Commit | Line | Data |
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1da177e4 LT |
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 | ||
894673ee | 13 | #include <linux/screen_info.h> |
1da177e4 LT |
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> | |
22a9835c | 23 | #include <linux/pfn.h> |
1da177e4 LT |
24 | #include <asm/uaccess.h> |
25 | #include <asm/io.h> | |
1da177e4 LT |
26 | #include <asm/sections.h> |
27 | #include <asm/irq.h> | |
28 | #include <asm/setup.h> | |
de02797a | 29 | #include <asm/clock.h> |
1da177e4 LT |
30 | |
31 | #ifdef CONFIG_SH_KGDB | |
32 | #include <asm/kgdb.h> | |
33 | static int kgdb_parse_options(char *options); | |
34 | #endif | |
35 | extern void * __rd_start, * __rd_end; | |
36 | /* | |
37 | * Machine setup.. | |
38 | */ | |
39 | ||
40 | /* | |
41 | * Initialize loops_per_jiffy as 10000000 (1000MIPS). | |
42 | * This value will be used at the very early stage of serial setup. | |
43 | * The bigger value means no problem. | |
44 | */ | |
de02797a | 45 | struct sh_cpuinfo boot_cpu_data = { CPU_SH_NONE, 10000000, }; |
1da177e4 LT |
46 | struct screen_info screen_info; |
47 | ||
48 | #if defined(CONFIG_SH_UNKNOWN) | |
49 | struct sh_machine_vector sh_mv; | |
50 | #endif | |
51 | ||
52 | /* We need this to satisfy some external references. */ | |
53 | struct screen_info screen_info = { | |
54 | 0, 25, /* orig-x, orig-y */ | |
55 | 0, /* unused */ | |
56 | 0, /* orig-video-page */ | |
57 | 0, /* orig-video-mode */ | |
58 | 80, /* orig-video-cols */ | |
59 | 0,0,0, /* ega_ax, ega_bx, ega_cx */ | |
60 | 25, /* orig-video-lines */ | |
61 | 0, /* orig-video-isVGA */ | |
62 | 16 /* orig-video-points */ | |
63 | }; | |
64 | ||
65 | extern void platform_setup(void); | |
66 | extern char *get_system_type(void); | |
67 | extern int root_mountflags; | |
68 | ||
69 | #define MV_NAME_SIZE 32 | |
70 | ||
71 | static struct sh_machine_vector* __init get_mv_byname(const char* name); | |
72 | ||
73 | /* | |
74 | * This is set up by the setup-routine at boot-time | |
75 | */ | |
76 | #define PARAM ((unsigned char *)empty_zero_page) | |
77 | ||
78 | #define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000)) | |
79 | #define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004)) | |
80 | #define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008)) | |
81 | #define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c)) | |
82 | #define INITRD_START (*(unsigned long *) (PARAM+0x010)) | |
83 | #define INITRD_SIZE (*(unsigned long *) (PARAM+0x014)) | |
84 | /* ... */ | |
85 | #define COMMAND_LINE ((char *) (PARAM+0x100)) | |
86 | ||
65463b73 | 87 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 88 | #define RAMDISK_PROMPT_FLAG 0x8000 |
65463b73 | 89 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 LT |
90 | |
91 | static char command_line[COMMAND_LINE_SIZE] = { 0, }; | |
92 | ||
93 | struct resource standard_io_resources[] = { | |
94 | { "dma1", 0x00, 0x1f }, | |
95 | { "pic1", 0x20, 0x3f }, | |
96 | { "timer", 0x40, 0x5f }, | |
