Blackfin arch: rewrite dma_memcpy() and dma in/out functions
[linux-2.6.git] / arch / blackfin / kernel / setup.c
1 /*
2  * arch/blackfin/kernel/setup.c
3  *
4  * Copyright 2004-2006 Analog Devices Inc.
5  *
6  * Enter bugs at http://blackfin.uclinux.org/
7  *
8  * Licensed under the GPL-2 or later.
9  */
10
11 #include <linux/delay.h>
12 #include <linux/console.h>
13 #include <linux/bootmem.h>
14 #include <linux/seq_file.h>
15 #include <linux/cpu.h>
16 #include <linux/module.h>
17 #include <linux/tty.h>
18 #include <linux/pfn.h>
19
20 #include <linux/ext2_fs.h>
21 #include <linux/cramfs_fs.h>
22 #include <linux/romfs_fs.h>
23
24 #include <asm/cplb.h>
25 #include <asm/cacheflush.h>
26 #include <asm/blackfin.h>
27 #include <asm/cplbinit.h>
28 #include <asm/div64.h>
29 #include <asm/cpu.h>
30 #include <asm/fixed_code.h>
31 #include <asm/early_printk.h>
32
33 u16 _bfin_swrst;
34 EXPORT_SYMBOL(_bfin_swrst);
35
36 unsigned long memory_start, memory_end, physical_mem_end;
37 unsigned long _rambase, _ramstart, _ramend;
38 unsigned long reserved_mem_dcache_on;
39 unsigned long reserved_mem_icache_on;
40 EXPORT_SYMBOL(memory_start);
41 EXPORT_SYMBOL(memory_end);
42 EXPORT_SYMBOL(physical_mem_end);
43 EXPORT_SYMBOL(_ramend);
44 EXPORT_SYMBOL(reserved_mem_dcache_on);
45
46 #ifdef CONFIG_MTD_UCLINUX
47 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
48 unsigned long _ebss;
49 EXPORT_SYMBOL(memory_mtd_end);
50 EXPORT_SYMBOL(memory_mtd_start);
51 EXPORT_SYMBOL(mtd_size);
52 #endif
53
54 char __initdata command_line[COMMAND_LINE_SIZE];
55 void __initdata *init_retx, *init_saved_retx, *init_saved_seqstat,
56         *init_saved_icplb_fault_addr, *init_saved_dcplb_fault_addr;
57
58 /* boot memmap, for parsing "memmap=" */
59 #define BFIN_MEMMAP_MAX         128 /* number of entries in bfin_memmap */
60 #define BFIN_MEMMAP_RAM         1
61 #define BFIN_MEMMAP_RESERVED    2
62 struct bfin_memmap {
63         int nr_map;
64         struct bfin_memmap_entry {
65                 unsigned long long addr; /* start of memory segment */
66                 unsigned long long size;
67                 unsigned long type;
68         } map[BFIN_MEMMAP_MAX];
69 } bfin_memmap __initdata;
70
71 /* for memmap sanitization */
72 struct change_member {
73         struct bfin_memmap_entry *pentry; /* pointer to original entry */
74         unsigned long long addr; /* address for this change point */
75 };
76 static struct change_member change_point_list[2*BFIN_MEMMAP_MAX] __initdata;
77 static struct change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata;
78 static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata;
79 static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata;
80
81 DEFINE_PER_CPU(struct blackfin_cpudata, cpu_data);
82
83 #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
84 void __init generate_cplb_tables(void)
85 {
86         unsigned int cpu;
87
88         /* Generate per-CPU I&D CPLB tables */
89         for (cpu = 0; cpu < num_possible_cpus(); ++cpu)
90                 generate_cplb_tables_cpu(cpu);
91 }
92 #endif
93
94 void __cpuinit bfin_setup_caches(unsigned int cpu)
95 {
96 #ifdef CONFIG_BFIN_ICACHE
97 #ifdef CONFIG_MPU
98         bfin_icache_init(icplb_tbl[cpu]);
99 #else
100         bfin_icache_init(icplb_tables[cpu]);
101 #endif
102 #endif
103
104 #ifdef CONFIG_BFIN_DCACHE
105 #ifdef CONFIG_MPU
106         bfin_dcache_init(dcplb_tbl[cpu]);
107 #else
108         bfin_dcache_init(dcplb_tables[cpu]);
109 #endif
110 #endif
111
112         /*
113          * In cache coherence emulation mode, we need to have the
114          * D-cache enabled before running any atomic operation which
115          * might invove cache invalidation (i.e. spinlock, rwlock).
116          * So printk's are deferred until then.
117          */
118 #ifdef CONFIG_BFIN_ICACHE
119         printk(KERN_INFO "Instruction Cache Enabled for CPU%u\n", cpu);
120 #endif
121 #ifdef CONFIG_BFIN_DCACHE
122         printk(KERN_INFO "Data Cache Enabled for CPU%u"
123 # if defined CONFIG_BFIN_WB
124                 " (write-back)"
125 # elif defined CONFIG_BFIN_WT
126                 " (write-through)"
127 # endif
128                 "\n", cpu);
129 #endif
130 }
131
132 void __cpuinit bfin_setup_cpudata(unsigned int cpu)
133 {
134         struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, cpu);
135
136         cpudata->idle = current;
137         cpudata->loops_per_jiffy = loops_per_jiffy;
138         cpudata->imemctl = bfin_read_IMEM_CONTROL();
139         cpudata->dmemctl = bfin_read_DMEM_CONTROL();
140 }
141
142 void __init bfin_cache_init(void)
143 {
144 #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
145         generate_cplb_tables();
146 #endif
147         bfin_setup_caches(0);
148 }
149
150 void __init bfin_relocate_l1_mem(void)
151 {
152         unsigned long l1_code_length;
153         unsigned long l1_data_a_length;
154         unsigned long l1_data_b_length;
155         unsigned long l2_length;
156
157         blackfin_dma_early_init();
158
159         l1_code_length = _etext_l1 - _stext_l1;
160         if (l1_code_length > L1_CODE_LENGTH)
161                 panic("L1 Instruction SRAM Overflow\n");
162         /* cannot complain as printk is not available as yet.
