1 /* $Id: setup.c,v 1.1.1.1.2.7 2003/06/20 13:13:25 trent Exp $
2 *
3 * linux/arch/sh/kernel/setup.c
4 *
5 * Copyright (C) 1999 Niibe Yutaka
6 *
7 */
8
9 /*
10 * This file handles the architecture-dependent parts of initialization
11 */
12
13 #include <linux/errno.h>
14 #include <linux/sched.h>
15 #include <linux/kernel.h>
16 #include <linux/mm.h>
17 #include <linux/stddef.h>
18 #include <linux/unistd.h>
19 #include <linux/ptrace.h>
20 #include <linux/slab.h>
21 #include <linux/user.h>
22 #include <linux/a.out.h>
23 #include <linux/tty.h>
24 #include <linux/ioport.h>
25 #include <linux/delay.h>
26 #include <linux/config.h>
27 #include <linux/init.h>
28 #ifdef CONFIG_BLK_DEV_RAM
29 #include <linux/blk.h>
30 #endif
31 #include <linux/bootmem.h>
32 #include <linux/console.h>
33 #include <linux/ctype.h>
34 #include <linux/seq_file.h>
35 #include <asm/processor.h>
36 #include <asm/page.h>
37 #include <asm/pgtable.h>
38 #include <asm/uaccess.h>
39 #include <asm/system.h>
40 #include <asm/io.h>
41 #include <asm/io_generic.h>
42 #include <asm/machvec.h>
43 #ifdef CONFIG_SH_EARLY_PRINTK
44 #include <asm/sh_bios.h>
45 #endif
46
47 #ifdef CONFIG_SH_KGDB
48 #include <asm/kgdb.h>
49 static int kgdb_parse_options(char *options);
50 #endif
51
52 /*
53 * Machine setup..
54 */
55
56 /*
57 * Initialize loops_per_jiffy as 10000000 (1000MIPS).
58 * This value will be used at the very early stage of serial setup.
59 * The bigger value means no problem.
60 */
61 struct sh_cpuinfo boot_cpu_data = { CPU_SH_NONE, 0, 10000000, };
62 struct screen_info screen_info;
63 unsigned char aux_device_present = 0xaa;
64
65 #if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_UNKNOWN)
66 struct sh_machine_vector sh_mv;
67 #endif
68
69 /* We need this to satisfy some external references. */
70 struct screen_info screen_info = {
71 0, 25, /* orig-x, orig-y */
72 0, /* unused */
73 0, /* orig-video-page */
74 0, /* orig-video-mode */
75 80, /* orig-video-cols */
76 0,0,0, /* ega_ax, ega_bx, ega_cx */
77 25, /* orig-video-lines */
78 0, /* orig-video-isVGA */
79 16 /* orig-video-points */
80 };
81
82 extern void fpu_init(void);
83 extern int root_mountflags;
84 extern int _text, _etext, _edata, _end;
85
86 #define MV_NAME_SIZE 32
87
88 static struct sh_machine_vector* __init get_mv_byname(const char* name);
89
90 /*
91 * This is set up by the setup-routine at boot-time
92 */
93 #define PARAM ((unsigned char *)empty_zero_page)
94
95 #define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
96 #define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
97 #define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
98 #define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
99 #define INITRD_START (*(unsigned long *) (PARAM+0x010))
100 #define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
101 /* ... */
102 #define COMMAND_LINE ((char *) (PARAM+0x100))
103 #define COMMAND_LINE_SIZE 256
104
105 #define RAMDISK_IMAGE_START_MASK 0x07FF
106 #define RAMDISK_PROMPT_FLAG 0x8000
107 #define RAMDISK_LOAD_FLAG 0x4000
108
109 static char command_line[COMMAND_LINE_SIZE] = { 0, };
110 char saved_command_line[COMMAND_LINE_SIZE];
111
112 struct resource standard_io_resources[] = {
113 { "dma1", 0x00, 0x1f },
