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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc/kernel/setup.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/sparc/kernel/setup.c')
-rw-r--r--arch/sparc/kernel/setup.c476
1 files changed, 476 insertions, 0 deletions
diff --git a/arch/sparc/kernel/setup.c b/arch/sparc/kernel/setup.c
new file mode 100644
index 000000000000..55352ed85e8a
--- /dev/null
+++ b/arch/sparc/kernel/setup.c
@@ -0,0 +1,476 @@
1/* $Id: setup.c,v 1.126 2001/11/13 00:49:27 davem Exp $
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/a.out.h>
20#include <linux/tty.h>
21#include <linux/delay.h>
22#include <linux/config.h>
23#include <linux/fs.h>
24#include <linux/seq_file.h>
25#include <linux/syscalls.h>
26#include <linux/kdev_t.h>
27#include <linux/major.h>
28#include <linux/string.h>
29#include <linux/init.h>
30#include <linux/interrupt.h>
31#include <linux/console.h>
32#include <linux/spinlock.h>
33#include <linux/root_dev.h>
34
35#include <asm/segment.h>
36#include <asm/system.h>
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/kdebug.h>
45#include <asm/mbus.h>
46#include <asm/idprom.h>
47#include <asm/machines.h>
48#include <asm/cpudata.h>
49#include <asm/setup.h>
50
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;
70void (*prom_palette)(int);
71
72/* Pretty sick eh? */
73void prom_sync_me(void)
74{
75 unsigned long prom_tbr, flags;
76
77 /* XXX Badly broken. FIX! - Anton */
78 local_irq_save(flags);
79 __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
80 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
81 "nop\n\t"
82 "nop\n\t"
83 "nop\n\t" : : "r" (&trapbase));
84
85 if (prom_palette)
86 prom_palette(1);
87 prom_printf("PROM SYNC COMMAND...\n");
88 show_free_areas();
89 if(current->pid != 0) {
90 local_irq_enable();
91 sys_sync();
92 local_irq_disable();
93 }
94 prom_printf("Returning to prom\n");
95
96 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
97 "nop\n\t"
98 "nop\n\t"
99 "nop\n\t" : : "r" (prom_tbr));
100 local_irq_restore(flags);
101
102 return;
103}
104
105unsigned int boot_flags __initdata = 0;
106#define BOOTME_DEBUG 0x1
107#define BOOTME_SINGLE 0x2
108
109/* Exported for mm/init.c:paging_init. */
110unsigned long cmdline_memory_size __initdata = 0;
111
112static void
113prom_console_write(struct console *con, const char *s, unsigned n)
114{
115 prom_write(s, n);
116}
117
118static struct console prom_debug_console = {
119 .name = "debug",
120 .write = prom_console_write,
121 .flags = CON_PRINTBUFFER,
122 .index = -1,
123};
124
125int obp_system_intr(void)
126{
127 if (boot_flags & BOOTME_DEBUG) {
128 printk("OBP: system interrupted\n");
129 prom_halt();
130 return 1;
131 }
132 return 0;
133}
134
135/*
136 * Process kernel command line switches that are specific to the
137 * SPARC or that require special low-level processing.
138 */
139static void __init process_switch(char c)
140{
141 switch (c) {
142 case 'd':
143 boot_flags |= BOOTME_DEBUG;
144 break;
145 case 's':
146 boot_flags |= BOOTME_SINGLE;
147 break;
148 case 'h':
149 prom_printf("boot_flags_init: Halt!\n");
150 prom_halt();
151 break;
152 case 'p':
153 /* Use PROM debug console. */
154 register_console(&prom_debug_console);
155 break;
156 default:
157 printk("Unknown boot switch (-%c)\n", c);
158 break;
159 }
160}
161
162static void __init process_console(char *commands)
163{
164 serial_console = 0;
165 commands += 8;
166 /* Linux-style serial */
167 if (!strncmp(commands, "ttyS", 4))
168 serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
169 else if (!strncmp(commands, "tty", 3)) {
170 char c = *(commands + 3);
171 /* Solaris-style serial */
172 if (c == 'a' || c == 'b')
173 serial_console = c - 'a' + 1;
174 /* else Linux-style fbcon, not serial */
175 }
176#if defined(CONFIG_PROM_CONSOLE)
177 if (!strncmp(commands, "prom", 4)) {
178 char *p;
179
180 for (p = commands - 8; *p && *p != ' '; p++)
181 *p = ' ';
182 conswitchp = &prom_con;
183 }
184#endif
185}
186
187static void __init boot_flags_init(char *commands)
188{
189 while (*commands) {
190 /* Move to the start of the next "argument". */
191 while (*commands && *commands == ' ')
192 commands++;
193
194 /* Process any command switches, otherwise skip it. */
195 if (*commands == '\0')
196 break;
197 if (*commands == '-') {
198 commands++;
199 while (*commands && *commands != ' ')
200 process_switch(*commands++);
201 continue;
202 }
203 if (!strncmp(commands, "console=", 8)) {
204 process_console(commands);
205 } else if (!strncmp(commands, "mem=", 4)) {
206 /*
207 * "mem=XXX[kKmM] overrides the PROM-reported
208 * memory size.