163          * But we can continue booting and complain later!
164          */
165
166         /* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
167         dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);
168
169         l1_data_a_length = _sbss_l1 - _sdata_l1;
170         if (l1_data_a_length > L1_DATA_A_LENGTH)
171                 panic("L1 Data SRAM Bank A Overflow\n");
172
173         /* Copy _sdata_l1 to _sbss_l1 to L1 data bank A SRAM */
174         dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);
175
176         l1_data_b_length = _sbss_b_l1 - _sdata_b_l1;
177         if (l1_data_b_length > L1_DATA_B_LENGTH)
178                 panic("L1 Data SRAM Bank B Overflow\n");
179
180         /* Copy _sdata_b_l1 to _sbss_b_l1 to L1 data bank B SRAM */
181         dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
182                         l1_data_a_length, l1_data_b_length);
183
184         if (L2_LENGTH != 0) {
185                 l2_length = _sbss_l2 - _stext_l2;
186                 if (l2_length > L2_LENGTH)
187                         panic("L2 SRAM Overflow\n");
188
189                 /* Copy _stext_l2 to _edata_l2 to L2 SRAM */
190                 dma_memcpy(_stext_l2, _l2_lma_start, l2_length);
191         }
192 }
193
194 /* add_memory_region to memmap */
195 static void __init add_memory_region(unsigned long long start,
196                               unsigned long long size, int type)
197 {
198         int i;
199
200         i = bfin_memmap.nr_map;
201
202         if (i == BFIN_MEMMAP_MAX) {
203                 printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
204                 return;
205         }
206
207         bfin_memmap.map[i].addr = start;
208         bfin_memmap.map[i].size = size;
209         bfin_memmap.map[i].type = type;
210         bfin_memmap.nr_map++;
211 }
212
213 /*
214  * Sanitize the boot memmap, removing overlaps.
215  */
216 static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
217 {
218         struct change_member *change_tmp;
219         unsigned long current_type, last_type;
220         unsigned long long last_addr;
221         int chgidx, still_changing;
222         int overlap_entries;
223         int new_entry;
224         int old_nr, new_nr, chg_nr;
225         int i;
226
227         /*
228                 Visually we're performing the following (1,2,3,4 = memory types)
229
230                 Sample memory map (w/overlaps):
231                    ____22__________________
232                    ______________________4_
233                    ____1111________________
234                    _44_____________________
235                    11111111________________
236                    ____________________33__
237                    ___________44___________
238                    __________33333_________
239                    ______________22________
240                    ___________________2222_
241                    _________111111111______
242                    _____________________11_
243                    _________________4______
244
245                 Sanitized equivalent (no overlap):
246                    1_______________________
247                    _44_____________________
248                    ___1____________________
249                    ____22__________________
250                    ______11________________
251                    _________1______________
252                    __________3_____________
253                    ___________44___________
254                    _____________33_________
255                    _______________2________
256                    ________________1_______
257                    _________________4______
258                    ___________________2____
259                    ____________________33__
260                    ______________________4_
261         */
262         /* if there's only one memory region, don't bother */
263         if (*pnr_map < 2)
264                 return -1;
265
266         old_nr = *pnr_map;
267
268         /* bail out if we find any unreasonable addresses in memmap */
269         for (i = 0; i < old_nr; i++)
270                 if (map[i].addr + map[i].size < map[i].addr)
271                         return -1;
272
273         /* create pointers for initial change-point information (for sorting) */
274         for (i = 0; i < 2*old_nr; i++)
275                 change_point[i] = &change_point_list[i];
276
277         /* record all known change-points (starting and ending addresses),
278            omitting those that are for empty memory regions */
279         chgidx = 0;
280         for (i = 0; i < old_nr; i++) {
281                 if (map[i].size != 0) {
282                         change_point[chgidx]->addr = map[i].addr;
283                         change_point[chgidx++]->pentry = &map[i];
284                         change_point[chgidx]->addr = map[i].addr + map[i].size;
285                         change_point[chgidx++]->pentry = &map[i];
286                 }
287         }
288         chg_nr = chgidx;        /* true number of change-points */
289
290         /* sort change-point list by memory addresses (low -> high) */
291         still_changing = 1;
292         while (still_changing) {
293                 still_changing = 0;
294                 for (i = 1; i < chg_nr; i++) {
295                         /* if <current_addr> > <last_addr>, swap */
296                         /* or, if current=<start_addr> & last=<end_addr>, swap */
297                         if ((change_point[i]->addr < change_point[i-1]->addr) ||
298                                 ((change_point[i]->addr == change_point[i-1]->addr) &&
299                                  (change_point[i]->addr == change_point[i]->pentry->addr) &&
300                                  (change_point[i-1]->addr != change_point[i-1]->pentry->addr))
301                            ) {
302                                 change_tmp = change_point[i];
303                                 change_point[i] = change_point[i-1];
304                                 change_point[i-1] = change_tmp;
305                                 still_changing = 1;
306                         }
307                 }
308         }
309
310         /* create a new memmap, removing overlaps */
311         overlap_entries = 0;    /* number of entries in the overlap table */
312         new_entry = 0;          /* index for creating new memmap entries */
313         last_type = 0;          /* start with undefined memory type */
314         last_addr = 0;          /* start with 0 as last starting address */
