]>
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> |
1e3cab2f | 50 | #include <asm/facility.h> |
1da177e4 LT |
51 | #include <asm/smp.h> |
52 | #include <asm/mmu_context.h> | |
53 | #include <asm/cpcmd.h> | |
54 | #include <asm/lowcore.h> | |
55 | #include <asm/irq.h> | |
0b642ede PO |
56 | #include <asm/page.h> |
57 | #include <asm/ptrace.h> | |
cc13ad62 | 58 | #include <asm/sections.h> |
fe355b7f | 59 | #include <asm/ebcdic.h> |
faeba830 | 60 | #include <asm/kvm_virtio.h> |
60a0c68d | 61 | #include <asm/diag.h> |
4857d4bb | 62 | #include <asm/os_info.h> |
cd183459 | 63 | #include <asm/sclp.h> |
8b646bd7 | 64 | #include "entry.h" |
c1821c2e | 65 | |
1da177e4 LT |
66 | /* |
67 | * Machine setup.. | |
68 | */ | |
69 | unsigned int console_mode = 0; | |
1485c5c8 HC |
70 | EXPORT_SYMBOL(console_mode); |
71 | ||
1da177e4 | 72 | unsigned int console_devno = -1; |
1485c5c8 HC |
73 | EXPORT_SYMBOL(console_devno); |
74 | ||
1da177e4 | 75 | unsigned int console_irq = -1; |
1485c5c8 HC |
76 | EXPORT_SYMBOL(console_irq); |
77 | ||
cf8ba7a9 MS |
78 | unsigned long elf_hwcap = 0; |
79 | char elf_platform[ELF_PLATFORM_SIZE]; | |
36a2bd42 | 80 | |
23d17421 | 81 | struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
23d75d9c HC |
82 | |
83 | int __initdata memory_end_set; | |
84 | unsigned long __initdata memory_end; | |
1da177e4 | 85 | |
14045ebf MS |
86 | unsigned long VMALLOC_START; |
87 | EXPORT_SYMBOL(VMALLOC_START); | |
88 | ||
89 | unsigned long VMALLOC_END; | |
90 | EXPORT_SYMBOL(VMALLOC_END); | |
91 | ||
92 | struct page *vmemmap; | |
93 | EXPORT_SYMBOL(vmemmap); | |
94 | ||
c972cc60 HC |
95 | #ifdef CONFIG_64BIT |
96 | unsigned long MODULES_VADDR; | |
97 | unsigned long MODULES_END; | |
98 | #endif | |
99 | ||
099b7651 FM |
100 | /* An array with a pointer to the lowcore of every CPU. */ |
101 | struct _lowcore *lowcore_ptr[NR_CPUS]; | |
102 | EXPORT_SYMBOL(lowcore_ptr); | |
103 | ||
1da177e4 LT |
104 | /* |
105 | * This is set up by the setup-routine at boot-time | |
106 | * for S390 need to find out, what we have to setup | |
107 | * using address 0x10400 ... | |
108 | */ | |
109 | ||
110 | #include <asm/setup.h> | |
111 | ||
1da177e4 LT |
112 | /* |
113 | * condev= and conmode= setup parameter. | |
114 | */ | |
115 | ||
116 | static int __init condev_setup(char *str) | |
117 | { | |
118 | int vdev; | |
119 | ||
120 | vdev = simple_strtoul(str, &str, 0); | |
121 | if (vdev >= 0 && vdev < 65536) { | |
122 | console_devno = vdev; | |
123 | console_irq = -1; | |
124 | } | |
125 | return 1; | |
126 | } | |
127 | ||
128 | __setup("condev=", condev_setup); | |
129 | ||
637952ca HB |
130 | static void __init set_preferred_console(void) |
131 | { | |
cd183459 HG |
132 | if (MACHINE_IS_KVM) { |
133 | if (sclp_has_vt220()) | |
134 | add_preferred_console("ttyS", 1, NULL); | |
135 | else if (sclp_has_linemode()) | |
136 | add_preferred_console("ttyS", 0, NULL); | |
137 | else | |
138 | add_preferred_console("hvc", 0, NULL); | |
139 | } else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) | |
637952ca | 140 | add_preferred_console("ttyS", 0, NULL); |
c4de0c1a | 141 | else if (CONSOLE_IS_3270) |
637952ca HB |
142 | add_preferred_console("tty3270", 0, NULL); |
143 | } | |
144 | ||
1da177e4 LT |
145 | static int __init conmode_setup(char *str) |
146 | { | |
8c0933ee | 147 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
148 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) |
149 | SET_CONSOLE_SCLP; | |
150 | #endif | |
151 | #if defined(CONFIG_TN3215_CONSOLE) | |
152 | if (strncmp(str, "3215", 5) == 0) | |
153 | SET_CONSOLE_3215; | |
154 | #endif | |
155 | #if defined(CONFIG_TN3270_CONSOLE) | |
156 | if (strncmp(str, "3270", 5) == 0) | |
157 | SET_CONSOLE_3270; | |
158 | #endif | |
637952ca | 159 | set_preferred_console(); |
1da177e4 LT |
160 | return 1; |
161 | } | |
162 | ||
163 | __setup("conmode=", conmode_setup); | |
164 | ||
165 | static void __init conmode_default(void) | |
166 | { | |
167 | char query_buffer[1024]; | |
168 | char *ptr; | |
169 | ||
170 | if (MACHINE_IS_VM) { | |
740b5706 | 171 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
172 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
173 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
174 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
740b5706 | 175 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
176 | ptr = strstr(query_buffer, "CONMODE"); |
177 | /* | |
178 | * Set the conmode to 3215 so that the device recognition | |
179 | * will set the cu_type of the console to 3215. If the | |
180 | * conmode is 3270 and we don't set it back then both | |
181 | * 3215 and the 3270 driver will try to access the console | |
182 | * device (3215 as console and 3270 as normal tty). | |
183 | */ | |
740b5706 | 184 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 | 185 | if (ptr == NULL) { |
