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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * arch/s390/kernel/setup.c | |
3 | * | |
4 | * S390 version | |
cd3b70f5 | 5 | * Copyright (C) IBM Corp. 1999,2010 |
1da177e4 LT |
6 | * Author(s): Hartmut Penner (hp@de.ibm.com), |
7 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
8 | * | |
9 | * Derived from "arch/i386/kernel/setup.c" | |
10 | * Copyright (C) 1995, Linus Torvalds | |
11 | */ | |
12 | ||
13 | /* | |
14 | * This file handles the architecture-dependent parts of initialization | |
15 | */ | |
16 | ||
3b6ed4ab MS |
17 | #define KMSG_COMPONENT "setup" |
18 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
19 | ||
1da177e4 LT |
20 | #include <linux/errno.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/stddef.h> | |
26 | #include <linux/unistd.h> | |
27 | #include <linux/ptrace.h> | |
1da177e4 | 28 | #include <linux/user.h> |
1da177e4 LT |
29 | #include <linux/tty.h> |
30 | #include <linux/ioport.h> | |
31 | #include <linux/delay.h> | |
1da177e4 LT |
32 | #include <linux/init.h> |
33 | #include <linux/initrd.h> | |
34 | #include <linux/bootmem.h> | |
35 | #include <linux/root_dev.h> | |
36 | #include <linux/console.h> | |
1da177e4 | 37 | #include <linux/kernel_stat.h> |
1e8e3383 | 38 | #include <linux/device.h> |
585c3047 | 39 | #include <linux/notifier.h> |
65912a84 | 40 | #include <linux/pfn.h> |
fe355b7f | 41 | #include <linux/ctype.h> |
2b67fc46 | 42 | #include <linux/reboot.h> |
dbd70fb4 | 43 | #include <linux/topology.h> |
dfd9f7ab | 44 | #include <linux/ftrace.h> |
1da177e4 | 45 | |
46b05d26 | 46 | #include <asm/ipl.h> |
1da177e4 LT |
47 | #include <asm/uaccess.h> |
48 | #include <asm/system.h> | |
49 | #include <asm/smp.h> | |
50 | #include <asm/mmu_context.h> | |
51 | #include <asm/cpcmd.h> | |
52 | #include <asm/lowcore.h> | |
53 | #include <asm/irq.h> | |
0b642ede PO |
54 | #include <asm/page.h> |
55 | #include <asm/ptrace.h> | |
cc13ad62 | 56 | #include <asm/sections.h> |
fe355b7f | 57 | #include <asm/ebcdic.h> |
c1821c2e | 58 | #include <asm/compat.h> |
faeba830 | 59 | #include <asm/kvm_virtio.h> |
c1821c2e GS |
60 | |
61 | long psw_kernel_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | | |
62 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY); | |
63 | long psw_user_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | | |
64 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
65 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY); | |
1da177e4 | 66 | |
d02765d1 GS |
67 | /* |
68 | * User copy operations. | |
69 | */ | |
70 | struct uaccess_ops uaccess; | |
d4ee453b | 71 | EXPORT_SYMBOL(uaccess); |
d02765d1 | 72 | |
1da177e4 LT |
73 | /* |
74 | * Machine setup.. | |
75 | */ | |
76 | unsigned int console_mode = 0; | |
1485c5c8 HC |
77 | EXPORT_SYMBOL(console_mode); |
78 | ||
1da177e4 | 79 | unsigned int console_devno = -1; |
1485c5c8 HC |
80 | EXPORT_SYMBOL(console_devno); |
81 | ||
1da177e4 | 82 | unsigned int console_irq = -1; |
1485c5c8 HC |
83 | EXPORT_SYMBOL(console_irq); |
84 | ||
cf8ba7a9 MS |
85 | unsigned long elf_hwcap = 0; |
86 | char elf_platform[ELF_PLATFORM_SIZE]; | |
36a2bd42 | 87 | |
23d17421 | 88 | struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
23d75d9c HC |
89 | |
90 | int __initdata memory_end_set; | |
91 | unsigned long __initdata memory_end; | |
1da177e4 | 92 | |
099b7651 FM |
93 | /* An array with a pointer to the lowcore of every CPU. */ |
94 | struct _lowcore *lowcore_ptr[NR_CPUS]; | |
95 | EXPORT_SYMBOL(lowcore_ptr); | |
96 | ||
1da177e4 LT |
97 | /* |
98 | * This is set up by the setup-routine at boot-time | |
99 | * for S390 need to find out, what we have to setup | |
100 | * using address 0x10400 ... | |
101 | */ | |
102 | ||
103 | #include <asm/setup.h> | |
104 | ||
1da177e4 LT |
105 | /* |
106 | * condev= and conmode= setup parameter. | |
107 | */ | |
108 | ||
109 | static int __init condev_setup(char *str) | |
110 | { | |
111 | int vdev; | |
112 | ||
113 | vdev = simple_strtoul(str, &str, 0); | |
114 | if (vdev >= 0 && vdev < 65536) { | |
115 | console_devno = vdev; | |
