Commit | Line | Data |
---|---|---|
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 | ||
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/io_generic.h> | |
26 | #include <asm/sections.h> | |
27 | #include <asm/irq.h> | |
28 | #include <asm/setup.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, 0, 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 | ||
65463b73 | 86 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 87 | #define RAMDISK_PROMPT_FLAG 0x8000 |
65463b73 | 88 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 LT |
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 | #if defined(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_GENERIC | |
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 | #ifdef CONFIG_SH_UNKNOWN | |
210 | sh_mv = mv_unknown; | |
211 | #endif | |
212 | ||
213 | /* | |
214 | * Manually walk the vec, fill in anything that the board hasn't yet | |
215 | * by hand, wrapping to the generic implementation. | |
216 | */ | |
217 | #define mv_set(elem) do { \ | |
218 | if (!sh_mv.mv_##elem) \ | |
219 | sh_mv.mv_##elem = generic_##elem; \ | |
220 | } while (0) | |
221 | ||
222 | mv_set(inb); mv_set(inw); mv_set(inl); | |
223 | mv_set(outb); mv_set(outw); mv_set(outl); | |
224 | ||
225 | mv_set(inb_p); mv_set(inw_p); mv_set(inl_p); | |
226 | mv_set(outb_p); mv_set(outw_p); mv_set(outl_p); | |
227 | ||
228 | mv_set(insb); mv_set(insw); mv_set(insl); | |
229 | mv_set(outsb); mv_set(outsw); mv_set(outsl); | |
230 | ||
231 | mv_set(readb); mv_set(readw); mv_set(readl); | |
232 | mv_set(writeb); mv_set(writew); mv_set(writel); | |
233 | ||
234 | mv_set(ioremap); | |
235 | mv_set(iounmap); | |
236 | ||
237 | mv_set(isa_port2addr); | |
238 | mv_set(irq_demux); | |
239 | ||
240 | #ifdef CONFIG_SH_UNKNOWN | |
241 | __set_io_port_base(mv_io_base); | |
242 | #endif | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | void __init setup_arch(char **cmdline_p) | |
248 | { | |
249 | unsigned long bootmap_size; | |
250 | unsigned long start_pfn, max_pfn, max_low_pfn; | |
251 | ||
252 | #ifdef CONFIG_EARLY_PRINTK | |
253 | extern void enable_early_printk(void); | |
254 | ||
255 | enable_early_printk(); | |
256 | #endif | |
257 | #ifdef CONFIG_CMDLINE_BOOL | |
258 | strcpy(COMMAND_LINE, CONFIG_CMDLINE); | |
259 | #endif | |
260 | ||
261 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); | |
262 | ||
263 | #ifdef CONFIG_BLK_DEV_RAM | |
264 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; | |
265 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); | |
266 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); | |
267 | #endif | |
268 | ||
269 | if (!MOUNT_ROOT_RDONLY) | |
270 | root_mountflags &= ~MS_RDONLY; | |
271 | init_mm.start_code = (unsigned long) _text; | |
272 | init_mm.end_code = (unsigned long) _etext; | |
273 | init_mm.end_data = (unsigned long) _edata; | |
274 | init_mm.brk = (unsigned long) _end; | |
275 | ||
276 | code_resource.start = virt_to_bus(_text); | |
277 | code_resource.end = virt_to_bus(_etext)-1; | |
278 | data_resource.start = virt_to_bus(_etext); | |
279 | data_resource.end = virt_to_bus(_edata)-1; | |
280 | ||
281 | sh_mv_setup(cmdline_p); | |
282 | ||
283 | #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) | |
284 | #define PFN_DOWN(x) ((x) >> PAGE_SHIFT) | |
285 | #define PFN_PHYS(x) ((x) << PAGE_SHIFT) | |
286 | ||
1da177e4 LT |
287 | /* |
288 | * Find the highest page frame number we have available | |
289 | */ | |
290 | max_pfn = PFN_DOWN(__pa(memory_end)); | |
291 | ||
292 | /* | |
293 | * Determine low and high memory ranges: | |
294 | */ | |
295 | max_low_pfn = max_pfn; | |
296 | ||
65463b73 | 297 | /* |
1da177e4 LT |
298 | * Partially used pages are not usable - thus |
299 | * we are rounding upwards: | |
