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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * arch/s390/kernel/setup.c | |
3 | * | |
4 | * S390 version | |
5 | * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
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> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/user.h> | |
1da177e4 LT |
30 | #include <linux/tty.h> |
31 | #include <linux/ioport.h> | |
32 | #include <linux/delay.h> | |
1da177e4 LT |
33 | #include <linux/init.h> |
34 | #include <linux/initrd.h> | |
35 | #include <linux/bootmem.h> | |
36 | #include <linux/root_dev.h> | |
37 | #include <linux/console.h> | |
1da177e4 | 38 | #include <linux/kernel_stat.h> |
1e8e3383 | 39 | #include <linux/device.h> |
585c3047 | 40 | #include <linux/notifier.h> |
65912a84 | 41 | #include <linux/pfn.h> |
fe355b7f | 42 | #include <linux/ctype.h> |
2b67fc46 | 43 | #include <linux/reboot.h> |
dbd70fb4 | 44 | #include <linux/topology.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 | ||
2e5061e4 | 85 | unsigned long machine_flags; |
1485c5c8 HC |
86 | EXPORT_SYMBOL(machine_flags); |
87 | ||
cf8ba7a9 MS |
88 | unsigned long elf_hwcap = 0; |
89 | char elf_platform[ELF_PLATFORM_SIZE]; | |
36a2bd42 | 90 | |
23d17421 | 91 | struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
1da177e4 | 92 | volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ |
23d75d9c HC |
93 | |
94 | int __initdata memory_end_set; | |
95 | unsigned long __initdata memory_end; | |
1da177e4 | 96 | |
099b7651 FM |
97 | /* An array with a pointer to the lowcore of every CPU. */ |
98 | struct _lowcore *lowcore_ptr[NR_CPUS]; | |
99 | EXPORT_SYMBOL(lowcore_ptr); | |
100 | ||
1da177e4 LT |
101 | /* |
102 | * This is set up by the setup-routine at boot-time | |
103 | * for S390 need to find out, what we have to setup | |
104 | * using address 0x10400 ... | |
105 | */ | |
106 | ||
107 | #include <asm/setup.h> | |
108 | ||
1da177e4 LT |
109 | static struct resource code_resource = { |
110 | .name = "Kernel code", | |
111 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
112 | }; | |
113 | ||
114 | static struct resource data_resource = { | |
115 | .name = "Kernel data", | |
116 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
117 | }; | |
118 | ||
119 | /* | |
120 | * cpu_init() initializes state that is per-CPU. | |
121 | */ | |
ea1f4eec | 122 | void __cpuinit cpu_init(void) |
1da177e4 | 123 | { |
1da177e4 LT |
124 | /* |
125 | * Store processor id in lowcore (used e.g. in timer_interrupt) | |
126 | */ | |
7b468488 | 127 | get_cpu_id(&S390_lowcore.cpu_id); |
1da177e4 LT |
128 | |
129 | /* | |
130 | * Force FPU initialization: | |
131 | */ | |
132 | clear_thread_flag(TIF_USEDFPU); | |
133 | clear_used_math(); | |
134 | ||
135 | atomic_inc(&init_mm.mm_count); | |
136 | current->active_mm = &init_mm; | |
6aa0d3a9 | 137 | BUG_ON(current->mm); |
1da177e4 LT |
138 | enter_lazy_tlb(&init_mm, current); |
139 | } | |
140 | ||
1da177e4 LT |
141 | /* |
142 | * condev= and conmode= setup parameter. | |
143 | */ | |
144 | ||
145 | static int __init condev_setup(char *str) | |
146 | { | |
147 | int vdev; | |
148 | ||
149 | vdev = simple_strtoul(str, &str, 0); | |
150 | if (vdev >= 0 && vdev < 65536) { | |
151 | console_devno = vdev; | |
152 | console_irq = -1; | |
153 | } | |
154 | return 1; | |
155 | } | |
156 | ||
157 | __setup("condev=", condev_setup); | |
158 | ||
159 | static int __init conmode_setup(char *str) | |
160 | { | |
8c0933ee | 161 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
162 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) |
163 | SET_CONSOLE_SCLP; | |
164 | #endif | |
165 | #if defined(CONFIG_TN3215_CONSOLE) | |
166 | if (strncmp(str, "3215", 5) == 0) | |
167 | SET_CONSOLE_3215; | |
168 | #endif | |