116 | console_irq = -1; | |
117 | } | |
118 | return 1; | |
119 | } | |
120 | ||
121 | __setup("condev=", condev_setup); | |
122 | ||
637952ca HB |
123 | static void __init set_preferred_console(void) |
124 | { | |
c4de0c1a | 125 | if (MACHINE_IS_KVM) |
637952ca | 126 | add_preferred_console("hvc", 0, NULL); |
c4de0c1a | 127 | else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) |
637952ca | 128 | add_preferred_console("ttyS", 0, NULL); |
c4de0c1a | 129 | else if (CONSOLE_IS_3270) |
637952ca HB |
130 | add_preferred_console("tty3270", 0, NULL); |
131 | } | |
132 | ||
1da177e4 LT |
133 | static int __init conmode_setup(char *str) |
134 | { | |
8c0933ee | 135 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
136 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) |
137 | SET_CONSOLE_SCLP; | |
138 | #endif | |
139 | #if defined(CONFIG_TN3215_CONSOLE) | |
140 | if (strncmp(str, "3215", 5) == 0) | |
141 | SET_CONSOLE_3215; | |
142 | #endif | |
143 | #if defined(CONFIG_TN3270_CONSOLE) | |
144 | if (strncmp(str, "3270", 5) == 0) | |
145 | SET_CONSOLE_3270; | |
146 | #endif | |
637952ca | 147 | set_preferred_console(); |
1da177e4 LT |
148 | return 1; |
149 | } | |
150 | ||
151 | __setup("conmode=", conmode_setup); | |
152 | ||
153 | static void __init conmode_default(void) | |
154 | { | |
155 | char query_buffer[1024]; | |
156 | char *ptr; | |
157 | ||
158 | if (MACHINE_IS_VM) { | |
740b5706 | 159 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
160 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
161 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
162 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
740b5706 | 163 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
164 | ptr = strstr(query_buffer, "CONMODE"); |
165 | /* | |
166 | * Set the conmode to 3215 so that the device recognition | |
167 | * will set the cu_type of the console to 3215. If the | |
168 | * conmode is 3270 and we don't set it back then both | |
169 | * 3215 and the 3270 driver will try to access the console | |
170 | * device (3215 as console and 3270 as normal tty). | |
171 | */ | |
740b5706 | 172 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 | 173 | if (ptr == NULL) { |
8c0933ee | 174 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
175 | SET_CONSOLE_SCLP; |
176 | #endif | |
177 | return; | |
178 | } | |
179 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
180 | #if defined(CONFIG_TN3270_CONSOLE) | |
181 | SET_CONSOLE_3270; | |
182 | #elif defined(CONFIG_TN3215_CONSOLE) | |
183 | SET_CONSOLE_3215; | |
8c0933ee | 184 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
185 | SET_CONSOLE_SCLP; |
186 | #endif | |
187 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
188 | #if defined(CONFIG_TN3215_CONSOLE) | |
189 | SET_CONSOLE_3215; | |
190 | #elif defined(CONFIG_TN3270_CONSOLE) | |
191 | SET_CONSOLE_3270; | |
8c0933ee | 192 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
193 | SET_CONSOLE_SCLP; |
194 | #endif | |
195 | } | |
1da177e4 | 196 | } else { |
8c0933ee | 197 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
198 | SET_CONSOLE_SCLP; |
199 | #endif | |
200 | } | |
201 | } | |
202 | ||
59f2e69d | 203 | #ifdef CONFIG_ZFCPDUMP |
411ed322 MH |
204 | static void __init setup_zfcpdump(unsigned int console_devno) |
205 | { | |
a0443fbb | 206 | static char str[41]; |
411ed322 MH |
207 | |
208 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) | |
209 | return; | |
210 | if (console_devno != -1) | |
a0443fbb | 211 | sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x", |
411ed322 MH |
212 | ipl_info.data.fcp.dev_id.devno, console_devno); |
213 | else | |
a0443fbb | 214 | sprintf(str, " cio_ignore=all,!0.0.%04x", |
411ed322 | 215 | ipl_info.data.fcp.dev_id.devno); |
a0443fbb | 216 | strcat(boot_command_line, str); |
411ed322 MH |
217 | console_loglevel = 2; |
218 | } | |
219 | #else | |
220 | static inline void setup_zfcpdump(unsigned int console_devno) {} | |
221 | #endif /* CONFIG_ZFCPDUMP */ | |
222 | ||
1da177e4 LT |
223 | /* |
224 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
