]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - arch/sparc/kernel/setup_32.c
sparc: Create a new file lib/ksyms.c and add export of all symbols defined in assembl...
[mirror_ubuntu-bionic-kernel.git] / arch / sparc / kernel / setup_32.c
CommitLineData
88278ca2 1/*
1da177e4
LT
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>
894673ee 19#include <linux/screen_info.h>
1da177e4 20#include <linux/delay.h>
1da177e4
LT
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>
a8cbdcea 32#include <linux/cpu.h>
1eeb66a1 33#include <linux/kdebug.h>
1da177e4 34
1da177e4
LT
35#include <asm/system.h>
36#include <asm/io.h>
37#include <asm/processor.h>
38#include <asm/oplib.h>
39#include <asm/page.h>
40#include <asm/pgtable.h>
41#include <asm/traps.h>
42#include <asm/vaddrs.h>
1da177e4
LT
43#include <asm/mbus.h>
44#include <asm/idprom.h>
45#include <asm/machines.h>
46#include <asm/cpudata.h>
47#include <asm/setup.h>
48
53ae3419
SR
49#include "kernel.h"
50
1da177e4
LT
51struct screen_info screen_info = {
52 0, 0, /* orig-x, orig-y */
53 0, /* unused */
54 0, /* orig-video-page */
55 0, /* orig-video-mode */
56 128, /* orig-video-cols */
57 0,0,0, /* ega_ax, ega_bx, ega_cx */
58 54, /* orig-video-lines */
59 0, /* orig-video-isVGA */
60 16 /* orig-video-points */
61};
62
63/* Typing sync at the prom prompt calls the function pointed to by
64 * romvec->pv_synchook which I set to the following function.
65 * This should sync all filesystems and return, for now it just
66 * prints out pretty messages and returns.
67 */
68
69extern unsigned long trapbase;
1da177e4
LT
70
71/* Pretty sick eh? */
c61c65cd 72static void prom_sync_me(void)
1da177e4
LT
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
1da177e4
LT
84 prom_printf("PROM SYNC COMMAND...\n");
85 show_free_areas();
86 if(current->pid != 0) {
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 return;
100}
101
c61c65cd 102static unsigned int boot_flags __initdata = 0;
1da177e4 103#define BOOTME_DEBUG 0x1
1da177e4
LT
104
105/* Exported for mm/init.c:paging_init. */
106unsigned long cmdline_memory_size __initdata = 0;
107
108static void
109prom_console_write(struct console *con, const char *s, unsigned n)
110{
111 prom_write(s, n);
112}
113
114static struct console prom_debug_console = {
115 .name = "debug",
116 .write = prom_console_write,
117 .flags = CON_PRINTBUFFER,
118 .index = -1,
119};
120
1da177e4
LT
121/*
122 * Process kernel command line switches that are specific to the
123 * SPARC or that require special low-level processing.
124 */
125static void __init process_switch(char c)
126{
127 switch (c) {
128 case 'd':
129 boot_flags |= BOOTME_DEBUG;
130 break;
131 case 's':
1da177e4
LT
132 break;
133 case 'h':
134 prom_printf("boot_flags_init: Halt!\n");
135 prom_halt();
136 break;
137 case 'p':
138 /* Use PROM debug console. */
139 register_console(&prom_debug_console);
140 break;
141 default:
142 printk("Unknown boot switch (-%c)\n", c);
143 break;
144 }
145}
146
1da177e4
LT
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 }
c73fcc84 163 if (!strncmp(commands, "mem=", 4)) {
1da177e4
LT
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
183/* This routine will in the future do all the nasty prom stuff
184 * to probe for the mmu type and its parameters, etc. This will
9f2b2a5f 185 * also be where SMP things happen.
1da177e4
LT
186 */
187
1da177e4
LT
188extern void sun4c_probe_vac(void);
189extern char cputypval;
190extern unsigned long start, end;
1da177e4
LT
191
192extern unsigned short root_flags;
193extern unsigned short root_dev;
194extern unsigned short ram_flags;
195#define RAMDISK_IMAGE_START_MASK 0x07FF
196#define RAMDISK_PROMPT_FLAG 0x8000
197#define RAMDISK_LOAD_FLAG 0x4000
198
199extern int root_mountflags;
200
201char reboot_command[COMMAND_LINE_SIZE];
202enum sparc_cpu sparc_cpu_model;
203
204struct tt_entry *sparc_ttable;
205
206struct pt_regs fake_swapper_regs;
207
1da177e4
LT
208void __init setup_arch(char **cmdline_p)
209{
210 int i;
211 unsigned long highest_paddr;
212
213 sparc_ttable = (struct tt_entry *) &start;
214
215 /* Initialize PROM console and command line. */
216 *cmdline_p = prom_getbootargs();
08e7ca11 217 strcpy(boot_command_line, *cmdline_p);
3fbe36d8 218 parse_early_param();
1da177e4
LT
219
220 /* Set sparc_cpu_model */
221 sparc_cpu_model = sun_unknown;
365b50f0
DM
222 if (!strcmp(&cputypval,"sun4 "))
223 sparc_cpu_model = sun4;
224 if (!strcmp(&cputypval,"sun4c"))
225 sparc_cpu_model = sun4c;
