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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / sh / kernel / setup.c
1 /* $Id: setup.c,v 1.30 2003/10/13 07:21:19 lethal Exp $
2 *
3 * linux/arch/sh/kernel/setup.c
4 *
5 * Copyright (C) 1999 Niibe Yutaka
6 * Copyright (C) 2002, 2003 Paul Mundt
7 */
8
9 /*
10 * This file handles the architecture-dependent parts of initialization
11 */
12
13 #include <linux/tty.h>
14 #include <linux/ioport.h>
15 #include <linux/init.h>
16 #include <linux/initrd.h>
17 #include <linux/bootmem.h>
18 #include <linux/console.h>
19 #include <linux/seq_file.h>
20 #include <linux/root_dev.h>
21 #include <linux/utsname.h>
22 #include <linux/cpu.h>
23 #include <asm/uaccess.h>
24 #include <asm/io.h>
25 #include <asm/sections.h>
26 #include <asm/irq.h>
27 #include <asm/setup.h>
28 #include <asm/clock.h>
29
30 #ifdef CONFIG_SH_KGDB
31 #include <asm/kgdb.h>
32 static int kgdb_parse_options(char *options);
33 #endif
34 extern void * __rd_start, * __rd_end;
35 /*
36 * Machine setup..
37 */
38
39 /*
40 * Initialize loops_per_jiffy as 10000000 (1000MIPS).
41 * This value will be used at the very early stage of serial setup.
42 * The bigger value means no problem.
43 */
44 struct sh_cpuinfo boot_cpu_data = { CPU_SH_NONE, 10000000, };
45 struct screen_info screen_info;
46
47 #if defined(CONFIG_SH_UNKNOWN)
48 struct sh_machine_vector sh_mv;
49 #endif
50
51 /* We need this to satisfy some external references. */
52 struct screen_info screen_info = {
53 0, 25, /* orig-x, orig-y */
54 0, /* unused */
55 0, /* orig-video-page */
56 0, /* orig-video-mode */
57 80, /* orig-video-cols */
58 0,0,0, /* ega_ax, ega_bx, ega_cx */
59 25, /* orig-video-lines */
60 0, /* orig-video-isVGA */
61 16 /* orig-video-points */
62 };
63
64 extern void platform_setup(void);
65 extern char *get_system_type(void);
66 extern int root_mountflags;
67
68 #define MV_NAME_SIZE 32
69
70 static struct sh_machine_vector* __init get_mv_byname(const char* name);
71
72 /*
73 * This is set up by the setup-routine at boot-time
74 */
75 #define PARAM ((unsigned char *)empty_zero_page)
76
77 #define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
78 #define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
79 #define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
80 #define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
81 #define INITRD_START (*(unsigned long *) (PARAM+0x010))
82 #define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
83 /* ... */
84 #define COMMAND_LINE ((char *) (PARAM+0x100))
85
86 #define RAMDISK_IMAGE_START_MASK 0x07FF
87 #define RAMDISK_PROMPT_FLAG 0x8000
88 #define RAMDISK_LOAD_FLAG 0x4000
89
90 static char command_line[COMMAND_LINE_SIZE] = { 0, };
91
92 struct resource standard_io_resources[] = {
93 { "dma1", 0x00, 0x1f },
94 { "pic1", 0x20, 0x3f },
95 { "timer", 0x40, 0x5f },
96 { "keyboard", 0x60, 0x6f },
97 { "dma page reg", 0x80, 0x8f },
98 { "pic2", 0xa0, 0xbf },
99 { "dma2", 0xc0, 0xdf },
100 { "fpu", 0xf0, 0xff }
101 };
102
103 #define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource))
104
105 /* System RAM - interrupted by the 640kB-1M hole */
106 #define code_resource (ram_resources[3])
107 #define data_resource (ram_resources[4])
108 static struct resource ram_resources[] = {
109 { "System RAM", 0x000000, 0x09ffff, IORESOURCE_BUSY },
110 { "System RAM", 0x100000, 0x100000, IORESOURCE_BUSY },
111 { "Video RAM area", 0x0a0000, 0x0bffff },
112 { "Kernel code", 0x100000, 0 },
113 { "Kernel data", 0, 0 }
114 };
115
116 unsigned long memory_start, memory_end;
117
118 static inline void parse_cmdline (char ** cmdline_p, char mv_name[MV_NAME_SIZE],
119 struct sh_machine_vector** mvp,
120 unsigned long *mv_io_base,
121 int *mv_mmio_enable)
122 {
123 char c = ' ', *to = command_line, *from = COMMAND_LINE;
124 int len = 0;
125
126 /* Save unparsed command line copy for /proc/cmdline */
127 memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
128 saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
129
130 memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START;
131 memory_end = memory_start + __MEMORY_SIZE;
132
133 for (;;) {
134 /*
135 * "mem=XXX[kKmM]" defines a size of memory.