225 | * _machine_halt or _machine_power_off. | |
226 | */ | |
227 | ||
228 | void machine_restart(char *command) | |
229 | { | |
7aa8dac7 | 230 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
06fa46a2 MS |
231 | /* |
232 | * Only unblank the console if we are called in enabled | |
233 | * context or a bust_spinlocks cleared the way for us. | |
234 | */ | |
235 | console_unblank(); | |
1da177e4 LT |
236 | _machine_restart(command); |
237 | } | |
238 | ||
1da177e4 LT |
239 | void machine_halt(void) |
240 | { | |
06fa46a2 MS |
241 | if (!in_interrupt() || oops_in_progress) |
242 | /* | |
243 | * Only unblank the console if we are called in enabled | |
244 | * context or a bust_spinlocks cleared the way for us. | |
245 | */ | |
246 | console_unblank(); | |
1da177e4 LT |
247 | _machine_halt(); |
248 | } | |
249 | ||
1da177e4 LT |
250 | void machine_power_off(void) |
251 | { | |
06fa46a2 MS |
252 | if (!in_interrupt() || oops_in_progress) |
253 | /* | |
254 | * Only unblank the console if we are called in enabled | |
255 | * context or a bust_spinlocks cleared the way for us. | |
256 | */ | |
257 | console_unblank(); | |
1da177e4 LT |
258 | _machine_power_off(); |
259 | } | |
260 | ||
53df751c MS |
261 | /* |
262 | * Dummy power off function. | |
263 | */ | |
264 | void (*pm_power_off)(void) = machine_power_off; | |
265 | ||
59685296 HC |
266 | static int __init early_parse_mem(char *p) |
267 | { | |
268 | memory_end = memparse(p, &p); | |
23d75d9c | 269 | memory_end_set = 1; |
59685296 HC |
270 | return 0; |
271 | } | |
272 | early_param("mem", early_parse_mem); | |
273 | ||
b11b5334 MS |
274 | unsigned int user_mode = HOME_SPACE_MODE; |
275 | EXPORT_SYMBOL_GPL(user_mode); | |
c1821c2e | 276 | |
3b6ed4ab MS |
277 | static int set_amode_and_uaccess(unsigned long user_amode, |
278 | unsigned long user32_amode) | |
c1821c2e GS |
279 | { |
280 | psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode | | |
281 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
282 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
283 | #ifdef CONFIG_COMPAT | |
284 | psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode | | |
285 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
286 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
287 | psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode | | |
288 | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | | |
289 | PSW32_MASK_PSTATE; | |
290 | #endif | |
291 | psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | | |
292 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY; | |
293 | ||
294 | if (MACHINE_HAS_MVCOS) { | |
c1821c2e | 295 | memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); |
3b6ed4ab | 296 | return 1; |
c1821c2e | 297 | } else { |
c1821c2e | 298 | memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); |
3b6ed4ab | 299 | return 0; |
c1821c2e GS |
300 | } |
301 | } | |
302 | ||
303 | /* | |
304 | * Switch kernel/user addressing modes? | |
305 | */ | |
306 | static int __init early_parse_switch_amode(char *p) | |
307 | { | |
043d0708 | 308 | user_mode = PRIMARY_SPACE_MODE; |
c1821c2e GS |
309 | return 0; |
310 | } | |
311 | early_param("switch_amode", early_parse_switch_amode); | |
312 | ||
b11b5334 | 313 | static int __init early_parse_user_mode(char *p) |
c1821c2e | 314 | { |
b11b5334 MS |
315 | if (p && strcmp(p, "primary") == 0) |
316 | user_mode = PRIMARY_SPACE_MODE; | |
b11b5334 MS |
317 | else if (!p || strcmp(p, "home") == 0) |
318 | user_mode = HOME_SPACE_MODE; | |
319 | else | |
320 | return 1; | |
3b6ed4ab | 321 | return 0; |
c1821c2e | 322 | } |
b11b5334 | 323 | early_param("user_mode", early_parse_user_mode); |
c1821c2e | 324 | |
c1821c2e GS |
325 | static void setup_addressing_mode(void) |
326 | { | |
043d0708 | 327 | if (user_mode == PRIMARY_SPACE_MODE) { |
3b6ed4ab MS |
328 | if (set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY)) |
329 | pr_info("Address spaces switched, " | |
330 | "mvcos available\n"); | |
331 | else | |
332 | pr_info("Address spaces switched, " | |
333 | "mvcos not available\n"); | |