97 | { "keyboard", 0x60, 0x6f }, | |
98 | { "dma page reg", 0x80, 0x8f }, | |
99 | { "pic2", 0xa0, 0xbf }, | |
100 | { "dma2", 0xc0, 0xdf }, | |
101 | { "fpu", 0xf0, 0xff } | |
102 | }; | |
103 | ||
104 | #define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource)) | |
105 | ||
106 | /* System RAM - interrupted by the 640kB-1M hole */ | |
107 | #define code_resource (ram_resources[3]) | |
108 | #define data_resource (ram_resources[4]) | |
109 | static struct resource ram_resources[] = { | |
110 | { "System RAM", 0x000000, 0x09ffff, IORESOURCE_BUSY }, | |
111 | { "System RAM", 0x100000, 0x100000, IORESOURCE_BUSY }, | |
112 | { "Video RAM area", 0x0a0000, 0x0bffff }, | |
113 | { "Kernel code", 0x100000, 0 }, | |
114 | { "Kernel data", 0, 0 } | |
115 | }; | |
116 | ||
117 | unsigned long memory_start, memory_end; | |
118 | ||
119 | static inline void parse_cmdline (char ** cmdline_p, char mv_name[MV_NAME_SIZE], | |
120 | struct sh_machine_vector** mvp, | |
121 | unsigned long *mv_io_base, | |
122 | int *mv_mmio_enable) | |
123 | { | |
124 | char c = ' ', *to = command_line, *from = COMMAND_LINE; | |
125 | int len = 0; | |
126 | ||
127 | /* Save unparsed command line copy for /proc/cmdline */ | |
128 | memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); | |
129 | saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; | |
130 | ||
131 | memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START; | |
132 | memory_end = memory_start + __MEMORY_SIZE; | |
133 | ||
134 | for (;;) { | |
135 | /* | |
136 | * "mem=XXX[kKmM]" defines a size of memory. | |
137 | */ | |
138 | if (c == ' ' && !memcmp(from, "mem=", 4)) { | |
139 | if (to != command_line) | |
140 | to--; | |
141 | { | |
142 | unsigned long mem_size; | |
143 | ||
144 | mem_size = memparse(from+4, &from); | |
145 | memory_end = memory_start + mem_size; | |
146 | } | |
147 | } | |
a80fd21e PM |
148 | |
149 | #ifdef CONFIG_EARLY_PRINTK | |
150 | if (c == ' ' && !memcmp(from, "earlyprintk=", 12)) { | |
151 | char *ep_end; | |
152 | ||
153 | if (to != command_line) | |
154 | to--; | |
155 | ||
156 | from += 12; | |
157 | ep_end = strchr(from, ' '); | |
158 | ||
159 | setup_early_printk(from); | |
160 | printk("early console enabled\n"); | |
161 | ||
162 | from = ep_end; | |
163 | } | |
164 | #endif | |
165 | ||
1da177e4 LT |
166 | if (c == ' ' && !memcmp(from, "sh_mv=", 6)) { |
167 | char* mv_end; | |
168 | char* mv_comma; | |
169 | int mv_len; | |
170 | if (to != command_line) | |
171 | to--; | |
172 | from += 6; | |
173 | mv_end = strchr(from, ' '); | |
174 | if (mv_end == NULL) | |
175 | mv_end = from + strlen(from); | |
176 | ||
177 | mv_comma = strchr(from, ','); | |
178 | if ((mv_comma != NULL) && (mv_comma < mv_end)) { | |
179 | int ints[3]; | |
180 | get_options(mv_comma+1, ARRAY_SIZE(ints), ints); | |
181 | *mv_io_base = ints[1]; | |
182 | *mv_mmio_enable = ints[2]; | |
183 | mv_len = mv_comma - from; | |
184 | } else { | |
185 | mv_len = mv_end - from; | |
186 | } | |
