sh: Fixup cpu_data references for the non-boot CPUs.
[linux-2.6.git] / arch / sh / kernel / setup.c
1 /*
2  * arch/sh/kernel/setup.c
3  *
4  * This file handles the architecture-dependent parts of initialization
5  *
6  *  Copyright (C) 1999  Niibe Yutaka
7  *  Copyright (C) 2002 - 2006 Paul Mundt
8  */
9 #include <linux/screen_info.h>
10 #include <linux/ioport.h>
11 #include <linux/init.h>
12 #include <linux/initrd.h>
13 #include <linux/bootmem.h>
14 #include <linux/console.h>
15 #include <linux/seq_file.h>
16 #include <linux/root_dev.h>
17 #include <linux/utsname.h>
18 #include <linux/cpu.h>
19 #include <linux/pfn.h>
20 #include <linux/fs.h>
21 #include <asm/uaccess.h>
22 #include <asm/io.h>
23 #include <asm/sections.h>
24 #include <asm/irq.h>
25 #include <asm/setup.h>
26 #include <asm/clock.h>
27
28 #ifdef CONFIG_SH_KGDB
29 #include <asm/kgdb.h>
30 static int kgdb_parse_options(char *options);
31 #endif
32 extern void * __rd_start, * __rd_end;
33 /*
34  * Machine setup..
35  */
36
37 /*
38  * Initialize loops_per_jiffy as 10000000 (1000MIPS).
39  * This value will be used at the very early stage of serial setup.
40  * The bigger value means no problem.
41  */
42 struct sh_cpuinfo boot_cpu_data = { CPU_SH_NONE, 10000000, };
43 #ifdef CONFIG_VT
44 struct screen_info screen_info;
45 #endif
46
47 #if defined(CONFIG_SH_UNKNOWN)
48 struct sh_machine_vector sh_mv;
49 #endif
50
51 extern int root_mountflags;
52
53 #define MV_NAME_SIZE 32
54
55 static struct sh_machine_vector* __init get_mv_byname(const char* name);
56
57 /*
58  * This is set up by the setup-routine at boot-time
59  */
60 #define PARAM   ((unsigned char *)empty_zero_page)
61
62 #define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
63 #define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
64 #define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
65 #define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
66 #define INITRD_START (*(unsigned long *) (PARAM+0x010))
67 #define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
68 /* ... */
69 #define COMMAND_LINE ((char *) (PARAM+0x100))
70
71 #define RAMDISK_IMAGE_START_MASK        0x07FF
72 #define RAMDISK_PROMPT_FLAG             0x8000
73 #define RAMDISK_LOAD_FLAG               0x4000
74
75 static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
76
77 static struct resource code_resource = { .name = "Kernel code", };
78 static struct resource data_resource = { .name = "Kernel data", };
79
80 unsigned long memory_start, memory_end;
81
82 static inline void parse_cmdline (char ** cmdline_p, char mv_name[MV_NAME_SIZE],
83                                   struct sh_machine_vector** mvp,
84                                   unsigned long *mv_io_base)
85 {
86         char c = ' ', *to = command_line, *from = COMMAND_LINE;
87         int len = 0;
88
89         /* Save unparsed command line copy for /proc/cmdline */
90         memcpy(boot_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
91         boot_command_line[COMMAND_LINE_SIZE-1] = '\0';
92
93         memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START;
94         memory_end = memory_start + __MEMORY_SIZE;
95
96         for (;;) {
97                 /*
98                  * "mem=XXX[kKmM]" defines a size of memory.