315         /* loop through change-points, determining affect on the new memmap */
316         for (chgidx = 0; chgidx < chg_nr; chgidx++) {
317                 /* keep track of all overlapping memmap entries */
318                 if (change_point[chgidx]->addr == change_point[chgidx]->pentry->addr) {
319                         /* add map entry to overlap list (> 1 entry implies an overlap) */
320                         overlap_list[overlap_entries++] = change_point[chgidx]->pentry;
321                 } else {
322                         /* remove entry from list (order independent, so swap with last) */
323                         for (i = 0; i < overlap_entries; i++) {
324                                 if (overlap_list[i] == change_point[chgidx]->pentry)
325                                         overlap_list[i] = overlap_list[overlap_entries-1];
326                         }
327                         overlap_entries--;
328                 }
329                 /* if there are overlapping entries, decide which "type" to use */
330                 /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
331                 current_type = 0;
332                 for (i = 0; i < overlap_entries; i++)
333                         if (overlap_list[i]->type > current_type)
334                                 current_type = overlap_list[i]->type;
335                 /* continue building up new memmap based on this information */
336                 if (current_type != last_type) {
337                         if (last_type != 0) {
338                                 new_map[new_entry].size =
339                                         change_point[chgidx]->addr - last_addr;
340                                 /* move forward only if the new size was non-zero */
341                                 if (new_map[new_entry].size != 0)
342                                         if (++new_entry >= BFIN_MEMMAP_MAX)
343                                                 break;  /* no more space left for new entries */
344                         }
345                         if (current_type != 0) {
346                                 new_map[new_entry].addr = change_point[chgidx]->addr;
347                                 new_map[new_entry].type = current_type;
348                                 last_addr = change_point[chgidx]->addr;
349                         }
350                         last_type = current_type;
351                 }
352         }
353         new_nr = new_entry;     /* retain count for new entries */
354
355         /* copy new mapping into original location */
356         memcpy(map, new_map, new_nr*sizeof(struct bfin_memmap_entry));
357         *pnr_map = new_nr;
358
359         return 0;
360 }
361
362 static void __init print_memory_map(char *who)
363 {
364         int i;
365
366         for (i = 0; i < bfin_memmap.nr_map; i++) {
367                 printk(KERN_DEBUG " %s: %016Lx - %016Lx ", who,
368                         bfin_memmap.map[i].addr,
369                         bfin_memmap.map[i].addr + bfin_memmap.map[i].size);
370                 switch (bfin_memmap.map[i].type) {
371                 case BFIN_MEMMAP_RAM:
372                                 printk("(usable)\n");
373                                 break;
374                 case BFIN_MEMMAP_RESERVED:
375                                 printk("(reserved)\n");
376                                 break;
377                 default:        printk("type %lu\n", bfin_memmap.map[i].type);
378                                 break;
379                 }
380         }
381 }
382
383 static __init int parse_memmap(char *arg)
384 {
385         unsigned long long start_at, mem_size;
386
387         if (!arg)
388                 return -EINVAL;
389
390         mem_size = memparse(arg, &arg);
391         if (*arg == '@') {
392                 start_at = memparse(arg+1, &arg);
393                 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RAM);
394         } else if (*arg == '$') {
395                 start_at = memparse(arg+1, &arg);
396                 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RESERVED);
397         }
398
399         return 0;
400 }
401
402 /*
403  * Initial parsing of the command line.  Currently, we support:
404  *  - Controlling the linux memory size: mem=xxx[KMG]
405  *  - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
406  *       $ -> reserved memory is dcacheable
407  *       # -> reserved memory is icacheable
408  *  - "memmap=XXX[KkmM][@][$]XXX[KkmM]" defines a memory region
409  *       @ from <start> to <start>+<mem>, type RAM
410  *       $ from <start> to <start>+<mem>, type RESERVED
411  */
412 static __init void parse_cmdline_early(char *cmdline_p)
413 {
414         char c = ' ', *to = cmdline_p;
415         unsigned int memsize;
416         for (;;) {
417                 if (c == ' ') {
418                         if (!memcmp(to, "mem=", 4)) {
419                                 to += 4;
420                                 memsize = memparse(to, &to);
421                                 if (memsize)
422                                         _ramend = memsize;
423
424                         } else if (!memcmp(to, "max_mem=", 8)) {
425                                 to += 8;
426                                 memsize = memparse(to, &to);
427                                 if (memsize) {
428                                         physical_mem_end = memsize;
429                                         if (*to != ' ') {
430                                                 if (*to == '$'
431                                                     || *(to + 1) == '$')
432                                                         reserved_mem_dcache_on = 1;
433                                                 if (*to == '#'
434                                                     || *(to + 1) == '#')
435                                                         reserved_mem_icache_on = 1;
436                                         }
437                                 }
438                         } else if (!memcmp(to, "earlyprintk=", 12)) {
439                                 to += 12;
440                                 setup_early_printk(to);
441                         } else if (!memcmp(to, "memmap=", 7)) {
442                                 to += 7;
443                                 parse_memmap(to);
444                         }
445                 }
446                 c = *(to++);
447                 if (!c)
448                         break;
449         }
450 }
451
452 /*
453  * Setup memory defaults from user config.
