addr = (__u32) | |
a0878656 | 389 | __alloc_bootmem_low(PAGE_SIZE, PAGE_SIZE, 0); |
77fa2245 | 390 | /* enable extended save area */ |
c4972f33 | 391 | __ctl_set_bit(14, 29); |
77fa2245 | 392 | } |
c742b31c MS |
393 | #else |
394 | lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; | |
77fa2245 | 395 | #endif |
ab96e798 MS |
396 | lc->sync_enter_timer = S390_lowcore.sync_enter_timer; |
397 | lc->async_enter_timer = S390_lowcore.async_enter_timer; | |
398 | lc->exit_timer = S390_lowcore.exit_timer; | |
399 | lc->user_timer = S390_lowcore.user_timer; | |
400 | lc->system_timer = S390_lowcore.system_timer; | |
401 | lc->steal_timer = S390_lowcore.steal_timer; | |
402 | lc->last_update_timer = S390_lowcore.last_update_timer; | |
403 | lc->last_update_clock = S390_lowcore.last_update_clock; | |
dfd9f7ab | 404 | lc->ftrace_func = S390_lowcore.ftrace_func; |
8b646bd7 MS |
405 | |
406 | restart_stack = __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0); | |
407 | restart_stack += ASYNC_SIZE; | |
408 | ||
409 | /* | |
410 | * Set up PSW restart to call ipl.c:do_restart(). Copy the relevant | |
411 | * restart data to the absolute zero lowcore. This is necesary if | |
412 | * PSW restart is done on an offline CPU that has lowcore zero. | |
413 | */ | |
414 | lc->restart_stack = (unsigned long) restart_stack; | |
415 | lc->restart_fn = (unsigned long) do_restart; | |
416 | lc->restart_data = 0; | |
417 | lc->restart_source = -1UL; | |
73bf463e MH |
418 | |
419 | /* Setup absolute zero lowcore */ | |
fbe76568 HC |
420 | mem_assign_absolute(S390_lowcore.restart_stack, lc->restart_stack); |
421 | mem_assign_absolute(S390_lowcore.restart_fn, lc->restart_fn); | |
422 | mem_assign_absolute(S390_lowcore.restart_data, lc->restart_data); | |
423 | mem_assign_absolute(S390_lowcore.restart_source, lc->restart_source); | |
424 | mem_assign_absolute(S390_lowcore.restart_psw, lc->restart_psw); | |
8b646bd7 | 425 | |
c9e37353 | 426 | set_prefix((u32)(unsigned long) lc); |
099b7651 | 427 | lowcore_ptr[0] = lc; |
c9e37353 HC |
428 | } |
429 | ||
71189284 HC |
430 | static struct resource code_resource = { |
431 | .name = "Kernel code", | |
432 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
433 | }; | |
434 | ||
435 | static struct resource data_resource = { | |
436 | .name = "Kernel data", | |
437 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
438 | }; | |
439 | ||
4cc69531 HC |
440 | static struct resource bss_resource = { |
441 | .name = "Kernel bss", | |
442 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
443 | }; | |
444 | ||
71189284 HC |
445 | static struct resource __initdata *standard_resources[] = { |
446 | &code_resource, | |
447 | &data_resource, | |
4cc69531 | 448 | &bss_resource, |
71189284 HC |
449 | }; |
450 | ||
451 | static void __init setup_resources(void) | |
c9e37353 | 452 | { |
71189284 HC |
453 | struct resource *res, *std_res, *sub_res; |
454 | int i, j; | |
c9e37353 | 455 | |
cc13ad62 HC |
456 | code_resource.start = (unsigned long) &_text; |
457 | code_resource.end = (unsigned long) &_etext - 1; | |
458 | data_resource.start = (unsigned long) &_etext; | |
459 | data_resource.end = (unsigned long) &_edata - 1; | |
4cc69531 HC |
460 | bss_resource.start = (unsigned long) &__bss_start; |
461 | bss_resource.end = (unsigned long) &__bss_stop - 1; | |
cc13ad62 | 462 | |
9f4b0ba8 HC |
463 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
464 | if (!memory_chunk[i].size) | |
