Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * arch/s390/kernel/setup.c | |
3 | * | |
4 | * S390 version | |
cd3b70f5 | 5 | * Copyright (C) IBM Corp. 1999,2010 |
1da177e4 LT |
6 | * Author(s): Hartmut Penner (hp@de.ibm.com), |
7 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
8 | * | |
9 | * Derived from "arch/i386/kernel/setup.c" | |
10 | * Copyright (C) 1995, Linus Torvalds | |
11 | */ | |
12 | ||
13 | /* | |
14 | * This file handles the architecture-dependent parts of initialization | |
15 | */ | |
16 | ||
3b6ed4ab MS |
17 | #define KMSG_COMPONENT "setup" |
18 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
19 | ||
1da177e4 LT |
20 | #include <linux/errno.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/stddef.h> | |
26 | #include <linux/unistd.h> | |
27 | #include <linux/ptrace.h> | |
1da177e4 | 28 | #include <linux/user.h> |
1da177e4 LT |
29 | #include <linux/tty.h> |
30 | #include <linux/ioport.h> | |
31 | #include <linux/delay.h> | |
1da177e4 LT |
32 | #include <linux/init.h> |
33 | #include <linux/initrd.h> | |
34 | #include <linux/bootmem.h> | |
35 | #include <linux/root_dev.h> | |
36 | #include <linux/console.h> | |
1da177e4 | 37 | #include <linux/kernel_stat.h> |
1e8e3383 | 38 | #include <linux/device.h> |
585c3047 | 39 | #include <linux/notifier.h> |
65912a84 | 40 | #include <linux/pfn.h> |
fe355b7f | 41 | #include <linux/ctype.h> |
2b67fc46 | 42 | #include <linux/reboot.h> |
dbd70fb4 | 43 | #include <linux/topology.h> |
dfd9f7ab | 44 | #include <linux/ftrace.h> |
1da177e4 | 45 | |
46b05d26 | 46 | #include <asm/ipl.h> |
1da177e4 LT |
47 | #include <asm/uaccess.h> |
48 | #include <asm/system.h> | |
49 | #include <asm/smp.h> | |
50 | #include <asm/mmu_context.h> | |
51 | #include <asm/cpcmd.h> | |
52 | #include <asm/lowcore.h> | |
53 | #include <asm/irq.h> | |
0b642ede PO |
54 | #include <asm/page.h> |
55 | #include <asm/ptrace.h> | |
cc13ad62 | 56 | #include <asm/sections.h> |
fe355b7f | 57 | #include <asm/ebcdic.h> |
c1821c2e | 58 | #include <asm/compat.h> |
faeba830 | 59 | #include <asm/kvm_virtio.h> |
c1821c2e GS |
60 | |
61 | long psw_kernel_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | | |
62 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY); | |
63 | long psw_user_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | | |
64 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
65 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY); | |
1da177e4 | 66 | |
d02765d1 GS |
67 | /* |
68 | * User copy operations. | |
69 | */ | |
70 | struct uaccess_ops uaccess; | |
d4ee453b | 71 | EXPORT_SYMBOL(uaccess); |
d02765d1 | 72 | |
1da177e4 LT |
73 | /* |
74 | * Machine setup.. | |
75 | */ | |
76 | unsigned int console_mode = 0; | |
1485c5c8 HC |
77 | EXPORT_SYMBOL(console_mode); |
78 | ||
1da177e4 | 79 | unsigned int console_devno = -1; |
1485c5c8 HC |
80 | EXPORT_SYMBOL(console_devno); |
81 | ||
1da177e4 | 82 | unsigned int console_irq = -1; |
1485c5c8 HC |
83 | EXPORT_SYMBOL(console_irq); |
84 | ||
cf8ba7a9 MS |
85 | unsigned long elf_hwcap = 0; |
86 | char elf_platform[ELF_PLATFORM_SIZE]; | |
36a2bd42 | 87 | |
23d17421 | 88 | struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
23d75d9c HC |
89 | |
90 | int __initdata memory_end_set; | |
91 | unsigned long __initdata memory_end; | |
1da177e4 | 92 | |
099b7651 FM |
93 | /* An array with a pointer to the lowcore of every CPU. */ |
94 | struct _lowcore *lowcore_ptr[NR_CPUS]; | |
95 | EXPORT_SYMBOL(lowcore_ptr); | |
96 | ||
1da177e4 LT |
97 | /* |
98 | * This is set up by the setup-routine at boot-time | |
99 | * for S390 need to find out, what we have to setup | |
100 | * using address 0x10400 ... | |
101 | */ | |
102 | ||
103 | #include <asm/setup.h> | |
104 | ||
1da177e4 LT |
105 | static struct resource code_resource = { |
106 | .name = "Kernel code", | |
107 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
