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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 | ||
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]; |
1da177e4 | 89 | volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ |
23d75d9c HC |
90 | |
91 | int __initdata memory_end_set; | |
92 | unsigned long __initdata memory_end; | |
1da177e4 | 93 | |
099b7651 FM |
94 | /* An array with a pointer to the lowcore of every CPU. */ |
95 | struct _lowcore *lowcore_ptr[NR_CPUS]; | |
96 | EXPORT_SYMBOL(lowcore_ptr); | |
97 | ||
1da177e4 LT |
98 | /* |
99 | * This is set up by the setup-routine at boot-time | |
100 | * for S390 need to find out, what we have to setup | |
101 | * using address 0x10400 ... | |
102 | */ | |
103 | ||
104 | #include <asm/setup.h> | |
105 | ||
1da177e4 LT |
106 | static struct resource code_resource = { |
107 | .name = "Kernel code", | |
108 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
109 | }; | |
110 | ||
111 | static struct resource data_resource = { | |
112 | .name = "Kernel data", | |
113 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
114 | }; | |
115 | ||
116 | /* | |
117 | * cpu_init() initializes state that is per-CPU. | |
118 | */ | |
ea1f4eec | 119 | void __cpuinit cpu_init(void) |
1da177e4 | 120 | { |
1da177e4 LT |
121 | /* |
122 | * Store processor id in lowcore (used e.g. in timer_interrupt) | |
123 | */ | |
7b468488 | 124 | get_cpu_id(&S390_lowcore.cpu_id); |
1da177e4 LT |
125 | |
126 | /* | |
127 | * Force FPU initialization: | |
128 | */ | |
129 | clear_thread_flag(TIF_USEDFPU); | |
130 | clear_used_math(); | |
131 | ||
132 | atomic_inc(&init_mm.mm_count); | |
133 | current->active_mm = &init_mm; | |
6aa0d3a9 | 134 | BUG_ON(current->mm); |
1da177e4 LT |
135 | enter_lazy_tlb(&init_mm, current); |
136 | } | |
137 | ||
1da177e4 LT |
138 | /* |
139 | * condev= and conmode= setup parameter. | |
140 | */ | |
141 | ||
142 | static int __init condev_setup(char *str) | |
143 | { | |
144 | int vdev; | |
145 | ||
146 | vdev = simple_strtoul(str, &str, 0); | |
147 | if (vdev >= 0 && vdev < 65536) { | |
148 | console_devno = vdev; | |
149 | console_irq = -1; | |
150 | } | |
151 | return 1; | |
152 | } | |
153 | ||
154 | __setup("condev=", condev_setup); | |
155 | ||
156 | static int __init conmode_setup(char *str) | |
157 | { | |
8c0933ee | 158 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
159 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) |
160 | SET_CONSOLE_SCLP; | |
161 | #endif | |
162 | #if defined(CONFIG_TN3215_CONSOLE) | |
163 | if (strncmp(str, "3215", 5) == 0) | |
164 | SET_CONSOLE_3215; | |
165 | #endif | |
166 | #if defined(CONFIG_TN3270_CONSOLE) | |
167 | if (strncmp(str, "3270", 5) == 0) | |
168 | SET_CONSOLE_3270; | |
169 | #endif | |
170 | return 1; | |
171 | } | |
172 | ||
173 | __setup("conmode=", conmode_setup); | |
174 | ||
175 | static void __init conmode_default(void) | |
176 | { | |
177 | char query_buffer[1024]; | |
178 | char *ptr; | |
179 | ||
180 | if (MACHINE_IS_VM) { | |
740b5706 | 181 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
182 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
183 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
184 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
740b5706 | 185 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
186 | ptr = strstr(query_buffer, "CONMODE"); |
187 | /* | |
188 | * Set the conmode to 3215 so that the device recognition | |
189 | * will set the cu_type of the console to 3215. If the | |
190 | * conmode is 3270 and we don't set it back then both | |
191 | * 3215 and the 3270 driver will try to access the console | |
192 | * device (3215 as console and 3270 as normal tty). | |