114 { "pic1", 0x20, 0x3f },
115 { "timer", 0x40, 0x5f },
116 { "keyboard", 0x60, 0x6f },
117 { "dma page reg", 0x80, 0x8f },
118 { "pic2", 0xa0, 0xbf },
119 { "dma2", 0xc0, 0xdf },
120 { "fpu", 0xf0, 0xff }
121 };
122
123 #define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource))
124
125 /* System RAM - interrupted by the 640kB-1M hole */
126 #define code_resource (ram_resources[3])
127 #define data_resource (ram_resources[4])
128 static struct resource ram_resources[] = {
129 { "System RAM", 0x000000, 0x09ffff, IORESOURCE_BUSY },
130 { "System RAM", 0x100000, 0x100000, IORESOURCE_BUSY },
131 { "Video RAM area", 0x0a0000, 0x0bffff },
132 { "Kernel code", 0x100000, 0 },
133 { "Kernel data", 0, 0 }
134 };
135
136 unsigned long memory_start, memory_end;
137
138 #ifdef CONFIG_SH_EARLY_PRINTK
139 /*
140 * Print a string through the BIOS
141 */
sh_console_write(struct console * co,const char * s,unsigned count)142 static void sh_console_write(struct console *co, const char *s,
143 unsigned count)
144 {
145 sh_bios_console_write(s, count);
146 }
147
sh_console_device(struct console * c)148 static kdev_t sh_console_device(struct console *c)
149 {
150 /* TODO: this is totally bogus */
151 /* return MKDEV(SCI_MAJOR, SCI_MINOR_START + c->index); */
152 return 0;
153 }
154
155 /*
156 * Setup initial baud/bits/parity. We do two things here:
157 * - construct a cflag setting for the first rs_open()
158 * - initialize the serial port
159 * Return non-zero if we didn't find a serial port.
160 */
sh_console_setup(struct console * co,char * options)161 static int __init sh_console_setup(struct console *co, char *options)
162 {
163 int cflag = CREAD | HUPCL | CLOCAL;
164
165 /*
166 * Now construct a cflag setting.
167 * TODO: this is a totally bogus cflag, as we have
168 * no idea what serial settings the BIOS is using, or
169 * even if its using the serial port at all.
170 */
171 cflag |= B115200 | CS8 | /*no parity*/0;
172
173 co->cflag = cflag;
174
175 return 0;
176 }
177
178 static struct console sh_console = {
179 name: "bios",
180 write: sh_console_write,
181 device: sh_console_device,
182 setup: sh_console_setup,
183 flags: CON_PRINTBUFFER,
184 index: -1,
185 };
186
sh_console_init(void)187 void sh_console_init(void)
188 {
189 register_console(&sh_console);
190 }
191
sh_console_unregister(void)192 void sh_console_unregister(void)
193 {
194 unregister_console(&sh_console);
195 }
196
197 #endif
198
parse_cmdline(char ** cmdline_p,char mv_name[MV_NAME_SIZE],struct sh_machine_vector ** mvp,unsigned long * mv_io_base,int * mv_mmio_enable)199 static inline void parse_cmdline (char ** cmdline_p, char mv_name[MV_NAME_SIZE],
200 struct sh_machine_vector** mvp,
201 unsigned long *mv_io_base,
202 int *mv_mmio_enable)
203 {
204 char c = ' ', *to = command_line, *from = COMMAND_LINE;
205 int len = 0;
206
207 /* Save unparsed command line copy for /proc/cmdline */
208 memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
209 saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
210
211 memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START;
212 memory_end = memory_start + __MEMORY_SIZE;
213
214 for (;;) {
215 /*
216 * "mem=XXX[kKmM]" defines a size of memory.
