[Blackfin] arch: Fix BUG - Enable ISP1362 driver to work ok with BF561
[linux-2.6.git] / arch / blackfin / kernel / setup.c
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>
36 #include <linux/tty.h>
37 #include <linux/pfn.h>
38
39 #include <linux/ext2_fs.h>
40 #include <linux/cramfs_fs.h>
41 #include <linux/romfs_fs.h>
42
43 #include <asm/cplb.h>
44 #include <asm/cacheflush.h>
45 #include <asm/blackfin.h>
46 #include <asm/cplbinit.h>
47 #include <asm/div64.h>
48 #include <asm/fixed_code.h>
49 #include <asm/early_printk.h>
50
51 static DEFINE_PER_CPU(struct cpu, cpu_devices);
52
53 u16 _bfin_swrst;
54
55 unsigned long memory_start, memory_end, physical_mem_end;
56 unsigned long reserved_mem_dcache_on;
57 unsigned long reserved_mem_icache_on;
58 EXPORT_SYMBOL(memory_start);
59 EXPORT_SYMBOL(memory_end);
60 EXPORT_SYMBOL(physical_mem_end);
61 EXPORT_SYMBOL(_ramend);
62
63 #ifdef CONFIG_MTD_UCLINUX
64 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
65 unsigned long _ebss;
66 EXPORT_SYMBOL(memory_mtd_end);
67 EXPORT_SYMBOL(memory_mtd_start);
68 EXPORT_SYMBOL(mtd_size);
69 #endif
70
71 char __initdata command_line[COMMAND_LINE_SIZE];
72
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
77 struct 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 */
87 struct change_member {
88         struct bfin_memmap_entry *pentry; /* pointer to original entry */
89         unsigned long long addr; /* address for this change point */
90 };
91 static struct change_member change_point_list[2*BFIN_MEMMAP_MAX] __initdata;
92 static struct change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata;
93 static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata;
94 static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata;
95
96 void __init bf53x_cache_init(void)
97 {
98 #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
99         generate_cpl_tables();
100 #endif
101
102 #ifdef CONFIG_BFIN_ICACHE
103         bfin_icache_init();
104         printk(KERN_INFO "Instruction Cache Enabled\n");
105 #endif
106
107 #ifdef CONFIG_BFIN_DCACHE
108         bfin_dcache_init();
109         printk(KERN_INFO "Data Cache Enabled"
110 # if defined CONFIG_BFIN_WB
111                 " (write-back)"
112 # elif defined CONFIG_BFIN_WT
113                 " (write-through)"
114 # endif
115                 "\n");
116 #endif
117 }
118
119 void __init bf53x_relocate_l1_mem(void)
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
152 /* add_memory_region to memmap */
153 static 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  */
174 static 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
320 static 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
341 static __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 == '$') {
353                 start_at = memparse(arg+1, &arg);
354                 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RESERVED);
355         }
356
357         return 0;
358 }
359
360 /*
361  * Initial parsing of the command line.  Currently, we support:
362  *  - Controlling the linux memory size: mem=xxx[KMG]
363  *  - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
364  *       $ -> reserved memory is dcacheable
365  *       # -> reserved memory is icacheable
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  *
370  */
371 static __init void parse_cmdline_early(char *cmdline_p)
372 {
373         char c = ' ', *to = cmdline_p;
374         unsigned int memsize;
375         for (;;) {
376                 if (c == ' ') {
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                                 }
399                         } else if (!memcmp(to, "earlyprintk=", 12)) {
400                                 to += 12;
401                                 setup_early_printk(to);
402                         } else if (!memcmp(to, "memmap=", 7)) {
403                                 to += 7;
404                                 parse_memmap(to);
405                         }
406                 }
407                 c = *(to++);
408                 if (!c)
409                         break;
410         }
411 }
412
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  */
427 static __init void  memory_setup(void)
428 {
429         _rambase = (unsigned long)_stext;
430         _ramstart = (unsigned long)__bss_stop;
431
432         if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) {
433                 console_init();
434                 panic("DMA region exceeds memory limit: %lu.\n",
435                         _ramend - _ramstart);
436         }
437         memory_end = _ramend - DMA_UNCACHED_REGION;
438
439 #ifdef CONFIG_MPU
440         /* Round up to multiple of 4MB.  */
441         memory_start = (_ramstart + 0x3fffff) & ~0x3fffff;
442 #else
443         memory_start = PAGE_ALIGN(_ramstart);
444 #endif
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]));
469 #  if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
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 */
492         dma_memcpy((char *)memory_end, __bss_stop, mtd_size);
493
494         memory_mtd_start = memory_end;
495         _ebss = memory_mtd_start;       /* define _ebss for compatible */
496 #endif                          /* CONFIG_MTD_UCLINUX */
497
498 #if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
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
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