226 if (!strcmp(&cputypval,"sun4m"))
227 sparc_cpu_model = sun4m;
228 if (!strcmp(&cputypval,"sun4s"))
229 sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
230 if (!strcmp(&cputypval,"sun4d"))
231 sparc_cpu_model = sun4d;
232 if (!strcmp(&cputypval,"sun4e"))
233 sparc_cpu_model = sun4e;
234 if (!strcmp(&cputypval,"sun4u"))
235 sparc_cpu_model = sun4u;
1da177e4 236
1da177e4
LT
237 printk("ARCH: ");
238 switch(sparc_cpu_model) {
239 case sun4:
240 printk("SUN4\n");
241 break;
242 case sun4c:
243 printk("SUN4C\n");
244 break;
245 case sun4m:
246 printk("SUN4M\n");
247 break;
248 case sun4d:
249 printk("SUN4D\n");
250 break;
251 case sun4e:
252 printk("SUN4E\n");
253 break;
254 case sun4u:
255 printk("SUN4U\n");
256 break;
257 default:
258 printk("UNKNOWN!\n");
259 break;
260 };
261
262#ifdef CONFIG_DUMMY_CONSOLE
263 conswitchp = &dummy_con;
264#elif defined(CONFIG_PROM_CONSOLE)
265 conswitchp = &prom_con;
266#endif
267 boot_flags_init(*cmdline_p);
268
269 idprom_init();
5110bd21 270 if (ARCH_SUN4C)
1da177e4
LT
271 sun4c_probe_vac();
272 load_mmu();
1da177e4
LT
273
274 phys_base = 0xffffffffUL;
275 highest_paddr = 0UL;
276 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
277 unsigned long top;
278
279 if (sp_banks[i].base_addr < phys_base)
280 phys_base = sp_banks[i].base_addr;
281 top = sp_banks[i].base_addr +
282 sp_banks[i].num_bytes;
283 if (highest_paddr < top)
284 highest_paddr = top;
285 }
286 pfn_base = phys_base >> PAGE_SHIFT;
287
288 if (!root_flags)
289 root_mountflags &= ~MS_RDONLY;
290 ROOT_DEV = old_decode_dev(root_dev);
5d2170ad 291#ifdef CONFIG_BLK_DEV_RAM
1da177e4
LT
292 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
293 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
294 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
295#endif
296
297 prom_setsync(prom_sync_me);
298
299 if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
300 ((*(short *)linux_dbvec) != -1)) {
301 printk("Booted under KADB. Syncing trap table.\n");
302 (*(linux_dbvec->teach_debugger))();
303 }
304
305 init_mm.context = (unsigned long) NO_CONTEXT;
306 init_task.thread.kregs = &fake_swapper_regs;
307
308 paging_init();
a23b423e
KH
309
310 smp_setup_cpu_possible_map();
1da177e4
LT
311}
312
a8cbdcea
BB
313static int ncpus_probed;
314
1da177e4
LT
315static int show_cpuinfo(struct seq_file *m, void *__unused)
316{
317 seq_printf(m,
318 "cpu\t\t: %s\n"
319 "fpu\t\t: %s\n"
320 "promlib\t\t: Version %d Revision %d\n"
321 "prom\t\t: %d.%d\n"
322 "type\t\t: %s\n"
323 "ncpus probed\t: %d\n"
324 "ncpus active\t: %d\n"
325#ifndef CONFIG_SMP
326 "CPU0Bogo\t: %lu.%02lu\n"
327 "CPU0ClkTck\t: %ld\n"
328#endif
329 ,
6c6bd8b6
SR
330 sparc_cpu_type,
331 sparc_fpu_type ,
1da177e4
LT
332 romvec->pv_romvers,
333 prom_rev,
334 romvec->pv_printrev >> 16,
335 romvec->pv_printrev & 0xffff,
336 &cputypval,
a8cbdcea 337 ncpus_probed,
1da177e4
LT
338 num_online_cpus()
339#ifndef CONFIG_SMP
340 , cpu_data(0).udelay_val/(500000/HZ),
341 (cpu_data(0).udelay_val/(5000/HZ)) % 100,
342 cpu_data(0).clock_tick
343#endif
344 );
345
346#ifdef CONFIG_SMP
347 smp_bogo(m);
348#endif
349 mmu_info(m);
350#ifdef CONFIG_SMP
351 smp_info(m);
352#endif
353 return 0;
354}
355
356static void *c_start(struct seq_file *m, loff_t *pos)
357{
358 /* The pointer we are returning is arbitrary,
359 * it just has to be non-NULL and not IS_ERR
360 * in the success case.
361 */
362 return *pos == 0 ? &c_start : NULL;
363}
364
365static void *c_next(struct seq_file *m, void *v, loff_t *pos)
366{
367 ++*pos;
368 return c_start(m, pos);
369}
370
371static void c_stop(struct seq_file *m, void *v)
372{
373}
374
872e2be7 375const struct seq_operations cpuinfo_op = {
1da177e4
LT
376 .start =c_start,
377 .next = c_next,
378 .stop = c_stop,
379 .show = show_cpuinfo,
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}
394
1da177e4 395int stop_a_enabled = 1;
a8cbdcea
BB
396
397static int __init topology_init(void)
398{
399 int i, ncpus, err;
400
401 /* Count the number of physically present processors in
402 * the machine, even on uniprocessor, so that /proc/cpuinfo
403 * output is consistent with 2.4.x
404 */
405 ncpus = 0;
406 while (!cpu_find_by_instance(ncpus, NULL, NULL))
407 ncpus++;
408 ncpus_probed = ncpus;
409
410 err = 0;
411 for_each_online_cpu(i) {
412 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
413 if (!p)
414 err = -ENOMEM;
415 else
94583779 416 register_cpu(p, i);
a8cbdcea
BB
417 }
418
419 return err;
420}
421
422subsys_initcall(topology_init);