465 | continue; | |
71189284 | 466 | res = alloc_bootmem_low(sizeof(*res)); |
c9e37353 HC |
467 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; |
468 | switch (memory_chunk[i].type) { | |
469 | case CHUNK_READ_WRITE: | |
470 | res->name = "System RAM"; | |
471 | break; | |
472 | case CHUNK_READ_ONLY: | |
473 | res->name = "System ROM"; | |
474 | res->flags |= IORESOURCE_READONLY; | |
475 | break; | |
476 | default: | |
477 | res->name = "reserved"; | |
478 | } | |
479 | res->start = memory_chunk[i].addr; | |
71189284 | 480 | res->end = res->start + memory_chunk[i].size - 1; |
c9e37353 | 481 | request_resource(&iomem_resource, res); |
fe355b7f | 482 | |
71189284 HC |
483 | for (j = 0; j < ARRAY_SIZE(standard_resources); j++) { |
484 | std_res = standard_resources[j]; | |
485 | if (std_res->start < res->start || | |
486 | std_res->start > res->end) | |
487 | continue; | |
488 | if (std_res->end > res->end) { | |
489 | sub_res = alloc_bootmem_low(sizeof(*sub_res)); | |
490 | *sub_res = *std_res; | |
491 | sub_res->end = res->end; | |
492 | std_res->start = res->end + 1; | |
493 | request_resource(res, sub_res); | |
494 | } else { | |
495 | request_resource(res, std_res); | |
496 | } | |
fe355b7f | 497 | } |
c9e37353 HC |
498 | } |
499 | } | |
500 | ||
8b62bc96 HC |
501 | static void __init setup_memory_end(void) |
502 | { | |
14045ebf | 503 | unsigned long vmax, vmalloc_size, tmp; |
118131a2 | 504 | unsigned long real_memory_size = 0; |
8b62bc96 HC |
505 | int i; |
506 | ||
60a0c68d | 507 | |
59f2e69d | 508 | #ifdef CONFIG_ZFCPDUMP |
3f25dc4f | 509 | if (ipl_info.type == IPL_TYPE_FCP_DUMP && !OLDMEM_BASE) { |
411ed322 | 510 | memory_end = ZFCPDUMP_HSA_SIZE; |
23d75d9c HC |
511 | memory_end_set = 1; |
512 | } | |
411ed322 | 513 | #endif |
8b62bc96 HC |
514 | memory_end &= PAGE_MASK; |
515 | ||
9f4b0ba8 HC |
516 | /* |
517 | * Make sure all chunks are MAX_ORDER aligned so we don't need the | |
518 | * extra checks that HOLES_IN_ZONE would require. | |
519 | */ | |
520 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
521 | unsigned long start, end; | |
522 | struct mem_chunk *chunk; | |
523 | unsigned long align; | |
524 | ||
525 | chunk = &memory_chunk[i]; | |
996b4a7d | 526 | if (!chunk->size) |
67b5c3ee | 527 | continue; |
9f4b0ba8 HC |
528 | align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); |
529 | start = (chunk->addr + align - 1) & ~(align - 1); | |
530 | end = (chunk->addr + chunk->size) & ~(align - 1); | |
531 | if (start >= end) | |
532 | memset(chunk, 0, sizeof(*chunk)); | |
533 | else { | |
534 | chunk->addr = start; | |
535 | chunk->size = end - start; | |
536 | } | |
14045ebf MS |
537 | real_memory_size = max(real_memory_size, |
538 | chunk->addr + chunk->size); | |
9f4b0ba8 HC |
539 | } |
540 | ||
14045ebf MS |
541 | /* Choose kernel address space layout: 2, 3, or 4 levels. */ |
542 | #ifdef CONFIG_64BIT | |
c972cc60 | 543 | vmalloc_size = VMALLOC_END ?: (128UL << 30) - MODULES_LEN; |
14045ebf MS |
544 | tmp = (memory_end ?: real_memory_size) / PAGE_SIZE; |
545 | tmp = tmp * (sizeof(struct page) + PAGE_SIZE) + vmalloc_size; | |
546 | if (tmp <= (1UL << 42)) | |
547 | vmax = 1UL << 42; /* 3-level kernel page table */ | |
548 | else | |
549 | vmax = 1UL << 53; /* 4-level kernel page table */ | |
c972cc60 HC |
550 | /* module area is at the end of the kernel address space. */ |
551 | MODULES_END = vmax; | |
552 | MODULES_VADDR = MODULES_END - MODULES_LEN; | |
