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Linux 2.6.25-rc4
[linux-2.6/next.git] / arch / blackfin / kernel / setup.c
blob2255c289a714db37938d0b96345de10335dbc7ae
1 /*
2 * arch/blackfin/kernel/setup.c
3 *
4 * Copyright 2004-2006 Analog Devices Inc.
5 *
6 * Enter bugs at http://blackfin.uclinux.org/
7 *
8 * Licensed under the GPL-2 or later.
9 */
10
11 #include <linux/delay.h>
12 #include <linux/console.h>
13 #include <linux/bootmem.h>
14 #include <linux/seq_file.h>
15 #include <linux/cpu.h>
16 #include <linux/module.h>
17 #include <linux/tty.h>
18 #include <linux/pfn.h>
19
20 #include <linux/ext2_fs.h>
21 #include <linux/cramfs_fs.h>
22 #include <linux/romfs_fs.h>
23
24 #include <asm/cplb.h>
25 #include <asm/cacheflush.h>
26 #include <asm/blackfin.h>
27 #include <asm/cplbinit.h>
28 #include <asm/div64.h>
29 #include <asm/fixed_code.h>
30 #include <asm/early_printk.h>
31
32 static DEFINE_PER_CPU(struct cpu, cpu_devices);
33
34 u16 _bfin_swrst;
35 EXPORT_SYMBOL(_bfin_swrst);
36
37 unsigned long memory_start, memory_end, physical_mem_end;
38 unsigned long reserved_mem_dcache_on;
39 unsigned long reserved_mem_icache_on;
40 EXPORT_SYMBOL(memory_start);
41 EXPORT_SYMBOL(memory_end);
42 EXPORT_SYMBOL(physical_mem_end);
43 EXPORT_SYMBOL(_ramend);
44
45 #ifdef CONFIG_MTD_UCLINUX
46 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
47 unsigned long _ebss;
48 EXPORT_SYMBOL(memory_mtd_end);
49 EXPORT_SYMBOL(memory_mtd_start);
50 EXPORT_SYMBOL(mtd_size);
51 #endif
52
53 char __initdata command_line[COMMAND_LINE_SIZE];
54
55 /* boot memmap, for parsing "memmap=" */
56 #define BFIN_MEMMAP_MAX 128 /* number of entries in bfin_memmap */
57 #define BFIN_MEMMAP_RAM 1
58 #define BFIN_MEMMAP_RESERVED 2
59 struct bfin_memmap {
60 int nr_map;
61 struct bfin_memmap_entry {
62 unsigned long long addr; /* start of memory segment */
63 unsigned long long size;
64 unsigned long type;
65 } map[BFIN_MEMMAP_MAX];
66 } bfin_memmap __initdata;
67
68 /* for memmap sanitization */
69 struct change_member {
70 struct bfin_memmap_entry *pentry; /* pointer to original entry */
71 unsigned long long addr; /* address for this change point */
72 };
73 static struct change_member change_point_list[2*BFIN_MEMMAP_MAX] __initdata;
74 static struct change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata;
75 static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata;
76 static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata;
77
78 void __init bf53x_cache_init(void)
79 {
80 #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
81 generate_cpl_tables();
82 #endif
83
84 #ifdef CONFIG_BFIN_ICACHE
85 bfin_icache_init();
86 printk(KERN_INFO "Instruction Cache Enabled\n");
87 #endif
88
89 #ifdef CONFIG_BFIN_DCACHE
90 bfin_dcache_init();
91 printk(KERN_INFO "Data Cache Enabled"
92 # if defined CONFIG_BFIN_WB
93 " (write-back)"
94 # elif defined CONFIG_BFIN_WT
95 " (write-through)"
96 # endif
97 "\n");
98 #endif
99 }
100
101 void __init bf53x_relocate_l1_mem(void)
102 {
103 unsigned long l1_code_length;
104 unsigned long l1_data_a_length;
105 unsigned long l1_data_b_length;
106
107 l1_code_length = _etext_l1 - _stext_l1;
108 if (l1_code_length > L1_CODE_LENGTH)
109 l1_code_length = L1_CODE_LENGTH;
110 /* cannot complain as printk is not available as yet.
111 * But we can continue booting and complain later!