c1821c2e GS |
334 | } |
335 | } | |
336 | ||
c9e37353 HC |
337 | static void __init |
338 | setup_lowcore(void) | |
339 | { | |
340 | struct _lowcore *lc; | |
c9e37353 HC |
341 | |
342 | /* | |
343 | * Setup lowcore for boot cpu | |
344 | */ | |
cbb870c8 | 345 | BUILD_BUG_ON(sizeof(struct _lowcore) != LC_PAGES * 4096); |
a0878656 | 346 | lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0); |
0b642ede | 347 | lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; |
c9e37353 | 348 | lc->restart_psw.addr = |
7dd6b334 | 349 | PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler; |
b11b5334 | 350 | if (user_mode != HOME_SPACE_MODE) |
c1821c2e GS |
351 | lc->restart_psw.mask |= PSW_ASC_HOME; |
352 | lc->external_new_psw.mask = psw_kernel_bits; | |
c9e37353 HC |
353 | lc->external_new_psw.addr = |
354 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
c1821c2e | 355 | lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_IO | PSW_MASK_EXT; |
c9e37353 | 356 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
c1821c2e | 357 | lc->program_new_psw.mask = psw_kernel_bits; |
c9e37353 HC |
358 | lc->program_new_psw.addr = |
359 | PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; | |
77fa2245 | 360 | lc->mcck_new_psw.mask = |
c1821c2e | 361 | psw_kernel_bits & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; |
c9e37353 HC |
362 | lc->mcck_new_psw.addr = |
363 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
c1821c2e | 364 | lc->io_new_psw.mask = psw_kernel_bits; |
c9e37353 | 365 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
5a62b192 | 366 | lc->clock_comparator = -1ULL; |
c9e37353 HC |
367 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; |
368 | lc->async_stack = (unsigned long) | |
369 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; | |
c9e37353 HC |
370 | lc->panic_stack = (unsigned long) |
371 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; | |
c9e37353 HC |
372 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
373 | lc->thread_info = (unsigned long) &init_thread_union; | |
25097bf1 | 374 | lc->machine_flags = S390_lowcore.machine_flags; |
14375bc4 MS |
375 | lc->stfl_fac_list = S390_lowcore.stfl_fac_list; |
376 | memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, | |
377 | MAX_FACILITY_BIT/8); | |
347a8dc3 | 378 | #ifndef CONFIG_64BIT |
77fa2245 HC |
379 | if (MACHINE_HAS_IEEE) { |
380 | lc->extended_save_area_addr = (__u32) | |
a0878656 | 381 | __alloc_bootmem_low(PAGE_SIZE, PAGE_SIZE, 0); |
77fa2245 | 382 | /* enable extended save area */ |
c4972f33 | 383 | __ctl_set_bit(14, 29); |
77fa2245 | 384 | } |
c742b31c | 385 | #else |
215b3096 | 386 | lc->cmf_hpp = -1ULL; |
c742b31c | 387 | lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; |
77fa2245 | 388 | #endif |
ab96e798 MS |
389 | lc->sync_enter_timer = S390_lowcore.sync_enter_timer; |
390 | lc->async_enter_timer = S390_lowcore.async_enter_timer; | |
391 | lc->exit_timer = S390_lowcore.exit_timer; | |
392 | lc->user_timer = S390_lowcore.user_timer; | |
393 | lc->system_timer = S390_lowcore.system_timer; | |
394 | lc->steal_timer = S390_lowcore.steal_timer; | |
395 | lc->last_update_timer = S390_lowcore.last_update_timer; | |
396 | lc->last_update_clock = S390_lowcore.last_update_clock; | |
dfd9f7ab | 397 | lc->ftrace_func = S390_lowcore.ftrace_func; |
c9e37353 | 398 | set_prefix((u32)(unsigned long) lc); |
099b7651 | 399 | lowcore_ptr[0] = lc; |
c9e37353 HC |
400 | } |
401 | ||
71189284 HC |
402 | static struct resource code_resource = { |
403 | .name = "Kernel code", | |
404 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
405 | }; | |
406 | ||
407 | static struct resource data_resource = { | |
408 | .name = "Kernel data", | |
409 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
410 | }; | |
411 | ||
4cc69531 HC |
412 | static struct resource bss_resource = { |
413 | .name = "Kernel bss", | |
414 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
415 | }; | |
416 | ||
71189284 HC |
417 | static struct resource __initdata *standard_resources[] = { |
418 | &code_resource, | |
419 | &data_resource, | |