99                  */
100                 if (c == ' ' && !memcmp(from, "mem=", 4)) {
101                         if (to != command_line)
102                                 to--;
103                         {
104                                 unsigned long mem_size;
105
106                                 mem_size = memparse(from+4, &from);
107                                 memory_end = memory_start + mem_size;
108                         }
109                 }
110
111                 if (c == ' ' && !memcmp(from, "sh_mv=", 6)) {
112                         char* mv_end;
113                         char* mv_comma;
114                         int mv_len;
115                         if (to != command_line)
116                                 to--;
117                         from += 6;
118                         mv_end = strchr(from, ' ');
119                         if (mv_end == NULL)
120                                 mv_end = from + strlen(from);
121
122                         mv_comma = strchr(from, ',');
123                         if ((mv_comma != NULL) && (mv_comma < mv_end)) {
124                                 int ints[3];
125                                 get_options(mv_comma+1, ARRAY_SIZE(ints), ints);
126                                 *mv_io_base = ints[1];
127                                 mv_len = mv_comma - from;
128                         } else {
129                                 mv_len = mv_end - from;
130                         }
131                         if (mv_len > (MV_NAME_SIZE-1))
132                                 mv_len = MV_NAME_SIZE-1;
133                         memcpy(mv_name, from, mv_len);
134                         mv_name[mv_len] = '\0';
135                         from = mv_end;
136
137                         *mvp = get_mv_byname(mv_name);
138                 }
139
140                 c = *(from++);
141                 if (!c)
142                         break;
143                 if (COMMAND_LINE_SIZE <= ++len)
144                         break;
145                 *(to++) = c;
146         }
147         *to = '\0';
148         *cmdline_p = command_line;
149 }
150
151 static int __init sh_mv_setup(char **cmdline_p)
152 {
153 #ifdef CONFIG_SH_UNKNOWN
154         extern struct sh_machine_vector mv_unknown;
155 #endif
156         struct sh_machine_vector *mv = NULL;
157         char mv_name[MV_NAME_SIZE] = "";
158         unsigned long mv_io_base = 0;
159
160         parse_cmdline(cmdline_p, mv_name, &mv, &mv_io_base);
161
162 #ifdef CONFIG_SH_UNKNOWN
163         if (mv == NULL) {
164                 mv = &mv_unknown;
165                 if (*mv_name != '\0') {
166                         printk("Warning: Unsupported machine %s, using unknown\n",
167                                mv_name);
168                 }
169         }
170         sh_mv = *mv;
171 #endif
172
173         /*
174          * Manually walk the vec, fill in anything that the board hasn't yet
175          * by hand, wrapping to the generic implementation.
176          */
177 #define mv_set(elem) do { \
178         if (!sh_mv.mv_##elem) \
179                 sh_mv.mv_##elem = generic_##elem; \
180 } while (0)
181
182         mv_set(inb);    mv_set(inw);    mv_set(inl);
183         mv_set(outb);   mv_set(outw);   mv_set(outl);
184
185         mv_set(inb_p);  mv_set(inw_p);  mv_set(inl_p);
186         mv_set(outb_p); mv_set(outw_p); mv_set(outl_p);
187
188         mv_set(insb);   mv_set(insw);   mv_set(insl);
189         mv_set(outsb);  mv_set(outsw);  mv_set(outsl);
190
191         mv_set(readb);  mv_set(readw);  mv_set(readl);
192         mv_set(writeb); mv_set(writew); mv_set(writel);
193
194         mv_set(ioport_map);
195         mv_set(ioport_unmap);
196         mv_set(irq_demux);
197
198 #ifdef CONFIG_SH_UNKNOWN
199         __set_io_port_base(mv_io_base);
200 #endif
201
202         if (!sh_mv.mv_nr_irqs)
203                 sh_mv.mv_nr_irqs = NR_IRQS;
204
205         return 0;
206 }
207
208 void __init setup_arch(char **cmdline_p)
209 {
210         unsigned long bootmap_size;
211         unsigned long start_pfn, max_pfn, max_low_pfn;
212
213 #ifdef CONFIG_CMDLINE_BOOL
214         strcpy(COMMAND_LINE, CONFIG_CMDLINE);
215 #endif
216
217         ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
218
219 #ifdef CONFIG_BLK_DEV_RAM
220         rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
221         rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
222         rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
223 #endif
224
225         if (!MOUNT_ROOT_RDONLY)
226                 root_mountflags &= ~MS_RDONLY;
227         init_mm.start_code = (unsigned long) _text;
228         init_mm.end_code = (unsigned long) _etext;
229         init_mm.end_data = (unsigned long) _edata;
230         init_mm.brk = (unsigned long) _end;
231
232         code_resource.start = (unsigned long)virt_to_phys(_text);
233         code_resource.end = (unsigned long)virt_to_phys(_etext)-1;
234         data_resource.start = (unsigned long)virt_to_phys(_etext);
235         data_resource.end = (unsigned long)virt_to_phys(_edata)-1;
236
237         sh_mv_setup(cmdline_p);
238
239
240         /*
241          * Find the highest page frame number we have available
242          */
243         max_pfn = PFN_DOWN(__pa(memory_end));
244
245         /*
246          * Determine low and high memory ranges:
247          */
248         max_low_pfn = max_pfn;
249
250         /*
251          * Partially used pages are not usable - thus
252          * we are rounding upwards:
253          */
254         start_pfn = PFN_UP(__pa(_end));
255
256         /*
257          * Find a proper area for the bootmem bitmap. After this
258          * bootstrap step all allocations (until the page allocator
259          * is intact) must be done via bootmem_alloc().
