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[Blackfin] arch: remove duplicated prototypes for internal cplb structures from the...
[deliverable/linux.git] / arch / blackfin / kernel / setup.c
CommitLineData
1394f032 1/*
550d5538 2 * arch/blackfin/kernel/setup.c
1394f032 3 *
550d5538 4 * Copyright 2004-2006 Analog Devices Inc.
1394f032 5 *
550d5538 6 * Enter bugs at http://blackfin.uclinux.org/
1394f032 7 *
550d5538 8 * Licensed under the GPL-2 or later.
1394f032
BW		 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>
1394f032 17#include <linux/tty.h>
856783b3 18#include <linux/pfn.h>
1394f032
BW		 19
20#include <linux/ext2_fs.h>
21#include <linux/cramfs_fs.h>
22#include <linux/romfs_fs.h>
23
3bebca2d 24#include <asm/cplb.h>
1394f032
BW		 25#include <asm/cacheflush.h>
26#include <asm/blackfin.h>
27#include <asm/cplbinit.h>
1754a5d9 28#include <asm/div64.h>
7adfb58f 29#include <asm/fixed_code.h>
ce3afa1c 30#include <asm/early_printk.h>
1394f032 31
6cda2e90
MH		 32static DEFINE_PER_CPU(struct cpu, cpu_devices);
33
a9c59c27 34u16 _bfin_swrst;
d45118b1 35EXPORT_SYMBOL(_bfin_swrst);
a9c59c27 36
1394f032
BW		 37unsigned long memory_start, memory_end, physical_mem_end;
38unsigned long reserved_mem_dcache_on;
39unsigned long reserved_mem_icache_on;
40EXPORT_SYMBOL(memory_start);
41EXPORT_SYMBOL(memory_end);
42EXPORT_SYMBOL(physical_mem_end);
43EXPORT_SYMBOL(_ramend);
44
45#ifdef CONFIG_MTD_UCLINUX
46unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
47unsigned long _ebss;
48EXPORT_SYMBOL(memory_mtd_end);
49EXPORT_SYMBOL(memory_mtd_start);
50EXPORT_SYMBOL(mtd_size);
51#endif
52
5e10b4a6 53char __initdata command_line[COMMAND_LINE_SIZE];
1394f032 54
856783b3
YL		 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
59struct 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 */
69struct change_member {
70 struct bfin_memmap_entry *pentry; /* pointer to original entry */
71 unsigned long long addr; /* address for this change point */
72};
73static struct change_member change_point_list[2*BFIN_MEMMAP_MAX] __initdata;
74static struct change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata;
75static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata;
76static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata;
77
1394f032
BW		 78void __init bf53x_cache_init(void)
79{
3bebca2d 80#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
1394f032
BW		 81 generate_cpl_tables();
82#endif
83
3bebca2d 84#ifdef CONFIG_BFIN_ICACHE
1394f032
BW		 85 bfin_icache_init();
86 printk(KERN_INFO "Instruction Cache Enabled\n");
87#endif
88
3bebca2d 89#ifdef CONFIG_BFIN_DCACHE
1394f032
BW		 90 bfin_dcache_init();
91 printk(KERN_INFO "Data Cache Enabled"
3bebca2d 92# if defined CONFIG_BFIN_WB
1394f032 93 " (write-back)"
3bebca2d 94# elif defined CONFIG_BFIN_WT
1394f032
BW		 95 " (write-through)"
96# endif
97 "\n");
98#endif
99}
100
52a07812 101void __init bf53x_relocate_l1_mem(void)
1394f032
BW		 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
856783b3
YL		 134/* add_memory_region to memmap */
135static 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 */
156static 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
302static 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
323static __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 == '$') {
335 start_at = memparse(arg+1, &arg);
336 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RESERVED);
337 }
338
339 return 0;
340}
341
1394f032
BW		 342/*
343 * Initial parsing of the command line. Currently, we support:
344 * - Controlling the linux memory size: mem=xxx[KMG]
345 * - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