4cc69531 | 420 | &bss_resource, |
71189284 HC |
421 | }; |
422 | ||
423 | static void __init setup_resources(void) | |
c9e37353 | 424 | { |
71189284 HC |
425 | struct resource *res, *std_res, *sub_res; |
426 | int i, j; | |
c9e37353 | 427 | |
cc13ad62 HC |
428 | code_resource.start = (unsigned long) &_text; |
429 | code_resource.end = (unsigned long) &_etext - 1; | |
430 | data_resource.start = (unsigned long) &_etext; | |
431 | data_resource.end = (unsigned long) &_edata - 1; | |
4cc69531 HC |
432 | bss_resource.start = (unsigned long) &__bss_start; |
433 | bss_resource.end = (unsigned long) &__bss_stop - 1; | |
cc13ad62 | 434 | |
9f4b0ba8 HC |
435 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
436 | if (!memory_chunk[i].size) | |
437 | continue; | |
71189284 | 438 | res = alloc_bootmem_low(sizeof(*res)); |
c9e37353 HC |
439 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; |
440 | switch (memory_chunk[i].type) { | |
441 | case CHUNK_READ_WRITE: | |
442 | res->name = "System RAM"; | |
443 | break; | |
444 | case CHUNK_READ_ONLY: | |
445 | res->name = "System ROM"; | |
446 | res->flags |= IORESOURCE_READONLY; | |
447 | break; | |
448 | default: | |
449 | res->name = "reserved"; | |
450 | } | |
451 | res->start = memory_chunk[i].addr; | |
71189284 | 452 | res->end = res->start + memory_chunk[i].size - 1; |
c9e37353 | 453 | request_resource(&iomem_resource, res); |
fe355b7f | 454 | |
71189284 HC |
455 | for (j = 0; j < ARRAY_SIZE(standard_resources); j++) { |
456 | std_res = standard_resources[j]; | |
457 | if (std_res->start < res->start || | |
458 | std_res->start > res->end) | |
459 | continue; | |
460 | if (std_res->end > res->end) { | |
461 | sub_res = alloc_bootmem_low(sizeof(*sub_res)); | |
462 | *sub_res = *std_res; | |
463 | sub_res->end = res->end; | |
464 | std_res->start = res->end + 1; | |
465 | request_resource(res, sub_res); | |
466 | } else { | |
467 | request_resource(res, std_res); | |
468 | } | |
fe355b7f | 469 | } |
c9e37353 HC |
470 | } |
471 | } | |
472 | ||
411ed322 MH |
473 | unsigned long real_memory_size; |
474 | EXPORT_SYMBOL_GPL(real_memory_size); | |
475 | ||
8b62bc96 HC |
476 | static void __init setup_memory_end(void) |
477 | { | |
411ed322 | 478 | unsigned long memory_size; |
5fd9c6e2 | 479 | unsigned long max_mem; |
8b62bc96 HC |
480 | int i; |
481 | ||
59f2e69d | 482 | #ifdef CONFIG_ZFCPDUMP |
23d75d9c | 483 | if (ipl_info.type == IPL_TYPE_FCP_DUMP) { |
411ed322 | 484 | memory_end = ZFCPDUMP_HSA_SIZE; |
23d75d9c HC |
485 | memory_end_set = 1; |
486 | } | |
411ed322 MH |
487 | #endif |
488 | memory_size = 0; | |
8b62bc96 HC |
489 | memory_end &= PAGE_MASK; |
490 | ||
0189103c | 491 | max_mem = memory_end ? min(VMEM_MAX_PHYS, memory_end) : VMEM_MAX_PHYS; |
5fd9c6e2 | 492 | memory_end = min(max_mem, memory_end); |
8b62bc96 | 493 | |
9f4b0ba8 HC |
494 | /* |
495 | * Make sure all chunks are MAX_ORDER aligned so we don't need the | |
496 | * extra checks that HOLES_IN_ZONE would require. | |
497 | */ | |
498 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
499 | unsigned long start, end; | |
500 | struct mem_chunk *chunk; | |
501 | unsigned long align; | |
502 | ||
503 | chunk = &memory_chunk[i]; | |
504 | align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); | |
505 | start = (chunk->addr + align - 1) & ~(align - 1); | |
506 | end = (chunk->addr + chunk->size) & ~(align - 1); | |
507 | if (start >= end) | |
508 | memset(chunk, 0, sizeof(*chunk)); | |
509 | else { | |
510 | chunk->addr = start; | |
511 | chunk->size = end - start; | |
512 | } | |
513 | } | |
514 | ||
8b62bc96 HC |
515 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
516 | struct mem_chunk *chunk = &memory_chunk[i]; | |
517 | ||
411ed322 MH |
518 | real_memory_size = max(real_memory_size, |
519 | chunk->addr + chunk->size); | |
8b62bc96 HC |
520 | if (chunk->addr >= max_mem) { |
521 | memset(chunk, 0, sizeof(*chunk)); | |
522 | continue; | |
523 | } | |
524 | if (chunk->addr + chunk->size > max_mem) | |
525 | chunk->size = max_mem - chunk->addr; | |
526 | memory_size = max(memory_size, chunk->addr + chunk->size); | |