193 | */ | |
740b5706 | 194 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 | 195 | if (ptr == NULL) { |
8c0933ee | 196 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
197 | SET_CONSOLE_SCLP; |
198 | #endif | |
199 | return; | |
200 | } | |
201 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
202 | #if defined(CONFIG_TN3270_CONSOLE) | |
203 | SET_CONSOLE_3270; | |
204 | #elif defined(CONFIG_TN3215_CONSOLE) | |
205 | SET_CONSOLE_3215; | |
8c0933ee | 206 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
207 | SET_CONSOLE_SCLP; |
208 | #endif | |
209 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
210 | #if defined(CONFIG_TN3215_CONSOLE) | |
211 | SET_CONSOLE_3215; | |
212 | #elif defined(CONFIG_TN3270_CONSOLE) | |
213 | SET_CONSOLE_3270; | |
8c0933ee | 214 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
215 | SET_CONSOLE_SCLP; |
216 | #endif | |
217 | } | |
1da177e4 | 218 | } else { |
8c0933ee | 219 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
220 | SET_CONSOLE_SCLP; |
221 | #endif | |
222 | } | |
223 | } | |
224 | ||
59f2e69d | 225 | #ifdef CONFIG_ZFCPDUMP |
411ed322 MH |
226 | static void __init setup_zfcpdump(unsigned int console_devno) |
227 | { | |
a0443fbb | 228 | static char str[41]; |
411ed322 MH |
229 | |
230 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) | |
231 | return; | |
232 | if (console_devno != -1) | |
a0443fbb | 233 | sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x", |
411ed322 MH |
234 | ipl_info.data.fcp.dev_id.devno, console_devno); |
235 | else | |
a0443fbb | 236 | sprintf(str, " cio_ignore=all,!0.0.%04x", |
411ed322 | 237 | ipl_info.data.fcp.dev_id.devno); |
a0443fbb | 238 | strcat(boot_command_line, str); |
411ed322 MH |
239 | console_loglevel = 2; |
240 | } | |
241 | #else | |
242 | static inline void setup_zfcpdump(unsigned int console_devno) {} | |
243 | #endif /* CONFIG_ZFCPDUMP */ | |
244 | ||
1da177e4 LT |
245 | /* |
246 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
247 | * _machine_halt or _machine_power_off. | |
248 | */ | |
249 | ||
250 | void machine_restart(char *command) | |
251 | { | |
7aa8dac7 | 252 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
06fa46a2 MS |
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_restart(command); |
259 | } | |
260 | ||
1da177e4 LT |
261 | void machine_halt(void) |
262 | { | |
06fa46a2 MS |
263 | if (!in_interrupt() || oops_in_progress) |
264 | /* | |
265 | * Only unblank the console if we are called in enabled | |
266 | * context or a bust_spinlocks cleared the way for us. | |
267 | */ | |
268 | console_unblank(); | |
1da177e4 LT |
269 | _machine_halt(); |
270 | } | |
271 | ||
1da177e4 LT |
272 | void machine_power_off(void) |
273 | { | |
06fa46a2 MS |
274 | if (!in_interrupt() || oops_in_progress) |
275 | /* | |
276 | * Only unblank the console if we are called in enabled | |
277 | * context or a bust_spinlocks cleared the way for us. | |
278 | */ | |
279 | console_unblank(); | |
1da177e4 LT |
280 | _machine_power_off(); |
281 | } | |
282 | ||
53df751c MS |
283 | /* |
284 | * Dummy power off function. | |
285 | */ | |
286 | void (*pm_power_off)(void) = machine_power_off; | |
287 | ||
59685296 HC |
288 | static int __init early_parse_mem(char *p) |
289 | { | |
290 | memory_end = memparse(p, &p); | |
23d75d9c | 291 | memory_end_set = 1; |
59685296 HC |
292 | return 0; |
293 | } | |
294 | early_param("mem", early_parse_mem); | |
295 | ||
c1821c2e GS |
296 | #ifdef CONFIG_S390_SWITCH_AMODE |
297 | unsigned int switch_amode = 0; | |
298 | EXPORT_SYMBOL_GPL(switch_amode); | |
299 | ||
3b6ed4ab MS |
300 | static int set_amode_and_uaccess(unsigned long user_amode, |
