1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/arch/sparc64/kernel/setup.c
4 *
5 * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7 */
8
9 #include <linux/errno.h>
10 #include <linux/sched.h>
11 #include <linux/kernel.h>
12 #include <linux/mm.h>
13 #include <linux/stddef.h>
14 #include <linux/unistd.h>
15 #include <linux/ptrace.h>
16 #include <asm/smp.h>
17 #include <linux/user.h>
18 #include <linux/screen_info.h>
19 #include <linux/delay.h>
20 #include <linux/fs.h>
21 #include <linux/seq_file.h>
22 #include <linux/syscalls.h>
23 #include <linux/kdev_t.h>
24 #include <linux/major.h>
25 #include <linux/string.h>
26 #include <linux/init.h>
27 #include <linux/inet.h>
28 #include <linux/console.h>
29 #include <linux/root_dev.h>
30 #include <linux/interrupt.h>
31 #include <linux/cpu.h>
32 #include <linux/initrd.h>
33 #include <linux/module.h>
34 #include <linux/start_kernel.h>
35 #include <linux/memblock.h>
36 #include <uapi/linux/mount.h>
37
38 #include <asm/io.h>
39 #include <asm/processor.h>
40 #include <asm/oplib.h>
41 #include <asm/page.h>
42 #include <asm/idprom.h>
43 #include <asm/head.h>
44 #include <asm/starfire.h>
45 #include <asm/mmu_context.h>
46 #include <asm/timer.h>
47 #include <asm/sections.h>
48 #include <asm/setup.h>
49 #include <asm/mmu.h>
50 #include <asm/ns87303.h>
51 #include <asm/btext.h>
52 #include <asm/elf.h>
53 #include <asm/mdesc.h>
54 #include <asm/cacheflush.h>
55 #include <asm/dma.h>
56 #include <asm/irq.h>
57
58 #ifdef CONFIG_IP_PNP
59 #include <net/ipconfig.h>
60 #endif
61
62 #include "entry.h"
63 #include "kernel.h"
64
65 /* Used to synchronize accesses to NatSemi SUPER I/O chip configure
66 * operations in asm/ns87303.h
67 */
68 DEFINE_SPINLOCK(ns87303_lock);
69 EXPORT_SYMBOL(ns87303_lock);
70
71 struct screen_info screen_info = {
72 0, 0, /* orig-x, orig-y */
73 0, /* unused */
74 0, /* orig-video-page */
75 0, /* orig-video-mode */
76 128, /* orig-video-cols */
77 0, 0, 0, /* unused, ega_bx, unused */
78 54, /* orig-video-lines */
79 0, /* orig-video-isVGA */
80 16 /* orig-video-points */
81 };
82
83 static void
prom_console_write(struct console * con,const char * s,unsigned int n)84 prom_console_write(struct console *con, const char *s, unsigned int n)
85 {
86 prom_write(s, n);
87 }
88
89 /* Exported for mm/init.c:paging_init. */
90 unsigned long cmdline_memory_size = 0;
91
92 static struct console prom_early_console = {
93 .name = "earlyprom",
94 .write = prom_console_write,
95 .flags = CON_PRINTBUFFER | CON_BOOT | CON_ANYTIME,
96 .index = -1,
97 };
98
99 /*
100 * Process kernel command line switches that are specific to the
101 * SPARC or that require special low-level processing.