209 */
210 cmdline_memory_size = simple_strtoul(commands + 4,
211 &commands, 0);
212 if (*commands == 'K' || *commands == 'k') {
213 cmdline_memory_size <<= 10;
214 commands++;
215 } else if (*commands=='M' || *commands=='m') {
216 cmdline_memory_size <<= 20;
217 commands++;
218 }
219 }
220 while (*commands && *commands != ' ')
221 commands++;
222 }
223}
224
225/* This routine will in the future do all the nasty prom stuff
226 * to probe for the mmu type and its parameters, etc. This will
227 * also be where SMP things happen plus the Sparc specific memory
228 * physical memory probe as on the alpha.
229 */
230
231extern int prom_probe_memory(void);
232extern void sun4c_probe_vac(void);
233extern char cputypval;
234extern unsigned long start, end;
235extern void panic_setup(char *, int *);
236
237extern unsigned short root_flags;
238extern unsigned short root_dev;
239extern unsigned short ram_flags;
240#define RAMDISK_IMAGE_START_MASK 0x07FF
241#define RAMDISK_PROMPT_FLAG 0x8000
242#define RAMDISK_LOAD_FLAG 0x4000
243
244extern int root_mountflags;
245
246char reboot_command[COMMAND_LINE_SIZE];
247enum sparc_cpu sparc_cpu_model;
248
249struct tt_entry *sparc_ttable;
250
251struct pt_regs fake_swapper_regs;
252
253extern void paging_init(void);
254
255void __init setup_arch(char **cmdline_p)
256{
257 int i;
258 unsigned long highest_paddr;
259
260 sparc_ttable = (struct tt_entry *) &start;
261
262 /* Initialize PROM console and command line. */
263 *cmdline_p = prom_getbootargs();
264 strcpy(saved_command_line, *cmdline_p);
265
266 /* Set sparc_cpu_model */
267 sparc_cpu_model = sun_unknown;
268 if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; }
269 if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; }
270 if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; }
271 if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; } /* CP-1200 with PROM 2.30 -E */
272 if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; }
273 if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; }
274 if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; }
275
276#ifdef CONFIG_SUN4
277 if (sparc_cpu_model != sun4) {
278 prom_printf("This kernel is for Sun4 architecture only.\n");
279 prom_halt();
280 }
281#endif
282 printk("ARCH: ");
283 switch(sparc_cpu_model) {
284 case sun4:
285 printk("SUN4\n");
286 break;
287 case sun4c:
288 printk("SUN4C\n");
289 break;
290 case sun4m:
291 printk("SUN4M\n");
292 break;
293 case sun4d:
294 printk("SUN4D\n");
295 break;
296 case sun4e:
297 printk("SUN4E\n");
298 break;
299 case sun4u:
300 printk("SUN4U\n");
301 break;
302 default:
303 printk("UNKNOWN!\n");
304 break;
305 };
306
307#ifdef CONFIG_DUMMY_CONSOLE
308 conswitchp = &dummy_con;
309#elif defined(CONFIG_PROM_CONSOLE)
310 conswitchp = &prom_con;
311#endif
312 boot_flags_init(*cmdline_p);
313
314 idprom_init();
315 if (ARCH_SUN4C_SUN4)
316 sun4c_probe_vac();
317 load_mmu();
318 (void) prom_probe_memory();
319
320 phys_base = 0xffffffffUL;
321 highest_paddr = 0UL;
322 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
323 unsigned long top;
324
325 if (sp_banks[i].base_addr < phys_base)
326 phys_base = sp_banks[i].base_addr;
327 top = sp_banks[i].base_addr +
328 sp_banks[i].num_bytes;
329 if (highest_paddr < top)
330 highest_paddr = top;
331 }
332 pfn_base = phys_base >> PAGE_SHIFT;
333
334 if (!root_flags)
335 root_mountflags &= ~MS_RDONLY;
336 ROOT_DEV = old_decode_dev(root_dev);