301 | unsigned long user32_amode) | |
c1821c2e GS |
302 | { |
303 | psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode | | |
304 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
305 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
306 | #ifdef CONFIG_COMPAT | |
307 | psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode | | |
308 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
309 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
310 | psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode | | |
311 | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | | |
312 | PSW32_MASK_PSTATE; | |
313 | #endif | |
314 | psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | | |
315 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY; | |
316 | ||
317 | if (MACHINE_HAS_MVCOS) { | |
c1821c2e | 318 | memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); |
3b6ed4ab | 319 | return 1; |
c1821c2e | 320 | } else { |
c1821c2e | 321 | memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); |
3b6ed4ab | 322 | return 0; |
c1821c2e GS |
323 | } |
324 | } | |
325 | ||
326 | /* | |
327 | * Switch kernel/user addressing modes? | |
328 | */ | |
329 | static int __init early_parse_switch_amode(char *p) | |
330 | { | |
331 | switch_amode = 1; | |
332 | return 0; | |
333 | } | |
334 | early_param("switch_amode", early_parse_switch_amode); | |
335 | ||
336 | #else /* CONFIG_S390_SWITCH_AMODE */ | |
3b6ed4ab MS |
337 | static inline int set_amode_and_uaccess(unsigned long user_amode, |
338 | unsigned long user32_amode) | |
c1821c2e | 339 | { |
3b6ed4ab | 340 | return 0; |
c1821c2e GS |
341 | } |
342 | #endif /* CONFIG_S390_SWITCH_AMODE */ | |
343 | ||
344 | #ifdef CONFIG_S390_EXEC_PROTECT | |
345 | unsigned int s390_noexec = 0; | |
346 | EXPORT_SYMBOL_GPL(s390_noexec); | |
347 | ||
348 | /* | |
349 | * Enable execute protection? | |
350 | */ | |
351 | static int __init early_parse_noexec(char *p) | |
352 | { | |
353 | if (!strncmp(p, "off", 3)) | |
354 | return 0; | |
355 | switch_amode = 1; | |
356 | s390_noexec = 1; | |
357 | return 0; | |
358 | } | |
359 | early_param("noexec", early_parse_noexec); | |
360 | #endif /* CONFIG_S390_EXEC_PROTECT */ | |
361 | ||
362 | static void setup_addressing_mode(void) | |
363 | { | |
364 | if (s390_noexec) { | |
3b6ed4ab MS |
365 | if (set_amode_and_uaccess(PSW_ASC_SECONDARY, |
366 | PSW32_ASC_SECONDARY)) | |
367 | pr_info("Execute protection active, " | |
368 | "mvcos available\n"); | |
369 | else | |
370 | pr_info("Execute protection active, " | |
371 | "mvcos not available\n"); | |
7af0d6f7 | 372 | } else if (switch_amode) { |
3b6ed4ab MS |
373 | if (set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY)) |
374 | pr_info("Address spaces switched, " | |
375 | "mvcos available\n"); | |
376 | else | |
377 | pr_info("Address spaces switched, " | |
378 | "mvcos not available\n"); | |
c1821c2e | 379 | } |
411788ea HC |
380 | #ifdef CONFIG_TRACE_IRQFLAGS |
381 | sysc_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; | |
382 | io_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; | |
383 | #endif | |
c1821c2e GS |
384 | } |
385 | ||
c9e37353 HC |
386 | static void __init |
387 | setup_lowcore(void) | |
388 | { | |
389 | struct _lowcore *lc; | |
390 | int lc_pages; | |
391 | ||
392 | /* | |
393 | * Setup lowcore for boot cpu | |
394 | */ | |
395 | lc_pages = sizeof(void *) == 8 ? 2 : 1; | |
396 | lc = (struct _lowcore *) | |
397 | __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); | |
398 | memset(lc, 0, lc_pages * PAGE_SIZE); | |
0b642ede | 399 | lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; |
c9e37353 HC |
400 | lc->restart_psw.addr = |