8c0933ee | 186 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
187 | SET_CONSOLE_SCLP; |
188 | #endif | |
189 | return; | |
190 | } | |
191 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
192 | #if defined(CONFIG_TN3270_CONSOLE) | |
193 | SET_CONSOLE_3270; | |
194 | #elif defined(CONFIG_TN3215_CONSOLE) | |
195 | SET_CONSOLE_3215; | |
8c0933ee | 196 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
197 | SET_CONSOLE_SCLP; |
198 | #endif | |
199 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
200 | #if defined(CONFIG_TN3215_CONSOLE) | |
201 | SET_CONSOLE_3215; | |
202 | #elif defined(CONFIG_TN3270_CONSOLE) | |
203 | SET_CONSOLE_3270; | |
8c0933ee | 204 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
205 | SET_CONSOLE_SCLP; |
206 | #endif | |
207 | } | |
1da177e4 | 208 | } else { |
8c0933ee | 209 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
210 | SET_CONSOLE_SCLP; |
211 | #endif | |
212 | } | |
213 | } | |
214 | ||
59f2e69d | 215 | #ifdef CONFIG_ZFCPDUMP |
fe72ffba | 216 | static void __init setup_zfcpdump(void) |
411ed322 | 217 | { |
411ed322 MH |
218 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) |
219 | return; | |
3f25dc4f MH |
220 | if (OLDMEM_BASE) |
221 | return; | |
fe72ffba | 222 | strcat(boot_command_line, " cio_ignore=all,!ipldev,!condev"); |
411ed322 MH |
223 | console_loglevel = 2; |
224 | } | |
225 | #else | |
fe72ffba | 226 | static inline void setup_zfcpdump(void) {} |
411ed322 MH |
227 | #endif /* CONFIG_ZFCPDUMP */ |
228 | ||
1da177e4 LT |
229 | /* |
230 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
231 | * _machine_halt or _machine_power_off. | |
232 | */ | |
233 | ||
234 | void machine_restart(char *command) | |
235 | { | |
7aa8dac7 | 236 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
06fa46a2 MS |
237 | /* |
238 | * Only unblank the console if we are called in enabled | |
239 | * context or a bust_spinlocks cleared the way for us. | |
240 | */ | |
241 | console_unblank(); | |
1da177e4 LT |
242 | _machine_restart(command); |
243 | } | |
244 | ||
1da177e4 LT |
245 | void machine_halt(void) |
246 | { | |
06fa46a2 MS |
247 | if (!in_interrupt() || oops_in_progress) |
248 | /* | |
249 | * Only unblank the console if we are called in enabled | |
250 | * context or a bust_spinlocks cleared the way for us. | |
251 | */ | |
252 | console_unblank(); | |
1da177e4 LT |
253 | _machine_halt(); |
254 | } | |
255 | ||
1da177e4 LT |
256 | void machine_power_off(void) |
257 | { | |
06fa46a2 MS |
258 | if (!in_interrupt() || oops_in_progress) |
259 | /* | |
260 | * Only unblank the console if we are called in enabled | |
261 | * context or a bust_spinlocks cleared the way for us. | |
262 | */ | |
263 | console_unblank(); | |
1da177e4 LT |
264 | _machine_power_off(); |
265 | } | |
266 | ||
53df751c MS |
267 | /* |
268 | * Dummy power off function. | |
269 | */ | |
270 | void (*pm_power_off)(void) = machine_power_off; | |
0872922f | 271 | EXPORT_SYMBOL_GPL(pm_power_off); |
53df751c | 272 | |
59685296 HC |
273 | static int __init early_parse_mem(char *p) |
274 | { | |
275 | memory_end = memparse(p, &p); | |
23d75d9c | 276 | memory_end_set = 1; |
59685296 HC |
277 | return 0; |
278 | } | |
279 | early_param("mem", early_parse_mem); | |
280 | ||
14045ebf MS |
281 | static int __init parse_vmalloc(char *arg) |
282 | { | |
283 | if (!arg) | |
284 | return -EINVAL; | |
285 | VMALLOC_END = (memparse(arg, &arg) + PAGE_SIZE - 1) & PAGE_MASK; | |
286 | return 0; | |
287 | } | |
288 | early_param("vmalloc", parse_vmalloc); | |
289 | ||
8b646bd7 MS |
290 | void *restart_stack __attribute__((__section__(".data"))); |
291 | ||
292 | static void __init setup_lowcore(void) | |
c9e37353 HC |
293 | { |
294 | struct _lowcore *lc; | |
c9e37353 HC |
295 | |
296 | /* | |
297 | * Setup lowcore for boot cpu | |
298 | */ | |
cbb870c8 | 299 | BUILD_BUG_ON(sizeof(struct _lowcore) != LC_PAGES * 4096); |
a0878656 | 300 | lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0); |
e258d719 | 301 | lc->restart_psw.mask = PSW_KERNEL_BITS; |
c9e37353 | 302 | lc->restart_psw.addr = |
8b646bd7 | 303 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; |
e258d719 | 304 | lc->external_new_psw.mask = PSW_KERNEL_BITS | |
b50511e4 | 305 | PSW_MASK_DAT | PSW_MASK_MCHECK; |
c9e37353 HC |
306 | lc->external_new_psw.addr = |
307 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
e258d719 | 308 | lc->svc_new_psw.mask = PSW_KERNEL_BITS | |
b50511e4 | 309 | PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK; |
c9e37353 | 310 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
e258d719 | 311 | lc->program_new_psw.mask = PSW_KERNEL_BITS | |
b50511e4 | 312 | PSW_MASK_DAT | PSW_MASK_MCHECK; |
c9e37353 | 313 | lc->program_new_psw.addr = |
b50511e4 | 314 | PSW_ADDR_AMODE | (unsigned long) pgm_check_handler; |