217 */
218 if (c == ' ' && !memcmp(from, "mem=", 4)) {
219 if (to != command_line)
220 to--;
221 {
222 unsigned long mem_size;
223
224 mem_size = memparse(from+4, &from);
225 memory_end = memory_start + mem_size;
226 }
227 }
228 if (c == ' ' && !memcmp(from, "sh_mv=", 6)) {
229 char* mv_end;
230 char* mv_comma;
231 int mv_len;
232 if (to != command_line)
233 to--;
234 from += 6;
235 mv_end = strchr(from, ' ');
236 if (mv_end == NULL)
237 mv_end = from + strlen(from);
238
239 mv_comma = strchr(from, ',');
240 if ((mv_comma != NULL) && (mv_comma < mv_end)) {
241 int ints[3];
242 get_options(mv_comma+1, ARRAY_SIZE(ints), ints);
243 *mv_io_base = ints[1];
244 *mv_mmio_enable = ints[2];
245 mv_len = mv_comma - from;
246 } else {
247 mv_len = mv_end - from;
248 }
249 if (mv_len > (MV_NAME_SIZE-1))
250 mv_len = MV_NAME_SIZE-1;
251 memcpy(mv_name, from, mv_len);
252 mv_name[mv_len] = '\0';
253 from = mv_end;
254
255 *mvp = get_mv_byname(mv_name);
256 }
257 c = *(from++);
258 if (!c)
259 break;
260 if (COMMAND_LINE_SIZE <= ++len)
261 break;
262 *(to++) = c;
263 }
264 *to = '\0';
265 *cmdline_p = command_line;
266 }
267
setup_arch(char ** cmdline_p)268 void __init setup_arch(char **cmdline_p)
269 {
270 #if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_UNKNOWN)
271 extern struct sh_machine_vector mv_unknown;
272 #endif
273 struct sh_machine_vector *mv = NULL;
274 char mv_name[MV_NAME_SIZE] = "";
275 unsigned long mv_io_base = 0;
276 int mv_mmio_enable = 0;
277 unsigned long bootmap_size;
278 unsigned long start_pfn, max_pfn, max_low_pfn;
279
280 #ifdef CONFIG_SH_EARLY_PRINTK
281 sh_console_init();
282 #endif
283
284 ROOT_DEV = to_kdev_t(ORIG_ROOT_DEV);
285
286 #ifdef CONFIG_BLK_DEV_RAM
287 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
288 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
289 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
290 #endif
291
292 if (!MOUNT_ROOT_RDONLY)
293 root_mountflags &= ~MS_RDONLY;
294 init_mm.start_code = (unsigned long)&_text;
295 init_mm.end_code = (unsigned long) &_etext;
296 init_mm.end_data = (unsigned long) &_edata;
297 init_mm.brk = (unsigned long) &_end;
298
299 code_resource.start = virt_to_bus(&_text);
300 code_resource.end = virt_to_bus(&_etext)-1;
301 data_resource.start = virt_to_bus(&_etext);
302 data_resource.end = virt_to_bus(&_edata)-1;
303
304 parse_cmdline(cmdline_p, mv_name, &mv, &mv_io_base, &mv_mmio_enable);
305
306 #ifdef CONFIG_CMDLINE_BOOL
307 sprintf(*cmdline_p, CONFIG_CMDLINE);
308 #endif
309
310 #ifdef CONFIG_SH_GENERIC
311 if (mv == NULL) {
312 mv = &mv_unknown;
313 if (*mv_name != '\0') {
314 printk("Warning: Unsupported machine %s, using unknown\n",
315 mv_name);
316 }
317 }
318 sh_mv = *mv;
319 #endif
320 #ifdef CONFIG_SH_UNKNOWN
321 sh_mv = mv_unknown;
322 #endif
323
324 #if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_UNKNOWN)
325 if (mv_io_base != 0) {
326 sh_mv.mv_inb = generic_inb;
327 sh_mv.mv_inw = generic_inw;
328 sh_mv.mv_inl = generic_inl;
329 sh_mv.mv_outb = generic_outb;
330 sh_mv.mv_outw = generic_outw;
331 sh_mv.mv_outl = generic_outl;
332
333 sh_mv.mv_inb_p = generic_inb_p;
334 sh_mv.mv_inw_p = generic_inw_p;