108 | }; | |
109 | ||
110 | static struct resource data_resource = { | |
111 | .name = "Kernel data", | |
112 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
113 | }; | |
114 | ||
1da177e4 LT |
115 | /* |
116 | * condev= and conmode= setup parameter. | |
117 | */ | |
118 | ||
119 | static int __init condev_setup(char *str) | |
120 | { | |
121 | int vdev; | |
122 | ||
123 | vdev = simple_strtoul(str, &str, 0); | |
124 | if (vdev >= 0 && vdev < 65536) { | |
125 | console_devno = vdev; | |
126 | console_irq = -1; | |
127 | } | |
128 | return 1; | |
129 | } | |
130 | ||
131 | __setup("condev=", condev_setup); | |
132 | ||
637952ca HB |
133 | static void __init set_preferred_console(void) |
134 | { | |
c4de0c1a | 135 | if (MACHINE_IS_KVM) |
637952ca | 136 | add_preferred_console("hvc", 0, NULL); |
c4de0c1a | 137 | else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) |
637952ca | 138 | add_preferred_console("ttyS", 0, NULL); |
c4de0c1a | 139 | else if (CONSOLE_IS_3270) |
637952ca HB |
140 | add_preferred_console("tty3270", 0, NULL); |
141 | } | |
142 | ||
1da177e4 LT |
143 | static int __init conmode_setup(char *str) |
144 | { | |
8c0933ee | 145 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
146 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) |
147 | SET_CONSOLE_SCLP; | |
148 | #endif | |
149 | #if defined(CONFIG_TN3215_CONSOLE) | |
150 | if (strncmp(str, "3215", 5) == 0) | |
151 | SET_CONSOLE_3215; | |
152 | #endif | |
153 | #if defined(CONFIG_TN3270_CONSOLE) | |
154 | if (strncmp(str, "3270", 5) == 0) | |
155 | SET_CONSOLE_3270; | |
156 | #endif | |
637952ca | 157 | set_preferred_console(); |
1da177e4 LT |
158 | return 1; |
159 | } | |
160 | ||
161 | __setup("conmode=", conmode_setup); | |
162 | ||
163 | static void __init conmode_default(void) | |
164 | { | |
165 | char query_buffer[1024]; | |
166 | char *ptr; | |
167 | ||
168 | if (MACHINE_IS_VM) { | |
740b5706 | 169 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
1da177e4 LT |
170 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
171 | ptr = strstr(query_buffer, "SUBCHANNEL ="); | |
172 | console_irq = simple_strtoul(ptr + 13, NULL, 16); | |
740b5706 | 173 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
1da177e4 LT |
174 | ptr = strstr(query_buffer, "CONMODE"); |
175 | /* | |
176 | * Set the conmode to 3215 so that the device recognition | |
177 | * will set the cu_type of the console to 3215. If the | |
178 | * conmode is 3270 and we don't set it back then both | |
179 | * 3215 and the 3270 driver will try to access the console | |
180 | * device (3215 as console and 3270 as normal tty). | |
181 | */ | |
740b5706 | 182 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
1da177e4 | 183 | if (ptr == NULL) { |
8c0933ee | 184 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
185 | SET_CONSOLE_SCLP; |
186 | #endif | |
187 | return; | |
188 | } | |
189 | if (strncmp(ptr + 8, "3270", 4) == 0) { | |
190 | #if defined(CONFIG_TN3270_CONSOLE) | |
191 | SET_CONSOLE_3270; | |
192 | #elif defined(CONFIG_TN3215_CONSOLE) | |
193 | SET_CONSOLE_3215; | |
8c0933ee | 194 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
195 | SET_CONSOLE_SCLP; |
196 | #endif | |
197 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { | |
198 | #if defined(CONFIG_TN3215_CONSOLE) | |
199 | SET_CONSOLE_3215; | |
200 | #elif defined(CONFIG_TN3270_CONSOLE) | |
201 | SET_CONSOLE_3270; | |
8c0933ee | 202 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
203 | SET_CONSOLE_SCLP; |
204 | #endif | |
205 | } | |
1da177e4 | 206 | } else { |
8c0933ee | 207 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
1da177e4 LT |
208 | SET_CONSOLE_SCLP; |
209 | #endif | |
210 | } | |
211 | } | |
212 | ||
59f2e69d | 213 | #ifdef CONFIG_ZFCPDUMP |
411ed322 MH |
214 | static void __init setup_zfcpdump(unsigned int console_devno) |
215 | { | |
a0443fbb | 216 | static char str[41]; |
