projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[Blackfin] arch: change the trace buffer control start/stop logic in the exception...
[deliverable/linux.git] / arch / blackfin / kernel / setup.c
CommitLineData
1394f032
BW		 1/*
2 * File: arch/blackfin/kernel/setup.c
3 * Based on:
4 * Author:
5 *
6 * Created:
7 * Description:
8 *
9 * Modified:
10 * Copyright 2004-2006 Analog Devices Inc.
11 *
12 * Bugs: Enter bugs at http://blackfin.uclinux.org/
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see the file COPYING, or write
26 * to the Free Software Foundation, Inc.,
27 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
28 */
29
30#include <linux/delay.h>
31#include <linux/console.h>
32#include <linux/bootmem.h>
33#include <linux/seq_file.h>
34#include <linux/cpu.h>
35#include <linux/module.h>
1394f032 36#include <linux/tty.h>
856783b3 37#include <linux/pfn.h>
1394f032
BW		 38
39#include <linux/ext2_fs.h>
40#include <linux/cramfs_fs.h>
41#include <linux/romfs_fs.h>
42
3bebca2d 43#include <asm/cplb.h>
1394f032
BW		 44#include <asm/cacheflush.h>
45#include <asm/blackfin.h>
46#include <asm/cplbinit.h>
1754a5d9 47#include <asm/div64.h>
7adfb58f 48#include <asm/fixed_code.h>
ce3afa1c 49#include <asm/early_printk.h>
1394f032 50
6cda2e90
MH		 51static DEFINE_PER_CPU(struct cpu, cpu_devices);
52
a9c59c27
MF		 53u16 _bfin_swrst;
54
1394f032
BW		 55unsigned long memory_start, memory_end, physical_mem_end;
56unsigned long reserved_mem_dcache_on;
57unsigned long reserved_mem_icache_on;
58EXPORT_SYMBOL(memory_start);
59EXPORT_SYMBOL(memory_end);
60EXPORT_SYMBOL(physical_mem_end);
61EXPORT_SYMBOL(_ramend);
62
63#ifdef CONFIG_MTD_UCLINUX
64unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
65unsigned long _ebss;
66EXPORT_SYMBOL(memory_mtd_end);
67EXPORT_SYMBOL(memory_mtd_start);
68EXPORT_SYMBOL(mtd_size);
69#endif
70
5e10b4a6 71char __initdata command_line[COMMAND_LINE_SIZE];
1394f032 72
856783b3
YL		 73/* boot memmap, for parsing "memmap=" */
74#define BFIN_MEMMAP_MAX 128 /* number of entries in bfin_memmap */
75#define BFIN_MEMMAP_RAM 1
76#define BFIN_MEMMAP_RESERVED 2
77struct bfin_memmap {
78 int nr_map;
79 struct bfin_memmap_entry {
80 unsigned long long addr; /* start of memory segment */
81 unsigned long long size;
82 unsigned long type;
83 } map[BFIN_MEMMAP_MAX];
84} bfin_memmap __initdata;
85
86/* for memmap sanitization */
87struct change_member {
88 struct bfin_memmap_entry *pentry; /* pointer to original entry */
89 unsigned long long addr; /* address for this change point */
90};
91static struct change_member change_point_list[2*BFIN_MEMMAP_MAX] __initdata;
92static struct change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata;
93static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata;
94static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata;
95
1394f032
BW		 96void __init bf53x_cache_init(void)
97{
3bebca2d 98#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
1394f032
BW		 99 generate_cpl_tables();
100#endif
101
3bebca2d 102#ifdef CONFIG_BFIN_ICACHE
1394f032
BW		 103 bfin_icache_init();
104 printk(KERN_INFO "Instruction Cache Enabled\n");
105#endif
106
3bebca2d 107#ifdef CONFIG_BFIN_DCACHE
1394f032
BW		 108 bfin_dcache_init();
109 printk(KERN_INFO "Data Cache Enabled"
3bebca2d 110# if defined CONFIG_BFIN_WB
1394f032 111 " (write-back)"
3bebca2d 112# elif defined CONFIG_BFIN_WT
1394f032
BW		 113 " (write-through)"
114# endif
115 "\n");
116#endif
117}
118
52a07812 119void __init bf53x_relocate_l1_mem(void)
1394f032
BW		 120{
121 unsigned long l1_code_length;
122 unsigned long l1_data_a_length;
123 unsigned long l1_data_b_length;
124
125 l1_code_length = _etext_l1 - _stext_l1;
126 if (l1_code_length > L1_CODE_LENGTH)
127 l1_code_length = L1_CODE_LENGTH;
128 /* cannot complain as printk is not available as yet.