553 | VMALLOC_END = MODULES_VADDR; | |
14045ebf MS |
554 | #else |
555 | vmalloc_size = VMALLOC_END ?: 96UL << 20; | |
556 | vmax = 1UL << 31; /* 2-level kernel page table */ | |
14045ebf MS |
557 | /* vmalloc area is at the end of the kernel address space. */ |
558 | VMALLOC_END = vmax; | |
c972cc60 | 559 | #endif |
14045ebf MS |
560 | VMALLOC_START = vmax - vmalloc_size; |
561 | ||
562 | /* Split remaining virtual space between 1:1 mapping & vmemmap array */ | |
563 | tmp = VMALLOC_START / (PAGE_SIZE + sizeof(struct page)); | |
a7bb1ae7 HC |
564 | /* vmemmap contains a multiple of PAGES_PER_SECTION struct pages */ |
565 | tmp = SECTION_ALIGN_UP(tmp); | |
14045ebf MS |
566 | tmp = VMALLOC_START - tmp * sizeof(struct page); |
567 | tmp &= ~((vmax >> 11) - 1); /* align to page table level */ | |
568 | tmp = min(tmp, 1UL << MAX_PHYSMEM_BITS); | |
569 | vmemmap = (struct page *) tmp; | |
570 | ||
571 | /* Take care that memory_end is set and <= vmemmap */ | |
572 | memory_end = min(memory_end ?: real_memory_size, tmp); | |
573 | ||
574 | /* Fixup memory chunk array to fit into 0..memory_end */ | |
8b62bc96 HC |
575 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
576 | struct mem_chunk *chunk = &memory_chunk[i]; | |
577 | ||
996b4a7d | 578 | if (!chunk->size) |
67b5c3ee | 579 | continue; |
14045ebf | 580 | if (chunk->addr >= memory_end) { |
8b62bc96 HC |
581 | memset(chunk, 0, sizeof(*chunk)); |
582 | continue; | |
583 | } | |
14045ebf MS |
584 | if (chunk->addr + chunk->size > memory_end) |
585 | chunk->size = memory_end - chunk->addr; | |
8b62bc96 | 586 | } |
8b62bc96 HC |
587 | } |
588 | ||
d38593f9 MH |
589 | static void __init setup_vmcoreinfo(void) |
590 | { | |
fbe76568 | 591 | mem_assign_absolute(S390_lowcore.vmcore_info, paddr_vmcoreinfo_note()); |
d38593f9 MH |
592 | } |
593 | ||
60a0c68d MH |
594 | #ifdef CONFIG_CRASH_DUMP |
595 | ||
596 | /* | |
597 | * Find suitable location for crashkernel memory | |
598 | */ | |
599 | static unsigned long __init find_crash_base(unsigned long crash_size, | |
600 | char **msg) | |
601 | { | |
602 | unsigned long crash_base; | |
603 | struct mem_chunk *chunk; | |
604 | int i; | |
605 | ||
606 | if (memory_chunk[0].size < crash_size) { | |
607 | *msg = "first memory chunk must be at least crashkernel size"; | |
608 | return 0; | |
609 | } | |
5f894cbb | 610 | if (OLDMEM_BASE && crash_size == OLDMEM_SIZE) |
60a0c68d MH |
611 | return OLDMEM_BASE; |
612 | ||
613 | for (i = MEMORY_CHUNKS - 1; i >= 0; i--) { | |
614 | chunk = &memory_chunk[i]; | |
615 | if (chunk->size == 0) | |
616 | continue; | |
617 | if (chunk->type != CHUNK_READ_WRITE) | |
618 | continue; | |
619 | if (chunk->size < crash_size) | |
620 | continue; | |
621 | crash_base = (chunk->addr + chunk->size) - crash_size; | |
622 | if (crash_base < crash_size) | |
623 | continue; | |
624 | if (crash_base < ZFCPDUMP_HSA_SIZE_MAX) | |
625 | continue; | |
626 | if (crash_base < (unsigned long) INITRD_START + INITRD_SIZE) | |
627 | continue; | |
628 | return crash_base; | |
629 | } | |
630 | *msg = "no suitable area found"; | |
631 | return 0; | |
632 | } | |
633 | ||
634 | /* | |
635 | * Check if crash_base and crash_size is valid | |
636 | */ | |
637 | static int __init verify_crash_base(unsigned long crash_base, | |
638 | unsigned long crash_size, | |
639 | char **msg) | |
640 | { | |
641 | struct mem_chunk *chunk; | |
642 | int i; | |
643 | ||
644 | /* | |
645 | * Because we do the swap to zero, we must have at least 'crash_size' | |
