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