337#ifdef CONFIG_BLK_DEV_INITRD
338 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
339 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
340 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
341#endif
342
343 prom_setsync(prom_sync_me);
344
345 if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
346 ((*(short *)linux_dbvec) != -1)) {
347 printk("Booted under KADB. Syncing trap table.\n");
348 (*(linux_dbvec->teach_debugger))();
349 }
350
351 init_mm.context = (unsigned long) NO_CONTEXT;
352 init_task.thread.kregs = &fake_swapper_regs;
353
354 paging_init();
355}
356
357static int __init set_preferred_console(void)
358{
359 int idev, odev;
360
361 /* The user has requested a console so this is already set up. */
362 if (serial_console >= 0)
363 return -EBUSY;
364
365 idev = prom_query_input_device();
366 odev = prom_query_output_device();
367 if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
368 serial_console = 0;
369 } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
370 serial_console = 1;
371 } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
372 serial_console = 2;
373 } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) {
374 prom_printf("MrCoffee ttya\n");
375 serial_console = 1;
376 } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) {
377 serial_console = 0;
378 prom_printf("MrCoffee keyboard\n");
379 } else {
380 prom_printf("Confusing console (idev %d, odev %d)\n",
381 idev, odev);
382 serial_console = 1;
383 }
384
385 if (serial_console)
386 return add_preferred_console("ttyS", serial_console - 1, NULL);
387
388 return -ENODEV;
389}
390console_initcall(set_preferred_console);
391
392extern char *sparc_cpu_type;
393extern char *sparc_fpu_type;
394
395static int show_cpuinfo(struct seq_file *m, void *__unused)
396{
397 seq_printf(m,
398 "cpu\t\t: %s\n"
399 "fpu\t\t: %s\n"
400 "promlib\t\t: Version %d Revision %d\n"
401 "prom\t\t: %d.%d\n"
402 "type\t\t: %s\n"
403 "ncpus probed\t: %d\n"
404 "ncpus active\t: %d\n"
405#ifndef CONFIG_SMP
406 "CPU0Bogo\t: %lu.%02lu\n"
407 "CPU0ClkTck\t: %ld\n"
408#endif
409 ,
410 sparc_cpu_type ? sparc_cpu_type : "undetermined",
411 sparc_fpu_type ? sparc_fpu_type : "undetermined",
412 romvec->pv_romvers,
413 prom_rev,
414 romvec->pv_printrev >> 16,
415 romvec->pv_printrev & 0xffff,
416 &cputypval,
417 num_possible_cpus(),
418 num_online_cpus()
419#ifndef CONFIG_SMP
420 , cpu_data(0).udelay_val/(500000/HZ),
421 (cpu_data(0).udelay_val/(5000/HZ)) % 100,
422 cpu_data(0).clock_tick
423#endif
424 );
425
426#ifdef CONFIG_SMP
427 smp_bogo(m);
428#endif
429 mmu_info(m);
430#ifdef CONFIG_SMP
431 smp_info(m);
432#endif
433 return 0;
434}
435
436static void *c_start(struct seq_file *m, loff_t *pos)
437{
438 /* The pointer we are returning is arbitrary,
439 * it just has to be non-NULL and not IS_ERR
440 * in the success case.
441 */
442 return *pos == 0 ? &c_start : NULL;
443}
444
445static void *c_next(struct seq_file *m, void *v, loff_t *pos)
446{
447 ++*pos;
448 return c_start(m, pos);
449}
450
451static void c_stop(struct seq_file *m, void *v)
452{
453}
454
455struct seq_operations cpuinfo_op = {
456 .start =c_start,
457 .next = c_next,
458 .stop = c_stop,
459 .show = show_cpuinfo,
460};
461
462extern int stop_a_enabled;
463
464void sun_do_break(void)
465{
466 if (!stop_a_enabled)
467 return;
468
469 printk("\n");
470 flush_user_windows();
471
472 prom_cmdline();
473}
474
475int serial_console = -1;
476int stop_a_enabled = 1;