112 */
113
114 /* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
115 dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);
116
117 l1_data_a_length = _ebss_l1 - _sdata_l1;
118 if (l1_data_a_length > L1_DATA_A_LENGTH)
119 l1_data_a_length = L1_DATA_A_LENGTH;
120
121 /* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */
122 dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);
123
124 l1_data_b_length = _ebss_b_l1 - _sdata_b_l1;
125 if (l1_data_b_length > L1_DATA_B_LENGTH)
126 l1_data_b_length = L1_DATA_B_LENGTH;
127
128 /* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */
129 dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
130 l1_data_a_length, l1_data_b_length);
131
132 }
133
134 /* add_memory_region to memmap */
135 static void __init add_memory_region(unsigned long long start,
136 unsigned long long size, int type)
137 {
138 int i;
139
140 i = bfin_memmap.nr_map;
141
142 if (i == BFIN_MEMMAP_MAX) {
143 printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
144 return;
145 }
146
147 bfin_memmap.map[i].addr = start;
148 bfin_memmap.map[i].size = size;
149 bfin_memmap.map[i].type = type;
150 bfin_memmap.nr_map++;
151 }
152
153 /*
154 * Sanitize the boot memmap, removing overlaps.
155 */
156 static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
157 {
158 struct change_member *change_tmp;
159 unsigned long current_type, last_type;
160 unsigned long long last_addr;
161 int chgidx, still_changing;
162 int overlap_entries;
163 int new_entry;
164 int old_nr, new_nr, chg_nr;
165 int i;
166
167 /*
168 Visually we're performing the following (1,2,3,4 = memory types)
169
170 Sample memory map (w/overlaps):
171 ____22__________________
172 ______________________4_
173 ____1111________________
174 _44_____________________
175 11111111________________
176 ____________________33__
177 ___________44___________
178 __________33333_________
179 ______________22________
180 ___________________2222_
181 _________111111111______
182 _____________________11_
183 _________________4______
184
185 Sanitized equivalent (no overlap):
186 1_______________________
187 _44_____________________
188 ___1____________________
189 ____22__________________
190 ______11________________
191 _________1______________
192 __________3_____________
193 ___________44___________
194 _____________33_________
195 _______________2________
196 ________________1_______
197 _________________4______
198 ___________________2____
199 ____________________33__
200 ______________________4_
201 */
202 /* if there's only one memory region, don't bother */
203 if (*pnr_map < 2)
204 return -1;
205
206 old_nr = *pnr_map;
207
208 /* bail out if we find any unreasonable addresses in memmap */
209 for (i = 0; i < old_nr; i++)
210 if (map[i].addr + map[i].size < map[i].addr)
211 return -1;
212
213 /* create pointers for initial change-point information (for sorting) */
214 for (i = 0; i < 2*old_nr; i++)
215 change_point[i] = &change_point_list[i];
216
217 /* record all known change-points (starting and ending addresses),
218 omitting those that are for empty memory regions */
219 chgidx = 0;
220 for (i = 0; i < old_nr; i++) {
221 if (map[i].size != 0) {
222 change_point[chgidx]->addr = map[i].addr;
223 change_point[chgidx++]->pentry = &map[i];
224 change_point[chgidx]->addr = map[i].addr + map[i].size;
225 change_point[chgidx++]->pentry = &map[i];
226 }
227 }
228 chg_nr = chgidx; /* true number of change-points */
229
230 /* sort change-point list by memory addresses (low -> high) */
231 still_changing = 1;
232 while (still_changing) {
233 still_changing = 0;
234 for (i = 1; i < chg_nr; i++) {
235 /* if <current_addr> > <last_addr>, swap */
236 /* or, if current=<start_addr> & last=<end_addr>, swap */
237 if ((change_point[i]->addr < change_point[i-1]->addr) ||
238 ((change_point[i]->addr == change_point[i-1]->addr) &&
239 (change_point[i]->addr == change_point[i]->pentry->addr) &&
240 (change_point[i-1]->addr != change_point[i-1]->pentry->addr))
241 ) {
242 change_tmp = change_point[i];
243 change_point[i] = change_point[i-1];
244 change_point[i-1] = change_tmp;
245 still_changing = 1;
246 }
247 }
248 }
249
250 /* create a new memmap, removing overlaps */
251 overlap_entries = 0; /* number of entries in the overlap table */
252 new_entry = 0; /* index for creating new memmap entries */