129 * But we can continue booting and complain later!
130 */
131
132 /* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
133 dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);
134
135 l1_data_a_length = _ebss_l1 - _sdata_l1;
136 if (l1_data_a_length > L1_DATA_A_LENGTH)
137 l1_data_a_length = L1_DATA_A_LENGTH;
138
139 /* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */
140 dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);
141
142 l1_data_b_length = _ebss_b_l1 - _sdata_b_l1;
143 if (l1_data_b_length > L1_DATA_B_LENGTH)
144 l1_data_b_length = L1_DATA_B_LENGTH;
145
146 /* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */
147 dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
148 l1_data_a_length, l1_data_b_length);
149
150}
151
856783b3
YL		 152/* add_memory_region to memmap */
153static void __init add_memory_region(unsigned long long start,
154 unsigned long long size, int type)
155{
156 int i;
157
158 i = bfin_memmap.nr_map;
159
160 if (i == BFIN_MEMMAP_MAX) {
161 printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
162 return;
163 }
164
165 bfin_memmap.map[i].addr = start;
166 bfin_memmap.map[i].size = size;
167 bfin_memmap.map[i].type = type;
168 bfin_memmap.nr_map++;
169}
170
171/*
172 * Sanitize the boot memmap, removing overlaps.
173 */
174static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
175{
176 struct change_member *change_tmp;
177 unsigned long current_type, last_type;
178 unsigned long long last_addr;
179 int chgidx, still_changing;
180 int overlap_entries;
181 int new_entry;
182 int old_nr, new_nr, chg_nr;
183 int i;
184
185 /*
186 Visually we're performing the following (1,2,3,4 = memory types)
187
188 Sample memory map (w/overlaps):
189 ____22__________________
190 ______________________4_
191 ____1111________________
192 _44_____________________
193 11111111________________
194 ____________________33__
195 ___________44___________
196 __________33333_________
197 ______________22________
198 ___________________2222_
199 _________111111111______
200 _____________________11_
201 _________________4______
202
203 Sanitized equivalent (no overlap):
204 1_______________________
205 _44_____________________
206 ___1____________________
207 ____22__________________
208 ______11________________
209 _________1______________
210 __________3_____________
211 ___________44___________
212 _____________33_________
213 _______________2________
214 ________________1_______
215 _________________4______
216 ___________________2____
217 ____________________33__
218 ______________________4_
219 */
220 /* if there's only one memory region, don't bother */
221 if (*pnr_map < 2)
222 return -1;
223
224 old_nr = *pnr_map;
225
226 /* bail out if we find any unreasonable addresses in memmap */
227 for (i = 0; i < old_nr; i++)
228 if (map[i].addr + map[i].size < map[i].addr)
229 return -1;
230
231 /* create pointers for initial change-point information (for sorting) */
232 for (i = 0; i < 2*old_nr; i++)
233 change_point[i] = &change_point_list[i];
234
235 /* record all known change-points (starting and ending addresses),
236 omitting those that are for empty memory regions */
237 chgidx = 0;
238 for (i = 0; i < old_nr; i++) {
239 if (map[i].size != 0) {
240 change_point[chgidx]->addr = map[i].addr;
241 change_point[chgidx++]->pentry = &map[i];
242 change_point[chgidx]->addr = map[i].addr + map[i].size;
243 change_point[chgidx++]->pentry = &map[i];
244 }
245 }
246 chg_nr = chgidx; /* true number of change-points */
247
248 /* sort change-point list by memory addresses (low -> high) */
249 still_changing = 1;
250 while (still_changing) {
251 still_changing = 0;
252 for (i = 1; i < chg_nr; i++) {
253 /* if <current_addr> > <last_addr>, swap */
254 /* or, if current=<start_addr> & last=<end_addr>, swap */
255 if ((change_point[i]->addr < change_point[i-1]->addr) ||
256 ((change_point[i]->addr == change_point[i-1]->addr) &&
257 (change_point[i]->addr == change_point[i]->pentry->addr) &&
258 (change_point[i-1]->addr != change_point[i-1]->pentry->addr))
259 ) {
260 change_tmp = change_point[i];
261 change_point[i] = change_point[i-1];
262 change_point[i-1] = change_tmp;
263 still_changing = 1;
264 }
265 }
266 }
267
268 /* create a new memmap, removing overlaps */
269 overlap_entries = 0; /* number of entries in the overlap table */
270 new_entry = 0; /* index for creating new memmap entries */