401 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; | |
c1821c2e GS |
402 | if (switch_amode) |
403 | lc->restart_psw.mask |= PSW_ASC_HOME; | |
404 | lc->external_new_psw.mask = psw_kernel_bits; | |
c9e37353 HC |
405 | lc->external_new_psw.addr = |
406 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
c1821c2e | 407 | lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_IO | PSW_MASK_EXT; |
c9e37353 | 408 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
c1821c2e | 409 | lc->program_new_psw.mask = psw_kernel_bits; |
c9e37353 HC |
410 | lc->program_new_psw.addr = |
411 | PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; | |
77fa2245 | 412 | lc->mcck_new_psw.mask = |
c1821c2e | 413 | psw_kernel_bits & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; |
c9e37353 HC |
414 | lc->mcck_new_psw.addr = |
415 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
c1821c2e | 416 | lc->io_new_psw.mask = psw_kernel_bits; |
c9e37353 | 417 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
5a62b192 | 418 | lc->clock_comparator = -1ULL; |
c9e37353 HC |
419 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; |
420 | lc->async_stack = (unsigned long) | |
421 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; | |
c9e37353 HC |
422 | lc->panic_stack = (unsigned long) |
423 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; | |
c9e37353 HC |
424 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
425 | lc->thread_info = (unsigned long) &init_thread_union; | |
25097bf1 | 426 | lc->machine_flags = S390_lowcore.machine_flags; |
347a8dc3 | 427 | #ifndef CONFIG_64BIT |
77fa2245 HC |
428 | if (MACHINE_HAS_IEEE) { |
429 | lc->extended_save_area_addr = (__u32) | |
430 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0); | |
431 | /* enable extended save area */ | |
c4972f33 | 432 | __ctl_set_bit(14, 29); |
77fa2245 | 433 | } |
c742b31c MS |
434 | #else |
435 | lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; | |
77fa2245 | 436 | #endif |
ab96e798 MS |
437 | lc->sync_enter_timer = S390_lowcore.sync_enter_timer; |
438 | lc->async_enter_timer = S390_lowcore.async_enter_timer; | |
439 | lc->exit_timer = S390_lowcore.exit_timer; | |
440 | lc->user_timer = S390_lowcore.user_timer; | |
441 | lc->system_timer = S390_lowcore.system_timer; | |
442 | lc->steal_timer = S390_lowcore.steal_timer; | |
443 | lc->last_update_timer = S390_lowcore.last_update_timer; | |
444 | lc->last_update_clock = S390_lowcore.last_update_clock; | |
c9e37353 | 445 | set_prefix((u32)(unsigned long) lc); |
099b7651 | 446 | lowcore_ptr[0] = lc; |
c9e37353 HC |
447 | } |
448 | ||
449 | static void __init | |
450 | setup_resources(void) | |
451 | { | |
fe355b7f | 452 | struct resource *res, *sub_res; |
c9e37353 HC |
453 | int i; |
454 | ||
cc13ad62 HC |
455 | code_resource.start = (unsigned long) &_text; |
456 | code_resource.end = (unsigned long) &_etext - 1; | |
457 | data_resource.start = (unsigned long) &_etext; | |
458 | data_resource.end = (unsigned long) &_edata - 1; | |
459 | ||
9f4b0ba8 HC |
460 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
461 | if (!memory_chunk[i].size) | |
462 | continue; | |
c9e37353 HC |
463 | res = alloc_bootmem_low(sizeof(struct resource)); |
464 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; | |
465 | switch (memory_chunk[i].type) { | |
466 | case CHUNK_READ_WRITE: | |
467 | res->name = "System RAM"; | |
468 | break; | |
469 | case CHUNK_READ_ONLY: | |
470 | res->name = "System ROM"; | |
471 | res->flags |= IORESOURCE_READONLY; | |
472 | break; | |
473 | default: | |
474 | res->name = "reserved"; | |
475 | } | |
476 | res->start = memory_chunk[i].addr; | |
477 | res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; | |