253 last_type = 0; /* start with undefined memory type */
254 last_addr = 0; /* start with 0 as last starting address */
255 /* loop through change-points, determining affect on the new memmap */
256 for (chgidx = 0; chgidx < chg_nr; chgidx++) {
257 /* keep track of all overlapping memmap entries */
258 if (change_point[chgidx]->addr == change_point[chgidx]->pentry->addr) {
259 /* add map entry to overlap list (> 1 entry implies an overlap) */
260 overlap_list[overlap_entries++] = change_point[chgidx]->pentry;
261 } else {
262 /* remove entry from list (order independent, so swap with last) */
263 for (i = 0; i < overlap_entries; i++) {
264 if (overlap_list[i] == change_point[chgidx]->pentry)
265 overlap_list[i] = overlap_list[overlap_entries-1];
266 }
267 overlap_entries--;
268 }
269 /* if there are overlapping entries, decide which "type" to use */
270 /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
271 current_type = 0;
272 for (i = 0; i < overlap_entries; i++)
273 if (overlap_list[i]->type > current_type)
274 current_type = overlap_list[i]->type;
275 /* continue building up new memmap based on this information */
276 if (current_type != last_type) {
277 if (last_type != 0) {
278 new_map[new_entry].size =
279 change_point[chgidx]->addr - last_addr;
280 /* move forward only if the new size was non-zero */
281 if (new_map[new_entry].size != 0)
282 if (++new_entry >= BFIN_MEMMAP_MAX)
283 break; /* no more space left for new entries */
284 }
285 if (current_type != 0) {
286 new_map[new_entry].addr = change_point[chgidx]->addr;
287 new_map[new_entry].type = current_type;
288 last_addr = change_point[chgidx]->addr;
289 }
290 last_type = current_type;
291 }
292 }
293 new_nr = new_entry; /* retain count for new entries */
294
295 /* copy new mapping into original location */
296 memcpy(map, new_map, new_nr*sizeof(struct bfin_memmap_entry));
297 *pnr_map = new_nr;
298
299 return 0;
300 }
301
302 static void __init print_memory_map(char *who)
303 {
304 int i;
305
306 for (i = 0; i < bfin_memmap.nr_map; i++) {
307 printk(KERN_DEBUG " %s: %016Lx - %016Lx ", who,
308 bfin_memmap.map[i].addr,
309 bfin_memmap.map[i].addr + bfin_memmap.map[i].size);
310 switch (bfin_memmap.map[i].type) {
311 case BFIN_MEMMAP_RAM:
312 printk("(usable)\n");
313 break;
314 case BFIN_MEMMAP_RESERVED:
315 printk("(reserved)\n");
316 break;
317 default: printk("type %lu\n", bfin_memmap.map[i].type);
318 break;
319 }
320 }
321 }
322
323 static __init int parse_memmap(char *arg)
324 {
325 unsigned long long start_at, mem_size;
326
327 if (!arg)
328 return -EINVAL;
329
330 mem_size = memparse(arg, &arg);
331 if (*arg == '@') {
332 start_at = memparse(arg+1, &arg);
333 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RAM);
334 } else if (*arg == '$') {
335 start_at = memparse(arg+1, &arg);
336 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RESERVED);
337 }
338
339 return 0;
340 }
341
342 /*
343 * Initial parsing of the command line. Currently, we support:
344 * - Controlling the linux memory size: mem=xxx[KMG]
345 * - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
346 * $ -> reserved memory is dcacheable
347 * # -> reserved memory is icacheable
348 * - "memmap=XXX[KkmM][@][$]XXX[KkmM]" defines a memory region
349 * @ from <start> to <start>+<mem>, type RAM
350 * $ from <start> to <start>+<mem>, type RESERVED
351 *
352 */
353 static __init void parse_cmdline_early(char *cmdline_p)
354 {
355 char c = ' ', *to = cmdline_p;
356 unsigned int memsize;
357 for (;;) {
358 if (c == ' ') {
359 if (!memcmp(to, "mem=", 4)) {
360 to += 4;
361 memsize = memparse(to, &to);
362 if (memsize)
363 _ramend = memsize;
364
365 } else if (!memcmp(to, "max_mem=", 8)) {
366 to += 8;
367 memsize = memparse(to, &to);
368 if (memsize) {
369 physical_mem_end = memsize;
370 if (*to != ' ') {
371 if (*to == '$'
372 || *(to + 1) == '$')
373 reserved_mem_dcache_on =
374 1;
375 if (*to == '#'
376 || *(to + 1) == '#')
377 reserved_mem_icache_on =
378 1;
379 }
380 }
381 } else if (!memcmp(to, "earlyprintk=", 12)) {
382 to += 12;
383 setup_early_printk(to);
384 } else if (!memcmp(to, "memmap=", 7)) {
385 to += 7;
386 parse_memmap(to);
387 }
388 }
389 c = *(to++);
390 if (!c)
391 break;
392 }
393 }
394
395 /*
396 * Setup memory defaults from user config.