271 last_type = 0; /* start with undefined memory type */
272 last_addr = 0; /* start with 0 as last starting address */
273 /* loop through change-points, determining affect on the new memmap */
274 for (chgidx = 0; chgidx < chg_nr; chgidx++) {
275 /* keep track of all overlapping memmap entries */
276 if (change_point[chgidx]->addr == change_point[chgidx]->pentry->addr) {
277 /* add map entry to overlap list (> 1 entry implies an overlap) */
278 overlap_list[overlap_entries++] = change_point[chgidx]->pentry;
279 } else {
280 /* remove entry from list (order independent, so swap with last) */
281 for (i = 0; i < overlap_entries; i++) {
282 if (overlap_list[i] == change_point[chgidx]->pentry)
283 overlap_list[i] = overlap_list[overlap_entries-1];
284 }
285 overlap_entries--;
286 }
287 /* if there are overlapping entries, decide which "type" to use */
288 /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
289 current_type = 0;
290 for (i = 0; i < overlap_entries; i++)
291 if (overlap_list[i]->type > current_type)
292 current_type = overlap_list[i]->type;
293 /* continue building up new memmap based on this information */
294 if (current_type != last_type) {
295 if (last_type != 0) {
296 new_map[new_entry].size =
297 change_point[chgidx]->addr - last_addr;
298 /* move forward only if the new size was non-zero */
299 if (new_map[new_entry].size != 0)
300 if (++new_entry >= BFIN_MEMMAP_MAX)
301 break; /* no more space left for new entries */
302 }
303 if (current_type != 0) {
304 new_map[new_entry].addr = change_point[chgidx]->addr;
305 new_map[new_entry].type = current_type;
306 last_addr = change_point[chgidx]->addr;
307 }
308 last_type = current_type;
309 }
310 }
311 new_nr = new_entry; /* retain count for new entries */
312
313 /* copy new mapping into original location */
314 memcpy(map, new_map, new_nr*sizeof(struct bfin_memmap_entry));
315 *pnr_map = new_nr;
316
317 return 0;
318}
319
320static void __init print_memory_map(char *who)
321{
322 int i;
323
324 for (i = 0; i < bfin_memmap.nr_map; i++) {
325 printk(KERN_DEBUG " %s: %016Lx - %016Lx ", who,
326 bfin_memmap.map[i].addr,
327 bfin_memmap.map[i].addr + bfin_memmap.map[i].size);
328 switch (bfin_memmap.map[i].type) {
329 case BFIN_MEMMAP_RAM:
330 printk("(usable)\n");
331 break;
332 case BFIN_MEMMAP_RESERVED:
333 printk("(reserved)\n");
334 break;
335 default: printk("type %lu\n", bfin_memmap.map[i].type);
336 break;
337 }
338 }
339}
340
341static __init int parse_memmap(char *arg)
342{
343 unsigned long long start_at, mem_size;
344
345 if (!arg)
346 return -EINVAL;
347
348 mem_size = memparse(arg, &arg);
349 if (*arg == '@') {
350 start_at = memparse(arg+1, &arg);
351 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RAM);
352 } else if (*arg == '$') {
353 start_at = memparse(arg+1, &arg);
354 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RESERVED);
355 }
356
357 return 0;
358}
359
1394f032
BW		 360/*
361 * Initial parsing of the command line. Currently, we support:
362 * - Controlling the linux memory size: mem=xxx[KMG]
363 * - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
364 * $ -> reserved memory is dcacheable
365 * # -> reserved memory is icacheable
856783b3
YL		 366 * - "memmap=XXX[KkmM][@][$]XXX[KkmM]" defines a memory region
367 * @ from <start> to <start>+<mem>, type RAM
368 * $ from <start> to <start>+<mem>, type RESERVED
369 *
1394f032
BW		 370 */
371static __init void parse_cmdline_early(char *cmdline_p)
372{
373 char c = ' ', *to = cmdline_p;
374 unsigned int memsize;
375 for (;;) {
376 if (c == ' ') {
1394f032
BW		 377 if (!memcmp(to, "mem=", 4)) {
378 to += 4;
379 memsize = memparse(to, &to);
380 if (memsize)
381 _ramend = memsize;
382
383 } else if (!memcmp(to, "max_mem=", 8)) {
384 to += 8;
385 memsize = memparse(to, &to);
386 if (memsize) {
387 physical_mem_end = memsize;
388 if (*to != ' ') {
389 if (*to == '$'
390 || *(to + 1) == '$')
391 reserved_mem_dcache_on =
392 1;
393 if (*to == '#'
394 || *(to + 1) == '#')
395 reserved_mem_icache_on =
396 1;
397 }
398 }
ce3afa1c
RG		 399 } else if (!memcmp(to, "earlyprintk=", 12)) {
400 to += 12;
401 setup_early_printk(to);
856783b3
YL		 402 } else if (!memcmp(to, "memmap=", 7)) {
403 to += 7;
404 parse_memmap(to);
1394f032 405 }
1394f032
BW		 406 }
407 c = *(to++);
408 if (!c)
409 break;
410 }
411}
412
856783b3
YL		 413/*
414 * Setup memory defaults from user config.