260          */
261         bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
262                                          __MEMORY_START>>PAGE_SHIFT,
263                                          max_low_pfn);
264         /*
265          * Register fully available low RAM pages with the bootmem allocator.
266          */
267         {
268                 unsigned long curr_pfn, last_pfn, pages;
269
270                 /*
271                  * We are rounding up the start address of usable memory:
272                  */
273                 curr_pfn = PFN_UP(__MEMORY_START);
274                 /*
275                  * ... and at the end of the usable range downwards:
276                  */
277                 last_pfn = PFN_DOWN(__pa(memory_end));
278
279                 if (last_pfn > max_low_pfn)
280                         last_pfn = max_low_pfn;
281
282                 pages = last_pfn - curr_pfn;
283                 free_bootmem_node(NODE_DATA(0), PFN_PHYS(curr_pfn),
284                                   PFN_PHYS(pages));
285         }
286
287
288         /*
289          * Reserve the kernel text and
290          * Reserve the bootmem bitmap. We do this in two steps (first step
291          * was init_bootmem()), because this catches the (definitely buggy)
292          * case of us accidentally initializing the bootmem allocator with
293          * an invalid RAM area.
294          */
295         reserve_bootmem_node(NODE_DATA(0), __MEMORY_START+PAGE_SIZE,
296                 (PFN_PHYS(start_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);
297
298         /*
299          * reserve physical page 0 - it's a special BIOS page on many boxes,
300          * enabling clean reboots, SMP operation, laptop functions.
301          */
302         reserve_bootmem_node(NODE_DATA(0), __MEMORY_START, PAGE_SIZE);
303
304 #ifdef CONFIG_BLK_DEV_INITRD
305         ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
306         if (&__rd_start != &__rd_end) {
307                 LOADER_TYPE = 1;
308                 INITRD_START = PHYSADDR((unsigned long)&__rd_start) -
309                                         __MEMORY_START;
310                 INITRD_SIZE = (unsigned long)&__rd_end -
311                               (unsigned long)&__rd_start;
312         }
313
314         if (LOADER_TYPE && INITRD_START) {
315                 if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
316                         reserve_bootmem_node(NODE_DATA(0), INITRD_START +
317                                                 __MEMORY_START, INITRD_SIZE);
318                         initrd_start = INITRD_START + PAGE_OFFSET +
319                                         __MEMORY_START;
320                         initrd_end = initrd_start + INITRD_SIZE;
321                 } else {
322                         printk("initrd extends beyond end of memory "
323                             "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
324                                     INITRD_START + INITRD_SIZE,
325                                     max_low_pfn << PAGE_SHIFT);
326                         initrd_start = 0;
327                 }
328         }
329 #endif
330
331 #ifdef CONFIG_DUMMY_CONSOLE
332         conswitchp = &dummy_con;
333 #endif
334
335         /* Perform the machine specific initialisation */
336         if (likely(sh_mv.mv_setup))
337                 sh_mv.mv_setup(cmdline_p);
338
339         paging_init();
340 }
341
342 struct sh_machine_vector* __init get_mv_byname(const char* name)
343 {
344         extern long __machvec_start, __machvec_end;
345         struct sh_machine_vector *all_vecs =
346                 (struct sh_machine_vector *)&__machvec_start;
347
348         int i, n = ((unsigned long)&__machvec_end
349                     - (unsigned long)&__machvec_start)/