e258d719 | 315 | lc->mcck_new_psw.mask = PSW_KERNEL_BITS; |
c9e37353 HC |
316 | lc->mcck_new_psw.addr = |
317 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
e258d719 | 318 | lc->io_new_psw.mask = PSW_KERNEL_BITS | |
b50511e4 | 319 | PSW_MASK_DAT | PSW_MASK_MCHECK; |
c9e37353 | 320 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
5a62b192 | 321 | lc->clock_comparator = -1ULL; |
dc7ee00d MS |
322 | lc->kernel_stack = ((unsigned long) &init_thread_union) |
323 | + THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); | |
c9e37353 | 324 | lc->async_stack = (unsigned long) |
dc7ee00d MS |
325 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) |
326 | + ASYNC_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); | |
c9e37353 | 327 | lc->panic_stack = (unsigned long) |
dc7ee00d MS |
328 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) |
329 | + PAGE_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); | |
c9e37353 HC |
330 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
331 | lc->thread_info = (unsigned long) &init_thread_union; | |
25097bf1 | 332 | lc->machine_flags = S390_lowcore.machine_flags; |
14375bc4 MS |
333 | lc->stfl_fac_list = S390_lowcore.stfl_fac_list; |
334 | memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, | |
335 | MAX_FACILITY_BIT/8); | |
347a8dc3 | 336 | #ifndef CONFIG_64BIT |
77fa2245 HC |
337 | if (MACHINE_HAS_IEEE) { |
338 | lc->extended_save_area_addr = (__u32) | |
a0878656 | 339 | __alloc_bootmem_low(PAGE_SIZE, PAGE_SIZE, 0); |
77fa2245 | 340 | /* enable extended save area */ |
c4972f33 | 341 | __ctl_set_bit(14, 29); |
77fa2245 | 342 | } |
c742b31c MS |
343 | #else |
344 | lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; | |
77fa2245 | 345 | #endif |
ab96e798 MS |
346 | lc->sync_enter_timer = S390_lowcore.sync_enter_timer; |
347 | lc->async_enter_timer = S390_lowcore.async_enter_timer; | |
348 | lc->exit_timer = S390_lowcore.exit_timer; | |
349 | lc->user_timer = S390_lowcore.user_timer; | |
350 | lc->system_timer = S390_lowcore.system_timer; | |
351 | lc->steal_timer = S390_lowcore.steal_timer; | |
352 | lc->last_update_timer = S390_lowcore.last_update_timer; | |
353 | lc->last_update_clock = S390_lowcore.last_update_clock; | |
dfd9f7ab | 354 | lc->ftrace_func = S390_lowcore.ftrace_func; |
8b646bd7 MS |
355 | |
356 | restart_stack = __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0); | |
357 | restart_stack += ASYNC_SIZE; | |
358 | ||
359 | /* | |
360 | * Set up PSW restart to call ipl.c:do_restart(). Copy the relevant | |
b4a96015 | 361 | * restart data to the absolute zero lowcore. This is necessary if |
8b646bd7 MS |
362 | * PSW restart is done on an offline CPU that has lowcore zero. |
363 | */ | |
364 | lc->restart_stack = (unsigned long) restart_stack; | |
365 | lc->restart_fn = (unsigned long) do_restart; | |
366 | lc->restart_data = 0; | |
367 | lc->restart_source = -1UL; | |
73bf463e MH |
368 | |
369 | /* Setup absolute zero lowcore */ | |
fbe76568 HC |
370 | mem_assign_absolute(S390_lowcore.restart_stack, lc->restart_stack); |
371 | mem_assign_absolute(S390_lowcore.restart_fn, lc->restart_fn); | |
372 | mem_assign_absolute(S390_lowcore.restart_data, lc->restart_data); | |
373 | mem_assign_absolute(S390_lowcore.restart_source, lc->restart_source); | |
374 | mem_assign_absolute(S390_lowcore.restart_psw, lc->restart_psw); | |
8b646bd7 | 375 | |
c9e37353 | 376 | set_prefix((u32)(unsigned long) lc); |
099b7651 | 377 | lowcore_ptr[0] = lc; |
c9e37353 HC |
378 | } |
379 | ||
71189284 HC |
380 | static struct resource code_resource = { |
381 | .name = "Kernel code", | |
382 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
383 | }; | |
384 | ||
385 | static struct resource data_resource = { | |
386 | .name = "Kernel data", | |
387 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
388 | }; | |
389 | ||
4cc69531 HC |
390 | static struct resource bss_resource = { |
391 | .name = "Kernel bss", | |
392 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
393 | }; | |
394 | ||
71189284 HC |
395 | static struct resource __initdata *standard_resources[] = { |
396 | &code_resource, | |
397 | &data_resource, | |
4cc69531 | 398 | &bss_resource, |
71189284 HC |
399 | }; |
400 | ||
401 | static void __init setup_resources(void) | |
c9e37353 | 402 | { |
71189284 HC |
403 | struct resource *res, *std_res, *sub_res; |
404 | int i, j; | |
c9e37353 | 405 | |
cc13ad62 HC |
406 | code_resource.start = (unsigned long) &_text; |
407 | code_resource.end = (unsigned long) &_etext - 1; | |
408 | data_resource.start = (unsigned long) &_etext; | |
409 | data_resource.end = (unsigned long) &_edata - 1; | |
4cc69531 HC |
410 | bss_resource.start = (unsigned long) &__bss_start; |
411 | bss_resource.end = (unsigned long) &__bss_stop - 1; | |
cc13ad62 | 412 | |