102 */
process_switch(char c)103 static void __init process_switch(char c)
104 {
105 switch (c) {
106 case 'd':
107 case 's':
108 break;
109 case 'h':
110 prom_printf("boot_flags_init: Halt!\n");
111 prom_halt();
112 break;
113 case 'p':
114 prom_early_console.flags &= ~CON_BOOT;
115 break;
116 case 'P':
117 /* Force UltraSPARC-III P-Cache on. */
118 if (tlb_type != cheetah) {
119 printk("BOOT: Ignoring P-Cache force option.\n");
120 break;
121 }
122 cheetah_pcache_forced_on = 1;
123 add_taint(TAINT_MACHINE_CHECK, LOCKDEP_NOW_UNRELIABLE);
124 cheetah_enable_pcache();
125 break;
126
127 default:
128 printk("Unknown boot switch (-%c)\n", c);
129 break;
130 }
131 }
132
boot_flags_init(char * commands)133 static void __init boot_flags_init(char *commands)
134 {
135 while (*commands) {
136 /* Move to the start of the next "argument". */
137 while (*commands == ' ')
138 commands++;
139
140 /* Process any command switches, otherwise skip it. */
141 if (*commands == '\0')
142 break;
143 if (*commands == '-') {
144 commands++;
145 while (*commands && *commands != ' ')
146 process_switch(*commands++);
147 continue;
148 }
149 if (!strncmp(commands, "mem=", 4))
150 cmdline_memory_size = memparse(commands + 4, &commands);
151
152 while (*commands && *commands != ' ')
153 commands++;
154 }
155 }
156
157 extern unsigned short root_flags;
158 extern unsigned short root_dev;
159 extern unsigned short ram_flags;
160 #define RAMDISK_IMAGE_START_MASK 0x07FF
161 #define RAMDISK_PROMPT_FLAG 0x8000
162 #define RAMDISK_LOAD_FLAG 0x4000
163
164 extern int root_mountflags;
165
166 char reboot_command[COMMAND_LINE_SIZE];
167
168 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
169
per_cpu_patch(void)170 static void __init per_cpu_patch(void)
171 {
172 struct cpuid_patch_entry *p;
173 unsigned long ver;
174 int is_jbus;
175
176 if (tlb_type == spitfire && !this_is_starfire)
177 return;
178
179 is_jbus = 0;
180 if (tlb_type != hypervisor) {
181 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
182 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
183 (ver >> 32UL) == __SERRANO_ID);
184 }
185
186 p = &__cpuid_patch;
187 while (p < &__cpuid_patch_end) {
188 unsigned long addr = p->addr;
189 unsigned int *insns;
190
191 switch (tlb_type) {
192 case spitfire:
193 insns = &p->starfire[0];
194 break;
195 case cheetah:
196 case cheetah_plus:
197 if (is_jbus)
198 insns = &p->cheetah_jbus[0];
199 else
200 insns = &p->cheetah_safari[0];
201 break;
202 case hypervisor:
203 insns = &p->sun4v[0];
204 break;
205 default:
206 prom_printf("Unknown cpu type, halting.\n");
207 prom_halt();
208 }
209
210 *(unsigned int *) (addr + 0) = insns[0];
211 wmb();
212 __asm__ __volatile__("flush %0" : : "r" (addr + 0));
213
214 *(unsigned int *) (addr + 4) = insns[1];
215 wmb();
216 __asm__ __volatile__("flush %0" : : "r" (addr + 4));
217
218 *(unsigned int *) (addr + 8) = insns[2];
219 wmb();
220 __asm__ __volatile__("flush %0" : : "r" (addr + 8));
221
222 *(unsigned int *) (addr + 12) = insns[3];
223 wmb();
224 __asm__ __volatile__("flush %0" : : "r" (addr + 12));
225
226 p++;
227 }
228 }
229
sun4v_patch_1insn_range(struct sun4v_1insn_patch_entry * start,struct sun4v_1insn_patch_entry * end)230 void sun4v_patch_1insn_range(struct sun4v_1insn_patch_entry *start,
231 struct sun4v_1insn_patch_entry *end)
232 {
233 while (start < end) {
234 unsigned long addr = start->addr;
235
236 *(unsigned int *) (addr + 0) = start->insn;
237 wmb();
238 __asm__ __volatile__("flush %0" : : "r" (addr + 0));
239
240 start++;
241 }
242 }
243
sun4v_patch_2insn_range(struct sun4v_2insn_patch_entry * start,struct sun4v_2insn_patch_entry * end)244 void sun4v_patch_2insn_range(struct sun4v_2insn_patch_entry *start,
245 struct sun4v_2insn_patch_entry *end)
246 {
247 while (start < end) {
248 unsigned long addr = start->addr;