346 * $ -> reserved memory is dcacheable
347 * # -> reserved memory is icacheable
856783b3
YL		 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 *
1394f032
BW		 352 */
353static __init void parse_cmdline_early(char *cmdline_p)
354{
355 char c = ' ', *to = cmdline_p;
356 unsigned int memsize;
357 for (;;) {
358 if (c == ' ') {
1394f032
BW		 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 }
ce3afa1c
RG		 381 } else if (!memcmp(to, "earlyprintk=", 12)) {
382 to += 12;
383 setup_early_printk(to);
856783b3
YL		 384 } else if (!memcmp(to, "memmap=", 7)) {
385 to += 7;
386 parse_memmap(to);
1394f032 387 }
1394f032
BW		 388 }
389 c = *(to++);
390 if (!c)
391 break;
392 }
393}
394
856783b3
YL		 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 */
409static __init void memory_setup(void)
1394f032 410{
c0eab3b7
MF		 411#ifdef CONFIG_MTD_UCLINUX
412 unsigned long mtd_phys = 0;
413#endif
414
856783b3 415 _rambase = (unsigned long)_stext;
b7627acc 416 _ramstart = (unsigned long)_end;
1394f032 417
856783b3
YL		 418 if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) {
419 console_init();
420 panic("DMA region exceeds memory limit: %lu.\n",
421 _ramend - _ramstart);
1aafd909 422 }
1394f032
BW		 423 memory_end = _ramend - DMA_UNCACHED_REGION;
424
b97b8a99
BS		 425#ifdef CONFIG_MPU
426 /* Round up to multiple of 4MB. */
427 memory_start = (_ramstart + 0x3fffff) & ~0x3fffff;
428#else
1394f032 429 memory_start = PAGE_ALIGN(_ramstart);
b97b8a99 430#endif
1394f032
BW		 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]));
3bebca2d 455# if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
1394f032
BW		 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 */
b7627acc 478 dma_memcpy((char *)memory_end, _end, mtd_size);
1394f032
BW		 479
480 memory_mtd_start = memory_end;
481 _ebss = memory_mtd_start; /* define _ebss for compatible */
482#endif /* CONFIG_MTD_UCLINUX */
483
3bebca2d 484#if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
1394f032
BW		 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
b97b8a99
BS		 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
1394f032 504#if !defined(CONFIG_MTD_UCLINUX)
856783b3
YL		 505 /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
506 memory_end -= SIZE_4K;
1394f032 507#endif
856783b3 508
1394f032
BW		 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
856783b3
YL		 514 printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
515 printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
516
b7627acc 517 printk(KERN_INFO "Memory map:\n"
8929ecf8 518 KERN_INFO " fixedcode = 0x%p-0x%p\n"
856783b3
YL		 519 KERN_INFO " text = 0x%p-0x%p\n"
520 KERN_INFO " rodata = 0x%p-0x%p\n"
b7627acc 521 KERN_INFO " bss = 0x%p-0x%p\n"
856783b3
YL		 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"
856783b3
YL		 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
8929ecf8
MF		 532 , (void *)FIXED_CODE_START, (void *)FIXED_CODE_END,
533 _stext, _etext,
856783b3 534 __start_rodata, __end_rodata,
b7627acc 535 __bss_start, __bss_stop,
856783b3
YL		 536 _sdata, _edata,
537 (void *)&init_thread_union,
538 (void *)((int)(&init_thread_union) + 0x2000),
b7627acc
MF		 539 __init_begin, __init_end,
540 (void *)_ramstart, (void *)memory_end
856783b3
YL		 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
2e8d7965
YL		 550/*
551 * Find the lowest, highest page frame number we have available
552 */
553void __init find_min_max_pfn(void)
554{
555 int i;
556
557 max_pfn = 0;
558 min_low_pfn = memory_end;
559
560 for (i = 0; i < bfin_memmap.nr_map; i++) {
561 unsigned long start, end;
562 /* RAM? */
563 if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
564 continue;
