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1/*
2 * linux/arch/sparc/kernel/setup.c
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
6 */
7
8#include <linux/errno.h>
9#include <linux/sched.h>
10#include <linux/kernel.h>
11#include <linux/mm.h>
12#include <linux/stddef.h>
13#include <linux/unistd.h>
14#include <linux/ptrace.h>
15#include <linux/slab.h>
16#include <linux/initrd.h>
17#include <asm/smp.h>
18#include <linux/user.h>
19#include <linux/screen_info.h>
20#include <linux/delay.h>
21#include <linux/fs.h>
22#include <linux/seq_file.h>
23#include <linux/syscalls.h>
24#include <linux/kdev_t.h>
25#include <linux/major.h>
26#include <linux/string.h>
27#include <linux/init.h>
28#include <linux/interrupt.h>
29#include <linux/console.h>
30#include <linux/spinlock.h>
31#include <linux/root_dev.h>
32#include <linux/cpu.h>
33#include <linux/kdebug.h>
34#include <linux/export.h>
35#include <linux/start_kernel.h>
36
37#include <asm/io.h>
38#include <asm/processor.h>
39#include <asm/oplib.h>
40#include <asm/page.h>
41#include <asm/pgtable.h>
42#include <asm/traps.h>
43#include <asm/vaddrs.h>
44#include <asm/mbus.h>
45#include <asm/idprom.h>
46#include <asm/cpudata.h>
47#include <asm/setup.h>
48#include <asm/cacheflush.h>
49#include <asm/sections.h>
50
51#include "kernel.h"
52
53struct screen_info screen_info = {
54 0, 0, /* orig-x, orig-y */
55 0, /* unused */
56 0, /* orig-video-page */
57 0, /* orig-video-mode */
58 128, /* orig-video-cols */
59 0,0,0, /* ega_ax, ega_bx, ega_cx */
60 54, /* orig-video-lines */
61 0, /* orig-video-isVGA */
62 16 /* orig-video-points */
63};
64
65/* Typing sync at the prom prompt calls the function pointed to by
66 * romvec->pv_synchook which I set to the following function.
67 * This should sync all filesystems and return, for now it just
68 * prints out pretty messages and returns.
69 */
70
71extern unsigned long trapbase;
72
73/* Pretty sick eh? */
74static void prom_sync_me(void)
75{
76 unsigned long prom_tbr, flags;
77
78 /* XXX Badly broken. FIX! - Anton */
79 local_irq_save(flags);
80 __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
81 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
82 "nop\n\t"
83 "nop\n\t"
84 "nop\n\t" : : "r" (&trapbase));
85
86 prom_printf("PROM SYNC COMMAND...\n");
87 show_free_areas(0);
88 if (!is_idle_task(current)) {
89 local_irq_enable();
90 sys_sync();
91 local_irq_disable();
92 }
93 prom_printf("Returning to prom\n");
94
95 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
96 "nop\n\t"
97 "nop\n\t"
98 "nop\n\t" : : "r" (prom_tbr));
99 local_irq_restore(flags);
100}
101
102static unsigned int boot_flags __initdata = 0;
103#define BOOTME_DEBUG 0x1
104
105/* Exported for mm/init.c:paging_init. */
106unsigned long cmdline_memory_size __initdata = 0;
107
108/* which CPU booted us (0xff = not set) */
109unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
110
111static void
112prom_console_write(struct console *con, const char *s, unsigned n)
113{
114 prom_write(s, n);
115}
116
117static struct console prom_early_console = {
118 .name = "earlyprom",
119 .write = prom_console_write,
120 .flags = CON_PRINTBUFFER | CON_BOOT,
121 .index = -1,
122};
123
124/*
125 * Process kernel command line switches that are specific to the
126 * SPARC or that require special low-level processing.