415 * The physical memory layout looks like:
416 *
417 * [_rambase, _ramstart]: kernel image
418 * [memory_start, memory_end]: dynamic memory managed by kernel
419 * [memory_end, _ramend]: reserved memory
420 * [meory_mtd_start(memory_end),
421 * memory_mtd_start + mtd_size]: rootfs (if any)
422 * [_ramend - DMA_UNCACHED_REGION,
423 * _ramend]: uncached DMA region
424 * [_ramend, physical_mem_end]: memory not managed by kernel
425 *
426 */
427static __init void memory_setup(void)
1394f032 428{
856783b3
YL		 429 _rambase = (unsigned long)_stext;
430 _ramstart = (unsigned long)__bss_stop;
1394f032 431
856783b3
YL		 432 if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) {
433 console_init();
434 panic("DMA region exceeds memory limit: %lu.\n",
435 _ramend - _ramstart);
1aafd909 436 }
1394f032
BW		 437 memory_end = _ramend - DMA_UNCACHED_REGION;
438
b97b8a99
BS		 439#ifdef CONFIG_MPU
440 /* Round up to multiple of 4MB. */
441 memory_start = (_ramstart + 0x3fffff) & ~0x3fffff;
442#else
1394f032 443 memory_start = PAGE_ALIGN(_ramstart);
b97b8a99 444#endif
1394f032
BW		 445
446#if defined(CONFIG_MTD_UCLINUX)
447 /* generic memory mapped MTD driver */
448 memory_mtd_end = memory_end;
449
450 mtd_phys = _ramstart;
451 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
452
453# if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
454 if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
455 mtd_size =
456 PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
457# endif
458
459# if defined(CONFIG_CRAMFS)
460 if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
461 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
462# endif
463
464# if defined(CONFIG_ROMFS_FS)
465 if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
466 && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
467 mtd_size =
468 PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
3bebca2d 469# if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
1394f032
BW		 470 /* Due to a Hardware Anomaly we need to limit the size of usable
471 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
472 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
473 */
474# if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
475 if (memory_end >= 56 * 1024 * 1024)
476 memory_end = 56 * 1024 * 1024;
477# else
478 if (memory_end >= 60 * 1024 * 1024)
479 memory_end = 60 * 1024 * 1024;
480# endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
481# endif /* ANOMALY_05000263 */
482# endif /* CONFIG_ROMFS_FS */
483
484 memory_end -= mtd_size;
485
486 if (mtd_size == 0) {
487 console_init();
488 panic("Don't boot kernel without rootfs attached.\n");
489 }
490
491 /* Relocate MTD image to the top of memory after the uncached memory area */
af8a5af3 492 dma_memcpy((char *)memory_end, __bss_stop, mtd_size);
1394f032
BW		 493
494 memory_mtd_start = memory_end;
495 _ebss = memory_mtd_start; /* define _ebss for compatible */
496#endif /* CONFIG_MTD_UCLINUX */
497
3bebca2d 498#if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
1394f032
BW		 499 /* Due to a Hardware Anomaly we need to limit the size of usable
500 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
501 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
502 */
503#if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
504 if (memory_end >= 56 * 1024 * 1024)
505 memory_end = 56 * 1024 * 1024;