565 start = PFN_UP(bfin_memmap.map[i].addr);
566 end = PFN_DOWN(bfin_memmap.map[i].addr +
567 bfin_memmap.map[i].size);
568 if (start >= end)
569 continue;
570 if (end > max_pfn)
571 max_pfn = end;
572 if (start < min_low_pfn)
573 min_low_pfn = start;
574 }
575}
576
856783b3
YL		 577static __init void setup_bootmem_allocator(void)
578{
579 int bootmap_size;
580 int i;
2e8d7965 581 unsigned long start_pfn, end_pfn;
856783b3
YL		 582 unsigned long curr_pfn, last_pfn, size;
583
584 /* mark memory between memory_start and memory_end usable */
585 add_memory_region(memory_start,
586 memory_end - memory_start, BFIN_MEMMAP_RAM);
587 /* sanity check for overlap */
588 sanitize_memmap(bfin_memmap.map, &bfin_memmap.nr_map);
589 print_memory_map("boot memmap");
590
2e8d7965
YL		 591 /* intialize globals in linux/bootmem.h */
592 find_min_max_pfn();
593 /* pfn of the last usable page frame */
594 if (max_pfn > memory_end >> PAGE_SHIFT)
595 max_pfn = memory_end >> PAGE_SHIFT;
596 /* pfn of last page frame directly mapped by kernel */
597 max_low_pfn = max_pfn;
598 /* pfn of the first usable page frame after kernel image*/
599 if (min_low_pfn < memory_start >> PAGE_SHIFT)
600 min_low_pfn = memory_start >> PAGE_SHIFT;
601
602 start_pfn = PAGE_OFFSET >> PAGE_SHIFT;
603 end_pfn = memory_end >> PAGE_SHIFT;
856783b3
YL		 604
605 /*
606 * give all the memory to the bootmap allocator, tell it to put the
607 * boot mem_map at the start of memory.
608 */
609 bootmap_size = init_bootmem_node(NODE_DATA(0),
610 memory_start >> PAGE_SHIFT, /* map goes here */
2e8d7965 611 start_pfn, end_pfn);
856783b3
YL		 612
613 /* register the memmap regions with the bootmem allocator */
614 for (i = 0; i < bfin_memmap.nr_map; i++) {
615 /*
616 * Reserve usable memory
617 */
618 if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
619 continue;
620 /*
621 * We are rounding up the start address of usable memory:
622 */
623 curr_pfn = PFN_UP(bfin_memmap.map[i].addr);
2e8d7965 624 if (curr_pfn >= end_pfn)
856783b3
YL		 625 continue;
626 /*
627 * ... and at the end of the usable range downwards:
628 */
629 last_pfn = PFN_DOWN(bfin_memmap.map[i].addr +
630 bfin_memmap.map[i].size);
631
2e8d7965
YL		 632 if (last_pfn > end_pfn)
633 last_pfn = end_pfn;
856783b3
YL		 634
635 /*
636 * .. finally, did all the rounding and playing
637 * around just make the area go away?
638 */
639 if (last_pfn <= curr_pfn)
640 continue;
641
642 size = last_pfn - curr_pfn;
643 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
644 }
645
646 /* reserve memory before memory_start, including bootmap */
647 reserve_bootmem(PAGE_OFFSET,
648 memory_start + bootmap_size + PAGE_SIZE - 1 - PAGE_OFFSET,
649 BOOTMEM_DEFAULT);
650}
651
652void __init setup_arch(char **cmdline_p)
653{
654 unsigned long l1_length, sclk, cclk;
856783b3
YL		 655
656#ifdef CONFIG_DUMMY_CONSOLE
657 conswitchp = &dummy_con;
658#endif
659
660#if defined(CONFIG_CMDLINE_BOOL)
661 strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
662 command_line[sizeof(command_line) - 1] = 0;
663#endif
664
665 /* Keep a copy of command line */
666 *cmdline_p = &command_line[0];
667 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
668 boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
669
670 /* setup memory defaults from the user config */
671 physical_mem_end = 0;
672 _ramend = CONFIG_MEM_SIZE * 1024 * 1024;
673
674 memset(&bfin_memmap, 0, sizeof(bfin_memmap));
675
676 parse_cmdline_early(&command_line[0]);
677
678 if (physical_mem_end == 0)
679 physical_mem_end = _ramend;
680
681 memory_setup();
682
683 cclk = get_cclk();
684 sclk = get_sclk();
685
686#if !defined(CONFIG_BFIN_KERNEL_CLOCK)