127 */
128static void __init process_switch(char c)
129{
130 switch (c) {
131 case 'd':
132 boot_flags |= BOOTME_DEBUG;
133 break;
134 case 's':
135 break;
136 case 'h':
137 prom_printf("boot_flags_init: Halt!\n");
138 prom_halt();
139 break;
140 case 'p':
141 prom_early_console.flags &= ~CON_BOOT;
142 break;
143 default:
144 printk("Unknown boot switch (-%c)\n", c);
145 break;
146 }
147}
148
149static void __init boot_flags_init(char *commands)
150{
151 while (*commands) {
152 /* Move to the start of the next "argument". */
153 while (*commands && *commands == ' ')
154 commands++;
155
156 /* Process any command switches, otherwise skip it. */
157 if (*commands == '\0')
158 break;
159 if (*commands == '-') {
160 commands++;
161 while (*commands && *commands != ' ')
162 process_switch(*commands++);
163 continue;
164 }
165 if (!strncmp(commands, "mem=", 4)) {
166 /*
167 * "mem=XXX[kKmM] overrides the PROM-reported
168 * memory size.
169 */
170 cmdline_memory_size = simple_strtoul(commands + 4,
171 &commands, 0);
172 if (*commands == 'K' || *commands == 'k') {
173 cmdline_memory_size <<= 10;
174 commands++;
175 } else if (*commands=='M' || *commands=='m') {
176 cmdline_memory_size <<= 20;
177 commands++;
178 }
179 }
180 while (*commands && *commands != ' ')
181 commands++;
182 }
183}
184
185extern unsigned short root_flags;
186extern unsigned short root_dev;
187extern unsigned short ram_flags;
188#define RAMDISK_IMAGE_START_MASK 0x07FF
189#define RAMDISK_PROMPT_FLAG 0x8000
190#define RAMDISK_LOAD_FLAG 0x4000
191
192extern int root_mountflags;
193
194char reboot_command[COMMAND_LINE_SIZE];
195
196struct cpuid_patch_entry {
197 unsigned int addr;
198 unsigned int sun4d[3];
199 unsigned int leon[3];
200};
201extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
202
203static void __init per_cpu_patch(void)
204{
205 struct cpuid_patch_entry *p;
206
207 if (sparc_cpu_model == sun4m) {
208 /* Nothing to do, this is what the unpatched code
209 * targets.
210 */
211 return;
212 }
213
214 p = &__cpuid_patch;
215 while (p < &__cpuid_patch_end) {
216 unsigned long addr = p->addr;
217 unsigned int *insns;
218
219 switch (sparc_cpu_model) {
220 case sun4d:
221 insns = &p->sun4d[0];
222 break;
223
224 case sparc_leon:
225 insns = &p->leon[0];
226 break;
227 default:
228 prom_printf("Unknown cpu type, halting.\n");
229 prom_halt();
230 }
231 *(unsigned int *) (addr + 0) = insns[0];
232 flushi(addr + 0);
233 *(unsigned int *) (addr + 4) = insns[1];
234 flushi(addr + 4);
235 *(unsigned int *) (addr + 8) = insns[2];
236 flushi(addr + 8);
237
238 p++;
239 }
240}
241
242struct leon_1insn_patch_entry {
243 unsigned int addr;
244 unsigned int insn;
245};
246
247enum sparc_cpu sparc_cpu_model;
248EXPORT_SYMBOL(sparc_cpu_model);
249
250static __init void leon_patch(void)
251{
252 struct leon_1insn_patch_entry *start = (void *)__leon_1insn_patch;
253 struct leon_1insn_patch_entry *end = (void *)__leon_1insn_patch_end;
254
255 /* Default instruction is leon - no patching */
256 if (sparc_cpu_model == sparc_leon)
257 return;
258
259 while (start < end) {
260 unsigned long addr = start->addr;
261
262 *(unsigned int *)(addr) = start->insn;
263 flushi(addr);
264
265 start++;
266 }
267}
268
269struct tt_entry *sparc_ttable;
270struct pt_regs fake_swapper_regs;
271
272/* Called from head_32.S - before we have setup anything
273 * in the kernel. Be very careful with what you do here.