478 | request_resource(&iomem_resource, res); | |
fe355b7f HY |
479 | |
480 | if (code_resource.start >= res->start && | |
481 | code_resource.start <= res->end && | |
482 | code_resource.end > res->end) { | |
483 | sub_res = alloc_bootmem_low(sizeof(struct resource)); | |
484 | memcpy(sub_res, &code_resource, | |
485 | sizeof(struct resource)); | |
486 | sub_res->end = res->end; | |
487 | code_resource.start = res->end + 1; | |
488 | request_resource(res, sub_res); | |
489 | } | |
490 | ||
491 | if (code_resource.start >= res->start && | |
492 | code_resource.start <= res->end && | |
493 | code_resource.end <= res->end) | |
494 | request_resource(res, &code_resource); | |
495 | ||
496 | if (data_resource.start >= res->start && | |
497 | data_resource.start <= res->end && | |
498 | data_resource.end > res->end) { | |
499 | sub_res = alloc_bootmem_low(sizeof(struct resource)); | |
500 | memcpy(sub_res, &data_resource, | |
501 | sizeof(struct resource)); | |
502 | sub_res->end = res->end; | |
503 | data_resource.start = res->end + 1; | |
504 | request_resource(res, sub_res); | |
505 | } | |
506 | ||
507 | if (data_resource.start >= res->start && | |
508 | data_resource.start <= res->end && | |
509 | data_resource.end <= res->end) | |
510 | request_resource(res, &data_resource); | |
c9e37353 HC |
511 | } |
512 | } | |
513 | ||
411ed322 MH |
514 | unsigned long real_memory_size; |
515 | EXPORT_SYMBOL_GPL(real_memory_size); | |
516 | ||
8b62bc96 HC |
517 | static void __init setup_memory_end(void) |
518 | { | |
411ed322 | 519 | unsigned long memory_size; |
5fd9c6e2 | 520 | unsigned long max_mem; |
8b62bc96 HC |
521 | int i; |
522 | ||
59f2e69d | 523 | #ifdef CONFIG_ZFCPDUMP |
23d75d9c | 524 | if (ipl_info.type == IPL_TYPE_FCP_DUMP) { |
411ed322 | 525 | memory_end = ZFCPDUMP_HSA_SIZE; |
23d75d9c HC |
526 | memory_end_set = 1; |
527 | } | |
411ed322 MH |
528 | #endif |
529 | memory_size = 0; | |
8b62bc96 HC |
530 | memory_end &= PAGE_MASK; |
531 | ||
0189103c | 532 | max_mem = memory_end ? min(VMEM_MAX_PHYS, memory_end) : VMEM_MAX_PHYS; |
5fd9c6e2 | 533 | memory_end = min(max_mem, memory_end); |
8b62bc96 | 534 | |
9f4b0ba8 HC |
535 | /* |
536 | * Make sure all chunks are MAX_ORDER aligned so we don't need the | |
537 | * extra checks that HOLES_IN_ZONE would require. | |
538 | */ | |
539 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
540 | unsigned long start, end; | |
541 | struct mem_chunk *chunk; | |
542 | unsigned long align; | |
543 | ||
544 | chunk = &memory_chunk[i]; | |
545 | align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); | |
546 | start = (chunk->addr + align - 1) & ~(align - 1); | |
547 | end = (chunk->addr + chunk->size) & ~(align - 1); | |
548 | if (start >= end) | |
549 | memset(chunk, 0, sizeof(*chunk)); | |
550 | else { | |
551 | chunk->addr = start; | |
552 | chunk->size = end - start; | |
553 | } | |
554 | } | |
555 | ||
8b62bc96 HC |
556 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
557 | struct mem_chunk *chunk = &memory_chunk[i]; | |
558 | ||
411ed322 MH |
559 | real_memory_size = max(real_memory_size, |
560 | chunk->addr + chunk->size); | |
8b62bc96 HC |
561 | if (chunk->addr >= max_mem) { |
562 | memset(chunk, 0, sizeof(*chunk)); | |
563 | continue; | |
564 | } | |
565 | if (chunk->addr + chunk->size > max_mem) | |
566 | chunk->size = max_mem - chunk->addr; | |
567 | memory_size = max(memory_size, chunk->addr + chunk->size); | |
568 | } | |
569 | if (!memory_end) | |
570 | memory_end = memory_size; | |
8b62bc96 HC |
571 | } |
572 | ||
c9e37353 HC |
573 | static void __init |
574 | setup_memory(void) | |
575 | { | |
576 | unsigned long bootmap_size; | |