350                 sizeof(struct sh_machine_vector);
351
352         for (i = 0; i < n; ++i) {
353                 struct sh_machine_vector *mv = &all_vecs[i];
354                 if (mv == NULL)
355                         continue;
356                 if (strcasecmp(name, get_system_type()) == 0) {
357                         return mv;
358                 }
359         }
360         return NULL;
361 }
362
363 static struct cpu cpu[NR_CPUS];
364
365 static int __init topology_init(void)
366 {
367         int cpu_id;
368
369         for_each_possible_cpu(cpu_id)
370                 register_cpu(&cpu[cpu_id], cpu_id);
371
372         return 0;
373 }
374
375 subsys_initcall(topology_init);
376
377 static const char *cpu_name[] = {
378         [CPU_SH7206]    = "SH7206",     [CPU_SH7619]    = "SH7619",
379         [CPU_SH7604]    = "SH7604",     [CPU_SH7300]    = "SH7300",
380         [CPU_SH7705]    = "SH7705",     [CPU_SH7706]    = "SH7706",
381         [CPU_SH7707]    = "SH7707",     [CPU_SH7708]    = "SH7708",
382         [CPU_SH7709]    = "SH7709",     [CPU_SH7710]    = "SH7710",
383         [CPU_SH7729]    = "SH7729",     [CPU_SH7750]    = "SH7750",
384         [CPU_SH7750S]   = "SH7750S",    [CPU_SH7750R]   = "SH7750R",
385         [CPU_SH7751]    = "SH7751",     [CPU_SH7751R]   = "SH7751R",
386         [CPU_SH7760]    = "SH7760",     [CPU_SH73180]   = "SH73180",
387         [CPU_ST40RA]    = "ST40RA",     [CPU_ST40GX1]   = "ST40GX1",
388         [CPU_SH4_202]   = "SH4-202",    [CPU_SH4_501]   = "SH4-501",
389         [CPU_SH7770]    = "SH7770",     [CPU_SH7780]    = "SH7780",
390         [CPU_SH7781]    = "SH7781",     [CPU_SH7343]    = "SH7343",
391         [CPU_SH7785]    = "SH7785",     [CPU_SH7722]    = "SH7722",
392         [CPU_SH_NONE]   = "Unknown"
393 };
394
395 const char *get_cpu_subtype(struct sh_cpuinfo *c)
396 {
397         return cpu_name[c->type];
398 }
399
400 #ifdef CONFIG_PROC_FS
401 /* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
402 static const char *cpu_flags[] = {
403         "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
404         "ptea", "llsc", "l2", NULL
405 };
406
407 static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c)
408 {
409         unsigned long i;
410
411         seq_printf(m, "cpu flags\t:");
412
413         if (!c->flags) {
414                 seq_printf(m, " %s\n", cpu_flags[0]);
415                 return;
416         }
417
418         for (i = 0; cpu_flags[i]; i++)
419                 if ((c->flags & (1 << i)))
420                         seq_printf(m, " %s", cpu_flags[i+1]);
421
422         seq_printf(m, "\n");
423 }
424
425 static void show_cacheinfo(struct seq_file *m, const char *type,
426                            struct cache_info info)
427 {
428         unsigned int cache_size;
429
430         cache_size = info.ways * info.sets * info.linesz;
431
432         seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
433                    type, cache_size >> 10, info.ways);
434 }
435
436 /*
437  *      Get CPU information for use by the procfs.
438  */
439 static int show_cpuinfo(struct seq_file *m, void *v)
440 {
441         struct sh_cpuinfo *c = v;
442         unsigned int cpu = c - cpu_data;
443
444         if (!cpu_online(cpu))
445                 return 0;
446
447         if (cpu == 0)
448                 seq_printf(m, "machine\t\t: %s\n", get_system_type());
449
450         seq_printf(m, "processor\t: %d\n", cpu);
451         seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
452         seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));
453
454         show_cpuflags(m, c);
455
456         seq_printf(m, "cache type\t: ");
457
458         /*
459          * Check for what type of cache we have, we support both the
460          * unified cache on the SH-2 and SH-3, as well as the harvard
461          * style cache on the SH-4.