335 sh_mv.mv_inl_p = generic_inl_p;
336 sh_mv.mv_outb_p = generic_outb_p;
337 sh_mv.mv_outw_p = generic_outw_p;
338 sh_mv.mv_outl_p = generic_outl_p;
339
340 sh_mv.mv_insb = generic_insb;
341 sh_mv.mv_insw = generic_insw;
342 sh_mv.mv_insl = generic_insl;
343 sh_mv.mv_outsb = generic_outsb;
344 sh_mv.mv_outsw = generic_outsw;
345 sh_mv.mv_outsl = generic_outsl;
346
347 sh_mv.mv_isa_port2addr = generic_isa_port2addr;
348 generic_io_base = mv_io_base;
349 }
350 if (mv_mmio_enable != 0) {
351 sh_mv.mv_readb = generic_readb;
352 sh_mv.mv_readw = generic_readw;
353 sh_mv.mv_readl = generic_readl;
354 sh_mv.mv_writeb = generic_writeb;
355 sh_mv.mv_writew = generic_writew;
356 sh_mv.mv_writel = generic_writel;
357 }
358 #endif
359
360 #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
361 #define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
362 #define PFN_PHYS(x) ((x) << PAGE_SHIFT)
363
364 #ifdef CONFIG_DISCONTIGMEM
365 NODE_DATA(0)->bdata = &discontig_node_bdata[0];
366 NODE_DATA(1)->bdata = &discontig_node_bdata[1];
367
368 bootmap_size = init_bootmem_node(NODE_DATA(1),
369 PFN_UP(__MEMORY_START_2ND),
370 PFN_UP(__MEMORY_START_2ND),
371 PFN_DOWN(__MEMORY_START_2ND+__MEMORY_SIZE_2ND));
372 free_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, __MEMORY_SIZE_2ND);
373 reserve_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, bootmap_size);
374 #endif
375
376 /*
377 * Find the highest page frame number we have available
378 */
379 max_pfn = PFN_DOWN(__pa(memory_end));
380
381 /*
382 * Determine low and high memory ranges:
383 */
384 max_low_pfn = max_pfn;
385
386 /*
387 * Partially used pages are not usable - thus
388 * we are rounding upwards:
389 */
390 start_pfn = PFN_UP(__pa(&_end));
391 /*
392 * Find a proper area for the bootmem bitmap. After this
393 * bootstrap step all allocations (until the page allocator
394 * is intact) must be done via bootmem_alloc().
395 */
396 bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
397 __MEMORY_START>>PAGE_SHIFT,
398 max_low_pfn);
399
400 /*
401 * Register fully available low RAM pages with the bootmem allocator.
402 */
403 {
404 unsigned long curr_pfn, last_pfn, pages;
405
406 /*
407 * We are rounding up the start address of usable memory:
408 */
409 curr_pfn = PFN_UP(__MEMORY_START);
410 /*
411 * ... and at the end of the usable range downwards:
412 */
413 last_pfn = PFN_DOWN(__pa(memory_end));
414
415 if (last_pfn > max_low_pfn)
416 last_pfn = max_low_pfn;
417
418 pages = last_pfn - curr_pfn;
419 free_bootmem_node(NODE_DATA(0), PFN_PHYS(curr_pfn),
420 PFN_PHYS(pages));
421 }
422
423 /*
424 * Reserve the kernel text and
425 * Reserve the bootmem bitmap. We do this in two steps (first step
426 * was init_bootmem()), because this catches the (definitely buggy)
427 * case of us accidentally initializing the bootmem allocator with
428 * an invalid RAM area.
429 */
430 reserve_bootmem_node(NODE_DATA(0), __MEMORY_START+PAGE_SIZE,
431 (PFN_PHYS(start_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);
432
433 /*
434 * reserve physical page 0 - it's a special BIOS page on many boxes,
435 * enabling clean reboots, SMP operation, laptop functions.