fe355b7f | 577 | unsigned long start_pfn, end_pfn; |
c9e37353 | 578 | int i; |
1da177e4 LT |
579 | |
580 | /* | |
581 | * partially used pages are not usable - thus | |
582 | * we are rounding upwards: | |
583 | */ | |
65912a84 HC |
584 | start_pfn = PFN_UP(__pa(&_end)); |
585 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 586 | |
65912a84 HC |
587 | #ifdef CONFIG_BLK_DEV_INITRD |
588 | /* | |
589 | * Move the initrd in case the bitmap of the bootmem allocater | |
590 | * would overwrite it. | |
591 | */ | |
592 | ||
593 | if (INITRD_START && INITRD_SIZE) { | |
594 | unsigned long bmap_size; | |
595 | unsigned long start; | |
596 | ||
597 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
598 | bmap_size = PFN_PHYS(bmap_size); | |
599 | ||
600 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
601 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
602 | ||
603 | if (start + INITRD_SIZE > memory_end) { | |
3b6ed4ab MS |
604 | pr_err("initrd extends beyond end of " |
605 | "memory (0x%08lx > 0x%08lx) " | |
65912a84 HC |
606 | "disabling initrd\n", |
607 | start + INITRD_SIZE, memory_end); | |
608 | INITRD_START = INITRD_SIZE = 0; | |
609 | } else { | |
3b6ed4ab MS |
610 | pr_info("Moving initrd (0x%08lx -> " |
611 | "0x%08lx, size: %ld)\n", | |
612 | INITRD_START, start, INITRD_SIZE); | |
65912a84 HC |
613 | memmove((void *) start, (void *) INITRD_START, |
614 | INITRD_SIZE); | |
615 | INITRD_START = start; | |
616 | } | |
617 | } | |
618 | } | |
619 | #endif | |
620 | ||
1da177e4 | 621 | /* |
7676bef9 | 622 | * Initialize the boot-time allocator |
1da177e4 LT |
623 | */ |
624 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
625 | ||
626 | /* | |
627 | * Register RAM areas with the bootmem allocator. | |
628 | */ | |
c9e37353 | 629 | |
0b642ede | 630 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
39b742f9 | 631 | unsigned long start_chunk, end_chunk, pfn; |
1da177e4 LT |
632 | |
633 | if (memory_chunk[i].type != CHUNK_READ_WRITE) | |
634 | continue; | |
39b742f9 | 635 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
fb2e7c5e | 636 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |
39b742f9 HC |
637 | end_chunk = min(end_chunk, end_pfn); |
638 | if (start_chunk >= end_chunk) | |
639 | continue; | |
640 | add_active_range(0, start_chunk, end_chunk); | |
641 | pfn = max(start_chunk, start_pfn); | |
fb2e7c5e | 642 | for (; pfn < end_chunk; pfn++) |
39b742f9 | 643 | page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY); |
1da177e4 LT |
644 | } |
645 | ||
0b642ede PO |
646 | psw_set_key(PAGE_DEFAULT_KEY); |
647 | ||
39b742f9 | 648 | free_bootmem_with_active_regions(0, max_pfn); |
c9e37353 | 649 | |
615b04b3 HC |
650 | /* |
651 | * Reserve memory used for lowcore/command line/kernel image. | |
652 | */ | |
72a7fe39 | 653 | reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
615b04b3 | 654 | reserve_bootmem((unsigned long)_stext, |
72a7fe39 BW |
655 | PFN_PHYS(start_pfn) - (unsigned long)_stext, |
656 | BOOTMEM_DEFAULT); | |
c9e37353 HC |
657 | /* |
658 | * Reserve the bootmem bitmap itself as well. We do this in two | |
659 | * steps (first step was init_bootmem()) because this catches | |
660 | * the (very unlikely) case of us accidentally initializing the | |
661 | * bootmem allocator with an invalid RAM area. | |
662 | */ | |
72a7fe39 BW |
663 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, |
664 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
665 | |
666 | #ifdef CONFIG_BLK_DEV_INITRD | |
65912a84 | 667 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 | 668 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
72a7fe39 BW |
669 | reserve_bootmem(INITRD_START, INITRD_SIZE, |