169 | #if defined(CONFIG_TN3270_CONSOLE) | |
170 | if (strncmp(str, "3270", 5) == 0) | |
171 | SET_CONSOLE_3270; | |
172 | #endif | |
173 | return 1; | |
174 | } | |
175 | ||
176 | __setup("conmode=", conmode_setup); | |
177 | ||
178 | static void __init conmode_default(void) | |
179 | { | |
180 | char query_buffer[1024]; | |
181 | char *ptr; | |
182 | ||
183 | if (MACHINE_IS_VM) { | |
740b5706 | 184 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
185 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
186 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
187 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
740b5706 | 188 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
189 | ptr = strstr(query_buffer, "CONMODE"); |
190 | /* | |
191 | * Set the conmode to 3215 so that the device recognition | |
192 | * will set the cu_type of the console to 3215. If the | |
193 | * conmode is 3270 and we don't set it back then both | |
194 | * 3215 and the 3270 driver will try to access the console | |
195 | * device (3215 as console and 3270 as normal tty). | |
196 | */ | |
740b5706 | 197 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 | 198 | if (ptr == NULL) { |
8c0933ee | 199 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
200 | SET_CONSOLE_SCLP; |
201 | #endif | |
202 | return; | |
203 | } | |
204 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
205 | #if defined(CONFIG_TN3270_CONSOLE) | |
206 | SET_CONSOLE_3270; | |
207 | #elif defined(CONFIG_TN3215_CONSOLE) | |
208 | SET_CONSOLE_3215; | |
8c0933ee | 209 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
210 | SET_CONSOLE_SCLP; |
211 | #endif | |
212 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
213 | #if defined(CONFIG_TN3215_CONSOLE) | |
214 | SET_CONSOLE_3215; | |
215 | #elif defined(CONFIG_TN3270_CONSOLE) | |
216 | SET_CONSOLE_3270; | |
8c0933ee | 217 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
218 | SET_CONSOLE_SCLP; |
219 | #endif | |
220 | } | |
1da177e4 | 221 | } else { |
8c0933ee | 222 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
223 | SET_CONSOLE_SCLP; |
224 | #endif | |
225 | } | |
226 | } | |
227 | ||
59f2e69d | 228 | #ifdef CONFIG_ZFCPDUMP |
411ed322 MH |
229 | static void __init setup_zfcpdump(unsigned int console_devno) |
230 | { | |
a0443fbb | 231 | static char str[41]; |
411ed322 MH |
232 | |
233 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) | |
234 | return; | |
235 | if (console_devno != -1) | |
a0443fbb | 236 | sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x", |
411ed322 MH |
237 | ipl_info.data.fcp.dev_id.devno, console_devno); |
238 | else | |
a0443fbb | 239 | sprintf(str, " cio_ignore=all,!0.0.%04x", |
411ed322 | 240 | ipl_info.data.fcp.dev_id.devno); |
a0443fbb | 241 | strcat(boot_command_line, str); |
411ed322 MH |
242 | console_loglevel = 2; |
243 | } | |
244 | #else | |
245 | static inline void setup_zfcpdump(unsigned int console_devno) {} | |
246 | #endif /* CONFIG_ZFCPDUMP */ | |
247 | ||
1da177e4 LT |
248 | /* |
249 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
250 | * _machine_halt or _machine_power_off. | |
251 | */ | |
252 | ||
253 | void machine_restart(char *command) | |
254 | { | |
7aa8dac7 | 255 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
06fa46a2 MS |
256 | /* |
257 | * Only unblank the console if we are called in enabled | |
258 | * context or a bust_spinlocks cleared the way for us. | |
259 | */ | |
260 | console_unblank(); | |
1da177e4 LT |
261 | _machine_restart(command); |
262 | } | |
263 | ||
1da177e4 LT |
264 | void machine_halt(void) |
265 | { | |
06fa46a2 MS |
266 | if (!in_interrupt() || oops_in_progress) |
267 | /* | |
268 | * Only unblank the console if we are called in enabled | |
269 | * context or a bust_spinlocks cleared the way for us. | |