436 */
437 reserve_bootmem_node(NODE_DATA(0), __MEMORY_START, PAGE_SIZE);
438
439 #ifdef CONFIG_BLK_DEV_INITRD
440 if (LOADER_TYPE && INITRD_START) {
441 if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
442 reserve_bootmem_node(NODE_DATA(0), INITRD_START+__MEMORY_START, INITRD_SIZE);
443 initrd_start =
444 INITRD_START ? INITRD_START + PAGE_OFFSET + __MEMORY_START : 0;
445 initrd_end = initrd_start + INITRD_SIZE;
446 } else {
447 printk("initrd extends beyond end of memory "
448 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
449 INITRD_START + INITRD_SIZE,
450 max_low_pfn << PAGE_SHIFT);
451 initrd_start = 0;
452 }
453 }
454 #endif
455
456 #if 0
457 /*
458 * Request the standard RAM and ROM resources -
459 * they eat up PCI memory space
460 */
461 request_resource(&iomem_resource, ram_resources+0);
462 request_resource(&iomem_resource, ram_resources+1);
463 request_resource(&iomem_resource, ram_resources+2);
464 request_resource(ram_resources+1, &code_resource);
465 request_resource(ram_resources+1, &data_resource);
466 probe_roms();
467
468 /* request I/O space for devices used on all i[345]86 PCs */
469 for (i = 0; i < STANDARD_IO_RESOURCES; i++)
470 request_resource(&ioport_resource, standard_io_resources+i);
471 #endif
472
473 #ifdef CONFIG_VT
474 #if defined(CONFIG_VGA_CONSOLE)
475 conswitchp = &vga_con;
476 #elif defined(CONFIG_DUMMY_CONSOLE)
477 conswitchp = &dummy_con;
478 #endif
479 #endif
480
481 /* Perform the machine specific initialisation */
482 if (sh_mv.mv_init_arch != NULL) {
483 sh_mv.mv_init_arch();
484 }
485
486 #if defined(__SH4__)
487 init_task.used_math = 0;
488 init_task.flags &= ~PF_USEDFPU;
489 #endif
490
491 #ifdef CONFIG_UBC_WAKEUP
492 /*
493 * Some brain-damaged loaders decided it would be a good idea to put
494 * the UBC to sleep. This causes some issues when it comes to things
495 * like PTRACE_SINGLESTEP or doing hardware watchpoints in GDB. So ..
496 * we wake it up and hope that all is well.
497 */
498 ubc_wakeup();
499 #endif
500
501 paging_init();
502 }
503
get_mv_byname(const char * name)504 struct sh_machine_vector* __init get_mv_byname(const char* name)
505 {
506 extern int strcasecmp(const char *, const char *);
507 extern long __machvec_start, __machvec_end;
508 struct sh_machine_vector *all_vecs =
509 (struct sh_machine_vector *)&__machvec_start;
510
511 int i, n = ((unsigned long)&__machvec_end
512 - (unsigned long)&__machvec_start)/
513 sizeof(struct sh_machine_vector);
514
515 for (i = 0; i < n; ++i) {
516 struct sh_machine_vector *mv = &all_vecs[i];
517 if (mv == NULL)
518 continue;
519 if (strcasecmp(name, mv->mv_name) == 0) {
520 return mv;
521 }
522 }
523 return NULL;
524 }
525
526 /*
527 * Get CPU information for use by the procfs.