187 | if (mv_len > (MV_NAME_SIZE-1)) | |
188 | mv_len = MV_NAME_SIZE-1; | |
189 | memcpy(mv_name, from, mv_len); | |
190 | mv_name[mv_len] = '\0'; | |
191 | from = mv_end; | |
192 | ||
193 | *mvp = get_mv_byname(mv_name); | |
194 | } | |
195 | c = *(from++); | |
196 | if (!c) | |
197 | break; | |
198 | if (COMMAND_LINE_SIZE <= ++len) | |
199 | break; | |
200 | *(to++) = c; | |
201 | } | |
202 | *to = '\0'; | |
203 | *cmdline_p = command_line; | |
204 | } | |
205 | ||
206 | static int __init sh_mv_setup(char **cmdline_p) | |
207 | { | |
50373c1b | 208 | #ifdef CONFIG_SH_UNKNOWN |
1da177e4 LT |
209 | extern struct sh_machine_vector mv_unknown; |
210 | #endif | |
211 | struct sh_machine_vector *mv = NULL; | |
212 | char mv_name[MV_NAME_SIZE] = ""; | |
213 | unsigned long mv_io_base = 0; | |
214 | int mv_mmio_enable = 0; | |
215 | ||
216 | parse_cmdline(cmdline_p, mv_name, &mv, &mv_io_base, &mv_mmio_enable); | |
217 | ||
50373c1b | 218 | #ifdef CONFIG_SH_UNKNOWN |
1da177e4 LT |
219 | if (mv == NULL) { |
220 | mv = &mv_unknown; | |
221 | if (*mv_name != '\0') { | |
222 | printk("Warning: Unsupported machine %s, using unknown\n", | |
223 | mv_name); | |
224 | } | |
225 | } | |
226 | sh_mv = *mv; | |
227 | #endif | |
1da177e4 LT |
228 | |
229 | /* | |
230 | * Manually walk the vec, fill in anything that the board hasn't yet | |
231 | * by hand, wrapping to the generic implementation. | |
232 | */ | |
233 | #define mv_set(elem) do { \ | |
234 | if (!sh_mv.mv_##elem) \ | |
235 | sh_mv.mv_##elem = generic_##elem; \ | |
236 | } while (0) | |
237 | ||
238 | mv_set(inb); mv_set(inw); mv_set(inl); | |
239 | mv_set(outb); mv_set(outw); mv_set(outl); | |
240 | ||
241 | mv_set(inb_p); mv_set(inw_p); mv_set(inl_p); | |
242 | mv_set(outb_p); mv_set(outw_p); mv_set(outl_p); | |
243 | ||
244 | mv_set(insb); mv_set(insw); mv_set(insl); | |
245 | mv_set(outsb); mv_set(outsw); mv_set(outsl); | |
246 | ||
247 | mv_set(readb); mv_set(readw); mv_set(readl); | |
248 | mv_set(writeb); mv_set(writew); mv_set(writel); | |
249 | ||
50373c1b PM |
250 | mv_set(ioport_map); |
251 | mv_set(ioport_unmap); | |
1da177e4 LT |
252 | mv_set(irq_demux); |
253 | ||
254 | #ifdef CONFIG_SH_UNKNOWN | |
255 | __set_io_port_base(mv_io_base); | |
256 | #endif | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
261 | void __init setup_arch(char **cmdline_p) | |
262 | { | |
263 | unsigned long bootmap_size; | |
264 | unsigned long start_pfn, max_pfn, max_low_pfn; | |
265 | ||
1da177e4 | 266 | |
1da177e4 LT |
267 | #ifdef CONFIG_CMDLINE_BOOL |
268 | strcpy(COMMAND_LINE, CONFIG_CMDLINE); | |
269 | #endif | |
270 | ||
271 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); | |
272 | ||
273 | #ifdef CONFIG_BLK_DEV_RAM | |
274 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; | |
275 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); | |
276 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); | |
277 | #endif | |
278 | ||
279 | if (!MOUNT_ROOT_RDONLY) | |
280 | root_mountflags &= ~MS_RDONLY; | |