411ed322 MH |
217 | |
218 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) | |
219 | return; | |
220 | if (console_devno != -1) | |
a0443fbb | 221 | sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x", |
411ed322 MH |
222 | ipl_info.data.fcp.dev_id.devno, console_devno); |
223 | else | |
a0443fbb | 224 | sprintf(str, " cio_ignore=all,!0.0.%04x", |
411ed322 | 225 | ipl_info.data.fcp.dev_id.devno); |
a0443fbb | 226 | strcat(boot_command_line, str); |
411ed322 MH |
227 | console_loglevel = 2; |
228 | } | |
229 | #else | |
230 | static inline void setup_zfcpdump(unsigned int console_devno) {} | |
231 | #endif /* CONFIG_ZFCPDUMP */ | |
232 | ||
1da177e4 LT |
233 | /* |
234 | * Reboot, halt and power_off stubs. They just call _machine_restart, | |
235 | * _machine_halt or _machine_power_off. | |
236 | */ | |
237 | ||
238 | void machine_restart(char *command) | |
239 | { | |
7aa8dac7 | 240 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
06fa46a2 MS |
241 | /* |
242 | * Only unblank the console if we are called in enabled | |
243 | * context or a bust_spinlocks cleared the way for us. | |
244 | */ | |
245 | console_unblank(); | |
1da177e4 LT |
246 | _machine_restart(command); |
247 | } | |
248 | ||
1da177e4 LT |
249 | void machine_halt(void) |
250 | { | |
06fa46a2 MS |
251 | if (!in_interrupt() || oops_in_progress) |
252 | /* | |
253 | * Only unblank the console if we are called in enabled | |
254 | * context or a bust_spinlocks cleared the way for us. | |
255 | */ | |
256 | console_unblank(); | |
1da177e4 LT |
257 | _machine_halt(); |
258 | } | |
259 | ||
1da177e4 LT |
260 | void machine_power_off(void) |
261 | { | |
06fa46a2 MS |
262 | if (!in_interrupt() || oops_in_progress) |
263 | /* | |
264 | * Only unblank the console if we are called in enabled | |
265 | * context or a bust_spinlocks cleared the way for us. | |
266 | */ | |
267 | console_unblank(); | |
1da177e4 LT |
268 | _machine_power_off(); |
269 | } | |
270 | ||
53df751c MS |
271 | /* |
272 | * Dummy power off function. | |
273 | */ | |
274 | void (*pm_power_off)(void) = machine_power_off; | |
275 | ||
59685296 HC |
276 | static int __init early_parse_mem(char *p) |
277 | { | |
278 | memory_end = memparse(p, &p); | |
23d75d9c | 279 | memory_end_set = 1; |
59685296 HC |
280 | return 0; |
281 | } | |
282 | early_param("mem", early_parse_mem); | |
283 | ||
b11b5334 MS |
284 | unsigned int user_mode = HOME_SPACE_MODE; |
285 | EXPORT_SYMBOL_GPL(user_mode); | |
c1821c2e | 286 | |
3b6ed4ab MS |
287 | static int set_amode_and_uaccess(unsigned long user_amode, |
288 | unsigned long user32_amode) | |
c1821c2e GS |
289 | { |
290 | psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode | | |
291 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
292 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
293 | #ifdef CONFIG_COMPAT | |
294 | psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode | | |
295 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
296 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; | |
297 | psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode | | |
298 | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | | |
299 | PSW32_MASK_PSTATE; | |
300 | #endif | |
301 | psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | | |
302 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY; | |
303 | ||
304 | if (MACHINE_HAS_MVCOS) { | |
c1821c2e | 305 | memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); |
3b6ed4ab | 306 | return 1; |
c1821c2e | 307 | } else { |
c1821c2e | 308 | memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); |
3b6ed4ab | 309 | return 0; |
c1821c2e GS |
310 | } |
311 | } | |
312 | ||
313 | /* | |
314 | * Switch kernel/user addressing modes? | |
315 | */ | |
316 | static int __init early_parse_switch_amode(char *p) | |
317 | { | |
b11b5334 MS |
318 | if (user_mode != SECONDARY_SPACE_MODE) |