9f4b0ba8 HC |
413 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
414 | if (!memory_chunk[i].size) | |
415 | continue; | |
71189284 | 416 | res = alloc_bootmem_low(sizeof(*res)); |
c9e37353 HC |
417 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; |
418 | switch (memory_chunk[i].type) { | |
419 | case CHUNK_READ_WRITE: | |
420 | res->name = "System RAM"; | |
421 | break; | |
422 | case CHUNK_READ_ONLY: | |
423 | res->name = "System ROM"; | |
424 | res->flags |= IORESOURCE_READONLY; | |
425 | break; | |
426 | default: | |
427 | res->name = "reserved"; | |
428 | } | |
429 | res->start = memory_chunk[i].addr; | |
71189284 | 430 | res->end = res->start + memory_chunk[i].size - 1; |
c9e37353 | 431 | request_resource(&iomem_resource, res); |
fe355b7f | 432 | |
71189284 HC |
433 | for (j = 0; j < ARRAY_SIZE(standard_resources); j++) { |
434 | std_res = standard_resources[j]; | |
435 | if (std_res->start < res->start || | |
436 | std_res->start > res->end) | |
437 | continue; | |
438 | if (std_res->end > res->end) { | |
439 | sub_res = alloc_bootmem_low(sizeof(*sub_res)); | |
440 | *sub_res = *std_res; | |
441 | sub_res->end = res->end; | |
442 | std_res->start = res->end + 1; | |
443 | request_resource(res, sub_res); | |
444 | } else { | |
445 | request_resource(res, std_res); | |
446 | } | |
fe355b7f | 447 | } |
c9e37353 HC |
448 | } |
449 | } | |
450 | ||
8b62bc96 HC |
451 | static void __init setup_memory_end(void) |
452 | { | |
14045ebf | 453 | unsigned long vmax, vmalloc_size, tmp; |
118131a2 | 454 | unsigned long real_memory_size = 0; |
8b62bc96 HC |
455 | int i; |
456 | ||
60a0c68d | 457 | |
59f2e69d | 458 | #ifdef CONFIG_ZFCPDUMP |
e657d8fe MH |
459 | if (ipl_info.type == IPL_TYPE_FCP_DUMP && |
460 | !OLDMEM_BASE && sclp_get_hsa_size()) { | |
461 | memory_end = sclp_get_hsa_size(); | |
23d75d9c HC |
462 | memory_end_set = 1; |
463 | } | |
411ed322 | 464 | #endif |
8b62bc96 HC |
465 | memory_end &= PAGE_MASK; |
466 | ||
9f4b0ba8 HC |
467 | /* |
468 | * Make sure all chunks are MAX_ORDER aligned so we don't need the | |
469 | * extra checks that HOLES_IN_ZONE would require. | |
470 | */ | |
471 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
472 | unsigned long start, end; | |
473 | struct mem_chunk *chunk; | |
474 | unsigned long align; | |
475 | ||
476 | chunk = &memory_chunk[i]; | |
996b4a7d | 477 | if (!chunk->size) |
67b5c3ee | 478 | continue; |
9f4b0ba8 HC |
479 | align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); |
480 | start = (chunk->addr + align - 1) & ~(align - 1); | |
481 | end = (chunk->addr + chunk->size) & ~(align - 1); | |
482 | if (start >= end) | |
483 | memset(chunk, 0, sizeof(*chunk)); | |
484 | else { | |
485 | chunk->addr = start; | |
486 | chunk->size = end - start; | |
487 | } | |
14045ebf MS |
488 | real_memory_size = max(real_memory_size, |
489 | chunk->addr + chunk->size); | |
9f4b0ba8 HC |
490 | } |
491 | ||
14045ebf MS |
492 | /* Choose kernel address space layout: 2, 3, or 4 levels. */ |
493 | #ifdef CONFIG_64BIT | |
c972cc60 | 494 | vmalloc_size = VMALLOC_END ?: (128UL << 30) - MODULES_LEN; |
14045ebf MS |
495 | tmp = (memory_end ?: real_memory_size) / PAGE_SIZE; |
496 | tmp = tmp * (sizeof(struct page) + PAGE_SIZE) + vmalloc_size; | |
497 | if (tmp <= (1UL << 42)) | |
498 | vmax = 1UL << 42; /* 3-level kernel page table */ | |
499 | else | |
500 | vmax = 1UL << 53; /* 4-level kernel page table */ | |
c972cc60 HC |
501 | /* module area is at the end of the kernel address space. */ |
502 | MODULES_END = vmax; | |
503 | MODULES_VADDR = MODULES_END - MODULES_LEN; | |
504 | VMALLOC_END = MODULES_VADDR; | |
14045ebf MS |
505 | #else |
506 | vmalloc_size = VMALLOC_END ?: 96UL << 20; | |
507 | vmax = 1UL << 31; /* 2-level kernel page table */ | |
14045ebf MS |
508 | /* vmalloc area is at the end of the kernel address space. */ |
509 | VMALLOC_END = vmax; | |
c972cc60 | 510 | #endif |
14045ebf MS |
511 | VMALLOC_START = vmax - vmalloc_size; |
512 | ||
513 | /* Split remaining virtual space between 1:1 mapping & vmemmap array */ | |
514 | tmp = VMALLOC_START / (PAGE_SIZE + sizeof(struct page)); | |
a7bb1ae7 HC |
515 | /* vmemmap contains a multiple of PAGES_PER_SECTION struct pages */ |
516 | tmp = SECTION_ALIGN_UP(tmp); | |
14045ebf MS |
517 | tmp = VMALLOC_START - tmp * sizeof(struct page); |
518 | tmp &= ~((vmax >> 11) - 1); /* align to page table level */ | |
519 | tmp = min(tmp, 1UL << MAX_PHYSMEM_BITS); | |
520 | vmemmap = (struct page *) tmp; | |
521 | ||
522 | /* Take care that memory_end is set and <= vmemmap */ | |
523 | memory_end = min(memory_end ?: real_memory_size, tmp); | |
524 | ||
525 | /* Fixup memory chunk array to fit into 0..memory_end */ | |
8b62bc96 HC |
526 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
527 | struct mem_chunk *chunk = &memory_chunk[i]; | |
528 | ||