136 */
137 if (c == ' ' && !memcmp(from, "mem=", 4)) {
138 if (to != command_line)
139 to--;
140 {
141 unsigned long mem_size;
142
143 mem_size = memparse(from+4, &from);
144 memory_end = memory_start + mem_size;
145 }
146 }
147 if (c == ' ' && !memcmp(from, "sh_mv=", 6)) {
148 char* mv_end;
149 char* mv_comma;
150 int mv_len;
151 if (to != command_line)
152 to--;
153 from += 6;
154 mv_end = strchr(from, ' ');
155 if (mv_end == NULL)
156 mv_end = from + strlen(from);
157
158 mv_comma = strchr(from, ',');
159 if ((mv_comma != NULL) && (mv_comma < mv_end)) {
160 int ints[3];
161 get_options(mv_comma+1, ARRAY_SIZE(ints), ints);
162 *mv_io_base = ints[1];
163 *mv_mmio_enable = ints[2];
164 mv_len = mv_comma - from;
165 } else {
166 mv_len = mv_end - from;
167 }
168 if (mv_len > (MV_NAME_SIZE-1))
169 mv_len = MV_NAME_SIZE-1;
170 memcpy(mv_name, from, mv_len);
171 mv_name[mv_len] = '\0';
172 from = mv_end;
173
174 *mvp = get_mv_byname(mv_name);
175 }
176 c = *(from++);
177 if (!c)
178 break;
179 if (COMMAND_LINE_SIZE <= ++len)
180 break;
181 *(to++) = c;
182 }
183 *to = '\0';
184 *cmdline_p = command_line;
185 }
186
187 static int __init sh_mv_setup(char **cmdline_p)
188 {
189 #ifdef CONFIG_SH_UNKNOWN
190 extern struct sh_machine_vector mv_unknown;
191 #endif
192 struct sh_machine_vector *mv = NULL;
193 char mv_name[MV_NAME_SIZE] = "";
194 unsigned long mv_io_base = 0;
195 int mv_mmio_enable = 0;
196
197 parse_cmdline(cmdline_p, mv_name, &mv, &mv_io_base, &mv_mmio_enable);
198
199 #ifdef CONFIG_SH_UNKNOWN
200 if (mv == NULL) {
201 mv = &mv_unknown;
202 if (*mv_name != '\0') {
203 printk("Warning: Unsupported machine %s, using unknown\n",
204 mv_name);
205 }
206 }
207 sh_mv = *mv;
208 #endif
209
210 /*
211 * Manually walk the vec, fill in anything that the board hasn't yet
212 * by hand, wrapping to the generic implementation.