281 | init_mm.start_code = (unsigned long) _text; | |
282 | init_mm.end_code = (unsigned long) _etext; | |
283 | init_mm.end_data = (unsigned long) _edata; | |
284 | init_mm.brk = (unsigned long) _end; | |
285 | ||
de02797a PM |
286 | code_resource.start = (unsigned long)virt_to_phys(_text); |
287 | code_resource.end = (unsigned long)virt_to_phys(_etext)-1; | |
288 | data_resource.start = (unsigned long)virt_to_phys(_etext); | |
289 | data_resource.end = (unsigned long)virt_to_phys(_edata)-1; | |
1da177e4 LT |
290 | |
291 | sh_mv_setup(cmdline_p); | |
292 | ||
1da177e4 LT |
293 | /* |
294 | * Find the highest page frame number we have available | |
295 | */ | |
296 | max_pfn = PFN_DOWN(__pa(memory_end)); | |
297 | ||
298 | /* | |
299 | * Determine low and high memory ranges: | |
300 | */ | |
301 | max_low_pfn = max_pfn; | |
302 | ||
65463b73 | 303 | /* |
1da177e4 LT |
304 | * Partially used pages are not usable - thus |
305 | * we are rounding upwards: | |
65463b73 | 306 | */ |
1da177e4 LT |
307 | start_pfn = PFN_UP(__pa(_end)); |
308 | ||
309 | /* | |
310 | * Find a proper area for the bootmem bitmap. After this | |
311 | * bootstrap step all allocations (until the page allocator | |
312 | * is intact) must be done via bootmem_alloc(). | |
313 | */ | |
314 | bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn, | |
315 | __MEMORY_START>>PAGE_SHIFT, | |
316 | max_low_pfn); | |
317 | /* | |
318 | * Register fully available low RAM pages with the bootmem allocator. | |
319 | */ | |
320 | { | |
321 | unsigned long curr_pfn, last_pfn, pages; | |
322 | ||
323 | /* | |
324 | * We are rounding up the start address of usable memory: | |
325 | */ | |
326 | curr_pfn = PFN_UP(__MEMORY_START); | |
327 | /* | |
328 | * ... and at the end of the usable range downwards: | |
329 | */ | |
330 | last_pfn = PFN_DOWN(__pa(memory_end)); | |
331 | ||
332 | if (last_pfn > max_low_pfn) | |
333 | last_pfn = max_low_pfn; | |
334 | ||
335 | pages = last_pfn - curr_pfn; | |
336 | free_bootmem_node(NODE_DATA(0), PFN_PHYS(curr_pfn), | |
337 | PFN_PHYS(pages)); | |
338 | } | |
339 | ||
340 | /* | |
341 | * Reserve the kernel text and | |
342 | * Reserve the bootmem bitmap. We do this in two steps (first step | |
343 | * was init_bootmem()), because this catches the (definitely buggy) | |
344 | * case of us accidentally initializing the bootmem allocator with | |
345 | * an invalid RAM area. | |
346 | */ | |
347 | reserve_bootmem_node(NODE_DATA(0), __MEMORY_START+PAGE_SIZE, | |
348 | (PFN_PHYS(start_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START); | |
349 | ||
350 | /* | |
351 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
352 | * enabling clean reboots, SMP operation, laptop functions. | |
353 | */ | |
354 | reserve_bootmem_node(NODE_DATA(0), __MEMORY_START, PAGE_SIZE); | |
355 | ||
356 | #ifdef CONFIG_BLK_DEV_INITRD | |
65463b73 PM |
357 | ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0); |
358 | if (&__rd_start != &__rd_end) { | |
1da177e4 LT |
359 | LOADER_TYPE = 1; |