454  * The physical memory layout looks like:
455  *
456  *  [_rambase, _ramstart]:              kernel image
457  *  [memory_start, memory_end]:         dynamic memory managed by kernel
458  *  [memory_end, _ramend]:              reserved memory
459  *      [memory_mtd_start(memory_end),
460  *              memory_mtd_start + mtd_size]:   rootfs (if any)
461  *      [_ramend - DMA_UNCACHED_REGION,
462  *              _ramend]:                       uncached DMA region
463  *  [_ramend, physical_mem_end]:        memory not managed by kernel
464  */
465 static __init void memory_setup(void)
466 {
467 #ifdef CONFIG_MTD_UCLINUX
468         unsigned long mtd_phys = 0;
469 #endif
470
471         _rambase = (unsigned long)_stext;
472         _ramstart = (unsigned long)_end;
473
474         if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) {
475                 console_init();
476                 panic("DMA region exceeds memory limit: %lu.\n",
477                         _ramend - _ramstart);
478         }
479         memory_end = _ramend - DMA_UNCACHED_REGION;
480
481 #ifdef CONFIG_MPU
482         /* Round up to multiple of 4MB */
483         memory_start = (_ramstart + 0x3fffff) & ~0x3fffff;
484 #else
485         memory_start = PAGE_ALIGN(_ramstart);
486 #endif
487
488 #if defined(CONFIG_MTD_UCLINUX)
489         /* generic memory mapped MTD driver */
490         memory_mtd_end = memory_end;
491
492         mtd_phys = _ramstart;
493         mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
494
495 # if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
496         if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
497                 mtd_size =
498                     PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
499 # endif
500
501 # if defined(CONFIG_CRAMFS)
502         if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
503                 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
504 # endif
505
506 # if defined(CONFIG_ROMFS_FS)
507         if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
508             && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
509                 mtd_size =
510                     PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
511 #  if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
512         /* Due to a Hardware Anomaly we need to limit the size of usable
513          * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
514          * 05000263 - Hardware loop corrupted when taking an ICPLB exception
515          */
516 #   if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
517         if (memory_end >= 56 * 1024 * 1024)
518                 memory_end = 56 * 1024 * 1024;
519 #   else
520         if (memory_end >= 60 * 1024 * 1024)
521                 memory_end = 60 * 1024 * 1024;
522 #   endif                               /* CONFIG_DEBUG_HUNT_FOR_ZERO */
523 #  endif                                /* ANOMALY_05000263 */
524 # endif                         /* CONFIG_ROMFS_FS */
525
526         memory_end -= mtd_size;
527
528         if (mtd_size == 0) {
529                 console_init();
530                 panic("Don't boot kernel without rootfs attached.\n");
531         }
532
533         /* Relocate MTD image to the top of memory after the uncached memory area */
534         dma_memcpy((char *)memory_end, _end, mtd_size);
535
536         memory_mtd_start = memory_end;
537         _ebss = memory_mtd_start;       /* define _ebss for compatible */
538 #endif                          /* CONFIG_MTD_UCLINUX */
539
540 #if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
541         /* Due to a Hardware Anomaly we need to limit the size of usable
542          * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
543          * 05000263 - Hardware loop corrupted when taking an ICPLB exception
544          */
545 #if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
546         if (memory_end >= 56 * 1024 * 1024)
547                 memory_end = 56 * 1024 * 1024;
548 #else
549         if (memory_end >= 60 * 1024 * 1024)
550                 memory_end = 60 * 1024 * 1024;
551 #endif                          /* CONFIG_DEBUG_HUNT_FOR_ZERO */
552         printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
553 #endif                          /* ANOMALY_05000263 */
554
555 #ifdef CONFIG_MPU
556         page_mask_nelts = ((_ramend >> PAGE_SHIFT) + 31) / 32;
557         page_mask_order = get_order(3 * page_mask_nelts * sizeof(long));
558 #endif
559
560 #if !defined(CONFIG_MTD_UCLINUX)
561         /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
562         memory_end -= SIZE_4K;
563 #endif
564
565         init_mm.start_code = (unsigned long)_stext;
566         init_mm.end_code = (unsigned long)_etext;
567         init_mm.end_data = (unsigned long)_edata;
568         init_mm.brk = (unsigned long)0;
569
570         printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
571         printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
572
573         printk(KERN_INFO "Memory map:\n"
574                 KERN_INFO "  fixedcode = 0x%p-0x%p\n"
575                 KERN_INFO "  text      = 0x%p-0x%p\n"
576                 KERN_INFO "  rodata    = 0x%p-0x%p\n"
577                 KERN_INFO "  bss       = 0x%p-0x%p\n"
578                 KERN_INFO "  data      = 0x%p-0x%p\n"
579                 KERN_INFO "    stack   = 0x%p-0x%p\n"
580                 KERN_INFO "  init      = 0x%p-0x%p\n"
581                 KERN_INFO "  available = 0x%p-0x%p\n"
582 #ifdef CONFIG_MTD_UCLINUX
583                 KERN_INFO "  rootfs    = 0x%p-0x%p\n"
584 #endif
585 #if DMA_UNCACHED_REGION > 0
586                 KERN_INFO "  DMA Zone  = 0x%p-0x%p\n"
587 #endif
588                 , (void *)FIXED_CODE_START, (void *)FIXED_CODE_END,
589                 _stext, _etext,
590                 __start_rodata, __end_rodata,
591                 __bss_start, __bss_stop,
592                 _sdata, _edata,
593                 (void *)&init_thread_union,
594                 (void *)((int)(&init_thread_union) + 0x2000),
595                 __init_begin, __init_end,
596                 (void *)_ramstart, (void *)memory_end
597 #ifdef CONFIG_MTD_UCLINUX
598                 , (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
599 #endif
600 #if DMA_UNCACHED_REGION > 0
601                 , (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
602 #endif
603                 );
604 }
605
606 /*
607  * Find the lowest, highest page frame number we have available
608  */
609 void __init find_min_max_pfn(void)
610 {
611         int i;
612
613         max_pfn = 0;
614         min_low_pfn = memory_end;
615
616         for (i = 0; i < bfin_memmap.nr_map; i++) {
617                 unsigned long start, end;
618                 /* RAM? */
619                 if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
620                         continue;
621                 start = PFN_UP(bfin_memmap.map[i].addr);
622                 end = PFN_DOWN(bfin_memmap.map[i].addr +
623                                 bfin_memmap.map[i].size);
624                 if (start >= end)
625                         continue;
626                 if (end > max_pfn)
627                         max_pfn = end;
628                 if (start < min_low_pfn)
629                         min_low_pfn = start;
630         }
631 }
632
633 static __init void setup_bootmem_allocator(void)
634 {
635         int bootmap_size;
636         int i;
637         unsigned long start_pfn, end_pfn;
638         unsigned long curr_pfn, last_pfn, size;
639
640         /* mark memory between memory_start and memory_end usable */
641         add_memory_region(memory_start,
642                 memory_end - memory_start, BFIN_MEMMAP_RAM);
643         /* sanity check for overlap */
644         sanitize_memmap(bfin_memmap.map, &bfin_memmap.nr_map);
645         print_memory_map("boot memmap");
646
647         /* intialize globals in linux/bootmem.h */
648         find_min_max_pfn();
649         /* pfn of the last usable page frame */
650         if (max_pfn > memory_end >> PAGE_SHIFT)
651                 max_pfn = memory_end >> PAGE_SHIFT;
652         /* pfn of last page frame directly mapped by kernel */
653         max_low_pfn = max_pfn;
654         /* pfn of the first usable page frame after kernel image*/
655         if (min_low_pfn < memory_start >> PAGE_SHIFT)
656                 min_low_pfn = memory_start >> PAGE_SHIFT;
657
658         start_pfn = PAGE_OFFSET >> PAGE_SHIFT;
659         end_pfn = memory_end >> PAGE_SHIFT;
660
661         /*
662          * give all the memory to the bootmap allocator, tell it to put the
663          * boot mem_map at the start of memory.