274 */
275void __init sparc32_start_kernel(struct linux_romvec *rp)
276{
277 prom_init(rp);
278
279 /* Set sparc_cpu_model */
280 sparc_cpu_model = sun_unknown;
281 if (!strcmp(&cputypval[0], "sun4m"))
282 sparc_cpu_model = sun4m;
283 if (!strcmp(&cputypval[0], "sun4s"))
284 sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
285 if (!strcmp(&cputypval[0], "sun4d"))
286 sparc_cpu_model = sun4d;
287 if (!strcmp(&cputypval[0], "sun4e"))
288 sparc_cpu_model = sun4e;
289 if (!strcmp(&cputypval[0], "sun4u"))
290 sparc_cpu_model = sun4u;
291 if (!strncmp(&cputypval[0], "leon" , 4))
292 sparc_cpu_model = sparc_leon;
293
294 leon_patch();
295 start_kernel();
296}
297
298void __init setup_arch(char **cmdline_p)
299{
300 int i;
301 unsigned long highest_paddr;
302
303 sparc_ttable = (struct tt_entry *) &trapbase;
304
305 /* Initialize PROM console and command line. */
306 *cmdline_p = prom_getbootargs();
307 strcpy(boot_command_line, *cmdline_p);
308 parse_early_param();
309
310 boot_flags_init(*cmdline_p);
311
312 register_console(&prom_early_console);
313
314 printk("ARCH: ");
315 switch(sparc_cpu_model) {
316 case sun4m:
317 printk("SUN4M\n");
318 break;
319 case sun4d:
320 printk("SUN4D\n");
321 break;
322 case sun4e:
323 printk("SUN4E\n");
324 break;
325 case sun4u:
326 printk("SUN4U\n");
327 break;
328 case sparc_leon:
329 printk("LEON\n");
330 break;
331 default:
332 printk("UNKNOWN!\n");
333 break;
334 }
335
336#ifdef CONFIG_DUMMY_CONSOLE
337 conswitchp = &dummy_con;
338#endif
339
340 idprom_init();
341 load_mmu();
342
343 phys_base = 0xffffffffUL;
344 highest_paddr = 0UL;
345 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
346 unsigned long top;
347
348 if (sp_banks[i].base_addr < phys_base)
349 phys_base = sp_banks[i].base_addr;
350 top = sp_banks[i].base_addr +
351 sp_banks[i].num_bytes;
352 if (highest_paddr < top)
353 highest_paddr = top;
354 }
355 pfn_base = phys_base >> PAGE_SHIFT;
356
357 if (!root_flags)
358 root_mountflags &= ~MS_RDONLY;
359 ROOT_DEV = old_decode_dev(root_dev);
360#ifdef CONFIG_BLK_DEV_RAM
361 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
362 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
363 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
364#endif
365
366 prom_setsync(prom_sync_me);
367
368 if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
369 ((*(short *)linux_dbvec) != -1)) {
370 printk("Booted under KADB. Syncing trap table.\n");
371 (*(linux_dbvec->teach_debugger))();
372 }
373
374 init_mm.context = (unsigned long) NO_CONTEXT;
375 init_task.thread.kregs = &fake_swapper_regs;
376
377 /* Run-time patch instructions to match the cpu model */
378 per_cpu_patch();
379
380 paging_init();
381
382 smp_setup_cpu_possible_map();
383}
384
385extern int stop_a_enabled;
386
387void sun_do_break(void)
388{
389 if (!stop_a_enabled)
390 return;
391
392 printk("\n");
393 flush_user_windows();
394
395 prom_cmdline();
396}
397EXPORT_SYMBOL(sun_do_break);
398
399int stop_a_enabled = 1;
400
401static int __init topology_init(void)
402{
403 int i, ncpus, err;
404
405 /* Count the number of physically present processors in
406 * the machine, even on uniprocessor, so that /proc/cpuinfo
407 * output is consistent with 2.4.x
408 */
409 ncpus = 0;
410 while (!cpu_find_by_instance(ncpus, NULL, NULL))
411 ncpus++;
412 ncpus_probed = ncpus;
413
414 err = 0;
415 for_each_online_cpu(i) {