518 #if !defined(CONFIG_MTD_UCLINUX)
519         /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
520         memory_end -= SIZE_4K;
521 #endif
522
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
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
562 static __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
626 void __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
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
700         printk(KERN_INFO "Blackfin support (C) 2004-2007 Analog Devices, Inc.\n");
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         }
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
720         printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
721                cclk / 1000000,  sclk / 1000000);
722
723         if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
724                 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
725
726         setup_bootmem_allocator();
727
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)
733                 panic("L1 code memory overflow\n");
734
735         l1_length = _ebss_l1 - _sdata_l1;
736         if (l1_length > L1_DATA_A_LENGTH)
737                 panic("L1 data memory overflow\n");
738
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);
759         BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
760                 != SAFE_USER_INSTRUCTION - FIXED_CODE_START);
761
762         init_exception_vectors();
763         bf53x_cache_init();
764 }
765
766 static int __init topology_init(void)
767 {
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
776         return 0;
777 }
778
779 subsys_initcall(topology_init);
780
781 static u_long get_vco(void)
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
796 /* Get the Core clock */
797 u_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 }
810 EXPORT_SYMBOL(get_cclk);
811
812 /* Get the System clock */
813 u_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 }
828 EXPORT_SYMBOL(get_sclk);
829
830 unsigned long sclk_to_usecs(unsigned long sclk)
831 {
832         u64 tmp = USEC_PER_SEC * (u64)sclk;
833         do_div(tmp, get_sclk());
834         return tmp;
835 }
836 EXPORT_SYMBOL(sclk_to_usecs);
837
838 unsigned long usecs_to_sclk(unsigned long usecs)
839 {
840         u64 tmp = get_sclk() * (u64)usecs;
841         do_div(tmp, USEC_PER_SEC);
842         return tmp;
843 }
844 EXPORT_SYMBOL(usecs_to_sclk);
845
846 /*
847  *      Get CPU information for use by the procfs.
848  */
849 static int show_cpuinfo(struct seq_file *m, void *v)
850 {
851         char *cpu, *mmu, *fpu, *vendor, *cache;
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();
861
862         cclk = get_cclk();
863         sclk = get_sclk();
864
865         switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
866         case 0xca:
867                 vendor = "Analog Devices";
868                 break;
869         default:
870                 vendor = "unknown";
871                 break;
872         }
873
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 */
895         switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
896         case ACACHE_BSRAM:
897                 cache = "dbank-A/B\t: cache/sram";
898                 dcache_size = 16;
899                 dsup_banks = 1;
900                 break;
901         case ACACHE_BCACHE:
902                 cache = "dbank-A/B\t: cache/cache";
903                 dcache_size = 32;
904                 dsup_banks = 2;
905                 break;
906         case ASRAM_BSRAM:
907                 cache = "dbank-A/B\t: sram/sram";
908                 dcache_size = 0;
909                 dsup_banks = 0;
910                 break;
911         default:
912                 cache = "unknown";
913                 dcache_size = 0;
914                 dsup_banks = 0;
915                 break;
916         }
917
918         /* Is it turned on? */
919         if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
920                 dcache_size = 0;
921
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
930                 "", 0);
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",
935                    BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
936         seq_printf(m,
937                    "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
938                    dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
939                    BFIN_DLINES);
940 #ifdef CONFIG_BFIN_ICACHE_LOCK
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
991
992         seq_printf(m, "board name\t: %s\n", bfin_board_name);
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
1000         return 0;
1001 }
1002
1003 static void *c_start(struct seq_file *m, loff_t *pos)
1004 {
1005         return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
1006 }
1007
1008 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1009 {
1010         ++*pos;
1011         return c_start(m, pos);
1012 }
1013
1014 static void c_stop(struct seq_file *m, void *v)
1015 {
1016 }
1017
1018 const struct seq_operations cpuinfo_op = {
1019         .start = c_start,
1020         .next = c_next,
1021         .stop = c_stop,
1022         .show = show_cpuinfo,
1023 };
1024
1025 void __init cmdline_init(const char *r0)
1026 {
1027         if (r0)
1028                 strncpy(command_line, r0, COMMAND_LINE_SIZE);
1029 }