397 * The physical memory layout looks like:
398 *
399 * [_rambase, _ramstart]: kernel image
400 * [memory_start, memory_end]: dynamic memory managed by kernel
401 * [memory_end, _ramend]: reserved memory
402 * [meory_mtd_start(memory_end),
403 * memory_mtd_start + mtd_size]: rootfs (if any)
404 * [_ramend - DMA_UNCACHED_REGION,
405 * _ramend]: uncached DMA region
406 * [_ramend, physical_mem_end]: memory not managed by kernel
407 *
408 */
409 static __init void memory_setup(void)
410 {
411 #ifdef CONFIG_MTD_UCLINUX
412 unsigned long mtd_phys = 0;
413 #endif
414
415 _rambase = (unsigned long)_stext;
416 _ramstart = (unsigned long)_end;
417
418 if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) {
419 console_init();
420 panic("DMA region exceeds memory limit: %lu.\n",
421 _ramend - _ramstart);
422 }
423 memory_end = _ramend - DMA_UNCACHED_REGION;
424
425 #ifdef CONFIG_MPU
426 /* Round up to multiple of 4MB. */
427 memory_start = (_ramstart + 0x3fffff) & ~0x3fffff;
428 #else
429 memory_start = PAGE_ALIGN(_ramstart);
430 #endif
431
432 #if defined(CONFIG_MTD_UCLINUX)
433 /* generic memory mapped MTD driver */
434 memory_mtd_end = memory_end;
435
436 mtd_phys = _ramstart;
437 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
438
439 # if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
440 if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
441 mtd_size =
442 PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
443 # endif
444
445 # if defined(CONFIG_CRAMFS)
446 if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
447 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
448 # endif
449
450 # if defined(CONFIG_ROMFS_FS)
451 if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
452 && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
453 mtd_size =
454 PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
455 # if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
456 /* Due to a Hardware Anomaly we need to limit the size of usable
457 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
458 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
459 */
460 # if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
461 if (memory_end >= 56 * 1024 * 1024)
462 memory_end = 56 * 1024 * 1024;
463 # else
464 if (memory_end >= 60 * 1024 * 1024)
465 memory_end = 60 * 1024 * 1024;
466 # endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
467 # endif /* ANOMALY_05000263 */
468 # endif /* CONFIG_ROMFS_FS */
469
470 memory_end -= mtd_size;
471
472 if (mtd_size == 0) {
473 console_init();
474 panic("Don't boot kernel without rootfs attached.\n");
475 }
476
477 /* Relocate MTD image to the top of memory after the uncached memory area */
478 dma_memcpy((char *)memory_end, _end, mtd_size);
479
480 memory_mtd_start = memory_end;
481 _ebss = memory_mtd_start; /* define _ebss for compatible */
482 #endif /* CONFIG_MTD_UCLINUX */
483
484 #if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
485 /* Due to a Hardware Anomaly we need to limit the size of usable
486 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
487 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
488 */
489 #if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
490 if (memory_end >= 56 * 1024 * 1024)
491 memory_end = 56 * 1024 * 1024;
492 #else
493 if (memory_end >= 60 * 1024 * 1024)