416 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
417 if (!p)
418 err = -ENOMEM;
419 else
420 register_cpu(p, i);
421 }
422
423 return err;
424}
425
426subsys_initcall(topology_init);
1/*
2 * linux/arch/sparc/kernel/setup.c
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
6 */
7
8#include <linux/errno.h>
9#include <linux/sched.h>
10#include <linux/kernel.h>
11#include <linux/mm.h>
12#include <linux/stddef.h>
13#include <linux/unistd.h>
14#include <linux/ptrace.h>
15#include <linux/slab.h>
16#include <linux/initrd.h>
17#include <asm/smp.h>
18#include <linux/user.h>
19#include <linux/screen_info.h>
20#include <linux/delay.h>
21#include <linux/fs.h>
22#include <linux/seq_file.h>
23#include <linux/syscalls.h>
24#include <linux/kdev_t.h>
25#include <linux/major.h>
26#include <linux/string.h>
27#include <linux/init.h>
28#include <linux/interrupt.h>
29#include <linux/console.h>
30#include <linux/spinlock.h>
31#include <linux/root_dev.h>
32#include <linux/cpu.h>
33#include <linux/kdebug.h>
34#include <linux/export.h>
35#include <linux/start_kernel.h>
36
37#include <asm/io.h>
38#include <asm/processor.h>
39#include <asm/oplib.h>
40#include <asm/page.h>
41#include <asm/pgtable.h>
42#include <asm/traps.h>
43#include <asm/vaddrs.h>
44#include <asm/mbus.h>
45#include <asm/idprom.h>
46#include <asm/cpudata.h>
47#include <asm/setup.h>
48#include <asm/cacheflush.h>
49#include <asm/sections.h>
50
51#include "kernel.h"
52
53struct screen_info screen_info = {
54 0, 0, /* orig-x, orig-y */
55 0, /* unused */
56 0, /* orig-video-page */
57 0, /* orig-video-mode */
58 128, /* orig-video-cols */
59 0,0,0, /* ega_ax, ega_bx, ega_cx */
60 54, /* orig-video-lines */
61 0, /* orig-video-isVGA */
62 16 /* orig-video-points */
63};
64
65/* Typing sync at the prom prompt calls the function pointed to by
66 * romvec->pv_synchook which I set to the following function.
67 * This should sync all filesystems and return, for now it just
68 * prints out pretty messages and returns.
69 */
70
71/* Pretty sick eh? */
72static void prom_sync_me(void)
73{
74 unsigned long prom_tbr, flags;
75
76 /* XXX Badly broken. FIX! - Anton */
77 local_irq_save(flags);
78 __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
79 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
80 "nop\n\t"
81 "nop\n\t"
82 "nop\n\t" : : "r" (&trapbase));
83
84 prom_printf("PROM SYNC COMMAND...\n");
85 show_free_areas(0);
86 if (!is_idle_task(current)) {
87 local_irq_enable();
88 sys_sync();
89 local_irq_disable();
90 }
91 prom_printf("Returning to prom\n");
92
93 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
94 "nop\n\t"
95 "nop\n\t"
96 "nop\n\t" : : "r" (prom_tbr));
97 local_irq_restore(flags);
98}
99
100static unsigned int boot_flags __initdata = 0;
101#define BOOTME_DEBUG 0x1
102
103/* Exported for mm/init.c:paging_init. */
104unsigned long cmdline_memory_size __initdata = 0;
105
106/* which CPU booted us (0xff = not set) */
107unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
108
109static void
110prom_console_write(struct console *con, const char *s, unsigned int n)
111{
112 prom_write(s, n);
113}
114
115static struct console prom_early_console = {
116 .name = "earlyprom",
117 .write = prom_console_write,
118 .flags = CON_PRINTBUFFER | CON_BOOT,
119 .index = -1,
120};
121
122/*
123 * Process kernel command line switches that are specific to the
124 * SPARC or that require special low-level processing.