646 | * bytes free space before crash_base | |
647 | */ | |
648 | if (crash_size > crash_base) { | |
649 | *msg = "crashkernel offset must be greater than size"; | |
650 | return -EINVAL; | |
651 | } | |
652 | ||
653 | /* First memory chunk must be at least crash_size */ | |
654 | if (memory_chunk[0].size < crash_size) { | |
655 | *msg = "first memory chunk must be at least crashkernel size"; | |
656 | return -EINVAL; | |
657 | } | |
658 | /* Check if we fit into the respective memory chunk */ | |
659 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
660 | chunk = &memory_chunk[i]; | |
661 | if (chunk->size == 0) | |
662 | continue; | |
663 | if (crash_base < chunk->addr) | |
664 | continue; | |
665 | if (crash_base >= chunk->addr + chunk->size) | |
666 | continue; | |
667 | /* we have found the memory chunk */ | |
668 | if (crash_base + crash_size > chunk->addr + chunk->size) { | |
669 | *msg = "selected memory chunk is too small for " | |
670 | "crashkernel memory"; | |
671 | return -EINVAL; | |
672 | } | |
673 | return 0; | |
674 | } | |
675 | *msg = "invalid memory range specified"; | |
676 | return -EINVAL; | |
677 | } | |
678 | ||
60a0c68d MH |
679 | /* |
680 | * When kdump is enabled, we have to ensure that no memory from | |
681 | * the area [0 - crashkernel memory size] and | |
682 | * [crashk_res.start - crashk_res.end] is set offline. | |
683 | */ | |
684 | static int kdump_mem_notifier(struct notifier_block *nb, | |
685 | unsigned long action, void *data) | |
686 | { | |
687 | struct memory_notify *arg = data; | |
688 | ||
689 | if (arg->start_pfn < PFN_DOWN(resource_size(&crashk_res))) | |
690 | return NOTIFY_BAD; | |
691 | if (arg->start_pfn > PFN_DOWN(crashk_res.end)) | |
692 | return NOTIFY_OK; | |
693 | if (arg->start_pfn + arg->nr_pages - 1 < PFN_DOWN(crashk_res.start)) | |
694 | return NOTIFY_OK; | |
695 | return NOTIFY_BAD; | |
696 | } | |
697 | ||
698 | static struct notifier_block kdump_mem_nb = { | |
699 | .notifier_call = kdump_mem_notifier, | |
700 | }; | |
701 | ||
702 | #endif | |
703 | ||
704 | /* | |
705 | * Make sure that oldmem, where the dump is stored, is protected | |
706 | */ | |
707 | static void reserve_oldmem(void) | |
708 | { | |
709 | #ifdef CONFIG_CRASH_DUMP | |
118131a2 HC |
710 | unsigned long real_size = 0; |
711 | int i; | |
712 | ||
60a0c68d MH |
713 | if (!OLDMEM_BASE) |
714 | return; | |
118131a2 HC |
715 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
716 | struct mem_chunk *chunk = &memory_chunk[i]; | |
60a0c68d | 717 | |
118131a2 HC |
718 | real_size = max(real_size, chunk->addr + chunk->size); |
719 | } | |
996b4a7d HC |
720 | create_mem_hole(memory_chunk, OLDMEM_BASE, OLDMEM_SIZE); |
721 | create_mem_hole(memory_chunk, OLDMEM_SIZE, real_size - OLDMEM_SIZE); | |
60a0c68d MH |
722 | #endif |
723 | } | |
724 | ||
725 | /* | |
726 | * Reserve memory for kdump kernel to be loaded with kexec | |
727 | */ | |
728 | static void __init reserve_crashkernel(void) | |
729 | { | |
730 | #ifdef CONFIG_CRASH_DUMP | |
731 | unsigned long long crash_base, crash_size; | |
4fdf7f43 | 732 | char *msg = NULL; |
60a0c68d MH |
733 | int rc; |
734 | ||
735 | rc = parse_crashkernel(boot_command_line, memory_end, &crash_size, | |
736 | &crash_base); | |
737 | if (rc || crash_size == 0) | |
738 | return; | |
dab7a7b1 MH |
739 | crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN); |
740 | crash_size = ALIGN(crash_size, KEXEC_CRASH_MEM_ALIGN); | |