528 */
529 #ifdef CONFIG_PROC_FS
show_cpuinfo(struct seq_file * m,void * v)530 static int show_cpuinfo(struct seq_file *m, void *v)
531 {
532 #if defined(__sh3__)
533 seq_printf(m, "cpu family\t: SH-3\n"
534 "cache size\t: 8K-byte\n");
535 #elif defined(__SH4__)
536 seq_printf(m, "cpu family\t: SH-4\n"
537 "cache size\t: 8K-byte/16K-byte\n");
538 #endif
539 seq_printf(m, "bogomips\t: %lu.%02lu\n\n",
540 loops_per_jiffy/(500000/HZ),
541 (loops_per_jiffy/(5000/HZ)) % 100);
542 seq_printf(m, "Machine: %s\n", sh_mv.mv_name);
543
544 #define PRINT_CLOCK(name, value) \
545 seq_printf(m, name " clock: %d.%02dMHz\n", \
546 ((value) / 1000000), ((value) % 1000000)/10000)
547
548 PRINT_CLOCK("CPU", boot_cpu_data.cpu_clock);
549 PRINT_CLOCK("Bus", boot_cpu_data.bus_clock);
550 #ifdef CONFIG_CPU_SUBTYPE_ST40
551 PRINT_CLOCK("Memory", boot_cpu_data.memory_clock);
552 #endif
553 PRINT_CLOCK("Peripheral module", boot_cpu_data.module_clock);
554
555 return 0;
556 }
557
c_start(struct seq_file * m,loff_t * pos)558 static void *c_start(struct seq_file *m, loff_t *pos)
559 {
560 return (void*)(*pos == 0);
561 }
c_next(struct seq_file * m,void * v,loff_t * pos)562 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
563 {
564 return NULL;
565 }
c_stop(struct seq_file * m,void * v)566 static void c_stop(struct seq_file *m, void *v)
567 {
568 }
569 struct seq_operations cpuinfo_op = {
570 start: c_start,
571 next: c_next,
572 stop: c_stop,
573 show: show_cpuinfo,
574 };
575 #endif /* CONFIG_PROC_FS */
576
577 #ifdef CONFIG_SH_KGDB
578 /*
579 * Parse command-line kgdb options. By default KGDB is enabled,
580 * entered on error (or other action) using default serial info.
581 * The command-line option can include a serial port specification
582 * and an action to override default or configured behavior.
583 */
584 struct kgdb_sermap kgdb_sci_sermap =
585 { "ttySC", 5, kgdb_sci_setup, NULL };
586
587 struct kgdb_sermap *kgdb_serlist = &kgdb_sci_sermap;
588 struct kgdb_sermap *kgdb_porttype = &kgdb_sci_sermap;
589
kgdb_register_sermap(struct kgdb_sermap * map)590 void kgdb_register_sermap(struct kgdb_sermap *map)
591 {
592 struct kgdb_sermap *last;
593
594 for (last = kgdb_serlist; last->next; last = last->next)
595 ;
596 last->next = map;
597 if (!map->namelen) {
598 map->namelen = strlen(map->name);
599 }
600 }
601
kgdb_parse_options(char * options)602 static int __init kgdb_parse_options(char *options)
603 {
604 char c;
605 int baud;
606
607 /* Check for port spec (or use default) */
608
609 /* Determine port type and instance */
610 if (!memcmp(options, "tty", 3)) {
611 struct kgdb_sermap *map = kgdb_serlist;
612
613 while (map && memcmp(options, map->name, map->namelen))
614 map = map->next;
615
616 if (!map) {
617 KGDB_PRINTK("unknown port spec in %s\n", options);
618 return -1;
619 }
620
621 kgdb_porttype = map;
622 kgdb_serial_setup = map->setup_fn;
623 kgdb_portnum = options[map->namelen] - '0';
624 options += map->namelen + 1;
625
626 options = (*options == ',') ? options+1 : options;
627
628 /* Read optional parameters (baud/parity/bits) */
629 baud = simple_strtoul(options, &options, 10);
630 if (baud != 0) {
631 kgdb_baud = baud;
632
633 c = toupper(*options);
634 if (c == 'E' || c == 'O' || c == 'N') {
635 kgdb_parity = c;
636 options++;
637 }
638
639 c = *options;
640 if (c == '7' || c == '8') {
641 kgdb_bits = c;
642 options++;
643 }
644 options = (*options == ',') ? options+1 : options;
645 }
646 }
647
648 /* Check for action specification */
649 if (!memcmp(options, "halt", 4)) {
650 kgdb_halt = 1;
651 options += 4;
652 } else if (!memcmp(options, "disabled", 8)) {
653 kgdb_enabled = 0;
654 options += 8;
655 }
656
657 if (*options) {
658 KGDB_PRINTK("ignored unknown options: %s\n", options);
659 return 0;
660 }
661 return 1;
662 }
663 __setup("kgdb=", kgdb_parse_options);
664 #endif /* CONFIG_SH_KGDB */
665
666