65463b73 | 300 | */ |
1da177e4 LT |
301 | start_pfn = PFN_UP(__pa(_end)); |
302 | ||
303 | /* | |
304 | * Find a proper area for the bootmem bitmap. After this | |
305 | * bootstrap step all allocations (until the page allocator | |
306 | * is intact) must be done via bootmem_alloc(). | |
307 | */ | |
308 | bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn, | |
309 | __MEMORY_START>>PAGE_SHIFT, | |
310 | max_low_pfn); | |
311 | /* | |
312 | * Register fully available low RAM pages with the bootmem allocator. | |
313 | */ | |
314 | { | |
315 | unsigned long curr_pfn, last_pfn, pages; | |
316 | ||
317 | /* | |
318 | * We are rounding up the start address of usable memory: | |
319 | */ | |
320 | curr_pfn = PFN_UP(__MEMORY_START); | |
321 | /* | |
322 | * ... and at the end of the usable range downwards: | |
323 | */ | |
324 | last_pfn = PFN_DOWN(__pa(memory_end)); | |
325 | ||
326 | if (last_pfn > max_low_pfn) | |
327 | last_pfn = max_low_pfn; | |
328 | ||
329 | pages = last_pfn - curr_pfn; | |
330 | free_bootmem_node(NODE_DATA(0), PFN_PHYS(curr_pfn), | |
331 | PFN_PHYS(pages)); | |
332 | } | |
333 | ||
334 | /* | |
335 | * Reserve the kernel text and | |
336 | * Reserve the bootmem bitmap. We do this in two steps (first step | |
337 | * was init_bootmem()), because this catches the (definitely buggy) | |
338 | * case of us accidentally initializing the bootmem allocator with | |
339 | * an invalid RAM area. | |
340 | */ | |
341 | reserve_bootmem_node(NODE_DATA(0), __MEMORY_START+PAGE_SIZE, | |
342 | (PFN_PHYS(start_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START); | |
343 | ||
344 | /* | |
345 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
346 | * enabling clean reboots, SMP operation, laptop functions. | |
347 | */ | |
348 | reserve_bootmem_node(NODE_DATA(0), __MEMORY_START, PAGE_SIZE); | |
349 | ||
350 | #ifdef CONFIG_BLK_DEV_INITRD | |
65463b73 PM |
351 | ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0); |
352 | if (&__rd_start != &__rd_end) { | |
1da177e4 LT |
353 | LOADER_TYPE = 1; |
354 | INITRD_START = PHYSADDR((unsigned long)&__rd_start) - __MEMORY_START; | |
355 | INITRD_SIZE = (unsigned long)&__rd_end - (unsigned long)&__rd_start; | |
65463b73 | 356 | } |
1da177e4 LT |
357 | |
358 | if (LOADER_TYPE && INITRD_START) { | |
359 | if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) { | |
360 | reserve_bootmem_node(NODE_DATA(0), INITRD_START+__MEMORY_START, INITRD_SIZE); | |
361 | initrd_start = | |
362 | INITRD_START ? INITRD_START + PAGE_OFFSET + __MEMORY_START : 0; | |
363 | initrd_end = initrd_start + INITRD_SIZE; | |
364 | } else { | |
365 | printk("initrd extends beyond end of memory " | |
366 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
367 | INITRD_START + INITRD_SIZE, | |
368 | max_low_pfn << PAGE_SHIFT); | |
369 | initrd_start = 0; | |
370 | } | |
371 | } | |
372 | #endif | |
373 | ||
374 | #ifdef CONFIG_DUMMY_CONSOLE | |
375 | conswitchp = &dummy_con; | |
376 | #endif | |
377 | ||
378 | /* Perform the machine specific initialisation */ | |
379 | platform_setup(); | |
380 | ||
381 | paging_init(); | |
382 | } | |
383 | ||
384 | struct sh_machine_vector* __init get_mv_byname(const char* name) | |
385 | { | |
386 | extern int strcasecmp(const char *, const char *); | |
387 | extern long __machvec_start, __machvec_end; | |
388 | struct sh_machine_vector *all_vecs = | |
389 | (struct sh_machine_vector *)&__machvec_start; | |
390 | ||
391 | int i, n = ((unsigned long)&__machvec_end | |
392 | - (unsigned long)&__machvec_start)/ | |
393 | sizeof(struct sh_machine_vector); | |
394 | ||
395 | for (i = 0; i < n; ++i) { | |
396 | struct sh_machine_vector *mv = &all_vecs[i]; | |
397 | if (mv == NULL) | |
398 | continue; | |
399 | if (strcasecmp(name, get_system_type()) == 0) { | |