213 */
214 #define mv_set(elem) do { \
215 if (!sh_mv.mv_##elem) \
216 sh_mv.mv_##elem = generic_##elem; \
217 } while (0)
218
219 mv_set(inb); mv_set(inw); mv_set(inl);
220 mv_set(outb); mv_set(outw); mv_set(outl);
221
222 mv_set(inb_p); mv_set(inw_p); mv_set(inl_p);
223 mv_set(outb_p); mv_set(outw_p); mv_set(outl_p);
224
225 mv_set(insb); mv_set(insw); mv_set(insl);
226 mv_set(outsb); mv_set(outsw); mv_set(outsl);
227
228 mv_set(readb); mv_set(readw); mv_set(readl);
229 mv_set(writeb); mv_set(writew); mv_set(writel);
230
231 mv_set(ioport_map);
232 mv_set(ioport_unmap);
233 mv_set(irq_demux);
234
235 #ifdef CONFIG_SH_UNKNOWN
236 __set_io_port_base(mv_io_base);
237 #endif
238
239 return 0;
240 }
241
242 void __init setup_arch(char **cmdline_p)
243 {
244 unsigned long bootmap_size;
245 unsigned long start_pfn, max_pfn, max_low_pfn;
246
247 #ifdef CONFIG_EARLY_PRINTK
248 extern void enable_early_printk(void);
249
250 enable_early_printk();
251 #endif
252 #ifdef CONFIG_CMDLINE_BOOL
253 strcpy(COMMAND_LINE, CONFIG_CMDLINE);
254 #endif
255
256 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
257
258 #ifdef CONFIG_BLK_DEV_RAM
259 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
260 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
261 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
262 #endif
263
264 if (!MOUNT_ROOT_RDONLY)
265 root_mountflags &= ~MS_RDONLY;
266 init_mm.start_code = (unsigned long) _text;
267 init_mm.end_code = (unsigned long) _etext;
268 init_mm.end_data = (unsigned long) _edata;
269 init_mm.brk = (unsigned long) _end;
270
271 code_resource.start = (unsigned long)virt_to_phys(_text);
272 code_resource.end = (unsigned long)virt_to_phys(_etext)-1;
273 data_resource.start = (unsigned long)virt_to_phys(_etext);
274 data_resource.end = (unsigned long)virt_to_phys(_edata)-1;
275
276 sh_mv_setup(cmdline_p);
277
278 #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
279 #define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
280 #define PFN_PHYS(x) ((x) << PAGE_SHIFT)
281
282 /*
283 * Find the highest page frame number we have available
284 */
285 max_pfn = PFN_DOWN(__pa(memory_end));
286
287 /*
288 * Determine low and high memory ranges:
289 */
290 max_low_pfn = max_pfn;
291
292 /*
293 * Partially used pages are not usable - thus
294 * we are rounding upwards:
295 */
296 start_pfn = PFN_UP(__pa(_end));
297
298 /*
299 * Find a proper area for the bootmem bitmap. After this
300 * bootstrap step all allocations (until the page allocator
301 * is intact) must be done via bootmem_alloc().
302 */
303 bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
304 __MEMORY_START>>PAGE_SHIFT,
305 max_low_pfn);
306 /*
307 * Register fully available low RAM pages with the bootmem allocator.
308 */
309 {
310 unsigned long curr_pfn, last_pfn, pages;
311
312 /*
313 * We are rounding up the start address of usable memory:
314 */
315 curr_pfn = PFN_UP(__MEMORY_START);
316 /*
317 * ... and at the end of the usable range downwards:
318 */
319 last_pfn = PFN_DOWN(__pa(memory_end));
320
321 if (last_pfn > max_low_pfn)
322 last_pfn = max_low_pfn;
323
324 pages = last_pfn - curr_pfn;
325 free_bootmem_node(NODE_DATA(0), PFN_PHYS(curr_pfn),
326 PFN_PHYS(pages));
327 }
328
329 /*
330 * Reserve the kernel text and
331 * Reserve the bootmem bitmap. We do this in two steps (first step
332 * was init_bootmem()), because this catches the (definitely buggy)
333 * case of us accidentally initializing the bootmem allocator with
334 * an invalid RAM area.
335 */
336 reserve_bootmem_node(NODE_DATA(0), __MEMORY_START+PAGE_SIZE,
337 (PFN_PHYS(start_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);
338
339 /*
340 * reserve physical page 0 - it's a special BIOS page on many boxes,
341 * enabling clean reboots, SMP operation, laptop functions.