494 memory_end = 60 * 1024 * 1024;
495 #endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
496 printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
497 #endif /* ANOMALY_05000263 */
498
499 #ifdef CONFIG_MPU
500 page_mask_nelts = ((_ramend >> PAGE_SHIFT) + 31) / 32;
501 page_mask_order = get_order(3 * page_mask_nelts * sizeof(long));
502 #endif
503
504 #if !defined(CONFIG_MTD_UCLINUX)
505 /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
506 memory_end -= SIZE_4K;
507 #endif
508
509 init_mm.start_code = (unsigned long)_stext;
510 init_mm.end_code = (unsigned long)_etext;
511 init_mm.end_data = (unsigned long)_edata;
512 init_mm.brk = (unsigned long)0;
513
514 printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
515 printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
516
517 printk(KERN_INFO "Memory map:\n"
518 KERN_INFO " fixedcode = 0x%p-0x%p\n"
519 KERN_INFO " text = 0x%p-0x%p\n"
520 KERN_INFO " rodata = 0x%p-0x%p\n"
521 KERN_INFO " bss = 0x%p-0x%p\n"
522 KERN_INFO " data = 0x%p-0x%p\n"
523 KERN_INFO " stack = 0x%p-0x%p\n"
524 KERN_INFO " init = 0x%p-0x%p\n"
525 KERN_INFO " available = 0x%p-0x%p\n"
526 #ifdef CONFIG_MTD_UCLINUX
527 KERN_INFO " rootfs = 0x%p-0x%p\n"
528 #endif
529 #if DMA_UNCACHED_REGION > 0
530 KERN_INFO " DMA Zone = 0x%p-0x%p\n"
531 #endif
532 , (void *)FIXED_CODE_START, (void *)FIXED_CODE_END,
533 _stext, _etext,
534 __start_rodata, __end_rodata,
535 __bss_start, __bss_stop,
536 _sdata, _edata,
537 (void *)&init_thread_union,
538 (void *)((int)(&init_thread_union) + 0x2000),
539 __init_begin, __init_end,
540 (void *)_ramstart, (void *)memory_end
541 #ifdef CONFIG_MTD_UCLINUX
542 , (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
543 #endif
544 #if DMA_UNCACHED_REGION > 0
545 , (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
546 #endif
547 );
548 }
549
550 static __init void setup_bootmem_allocator(void)
551 {
552 int bootmap_size;
553 int i;
554 unsigned long min_pfn, max_pfn;
555 unsigned long curr_pfn, last_pfn, size;
556
557 /* mark memory between memory_start and memory_end usable */
558 add_memory_region(memory_start,
559 memory_end - memory_start, BFIN_MEMMAP_RAM);
560 /* sanity check for overlap */
561 sanitize_memmap(bfin_memmap.map, &bfin_memmap.nr_map);
562 print_memory_map("boot memmap");
563
564 min_pfn = PAGE_OFFSET >> PAGE_SHIFT;
565 max_pfn = memory_end >> PAGE_SHIFT;
566
567 /*
568 * give all the memory to the bootmap allocator, tell it to put the
569 * boot mem_map at the start of memory.
570 */
571 bootmap_size = init_bootmem_node(NODE_DATA(0),
572 memory_start >> PAGE_SHIFT, /* map goes here */
573 min_pfn, max_pfn);
574
575 /* register the memmap regions with the bootmem allocator */
576 for (i = 0; i < bfin_memmap.nr_map; i++) {
577 /*
578 * Reserve usable memory
579 */
580 if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
581 continue;
582 /*
583 * We are rounding up the start address of usable memory:
584 */
585 curr_pfn = PFN_UP(bfin_memmap.map[i].addr);
586 if (curr_pfn >= max_pfn)
587 continue;
588 /*
589 * ... and at the end of the usable range downwards:
590 */
591 last_pfn = PFN_DOWN(bfin_memmap.map[i].addr +
592 bfin_memmap.map[i].size);
593
594 if (last_pfn > max_pfn)
595 last_pfn = max_pfn;
596
597 /*
598 * .. finally, did all the rounding and playing
599 * around just make the area go away?