400 | return mv; | |
401 | } | |
402 | } | |
403 | return NULL; | |
404 | } | |
405 | ||
406 | static struct cpu cpu[NR_CPUS]; | |
407 | ||
408 | static int __init topology_init(void) | |
409 | { | |
410 | int cpu_id; | |
411 | ||
412 | for (cpu_id = 0; cpu_id < NR_CPUS; cpu_id++) | |
413 | if (cpu_possible(cpu_id)) | |
414 | register_cpu(&cpu[cpu_id], cpu_id, NULL); | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
419 | subsys_initcall(topology_init); | |
420 | ||
421 | static const char *cpu_name[] = { | |
422 | [CPU_SH7604] = "SH7604", | |
423 | [CPU_SH7705] = "SH7705", | |
424 | [CPU_SH7708] = "SH7708", | |
425 | [CPU_SH7729] = "SH7729", | |
426 | [CPU_SH7300] = "SH7300", | |
427 | [CPU_SH7750] = "SH7750", | |
428 | [CPU_SH7750S] = "SH7750S", | |
429 | [CPU_SH7750R] = "SH7750R", | |
430 | [CPU_SH7751] = "SH7751", | |
431 | [CPU_SH7751R] = "SH7751R", | |
432 | [CPU_SH7760] = "SH7760", | |
433 | [CPU_SH73180] = "SH73180", | |
434 | [CPU_ST40RA] = "ST40RA", | |
435 | [CPU_ST40GX1] = "ST40GX1", | |
436 | [CPU_SH4_202] = "SH4-202", | |
437 | [CPU_SH4_501] = "SH4-501", | |
438 | [CPU_SH_NONE] = "Unknown" | |
439 | }; | |
440 | ||
441 | const char *get_cpu_subtype(void) | |
442 | { | |
443 | return cpu_name[boot_cpu_data.type]; | |
444 | } | |
445 | ||
446 | #ifdef CONFIG_PROC_FS | |
447 | static const char *cpu_flags[] = { | |
448 | "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr", | |
449 | }; | |
450 | ||
451 | static void show_cpuflags(struct seq_file *m) | |
452 | { | |
453 | unsigned long i; | |
454 | ||
455 | seq_printf(m, "cpu flags\t:"); | |
456 | ||
457 | if (!cpu_data->flags) { | |
458 | seq_printf(m, " %s\n", cpu_flags[0]); | |
459 | return; | |
460 | } | |
461 | ||
462 | for (i = 0; i < cpu_data->flags; i++) | |
463 | if ((cpu_data->flags & (1 << i))) | |
464 | seq_printf(m, " %s", cpu_flags[i+1]); | |
465 | ||
466 | seq_printf(m, "\n"); | |
467 | } | |
468 | ||
469 | static void show_cacheinfo(struct seq_file *m, const char *type, struct cache_info info) | |
470 | { | |
471 | unsigned int cache_size; | |
472 | ||
473 | cache_size = info.ways * info.sets * info.linesz; | |
474 | ||
475 | seq_printf(m, "%s size\t: %dKiB\n", type, cache_size >> 10); | |
476 | } | |
477 | ||
478 | /* | |
479 | * Get CPU information for use by the procfs. | |
480 | */ | |
481 | static int show_cpuinfo(struct seq_file *m, void *v) | |
482 | { | |
483 | unsigned int cpu = smp_processor_id(); | |
484 | ||
485 | if (!cpu && cpu_online(cpu)) | |
486 | seq_printf(m, "machine\t\t: %s\n", get_system_type()); | |
487 | ||
488 | seq_printf(m, "processor\t: %d\n", cpu); | |
489 | seq_printf(m, "cpu family\t: %s\n", system_utsname.machine); | |
490 | seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype()); | |
491 | ||
492 | show_cpuflags(m); | |
493 | ||
494 | seq_printf(m, "cache type\t: "); | |
495 | ||
496 | /* | |
497 | * Check for what type of cache we have, we support both the | |
498 | * unified cache on the SH-2 and SH-3, as well as the harvard | |
499 | * style cache on the SH-4. | |
500 | */ | |
501 | if (test_bit(SH_CACHE_COMBINED, &(boot_cpu_data.icache.flags))) { | |
502 | seq_printf(m, "unified\n"); | |
503 | show_cacheinfo(m, "cache", boot_cpu_data.icache); | |
504 | } else { | |
505 | seq_printf(m, "split (harvard)\n"); | |
506 | show_cacheinfo(m, "icache", boot_cpu_data.icache); | |
507 | show_cacheinfo(m, "dcache", boot_cpu_data.dcache); | |
508 | } | |
509 | ||
510 | seq_printf(m, "bogomips\t: %lu.%02lu\n", | |
511 | boot_cpu_data.loops_per_jiffy/(500000/HZ), | |
512 | (boot_cpu_data.loops_per_jiffy/(5000/HZ)) % 100); | |
513 | ||
514 | #define PRINT_CLOCK(name, value) \ | |
515 | seq_printf(m, name " clock\t: %d.%02dMHz\n", \ | |