270 | */ | |
271 | console_unblank(); | |
1da177e4 LT |
272 | _machine_halt(); |
273 | } | |
274 | ||
1da177e4 LT |
275 | void machine_power_off(void) |
276 | { | |
06fa46a2 MS |
277 | if (!in_interrupt() || oops_in_progress) |
278 | /* | |
279 | * Only unblank the console if we are called in enabled | |
280 | * context or a bust_spinlocks cleared the way for us. | |
281 | */ | |
282 | console_unblank(); | |
1da177e4 LT |
283 | _machine_power_off(); |
284 | } | |
285 | ||
53df751c MS |
286 | /* |
287 | * Dummy power off function. | |
288 | */ | |
289 | void (*pm_power_off)(void) = machine_power_off; | |
290 | ||
59685296 HC |
291 | static int __init early_parse_mem(char *p) |
292 | { | |
293 | memory_end = memparse(p, &p); | |
23d75d9c | 294 | memory_end_set = 1; |
59685296 HC |
295 | return 0; |
296 | } | |
297 | early_param("mem", early_parse_mem); | |
298 | ||
c1821c2e GS |
299 | #ifdef CONFIG_S390_SWITCH_AMODE |
300 | unsigned int switch_amode = 0; | |
301 | EXPORT_SYMBOL_GPL(switch_amode); | |
302 | ||
3b6ed4ab MS |
303 | static int set_amode_and_uaccess(unsigned long user_amode, |
304 | unsigned long user32_amode) | |
c1821c2e GS |
305 | { |
306 | psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode | | |
307 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
308 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
309 | #ifdef CONFIG_COMPAT | |
310 | psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode | | |
311 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
312 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
313 | psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode | | |
314 | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | | |
315 | PSW32_MASK_PSTATE; | |
316 | #endif | |
317 | psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | | |
318 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY; | |
319 | ||
320 | if (MACHINE_HAS_MVCOS) { | |
c1821c2e | 321 | memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); |
3b6ed4ab | 322 | return 1; |
c1821c2e | 323 | } else { |
c1821c2e | 324 | memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); |
3b6ed4ab | 325 | return 0; |
c1821c2e GS |
326 | } |
327 | } | |
328 | ||
329 | /* | |
330 | * Switch kernel/user addressing modes? | |
331 | */ | |
332 | static int __init early_parse_switch_amode(char *p) | |
333 | { | |
334 | switch_amode = 1; | |
335 | return 0; | |
336 | } | |
337 | early_param("switch_amode", early_parse_switch_amode); | |
338 | ||
339 | #else /* CONFIG_S390_SWITCH_AMODE */ | |
3b6ed4ab MS |
340 | static inline int set_amode_and_uaccess(unsigned long user_amode, |
341 | unsigned long user32_amode) | |
c1821c2e | 342 | { |
3b6ed4ab | 343 | return 0; |
c1821c2e GS |
344 | } |
345 | #endif /* CONFIG_S390_SWITCH_AMODE */ | |
346 | ||
347 | #ifdef CONFIG_S390_EXEC_PROTECT | |
348 | unsigned int s390_noexec = 0; | |
349 | EXPORT_SYMBOL_GPL(s390_noexec); | |
350 | ||
351 | /* | |
352 | * Enable execute protection? | |
353 | */ | |
354 | static int __init early_parse_noexec(char *p) | |
355 | { | |
356 | if (!strncmp(p, "off", 3)) | |
357 | return 0; | |
358 | switch_amode = 1; | |
359 | s390_noexec = 1; | |
360 | return 0; | |
361 | } | |
362 | early_param("noexec", early_parse_noexec); | |
363 | #endif /* CONFIG_S390_EXEC_PROTECT */ | |
364 | ||
365 | static void setup_addressing_mode(void) | |
366 | { | |
367 | if (s390_noexec) { | |
3b6ed4ab MS |
368 | if (set_amode_and_uaccess(PSW_ASC_SECONDARY, |
369 | PSW32_ASC_SECONDARY)) | |
370 | pr_info("Execute protection active, " | |
371 | "mvcos available\n"); | |
372 | else | |
373 | pr_info("Execute protection active, " | |
374 | "mvcos not available\n"); | |
7af0d6f7 | 375 | } else if (switch_amode) { |
3b6ed4ab MS |