527 | } | |
528 | if (!memory_end) | |
529 | memory_end = memory_size; | |
8b62bc96 HC |
530 | } |
531 | ||
7dd6b334 MH |
532 | void *restart_stack __attribute__((__section__(".data"))); |
533 | ||
534 | /* | |
535 | * Setup new PSW and allocate stack for PSW restart interrupt | |
536 | */ | |
537 | static void __init setup_restart_psw(void) | |
538 | { | |
539 | psw_t psw; | |
540 | ||
541 | restart_stack = __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0); | |
542 | restart_stack += ASYNC_SIZE; | |
543 | ||
544 | /* | |
545 | * Setup restart PSW for absolute zero lowcore. This is necesary | |
546 | * if PSW restart is done on an offline CPU that has lowcore zero | |
547 | */ | |
548 | psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; | |
549 | psw.addr = PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler; | |
550 | copy_to_absolute_zero(&S390_lowcore.restart_psw, &psw, sizeof(psw)); | |
551 | } | |
552 | ||
c9e37353 HC |
553 | static void __init |
554 | setup_memory(void) | |
555 | { | |
556 | unsigned long bootmap_size; | |
fe355b7f | 557 | unsigned long start_pfn, end_pfn; |
c9e37353 | 558 | int i; |
1da177e4 LT |
559 | |
560 | /* | |
561 | * partially used pages are not usable - thus | |
562 | * we are rounding upwards: | |
563 | */ | |
65912a84 HC |
564 | start_pfn = PFN_UP(__pa(&_end)); |
565 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 566 | |
65912a84 HC |
567 | #ifdef CONFIG_BLK_DEV_INITRD |
568 | /* | |
569 | * Move the initrd in case the bitmap of the bootmem allocater | |
570 | * would overwrite it. | |
571 | */ | |
572 | ||
573 | if (INITRD_START && INITRD_SIZE) { | |
574 | unsigned long bmap_size; | |
575 | unsigned long start; | |
576 | ||
577 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
578 | bmap_size = PFN_PHYS(bmap_size); | |
579 | ||
580 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
581 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
582 | ||
583 | if (start + INITRD_SIZE > memory_end) { | |
3b6ed4ab MS |
584 | pr_err("initrd extends beyond end of " |
585 | "memory (0x%08lx > 0x%08lx) " | |
65912a84 HC |
586 | "disabling initrd\n", |
587 | start + INITRD_SIZE, memory_end); | |
588 | INITRD_START = INITRD_SIZE = 0; | |
589 | } else { | |
3b6ed4ab MS |
590 | pr_info("Moving initrd (0x%08lx -> " |
591 | "0x%08lx, size: %ld)\n", | |
592 | INITRD_START, start, INITRD_SIZE); | |
65912a84 HC |
593 | memmove((void *) start, (void *) INITRD_START, |
594 | INITRD_SIZE); | |
595 | INITRD_START = start; | |
596 | } | |
597 | } | |
598 | } | |
599 | #endif | |
600 | ||
1da177e4 | 601 | /* |
7676bef9 | 602 | * Initialize the boot-time allocator |
1da177e4 LT |
603 | */ |
604 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
605 | ||
606 | /* | |
607 | * Register RAM areas with the bootmem allocator. | |
608 | */ | |
c9e37353 | 609 | |
0b642ede | 610 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
39b742f9 | 611 | unsigned long start_chunk, end_chunk, pfn; |
1da177e4 LT |
612 | |
613 | if (memory_chunk[i].type != CHUNK_READ_WRITE) | |
614 | continue; | |
39b742f9 | 615 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
fb2e7c5e | 616 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |
39b742f9 HC |
617 | end_chunk = min(end_chunk, end_pfn); |
618 | if (start_chunk >= end_chunk) | |
619 | continue; | |
620 | add_active_range(0, start_chunk, end_chunk); | |
621 | pfn = max(start_chunk, start_pfn); | |
fb2e7c5e | 622 | for (; pfn < end_chunk; pfn++) |
e2b8d7af MS |
623 | page_set_storage_key(PFN_PHYS(pfn), |
624 | PAGE_DEFAULT_KEY, 0); | |
1da177e4 LT |
625 | } |
626 | ||
0b642ede PO |
627 | psw_set_key(PAGE_DEFAULT_KEY); |
628 | ||
39b742f9 | 629 | free_bootmem_with_active_regions(0, max_pfn); |
c9e37353 | 630 | |
615b04b3 HC |
631 | /* |
632 | * Reserve memory used for lowcore/command line/kernel image. | |
633 | */ | |
72a7fe39 | 634 | reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
615b04b3 | 635 | reserve_bootmem((unsigned long)_stext, |
72a7fe39 BW |
636 | PFN_PHYS(start_pfn) - (unsigned long)_stext, |
637 | BOOTMEM_DEFAULT); | |