60a0c68d MH |
741 | if (register_memory_notifier(&kdump_mem_nb)) |
742 | return; | |
743 | if (!crash_base) | |
744 | crash_base = find_crash_base(crash_size, &msg); | |
745 | if (!crash_base) { | |
746 | pr_info("crashkernel reservation failed: %s\n", msg); | |
747 | unregister_memory_notifier(&kdump_mem_nb); | |
748 | return; | |
749 | } | |
750 | if (verify_crash_base(crash_base, crash_size, &msg)) { | |
751 | pr_info("crashkernel reservation failed: %s\n", msg); | |
752 | unregister_memory_notifier(&kdump_mem_nb); | |
753 | return; | |
754 | } | |
755 | if (!OLDMEM_BASE && MACHINE_IS_VM) | |
756 | diag10_range(PFN_DOWN(crash_base), PFN_DOWN(crash_size)); | |
757 | crashk_res.start = crash_base; | |
758 | crashk_res.end = crash_base + crash_size - 1; | |
759 | insert_resource(&iomem_resource, &crashk_res); | |
996b4a7d | 760 | create_mem_hole(memory_chunk, crash_base, crash_size); |
60a0c68d MH |
761 | pr_info("Reserving %lluMB of memory at %lluMB " |
762 | "for crashkernel (System RAM: %luMB)\n", | |
763 | crash_size >> 20, crash_base >> 20, memory_end >> 20); | |
4857d4bb | 764 | os_info_crashkernel_add(crash_base, crash_size); |
60a0c68d MH |
765 | #endif |
766 | } | |
767 | ||
8b646bd7 | 768 | static void __init setup_memory(void) |
c9e37353 HC |
769 | { |
770 | unsigned long bootmap_size; | |
fe355b7f | 771 | unsigned long start_pfn, end_pfn; |
c9e37353 | 772 | int i; |
1da177e4 LT |
773 | |
774 | /* | |
775 | * partially used pages are not usable - thus | |
776 | * we are rounding upwards: | |
777 | */ | |
65912a84 HC |
778 | start_pfn = PFN_UP(__pa(&_end)); |
779 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 780 | |
65912a84 HC |
781 | #ifdef CONFIG_BLK_DEV_INITRD |
782 | /* | |
783 | * Move the initrd in case the bitmap of the bootmem allocater | |
784 | * would overwrite it. | |
785 | */ | |
786 | ||
787 | if (INITRD_START && INITRD_SIZE) { | |
788 | unsigned long bmap_size; | |
789 | unsigned long start; | |
790 | ||
791 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
792 | bmap_size = PFN_PHYS(bmap_size); | |
793 | ||
794 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
795 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
796 | ||
60a0c68d MH |
797 | #ifdef CONFIG_CRASH_DUMP |
798 | if (OLDMEM_BASE) { | |
799 | /* Move initrd behind kdump oldmem */ | |
800 | if (start + INITRD_SIZE > OLDMEM_BASE && | |
801 | start < OLDMEM_BASE + OLDMEM_SIZE) | |
802 | start = OLDMEM_BASE + OLDMEM_SIZE; | |
803 | } | |
804 | #endif | |
65912a84 | 805 | if (start + INITRD_SIZE > memory_end) { |
3b6ed4ab MS |
806 | pr_err("initrd extends beyond end of " |
807 | "memory (0x%08lx > 0x%08lx) " | |
65912a84 HC |
808 | "disabling initrd\n", |
809 | start + INITRD_SIZE, memory_end); | |
810 | INITRD_START = INITRD_SIZE = 0; | |
811 | } else { | |
3b6ed4ab MS |
812 | pr_info("Moving initrd (0x%08lx -> " |
813 | "0x%08lx, size: %ld)\n", | |
814 | INITRD_START, start, INITRD_SIZE); | |
65912a84 HC |
815 | memmove((void *) start, (void *) INITRD_START, |
816 | INITRD_SIZE); | |
817 | INITRD_START = start; | |
818 | } | |
819 | } | |
820 | } | |
821 | #endif | |
822 | ||
1da177e4 | 823 | /* |
7676bef9 | 824 | * Initialize the boot-time allocator |
1da177e4 LT |
825 | */ |
826 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
827 | ||
828 | /* | |
829 | * Register RAM areas with the bootmem allocator. | |
830 | */ | |
c9e37353 | 831 | |
996b4a7d | 832 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