249
250 *(unsigned int *) (addr + 0) = start->insns[0];
251 wmb();
252 __asm__ __volatile__("flush %0" : : "r" (addr + 0));
253
254 *(unsigned int *) (addr + 4) = start->insns[1];
255 wmb();
256 __asm__ __volatile__("flush %0" : : "r" (addr + 4));
257
258 start++;
259 }
260 }
261
sun_m7_patch_2insn_range(struct sun4v_2insn_patch_entry * start,struct sun4v_2insn_patch_entry * end)262 void sun_m7_patch_2insn_range(struct sun4v_2insn_patch_entry *start,
263 struct sun4v_2insn_patch_entry *end)
264 {
265 while (start < end) {
266 unsigned long addr = start->addr;
267
268 *(unsigned int *) (addr + 0) = start->insns[0];
269 wmb();
270 __asm__ __volatile__("flush %0" : : "r" (addr + 0));
271
272 *(unsigned int *) (addr + 4) = start->insns[1];
273 wmb();
274 __asm__ __volatile__("flush %0" : : "r" (addr + 4));
275
276 start++;
277 }
278 }
279
sun4v_patch(void)280 static void __init sun4v_patch(void)
281 {
282 extern void sun4v_hvapi_init(void);
283
284 if (tlb_type != hypervisor)
285 return;
286
287 sun4v_patch_1insn_range(&__sun4v_1insn_patch,
288 &__sun4v_1insn_patch_end);
289
290 sun4v_patch_2insn_range(&__sun4v_2insn_patch,
291 &__sun4v_2insn_patch_end);
292
293 switch (sun4v_chip_type) {
294 case SUN4V_CHIP_SPARC_M7:
295 case SUN4V_CHIP_SPARC_M8:
296 case SUN4V_CHIP_SPARC_SN:
297 sun4v_patch_1insn_range(&__sun_m7_1insn_patch,
298 &__sun_m7_1insn_patch_end);
299 sun_m7_patch_2insn_range(&__sun_m7_2insn_patch,
300 &__sun_m7_2insn_patch_end);
301 break;
302 default:
303 break;
304 }
305
306 if (sun4v_chip_type != SUN4V_CHIP_NIAGARA1) {
307 sun4v_patch_1insn_range(&__fast_win_ctrl_1insn_patch,
308 &__fast_win_ctrl_1insn_patch_end);
309 }
310
311 sun4v_hvapi_init();
312 }
313
popc_patch(void)314 static void __init popc_patch(void)
315 {
316 struct popc_3insn_patch_entry *p3;
317 struct popc_6insn_patch_entry *p6;
318
319 p3 = &__popc_3insn_patch;
320 while (p3 < &__popc_3insn_patch_end) {
321 unsigned long i, addr = p3->addr;
322
323 for (i = 0; i < 3; i++) {
324 *(unsigned int *) (addr + (i * 4)) = p3->insns[i];
325 wmb();
326 __asm__ __volatile__("flush %0"
327 : : "r" (addr + (i * 4)));
328 }
329
330 p3++;
331 }
332
333 p6 = &__popc_6insn_patch;
334 while (p6 < &__popc_6insn_patch_end) {
335 unsigned long i, addr = p6->addr;
336
337 for (i = 0; i < 6; i++) {
338 *(unsigned int *) (addr + (i * 4)) = p6->insns[i];
339 wmb();
340 __asm__ __volatile__("flush %0"
341 : : "r" (addr + (i * 4)));
342 }
343
344 p6++;
345 }
346 }
347
pause_patch(void)348 static void __init pause_patch(void)
349 {
350 struct pause_patch_entry *p;
351
352 p = &__pause_3insn_patch;
353 while (p < &__pause_3insn_patch_end) {
354 unsigned long i, addr = p->addr;
355
356 for (i = 0; i < 3; i++) {
357 *(unsigned int *) (addr + (i * 4)) = p->insns[i];
358 wmb();
359 __asm__ __volatile__("flush %0"
360 : : "r" (addr + (i * 4)));
361 }
362
363 p++;
364 }
365 }
366
start_early_boot(void)367 void __init start_early_boot(void)
368 {
369 int cpu;
370
371 check_if_starfire();
372 per_cpu_patch();
373 sun4v_patch();
374 smp_init_cpu_poke();
375
376 cpu = hard_smp_processor_id();
377 if (cpu >= NR_CPUS) {
378 prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
379 cpu, NR_CPUS);
380 prom_halt();
381 }
382 current_thread_info()->cpu = cpu;
383
384 time_init_early();
385 prom_init_report();
386 start_kernel();
387 }
388
389 /* On Ultra, we support all of the v8 capabilities. */
390 unsigned long sparc64_elf_hwcap = (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR |
391 HWCAP_SPARC_SWAP | HWCAP_SPARC_MULDIV |
392 HWCAP_SPARC_V9);
393 EXPORT_SYMBOL(sparc64_elf_hwcap);
394
395 static const char *hwcaps[] = {
396 "flush", "stbar", "swap", "muldiv", "v9",
397 "ultra3", "blkinit", "n2",
398
399 /* These strings are as they appear in the machine description
400 * 'hwcap-list' property for cpu nodes.