664          */
665         bootmap_size = init_bootmem_node(NODE_DATA(0),
666                         memory_start >> PAGE_SHIFT,     /* map goes here */
667                         start_pfn, end_pfn);
668
669         /* register the memmap regions with the bootmem allocator */
670         for (i = 0; i < bfin_memmap.nr_map; i++) {
671                 /*
672                  * Reserve usable memory
673                  */
674                 if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
675                         continue;
676                 /*
677                  * We are rounding up the start address of usable memory:
678                  */
679                 curr_pfn = PFN_UP(bfin_memmap.map[i].addr);
680                 if (curr_pfn >= end_pfn)
681                         continue;
682                 /*
683                  * ... and at the end of the usable range downwards:
684                  */
685                 last_pfn = PFN_DOWN(bfin_memmap.map[i].addr +
686                                          bfin_memmap.map[i].size);
687
688                 if (last_pfn > end_pfn)
689                         last_pfn = end_pfn;
690
691                 /*
692                  * .. finally, did all the rounding and playing
693                  * around just make the area go away?
694                  */
695                 if (last_pfn <= curr_pfn)
696                         continue;
697
698                 size = last_pfn - curr_pfn;
699                 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
700         }
701
702         /* reserve memory before memory_start, including bootmap */
703         reserve_bootmem(PAGE_OFFSET,
704                 memory_start + bootmap_size + PAGE_SIZE - 1 - PAGE_OFFSET,
705                 BOOTMEM_DEFAULT);
706 }
707
708 #define EBSZ_TO_MEG(ebsz) \
709 ({ \
710         int meg = 0; \
711         switch (ebsz & 0xf) { \
712                 case 0x1: meg =  16; break; \
713                 case 0x3: meg =  32; break; \
714                 case 0x5: meg =  64; break; \
715                 case 0x7: meg = 128; break; \
716                 case 0x9: meg = 256; break; \
717                 case 0xb: meg = 512; break; \
718         } \
719         meg; \
720 })
721 static inline int __init get_mem_size(void)
722 {
723 #if defined(EBIU_SDBCTL)
724 # if defined(BF561_FAMILY)
725         int ret = 0;
726         u32 sdbctl = bfin_read_EBIU_SDBCTL();
727         ret += EBSZ_TO_MEG(sdbctl >>  0);
728         ret += EBSZ_TO_MEG(sdbctl >>  8);
729         ret += EBSZ_TO_MEG(sdbctl >> 16);
730         ret += EBSZ_TO_MEG(sdbctl >> 24);
731         return ret;
732 # else
733         return EBSZ_TO_MEG(bfin_read_EBIU_SDBCTL());
734 # endif
735 #elif defined(EBIU_DDRCTL1)
736         u32 ddrctl = bfin_read_EBIU_DDRCTL1();
737         int ret = 0;
738         switch (ddrctl & 0xc0000) {
739                 case DEVSZ_64:  ret = 64 / 8;
740                 case DEVSZ_128: ret = 128 / 8;
741                 case DEVSZ_256: ret = 256 / 8;
742                 case DEVSZ_512: ret = 512 / 8;
743         }
744         switch (ddrctl & 0x30000) {
745                 case DEVWD_4:  ret *= 2;
746                 case DEVWD_8:  ret *= 2;
747                 case DEVWD_16: break;
748         }
749         if ((ddrctl & 0xc000) == 0x4000)
750                 ret *= 2;
751         return ret;
752 #endif
753         BUG();
754 }
755
756 void __init setup_arch(char **cmdline_p)
757 {
758         unsigned long sclk, cclk;
759
760 #ifdef CONFIG_DUMMY_CONSOLE
761         conswitchp = &dummy_con;
762 #endif
763
764 #if defined(CONFIG_CMDLINE_BOOL)
765         strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
766         command_line[sizeof(command_line) - 1] = 0;
767 #endif
768
769         /* Keep a copy of command line */
770         *cmdline_p = &command_line[0];
771         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
772         boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
773
774         /* setup memory defaults from the user config */
775         physical_mem_end = 0;
776         _ramend = get_mem_size() * 1024 * 1024;
777
778         memset(&bfin_memmap, 0, sizeof(bfin_memmap));
779
780         parse_cmdline_early(&command_line[0]);
781
782         if (physical_mem_end == 0)
783                 physical_mem_end = _ramend;
784
785         memory_setup();
786
787         /* Initialize Async memory banks */
788         bfin_write_EBIU_AMBCTL0(AMBCTL0VAL);
789         bfin_write_EBIU_AMBCTL1(AMBCTL1VAL);
790         bfin_write_EBIU_AMGCTL(AMGCTLVAL);
791 #ifdef CONFIG_EBIU_MBSCTLVAL
792         bfin_write_EBIU_MBSCTL(CONFIG_EBIU_MBSCTLVAL);
793         bfin_write_EBIU_MODE(CONFIG_EBIU_MODEVAL);
794         bfin_write_EBIU_FCTL(CONFIG_EBIU_FCTLVAL);
795 #endif
796
797         cclk = get_cclk();
798         sclk = get_sclk();
799
800 #if !defined(CONFIG_BFIN_KERNEL_CLOCK)
801         if (ANOMALY_05000273 && cclk == sclk)
802                 panic("ANOMALY 05000273, SCLK can not be same as CCLK");
803 #endif
804
805 #ifdef BF561_FAMILY
806         if (ANOMALY_05000266) {
807                 bfin_read_IMDMA_D0_IRQ_STATUS();
808                 bfin_read_IMDMA_D1_IRQ_STATUS();
809         }
810 #endif
811         printk(KERN_INFO "Hardware Trace ");
812         if (bfin_read_TBUFCTL() & 0x1)
813                 printk("Active ");
814         else