c9e37353 HC |
638 | /* |
639 | * Reserve the bootmem bitmap itself as well. We do this in two | |
640 | * steps (first step was init_bootmem()) because this catches | |
641 | * the (very unlikely) case of us accidentally initializing the | |
642 | * bootmem allocator with an invalid RAM area. | |
643 | */ | |
72a7fe39 BW |
644 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, |
645 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
646 | |
647 | #ifdef CONFIG_BLK_DEV_INITRD | |
65912a84 | 648 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 | 649 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
72a7fe39 BW |
650 | reserve_bootmem(INITRD_START, INITRD_SIZE, |
651 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
652 | initrd_start = INITRD_START; |
653 | initrd_end = initrd_start + INITRD_SIZE; | |
654 | } else { | |
3b6ed4ab MS |
655 | pr_err("initrd extends beyond end of " |
656 | "memory (0x%08lx > 0x%08lx) " | |
657 | "disabling initrd\n", | |
c9e37353 HC |
658 | initrd_start + INITRD_SIZE, memory_end); |
659 | initrd_start = initrd_end = 0; | |
1da177e4 | 660 | } |
c9e37353 | 661 | } |
1da177e4 | 662 | #endif |
c9e37353 | 663 | } |
1da177e4 | 664 | |
cf8ba7a9 MS |
665 | /* |
666 | * Setup hardware capabilities. | |
667 | */ | |
668 | static void __init setup_hwcaps(void) | |
669 | { | |
670 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; | |
94038a99 | 671 | struct cpuid cpu_id; |
cf8ba7a9 MS |
672 | int i; |
673 | ||
cf8ba7a9 MS |
674 | /* |
675 | * The store facility list bits numbers as found in the principles | |
676 | * of operation are numbered with bit 1UL<<31 as number 0 to | |
677 | * bit 1UL<<0 as number 31. | |
678 | * Bit 0: instructions named N3, "backported" to esa-mode | |
679 | * Bit 2: z/Architecture mode is active | |
680 | * Bit 7: the store-facility-list-extended facility is installed | |
681 | * Bit 17: the message-security assist is installed | |
682 | * Bit 19: the long-displacement facility is installed | |
683 | * Bit 21: the extended-immediate facility is installed | |
488253ce AK |
684 | * Bit 22: extended-translation facility 3 is installed |
685 | * Bit 30: extended-translation facility 3 enhancement facility | |
cf8ba7a9 MS |
686 | * These get translated to: |
687 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, | |
688 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, | |
488253ce AK |
689 | * HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and |
690 | * HWCAP_S390_ETF3EH bit 8 (22 && 30). | |
cf8ba7a9 MS |
691 | */ |
692 | for (i = 0; i < 6; i++) | |
14375bc4 | 693 | if (test_facility(stfl_bits[i])) |
cf8ba7a9 MS |
694 | elf_hwcap |= 1UL << i; |
695 | ||
14375bc4 | 696 | if (test_facility(22) && test_facility(30)) |
ea2a4d3a | 697 | elf_hwcap |= HWCAP_S390_ETF3EH; |
488253ce | 698 | |
cf8ba7a9 MS |
699 | /* |
700 | * Check for additional facilities with store-facility-list-extended. | |
701 | * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 | |
702 | * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information | |
703 | * as stored by stfl, bits 32-xxx contain additional facilities. | |
704 | * How many facility words are stored depends on the number of | |
25985edc | 705 | * doublewords passed to the instruction. The additional facilities |
cf8ba7a9 | 706 | * are: |
2ac3307f CE |
707 | * Bit 42: decimal floating point facility is installed |
708 | * Bit 44: perform floating point operation facility is installed | |
cf8ba7a9 | 709 | * translated to: |
488253ce | 710 | * HWCAP_S390_DFP bit 6 (42 && 44). |
cf8ba7a9 | 711 | */ |
14375bc4 MS |
712 | if ((elf_hwcap & (1UL << 2)) && test_facility(42) && test_facility(44)) |
713 | elf_hwcap |= HWCAP_S390_DFP; | |
cf8ba7a9 | 714 | |
ea2a4d3a HC |
715 | /* |
716 | * Huge page support HWCAP_S390_HPAGE is bit 7. | |
717 | */ | |
53492b1d | 718 | if (MACHINE_HAS_HPAGE) |
ea2a4d3a HC |
719 | elf_hwcap |= HWCAP_S390_HPAGE; |
720 | ||
721 | /* | |
722 | * 64-bit register support for 31-bit processes | |
723 | * HWCAP_S390_HIGH_GPRS is bit 9. | |
724 | */ | |
725 | elf_hwcap |= HWCAP_S390_HIGH_GPRS; | |