39b742f9 | 833 | unsigned long start_chunk, end_chunk, pfn; |
1da177e4 | 834 | |
996b4a7d | 835 | if (!memory_chunk[i].size) |
1da177e4 | 836 | continue; |
39b742f9 | 837 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
fb2e7c5e | 838 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |
39b742f9 HC |
839 | end_chunk = min(end_chunk, end_pfn); |
840 | if (start_chunk >= end_chunk) | |
841 | continue; | |
ff38df37 TH |
842 | memblock_add_node(PFN_PHYS(start_chunk), |
843 | PFN_PHYS(end_chunk - start_chunk), 0); | |
39b742f9 | 844 | pfn = max(start_chunk, start_pfn); |
6b70a920 | 845 | storage_key_init_range(PFN_PHYS(pfn), PFN_PHYS(end_chunk)); |
1da177e4 LT |
846 | } |
847 | ||
0b642ede PO |
848 | psw_set_key(PAGE_DEFAULT_KEY); |
849 | ||
39b742f9 | 850 | free_bootmem_with_active_regions(0, max_pfn); |
c9e37353 | 851 | |
615b04b3 HC |
852 | /* |
853 | * Reserve memory used for lowcore/command line/kernel image. | |
854 | */ | |
72a7fe39 | 855 | reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
615b04b3 | 856 | reserve_bootmem((unsigned long)_stext, |
72a7fe39 BW |
857 | PFN_PHYS(start_pfn) - (unsigned long)_stext, |
858 | BOOTMEM_DEFAULT); | |
c9e37353 HC |
859 | /* |
860 | * Reserve the bootmem bitmap itself as well. We do this in two | |
861 | * steps (first step was init_bootmem()) because this catches | |
862 | * the (very unlikely) case of us accidentally initializing the | |
863 | * bootmem allocator with an invalid RAM area. | |
864 | */ | |
72a7fe39 BW |
865 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, |
866 | BOOTMEM_DEFAULT); | |
1da177e4 | 867 | |
60a0c68d MH |
868 | #ifdef CONFIG_CRASH_DUMP |
869 | if (crashk_res.start) | |
870 | reserve_bootmem(crashk_res.start, | |
871 | crashk_res.end - crashk_res.start + 1, | |
872 | BOOTMEM_DEFAULT); | |
873 | if (is_kdump_kernel()) | |
874 | reserve_bootmem(elfcorehdr_addr - OLDMEM_BASE, | |
875 | PAGE_ALIGN(elfcorehdr_size), BOOTMEM_DEFAULT); | |
876 | #endif | |
1da177e4 | 877 | #ifdef CONFIG_BLK_DEV_INITRD |
65912a84 | 878 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 | 879 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
72a7fe39 BW |
880 | reserve_bootmem(INITRD_START, INITRD_SIZE, |
881 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
882 | initrd_start = INITRD_START; |
883 | initrd_end = initrd_start + INITRD_SIZE; | |
884 | } else { | |
3b6ed4ab MS |
885 | pr_err("initrd extends beyond end of " |
886 | "memory (0x%08lx > 0x%08lx) " | |
887 | "disabling initrd\n", | |
c9e37353 HC |
888 | initrd_start + INITRD_SIZE, memory_end); |
889 | initrd_start = initrd_end = 0; | |
1da177e4 | 890 | } |
c9e37353 | 891 | } |
1da177e4 | 892 | #endif |
c9e37353 | 893 | } |
1da177e4 | 894 | |
cf8ba7a9 MS |
895 | /* |
896 | * Setup hardware capabilities. | |
897 | */ | |
898 | static void __init setup_hwcaps(void) | |
899 | { | |
900 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; | |
94038a99 | 901 | struct cpuid cpu_id; |
cf8ba7a9 MS |
902 | int i; |
903 | ||
cf8ba7a9 MS |
904 | /* |
905 | * The store facility list bits numbers as found in the principles | |
906 | * of operation are numbered with bit 1UL<<31 as number 0 to | |
907 | * bit 1UL<<0 as number 31. | |
908 | * Bit 0: instructions named N3, "backported" to esa-mode | |
909 | * Bit 2: z/Architecture mode is active | |
910 | * Bit 7: the store-facility-list-extended facility is installed | |
911 | * Bit 17: the message-security assist is installed | |