401 */
402 "mul32", "div32", "fsmuld", "v8plus", "popc", "vis", "vis2",
403 "ASIBlkInit", "fmaf", "vis3", "hpc", "random", "trans", "fjfmau",
404 "ima", "cspare", "pause", "cbcond", NULL /*reserved for crypto */,
405 "adp",
406 };
407
408 static const char *crypto_hwcaps[] = {
409 "aes", "des", "kasumi", "camellia", "md5", "sha1", "sha256",
410 "sha512", "mpmul", "montmul", "montsqr", "crc32c",
411 };
412
cpucap_info(struct seq_file * m)413 void cpucap_info(struct seq_file *m)
414 {
415 unsigned long caps = sparc64_elf_hwcap;
416 int i, printed = 0;
417
418 seq_puts(m, "cpucaps\t\t: ");
419 for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {
420 unsigned long bit = 1UL << i;
421 if (hwcaps[i] && (caps & bit)) {
422 seq_printf(m, "%s%s",
423 printed ? "," : "", hwcaps[i]);
424 printed++;
425 }
426 }
427 if (caps & HWCAP_SPARC_CRYPTO) {
428 unsigned long cfr;
429
430 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
431 for (i = 0; i < ARRAY_SIZE(crypto_hwcaps); i++) {
432 unsigned long bit = 1UL << i;
433 if (cfr & bit) {
434 seq_printf(m, "%s%s",
435 printed ? "," : "", crypto_hwcaps[i]);
436 printed++;
437 }
438 }
439 }
440 seq_putc(m, '\n');
441 }
442
report_one_hwcap(int * printed,const char * name)443 static void __init report_one_hwcap(int *printed, const char *name)
444 {
445 if ((*printed) == 0)
446 printk(KERN_INFO "CPU CAPS: [");
447 printk(KERN_CONT "%s%s",
448 (*printed) ? "," : "", name);
449 if (++(*printed) == 8) {
450 printk(KERN_CONT "]\n");
451 *printed = 0;
452 }
453 }
454
report_crypto_hwcaps(int * printed)455 static void __init report_crypto_hwcaps(int *printed)
456 {
457 unsigned long cfr;
458 int i;
459
460 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
461
462 for (i = 0; i < ARRAY_SIZE(crypto_hwcaps); i++) {
463 unsigned long bit = 1UL << i;
464 if (cfr & bit)
465 report_one_hwcap(printed, crypto_hwcaps[i]);
466 }
467 }
468
report_hwcaps(unsigned long caps)469 static void __init report_hwcaps(unsigned long caps)
470 {
471 int i, printed = 0;
472
473 for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {
474 unsigned long bit = 1UL << i;
475 if (hwcaps[i] && (caps & bit))
476 report_one_hwcap(&printed, hwcaps[i]);
477 }
478 if (caps & HWCAP_SPARC_CRYPTO)
479 report_crypto_hwcaps(&printed);
480 if (printed != 0)
481 printk(KERN_CONT "]\n");
482 }
483
mdesc_cpu_hwcap_list(void)484 static unsigned long __init mdesc_cpu_hwcap_list(void)
485 {
486 struct mdesc_handle *hp;
487 unsigned long caps = 0;
488 const char *prop;
489 int len;
490 u64 pn;
491
492 hp = mdesc_grab();
493 if (!hp)
494 return 0;
495
496 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "cpu");
497 if (pn == MDESC_NODE_NULL)
498 goto out;
499
500 prop = mdesc_get_property(hp, pn, "hwcap-list", &len);
501 if (!prop)
502 goto out;
503
504 while (len) {
505 int i, plen;
506
507 for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {
508 unsigned long bit = 1UL << i;
509
510 if (hwcaps[i] && !strcmp(prop, hwcaps[i])) {
511 caps |= bit;
512 break;
513 }
514 }
515 for (i = 0; i < ARRAY_SIZE(crypto_hwcaps); i++) {
516 if (!strcmp(prop, crypto_hwcaps[i]))
517 caps |= HWCAP_SPARC_CRYPTO;
518 }
519
520 plen = strlen(prop) + 1;
521 prop += plen;
522 len -= plen;
523 }
524
525 out:
526 mdesc_release(hp);
527 return caps;
528 }
529
530 /* This yields a mask that user programs can use to figure out what
531 * instruction set this cpu supports.