360 | INITRD_START = PHYSADDR((unsigned long)&__rd_start) - __MEMORY_START; | |
361 | INITRD_SIZE = (unsigned long)&__rd_end - (unsigned long)&__rd_start; | |
65463b73 | 362 | } |
1da177e4 LT |
363 | |
364 | if (LOADER_TYPE && INITRD_START) { | |
365 | if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) { | |
366 | reserve_bootmem_node(NODE_DATA(0), INITRD_START+__MEMORY_START, INITRD_SIZE); | |
367 | initrd_start = | |
368 | INITRD_START ? INITRD_START + PAGE_OFFSET + __MEMORY_START : 0; | |
369 | initrd_end = initrd_start + INITRD_SIZE; | |
370 | } else { | |
371 | printk("initrd extends beyond end of memory " | |
372 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
373 | INITRD_START + INITRD_SIZE, | |
374 | max_low_pfn << PAGE_SHIFT); | |
375 | initrd_start = 0; | |
376 | } | |
377 | } | |
378 | #endif | |
379 | ||
380 | #ifdef CONFIG_DUMMY_CONSOLE | |
381 | conswitchp = &dummy_con; | |
382 | #endif | |
383 | ||
384 | /* Perform the machine specific initialisation */ | |
385 | platform_setup(); | |
386 | ||
387 | paging_init(); | |
388 | } | |
389 | ||
390 | struct sh_machine_vector* __init get_mv_byname(const char* name) | |
391 | { | |
392 | extern int strcasecmp(const char *, const char *); | |
393 | extern long __machvec_start, __machvec_end; | |
394 | struct sh_machine_vector *all_vecs = | |
395 | (struct sh_machine_vector *)&__machvec_start; | |
396 | ||
397 | int i, n = ((unsigned long)&__machvec_end | |
398 | - (unsigned long)&__machvec_start)/ | |
399 | sizeof(struct sh_machine_vector); | |
400 | ||
401 | for (i = 0; i < n; ++i) { | |
402 | struct sh_machine_vector *mv = &all_vecs[i]; | |
403 | if (mv == NULL) | |
404 | continue; | |
405 | if (strcasecmp(name, get_system_type()) == 0) { | |
406 | return mv; | |
407 | } | |
408 | } | |
409 | return NULL; | |
410 | } | |
411 | ||
412 | static struct cpu cpu[NR_CPUS]; | |
413 | ||
414 | static int __init topology_init(void) | |
415 | { | |
416 | int cpu_id; | |
417 | ||
bc83db4f | 418 | for_each_possible_cpu(cpu_id) |
76b67ed9 | 419 | register_cpu(&cpu[cpu_id], cpu_id); |
1da177e4 LT |
420 | |
421 | return 0; | |
422 | } | |
423 | ||
424 | subsys_initcall(topology_init); | |
425 | ||
426 | static const char *cpu_name[] = { | |
427 | [CPU_SH7604] = "SH7604", | |
428 | [CPU_SH7705] = "SH7705", | |
429 | [CPU_SH7708] = "SH7708", | |
430 | [CPU_SH7729] = "SH7729", | |
431 | [CPU_SH7300] = "SH7300", | |
432 | [CPU_SH7750] = "SH7750", | |
433 | [CPU_SH7750S] = "SH7750S", | |
434 | [CPU_SH7750R] = "SH7750R", | |
435 | [CPU_SH7751] = "SH7751", | |
436 | [CPU_SH7751R] = "SH7751R", | |
437 | [CPU_SH7760] = "SH7760", | |
438 | [CPU_SH73180] = "SH73180", | |
439 | [CPU_ST40RA] = "ST40RA", | |
440 | [CPU_ST40GX1] = "ST40GX1", | |
441 | [CPU_SH4_202] = "SH4-202", | |
442 | [CPU_SH4_501] = "SH4-501", | |
de02797a PM |
443 | [CPU_SH7770] = "SH7770", |
444 | [CPU_SH7780] = "SH7780", | |
445 | [CPU_SH7781] = "SH7781", | |
1da177e4 LT |
446 | [CPU_SH_NONE] = "Unknown" |
447 | }; | |
448 | ||
449 | const char *get_cpu_subtype(void) | |