670 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
671 | initrd_start = INITRD_START; |
672 | initrd_end = initrd_start + INITRD_SIZE; | |
673 | } else { | |
3b6ed4ab MS |
674 | pr_err("initrd extends beyond end of " |
675 | "memory (0x%08lx > 0x%08lx) " | |
676 | "disabling initrd\n", | |
c9e37353 HC |
677 | initrd_start + INITRD_SIZE, memory_end); |
678 | initrd_start = initrd_end = 0; | |
1da177e4 | 679 | } |
c9e37353 | 680 | } |
1da177e4 | 681 | #endif |
c9e37353 | 682 | } |
1da177e4 | 683 | |
cf8ba7a9 MS |
684 | /* |
685 | * Setup hardware capabilities. | |
686 | */ | |
687 | static void __init setup_hwcaps(void) | |
688 | { | |
689 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; | |
cf8ba7a9 MS |
690 | unsigned long long facility_list_extended; |
691 | unsigned int facility_list; | |
692 | int i; | |
693 | ||
694 | facility_list = stfl(); | |
695 | /* | |
696 | * The store facility list bits numbers as found in the principles | |
697 | * of operation are numbered with bit 1UL<<31 as number 0 to | |
698 | * bit 1UL<<0 as number 31. | |
699 | * Bit 0: instructions named N3, "backported" to esa-mode | |
700 | * Bit 2: z/Architecture mode is active | |
701 | * Bit 7: the store-facility-list-extended facility is installed | |
702 | * Bit 17: the message-security assist is installed | |
703 | * Bit 19: the long-displacement facility is installed | |
704 | * Bit 21: the extended-immediate facility is installed | |
488253ce AK |
705 | * Bit 22: extended-translation facility 3 is installed |
706 | * Bit 30: extended-translation facility 3 enhancement facility | |
cf8ba7a9 MS |
707 | * These get translated to: |
708 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, | |
709 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, | |
488253ce AK |
710 | * HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and |
711 | * HWCAP_S390_ETF3EH bit 8 (22 && 30). | |
cf8ba7a9 MS |
712 | */ |
713 | for (i = 0; i < 6; i++) | |
714 | if (facility_list & (1UL << (31 - stfl_bits[i]))) | |
715 | elf_hwcap |= 1UL << i; | |
716 | ||
488253ce AK |
717 | if ((facility_list & (1UL << (31 - 22))) |
718 | && (facility_list & (1UL << (31 - 30)))) | |
719 | elf_hwcap |= 1UL << 8; | |
720 | ||
cf8ba7a9 MS |
721 | /* |
722 | * Check for additional facilities with store-facility-list-extended. | |
723 | * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 | |
724 | * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information | |
725 | * as stored by stfl, bits 32-xxx contain additional facilities. | |
726 | * How many facility words are stored depends on the number of | |
727 | * doublewords passed to the instruction. The additional facilites | |
728 | * are: | |
2ac3307f CE |
729 | * Bit 42: decimal floating point facility is installed |
730 | * Bit 44: perform floating point operation facility is installed | |
cf8ba7a9 | 731 | * translated to: |
488253ce | 732 | * HWCAP_S390_DFP bit 6 (42 && 44). |
cf8ba7a9 MS |
733 | */ |
734 | if ((elf_hwcap & (1UL << 2)) && | |
7b758389 | 735 | __stfle(&facility_list_extended, 1) > 0) { |
2ac3307f | 736 | if ((facility_list_extended & (1ULL << (63 - 42))) |
488253ce | 737 | && (facility_list_extended & (1ULL << (63 - 44)))) |
cf8ba7a9 MS |
738 | elf_hwcap |= 1UL << 6; |
739 | } | |
740 | ||
53492b1d GS |
741 | if (MACHINE_HAS_HPAGE) |
742 | elf_hwcap |= 1UL << 7; | |
743 | ||
7b468488 | 744 | switch (S390_lowcore.cpu_id.machine) { |
cf8ba7a9 MS |
745 | case 0x9672: |
746 | #if !defined(CONFIG_64BIT) | |
747 | default: /* Use "g5" as default for 31 bit kernels. */ | |
748 | #endif | |
749 | strcpy(elf_platform, "g5"); | |
750 | break; | |
751 | case 0x2064: | |
752 | case 0x2066: | |