532 */
init_sparc64_elf_hwcap(void)533 static void __init init_sparc64_elf_hwcap(void)
534 {
535 unsigned long cap = sparc64_elf_hwcap;
536 unsigned long mdesc_caps;
537
538 if (tlb_type == cheetah || tlb_type == cheetah_plus)
539 cap |= HWCAP_SPARC_ULTRA3;
540 else if (tlb_type == hypervisor) {
541 if (sun4v_chip_type == SUN4V_CHIP_NIAGARA1 ||
542 sun4v_chip_type == SUN4V_CHIP_NIAGARA2 ||
543 sun4v_chip_type == SUN4V_CHIP_NIAGARA3 ||
544 sun4v_chip_type == SUN4V_CHIP_NIAGARA4 ||
545 sun4v_chip_type == SUN4V_CHIP_NIAGARA5 ||
546 sun4v_chip_type == SUN4V_CHIP_SPARC_M6 ||
547 sun4v_chip_type == SUN4V_CHIP_SPARC_M7 ||
548 sun4v_chip_type == SUN4V_CHIP_SPARC_M8 ||
549 sun4v_chip_type == SUN4V_CHIP_SPARC_SN ||
550 sun4v_chip_type == SUN4V_CHIP_SPARC64X)
551 cap |= HWCAP_SPARC_BLKINIT;
552 if (sun4v_chip_type == SUN4V_CHIP_NIAGARA2 ||
553 sun4v_chip_type == SUN4V_CHIP_NIAGARA3 ||
554 sun4v_chip_type == SUN4V_CHIP_NIAGARA4 ||
555 sun4v_chip_type == SUN4V_CHIP_NIAGARA5 ||
556 sun4v_chip_type == SUN4V_CHIP_SPARC_M6 ||
557 sun4v_chip_type == SUN4V_CHIP_SPARC_M7 ||
558 sun4v_chip_type == SUN4V_CHIP_SPARC_M8 ||
559 sun4v_chip_type == SUN4V_CHIP_SPARC_SN ||
560 sun4v_chip_type == SUN4V_CHIP_SPARC64X)
561 cap |= HWCAP_SPARC_N2;
562 }
563
564 cap |= (AV_SPARC_MUL32 | AV_SPARC_DIV32 | AV_SPARC_V8PLUS);
565
566 mdesc_caps = mdesc_cpu_hwcap_list();
567 if (!mdesc_caps) {
568 if (tlb_type == spitfire)
569 cap |= AV_SPARC_VIS;
570 if (tlb_type == cheetah || tlb_type == cheetah_plus)
571 cap |= AV_SPARC_VIS | AV_SPARC_VIS2;
572 if (tlb_type == cheetah_plus) {
573 unsigned long impl, ver;
574
575 __asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver));
576 impl = ((ver >> 32) & 0xffff);
577 if (impl == PANTHER_IMPL)
578 cap |= AV_SPARC_POPC;
579 }
580 if (tlb_type == hypervisor) {
581 if (sun4v_chip_type == SUN4V_CHIP_NIAGARA1)
582 cap |= AV_SPARC_ASI_BLK_INIT;
583 if (sun4v_chip_type == SUN4V_CHIP_NIAGARA2 ||
584 sun4v_chip_type == SUN4V_CHIP_NIAGARA3 ||
585 sun4v_chip_type == SUN4V_CHIP_NIAGARA4 ||
586 sun4v_chip_type == SUN4V_CHIP_NIAGARA5 ||
587 sun4v_chip_type == SUN4V_CHIP_SPARC_M6 ||
588 sun4v_chip_type == SUN4V_CHIP_SPARC_M7 ||
589 sun4v_chip_type == SUN4V_CHIP_SPARC_M8 ||
590 sun4v_chip_type == SUN4V_CHIP_SPARC_SN ||
591 sun4v_chip_type == SUN4V_CHIP_SPARC64X)
592 cap |= (AV_SPARC_VIS | AV_SPARC_VIS2 |
593 AV_SPARC_ASI_BLK_INIT |
594 AV_SPARC_POPC);
595 if (sun4v_chip_type == SUN4V_CHIP_NIAGARA3 ||
596 sun4v_chip_type == SUN4V_CHIP_NIAGARA4 ||
597 sun4v_chip_type == SUN4V_CHIP_NIAGARA5 ||
598 sun4v_chip_type == SUN4V_CHIP_SPARC_M6 ||
599 sun4v_chip_type == SUN4V_CHIP_SPARC_M7 ||
600 sun4v_chip_type == SUN4V_CHIP_SPARC_M8 ||
601 sun4v_chip_type == SUN4V_CHIP_SPARC_SN ||
602 sun4v_chip_type == SUN4V_CHIP_SPARC64X)
603 cap |= (AV_SPARC_VIS3 | AV_SPARC_HPC |
604 AV_SPARC_FMAF);
605 }
606 }
607 sparc64_elf_hwcap = cap | mdesc_caps;