687 if (ANOMALY_05000273 && cclk == sclk)
688 panic("ANOMALY 05000273, SCLK can not be same as CCLK");
689#endif
690
691#ifdef BF561_FAMILY
692 if (ANOMALY_05000266) {
693 bfin_read_IMDMA_D0_IRQ_STATUS();
694 bfin_read_IMDMA_D1_IRQ_STATUS();
695 }
696#endif
697 printk(KERN_INFO "Hardware Trace ");
698 if (bfin_read_TBUFCTL() & 0x1)
699 printk("Active ");
700 else
701 printk("Off ");
702 if (bfin_read_TBUFCTL() & 0x2)
703 printk("and Enabled\n");
704 else
705 printk("and Disabled\n");
706
707#if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
708 /* we need to initialize the Flashrom device here since we might
709 * do things with flash early on in the boot
710 */
711 flash_probe();
712#endif
713
7728ec33
RG		 714 _bfin_swrst = bfin_read_SWRST();
715
716 if (_bfin_swrst & RESET_DOUBLE)
717 printk(KERN_INFO "Recovering from Double Fault event\n");
718 else if (_bfin_swrst & RESET_WDOG)
719 printk(KERN_INFO "Recovering from Watchdog event\n");
720 else if (_bfin_swrst & RESET_SOFTWARE)
721 printk(KERN_NOTICE "Reset caused by Software reset\n");
722
550d5538 723 printk(KERN_INFO "Blackfin support (C) 2004-2008 Analog Devices, Inc.\n");
de3025f4
JZ		 724 if (bfin_compiled_revid() == 0xffff)
725 printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
726 else if (bfin_compiled_revid() == -1)
727 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
728 else
729 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
730 if (bfin_revid() != bfin_compiled_revid()) {
731 if (bfin_compiled_revid() == -1)
732 printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
733 bfin_revid());
734 else if (bfin_compiled_revid() != 0xffff)
735 printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
736 bfin_compiled_revid(), bfin_revid());
737 }
1394f032
BW		 738 if (bfin_revid() < SUPPORTED_REVID)
739 printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
740 CPU, bfin_revid());
741 printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
742
b5c0e2e8 743 printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
1394f032
BW		 744 cclk / 1000000, sclk / 1000000);
745
1aafd909 746 if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
1394f032 747 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
1394f032 748
856783b3 749 setup_bootmem_allocator();
1394f032 750
1394f032
BW		 751 paging_init();
752
753 /* check the size of the l1 area */
754 l1_length = _etext_l1 - _stext_l1;
755 if (l1_length > L1_CODE_LENGTH)
34e0fc89 756 panic("L1 code memory overflow\n");
1394f032
BW		 757
758 l1_length = _ebss_l1 - _sdata_l1;
759 if (l1_length > L1_DATA_A_LENGTH)
34e0fc89 760 panic("L1 data memory overflow\n");
1394f032 761
7adfb58f
BS		 762 /* Copy atomic sequences to their fixed location, and sanity check that
763 these locations are the ones that we advertise to userspace. */
764 memcpy((void *)FIXED_CODE_START, &fixed_code_start,
765 FIXED_CODE_END - FIXED_CODE_START);
766 BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
767 != SIGRETURN_STUB - FIXED_CODE_START);
768 BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
769 != ATOMIC_XCHG32 - FIXED_CODE_START);
770 BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
771 != ATOMIC_CAS32 - FIXED_CODE_START);
772 BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
773 != ATOMIC_ADD32 - FIXED_CODE_START);
774 BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
775 != ATOMIC_SUB32 - FIXED_CODE_START);
776 BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
777 != ATOMIC_IOR32 - FIXED_CODE_START);
778 BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
779 != ATOMIC_AND32 - FIXED_CODE_START);
780 BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