815                 printk("Off ");
816         if (bfin_read_TBUFCTL() & 0x2)
817                 printk("and Enabled\n");
818         else
819         printk("and Disabled\n");
820
821 #if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
822         /* we need to initialize the Flashrom device here since we might
823          * do things with flash early on in the boot
824          */
825         flash_probe();
826 #endif
827
828         _bfin_swrst = bfin_read_SWRST();
829
830 #ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
831         bfin_write_SWRST(_bfin_swrst & ~DOUBLE_FAULT);
832 #endif
833 #ifdef CONFIG_DEBUG_DOUBLEFAULT_RESET
834         bfin_write_SWRST(_bfin_swrst | DOUBLE_FAULT);
835 #endif
836
837 #ifdef CONFIG_SMP
838         if (_bfin_swrst & SWRST_DBL_FAULT_A) {
839 #else
840         if (_bfin_swrst & RESET_DOUBLE) {
841 #endif
842                 printk(KERN_EMERG "Recovering from DOUBLE FAULT event\n");
843 #ifdef CONFIG_DEBUG_DOUBLEFAULT
844                 /* We assume the crashing kernel, and the current symbol table match */
845                 printk(KERN_EMERG " While handling exception (EXCAUSE = 0x%x) at %pF\n",
846                         (int)init_saved_seqstat & SEQSTAT_EXCAUSE, init_saved_retx);
847                 printk(KERN_NOTICE "   DCPLB_FAULT_ADDR: %pF\n", init_saved_dcplb_fault_addr);
848                 printk(KERN_NOTICE "   ICPLB_FAULT_ADDR: %pF\n", init_saved_icplb_fault_addr);
849 #endif
850                 printk(KERN_NOTICE " The instruction at %pF caused a double exception\n",
851                         init_retx);
852         } else if (_bfin_swrst & RESET_WDOG)
853                 printk(KERN_INFO "Recovering from Watchdog event\n");
854         else if (_bfin_swrst & RESET_SOFTWARE)
855                 printk(KERN_NOTICE "Reset caused by Software reset\n");
856
857         printk(KERN_INFO "Blackfin support (C) 2004-2008 Analog Devices, Inc.\n");
858         if (bfin_compiled_revid() == 0xffff)
859                 printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
860         else if (bfin_compiled_revid() == -1)
861                 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
862         else
863                 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
864
865         if (unlikely(CPUID != bfin_cpuid()))
866                 printk(KERN_ERR "ERROR: Not running on ADSP-%s: unknown CPUID 0x%04x Rev 0.%d\n",
867                         CPU, bfin_cpuid(), bfin_revid());
868         else {
869                 if (bfin_revid() != bfin_compiled_revid()) {
870                         if (bfin_compiled_revid() == -1)
871                                 printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
872                                        bfin_revid());
873                         else if (bfin_compiled_revid() != 0xffff)
874                                 printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
875                                        bfin_compiled_revid(), bfin_revid());
876                 }
877                 if (bfin_revid() < CONFIG_BF_REV_MIN || bfin_revid() > CONFIG_BF_REV_MAX)
878                         printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
879                                CPU, bfin_revid());
880         }
881
882         printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
883
884         printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
885                cclk / 1000000, sclk / 1000000);
886
887         if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
888                 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
889
890         setup_bootmem_allocator();
891
892         paging_init();
893
894         /* Copy atomic sequences to their fixed location, and sanity check that
895            these locations are the ones that we advertise to userspace.  */
896         memcpy((void *)FIXED_CODE_START, &fixed_code_start,
897                FIXED_CODE_END - FIXED_CODE_START);
898         BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
899                != SIGRETURN_STUB - FIXED_CODE_START);
900         BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
901                != ATOMIC_XCHG32 - FIXED_CODE_START);
902         BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
903                != ATOMIC_CAS32 - FIXED_CODE_START);
904         BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
905                != ATOMIC_ADD32 - FIXED_CODE_START);
906         BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
907                != ATOMIC_SUB32 - FIXED_CODE_START);
908         BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
909                != ATOMIC_IOR32 - FIXED_CODE_START);
910         BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
911                != ATOMIC_AND32 - FIXED_CODE_START);
912         BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
913                != ATOMIC_XOR32 - FIXED_CODE_START);
914         BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
915                 != SAFE_USER_INSTRUCTION - FIXED_CODE_START);
916
917 #ifdef CONFIG_SMP
918         platform_init_cpus();
919 #endif
920         init_exception_vectors();
921         bfin_cache_init();      /* Initialize caches for the boot CPU */
922 }
923
924 static int __init topology_init(void)
925 {
926         unsigned int cpu;