608
609 report_hwcaps(sparc64_elf_hwcap);
610
611 if (sparc64_elf_hwcap & AV_SPARC_POPC)
612 popc_patch();
613 if (sparc64_elf_hwcap & AV_SPARC_PAUSE)
614 pause_patch();
615 }
616
alloc_irqstack_bootmem(void)617 void __init alloc_irqstack_bootmem(void)
618 {
619 unsigned int i, node;
620
621 for_each_possible_cpu(i) {
622 node = cpu_to_node(i);
623
624 softirq_stack[i] = memblock_alloc_node(THREAD_SIZE,
625 THREAD_SIZE, node);
626 if (!softirq_stack[i])
627 panic("%s: Failed to allocate %lu bytes align=%lx nid=%d\n",
628 __func__, THREAD_SIZE, THREAD_SIZE, node);
629 hardirq_stack[i] = memblock_alloc_node(THREAD_SIZE,
630 THREAD_SIZE, node);
631 if (!hardirq_stack[i])
632 panic("%s: Failed to allocate %lu bytes align=%lx nid=%d\n",
633 __func__, THREAD_SIZE, THREAD_SIZE, node);
634 }
635 }
636
setup_arch(char ** cmdline_p)637 void __init setup_arch(char **cmdline_p)
638 {
639 /* Initialize PROM console and command line. */
640 *cmdline_p = prom_getbootargs();
641 strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
642 parse_early_param();
643
644 boot_flags_init(*cmdline_p);
645 #ifdef CONFIG_EARLYFB
646 if (btext_find_display())
647 #endif
648 register_console(&prom_early_console);
649
650 if (tlb_type == hypervisor)
651 pr_info("ARCH: SUN4V\n");
652 else
653 pr_info("ARCH: SUN4U\n");
654
655 idprom_init();
656
657 if (!root_flags)
658 root_mountflags &= ~MS_RDONLY;
659 ROOT_DEV = old_decode_dev(root_dev);
660 #ifdef CONFIG_BLK_DEV_RAM
661 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
662 #endif
663
664 task_thread_info(&init_task)->kregs = &fake_swapper_regs;
665
666 #ifdef CONFIG_IP_PNP
667 if (!ic_set_manually) {
668 phandle chosen = prom_finddevice("/chosen");
669 u32 cl, sv, gw;
670
671 cl = prom_getintdefault (chosen, "client-ip", 0);
672 sv = prom_getintdefault (chosen, "server-ip", 0);
673 gw = prom_getintdefault (chosen, "gateway-ip", 0);
674 if (cl && sv) {
675 ic_myaddr = cl;
676 ic_servaddr = sv;
677 if (gw)
678 ic_gateway = gw;
679 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
680 ic_proto_enabled = 0;
681 #endif
682 }
683 }
684 #endif
685
686 /* Get boot processor trap_block[] setup. */
687 init_cur_cpu_trap(current_thread_info());
688
689 paging_init();
690 init_sparc64_elf_hwcap();
691 smp_fill_in_cpu_possible_map();
692 /*
693 * Once the OF device tree and MDESC have been setup and nr_cpus has
694 * been parsed, we know the list of possible cpus. Therefore we can
695 * allocate the IRQ stacks.
696 */
697 alloc_irqstack_bootmem();
698 }
699
700 extern int stop_a_enabled;
701
sun_do_break(void)702 void sun_do_break(void)
703 {
704 if (!stop_a_enabled)
705 return;
706
707 prom_printf("\n");
708 flush_user_windows();
709
710 prom_cmdline();
711 }
712 EXPORT_SYMBOL(sun_do_break);
713
714 int stop_a_enabled = 1;
715 EXPORT_SYMBOL(stop_a_enabled);
716