376 | if (set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY)) |
377 | pr_info("Address spaces switched, " | |
378 | "mvcos available\n"); | |
379 | else | |
380 | pr_info("Address spaces switched, " | |
381 | "mvcos not available\n"); | |
c1821c2e | 382 | } |
411788ea HC |
383 | #ifdef CONFIG_TRACE_IRQFLAGS |
384 | sysc_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; | |
385 | io_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; | |
386 | #endif | |
c1821c2e GS |
387 | } |
388 | ||
c9e37353 HC |
389 | static void __init |
390 | setup_lowcore(void) | |
391 | { | |
392 | struct _lowcore *lc; | |
393 | int lc_pages; | |
394 | ||
395 | /* | |
396 | * Setup lowcore for boot cpu | |
397 | */ | |
398 | lc_pages = sizeof(void *) == 8 ? 2 : 1; | |
399 | lc = (struct _lowcore *) | |
400 | __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); | |
401 | memset(lc, 0, lc_pages * PAGE_SIZE); | |
0b642ede | 402 | lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; |
c9e37353 HC |
403 | lc->restart_psw.addr = |
404 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; | |
c1821c2e GS |
405 | if (switch_amode) |
406 | lc->restart_psw.mask |= PSW_ASC_HOME; | |
407 | lc->external_new_psw.mask = psw_kernel_bits; | |
c9e37353 HC |
408 | lc->external_new_psw.addr = |
409 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
c1821c2e | 410 | lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_IO | PSW_MASK_EXT; |
c9e37353 | 411 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
c1821c2e | 412 | lc->program_new_psw.mask = psw_kernel_bits; |
c9e37353 HC |
413 | lc->program_new_psw.addr = |
414 | PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; | |
77fa2245 | 415 | lc->mcck_new_psw.mask = |
c1821c2e | 416 | psw_kernel_bits & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; |
c9e37353 HC |
417 | lc->mcck_new_psw.addr = |
418 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
c1821c2e | 419 | lc->io_new_psw.mask = psw_kernel_bits; |
c9e37353 | 420 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
5a62b192 | 421 | lc->clock_comparator = -1ULL; |
c9e37353 HC |
422 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; |
423 | lc->async_stack = (unsigned long) | |
424 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; | |
c9e37353 HC |
425 | lc->panic_stack = (unsigned long) |
426 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; | |
c9e37353 HC |
427 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
428 | lc->thread_info = (unsigned long) &init_thread_union; | |
347a8dc3 | 429 | #ifndef CONFIG_64BIT |
77fa2245 HC |
430 | if (MACHINE_HAS_IEEE) { |
431 | lc->extended_save_area_addr = (__u32) | |
432 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0); | |
433 | /* enable extended save area */ | |
c4972f33 | 434 | __ctl_set_bit(14, 29); |
77fa2245 | 435 | } |
c742b31c MS |
436 | #else |
437 | lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; | |
77fa2245 | 438 | #endif |
c9e37353 | 439 | set_prefix((u32)(unsigned long) lc); |
099b7651 | 440 | lowcore_ptr[0] = lc; |
c9e37353 HC |
441 | } |
442 | ||
443 | static void __init | |
444 | setup_resources(void) | |
445 | { | |
fe355b7f | 446 | struct resource *res, *sub_res; |
c9e37353 HC |
447 | int i; |
448 | ||
cc13ad62 HC |
449 | code_resource.start = (unsigned long) &_text; |
450 | code_resource.end = (unsigned long) &_etext - 1; | |
451 | data_resource.start = (unsigned long) &_etext; | |
452 | data_resource.end = (unsigned long) &_edata - 1; | |
453 | ||
9f4b0ba8 HC |
454 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
455 | if (!memory_chunk[i].size) | |
456 | continue; | |
c9e37353 HC |
457 | res = alloc_bootmem_low(sizeof(struct resource)); |
458 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; | |
459 | switch (memory_chunk[i].type) { | |