996b4a7d | 529 | if (!chunk->size) |
67b5c3ee | 530 | continue; |
14045ebf | 531 | if (chunk->addr >= memory_end) { |
8b62bc96 HC |
532 | memset(chunk, 0, sizeof(*chunk)); |
533 | continue; | |
534 | } | |
14045ebf MS |
535 | if (chunk->addr + chunk->size > memory_end) |
536 | chunk->size = memory_end - chunk->addr; | |
8b62bc96 | 537 | } |
8b62bc96 HC |
538 | } |
539 | ||
d38593f9 MH |
540 | static void __init setup_vmcoreinfo(void) |
541 | { | |
fbe76568 | 542 | mem_assign_absolute(S390_lowcore.vmcore_info, paddr_vmcoreinfo_note()); |
d38593f9 MH |
543 | } |
544 | ||
60a0c68d MH |
545 | #ifdef CONFIG_CRASH_DUMP |
546 | ||
547 | /* | |
548 | * Find suitable location for crashkernel memory | |
549 | */ | |
550 | static unsigned long __init find_crash_base(unsigned long crash_size, | |
551 | char **msg) | |
552 | { | |
553 | unsigned long crash_base; | |
554 | struct mem_chunk *chunk; | |
555 | int i; | |
556 | ||
557 | if (memory_chunk[0].size < crash_size) { | |
558 | *msg = "first memory chunk must be at least crashkernel size"; | |
559 | return 0; | |
560 | } | |
5f894cbb | 561 | if (OLDMEM_BASE && crash_size == OLDMEM_SIZE) |
60a0c68d MH |
562 | return OLDMEM_BASE; |
563 | ||
564 | for (i = MEMORY_CHUNKS - 1; i >= 0; i--) { | |
565 | chunk = &memory_chunk[i]; | |
566 | if (chunk->size == 0) | |
567 | continue; | |
568 | if (chunk->type != CHUNK_READ_WRITE) | |
569 | continue; | |
570 | if (chunk->size < crash_size) | |
571 | continue; | |
572 | crash_base = (chunk->addr + chunk->size) - crash_size; | |
573 | if (crash_base < crash_size) | |
574 | continue; | |
e657d8fe | 575 | if (crash_base < sclp_get_hsa_size()) |
60a0c68d MH |
576 | continue; |
577 | if (crash_base < (unsigned long) INITRD_START + INITRD_SIZE) | |
578 | continue; | |
579 | return crash_base; | |
580 | } | |
581 | *msg = "no suitable area found"; | |
582 | return 0; | |
583 | } | |
584 | ||
585 | /* | |
586 | * Check if crash_base and crash_size is valid | |
587 | */ | |
588 | static int __init verify_crash_base(unsigned long crash_base, | |
589 | unsigned long crash_size, | |
590 | char **msg) | |
591 | { | |
592 | struct mem_chunk *chunk; | |
593 | int i; | |
594 | ||
595 | /* | |
596 | * Because we do the swap to zero, we must have at least 'crash_size' | |
597 | * bytes free space before crash_base | |
598 | */ | |
599 | if (crash_size > crash_base) { | |
600 | *msg = "crashkernel offset must be greater than size"; | |
601 | return -EINVAL; | |
602 | } | |
603 | ||
604 | /* First memory chunk must be at least crash_size */ | |
605 | if (memory_chunk[0].size < crash_size) { | |
606 | *msg = "first memory chunk must be at least crashkernel size"; | |
607 | return -EINVAL; | |
608 | } | |
609 | /* Check if we fit into the respective memory chunk */ | |
610 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
611 | chunk = &memory_chunk[i]; | |
612 | if (chunk->size == 0) | |
613 | continue; | |
614 | if (crash_base < chunk->addr) | |
615 | continue; | |
616 | if (crash_base >= chunk->addr + chunk->size) | |
617 | continue; | |
618 | /* we have found the memory chunk */ | |
619 | if (crash_base + crash_size > chunk->addr + chunk->size) { | |
620 | *msg = "selected memory chunk is too small for " | |
621 | "crashkernel memory"; | |
622 | return -EINVAL; | |
623 | } | |
624 | return 0; | |
625 | } | |
626 | *msg = "invalid memory range specified"; | |
627 | return -EINVAL; | |
628 | } | |
629 | ||
60a0c68d MH |
630 | /* |
631 | * When kdump is enabled, we have to ensure that no memory from | |
632 | * the area [0 - crashkernel memory size] and | |
633 | * [crashk_res.start - crashk_res.end] is set offline. | |
634 | */ | |
635 | static int kdump_mem_notifier(struct notifier_block *nb, | |
636 | unsigned long action, void *data) | |
637 | { | |
638 | struct memory_notify *arg = data; | |
639 | ||
640 | if (arg->start_pfn < PFN_DOWN(resource_size(&crashk_res))) | |
641 | return NOTIFY_BAD; | |
642 | if (arg->start_pfn > PFN_DOWN(crashk_res.end)) | |
643 | return NOTIFY_OK; | |
644 | if (arg->start_pfn + arg->nr_pages - 1 < PFN_DOWN(crashk_res.start)) | |
645 | return NOTIFY_OK; | |
646 | return NOTIFY_BAD; | |
647 | } | |
648 | ||
649 | static struct notifier_block kdump_mem_nb = { | |
650 | .notifier_call = kdump_mem_notifier, | |
651 | }; | |
652 | ||
653 | #endif | |
654 | ||
655 | /* | |
656 | * Make sure that oldmem, where the dump is stored, is protected | |
657 | */ | |
658 | static void reserve_oldmem(void) | |
659 | { | |
660 | #ifdef CONFIG_CRASH_DUMP | |
118131a2 HC |
661 | unsigned long real_size = 0; |
662 | int i; | |
663 | ||
60a0c68d MH |
664 | if (!OLDMEM_BASE) |
665 | return; | |
118131a2 HC |
666 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
667 | struct mem_chunk *chunk = &memory_chunk[i]; | |
60a0c68d | 668 | |
118131a2 HC |