927         /* Record CPU-private information for the boot processor. */
928         bfin_setup_cpudata(0);
929
930         for_each_possible_cpu(cpu) {
931                 register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu);
932         }
933
934         return 0;
935 }
936
937 subsys_initcall(topology_init);
938
939 /* Get the voltage input multiplier */
940 static u_long cached_vco_pll_ctl, cached_vco;
941 static u_long get_vco(void)
942 {
943         u_long msel;
944
945         u_long pll_ctl = bfin_read_PLL_CTL();
946         if (pll_ctl == cached_vco_pll_ctl)
947                 return cached_vco;
948         else
949                 cached_vco_pll_ctl = pll_ctl;
950
951         msel = (pll_ctl >> 9) & 0x3F;
952         if (0 == msel)
953                 msel = 64;
954
955         cached_vco = CONFIG_CLKIN_HZ;
956         cached_vco >>= (1 & pll_ctl);   /* DF bit */
957         cached_vco *= msel;
958         return cached_vco;
959 }
960
961 /* Get the Core clock */
962 static u_long cached_cclk_pll_div, cached_cclk;
963 u_long get_cclk(void)
964 {
965         u_long csel, ssel;
966
967         if (bfin_read_PLL_STAT() & 0x1)
968                 return CONFIG_CLKIN_HZ;
969
970         ssel = bfin_read_PLL_DIV();
971         if (ssel == cached_cclk_pll_div)
972                 return cached_cclk;
973         else
974                 cached_cclk_pll_div = ssel;
975
976         csel = ((ssel >> 4) & 0x03);
977         ssel &= 0xf;
978         if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
979                 cached_cclk = get_vco() / ssel;
980         else
981                 cached_cclk = get_vco() >> csel;
982         return cached_cclk;
983 }
984 EXPORT_SYMBOL(get_cclk);
985
986 /* Get the System clock */
987 static u_long cached_sclk_pll_div, cached_sclk;
988 u_long get_sclk(void)
989 {
990         u_long ssel;
991
992         if (bfin_read_PLL_STAT() & 0x1)
993                 return CONFIG_CLKIN_HZ;
994
995         ssel = bfin_read_PLL_DIV();
996         if (ssel == cached_sclk_pll_div)
997                 return cached_sclk;
998         else
999                 cached_sclk_pll_div = ssel;
1000
1001         ssel &= 0xf;
1002         if (0 == ssel) {
1003                 printk(KERN_WARNING "Invalid System Clock\n");
1004                 ssel = 1;
1005         }
1006
1007         cached_sclk = get_vco() / ssel;
1008         return cached_sclk;
1009 }
1010 EXPORT_SYMBOL(get_sclk);
1011
1012 unsigned long sclk_to_usecs(unsigned long sclk)
1013 {
1014         u64 tmp = USEC_PER_SEC * (u64)sclk;
1015         do_div(tmp, get_sclk());
1016         return tmp;
1017 }
1018 EXPORT_SYMBOL(sclk_to_usecs);
1019
1020 unsigned long usecs_to_sclk(unsigned long usecs)
1021 {
1022         u64 tmp = get_sclk() * (u64)usecs;
1023         do_div(tmp, USEC_PER_SEC);
1024         return tmp;
1025 }
1026 EXPORT_SYMBOL(usecs_to_sclk);
1027
1028 /*
1029  *      Get CPU information for use by the procfs.
1030  */
1031 static int show_cpuinfo(struct seq_file *m, void *v)
1032 {
1033         char *cpu, *mmu, *fpu, *vendor, *cache;
1034         uint32_t revid;
1035
1036         u_long sclk, cclk;
1037         u_int icache_size = BFIN_ICACHESIZE / 1024, dcache_size = 0, dsup_banks = 0;
1038         struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, *(unsigned int *)v);
1039
1040         cpu = CPU;
1041         mmu = "none";
1042         fpu = "none";
1043         revid = bfin_revid();
1044
1045         sclk = get_sclk();
1046         cclk = get_cclk();
1047
1048         switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
1049         case 0xca:
1050                 vendor = "Analog Devices";
1051                 break;
1052         default:
1053                 vendor = "unknown";
1054                 break;
1055         }
1056
1057         seq_printf(m, "processor\t: %d\n" "vendor_id\t: %s\n",
1058                 *(unsigned int *)v, vendor);
1059
1060         if (CPUID == bfin_cpuid())
1061                 seq_printf(m, "cpu family\t: 0x%04x\n", CPUID);
1062         else
1063                 seq_printf(m, "cpu family\t: Compiled for:0x%04x, running on:0x%04x\n",
1064                         CPUID, bfin_cpuid());
1065
1066         seq_printf(m, "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n"
1067                 "stepping\t: %d\n",
1068                 cpu, cclk/1000000, sclk/1000000,
1069 #ifdef CONFIG_MPU
1070                 "mpu on",
1071 #else
1072                 "mpu off",
1073 #endif
1074                 revid);
1075
1076         seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
1077                 cclk/1000000, cclk%1000000,
1078                 sclk/1000000, sclk%1000000);
1079         seq_printf(m, "bogomips\t: %lu.%02lu\n"
1080                 "Calibration\t: %lu loops\n",
1081                 (cpudata->loops_per_jiffy * HZ) / 500000,
1082                 ((cpudata->loops_per_jiffy * HZ) / 5000) % 100,
1083                 (cpudata->loops_per_jiffy * HZ));
1084
1085         /* Check Cache configutation */
1086         switch (cpudata->dmemctl & (1 << DMC0_P | 1 << DMC1_P)) {
1087         case ACACHE_BSRAM:
1088                 cache = "dbank-A/B\t: cache/sram";
1089                 dcache_size = 16;
1090                 dsup_banks = 1;
1091                 break;
1092         case ACACHE_BCACHE:
1093                 cache = "dbank-A/B\t: cache/cache";