460 | case CHUNK_READ_WRITE: | |
461 | res->name = "System RAM"; | |
462 | break; | |
463 | case CHUNK_READ_ONLY: | |
464 | res->name = "System ROM"; | |
465 | res->flags |= IORESOURCE_READONLY; | |
466 | break; | |
467 | default: | |
468 | res->name = "reserved"; | |
469 | } | |
470 | res->start = memory_chunk[i].addr; | |
471 | res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; | |
472 | request_resource(&iomem_resource, res); | |
fe355b7f HY |
473 | |
474 | if (code_resource.start >= res->start && | |
475 | code_resource.start <= res->end && | |
476 | code_resource.end > res->end) { | |
477 | sub_res = alloc_bootmem_low(sizeof(struct resource)); | |
478 | memcpy(sub_res, &code_resource, | |
479 | sizeof(struct resource)); | |
480 | sub_res->end = res->end; | |
481 | code_resource.start = res->end + 1; | |
482 | request_resource(res, sub_res); | |
483 | } | |
484 | ||
485 | if (code_resource.start >= res->start && | |
486 | code_resource.start <= res->end && | |
487 | code_resource.end <= res->end) | |
488 | request_resource(res, &code_resource); | |
489 | ||
490 | if (data_resource.start >= res->start && | |
491 | data_resource.start <= res->end && | |
492 | data_resource.end > res->end) { | |
493 | sub_res = alloc_bootmem_low(sizeof(struct resource)); | |
494 | memcpy(sub_res, &data_resource, | |
495 | sizeof(struct resource)); | |
496 | sub_res->end = res->end; | |
497 | data_resource.start = res->end + 1; | |
498 | request_resource(res, sub_res); | |
499 | } | |
500 | ||
501 | if (data_resource.start >= res->start && | |
502 | data_resource.start <= res->end && | |
503 | data_resource.end <= res->end) | |
504 | request_resource(res, &data_resource); | |
c9e37353 HC |
505 | } |
506 | } | |
507 | ||
411ed322 MH |
508 | unsigned long real_memory_size; |
509 | EXPORT_SYMBOL_GPL(real_memory_size); | |
510 | ||
8b62bc96 HC |
511 | static void __init setup_memory_end(void) |
512 | { | |
411ed322 | 513 | unsigned long memory_size; |
5fd9c6e2 | 514 | unsigned long max_mem; |
8b62bc96 HC |
515 | int i; |
516 | ||
59f2e69d | 517 | #ifdef CONFIG_ZFCPDUMP |
23d75d9c | 518 | if (ipl_info.type == IPL_TYPE_FCP_DUMP) { |
411ed322 | 519 | memory_end = ZFCPDUMP_HSA_SIZE; |
23d75d9c HC |
520 | memory_end_set = 1; |
521 | } | |
411ed322 MH |
522 | #endif |
523 | memory_size = 0; | |
8b62bc96 HC |
524 | memory_end &= PAGE_MASK; |
525 | ||
0189103c | 526 | max_mem = memory_end ? min(VMEM_MAX_PHYS, memory_end) : VMEM_MAX_PHYS; |
5fd9c6e2 | 527 | memory_end = min(max_mem, memory_end); |
8b62bc96 | 528 | |
9f4b0ba8 HC |
529 | /* |
530 | * Make sure all chunks are MAX_ORDER aligned so we don't need the | |
531 | * extra checks that HOLES_IN_ZONE would require. | |
532 | */ | |
533 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
534 | unsigned long start, end; | |
535 | struct mem_chunk *chunk; | |
536 | unsigned long align; | |
537 | ||
538 | chunk = &memory_chunk[i]; | |
539 | align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); | |
540 | start = (chunk->addr + align - 1) & ~(align - 1); | |
541 | end = (chunk->addr + chunk->size) & ~(align - 1); | |
542 | if (start >= end) | |
543 | memset(chunk, 0, sizeof(*chunk)); | |
544 | else { | |
545 | chunk->addr = start; | |
546 | chunk->size = end - start; | |
547 | } | |
548 | } | |
549 | ||
8b62bc96 HC |
550 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
551 | struct mem_chunk *chunk = &memory_chunk[i]; | |
552 | ||
411ed322 MH |
553 | real_memory_size = max(real_memory_size, |
554 | chunk->addr + chunk->size); | |
8b62bc96 HC |
555 | if (chunk->addr >= max_mem) { |
556 | memset(chunk, 0, sizeof(*chunk)); | |
557 | continue; | |
558 | } | |
559 | if (chunk->addr + chunk->size > max_mem) | |
560 | chunk->size = max_mem - chunk->addr; | |