753 | #if defined(CONFIG_64BIT) | |
754 | default: /* Use "z900" as default for 64 bit kernels. */ | |
755 | #endif | |
756 | strcpy(elf_platform, "z900"); | |
757 | break; | |
758 | case 0x2084: | |
759 | case 0x2086: | |
760 | strcpy(elf_platform, "z990"); | |
761 | break; | |
762 | case 0x2094: | |
9fee8db2 | 763 | case 0x2096: |
cf8ba7a9 MS |
764 | strcpy(elf_platform, "z9-109"); |
765 | break; | |
9fee8db2 MS |
766 | case 0x2097: |
767 | case 0x2098: | |
768 | strcpy(elf_platform, "z10"); | |
769 | break; | |
cf8ba7a9 MS |
770 | } |
771 | } | |
772 | ||
c9e37353 HC |
773 | /* |
774 | * Setup function called from init/main.c just after the banner | |
775 | * was printed. | |
776 | */ | |
1da177e4 | 777 | |
c9e37353 HC |
778 | void __init |
779 | setup_arch(char **cmdline_p) | |
780 | { | |
0946100f HB |
781 | /* set up preferred console */ |
782 | add_preferred_console("ttyS", 0, NULL); | |
783 | ||
1da177e4 | 784 | /* |
c9e37353 | 785 | * print what head.S has found out about the machine |
1da177e4 | 786 | */ |
347a8dc3 | 787 | #ifndef CONFIG_64BIT |
3b6ed4ab MS |
788 | if (MACHINE_IS_VM) |
789 | pr_info("Linux is running as a z/VM " | |
790 | "guest operating system in 31-bit mode\n"); | |
791 | else | |
792 | pr_info("Linux is running natively in 31-bit mode\n"); | |
793 | if (MACHINE_HAS_IEEE) | |
794 | pr_info("The hardware system has IEEE compatible " | |
795 | "floating point units\n"); | |
796 | else | |
797 | pr_info("The hardware system has no IEEE compatible " | |
798 | "floating point units\n"); | |
347a8dc3 | 799 | #else /* CONFIG_64BIT */ |
fa587743 | 800 | if (MACHINE_IS_VM) |
3b6ed4ab MS |
801 | pr_info("Linux is running as a z/VM " |
802 | "guest operating system in 64-bit mode\n"); | |
fa587743 | 803 | else if (MACHINE_IS_KVM) { |
3b6ed4ab | 804 | pr_info("Linux is running under KVM in 64-bit mode\n"); |
faeba830 CB |
805 | add_preferred_console("hvc", 0, NULL); |
806 | s390_virtio_console_init(); | |
fa587743 | 807 | } else |
3b6ed4ab | 808 | pr_info("Linux is running natively in 64-bit mode\n"); |
347a8dc3 | 809 | #endif /* CONFIG_64BIT */ |
c9e37353 | 810 | |
a0443fbb HB |
811 | /* Have one command line that is parsed and saved in /proc/cmdline */ |
812 | /* boot_command_line has been already set up in early.c */ | |
813 | *cmdline_p = boot_command_line; | |
59685296 | 814 | |
c9e37353 | 815 | ROOT_DEV = Root_RAM0; |
59685296 HC |
816 | |
817 | init_mm.start_code = PAGE_OFFSET; | |
818 | init_mm.end_code = (unsigned long) &_etext; | |
819 | init_mm.end_data = (unsigned long) &_edata; | |
820 | init_mm.brk = (unsigned long) &_end; | |
821 | ||
6c2a9e6d GS |
822 | if (MACHINE_HAS_MVCOS) |
823 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); | |
824 | else | |
825 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); | |
826 | ||
59685296 HC |
827 | parse_early_param(); |
828 | ||
99ca4e58 | 829 | setup_ipl(); |
8b62bc96 | 830 | setup_memory_end(); |
c1821c2e | 831 | setup_addressing_mode(); |
c9e37353 HC |
832 | setup_memory(); |
833 | setup_resources(); | |
834 | setup_lowcore(); | |
835 | ||
1da177e4 | 836 | cpu_init(); |
7b468488 | 837 | __cpu_logical_map[0] = stap(); |
dbd70fb4 | 838 | s390_init_cpu_topology(); |
1da177e4 | 839 | |
cf8ba7a9 MS |
840 | /* |
841 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). | |
842 | */ | |
843 | setup_hwcaps(); | |
844 | ||
1da177e4 LT |
845 | /* |
846 | * Create kernel page tables and switch to virtual addressing. | |
847 | */ | |
848 | paging_init(); | |
849 | ||
850 | /* Setup default console */ | |
851 | conmode_default(); | |
411ed322 MH |
852 | |
853 | /* Setup zfcpdump support */ | |
854 | setup_zfcpdump(console_devno); | |
1da177e4 | 855 | } |