600 */
601 if (last_pfn <= curr_pfn)
602 continue;
603
604 size = last_pfn - curr_pfn;
605 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
606 }
607
608 /* reserve memory before memory_start, including bootmap */
609 reserve_bootmem(PAGE_OFFSET,
610 memory_start + bootmap_size + PAGE_SIZE - 1 - PAGE_OFFSET,
611 BOOTMEM_DEFAULT);
612 }
613
614 void __init setup_arch(char **cmdline_p)
615 {
616 unsigned long l1_length, sclk, cclk;
617
618 #ifdef CONFIG_DUMMY_CONSOLE
619 conswitchp = &dummy_con;
620 #endif
621
622 #if defined(CONFIG_CMDLINE_BOOL)
623 strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
624 command_line[sizeof(command_line) - 1] = 0;
625 #endif
626
627 /* Keep a copy of command line */
628 *cmdline_p = &command_line[0];
629 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
630 boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
631
632 /* setup memory defaults from the user config */
633 physical_mem_end = 0;
634 _ramend = CONFIG_MEM_SIZE * 1024 * 1024;
635
636 memset(&bfin_memmap, 0, sizeof(bfin_memmap));
637
638 parse_cmdline_early(&command_line[0]);
639
640 if (physical_mem_end == 0)
641 physical_mem_end = _ramend;
642
643 memory_setup();
644
645 cclk = get_cclk();
646 sclk = get_sclk();
647
648 #if !defined(CONFIG_BFIN_KERNEL_CLOCK)
649 if (ANOMALY_05000273 && cclk == sclk)
650 panic("ANOMALY 05000273, SCLK can not be same as CCLK");
651 #endif
652
653 #ifdef BF561_FAMILY
654 if (ANOMALY_05000266) {
655 bfin_read_IMDMA_D0_IRQ_STATUS();
656 bfin_read_IMDMA_D1_IRQ_STATUS();
657 }
658 #endif
659 printk(KERN_INFO "Hardware Trace ");
660 if (bfin_read_TBUFCTL() & 0x1)
661 printk("Active ");
662 else
663 printk("Off ");
664 if (bfin_read_TBUFCTL() & 0x2)
665 printk("and Enabled\n");
666 else
667 printk("and Disabled\n");
668
669 #if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
670 /* we need to initialize the Flashrom device here since we might
671 * do things with flash early on in the boot
672 */
673 flash_probe();
674 #endif
675
676 _bfin_swrst = bfin_read_SWRST();
677
678 if (_bfin_swrst & RESET_DOUBLE)
679 printk(KERN_INFO "Recovering from Double Fault event\n");
680 else if (_bfin_swrst & RESET_WDOG)
681 printk(KERN_INFO "Recovering from Watchdog event\n");
682 else if (_bfin_swrst & RESET_SOFTWARE)
683 printk(KERN_NOTICE "Reset caused by Software reset\n");
684
685 printk(KERN_INFO "Blackfin support (C) 2004-2008 Analog Devices, Inc.\n");
686 if (bfin_compiled_revid() == 0xffff)
687 printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
688 else if (bfin_compiled_revid() == -1)
689 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
690 else
691 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
692 if (bfin_revid() != bfin_compiled_revid()) {
693 if (bfin_compiled_revid() == -1)
694 printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
695 bfin_revid());
696 else if (bfin_compiled_revid() != 0xffff)
697 printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
698 bfin_compiled_revid(), bfin_revid());
699 }
700 if (bfin_revid() < SUPPORTED_REVID)
701 printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
702 CPU, bfin_revid());
703 printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
704
705 printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
706 cclk / 1000000, sclk / 1000000);
707
708 if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