669 | real_size = max(real_size, chunk->addr + chunk->size); |
670 | } | |
996b4a7d HC |
671 | create_mem_hole(memory_chunk, OLDMEM_BASE, OLDMEM_SIZE); |
672 | create_mem_hole(memory_chunk, OLDMEM_SIZE, real_size - OLDMEM_SIZE); | |
60a0c68d MH |
673 | #endif |
674 | } | |
675 | ||
676 | /* | |
677 | * Reserve memory for kdump kernel to be loaded with kexec | |
678 | */ | |
679 | static void __init reserve_crashkernel(void) | |
680 | { | |
681 | #ifdef CONFIG_CRASH_DUMP | |
682 | unsigned long long crash_base, crash_size; | |
4fdf7f43 | 683 | char *msg = NULL; |
60a0c68d MH |
684 | int rc; |
685 | ||
686 | rc = parse_crashkernel(boot_command_line, memory_end, &crash_size, | |
687 | &crash_base); | |
688 | if (rc || crash_size == 0) | |
689 | return; | |
dab7a7b1 MH |
690 | crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN); |
691 | crash_size = ALIGN(crash_size, KEXEC_CRASH_MEM_ALIGN); | |
60a0c68d MH |
692 | if (register_memory_notifier(&kdump_mem_nb)) |
693 | return; | |
694 | if (!crash_base) | |
695 | crash_base = find_crash_base(crash_size, &msg); | |
696 | if (!crash_base) { | |
697 | pr_info("crashkernel reservation failed: %s\n", msg); | |
698 | unregister_memory_notifier(&kdump_mem_nb); | |
699 | return; | |
700 | } | |
701 | if (verify_crash_base(crash_base, crash_size, &msg)) { | |
702 | pr_info("crashkernel reservation failed: %s\n", msg); | |
703 | unregister_memory_notifier(&kdump_mem_nb); | |
704 | return; | |
705 | } | |
706 | if (!OLDMEM_BASE && MACHINE_IS_VM) | |
707 | diag10_range(PFN_DOWN(crash_base), PFN_DOWN(crash_size)); | |
708 | crashk_res.start = crash_base; | |
709 | crashk_res.end = crash_base + crash_size - 1; | |
710 | insert_resource(&iomem_resource, &crashk_res); | |
996b4a7d | 711 | create_mem_hole(memory_chunk, crash_base, crash_size); |
60a0c68d MH |
712 | pr_info("Reserving %lluMB of memory at %lluMB " |
713 | "for crashkernel (System RAM: %luMB)\n", | |
714 | crash_size >> 20, crash_base >> 20, memory_end >> 20); | |
4857d4bb | 715 | os_info_crashkernel_add(crash_base, crash_size); |
60a0c68d MH |
716 | #endif |
717 | } | |
718 | ||
8b646bd7 | 719 | static void __init setup_memory(void) |
c9e37353 HC |
720 | { |
721 | unsigned long bootmap_size; | |
fe355b7f | 722 | unsigned long start_pfn, end_pfn; |
c9e37353 | 723 | int i; |
1da177e4 LT |
724 | |
725 | /* | |
726 | * partially used pages are not usable - thus | |
727 | * we are rounding upwards: | |
728 | */ | |
65912a84 HC |
729 | start_pfn = PFN_UP(__pa(&_end)); |
730 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 731 | |
65912a84 HC |
732 | #ifdef CONFIG_BLK_DEV_INITRD |
733 | /* | |
734 | * Move the initrd in case the bitmap of the bootmem allocater | |
735 | * would overwrite it. | |
736 | */ | |
737 | ||
738 | if (INITRD_START && INITRD_SIZE) { | |
739 | unsigned long bmap_size; | |
740 | unsigned long start; | |
741 | ||
742 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
743 | bmap_size = PFN_PHYS(bmap_size); | |
744 | ||
745 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
746 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
747 | ||
60a0c68d MH |
748 | #ifdef CONFIG_CRASH_DUMP |
749 | if (OLDMEM_BASE) { | |
750 | /* Move initrd behind kdump oldmem */ | |
751 | if (start + INITRD_SIZE > OLDMEM_BASE && | |
752 | start < OLDMEM_BASE + OLDMEM_SIZE) | |
753 | start = OLDMEM_BASE + OLDMEM_SIZE; | |
754 | } | |
755 | #endif | |
65912a84 | 756 | if (start + INITRD_SIZE > memory_end) { |
3b6ed4ab MS |
757 | pr_err("initrd extends beyond end of " |
758 | "memory (0x%08lx > 0x%08lx) " | |
65912a84 HC |
759 | "disabling initrd\n", |
760 | start + INITRD_SIZE, memory_end); | |
761 | INITRD_START = INITRD_SIZE = 0; | |
762 | } else { | |
3b6ed4ab MS |
763 | pr_info("Moving initrd (0x%08lx -> " |
764 | "0x%08lx, size: %ld)\n", | |
765 | INITRD_START, start, INITRD_SIZE); | |
65912a84 HC |
766 | memmove((void *) start, (void *) INITRD_START, |
767 | INITRD_SIZE); | |
768 | INITRD_START = start; | |
769 | } | |
770 | } | |
771 | } | |
772 | #endif | |
773 | ||
1da177e4 | 774 | /* |
7676bef9 | 775 | * Initialize the boot-time allocator |
1da177e4 LT |
776 | */ |
777 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
778 | ||
779 | /* | |
780 | * Register RAM areas with the bootmem allocator. | |
781 | */ | |
c9e37353 | 782 | |
996b4a7d | 783 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
39b742f9 | 784 | unsigned long start_chunk, end_chunk, pfn; |
1da177e4 | 785 | |
996b4a7d | 786 | if (!memory_chunk[i].size) |
1da177e4 | 787 | continue; |
39b742f9 | 788 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
fb2e7c5e | 789 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |
39b742f9 HC |
790 | end_chunk = min(end_chunk, end_pfn); |
791 | if (start_chunk >= end_chunk) | |
792 | continue; | |
ff38df37 TH |
793 | memblock_add_node(PFN_PHYS(start_chunk), |