912 | * Bit 19: the long-displacement facility is installed | |
913 | * Bit 21: the extended-immediate facility is installed | |
488253ce AK |
914 | * Bit 22: extended-translation facility 3 is installed |
915 | * Bit 30: extended-translation facility 3 enhancement facility | |
cf8ba7a9 MS |
916 | * These get translated to: |
917 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, | |
918 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, | |
488253ce AK |
919 | * HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and |
920 | * HWCAP_S390_ETF3EH bit 8 (22 && 30). | |
cf8ba7a9 MS |
921 | */ |
922 | for (i = 0; i < 6; i++) | |
14375bc4 | 923 | if (test_facility(stfl_bits[i])) |
cf8ba7a9 MS |
924 | elf_hwcap |= 1UL << i; |
925 | ||
14375bc4 | 926 | if (test_facility(22) && test_facility(30)) |
ea2a4d3a | 927 | elf_hwcap |= HWCAP_S390_ETF3EH; |
488253ce | 928 | |
cf8ba7a9 MS |
929 | /* |
930 | * Check for additional facilities with store-facility-list-extended. | |
931 | * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 | |
932 | * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information | |
933 | * as stored by stfl, bits 32-xxx contain additional facilities. | |
934 | * How many facility words are stored depends on the number of | |
25985edc | 935 | * doublewords passed to the instruction. The additional facilities |
cf8ba7a9 | 936 | * are: |
2ac3307f CE |
937 | * Bit 42: decimal floating point facility is installed |
938 | * Bit 44: perform floating point operation facility is installed | |
cf8ba7a9 | 939 | * translated to: |
488253ce | 940 | * HWCAP_S390_DFP bit 6 (42 && 44). |
cf8ba7a9 | 941 | */ |
14375bc4 MS |
942 | if ((elf_hwcap & (1UL << 2)) && test_facility(42) && test_facility(44)) |
943 | elf_hwcap |= HWCAP_S390_DFP; | |
cf8ba7a9 | 944 | |
ea2a4d3a HC |
945 | /* |
946 | * Huge page support HWCAP_S390_HPAGE is bit 7. | |
947 | */ | |
53492b1d | 948 | if (MACHINE_HAS_HPAGE) |
ea2a4d3a HC |
949 | elf_hwcap |= HWCAP_S390_HPAGE; |
950 | ||
db2e1f43 | 951 | #if defined(CONFIG_64BIT) |
ea2a4d3a HC |
952 | /* |
953 | * 64-bit register support for 31-bit processes | |
954 | * HWCAP_S390_HIGH_GPRS is bit 9. | |
955 | */ | |
956 | elf_hwcap |= HWCAP_S390_HIGH_GPRS; | |
d35339a4 MS |
957 | |
958 | /* | |
959 | * Transactional execution support HWCAP_S390_TE is bit 10. | |
960 | */ | |
961 | if (test_facility(50) && test_facility(73)) | |
962 | elf_hwcap |= HWCAP_S390_TE; | |
db2e1f43 | 963 | #endif |
53492b1d | 964 | |
94038a99 MS |
965 | get_cpu_id(&cpu_id); |
966 | switch (cpu_id.machine) { | |
cf8ba7a9 MS |
967 | case 0x9672: |
968 | #if !defined(CONFIG_64BIT) | |
969 | default: /* Use "g5" as default for 31 bit kernels. */ | |
970 | #endif | |
971 | strcpy(elf_platform, "g5"); | |
972 | break; | |
973 | case 0x2064: | |
974 | case 0x2066: | |
975 | #if defined(CONFIG_64BIT) | |
976 | default: /* Use "z900" as default for 64 bit kernels. */ | |
977 | #endif | |
978 | strcpy(elf_platform, "z900"); | |
979 | break; | |
980 | case 0x2084: | |
981 | case 0x2086: | |
982 | strcpy(elf_platform, "z990"); | |
983 | break; | |
984 | case 0x2094: | |
9fee8db2 | 985 | case 0x2096: |
cf8ba7a9 MS |
986 | strcpy(elf_platform, "z9-109"); |
987 | break; | |
9fee8db2 MS |
988 | case 0x2097: |
989 | case 0x2098: | |
990 | strcpy(elf_platform, "z10"); | |
991 | break; | |
c84b9051 | 992 | case 0x2817: |
3a81b171 | 993 | case 0x2818: |
c84b9051 HC |
994 | strcpy(elf_platform, "z196"); |