125 */
126static void __init process_switch(char c)
127{
128 switch (c) {
129 case 'd':
130 boot_flags |= BOOTME_DEBUG;
131 break;
132 case 's':
133 break;
134 case 'h':
135 prom_printf("boot_flags_init: Halt!\n");
136 prom_halt();
137 break;
138 case 'p':
139 prom_early_console.flags &= ~CON_BOOT;
140 break;
141 default:
142 printk("Unknown boot switch (-%c)\n", c);
143 break;
144 }
145}
146
147static void __init boot_flags_init(char *commands)
148{
149 while (*commands) {
150 /* Move to the start of the next "argument". */
151 while (*commands && *commands == ' ')
152 commands++;
153
154 /* Process any command switches, otherwise skip it. */
155 if (*commands == '\0')
156 break;
157 if (*commands == '-') {
158 commands++;
159 while (*commands && *commands != ' ')
160 process_switch(*commands++);
161 continue;
162 }
163 if (!strncmp(commands, "mem=", 4)) {
164 /*
165 * "mem=XXX[kKmM] overrides the PROM-reported
166 * memory size.
167 */
168 cmdline_memory_size = simple_strtoul(commands + 4,
169 &commands, 0);
170 if (*commands == 'K' || *commands == 'k') {
171 cmdline_memory_size <<= 10;
172 commands++;
173 } else if (*commands=='M' || *commands=='m') {
174 cmdline_memory_size <<= 20;
175 commands++;
176 }
177 }
178 while (*commands && *commands != ' ')
179 commands++;
180 }
181}
182
183extern unsigned short root_flags;
184extern unsigned short root_dev;
185extern unsigned short ram_flags;
186#define RAMDISK_IMAGE_START_MASK 0x07FF
187#define RAMDISK_PROMPT_FLAG 0x8000
188#define RAMDISK_LOAD_FLAG 0x4000
189
190extern int root_mountflags;
191
192char reboot_command[COMMAND_LINE_SIZE];
193
194struct cpuid_patch_entry {
195 unsigned int addr;
196 unsigned int sun4d[3];
197 unsigned int leon[3];
198};
199extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
200
201static void __init per_cpu_patch(void)
202{
203 struct cpuid_patch_entry *p;
204
205 if (sparc_cpu_model == sun4m) {
206 /* Nothing to do, this is what the unpatched code
207 * targets.
208 */
209 return;
210 }
211
212 p = &__cpuid_patch;
213 while (p < &__cpuid_patch_end) {
214 unsigned long addr = p->addr;
215 unsigned int *insns;
216
217 switch (sparc_cpu_model) {
218 case sun4d:
219 insns = &p->sun4d[0];
220 break;
221
222 case sparc_leon:
223 insns = &p->leon[0];
224 break;
225 default:
226 prom_printf("Unknown cpu type, halting.\n");
227 prom_halt();
228 }
229 *(unsigned int *) (addr + 0) = insns[0];
230 flushi(addr + 0);
231 *(unsigned int *) (addr + 4) = insns[1];
232 flushi(addr + 4);
233 *(unsigned int *) (addr + 8) = insns[2];
234 flushi(addr + 8);
235
236 p++;
237 }
238}
239
240struct leon_1insn_patch_entry {
241 unsigned int addr;
242 unsigned int insn;
243};
244
245enum sparc_cpu sparc_cpu_model;
246EXPORT_SYMBOL(sparc_cpu_model);
247
248static __init void leon_patch(void)
249{
250 struct leon_1insn_patch_entry *start = (void *)__leon_1insn_patch;
251 struct leon_1insn_patch_entry *end = (void *)__leon_1insn_patch_end;
252
253 /* Default instruction is leon - no patching */
254 if (sparc_cpu_model == sparc_leon)
255 return;
256
257 while (start < end) {
258 unsigned long addr = start->addr;
259
260 *(unsigned int *)(addr) = start->insn;
261 flushi(addr);
262
263 start++;
264 }
265}
266
267struct tt_entry *sparc_ttable;
268static struct pt_regs fake_swapper_regs;
269
270/* Called from head_32.S - before we have setup anything
271 * in the kernel. Be very careful with what you do here.