516 | ((value) / 1000000), ((value) % 1000000)/10000) | |
517 | ||
518 | PRINT_CLOCK("cpu", boot_cpu_data.cpu_clock); | |
519 | PRINT_CLOCK("bus", boot_cpu_data.bus_clock); | |
520 | #ifdef CONFIG_CPU_SUBTYPE_ST40STB1 | |
521 | PRINT_CLOCK("memory", boot_cpu_data.memory_clock); | |
522 | #endif | |
523 | PRINT_CLOCK("module", boot_cpu_data.module_clock); | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
528 | ||
529 | static void *c_start(struct seq_file *m, loff_t *pos) | |
530 | { | |
531 | return *pos < NR_CPUS ? cpu_data + *pos : NULL; | |
532 | } | |
533 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
534 | { | |
535 | ++*pos; | |
536 | return c_start(m, pos); | |
537 | } | |
538 | static void c_stop(struct seq_file *m, void *v) | |
539 | { | |
540 | } | |
541 | struct seq_operations cpuinfo_op = { | |
542 | .start = c_start, | |
543 | .next = c_next, | |
544 | .stop = c_stop, | |
545 | .show = show_cpuinfo, | |
546 | }; | |
547 | #endif /* CONFIG_PROC_FS */ | |
548 | ||
549 | #ifdef CONFIG_SH_KGDB | |
550 | /* | |
551 | * Parse command-line kgdb options. By default KGDB is enabled, | |
552 | * entered on error (or other action) using default serial info. | |
553 | * The command-line option can include a serial port specification | |
554 | * and an action to override default or configured behavior. | |
555 | */ | |
556 | struct kgdb_sermap kgdb_sci_sermap = | |
557 | { "ttySC", 5, kgdb_sci_setup, NULL }; | |
558 | ||
559 | struct kgdb_sermap *kgdb_serlist = &kgdb_sci_sermap; | |
560 | struct kgdb_sermap *kgdb_porttype = &kgdb_sci_sermap; | |
561 | ||
562 | void kgdb_register_sermap(struct kgdb_sermap *map) | |
563 | { | |
564 | struct kgdb_sermap *last; | |
565 | ||
566 | for (last = kgdb_serlist; last->next; last = last->next) | |
567 | ; | |
568 | last->next = map; | |
569 | if (!map->namelen) { | |
570 | map->namelen = strlen(map->name); | |
571 | } | |
572 | } | |
573 | ||
574 | static int __init kgdb_parse_options(char *options) | |
575 | { | |
576 | char c; | |
577 | int baud; | |
578 | ||
579 | /* Check for port spec (or use default) */ | |
580 | ||
581 | /* Determine port type and instance */ | |
582 | if (!memcmp(options, "tty", 3)) { | |
583 | struct kgdb_sermap *map = kgdb_serlist; | |
584 | ||
585 | while (map && memcmp(options, map->name, map->namelen)) | |
586 | map = map->next; | |
587 | ||
588 | if (!map) { | |
589 | KGDB_PRINTK("unknown port spec in %s\n", options); | |
590 | return -1; | |
591 | } | |
592 | ||
593 | kgdb_porttype = map; | |
594 | kgdb_serial_setup = map->setup_fn; | |
595 | kgdb_portnum = options[map->namelen] - '0'; | |
596 | options += map->namelen + 1; | |
597 | ||
598 | options = (*options == ',') ? options+1 : options; | |
599 | ||
600 | /* Read optional parameters (baud/parity/bits) */ | |
601 | baud = simple_strtoul(options, &options, 10); | |
602 | if (baud != 0) { | |
603 | kgdb_baud = baud; | |
604 | ||
605 | c = toupper(*options); | |
606 | if (c == 'E' || c == 'O' || c == 'N') { | |
607 | kgdb_parity = c; | |
608 | options++; | |
609 | } | |
610 | ||
611 | c = *options; | |
612 | if (c == '7' || c == '8') { | |
613 | kgdb_bits = c; | |
614 | options++; | |
615 | } | |
616 | options = (*options == ',') ? options+1 : options; | |
617 | } | |
618 | } | |
619 | ||
620 | /* Check for action specification */ | |
621 | if (!memcmp(options, "halt", 4)) { | |
622 | kgdb_halt = 1; | |
623 | options += 4; | |
624 | } else if (!memcmp(options, "disabled", 8)) { | |
625 | kgdb_enabled = 0; | |
626 | options += 8; | |
627 | } | |
628 | ||
629 | if (*options) { | |
630 | KGDB_PRINTK("ignored unknown options: %s\n", options); | |
631 | return 0; | |
632 | } | |
633 | return 1; | |
634 | } | |
635 | __setup("kgdb=", kgdb_parse_options); | |
636 | #endif /* CONFIG_SH_KGDB */ | |
637 |