794 | PFN_PHYS(end_chunk - start_chunk), 0); | |
39b742f9 | 795 | pfn = max(start_chunk, start_pfn); |
6b70a920 | 796 | storage_key_init_range(PFN_PHYS(pfn), PFN_PHYS(end_chunk)); |
1da177e4 LT |
797 | } |
798 | ||
0b642ede PO |
799 | psw_set_key(PAGE_DEFAULT_KEY); |
800 | ||
39b742f9 | 801 | free_bootmem_with_active_regions(0, max_pfn); |
c9e37353 | 802 | |
615b04b3 HC |
803 | /* |
804 | * Reserve memory used for lowcore/command line/kernel image. | |
805 | */ | |
72a7fe39 | 806 | reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
615b04b3 | 807 | reserve_bootmem((unsigned long)_stext, |
72a7fe39 BW |
808 | PFN_PHYS(start_pfn) - (unsigned long)_stext, |
809 | BOOTMEM_DEFAULT); | |
c9e37353 HC |
810 | /* |
811 | * Reserve the bootmem bitmap itself as well. We do this in two | |
812 | * steps (first step was init_bootmem()) because this catches | |
813 | * the (very unlikely) case of us accidentally initializing the | |
814 | * bootmem allocator with an invalid RAM area. | |
815 | */ | |
72a7fe39 BW |
816 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, |
817 | BOOTMEM_DEFAULT); | |
1da177e4 | 818 | |
60a0c68d MH |
819 | #ifdef CONFIG_CRASH_DUMP |
820 | if (crashk_res.start) | |
821 | reserve_bootmem(crashk_res.start, | |
822 | crashk_res.end - crashk_res.start + 1, | |
823 | BOOTMEM_DEFAULT); | |
824 | if (is_kdump_kernel()) | |
825 | reserve_bootmem(elfcorehdr_addr - OLDMEM_BASE, | |
826 | PAGE_ALIGN(elfcorehdr_size), BOOTMEM_DEFAULT); | |
827 | #endif | |
1da177e4 | 828 | #ifdef CONFIG_BLK_DEV_INITRD |
65912a84 | 829 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 | 830 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
72a7fe39 BW |
831 | reserve_bootmem(INITRD_START, INITRD_SIZE, |
832 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
833 | initrd_start = INITRD_START; |
834 | initrd_end = initrd_start + INITRD_SIZE; | |
835 | } else { | |
3b6ed4ab MS |
836 | pr_err("initrd extends beyond end of " |
837 | "memory (0x%08lx > 0x%08lx) " | |
838 | "disabling initrd\n", | |
c9e37353 HC |
839 | initrd_start + INITRD_SIZE, memory_end); |
840 | initrd_start = initrd_end = 0; | |
1da177e4 | 841 | } |
c9e37353 | 842 | } |
1da177e4 | 843 | #endif |
c9e37353 | 844 | } |
1da177e4 | 845 | |
cf8ba7a9 MS |
846 | /* |
847 | * Setup hardware capabilities. | |
848 | */ | |
849 | static void __init setup_hwcaps(void) | |
850 | { | |
851 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; | |
94038a99 | 852 | struct cpuid cpu_id; |
cf8ba7a9 MS |
853 | int i; |
854 | ||
cf8ba7a9 MS |
855 | /* |
856 | * The store facility list bits numbers as found in the principles | |
857 | * of operation are numbered with bit 1UL<<31 as number 0 to | |
858 | * bit 1UL<<0 as number 31. | |
859 | * Bit 0: instructions named N3, "backported" to esa-mode | |
860 | * Bit 2: z/Architecture mode is active | |
861 | * Bit 7: the store-facility-list-extended facility is installed | |
862 | * Bit 17: the message-security assist is installed | |
863 | * Bit 19: the long-displacement facility is installed | |
864 | * Bit 21: the extended-immediate facility is installed | |
488253ce AK |
865 | * Bit 22: extended-translation facility 3 is installed |
866 | * Bit 30: extended-translation facility 3 enhancement facility | |
cf8ba7a9 MS |
867 | * These get translated to: |
868 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, | |
869 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, | |
488253ce AK |
870 | * HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and |
871 | * HWCAP_S390_ETF3EH bit 8 (22 && 30). | |
cf8ba7a9 MS |
872 | */ |
873 | for (i = 0; i < 6; i++) | |
14375bc4 | 874 | if (test_facility(stfl_bits[i])) |
cf8ba7a9 MS |
875 | elf_hwcap |= 1UL << i; |
876 | ||
14375bc4 | 877 | if (test_facility(22) && test_facility(30)) |
ea2a4d3a | 878 | elf_hwcap |= HWCAP_S390_ETF3EH; |
488253ce | 879 | |
cf8ba7a9 MS |
880 | /* |
881 | * Check for additional facilities with store-facility-list-extended. | |
882 | * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 | |
883 | * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information | |
884 | * as stored by stfl, bits 32-xxx contain additional facilities. | |
885 | * How many facility words are stored depends on the number of | |
25985edc | 886 | * doublewords passed to the instruction. The additional facilities |
cf8ba7a9 | 887 | * are: |
2ac3307f CE |
888 | * Bit 42: decimal floating point facility is installed |
889 | * Bit 44: perform floating point operation facility is installed | |
cf8ba7a9 | 890 | * translated to: |
488253ce | 891 | * HWCAP_S390_DFP bit 6 (42 && 44). |
cf8ba7a9 | 892 | */ |
14375bc4 MS |
893 | if ((elf_hwcap & (1UL << 2)) && test_facility(42) && test_facility(44)) |
894 | elf_hwcap |= HWCAP_S390_DFP; | |
cf8ba7a9 | 895 | |
ea2a4d3a HC |
896 | /* |