53492b1d | 726 | |
94038a99 MS |
727 | get_cpu_id(&cpu_id); |
728 | switch (cpu_id.machine) { | |
cf8ba7a9 MS |
729 | case 0x9672: |
730 | #if !defined(CONFIG_64BIT) | |
731 | default: /* Use "g5" as default for 31 bit kernels. */ | |
732 | #endif | |
733 | strcpy(elf_platform, "g5"); | |
734 | break; | |
735 | case 0x2064: | |
736 | case 0x2066: | |
737 | #if defined(CONFIG_64BIT) | |
738 | default: /* Use "z900" as default for 64 bit kernels. */ | |
739 | #endif | |
740 | strcpy(elf_platform, "z900"); | |
741 | break; | |
742 | case 0x2084: | |
743 | case 0x2086: | |
744 | strcpy(elf_platform, "z990"); | |
745 | break; | |
746 | case 0x2094: | |
9fee8db2 | 747 | case 0x2096: |
cf8ba7a9 MS |
748 | strcpy(elf_platform, "z9-109"); |
749 | break; | |
9fee8db2 MS |
750 | case 0x2097: |
751 | case 0x2098: | |
752 | strcpy(elf_platform, "z10"); | |
753 | break; | |
c84b9051 | 754 | case 0x2817: |
3a81b171 | 755 | case 0x2818: |
c84b9051 HC |
756 | strcpy(elf_platform, "z196"); |
757 | break; | |
cf8ba7a9 MS |
758 | } |
759 | } | |
760 | ||
c9e37353 HC |
761 | /* |
762 | * Setup function called from init/main.c just after the banner | |
763 | * was printed. | |
764 | */ | |
1da177e4 | 765 | |
c9e37353 HC |
766 | void __init |
767 | setup_arch(char **cmdline_p) | |
768 | { | |
1da177e4 | 769 | /* |
c9e37353 | 770 | * print what head.S has found out about the machine |
1da177e4 | 771 | */ |
347a8dc3 | 772 | #ifndef CONFIG_64BIT |
3b6ed4ab MS |
773 | if (MACHINE_IS_VM) |
774 | pr_info("Linux is running as a z/VM " | |
775 | "guest operating system in 31-bit mode\n"); | |
27d71602 | 776 | else if (MACHINE_IS_LPAR) |
3b6ed4ab MS |
777 | pr_info("Linux is running natively in 31-bit mode\n"); |
778 | if (MACHINE_HAS_IEEE) | |
779 | pr_info("The hardware system has IEEE compatible " | |
780 | "floating point units\n"); | |
781 | else | |
782 | pr_info("The hardware system has no IEEE compatible " | |
783 | "floating point units\n"); | |
347a8dc3 | 784 | #else /* CONFIG_64BIT */ |
fa587743 | 785 | if (MACHINE_IS_VM) |
3b6ed4ab MS |
786 | pr_info("Linux is running as a z/VM " |
787 | "guest operating system in 64-bit mode\n"); | |
637952ca | 788 | else if (MACHINE_IS_KVM) |
3b6ed4ab | 789 | pr_info("Linux is running under KVM in 64-bit mode\n"); |
27d71602 | 790 | else if (MACHINE_IS_LPAR) |
3b6ed4ab | 791 | pr_info("Linux is running natively in 64-bit mode\n"); |
347a8dc3 | 792 | #endif /* CONFIG_64BIT */ |
c9e37353 | 793 | |
a0443fbb HB |
794 | /* Have one command line that is parsed and saved in /proc/cmdline */ |
795 | /* boot_command_line has been already set up in early.c */ | |
796 | *cmdline_p = boot_command_line; | |
59685296 | 797 | |
c9e37353 | 798 | ROOT_DEV = Root_RAM0; |
59685296 HC |
799 | |
800 | init_mm.start_code = PAGE_OFFSET; | |
801 | init_mm.end_code = (unsigned long) &_etext; | |
802 | init_mm.end_data = (unsigned long) &_edata; | |
803 | init_mm.brk = (unsigned long) &_end; | |
804 | ||
6c2a9e6d GS |
805 | if (MACHINE_HAS_MVCOS) |
806 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); | |
807 | else | |
808 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); | |
809 | ||
59685296 HC |
810 | parse_early_param(); |
811 | ||
99ca4e58 | 812 | setup_ipl(); |
8b62bc96 | 813 | setup_memory_end(); |
c1821c2e | 814 | setup_addressing_mode(); |
c9e37353 HC |
815 | setup_memory(); |
816 | setup_resources(); | |
7dd6b334 | 817 | setup_restart_psw(); |
c9e37353 HC |
818 | setup_lowcore(); |
819 | ||
1da177e4 | 820 | cpu_init(); |
dbd70fb4 | 821 | s390_init_cpu_topology(); |
1da177e4 | 822 | |
cf8ba7a9 MS |
823 | /* |
824 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). | |
825 | */ | |
826 | setup_hwcaps(); | |
827 | ||
1da177e4 LT |
828 | /* |
829 | * Create kernel page tables and switch to virtual addressing. | |
830 | */ | |
831 | paging_init(); | |
832 | ||
833 | /* Setup default console */ | |
834 | conmode_default(); | |
637952ca | 835 | set_preferred_console(); |
411ed322 MH |
836 | |
837 | /* Setup zfcpdump support */ | |
838 | setup_zfcpdump(console_devno); | |
1da177e4 | 839 | } |