342 */
343 reserve_bootmem_node(NODE_DATA(0), __MEMORY_START, PAGE_SIZE);
344
345 #ifdef CONFIG_BLK_DEV_INITRD
346 ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
347 if (&__rd_start != &__rd_end) {
348 LOADER_TYPE = 1;
349 INITRD_START = PHYSADDR((unsigned long)&__rd_start) - __MEMORY_START;
350 INITRD_SIZE = (unsigned long)&__rd_end - (unsigned long)&__rd_start;
351 }
352
353 if (LOADER_TYPE && INITRD_START) {
354 if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
355 reserve_bootmem_node(NODE_DATA(0), INITRD_START+__MEMORY_START, INITRD_SIZE);
356 initrd_start =
357 INITRD_START ? INITRD_START + PAGE_OFFSET + __MEMORY_START : 0;
358 initrd_end = initrd_start + INITRD_SIZE;
359 } else {
360 printk("initrd extends beyond end of memory "
361 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
362 INITRD_START + INITRD_SIZE,
363 max_low_pfn << PAGE_SHIFT);
364 initrd_start = 0;
365 }
366 }
367 #endif
368
369 #ifdef CONFIG_DUMMY_CONSOLE
370 conswitchp = &dummy_con;
371 #endif
372
373 /* Perform the machine specific initialisation */
374 platform_setup();
375
376 paging_init();
377 }
378
379 struct sh_machine_vector* __init get_mv_byname(const char* name)
380 {
381 extern int strcasecmp(const char *, const char *);
382 extern long __machvec_start, __machvec_end;
383 struct sh_machine_vector *all_vecs =
384 (struct sh_machine_vector *)&__machvec_start;
385
386 int i, n = ((unsigned long)&__machvec_end
387 - (unsigned long)&__machvec_start)/
388 sizeof(struct sh_machine_vector);
389
390 for (i = 0; i < n; ++i) {
391 struct sh_machine_vector *mv = &all_vecs[i];
392 if (mv == NULL)
393 continue;
394 if (strcasecmp(name, get_system_type()) == 0) {
395 return mv;
396 }
397 }
398 return NULL;
399 }
400
401 static struct cpu cpu[NR_CPUS];
402
403 static int __init topology_init(void)
404 {
405 int cpu_id;
406
407 for (cpu_id = 0; cpu_id < NR_CPUS; cpu_id++)
408 if (cpu_possible(cpu_id))
409 register_cpu(&cpu[cpu_id], cpu_id, NULL);
410
411 return 0;
412 }
413
414 subsys_initcall(topology_init);
415
416 static const char *cpu_name[] = {
417 [CPU_SH7604] = "SH7604",
418 [CPU_SH7705] = "SH7705",
419 [CPU_SH7708] = "SH7708",
420 [CPU_SH7729] = "SH7729",
421 [CPU_SH7300] = "SH7300",
422 [CPU_SH7750] = "SH7750",
423 [CPU_SH7750S] = "SH7750S",
424 [CPU_SH7750R] = "SH7750R",
425 [CPU_SH7751] = "SH7751",
426 [CPU_SH7751R] = "SH7751R",
427 [CPU_SH7760] = "SH7760",
428 [CPU_SH73180] = "SH73180",
429 [CPU_ST40RA] = "ST40RA",
430 [CPU_ST40GX1] = "ST40GX1",
431 [CPU_SH4_202] = "SH4-202",
432 [CPU_SH4_501] = "SH4-501",
433 [CPU_SH7770] = "SH7770",
434 [CPU_SH7780] = "SH7780",
435 [CPU_SH7781] = "SH7781",
436 [CPU_SH_NONE] = "Unknown"
437 };
438
439 const char *get_cpu_subtype(void)
440 {
441 return cpu_name[boot_cpu_data.type];
442 }
443
444 #ifdef CONFIG_PROC_FS
445 static const char *cpu_flags[] = {
446 "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr", "ptea", NULL
447 };
448
449 static void show_cpuflags(struct seq_file *m)
450 {
451 unsigned long i;
452
453 seq_printf(m, "cpu flags\t:");
454
455 if (!cpu_data->flags) {
456 seq_printf(m, " %s\n", cpu_flags[0]);
457 return;
458 }
459
460 for (i = 0; cpu_flags[i]; i++)
461 if ((cpu_data->flags & (1 << i)))
462 seq_printf(m, " %s", cpu_flags[i+1]);
463
464 seq_printf(m, "\n");
465 }
466
467 static void show_cacheinfo(struct seq_file *m, const char *type, struct cache_info info)
468 {
469 unsigned int cache_size;
470
471 cache_size = info.ways * info.sets * info.linesz;
472
473 seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
474 type, cache_size >> 10, info.ways);
475 }
476
477 /*
478 * Get CPU information for use by the procfs.
479 */
480 static int show_cpuinfo(struct seq_file *m, void *v)
481 {
482 unsigned int cpu = smp_processor_id();
483
484 if (!cpu && cpu_online(cpu))
485 seq_printf(m, "machine\t\t: %s\n", get_system_type());
486
487 seq_printf(m, "processor\t: %d\n", cpu);
488 seq_printf(m, "cpu family\t: %s\n", system_utsname.machine);
489 seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype());
490
491 show_cpuflags(m);
492
493 seq_printf(m, "cache type\t: ");
494
495 /*
496 * Check for what type of cache we have, we support both the
497 * unified cache on the SH-2 and SH-3, as well as the harvard
498 * style cache on the SH-4.