561 | memory_size = max(memory_size, chunk->addr + chunk->size); | |
562 | } | |
563 | if (!memory_end) | |
564 | memory_end = memory_size; | |
8b62bc96 HC |
565 | } |
566 | ||
c9e37353 HC |
567 | static void __init |
568 | setup_memory(void) | |
569 | { | |
570 | unsigned long bootmap_size; | |
fe355b7f | 571 | unsigned long start_pfn, end_pfn; |
c9e37353 | 572 | int i; |
1da177e4 LT |
573 | |
574 | /* | |
575 | * partially used pages are not usable - thus | |
576 | * we are rounding upwards: | |
577 | */ | |
65912a84 HC |
578 | start_pfn = PFN_UP(__pa(&_end)); |
579 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 580 | |
65912a84 HC |
581 | #ifdef CONFIG_BLK_DEV_INITRD |
582 | /* | |
583 | * Move the initrd in case the bitmap of the bootmem allocater | |
584 | * would overwrite it. | |
585 | */ | |
586 | ||
587 | if (INITRD_START && INITRD_SIZE) { | |
588 | unsigned long bmap_size; | |
589 | unsigned long start; | |
590 | ||
591 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
592 | bmap_size = PFN_PHYS(bmap_size); | |
593 | ||
594 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
595 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
596 | ||
597 | if (start + INITRD_SIZE > memory_end) { | |
3b6ed4ab MS |
598 | pr_err("initrd extends beyond end of " |
599 | "memory (0x%08lx > 0x%08lx) " | |
65912a84 HC |
600 | "disabling initrd\n", |
601 | start + INITRD_SIZE, memory_end); | |
602 | INITRD_START = INITRD_SIZE = 0; | |
603 | } else { | |
3b6ed4ab MS |
604 | pr_info("Moving initrd (0x%08lx -> " |
605 | "0x%08lx, size: %ld)\n", | |
606 | INITRD_START, start, INITRD_SIZE); | |
65912a84 HC |
607 | memmove((void *) start, (void *) INITRD_START, |
608 | INITRD_SIZE); | |
609 | INITRD_START = start; | |
610 | } | |
611 | } | |
612 | } | |
613 | #endif | |
614 | ||
1da177e4 | 615 | /* |
7676bef9 | 616 | * Initialize the boot-time allocator |
1da177e4 LT |
617 | */ |
618 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
619 | ||
620 | /* | |
621 | * Register RAM areas with the bootmem allocator. | |
622 | */ | |
c9e37353 | 623 | |
0b642ede | 624 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
39b742f9 | 625 | unsigned long start_chunk, end_chunk, pfn; |
1da177e4 LT |
626 | |
627 | if (memory_chunk[i].type != CHUNK_READ_WRITE) | |
628 | continue; | |
39b742f9 | 629 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
fb2e7c5e | 630 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |
39b742f9 HC |
631 | end_chunk = min(end_chunk, end_pfn); |
632 | if (start_chunk >= end_chunk) | |
633 | continue; | |
634 | add_active_range(0, start_chunk, end_chunk); | |
635 | pfn = max(start_chunk, start_pfn); | |
fb2e7c5e | 636 | for (; pfn < end_chunk; pfn++) |
39b742f9 | 637 | page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY); |
1da177e4 LT |
638 | } |
639 | ||
0b642ede PO |
640 | psw_set_key(PAGE_DEFAULT_KEY); |
641 | ||
39b742f9 | 642 | free_bootmem_with_active_regions(0, max_pfn); |
c9e37353 | 643 | |
615b04b3 HC |
644 | /* |
645 | * Reserve memory used for lowcore/command line/kernel image. | |
646 | */ | |
72a7fe39 | 647 | reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
615b04b3 | 648 | reserve_bootmem((unsigned long)_stext, |
72a7fe39 BW |
649 | PFN_PHYS(start_pfn) - (unsigned long)_stext, |
650 | BOOTMEM_DEFAULT); | |
c9e37353 HC |
651 | /* |
652 | * Reserve the bootmem bitmap itself as well. We do this in two | |
653 | * steps (first step was init_bootmem()) because this catches | |
654 | * the (very unlikely) case of us accidentally initializing the | |
655 | * bootmem allocator with an invalid RAM area. | |
656 | */ | |
72a7fe39 BW |
657 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, |
658 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
659 | |
660 | #ifdef CONFIG_BLK_DEV_INITRD | |