506#else
507 if (memory_end >= 60 * 1024 * 1024)
508 memory_end = 60 * 1024 * 1024;
509#endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
510 printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
511#endif /* ANOMALY_05000263 */
512
b97b8a99
BS		 513#ifdef CONFIG_MPU
514 page_mask_nelts = ((_ramend >> PAGE_SHIFT) + 31) / 32;
515 page_mask_order = get_order(3 * page_mask_nelts * sizeof(long));
516#endif
517
1394f032 518#if !defined(CONFIG_MTD_UCLINUX)
856783b3
YL		 519 /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
520 memory_end -= SIZE_4K;
1394f032 521#endif
856783b3 522
1394f032
BW		 523 init_mm.start_code = (unsigned long)_stext;
524 init_mm.end_code = (unsigned long)_etext;
525 init_mm.end_data = (unsigned long)_edata;
526 init_mm.brk = (unsigned long)0;
527
856783b3
YL		 528 printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
529 printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
530
531 printk( KERN_INFO "Memory map:\n"
532 KERN_INFO " text = 0x%p-0x%p\n"
533 KERN_INFO " rodata = 0x%p-0x%p\n"
534 KERN_INFO " data = 0x%p-0x%p\n"
535 KERN_INFO " stack = 0x%p-0x%p\n"
536 KERN_INFO " init = 0x%p-0x%p\n"
537 KERN_INFO " bss = 0x%p-0x%p\n"
538 KERN_INFO " available = 0x%p-0x%p\n"
539#ifdef CONFIG_MTD_UCLINUX
540 KERN_INFO " rootfs = 0x%p-0x%p\n"
541#endif
542#if DMA_UNCACHED_REGION > 0
543 KERN_INFO " DMA Zone = 0x%p-0x%p\n"
544#endif
545 , _stext, _etext,
546 __start_rodata, __end_rodata,
547 _sdata, _edata,
548 (void *)&init_thread_union,
549 (void *)((int)(&init_thread_union) + 0x2000),
550 __init_begin, __init_end,
551 __bss_start, __bss_stop,
552 (void *)_ramstart, (void *)memory_end
553#ifdef CONFIG_MTD_UCLINUX
554 , (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
555#endif
556#if DMA_UNCACHED_REGION > 0
557 , (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
558#endif
559 );
560}
561
562static __init void setup_bootmem_allocator(void)
563{
564 int bootmap_size;
565 int i;
566 unsigned long min_pfn, max_pfn;
567 unsigned long curr_pfn, last_pfn, size;
568
569 /* mark memory between memory_start and memory_end usable */
570 add_memory_region(memory_start,
571 memory_end - memory_start, BFIN_MEMMAP_RAM);
572 /* sanity check for overlap */
573 sanitize_memmap(bfin_memmap.map, &bfin_memmap.nr_map);
574 print_memory_map("boot memmap");
575
576 min_pfn = PAGE_OFFSET >> PAGE_SHIFT;
577 max_pfn = memory_end >> PAGE_SHIFT;
578
579 /*
580 * give all the memory to the bootmap allocator, tell it to put the
581 * boot mem_map at the start of memory.
582 */
583 bootmap_size = init_bootmem_node(NODE_DATA(0),
584 memory_start >> PAGE_SHIFT, /* map goes here */
585 min_pfn, max_pfn);
586
587 /* register the memmap regions with the bootmem allocator */
588 for (i = 0; i < bfin_memmap.nr_map; i++) {
589 /*
590 * Reserve usable memory
591 */
592 if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
593 continue;
594 /*
595 * We are rounding up the start address of usable memory:
596 */
597 curr_pfn = PFN_UP(bfin_memmap.map[i].addr);
598 if (curr_pfn >= max_pfn)
599 continue;
600 /*
601 * ... and at the end of the usable range downwards:
602 */
603 last_pfn = PFN_DOWN(bfin_memmap.map[i].addr +
604 bfin_memmap.map[i].size);
605
606 if (last_pfn > max_pfn)
607 last_pfn = max_pfn;
608
609 /*
610 * .. finally, did all the rounding and playing
611 * around just make the area go away?