319 | user_mode = PRIMARY_SPACE_MODE; | |
c1821c2e GS |
320 | return 0; |
321 | } | |
322 | early_param("switch_amode", early_parse_switch_amode); | |
323 | ||
b11b5334 | 324 | static int __init early_parse_user_mode(char *p) |
c1821c2e | 325 | { |
b11b5334 MS |
326 | if (p && strcmp(p, "primary") == 0) |
327 | user_mode = PRIMARY_SPACE_MODE; | |
328 | #ifdef CONFIG_S390_EXEC_PROTECT | |
329 | else if (p && strcmp(p, "secondary") == 0) | |
330 | user_mode = SECONDARY_SPACE_MODE; | |
331 | #endif | |
332 | else if (!p || strcmp(p, "home") == 0) | |
333 | user_mode = HOME_SPACE_MODE; | |
334 | else | |
335 | return 1; | |
3b6ed4ab | 336 | return 0; |
c1821c2e | 337 | } |
b11b5334 | 338 | early_param("user_mode", early_parse_user_mode); |
c1821c2e GS |
339 | |
340 | #ifdef CONFIG_S390_EXEC_PROTECT | |
c1821c2e GS |
341 | /* |
342 | * Enable execute protection? | |
343 | */ | |
344 | static int __init early_parse_noexec(char *p) | |
345 | { | |
346 | if (!strncmp(p, "off", 3)) | |
347 | return 0; | |
b11b5334 | 348 | user_mode = SECONDARY_SPACE_MODE; |
c1821c2e GS |
349 | return 0; |
350 | } | |
351 | early_param("noexec", early_parse_noexec); | |
352 | #endif /* CONFIG_S390_EXEC_PROTECT */ | |
353 | ||
354 | static void setup_addressing_mode(void) | |
355 | { | |
b11b5334 | 356 | if (user_mode == SECONDARY_SPACE_MODE) { |
3b6ed4ab MS |
357 | if (set_amode_and_uaccess(PSW_ASC_SECONDARY, |
358 | PSW32_ASC_SECONDARY)) | |
359 | pr_info("Execute protection active, " | |
360 | "mvcos available\n"); | |
361 | else | |
362 | pr_info("Execute protection active, " | |
363 | "mvcos not available\n"); | |
b11b5334 | 364 | } else if (user_mode == PRIMARY_SPACE_MODE) { |
3b6ed4ab MS |
365 | if (set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY)) |
366 | pr_info("Address spaces switched, " | |
367 | "mvcos available\n"); | |
368 | else | |
369 | pr_info("Address spaces switched, " | |
370 | "mvcos not available\n"); | |
c1821c2e GS |
371 | } |
372 | } | |
373 | ||
c9e37353 HC |
374 | static void __init |
375 | setup_lowcore(void) | |
376 | { | |
377 | struct _lowcore *lc; | |
c9e37353 HC |
378 | |
379 | /* | |
380 | * Setup lowcore for boot cpu | |
381 | */ | |
cbb870c8 | 382 | BUILD_BUG_ON(sizeof(struct _lowcore) != LC_PAGES * 4096); |
a0878656 | 383 | lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0); |
0b642ede | 384 | lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; |
c9e37353 HC |
385 | lc->restart_psw.addr = |
386 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; | |
b11b5334 | 387 | if (user_mode != HOME_SPACE_MODE) |
c1821c2e GS |
388 | lc->restart_psw.mask |= PSW_ASC_HOME; |
389 | lc->external_new_psw.mask = psw_kernel_bits; | |
c9e37353 HC |
390 | lc->external_new_psw.addr = |
391 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; | |
c1821c2e | 392 | lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_IO | PSW_MASK_EXT; |
c9e37353 | 393 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
c1821c2e | 394 | lc->program_new_psw.mask = psw_kernel_bits; |
c9e37353 HC |
395 | lc->program_new_psw.addr = |
396 | PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; | |
77fa2245 | 397 | lc->mcck_new_psw.mask = |
c1821c2e | 398 | psw_kernel_bits & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; |
c9e37353 HC |
399 | lc->mcck_new_psw.addr = |
400 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; | |
c1821c2e | 401 | lc->io_new_psw.mask = psw_kernel_bits; |
c9e37353 | 402 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
5a62b192 | 403 | lc->clock_comparator = -1ULL; |
c9e37353 HC |
404 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; |
405 | lc->async_stack = (unsigned long) | |
406 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; | |
c9e37353 HC |
407 | lc->panic_stack = (unsigned long) |
408 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; | |
c9e37353 HC |