65912a84 | 661 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 | 662 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
72a7fe39 BW |
663 | reserve_bootmem(INITRD_START, INITRD_SIZE, |
664 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
665 | initrd_start = INITRD_START; |
666 | initrd_end = initrd_start + INITRD_SIZE; | |
667 | } else { | |
3b6ed4ab MS |
668 | pr_err("initrd extends beyond end of " |
669 | "memory (0x%08lx > 0x%08lx) " | |
670 | "disabling initrd\n", | |
c9e37353 HC |
671 | initrd_start + INITRD_SIZE, memory_end); |
672 | initrd_start = initrd_end = 0; | |
1da177e4 | 673 | } |
c9e37353 | 674 | } |
1da177e4 | 675 | #endif |
c9e37353 | 676 | } |
1da177e4 | 677 | |
cf8ba7a9 MS |
678 | /* |
679 | * Setup hardware capabilities. | |
680 | */ | |
681 | static void __init setup_hwcaps(void) | |
682 | { | |
683 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; | |
cf8ba7a9 MS |
684 | unsigned long long facility_list_extended; |
685 | unsigned int facility_list; | |
686 | int i; | |
687 | ||
688 | facility_list = stfl(); | |
689 | /* | |
690 | * The store facility list bits numbers as found in the principles | |
691 | * of operation are numbered with bit 1UL<<31 as number 0 to | |
692 | * bit 1UL<<0 as number 31. | |
693 | * Bit 0: instructions named N3, "backported" to esa-mode | |
694 | * Bit 2: z/Architecture mode is active | |
695 | * Bit 7: the store-facility-list-extended facility is installed | |
696 | * Bit 17: the message-security assist is installed | |
697 | * Bit 19: the long-displacement facility is installed | |
698 | * Bit 21: the extended-immediate facility is installed | |
488253ce AK |
699 | * Bit 22: extended-translation facility 3 is installed |
700 | * Bit 30: extended-translation facility 3 enhancement facility | |
cf8ba7a9 MS |
701 | * These get translated to: |
702 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, | |
703 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, | |
488253ce AK |
704 | * HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and |
705 | * HWCAP_S390_ETF3EH bit 8 (22 && 30). | |
cf8ba7a9 MS |
706 | */ |
707 | for (i = 0; i < 6; i++) | |
708 | if (facility_list & (1UL << (31 - stfl_bits[i]))) | |
709 | elf_hwcap |= 1UL << i; | |
710 | ||
488253ce AK |
711 | if ((facility_list & (1UL << (31 - 22))) |
712 | && (facility_list & (1UL << (31 - 30)))) | |
713 | elf_hwcap |= 1UL << 8; | |
714 | ||
cf8ba7a9 MS |
715 | /* |
716 | * Check for additional facilities with store-facility-list-extended. | |
717 | * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 | |
718 | * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information | |
719 | * as stored by stfl, bits 32-xxx contain additional facilities. | |
720 | * How many facility words are stored depends on the number of | |
721 | * doublewords passed to the instruction. The additional facilites | |
722 | * are: | |
2ac3307f CE |
723 | * Bit 42: decimal floating point facility is installed |
724 | * Bit 44: perform floating point operation facility is installed | |
cf8ba7a9 | 725 | * translated to: |
488253ce | 726 | * HWCAP_S390_DFP bit 6 (42 && 44). |
cf8ba7a9 MS |
727 | */ |
728 | if ((elf_hwcap & (1UL << 2)) && | |
7b758389 | 729 | __stfle(&facility_list_extended, 1) > 0) { |
2ac3307f | 730 | if ((facility_list_extended & (1ULL << (63 - 42))) |
488253ce | 731 | && (facility_list_extended & (1ULL << (63 - 44)))) |
cf8ba7a9 MS |
732 | elf_hwcap |= 1UL << 6; |
733 | } | |
734 | ||
53492b1d GS |
735 | if (MACHINE_HAS_HPAGE) |
736 | elf_hwcap |= 1UL << 7; | |
737 | ||
7b468488 | 738 | switch (S390_lowcore.cpu_id.machine) { |
cf8ba7a9 MS |
739 | case 0x9672: |
740 | #if !defined(CONFIG_64BIT) | |
741 | default: /* Use "g5" as default for 31 bit kernels. */ | |
742 | #endif | |