709 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
710
711 setup_bootmem_allocator();
712
713 paging_init();
714
715 /* check the size of the l1 area */
716 l1_length = _etext_l1 - _stext_l1;
717 if (l1_length > L1_CODE_LENGTH)
718 panic("L1 code memory overflow\n");
719
720 l1_length = _ebss_l1 - _sdata_l1;
721 if (l1_length > L1_DATA_A_LENGTH)
722 panic("L1 data memory overflow\n");
723
724 /* Copy atomic sequences to their fixed location, and sanity check that
725 these locations are the ones that we advertise to userspace. */
726 memcpy((void *)FIXED_CODE_START, &fixed_code_start,
727 FIXED_CODE_END - FIXED_CODE_START);
728 BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
729 != SIGRETURN_STUB - FIXED_CODE_START);
730 BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
731 != ATOMIC_XCHG32 - FIXED_CODE_START);
732 BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
733 != ATOMIC_CAS32 - FIXED_CODE_START);
734 BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
735 != ATOMIC_ADD32 - FIXED_CODE_START);
736 BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
737 != ATOMIC_SUB32 - FIXED_CODE_START);
738 BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
739 != ATOMIC_IOR32 - FIXED_CODE_START);
740 BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
741 != ATOMIC_AND32 - FIXED_CODE_START);
742 BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
743 != ATOMIC_XOR32 - FIXED_CODE_START);
744 BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
745 != SAFE_USER_INSTRUCTION - FIXED_CODE_START);
746
747 init_exception_vectors();
748 bf53x_cache_init();
749 }
750
751 static int __init topology_init(void)
752 {
753 int cpu;
754
755 for_each_possible_cpu(cpu) {
756 struct cpu *c = &per_cpu(cpu_devices, cpu);
757
758 register_cpu(c, cpu);
759 }
760
761 return 0;
762 }
763
764 subsys_initcall(topology_init);
765
766 static u_long get_vco(void)
767 {
768 u_long msel;
769 u_long vco;
770
771 msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
772 if (0 == msel)
773 msel = 64;
774
775 vco = CONFIG_CLKIN_HZ;
776 vco >>= (1 & bfin_read_PLL_CTL()); /* DF bit */
777 vco = msel * vco;
778 return vco;
779 }
780
781 /* Get the Core clock */
782 u_long get_cclk(void)
783 {
784 u_long csel, ssel;
785 if (bfin_read_PLL_STAT() & 0x1)
786 return CONFIG_CLKIN_HZ;
787
788 ssel = bfin_read_PLL_DIV();
789 csel = ((ssel >> 4) & 0x03);
790 ssel &= 0xf;
791 if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
792 return get_vco() / ssel;
793 return get_vco() >> csel;
794 }
795 EXPORT_SYMBOL(get_cclk);
796
797 /* Get the System clock */
798 u_long get_sclk(void)
799 {
800 u_long ssel;
801
802 if (bfin_read_PLL_STAT() & 0x1)
803 return CONFIG_CLKIN_HZ;
804
805 ssel = (bfin_read_PLL_DIV() & 0xf);
806 if (0 == ssel) {
807 printk(KERN_WARNING "Invalid System Clock\n");
808 ssel = 1;
809 }
810
811 return get_vco() / ssel;
812 }
813 EXPORT_SYMBOL(get_sclk);
814
815 unsigned long sclk_to_usecs(unsigned long sclk)
816 {
817 u64 tmp = USEC_PER_SEC * (u64)sclk;
818 do_div(tmp, get_sclk());
819 return tmp;
820 }
821 EXPORT_SYMBOL(sclk_to_usecs);
822
823 unsigned long usecs_to_sclk(unsigned long usecs)
824 {
825 u64 tmp = get_sclk() * (u64)usecs;
826 do_div(tmp, USEC_PER_SEC);
827 return tmp;
828 }
829 EXPORT_SYMBOL(usecs_to_sclk);
830
831 /*
832 * Get CPU information for use by the procfs.