612 */
613 if (last_pfn <= curr_pfn)
614 continue;
615
616 size = last_pfn - curr_pfn;
617 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
618 }
619
620 /* reserve memory before memory_start, including bootmap */
621 reserve_bootmem(PAGE_OFFSET,
622 memory_start + bootmap_size + PAGE_SIZE - 1 - PAGE_OFFSET,
623 BOOTMEM_DEFAULT);
624}
625
626void __init setup_arch(char **cmdline_p)
627{
628 unsigned long l1_length, sclk, cclk;
629#ifdef CONFIG_MTD_UCLINUX
630 unsigned long mtd_phys = 0;
631#endif
632
633#ifdef CONFIG_DUMMY_CONSOLE
634 conswitchp = &dummy_con;
635#endif
636
637#if defined(CONFIG_CMDLINE_BOOL)
638 strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
639 command_line[sizeof(command_line) - 1] = 0;
640#endif
641
642 /* Keep a copy of command line */
643 *cmdline_p = &command_line[0];
644 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
645 boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
646
647 /* setup memory defaults from the user config */
648 physical_mem_end = 0;
649 _ramend = CONFIG_MEM_SIZE * 1024 * 1024;
650
651 memset(&bfin_memmap, 0, sizeof(bfin_memmap));
652
653 parse_cmdline_early(&command_line[0]);
654
655 if (physical_mem_end == 0)
656 physical_mem_end = _ramend;
657
658 memory_setup();
659
660 cclk = get_cclk();
661 sclk = get_sclk();
662
663#if !defined(CONFIG_BFIN_KERNEL_CLOCK)
664 if (ANOMALY_05000273 && cclk == sclk)
665 panic("ANOMALY 05000273, SCLK can not be same as CCLK");
666#endif
667
668#ifdef BF561_FAMILY
669 if (ANOMALY_05000266) {
670 bfin_read_IMDMA_D0_IRQ_STATUS();
671 bfin_read_IMDMA_D1_IRQ_STATUS();
672 }
673#endif
674 printk(KERN_INFO "Hardware Trace ");
675 if (bfin_read_TBUFCTL() & 0x1)
676 printk("Active ");
677 else
678 printk("Off ");
679 if (bfin_read_TBUFCTL() & 0x2)
680 printk("and Enabled\n");
681 else
682 printk("and Disabled\n");
683
684#if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
685 /* we need to initialize the Flashrom device here since we might
686 * do things with flash early on in the boot
687 */
688 flash_probe();
689#endif
690
7728ec33
RG		 691 _bfin_swrst = bfin_read_SWRST();
692
693 if (_bfin_swrst & RESET_DOUBLE)
694 printk(KERN_INFO "Recovering from Double Fault event\n");
695 else if (_bfin_swrst & RESET_WDOG)
696 printk(KERN_INFO "Recovering from Watchdog event\n");
697 else if (_bfin_swrst & RESET_SOFTWARE)
698 printk(KERN_NOTICE "Reset caused by Software reset\n");
699
1394f032 700 printk(KERN_INFO "Blackfin support (C) 2004-2007 Analog Devices, Inc.\n");
de3025f4
JZ		 701 if (bfin_compiled_revid() == 0xffff)
702 printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
703 else if (bfin_compiled_revid() == -1)
704 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
705 else
706 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
707 if (bfin_revid() != bfin_compiled_revid()) {
708 if (bfin_compiled_revid() == -1)
709 printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
710 bfin_revid());
711 else if (bfin_compiled_revid() != 0xffff)
712 printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
713 bfin_compiled_revid(), bfin_revid());
714 }
1394f032
BW		 715 if (bfin_revid() < SUPPORTED_REVID)
716 printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
717 CPU, bfin_revid());
718 printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
719
b5c0e2e8 720 printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
1394f032
BW		 721 cclk / 1000000, sclk / 1000000);
722
1aafd909 723 if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
1394f032 724 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
1394f032 725
856783b3 726 setup_bootmem_allocator();
1394f032 727
1394f032
BW		 728 paging_init();
729
730 /* check the size of the l1 area */
731 l1_length = _etext_l1 - _stext_l1;
732 if (l1_length > L1_CODE_LENGTH)
34e0fc89 733 panic("L1 code memory overflow\n");
1394f032
BW		 734
735 l1_length = _ebss_l1 - _sdata_l1;
736 if (l1_length > L1_DATA_A_LENGTH)
34e0fc89 737 panic("L1 data memory overflow\n");
1394f032 738
7adfb58f
BS		 739 /* Copy atomic sequences to their fixed location, and sanity check that