462          */
463         if (c->icache.flags & SH_CACHE_COMBINED) {
464                 seq_printf(m, "unified\n");
465                 show_cacheinfo(m, "cache", c->icache);
466         } else {
467                 seq_printf(m, "split (harvard)\n");
468                 show_cacheinfo(m, "icache", c->icache);
469                 show_cacheinfo(m, "dcache", c->dcache);
470         }
471
472         /* Optional secondary cache */
473         if (c->flags & CPU_HAS_L2_CACHE)
474                 show_cacheinfo(m, "scache", c->scache);
475
476         seq_printf(m, "bogomips\t: %lu.%02lu\n",
477                      c->loops_per_jiffy/(500000/HZ),
478                      (c->loops_per_jiffy/(5000/HZ)) % 100);
479
480         return show_clocks(m);
481 }
482
483 static void *c_start(struct seq_file *m, loff_t *pos)
484 {
485         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
486 }
487 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
488 {
489         ++*pos;
490         return c_start(m, pos);
491 }
492 static void c_stop(struct seq_file *m, void *v)
493 {
494 }
495 struct seq_operations cpuinfo_op = {
496         .start  = c_start,
497         .next   = c_next,
498         .stop   = c_stop,
499         .show   = show_cpuinfo,
500 };
501 #endif /* CONFIG_PROC_FS */
502
503 #ifdef CONFIG_SH_KGDB
504 /*
505  * Parse command-line kgdb options.  By default KGDB is enabled,
506  * entered on error (or other action) using default serial info.
507  * The command-line option can include a serial port specification
508  * and an action to override default or configured behavior.
509  */
510 struct kgdb_sermap kgdb_sci_sermap =
511 { "ttySC", 5, kgdb_sci_setup, NULL };
512
513 struct kgdb_sermap *kgdb_serlist = &kgdb_sci_sermap;
514 struct kgdb_sermap *kgdb_porttype = &kgdb_sci_sermap;
515
516 void kgdb_register_sermap(struct kgdb_sermap *map)
517 {
518         struct kgdb_sermap *last;
519
520         for (last = kgdb_serlist; last->next; last = last->next)
521                 ;
522         last->next = map;
523         if (!map->namelen) {
524                 map->namelen = strlen(map->name);
525         }
526 }
527
528 static int __init kgdb_parse_options(char *options)
529 {
530         char c;
531         int baud;
532
533         /* Check for port spec (or use default) */
534
535         /* Determine port type and instance */
536         if (!memcmp(options, "tty", 3)) {
537                 struct kgdb_sermap *map = kgdb_serlist;
538
539                 while (map && memcmp(options, map->name, map->namelen))
540                         map = map->next;
541
542                 if (!map) {
543                         KGDB_PRINTK("unknown port spec in %s\n", options);
544                         return -1;
545                 }
546
547                 kgdb_porttype = map;
548                 kgdb_serial_setup = map->setup_fn;
549                 kgdb_portnum = options[map->namelen] - '0';
550                 options += map->namelen + 1;
551
552                 options = (*options == ',') ? options+1 : options;
553
554                 /* Read optional parameters (baud/parity/bits) */
555                 baud = simple_strtoul(options, &options, 10);
556                 if (baud != 0) {
557                         kgdb_baud = baud;
558
559                         c = toupper(*options);
560                         if (c == 'E' || c == 'O' || c == 'N') {
561                                 kgdb_parity = c;
562                                 options++;
563                         }
564
565                         c = *options;
566                         if (c == '7' || c == '8') {
567                                 kgdb_bits = c;
568                                 options++;
569                         }
570                         options = (*options == ',') ? options+1 : options;
571                 }
572         }
573
574         /* Check for action specification */
575         if (!memcmp(options, "halt", 4)) {
576                 kgdb_halt = 1;
577                 options += 4;
578         } else if (!memcmp(options, "disabled", 8)) {
579                 kgdb_enabled = 0;
580                 options += 8;
581         }
582
583         if (*options) {
584                 KGDB_PRINTK("ignored unknown options: %s\n", options);
585                 return 0;
586         }
587         return 1;
588 }
589 __setup("kgdb=", kgdb_parse_options);
590 #endif /* CONFIG_SH_KGDB */