409 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
410 | lc->thread_info = (unsigned long) &init_thread_union; | |
25097bf1 | 411 | lc->machine_flags = S390_lowcore.machine_flags; |
14375bc4 MS |
412 | lc->stfl_fac_list = S390_lowcore.stfl_fac_list; |
413 | memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, | |
414 | MAX_FACILITY_BIT/8); | |
347a8dc3 | 415 | #ifndef CONFIG_64BIT |
77fa2245 HC |
416 | if (MACHINE_HAS_IEEE) { |
417 | lc->extended_save_area_addr = (__u32) | |
a0878656 | 418 | __alloc_bootmem_low(PAGE_SIZE, PAGE_SIZE, 0); |
77fa2245 | 419 | /* enable extended save area */ |
c4972f33 | 420 | __ctl_set_bit(14, 29); |
77fa2245 | 421 | } |
c742b31c | 422 | #else |
215b3096 | 423 | lc->cmf_hpp = -1ULL; |
c742b31c | 424 | lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; |
77fa2245 | 425 | #endif |
ab96e798 MS |
426 | lc->sync_enter_timer = S390_lowcore.sync_enter_timer; |
427 | lc->async_enter_timer = S390_lowcore.async_enter_timer; | |
428 | lc->exit_timer = S390_lowcore.exit_timer; | |
429 | lc->user_timer = S390_lowcore.user_timer; | |
430 | lc->system_timer = S390_lowcore.system_timer; | |
431 | lc->steal_timer = S390_lowcore.steal_timer; | |
432 | lc->last_update_timer = S390_lowcore.last_update_timer; | |
433 | lc->last_update_clock = S390_lowcore.last_update_clock; | |
dfd9f7ab | 434 | lc->ftrace_func = S390_lowcore.ftrace_func; |
c9e37353 | 435 | set_prefix((u32)(unsigned long) lc); |
099b7651 | 436 | lowcore_ptr[0] = lc; |
c9e37353 HC |
437 | } |
438 | ||
439 | static void __init | |
440 | setup_resources(void) | |
441 | { | |
fe355b7f | 442 | struct resource *res, *sub_res; |
c9e37353 HC |
443 | int i; |
444 | ||
cc13ad62 HC |
445 | code_resource.start = (unsigned long) &_text; |
446 | code_resource.end = (unsigned long) &_etext - 1; | |
447 | data_resource.start = (unsigned long) &_etext; | |
448 | data_resource.end = (unsigned long) &_edata - 1; | |
449 | ||
9f4b0ba8 HC |
450 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
451 | if (!memory_chunk[i].size) | |
452 | continue; | |
c9e37353 HC |
453 | res = alloc_bootmem_low(sizeof(struct resource)); |
454 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; | |
455 | switch (memory_chunk[i].type) { | |
456 | case CHUNK_READ_WRITE: | |
457 | res->name = "System RAM"; | |
458 | break; | |
459 | case CHUNK_READ_ONLY: | |
460 | res->name = "System ROM"; | |
461 | res->flags |= IORESOURCE_READONLY; | |
462 | break; | |
463 | default: | |
464 | res->name = "reserved"; | |
465 | } | |
466 | res->start = memory_chunk[i].addr; | |
467 | res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; | |
468 | request_resource(&iomem_resource, res); | |
fe355b7f HY |
469 | |
470 | if (code_resource.start >= res->start && | |
471 | code_resource.start <= res->end && | |
472 | code_resource.end > res->end) { | |
473 | sub_res = alloc_bootmem_low(sizeof(struct resource)); | |
474 | memcpy(sub_res, &code_resource, | |
475 | sizeof(struct resource)); | |
476 | sub_res->end = res->end; | |
477 | code_resource.start = res->end + 1; | |
478 | request_resource(res, sub_res); | |
479 | } | |
480 | ||
481 | if (code_resource.start >= res->start && | |
482 | code_resource.start <= res->end && | |
483 | code_resource.end <= res->end) | |
484 | request_resource(res, &code_resource); | |
485 | ||
486 | if (data_resource.start >= res->start && | |
487 | data_resource.start <= res->end && | |
488 | data_resource.end > res->end) { | |
489 | sub_res = alloc_bootmem_low(sizeof(struct resource)); | |
490 | memcpy(sub_res, &data_resource, | |
491 | sizeof(struct resource)); | |
492 | sub_res->end = res->end; | |
493 | data_resource.start = res->end + 1; | |
494 | request_resource(res, sub_res); | |
495 | } | |
496 | ||
497 | if (data_resource.start >= res->start && | |
498 | data_resource.start <= res->end && | |
499 | data_resource.end <= res->end) | |