450 | { | |
451 | return cpu_name[boot_cpu_data.type]; | |
452 | } | |
453 | ||
454 | #ifdef CONFIG_PROC_FS | |
455 | static const char *cpu_flags[] = { | |
de02797a | 456 | "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr", "ptea", NULL |
1da177e4 LT |
457 | }; |
458 | ||
459 | static void show_cpuflags(struct seq_file *m) | |
460 | { | |
461 | unsigned long i; | |
462 | ||
463 | seq_printf(m, "cpu flags\t:"); | |
464 | ||
465 | if (!cpu_data->flags) { | |
466 | seq_printf(m, " %s\n", cpu_flags[0]); | |
467 | return; | |
468 | } | |
469 | ||
de02797a | 470 | for (i = 0; cpu_flags[i]; i++) |
1da177e4 LT |
471 | if ((cpu_data->flags & (1 << i))) |
472 | seq_printf(m, " %s", cpu_flags[i+1]); | |
473 | ||
474 | seq_printf(m, "\n"); | |
475 | } | |
476 | ||
477 | static void show_cacheinfo(struct seq_file *m, const char *type, struct cache_info info) | |
478 | { | |
479 | unsigned int cache_size; | |
480 | ||
481 | cache_size = info.ways * info.sets * info.linesz; | |
482 | ||
de02797a PM |
483 | seq_printf(m, "%s size\t: %2dKiB (%d-way)\n", |
484 | type, cache_size >> 10, info.ways); | |
1da177e4 LT |
485 | } |
486 | ||
487 | /* | |
488 | * Get CPU information for use by the procfs. | |
489 | */ | |
490 | static int show_cpuinfo(struct seq_file *m, void *v) | |
491 | { | |
492 | unsigned int cpu = smp_processor_id(); | |
493 | ||
494 | if (!cpu && cpu_online(cpu)) | |
495 | seq_printf(m, "machine\t\t: %s\n", get_system_type()); | |
496 | ||
497 | seq_printf(m, "processor\t: %d\n", cpu); | |
498 | seq_printf(m, "cpu family\t: %s\n", system_utsname.machine); | |
499 | seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype()); | |
500 | ||
501 | show_cpuflags(m); | |
502 | ||
503 | seq_printf(m, "cache type\t: "); | |
504 | ||
505 | /* | |
506 | * Check for what type of cache we have, we support both the | |
507 | * unified cache on the SH-2 and SH-3, as well as the harvard | |
508 | * style cache on the SH-4. | |
509 | */ | |
0f08f338 | 510 | if (boot_cpu_data.icache.flags & SH_CACHE_COMBINED) { |
1da177e4 LT |
511 | seq_printf(m, "unified\n"); |
512 | show_cacheinfo(m, "cache", boot_cpu_data.icache); | |
513 | } else { | |
514 | seq_printf(m, "split (harvard)\n"); | |
515 | show_cacheinfo(m, "icache", boot_cpu_data.icache); | |
516 | show_cacheinfo(m, "dcache", boot_cpu_data.dcache); | |
517 | } | |
518 | ||
519 | seq_printf(m, "bogomips\t: %lu.%02lu\n", | |
520 | boot_cpu_data.loops_per_jiffy/(500000/HZ), | |
521 | (boot_cpu_data.loops_per_jiffy/(5000/HZ)) % 100); | |
522 | ||
de02797a | 523 | return show_clocks(m); |
1da177e4 LT |
524 | } |
525 | ||
1da177e4 LT |
526 | static void *c_start(struct seq_file *m, loff_t *pos) |
527 | { | |
528 | return *pos < NR_CPUS ? cpu_data + *pos : NULL; | |
529 | } | |
530 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
531 | { | |
532 | ++*pos; | |
533 | return c_start(m, pos); | |
534 | } | |
535 | static void c_stop(struct seq_file *m, void *v) | |
536 | { | |
537 | } | |