272 */
273void __init sparc32_start_kernel(struct linux_romvec *rp)
274{
275 prom_init(rp);
276
277 /* Set sparc_cpu_model */
278 sparc_cpu_model = sun_unknown;
279 if (!strcmp(&cputypval[0], "sun4m"))
280 sparc_cpu_model = sun4m;
281 if (!strcmp(&cputypval[0], "sun4s"))
282 sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
283 if (!strcmp(&cputypval[0], "sun4d"))
284 sparc_cpu_model = sun4d;
285 if (!strcmp(&cputypval[0], "sun4e"))
286 sparc_cpu_model = sun4e;
287 if (!strcmp(&cputypval[0], "sun4u"))
288 sparc_cpu_model = sun4u;
289 if (!strncmp(&cputypval[0], "leon" , 4))
290 sparc_cpu_model = sparc_leon;
291
292 leon_patch();
293 start_kernel();
294}
295
296void __init setup_arch(char **cmdline_p)
297{
298 int i;
299 unsigned long highest_paddr;
300
301 sparc_ttable = &trapbase;
302
303 /* Initialize PROM console and command line. */
304 *cmdline_p = prom_getbootargs();
305 strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
306 parse_early_param();
307
308 boot_flags_init(*cmdline_p);
309
310 register_console(&prom_early_console);
311
312 printk("ARCH: ");
313 switch(sparc_cpu_model) {
314 case sun4m:
315 printk("SUN4M\n");
316 break;
317 case sun4d:
318 printk("SUN4D\n");
319 break;
320 case sun4e:
321 printk("SUN4E\n");
322 break;
323 case sun4u:
324 printk("SUN4U\n");
325 break;
326 case sparc_leon:
327 printk("LEON\n");
328 break;
329 default:
330 printk("UNKNOWN!\n");
331 break;
332 }
333
334#ifdef CONFIG_DUMMY_CONSOLE
335 conswitchp = &dummy_con;
336#endif
337
338 idprom_init();
339 load_mmu();
340
341 phys_base = 0xffffffffUL;
342 highest_paddr = 0UL;
343 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
344 unsigned long top;
345
346 if (sp_banks[i].base_addr < phys_base)
347 phys_base = sp_banks[i].base_addr;
348 top = sp_banks[i].base_addr +
349 sp_banks[i].num_bytes;
350 if (highest_paddr < top)
351 highest_paddr = top;
352 }
353 pfn_base = phys_base >> PAGE_SHIFT;
354
355 if (!root_flags)
356 root_mountflags &= ~MS_RDONLY;
357 ROOT_DEV = old_decode_dev(root_dev);
358#ifdef CONFIG_BLK_DEV_RAM
359 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
360 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
361 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
362#endif
363
364 prom_setsync(prom_sync_me);
365
366 if((boot_flags & BOOTME_DEBUG) && (linux_dbvec != NULL) &&
367 ((*(short *)linux_dbvec) != -1)) {
368 printk("Booted under KADB. Syncing trap table.\n");
369 (*(linux_dbvec->teach_debugger))();
370 }
371
372 init_task.thread.kregs = &fake_swapper_regs;
373
374 /* Run-time patch instructions to match the cpu model */
375 per_cpu_patch();
376
377 paging_init();
378
379 smp_setup_cpu_possible_map();
380}
381
382extern int stop_a_enabled;
383
384void sun_do_break(void)
385{
386 if (!stop_a_enabled)
387 return;
388
389 printk("\n");
390 flush_user_windows();
391
392 prom_cmdline();
393}
394EXPORT_SYMBOL(sun_do_break);
395
396int stop_a_enabled = 1;
397
398static int __init topology_init(void)
399{
400 int i, ncpus, err;
401
402 /* Count the number of physically present processors in
403 * the machine, even on uniprocessor, so that /proc/cpuinfo
404 * output is consistent with 2.4.x
405 */
406 ncpus = 0;
407 while (!cpu_find_by_instance(ncpus, NULL, NULL))
408 ncpus++;
409 ncpus_probed = ncpus;
410
411 err = 0;
412 for_each_online_cpu(i) {
413 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
414 if (!p)
415 err = -ENOMEM;
416 else
417 register_cpu(p, i);
418 }
419
420 return err;
421}
422
423subsys_initcall(topology_init);