781 != ATOMIC_XOR32 - FIXED_CODE_START);
9f336a53
RG		 782 BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
783 != SAFE_USER_INSTRUCTION - FIXED_CODE_START);
29440a2b 784
8be80ed3 785 init_exception_vectors();
29440a2b 786 bf53x_cache_init();
1394f032
BW		 787}
788
1394f032
BW		 789static int __init topology_init(void)
790{
6cda2e90
MH		 791 int cpu;
792
793 for_each_possible_cpu(cpu) {
794 struct cpu *c = &per_cpu(cpu_devices, cpu);
795
796 register_cpu(c, cpu);
797 }
798
1394f032 799 return 0;
1394f032
BW		 800}
801
802subsys_initcall(topology_init);
803
52a07812 804static u_long get_vco(void)
1394f032
BW		 805{
806 u_long msel;
807 u_long vco;
808
809 msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
810 if (0 == msel)
811 msel = 64;
812
813 vco = CONFIG_CLKIN_HZ;
814 vco >>= (1 & bfin_read_PLL_CTL()); /* DF bit */
815 vco = msel * vco;
816 return vco;
817}
818
2f6cf7bf 819/* Get the Core clock */
1394f032
BW		 820u_long get_cclk(void)
821{
822 u_long csel, ssel;
823 if (bfin_read_PLL_STAT() & 0x1)
824 return CONFIG_CLKIN_HZ;
825
826 ssel = bfin_read_PLL_DIV();
827 csel = ((ssel >> 4) & 0x03);
828 ssel &= 0xf;
829 if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
830 return get_vco() / ssel;
831 return get_vco() >> csel;
832}
1394f032
BW		 833EXPORT_SYMBOL(get_cclk);
834
835/* Get the System clock */
836u_long get_sclk(void)
837{
838 u_long ssel;
839
840 if (bfin_read_PLL_STAT() & 0x1)
841 return CONFIG_CLKIN_HZ;
842
843 ssel = (bfin_read_PLL_DIV() & 0xf);
844 if (0 == ssel) {
845 printk(KERN_WARNING "Invalid System Clock\n");
846 ssel = 1;
847 }
848
849 return get_vco() / ssel;
850}
1394f032
BW		 851EXPORT_SYMBOL(get_sclk);
852
2f6cf7bf
MF		 853unsigned long sclk_to_usecs(unsigned long sclk)
854{
1754a5d9
MF		 855 u64 tmp = USEC_PER_SEC * (u64)sclk;
856 do_div(tmp, get_sclk());
857 return tmp;
2f6cf7bf
MF		 858}
859EXPORT_SYMBOL(sclk_to_usecs);
860
861unsigned long usecs_to_sclk(unsigned long usecs)
862{
1754a5d9
MF		 863 u64 tmp = get_sclk() * (u64)usecs;
864 do_div(tmp, USEC_PER_SEC);
865 return tmp;
2f6cf7bf
MF		 866}
867EXPORT_SYMBOL(usecs_to_sclk);
868
1394f032
BW		 869/*
870 * Get CPU information for use by the procfs.
871 */
872static int show_cpuinfo(struct seq_file *m, void *v)
873{
066954a3 874 char *cpu, *mmu, *fpu, *vendor, *cache;
1394f032
BW		 875 uint32_t revid;
876
877 u_long cclk = 0, sclk = 0;
878 u_int dcache_size = 0, dsup_banks = 0;
879
880 cpu = CPU;
881 mmu = "none";
882 fpu = "none";
883 revid = bfin_revid();
1394f032
BW		 884
885 cclk = get_cclk();
886 sclk = get_sclk();
887
73b0c0b0 888 switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
066954a3
MF		 889 case 0xca:
890 vendor = "Analog Devices";
73b0c0b0
RG		 891 break;
892 default:
066954a3
MF		 893 vendor = "unknown";
894 break;
73b0c0b0 895 }
1394f032 896
73b0c0b0
RG		 897 seq_printf(m, "processor\t: %d\n"
898 "vendor_id\t: %s\n"
899 "cpu family\t: 0x%x\n"
900 "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK)\n"
901 "stepping\t: %d\n",
902 0,
903 vendor,
904 (bfin_read_CHIPID() & CHIPID_FAMILY),
905 cpu, cclk/1000000, sclk/1000000,
906 revid);
907
908 seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
909 cclk/1000000, cclk%1000000,
910 sclk/1000000, sclk%1000000);
911 seq_printf(m, "bogomips\t: %lu.%02lu\n"
912 "Calibration\t: %lu loops\n",
913 (loops_per_jiffy * HZ) / 500000,
914 ((loops_per_jiffy * HZ) / 5000) % 100,
915 (loops_per_jiffy * HZ));
916
917 /* Check Cache configutation */
1f83b8f1
MF		 918 switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
919 case ACACHE_BSRAM:
066954a3 920 cache = "dbank-A/B\t: cache/sram";
1f83b8f1
MF		 921 dcache_size = 16;
922 dsup_banks = 1;
923 break;