538 | struct seq_operations cpuinfo_op = { | |
539 | .start = c_start, | |
540 | .next = c_next, | |
541 | .stop = c_stop, | |
542 | .show = show_cpuinfo, | |
543 | }; | |
544 | #endif /* CONFIG_PROC_FS */ | |
545 | ||
546 | #ifdef CONFIG_SH_KGDB | |
547 | /* | |
548 | * Parse command-line kgdb options. By default KGDB is enabled, | |
549 | * entered on error (or other action) using default serial info. | |
550 | * The command-line option can include a serial port specification | |
551 | * and an action to override default or configured behavior. | |
552 | */ | |
553 | struct kgdb_sermap kgdb_sci_sermap = | |
554 | { "ttySC", 5, kgdb_sci_setup, NULL }; | |
555 | ||
556 | struct kgdb_sermap *kgdb_serlist = &kgdb_sci_sermap; | |
557 | struct kgdb_sermap *kgdb_porttype = &kgdb_sci_sermap; | |
558 | ||
559 | void kgdb_register_sermap(struct kgdb_sermap *map) | |
560 | { | |
561 | struct kgdb_sermap *last; | |
562 | ||
563 | for (last = kgdb_serlist; last->next; last = last->next) | |
564 | ; | |
565 | last->next = map; | |
566 | if (!map->namelen) { | |
567 | map->namelen = strlen(map->name); | |
568 | } | |
569 | } | |
570 | ||
571 | static int __init kgdb_parse_options(char *options) | |
572 | { | |
573 | char c; | |
574 | int baud; | |
575 | ||
576 | /* Check for port spec (or use default) */ | |
577 | ||
578 | /* Determine port type and instance */ | |
579 | if (!memcmp(options, "tty", 3)) { | |
580 | struct kgdb_sermap *map = kgdb_serlist; | |
581 | ||
582 | while (map && memcmp(options, map->name, map->namelen)) | |
583 | map = map->next; | |
584 | ||
585 | if (!map) { | |
586 | KGDB_PRINTK("unknown port spec in %s\n", options); | |
587 | return -1; | |
588 | } | |
589 | ||
590 | kgdb_porttype = map; | |
591 | kgdb_serial_setup = map->setup_fn; | |
592 | kgdb_portnum = options[map->namelen] - '0'; | |
593 | options += map->namelen + 1; | |
594 | ||
595 | options = (*options == ',') ? options+1 : options; | |
de02797a | 596 | |
1da177e4 LT |
597 | /* Read optional parameters (baud/parity/bits) */ |
598 | baud = simple_strtoul(options, &options, 10); | |
599 | if (baud != 0) { | |
600 | kgdb_baud = baud; | |
601 | ||
602 | c = toupper(*options); | |
603 | if (c == 'E' || c == 'O' || c == 'N') { | |
604 | kgdb_parity = c; | |
605 | options++; | |
606 | } | |
607 | ||
608 | c = *options; | |
609 | if (c == '7' || c == '8') { | |
610 | kgdb_bits = c; | |
611 | options++; | |
612 | } | |
613 | options = (*options == ',') ? options+1 : options; | |
614 | } | |
615 | } | |
616 | ||
617 | /* Check for action specification */ | |
618 | if (!memcmp(options, "halt", 4)) { | |
619 | kgdb_halt = 1; | |
620 | options += 4; | |
621 | } else if (!memcmp(options, "disabled", 8)) { | |
622 | kgdb_enabled = 0; | |
623 | options += 8; | |
624 | } | |
625 | ||
626 | if (*options) { | |
627 | KGDB_PRINTK("ignored unknown options: %s\n", options); | |
628 | return 0; | |
629 | } | |
630 | return 1; | |
631 | } | |
632 | __setup("kgdb=", kgdb_parse_options); | |
633 | #endif /* CONFIG_SH_KGDB */ | |
634 |