995 | break; | |
991c1505 | 996 | case 0x2827: |
59471227 | 997 | case 0x2828: |
991c1505 HC |
998 | strcpy(elf_platform, "zEC12"); |
999 | break; | |
cf8ba7a9 MS |
1000 | } |
1001 | } | |
1002 | ||
c9e37353 HC |
1003 | /* |
1004 | * Setup function called from init/main.c just after the banner | |
1005 | * was printed. | |
1006 | */ | |
1da177e4 | 1007 | |
8b646bd7 | 1008 | void __init setup_arch(char **cmdline_p) |
c9e37353 | 1009 | { |
1da177e4 | 1010 | /* |
c9e37353 | 1011 | * print what head.S has found out about the machine |
1da177e4 | 1012 | */ |
347a8dc3 | 1013 | #ifndef CONFIG_64BIT |
3b6ed4ab MS |
1014 | if (MACHINE_IS_VM) |
1015 | pr_info("Linux is running as a z/VM " | |
1016 | "guest operating system in 31-bit mode\n"); | |
27d71602 | 1017 | else if (MACHINE_IS_LPAR) |
3b6ed4ab MS |
1018 | pr_info("Linux is running natively in 31-bit mode\n"); |
1019 | if (MACHINE_HAS_IEEE) | |
1020 | pr_info("The hardware system has IEEE compatible " | |
1021 | "floating point units\n"); | |
1022 | else | |
1023 | pr_info("The hardware system has no IEEE compatible " | |
1024 | "floating point units\n"); | |
347a8dc3 | 1025 | #else /* CONFIG_64BIT */ |
fa587743 | 1026 | if (MACHINE_IS_VM) |
3b6ed4ab MS |
1027 | pr_info("Linux is running as a z/VM " |
1028 | "guest operating system in 64-bit mode\n"); | |
637952ca | 1029 | else if (MACHINE_IS_KVM) |
3b6ed4ab | 1030 | pr_info("Linux is running under KVM in 64-bit mode\n"); |
27d71602 | 1031 | else if (MACHINE_IS_LPAR) |
3b6ed4ab | 1032 | pr_info("Linux is running natively in 64-bit mode\n"); |
347a8dc3 | 1033 | #endif /* CONFIG_64BIT */ |
c9e37353 | 1034 | |
a0443fbb HB |
1035 | /* Have one command line that is parsed and saved in /proc/cmdline */ |
1036 | /* boot_command_line has been already set up in early.c */ | |
1037 | *cmdline_p = boot_command_line; | |
59685296 | 1038 | |
c9e37353 | 1039 | ROOT_DEV = Root_RAM0; |
59685296 HC |
1040 | |
1041 | init_mm.start_code = PAGE_OFFSET; | |
1042 | init_mm.end_code = (unsigned long) &_etext; | |
1043 | init_mm.end_data = (unsigned long) &_edata; | |
1044 | init_mm.brk = (unsigned long) &_end; | |
1045 | ||
6c2a9e6d GS |
1046 | if (MACHINE_HAS_MVCOS) |
1047 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); | |
1048 | else | |
1049 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); | |
1050 | ||
59685296 | 1051 | parse_early_param(); |
df1bd59c | 1052 | detect_memory_layout(memory_chunk, memory_end); |
4857d4bb | 1053 | os_info_init(); |
99ca4e58 | 1054 | setup_ipl(); |
67b5c3ee | 1055 | reserve_oldmem(); |
8b62bc96 | 1056 | setup_memory_end(); |
c1821c2e | 1057 | setup_addressing_mode(); |
60a0c68d | 1058 | reserve_crashkernel(); |
c9e37353 HC |
1059 | setup_memory(); |
1060 | setup_resources(); | |
d38593f9 | 1061 | setup_vmcoreinfo(); |
c9e37353 HC |
1062 | setup_lowcore(); |
1063 | ||
1da177e4 | 1064 | cpu_init(); |
dbd70fb4 | 1065 | s390_init_cpu_topology(); |
1da177e4 | 1066 | |
cf8ba7a9 MS |
1067 | /* |
1068 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). | |
1069 | */ | |
1070 | setup_hwcaps(); | |
1071 | ||
1da177e4 LT |
1072 | /* |
1073 | * Create kernel page tables and switch to virtual addressing. | |
1074 | */ | |
1075 | paging_init(); | |
1076 | ||
1077 | /* Setup default console */ | |
1078 | conmode_default(); | |
637952ca | 1079 | set_preferred_console(); |
411ed322 MH |
1080 | |
1081 | /* Setup zfcpdump support */ | |
fe72ffba | 1082 | setup_zfcpdump(); |
1da177e4 | 1083 | } |