500 | request_resource(res, &data_resource); | |
c9e37353 HC |
501 | } |
502 | } | |
503 | ||
411ed322 MH |
504 | unsigned long real_memory_size; |
505 | EXPORT_SYMBOL_GPL(real_memory_size); | |
506 | ||
8b62bc96 HC |
507 | static void __init setup_memory_end(void) |
508 | { | |
411ed322 | 509 | unsigned long memory_size; |
5fd9c6e2 | 510 | unsigned long max_mem; |
8b62bc96 HC |
511 | int i; |
512 | ||
59f2e69d | 513 | #ifdef CONFIG_ZFCPDUMP |
23d75d9c | 514 | if (ipl_info.type == IPL_TYPE_FCP_DUMP) { |
411ed322 | 515 | memory_end = ZFCPDUMP_HSA_SIZE; |
23d75d9c HC |
516 | memory_end_set = 1; |
517 | } | |
411ed322 MH |
518 | #endif |
519 | memory_size = 0; | |
8b62bc96 HC |
520 | memory_end &= PAGE_MASK; |
521 | ||
0189103c | 522 | max_mem = memory_end ? min(VMEM_MAX_PHYS, memory_end) : VMEM_MAX_PHYS; |
5fd9c6e2 | 523 | memory_end = min(max_mem, memory_end); |
8b62bc96 | 524 | |
9f4b0ba8 HC |
525 | /* |
526 | * Make sure all chunks are MAX_ORDER aligned so we don't need the | |
527 | * extra checks that HOLES_IN_ZONE would require. | |
528 | */ | |
529 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
530 | unsigned long start, end; | |
531 | struct mem_chunk *chunk; | |
532 | unsigned long align; | |
533 | ||
534 | chunk = &memory_chunk[i]; | |
535 | align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); | |
536 | start = (chunk->addr + align - 1) & ~(align - 1); | |
537 | end = (chunk->addr + chunk->size) & ~(align - 1); | |
538 | if (start >= end) | |
539 | memset(chunk, 0, sizeof(*chunk)); | |
540 | else { | |
541 | chunk->addr = start; | |
542 | chunk->size = end - start; | |
543 | } | |
544 | } | |
545 | ||
8b62bc96 HC |
546 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
547 | struct mem_chunk *chunk = &memory_chunk[i]; | |
548 | ||
411ed322 MH |
549 | real_memory_size = max(real_memory_size, |
550 | chunk->addr + chunk->size); | |
8b62bc96 HC |
551 | if (chunk->addr >= max_mem) { |
552 | memset(chunk, 0, sizeof(*chunk)); | |
553 | continue; | |
554 | } | |
555 | if (chunk->addr + chunk->size > max_mem) | |
556 | chunk->size = max_mem - chunk->addr; | |
557 | memory_size = max(memory_size, chunk->addr + chunk->size); | |
558 | } | |
559 | if (!memory_end) | |
560 | memory_end = memory_size; | |
8b62bc96 HC |
561 | } |
562 | ||
c9e37353 HC |
563 | static void __init |
564 | setup_memory(void) | |
565 | { | |
566 | unsigned long bootmap_size; | |
fe355b7f | 567 | unsigned long start_pfn, end_pfn; |
c9e37353 | 568 | int i; |
1da177e4 LT |
569 | |
570 | /* | |
571 | * partially used pages are not usable - thus | |
572 | * we are rounding upwards: | |
573 | */ | |
65912a84 HC |
574 | start_pfn = PFN_UP(__pa(&_end)); |
575 | end_pfn = max_pfn = PFN_DOWN(memory_end); | |
1da177e4 | 576 | |
65912a84 HC |
577 | #ifdef CONFIG_BLK_DEV_INITRD |
578 | /* | |
579 | * Move the initrd in case the bitmap of the bootmem allocater | |
580 | * would overwrite it. | |
581 | */ | |
582 | ||
583 | if (INITRD_START && INITRD_SIZE) { | |
584 | unsigned long bmap_size; | |
585 | unsigned long start; | |
586 | ||
587 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); | |
588 | bmap_size = PFN_PHYS(bmap_size); | |
589 | ||
590 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { | |
591 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; | |
592 | ||
593 | if (start + INITRD_SIZE > memory_end) { | |
3b6ed4ab MS |
594 | pr_err("initrd extends beyond end of " |
595 | "memory (0x%08lx > 0x%08lx) " | |
65912a84 HC |
596 | "disabling initrd\n", |
597 | start + INITRD_SIZE, memory_end); | |
598 | INITRD_START = INITRD_SIZE = 0; | |
599 | } else { | |
3b6ed4ab MS |
600 | pr_info("Moving initrd (0x%08lx -> " |
601 | "0x%08lx, size: %ld)\n", | |
602 | INITRD_START, start, INITRD_SIZE); | |
65912a84 HC |
603 | memmove((void *) start, (void *) INITRD_START, |
604 | INITRD_SIZE); | |
605 | INITRD_START = start; | |
606 | } | |