924 case ACACHE_BCACHE:
066954a3 925 cache = "dbank-A/B\t: cache/cache";
1f83b8f1
MF		 926 dcache_size = 32;
927 dsup_banks = 2;
928 break;
929 case ASRAM_BSRAM:
066954a3 930 cache = "dbank-A/B\t: sram/sram";
1f83b8f1
MF		 931 dcache_size = 0;
932 dsup_banks = 0;
933 break;
934 default:
066954a3 935 cache = "unknown";
73b0c0b0
RG		 936 dcache_size = 0;
937 dsup_banks = 0;
1394f032
BW		 938 break;
939 }
940
73b0c0b0
RG		 941 /* Is it turned on? */
942 if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
943 dcache_size = 0;
1394f032 944
73b0c0b0
RG		 945 seq_printf(m, "cache size\t: %d KB(L1 icache) "
946 "%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
947 BFIN_ICACHESIZE / 1024, dcache_size,
948#if defined CONFIG_BFIN_WB
949 "wb"
950#elif defined CONFIG_BFIN_WT
951 "wt"
952#endif
da27abb7 953 "", 0);
73b0c0b0
RG		 954
955 seq_printf(m, "%s\n", cache);
956
957 seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
3bebca2d 958 BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
1394f032 959 seq_printf(m,
73b0c0b0 960 "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
3bebca2d
RG		 961 dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
962 BFIN_DLINES);
963#ifdef CONFIG_BFIN_ICACHE_LOCK
1394f032
BW		 964 switch (read_iloc()) {
965 case WAY0_L:
966 seq_printf(m, "Way0 Locked-Down\n");
967 break;
968 case WAY1_L:
969 seq_printf(m, "Way1 Locked-Down\n");
970 break;
971 case WAY01_L:
972 seq_printf(m, "Way0,Way1 Locked-Down\n");
973 break;
974 case WAY2_L:
975 seq_printf(m, "Way2 Locked-Down\n");
976 break;
977 case WAY02_L:
978 seq_printf(m, "Way0,Way2 Locked-Down\n");
979 break;
980 case WAY12_L:
981 seq_printf(m, "Way1,Way2 Locked-Down\n");
982 break;
983 case WAY012_L:
984 seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
985 break;
986 case WAY3_L:
987 seq_printf(m, "Way3 Locked-Down\n");
988 break;
989 case WAY03_L:
990 seq_printf(m, "Way0,Way3 Locked-Down\n");
991 break;
992 case WAY13_L:
993 seq_printf(m, "Way1,Way3 Locked-Down\n");
994 break;
995 case WAY013_L:
996 seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
997 break;
998 case WAY32_L:
999 seq_printf(m, "Way3,Way2 Locked-Down\n");
1000 break;
1001 case WAY320_L:
1002 seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
1003 break;
1004 case WAY321_L:
1005 seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
1006 break;
1007 case WAYALL_L:
1008 seq_printf(m, "All Ways are locked\n");
1009 break;
1010 default:
1011 seq_printf(m, "No Ways are locked\n");
1012 }
1013#endif
73b0c0b0 1014
066954a3 1015 seq_printf(m, "board name\t: %s\n", bfin_board_name);
73b0c0b0
RG		 1016 seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
1017 physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
1018 seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
1019 ((int)memory_end - (int)_stext) >> 10,
1020 _stext,
1021 (void *)memory_end);
1022
1394f032
BW		 1023 return 0;
1024}
1025
1026static void *c_start(struct seq_file *m, loff_t *pos)
1027{
1028 return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
1029}
1030
1031static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1032{
1033 ++*pos;
1034 return c_start(m, pos);
1035}
1036
1037static void c_stop(struct seq_file *m, void *v)
1038{
1039}
1040
03a44825 1041const struct seq_operations cpuinfo_op = {
1394f032
BW		 1042 .start = c_start,
1043 .next = c_next,
1044 .stop = c_stop,
1045 .show = show_cpuinfo,
1046};
1047
5e10b4a6 1048void __init cmdline_init(const char *r0)
1394f032
BW		 1049{
1050 if (r0)
52a07812 1051 strncpy(command_line, r0, COMMAND_LINE_SIZE);
1394f032 1052}
Linux kernel - Deliverables
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