743 | strcpy(elf_platform, "g5"); | |
744 | break; | |
745 | case 0x2064: | |
746 | case 0x2066: | |
747 | #if defined(CONFIG_64BIT) | |
748 | default: /* Use "z900" as default for 64 bit kernels. */ | |
749 | #endif | |
750 | strcpy(elf_platform, "z900"); | |
751 | break; | |
752 | case 0x2084: | |
753 | case 0x2086: | |
754 | strcpy(elf_platform, "z990"); | |
755 | break; | |
756 | case 0x2094: | |
9fee8db2 | 757 | case 0x2096: |
cf8ba7a9 MS |
758 | strcpy(elf_platform, "z9-109"); |
759 | break; | |
9fee8db2 MS |
760 | case 0x2097: |
761 | case 0x2098: | |
762 | strcpy(elf_platform, "z10"); | |
763 | break; | |
cf8ba7a9 MS |
764 | } |
765 | } | |
766 | ||
c9e37353 HC |
767 | /* |
768 | * Setup function called from init/main.c just after the banner | |
769 | * was printed. | |
770 | */ | |
1da177e4 | 771 | |
c9e37353 HC |
772 | void __init |
773 | setup_arch(char **cmdline_p) | |
774 | { | |
0946100f HB |
775 | /* set up preferred console */ |
776 | add_preferred_console("ttyS", 0, NULL); | |
777 | ||
1da177e4 | 778 | /* |
c9e37353 | 779 | * print what head.S has found out about the machine |
1da177e4 | 780 | */ |
347a8dc3 | 781 | #ifndef CONFIG_64BIT |
3b6ed4ab MS |
782 | if (MACHINE_IS_VM) |
783 | pr_info("Linux is running as a z/VM " | |
784 | "guest operating system in 31-bit mode\n"); | |
785 | else | |
786 | pr_info("Linux is running natively in 31-bit mode\n"); | |
787 | if (MACHINE_HAS_IEEE) | |
788 | pr_info("The hardware system has IEEE compatible " | |
789 | "floating point units\n"); | |
790 | else | |
791 | pr_info("The hardware system has no IEEE compatible " | |
792 | "floating point units\n"); | |
347a8dc3 | 793 | #else /* CONFIG_64BIT */ |
fa587743 | 794 | if (MACHINE_IS_VM) |
3b6ed4ab MS |
795 | pr_info("Linux is running as a z/VM " |
796 | "guest operating system in 64-bit mode\n"); | |
fa587743 | 797 | else if (MACHINE_IS_KVM) { |
3b6ed4ab | 798 | pr_info("Linux is running under KVM in 64-bit mode\n"); |
faeba830 CB |
799 | add_preferred_console("hvc", 0, NULL); |
800 | s390_virtio_console_init(); | |
fa587743 | 801 | } else |
3b6ed4ab | 802 | pr_info("Linux is running natively in 64-bit mode\n"); |
347a8dc3 | 803 | #endif /* CONFIG_64BIT */ |
c9e37353 | 804 | |
a0443fbb HB |
805 | /* Have one command line that is parsed and saved in /proc/cmdline */ |
806 | /* boot_command_line has been already set up in early.c */ | |
807 | *cmdline_p = boot_command_line; | |
59685296 | 808 | |
c9e37353 | 809 | ROOT_DEV = Root_RAM0; |
59685296 HC |
810 | |
811 | init_mm.start_code = PAGE_OFFSET; | |
812 | init_mm.end_code = (unsigned long) &_etext; | |
813 | init_mm.end_data = (unsigned long) &_edata; | |
814 | init_mm.brk = (unsigned long) &_end; | |
815 | ||
6c2a9e6d GS |
816 | if (MACHINE_HAS_MVCOS) |
817 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); | |
818 | else | |
819 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); | |
820 | ||
59685296 HC |
821 | parse_early_param(); |
822 | ||
99ca4e58 | 823 | setup_ipl(); |
8b62bc96 | 824 | setup_memory_end(); |
c1821c2e | 825 | setup_addressing_mode(); |
c9e37353 HC |
826 | setup_memory(); |
827 | setup_resources(); | |
828 | setup_lowcore(); | |
829 | ||
1da177e4 | 830 | cpu_init(); |
7b468488 | 831 | __cpu_logical_map[0] = stap(); |
dbd70fb4 | 832 | s390_init_cpu_topology(); |
1da177e4 | 833 | |
cf8ba7a9 MS |
834 | /* |
835 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). | |
836 | */ | |
837 | setup_hwcaps(); | |
838 | ||
1da177e4 LT |
839 | /* |
840 | * Create kernel page tables and switch to virtual addressing. | |
841 | */ | |
842 | paging_init(); | |
843 | ||
844 | /* Setup default console */ | |
845 | conmode_default(); | |
411ed322 MH |
846 | |
847 | /* Setup zfcpdump support */ | |
848 | setup_zfcpdump(console_devno); | |
1da177e4 | 849 | } |