607 | } | |
608 | } | |
609 | #endif | |
610 | ||
1da177e4 | 611 | /* |
7676bef9 | 612 | * Initialize the boot-time allocator |
1da177e4 LT |
613 | */ |
614 | bootmap_size = init_bootmem(start_pfn, end_pfn); | |
615 | ||
616 | /* | |
617 | * Register RAM areas with the bootmem allocator. | |
618 | */ | |
c9e37353 | 619 | |
0b642ede | 620 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
39b742f9 | 621 | unsigned long start_chunk, end_chunk, pfn; |
1da177e4 LT |
622 | |
623 | if (memory_chunk[i].type != CHUNK_READ_WRITE) | |
624 | continue; | |
39b742f9 | 625 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
fb2e7c5e | 626 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |
39b742f9 HC |
627 | end_chunk = min(end_chunk, end_pfn); |
628 | if (start_chunk >= end_chunk) | |
629 | continue; | |
630 | add_active_range(0, start_chunk, end_chunk); | |
631 | pfn = max(start_chunk, start_pfn); | |
fb2e7c5e | 632 | for (; pfn < end_chunk; pfn++) |
e2b8d7af MS |
633 | page_set_storage_key(PFN_PHYS(pfn), |
634 | PAGE_DEFAULT_KEY, 0); | |
1da177e4 LT |
635 | } |
636 | ||
0b642ede PO |
637 | psw_set_key(PAGE_DEFAULT_KEY); |
638 | ||
39b742f9 | 639 | free_bootmem_with_active_regions(0, max_pfn); |
c9e37353 | 640 | |
615b04b3 HC |
641 | /* |
642 | * Reserve memory used for lowcore/command line/kernel image. | |
643 | */ | |
72a7fe39 | 644 | reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
615b04b3 | 645 | reserve_bootmem((unsigned long)_stext, |
72a7fe39 BW |
646 | PFN_PHYS(start_pfn) - (unsigned long)_stext, |
647 | BOOTMEM_DEFAULT); | |
c9e37353 HC |
648 | /* |
649 | * Reserve the bootmem bitmap itself as well. We do this in two | |
650 | * steps (first step was init_bootmem()) because this catches | |
651 | * the (very unlikely) case of us accidentally initializing the | |
652 | * bootmem allocator with an invalid RAM area. | |
653 | */ | |
72a7fe39 BW |
654 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, |
655 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
656 | |
657 | #ifdef CONFIG_BLK_DEV_INITRD | |
65912a84 | 658 | if (INITRD_START && INITRD_SIZE) { |
1da177e4 | 659 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
72a7fe39 BW |
660 | reserve_bootmem(INITRD_START, INITRD_SIZE, |
661 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
662 | initrd_start = INITRD_START; |
663 | initrd_end = initrd_start + INITRD_SIZE; | |
664 | } else { | |
3b6ed4ab MS |
665 | pr_err("initrd extends beyond end of " |
666 | "memory (0x%08lx > 0x%08lx) " | |
667 | "disabling initrd\n", | |
c9e37353 HC |
668 | initrd_start + INITRD_SIZE, memory_end); |
669 | initrd_start = initrd_end = 0; | |
1da177e4 | 670 | } |
c9e37353 | 671 | } |
1da177e4 | 672 | #endif |
c9e37353 | 673 | } |
1da177e4 | 674 | |
cf8ba7a9 MS |
675 | /* |
676 | * Setup hardware capabilities. | |
677 | */ | |
678 | static void __init setup_hwcaps(void) | |
679 | { | |
680 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; | |
94038a99 | 681 | struct cpuid cpu_id; |
cf8ba7a9 MS |
682 | int i; |
683 | ||
cf8ba7a9 MS |
684 | /* |
685 | * The store facility list bits numbers as found in the principles | |
686 | * of operation are numbered with bit 1UL<<31 as number 0 to | |
687 | * bit 1UL<<0 as number 31. | |
688 | * Bit 0: instructions named N3, "backported" to esa-mode | |
689 | * Bit 2: z/Architecture mode is active | |
690 | * Bit 7: the store-facility-list-extended facility is installed | |
691 | * Bit 17: the message-security assist is installed | |
692 | * Bit 19: the long-displacement facility is installed | |
693 | * Bit 21: the extended-immediate facility is installed | |
488253ce AK |
694 | * Bit 22: extended-translation facility 3 is installed |
695 | * Bit 30: extended-translation facility 3 enhancement facility | |
cf8ba7a9 MS |
696 | * These get translated to: |
697 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, | |