499 */
500 if (test_bit(SH_CACHE_COMBINED, &(boot_cpu_data.icache.flags))) {
501 seq_printf(m, "unified\n");
502 show_cacheinfo(m, "cache", boot_cpu_data.icache);
503 } else {
504 seq_printf(m, "split (harvard)\n");
505 show_cacheinfo(m, "icache", boot_cpu_data.icache);
506 show_cacheinfo(m, "dcache", boot_cpu_data.dcache);
507 }
508
509 seq_printf(m, "bogomips\t: %lu.%02lu\n",
510 boot_cpu_data.loops_per_jiffy/(500000/HZ),
511 (boot_cpu_data.loops_per_jiffy/(5000/HZ)) % 100);
512
513 return show_clocks(m);
514 }
515
516 static void *c_start(struct seq_file *m, loff_t *pos)
517 {
518 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
519 }
520 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
521 {
522 ++*pos;
523 return c_start(m, pos);
524 }
525 static void c_stop(struct seq_file *m, void *v)
526 {
527 }
528 struct seq_operations cpuinfo_op = {
529 .start = c_start,
530 .next = c_next,
531 .stop = c_stop,
532 .show = show_cpuinfo,
533 };
534 #endif /* CONFIG_PROC_FS */
535
536 #ifdef CONFIG_SH_KGDB
537 /*
538 * Parse command-line kgdb options. By default KGDB is enabled,
539 * entered on error (or other action) using default serial info.
540 * The command-line option can include a serial port specification
541 * and an action to override default or configured behavior.
542 */
543 struct kgdb_sermap kgdb_sci_sermap =
544 { "ttySC", 5, kgdb_sci_setup, NULL };
545
546 struct kgdb_sermap *kgdb_serlist = &kgdb_sci_sermap;
547 struct kgdb_sermap *kgdb_porttype = &kgdb_sci_sermap;
548
549 void kgdb_register_sermap(struct kgdb_sermap *map)
550 {
551 struct kgdb_sermap *last;
552
553 for (last = kgdb_serlist; last->next; last = last->next)
554 ;
555 last->next = map;
556 if (!map->namelen) {
557 map->namelen = strlen(map->name);
558 }
559 }
560
561 static int __init kgdb_parse_options(char *options)
562 {
563 char c;
564 int baud;
565
566 /* Check for port spec (or use default) */
567
568 /* Determine port type and instance */
569 if (!memcmp(options, "tty", 3)) {
570 struct kgdb_sermap *map = kgdb_serlist;
571
572 while (map && memcmp(options, map->name, map->namelen))
573 map = map->next;
574
575 if (!map) {
576 KGDB_PRINTK("unknown port spec in %s\n", options);
577 return -1;
578 }
579
580 kgdb_porttype = map;
581 kgdb_serial_setup = map->setup_fn;
582 kgdb_portnum = options[map->namelen] - '0';
583 options += map->namelen + 1;
584
585 options = (*options == ',') ? options+1 : options;
586
587 /* Read optional parameters (baud/parity/bits) */
588 baud = simple_strtoul(options, &options, 10);
589 if (baud != 0) {
590 kgdb_baud = baud;
591
592 c = toupper(*options);
593 if (c == 'E' || c == 'O' || c == 'N') {
594 kgdb_parity = c;
595 options++;
596 }
597
598 c = *options;
599 if (c == '7' || c == '8') {
600 kgdb_bits = c;
601 options++;
602 }
603 options = (*options == ',') ? options+1 : options;
604 }
605 }
606
607 /* Check for action specification */
608 if (!memcmp(options, "halt", 4)) {
609 kgdb_halt = 1;
610 options += 4;
611 } else if (!memcmp(options, "disabled", 8)) {
612 kgdb_enabled = 0;
613 options += 8;
614 }
615
616 if (*options) {
617 KGDB_PRINTK("ignored unknown options: %s\n", options);
618 return 0;
619 }
620 return 1;
621 }
622 __setup("kgdb=", kgdb_parse_options);
623 #endif /* CONFIG_SH_KGDB */
624
kernel source for telekom puls (alcatel/mediatek)