740 these locations are the ones that we advertise to userspace. */
741 memcpy((void *)FIXED_CODE_START, &fixed_code_start,
742 FIXED_CODE_END - FIXED_CODE_START);
743 BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
744 != SIGRETURN_STUB - FIXED_CODE_START);
745 BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
746 != ATOMIC_XCHG32 - FIXED_CODE_START);
747 BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
748 != ATOMIC_CAS32 - FIXED_CODE_START);
749 BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
750 != ATOMIC_ADD32 - FIXED_CODE_START);
751 BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
752 != ATOMIC_SUB32 - FIXED_CODE_START);
753 BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
754 != ATOMIC_IOR32 - FIXED_CODE_START);
755 BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
756 != ATOMIC_AND32 - FIXED_CODE_START);
757 BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
758 != ATOMIC_XOR32 - FIXED_CODE_START);
9f336a53
RG		 759 BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
760 != SAFE_USER_INSTRUCTION - FIXED_CODE_START);
29440a2b 761
8be80ed3 762 init_exception_vectors();
29440a2b 763 bf53x_cache_init();
1394f032
BW		 764}
765
1394f032
BW		 766static int __init topology_init(void)
767{
6cda2e90
MH		 768 int cpu;
769
770 for_each_possible_cpu(cpu) {
771 struct cpu *c = &per_cpu(cpu_devices, cpu);
772
773 register_cpu(c, cpu);
774 }
775
1394f032 776 return 0;
1394f032
BW		 777}
778
779subsys_initcall(topology_init);
780
52a07812 781static u_long get_vco(void)
1394f032
BW		 782{
783 u_long msel;
784 u_long vco;
785
786 msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
787 if (0 == msel)
788 msel = 64;
789
790 vco = CONFIG_CLKIN_HZ;
791 vco >>= (1 & bfin_read_PLL_CTL()); /* DF bit */
792 vco = msel * vco;
793 return vco;
794}
795
2f6cf7bf 796/* Get the Core clock */
1394f032
BW		 797u_long get_cclk(void)
798{
799 u_long csel, ssel;
800 if (bfin_read_PLL_STAT() & 0x1)
801 return CONFIG_CLKIN_HZ;
802
803 ssel = bfin_read_PLL_DIV();
804 csel = ((ssel >> 4) & 0x03);
805 ssel &= 0xf;
806 if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
807 return get_vco() / ssel;
808 return get_vco() >> csel;
809}
1394f032
BW		 810EXPORT_SYMBOL(get_cclk);
811
812/* Get the System clock */
813u_long get_sclk(void)
814{
815 u_long ssel;
816
817 if (bfin_read_PLL_STAT() & 0x1)
818 return CONFIG_CLKIN_HZ;
819
820 ssel = (bfin_read_PLL_DIV() & 0xf);
821 if (0 == ssel) {
822 printk(KERN_WARNING "Invalid System Clock\n");
823 ssel = 1;
824 }
825
826 return get_vco() / ssel;
827}
1394f032
BW		 828EXPORT_SYMBOL(get_sclk);
829
2f6cf7bf
MF		 830unsigned long sclk_to_usecs(unsigned long sclk)
831{
1754a5d9
MF		 832 u64 tmp = USEC_PER_SEC * (u64)sclk;
833 do_div(tmp, get_sclk());
834 return tmp;
2f6cf7bf
MF		 835}
836EXPORT_SYMBOL(sclk_to_usecs);
837
838unsigned long usecs_to_sclk(unsigned long usecs)
839{
1754a5d9
MF		 840 u64 tmp = get_sclk() * (u64)usecs;
841 do_div(tmp, USEC_PER_SEC);
842 return tmp;
2f6cf7bf
MF		 843}
844EXPORT_SYMBOL(usecs_to_sclk);
845
1394f032
BW		 846/*
847 * Get CPU information for use by the procfs.
848 */
849static int show_cpuinfo(struct seq_file *m, void *v)
850{
066954a3 851 char *cpu, *mmu, *fpu, *vendor, *cache;
1394f032
BW		 852 uint32_t revid;
853
854 u_long cclk = 0, sclk = 0;
855 u_int dcache_size = 0, dsup_banks = 0;
856
857 cpu = CPU;
858 mmu = "none";
859 fpu = "none";
860 revid = bfin_revid();
1394f032
BW		 861
862 cclk = get_cclk();
863 sclk = get_sclk();
864
73b0c0b0 865 switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
066954a3
MF		 866 case 0xca:
867 vendor = "Analog Devices";
73b0c0b0
RG		 868 break;
869 default:
066954a3
MF		 870 vendor = "unknown";
871 break;
73b0c0b0 872 }
1394f032 873
73b0c0b0
RG		 874 seq_printf(m, "processor\t: %d\n"
875 "vendor_id\t: %s\n"
876 "cpu family\t: 0x%x\n"
877 "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK)\n"
878 "stepping\t: %d\n",
879 0,
880 vendor,
881 (bfin_read_CHIPID() & CHIPID_FAMILY),
882 cpu, cclk/1000000, sclk/1000000,
883 revid);
884
885 seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
886 cclk/1000000, cclk%1000000,