698 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, | |
488253ce AK |
699 | * HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and |
700 | * HWCAP_S390_ETF3EH bit 8 (22 && 30). | |
cf8ba7a9 MS |
701 | */ |
702 | for (i = 0; i < 6; i++) | |
14375bc4 | 703 | if (test_facility(stfl_bits[i])) |
cf8ba7a9 MS |
704 | elf_hwcap |= 1UL << i; |
705 | ||
14375bc4 | 706 | if (test_facility(22) && test_facility(30)) |
ea2a4d3a | 707 | elf_hwcap |= HWCAP_S390_ETF3EH; |
488253ce | 708 | |
cf8ba7a9 MS |
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: | |
2ac3307f CE |
717 | * Bit 42: decimal floating point facility is installed |
718 | * Bit 44: perform floating point operation facility is installed | |
cf8ba7a9 | 719 | * translated to: |
488253ce | 720 | * HWCAP_S390_DFP bit 6 (42 && 44). |
cf8ba7a9 | 721 | */ |
14375bc4 MS |
722 | if ((elf_hwcap & (1UL << 2)) && test_facility(42) && test_facility(44)) |
723 | elf_hwcap |= HWCAP_S390_DFP; | |
cf8ba7a9 | 724 | |
ea2a4d3a HC |
725 | /* |
726 | * Huge page support HWCAP_S390_HPAGE is bit 7. | |
727 | */ | |
53492b1d | 728 | if (MACHINE_HAS_HPAGE) |
ea2a4d3a HC |
729 | elf_hwcap |= HWCAP_S390_HPAGE; |
730 | ||
731 | /* | |
732 | * 64-bit register support for 31-bit processes | |
733 | * HWCAP_S390_HIGH_GPRS is bit 9. | |
734 | */ | |
735 | elf_hwcap |= HWCAP_S390_HIGH_GPRS; | |
53492b1d | 736 | |
94038a99 MS |
737 | get_cpu_id(&cpu_id); |
738 | switch (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; | |
c84b9051 HC |
764 | case 0x2817: |
765 | strcpy(elf_platform, "z196"); | |
766 | break; | |
cf8ba7a9 MS |
767 | } |
768 | } | |
769 | ||
c9e37353 HC |
770 | /* |
771 | * Setup function called from init/main.c just after the banner | |
772 | * was printed. | |
773 | */ | |
1da177e4 | 774 | |
c9e37353 HC |
775 | void __init |
776 | setup_arch(char **cmdline_p) | |
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"); | |
27d71602 | 785 | else if (MACHINE_IS_LPAR) |
3b6ed4ab MS |
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"); | |
637952ca | 797 | else if (MACHINE_IS_KVM) |
3b6ed4ab | 798 | pr_info("Linux is running under KVM in 64-bit mode\n"); |
27d71602 | 799 | else if (MACHINE_IS_LPAR) |
3b6ed4ab | 800 | pr_info("Linux is running natively in 64-bit mode\n"); |
347a8dc3 | 801 | #endif /* CONFIG_64BIT */ |
c9e37353 | 802 | |
a0443fbb HB |
803 | /* Have one command line that is parsed and saved in /proc/cmdline */ |
804 | /* boot_command_line has been already set up in early.c */ | |
805 | *cmdline_p = boot_command_line; | |
59685296 | 806 | |
c9e37353 | 807 | ROOT_DEV = Root_RAM0; |
59685296 HC |
808 | |
809 | init_mm.start_code = PAGE_OFFSET; | |
810 | init_mm.end_code = (unsigned long) &_etext; | |
811 | init_mm.end_data = (unsigned long) &_edata; | |
812 | init_mm.brk = (unsigned long) &_end; | |
813 | ||
6c2a9e6d GS |
814 | if (MACHINE_HAS_MVCOS) |
815 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); | |
816 | else | |
817 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); | |
818 | ||
59685296 HC |
819 | parse_early_param(); |
820 | ||
99ca4e58 | 821 | setup_ipl(); |
8b62bc96 | 822 | setup_memory_end(); |
c1821c2e | 823 | setup_addressing_mode(); |
c9e37353 HC |
824 | setup_memory(); |
825 | setup_resources(); | |
826 | setup_lowcore(); | |
827 | ||
1da177e4 | 828 | cpu_init(); |
dbd70fb4 | 829 | s390_init_cpu_topology(); |
1da177e4 | 830 | |
cf8ba7a9 MS |
831 | /* |
832 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). | |
833 | */ | |
834 | setup_hwcaps(); | |
835 | ||
1da177e4 LT |
836 | /* |
837 | * Create kernel page tables and switch to virtual addressing. | |
838 | */ | |
839 | paging_init(); | |
840 | ||
841 | /* Setup default console */ | |
842 | conmode_default(); | |
637952ca | 843 | set_preferred_console(); |
411ed322 MH |
844 | |
845 | /* Setup zfcpdump support */ | |
846 | setup_zfcpdump(console_devno); | |
1da177e4 | 847 | } |