833 */
834 static int show_cpuinfo(struct seq_file *m, void *v)
835 {
836 char *cpu, *mmu, *fpu, *vendor, *cache;
837 uint32_t revid;
838
839 u_long cclk = 0, sclk = 0;
840 u_int dcache_size = 0, dsup_banks = 0;
841
842 cpu = CPU;
843 mmu = "none";
844 fpu = "none";
845 revid = bfin_revid();
846
847 cclk = get_cclk();
848 sclk = get_sclk();
849
850 switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
851 case 0xca:
852 vendor = "Analog Devices";
853 break;
854 default:
855 vendor = "unknown";
856 break;
857 }
858
859 seq_printf(m, "processor\t: %d\n"
860 "vendor_id\t: %s\n"
861 "cpu family\t: 0x%x\n"
862 "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK)\n"
863 "stepping\t: %d\n",
864 0,
865 vendor,
866 (bfin_read_CHIPID() & CHIPID_FAMILY),
867 cpu, cclk/1000000, sclk/1000000,
868 revid);
869
870 seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
871 cclk/1000000, cclk%1000000,
872 sclk/1000000, sclk%1000000);
873 seq_printf(m, "bogomips\t: %lu.%02lu\n"
874 "Calibration\t: %lu loops\n",
875 (loops_per_jiffy * HZ) / 500000,
876 ((loops_per_jiffy * HZ) / 5000) % 100,
877 (loops_per_jiffy * HZ));
878
879 /* Check Cache configutation */
880 switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
881 case ACACHE_BSRAM:
882 cache = "dbank-A/B\t: cache/sram";
883 dcache_size = 16;
884 dsup_banks = 1;
885 break;
886 case ACACHE_BCACHE:
887 cache = "dbank-A/B\t: cache/cache";
888 dcache_size = 32;
889 dsup_banks = 2;
890 break;
891 case ASRAM_BSRAM:
892 cache = "dbank-A/B\t: sram/sram";
893 dcache_size = 0;
894 dsup_banks = 0;
895 break;
896 default:
897 cache = "unknown";
898 dcache_size = 0;
899 dsup_banks = 0;
900 break;
901 }
902
903 /* Is it turned on? */
904 if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
905 dcache_size = 0;
906
907 seq_printf(m, "cache size\t: %d KB(L1 icache) "
908 "%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
909 BFIN_ICACHESIZE / 1024, dcache_size,
910 #if defined CONFIG_BFIN_WB
911 "wb"
912 #elif defined CONFIG_BFIN_WT
913 "wt"
914 #endif
915 "", 0);
916
917 seq_printf(m, "%s\n", cache);
918
919 seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
920 BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
921 seq_printf(m,
922 "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
923 dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
924 BFIN_DLINES);
925 #ifdef CONFIG_BFIN_ICACHE_LOCK
926 switch (read_iloc()) {
927 case WAY0_L:
928 seq_printf(m, "Way0 Locked-Down\n");
929 break;
930 case WAY1_L:
931 seq_printf(m, "Way1 Locked-Down\n");
932 break;
933 case WAY01_L:
934 seq_printf(m, "Way0,Way1 Locked-Down\n");
935 break;
936 case WAY2_L:
937 seq_printf(m, "Way2 Locked-Down\n");
938 break;
939 case WAY02_L:
940 seq_printf(m, "Way0,Way2 Locked-Down\n");
941 break;
942 case WAY12_L:
943 seq_printf(m, "Way1,Way2 Locked-Down\n");
944 break;
945 case WAY012_L:
946 seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
947 break;
948 case WAY3_L:
949 seq_printf(m, "Way3 Locked-Down\n");
950 break;
951 case WAY03_L:
952 seq_printf(m, "Way0,Way3 Locked-Down\n");
953 break;
954 case WAY13_L:
955 seq_printf(m, "Way1,Way3 Locked-Down\n");
956 break;
957 case WAY013_L:
958 seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
959 break;
960 case WAY32_L:
961 seq_printf(m, "Way3,Way2 Locked-Down\n");
962 break;
963 case WAY320_L:
964 seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
965 break;
966 case WAY321_L:
967 seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
968 break;
969 case WAYALL_L:
970 seq_printf(m, "All Ways are locked\n");
971 break;
972 default:
973 seq_printf(m, "No Ways are locked\n");
974 }
975 #endif
976
977 seq_printf(m, "board name\t: %s\n", bfin_board_name);
978 seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
979 physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
980 seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
981 ((int)memory_end - (int)_stext) >> 10,
982 _stext,
983 (void *)memory_end);
984
985 return 0;
986 }
987
988 static void *c_start(struct seq_file *m, loff_t *pos)
989 {
990 return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
991 }
992
993 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
994 {
995 ++*pos;
996 return c_start(m, pos);
997 }
998
999 static void c_stop(struct seq_file *m, void *v)
1000 {
1001 }
1002
1003 const struct seq_operations cpuinfo_op = {
1004 .start = c_start,
1005 .next = c_next,
1006 .stop = c_stop,
1007 .show = show_cpuinfo,
1008 };
1009
1010 void __init cmdline_init(const char *r0)
1011 {
1012 if (r0)
1013 strncpy(command_line, r0, COMMAND_LINE_SIZE);
1014 }
linux-next