887 sclk/1000000, sclk%1000000);
888 seq_printf(m, "bogomips\t: %lu.%02lu\n"
889 "Calibration\t: %lu loops\n",
890 (loops_per_jiffy * HZ) / 500000,
891 ((loops_per_jiffy * HZ) / 5000) % 100,
892 (loops_per_jiffy * HZ));
893
894 /* Check Cache configutation */
1f83b8f1
MF		 895 switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
896 case ACACHE_BSRAM:
066954a3 897 cache = "dbank-A/B\t: cache/sram";
1f83b8f1
MF		 898 dcache_size = 16;
899 dsup_banks = 1;
900 break;
901 case ACACHE_BCACHE:
066954a3 902 cache = "dbank-A/B\t: cache/cache";
1f83b8f1
MF		 903 dcache_size = 32;
904 dsup_banks = 2;
905 break;
906 case ASRAM_BSRAM:
066954a3 907 cache = "dbank-A/B\t: sram/sram";
1f83b8f1
MF		 908 dcache_size = 0;
909 dsup_banks = 0;
910 break;
911 default:
066954a3 912 cache = "unknown";
73b0c0b0
RG		 913 dcache_size = 0;
914 dsup_banks = 0;
1394f032
BW		 915 break;
916 }
917
73b0c0b0
RG		 918 /* Is it turned on? */
919 if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
920 dcache_size = 0;
1394f032 921
73b0c0b0
RG		 922 seq_printf(m, "cache size\t: %d KB(L1 icache) "
923 "%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
924 BFIN_ICACHESIZE / 1024, dcache_size,
925#if defined CONFIG_BFIN_WB
926 "wb"
927#elif defined CONFIG_BFIN_WT
928 "wt"
929#endif
da27abb7 930 "", 0);
73b0c0b0
RG		 931
932 seq_printf(m, "%s\n", cache);
933
934 seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
3bebca2d 935 BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
1394f032 936 seq_printf(m,
73b0c0b0 937 "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
3bebca2d
RG		 938 dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
939 BFIN_DLINES);
940#ifdef CONFIG_BFIN_ICACHE_LOCK
1394f032
BW		 941 switch (read_iloc()) {
942 case WAY0_L:
943 seq_printf(m, "Way0 Locked-Down\n");
944 break;
945 case WAY1_L:
946 seq_printf(m, "Way1 Locked-Down\n");
947 break;
948 case WAY01_L:
949 seq_printf(m, "Way0,Way1 Locked-Down\n");
950 break;
951 case WAY2_L:
952 seq_printf(m, "Way2 Locked-Down\n");
953 break;
954 case WAY02_L:
955 seq_printf(m, "Way0,Way2 Locked-Down\n");
956 break;
957 case WAY12_L:
958 seq_printf(m, "Way1,Way2 Locked-Down\n");
959 break;
960 case WAY012_L:
961 seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
962 break;
963 case WAY3_L:
964 seq_printf(m, "Way3 Locked-Down\n");
965 break;
966 case WAY03_L:
967 seq_printf(m, "Way0,Way3 Locked-Down\n");
968 break;
969 case WAY13_L:
970 seq_printf(m, "Way1,Way3 Locked-Down\n");
971 break;
972 case WAY013_L:
973 seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
974 break;
975 case WAY32_L:
976 seq_printf(m, "Way3,Way2 Locked-Down\n");
977 break;
978 case WAY320_L:
979 seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
980 break;
981 case WAY321_L:
982 seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
983 break;
984 case WAYALL_L:
985 seq_printf(m, "All Ways are locked\n");
986 break;
987 default:
988 seq_printf(m, "No Ways are locked\n");
989 }
990#endif
73b0c0b0 991
066954a3 992 seq_printf(m, "board name\t: %s\n", bfin_board_name);
73b0c0b0
RG		 993 seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
994 physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
995 seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
996 ((int)memory_end - (int)_stext) >> 10,
997 _stext,
998 (void *)memory_end);
999
1394f032
BW		 1000 return 0;
1001}
1002
1003static void *c_start(struct seq_file *m, loff_t *pos)
1004{
1005 return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
1006}
1007
1008static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1009{
1010 ++*pos;
1011 return c_start(m, pos);
1012}
1013
1014static void c_stop(struct seq_file *m, void *v)
1015{
1016}
1017
03a44825 1018const struct seq_operations cpuinfo_op = {
1394f032
BW		 1019 .start = c_start,
1020 .next = c_next,
1021 .stop = c_stop,
1022 .show = show_cpuinfo,
1023};
1024
5e10b4a6 1025void __init cmdline_init(const char *r0)
1394f032
BW		 1026{
1027 if (r0)
52a07812 1028 strncpy(command_line, r0, COMMAND_LINE_SIZE);
1394f032 1029}
Linux kernel - Deliverables
This page took 0.15847 seconds and 5 git commands to generate.