897 | * Huge page support HWCAP_S390_HPAGE is bit 7. | |
898 | */ | |
53492b1d | 899 | if (MACHINE_HAS_HPAGE) |
ea2a4d3a HC |
900 | elf_hwcap |= HWCAP_S390_HPAGE; |
901 | ||
db2e1f43 | 902 | #if defined(CONFIG_64BIT) |
ea2a4d3a HC |
903 | /* |
904 | * 64-bit register support for 31-bit processes | |
905 | * HWCAP_S390_HIGH_GPRS is bit 9. | |
906 | */ | |
907 | elf_hwcap |= HWCAP_S390_HIGH_GPRS; | |
d35339a4 MS |
908 | |
909 | /* | |
910 | * Transactional execution support HWCAP_S390_TE is bit 10. | |
911 | */ | |
912 | if (test_facility(50) && test_facility(73)) | |
913 | elf_hwcap |= HWCAP_S390_TE; | |
db2e1f43 | 914 | #endif |
53492b1d | 915 | |
94038a99 MS |
916 | get_cpu_id(&cpu_id); |
917 | switch (cpu_id.machine) { | |
cf8ba7a9 MS |
918 | case 0x9672: |
919 | #if !defined(CONFIG_64BIT) | |
920 | default: /* Use "g5" as default for 31 bit kernels. */ | |
921 | #endif | |
922 | strcpy(elf_platform, "g5"); | |
923 | break; | |
924 | case 0x2064: | |
925 | case 0x2066: | |
926 | #if defined(CONFIG_64BIT) | |
927 | default: /* Use "z900" as default for 64 bit kernels. */ | |
928 | #endif | |
929 | strcpy(elf_platform, "z900"); | |
930 | break; | |
931 | case 0x2084: | |
932 | case 0x2086: | |
933 | strcpy(elf_platform, "z990"); | |
934 | break; | |
935 | case 0x2094: | |
9fee8db2 | 936 | case 0x2096: |
cf8ba7a9 MS |
937 | strcpy(elf_platform, "z9-109"); |
938 | break; | |
9fee8db2 MS |
939 | case 0x2097: |
940 | case 0x2098: | |
941 | strcpy(elf_platform, "z10"); | |
942 | break; | |
c84b9051 | 943 | case 0x2817: |
3a81b171 | 944 | case 0x2818: |
c84b9051 HC |
945 | strcpy(elf_platform, "z196"); |
946 | break; | |
991c1505 | 947 | case 0x2827: |
59471227 | 948 | case 0x2828: |
991c1505 HC |
949 | strcpy(elf_platform, "zEC12"); |
950 | break; | |
cf8ba7a9 MS |
951 | } |
952 | } | |
953 | ||
c9e37353 HC |
954 | /* |
955 | * Setup function called from init/main.c just after the banner | |
956 | * was printed. | |
957 | */ | |
1da177e4 | 958 | |
8b646bd7 | 959 | void __init setup_arch(char **cmdline_p) |
c9e37353 | 960 | { |
1da177e4 | 961 | /* |
c9e37353 | 962 | * print what head.S has found out about the machine |
1da177e4 | 963 | */ |
347a8dc3 | 964 | #ifndef CONFIG_64BIT |
3b6ed4ab MS |
965 | if (MACHINE_IS_VM) |
966 | pr_info("Linux is running as a z/VM " | |
967 | "guest operating system in 31-bit mode\n"); | |
27d71602 | 968 | else if (MACHINE_IS_LPAR) |
3b6ed4ab MS |
969 | pr_info("Linux is running natively in 31-bit mode\n"); |
970 | if (MACHINE_HAS_IEEE) | |
971 | pr_info("The hardware system has IEEE compatible " | |
972 | "floating point units\n"); | |
973 | else | |
974 | pr_info("The hardware system has no IEEE compatible " | |
975 | "floating point units\n"); | |
347a8dc3 | 976 | #else /* CONFIG_64BIT */ |
fa587743 | 977 | if (MACHINE_IS_VM) |
3b6ed4ab MS |
978 | pr_info("Linux is running as a z/VM " |
979 | "guest operating system in 64-bit mode\n"); | |
637952ca | 980 | else if (MACHINE_IS_KVM) |
3b6ed4ab | 981 | pr_info("Linux is running under KVM in 64-bit mode\n"); |
27d71602 | 982 | else if (MACHINE_IS_LPAR) |
3b6ed4ab | 983 | pr_info("Linux is running natively in 64-bit mode\n"); |
347a8dc3 | 984 | #endif /* CONFIG_64BIT */ |
c9e37353 | 985 | |
a0443fbb HB |
986 | /* Have one command line that is parsed and saved in /proc/cmdline */ |
987 | /* boot_command_line has been already set up in early.c */ | |
988 | *cmdline_p = boot_command_line; | |
59685296 | 989 | |
c9e37353 | 990 | ROOT_DEV = Root_RAM0; |
59685296 HC |
991 | |
992 | init_mm.start_code = PAGE_OFFSET; | |
993 | init_mm.end_code = (unsigned long) &_etext; | |
994 | init_mm.end_data = (unsigned long) &_edata; | |
995 | init_mm.brk = (unsigned long) &_end; | |
996 | ||
59685296 | 997 | parse_early_param(); |
df1bd59c | 998 | detect_memory_layout(memory_chunk, memory_end); |
4857d4bb | 999 | os_info_init(); |
99ca4e58 | 1000 | setup_ipl(); |
67b5c3ee | 1001 | reserve_oldmem(); |
8b62bc96 | 1002 | setup_memory_end(); |
60a0c68d | 1003 | reserve_crashkernel(); |
c9e37353 HC |
1004 | setup_memory(); |
1005 | setup_resources(); | |
d38593f9 | 1006 | setup_vmcoreinfo(); |
c9e37353 HC |
1007 | setup_lowcore(); |
1008 | ||
d80512f8 | 1009 | smp_fill_possible_mask(); |
1da177e4 | 1010 | cpu_init(); |
dbd70fb4 | 1011 | s390_init_cpu_topology(); |
1da177e4 | 1012 | |
cf8ba7a9 MS |
1013 | /* |
1014 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). | |
1015 | */ | |
1016 | setup_hwcaps(); | |
1017 | ||
1da177e4 LT |
1018 | /* |
1019 | * Create kernel page tables and switch to virtual addressing. | |
1020 | */ | |
1021 | paging_init(); | |
1022 | ||
1023 | /* Setup default console */ | |
1024 | conmode_default(); | |
637952ca | 1025 | set_preferred_console(); |
411ed322 MH |
1026 | |
1027 | /* Setup zfcpdump support */ | |
fe72ffba | 1028 | setup_zfcpdump(); |
1da177e4 | 1029 | } |