1094                 dcache_size = 32;
1095                 dsup_banks = 2;
1096                 break;
1097         case ASRAM_BSRAM:
1098                 cache = "dbank-A/B\t: sram/sram";
1099                 dcache_size = 0;
1100                 dsup_banks = 0;
1101                 break;
1102         default:
1103                 cache = "unknown";
1104                 dcache_size = 0;
1105                 dsup_banks = 0;
1106                 break;
1107         }
1108
1109         /* Is it turned on? */
1110         if ((cpudata->dmemctl & (ENDCPLB | DMC_ENABLE)) != (ENDCPLB | DMC_ENABLE))
1111                 dcache_size = 0;
1112
1113         if ((cpudata->imemctl & (IMC | ENICPLB)) != (IMC | ENICPLB))
1114                 icache_size = 0;
1115
1116         seq_printf(m, "cache size\t: %d KB(L1 icache) "
1117                 "%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
1118                 icache_size, dcache_size,
1119 #if defined CONFIG_BFIN_WB
1120                 "wb"
1121 #elif defined CONFIG_BFIN_WT
1122                 "wt"
1123 #endif
1124                 "", 0);
1125
1126         seq_printf(m, "%s\n", cache);
1127
1128         if (icache_size)
1129                 seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
1130                            BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
1131         else
1132                 seq_printf(m, "icache setup\t: off\n");
1133
1134         seq_printf(m,
1135                    "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
1136                    dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
1137                    BFIN_DLINES);
1138 #ifdef __ARCH_SYNC_CORE_DCACHE
1139         seq_printf(m,
1140                 "SMP Dcache Flushes\t: %lu\n\n",
1141                 per_cpu(cpu_data, *(unsigned int *)v).dcache_invld_count);
1142 #endif
1143 #ifdef CONFIG_BFIN_ICACHE_LOCK
1144         switch ((cpudata->imemctl >> 3) & WAYALL_L) {
1145         case WAY0_L:
1146                 seq_printf(m, "Way0 Locked-Down\n");
1147                 break;
1148         case WAY1_L:
1149                 seq_printf(m, "Way1 Locked-Down\n");
1150                 break;
1151         case WAY01_L:
1152                 seq_printf(m, "Way0,Way1 Locked-Down\n");
1153                 break;
1154         case WAY2_L:
1155                 seq_printf(m, "Way2 Locked-Down\n");
1156                 break;
1157         case WAY02_L:
1158                 seq_printf(m, "Way0,Way2 Locked-Down\n");
1159                 break;
1160         case WAY12_L:
1161                 seq_printf(m, "Way1,Way2 Locked-Down\n");
1162                 break;
1163         case WAY012_L:
1164                 seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
1165                 break;
1166         case WAY3_L:
1167                 seq_printf(m, "Way3 Locked-Down\n");
1168                 break;
1169         case WAY03_L:
1170                 seq_printf(m, "Way0,Way3 Locked-Down\n");
1171                 break;
1172         case WAY13_L:
1173                 seq_printf(m, "Way1,Way3 Locked-Down\n");
1174                 break;
1175         case WAY013_L:
1176                 seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
1177                 break;
1178         case WAY32_L:
1179                 seq_printf(m, "Way3,Way2 Locked-Down\n");
1180                 break;
1181         case WAY320_L:
1182                 seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
1183                 break;
1184         case WAY321_L:
1185                 seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
1186                 break;
1187         case WAYALL_L:
1188                 seq_printf(m, "All Ways are locked\n");
1189                 break;
1190         default:
1191                 seq_printf(m, "No Ways are locked\n");
1192         }
1193 #endif
1194         if (*(unsigned int *)v != NR_CPUS-1)
1195                 return 0;
1196
1197 #if L2_LENGTH
1198         seq_printf(m, "L2 SRAM\t\t: %dKB\n", L2_LENGTH/0x400);
1199 #endif
1200         seq_printf(m, "board name\t: %s\n", bfin_board_name);
1201         seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
1202                  physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
1203         seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
1204                 ((int)memory_end - (int)_stext) >> 10,
1205                 _stext,
1206                 (void *)memory_end);
1207         seq_printf(m, "\n");
1208
1209         return 0;
1210 }
1211
1212 static void *c_start(struct seq_file *m, loff_t *pos)
1213 {
1214         if (*pos == 0)
1215                 *pos = first_cpu(cpu_online_map);
1216         if (*pos >= num_online_cpus())
1217                 return NULL;
1218
1219         return pos;
1220 }
1221
1222 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1223 {
1224         *pos = next_cpu(*pos, cpu_online_map);
1225
1226         return c_start(m, pos);
1227 }
1228
1229 static void c_stop(struct seq_file *m, void *v)
1230 {
1231 }
1232
1233 const struct seq_operations cpuinfo_op = {
1234         .start = c_start,
1235         .next = c_next,
1236         .stop = c_stop,
1237         .show = show_cpuinfo,
1238 };
1239
1240 void __init cmdline_init(const char *r0)
1241 {
1242         if (r0)
1243                 strncpy(command_line, r0, COMMAND_LINE_SIZE);
1244 }