d2822010b7ce4318ef2eed5446c9a7694fb10489
[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
38 #include <linux/ext2_fs.h>
39 #include <linux/cramfs_fs.h>
40 #include <linux/romfs_fs.h>
41
42 #include <asm/cplb.h>
43 #include <asm/cacheflush.h>
44 #include <asm/blackfin.h>
45 #include <asm/cplbinit.h>
46 #include <asm/div64.h>
47 #include <asm/fixed_code.h>
48 #include <asm/early_printk.h>
49
50 u16 _bfin_swrst;
51
52 unsigned long memory_start, memory_end, physical_mem_end;
53 unsigned long reserved_mem_dcache_on;
54 unsigned long reserved_mem_icache_on;
55 EXPORT_SYMBOL(memory_start);
56 EXPORT_SYMBOL(memory_end);
57 EXPORT_SYMBOL(physical_mem_end);
58 EXPORT_SYMBOL(_ramend);
59
60 #ifdef CONFIG_MTD_UCLINUX
61 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
62 unsigned long _ebss;
63 EXPORT_SYMBOL(memory_mtd_end);
64 EXPORT_SYMBOL(memory_mtd_start);
65 EXPORT_SYMBOL(mtd_size);
66 #endif
67
68 char __initdata command_line[COMMAND_LINE_SIZE];
69
70 void __init bf53x_cache_init(void)
71 {
72 #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
73         generate_cpl_tables();
74 #endif
75
76 #ifdef CONFIG_BFIN_ICACHE
77         bfin_icache_init();
78         printk(KERN_INFO "Instruction Cache Enabled\n");
79 #endif
80
81 #ifdef CONFIG_BFIN_DCACHE
82         bfin_dcache_init();
83         printk(KERN_INFO "Data Cache Enabled"
84 # if defined CONFIG_BFIN_WB
85                 " (write-back)"
86 # elif defined CONFIG_BFIN_WT
87                 " (write-through)"
88 # endif
89                 "\n");
90 #endif
91 }
92
93 void __init bf53x_relocate_l1_mem(void)
94 {
95         unsigned long l1_code_length;
96         unsigned long l1_data_a_length;
97         unsigned long l1_data_b_length;
98
99         l1_code_length = _etext_l1 - _stext_l1;
100         if (l1_code_length > L1_CODE_LENGTH)
101                 l1_code_length = L1_CODE_LENGTH;
102         /* cannot complain as printk is not available as yet.
103          * But we can continue booting and complain later!
104          */
105
106         /* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
107         dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);
108
109         l1_data_a_length = _ebss_l1 - _sdata_l1;
110         if (l1_data_a_length > L1_DATA_A_LENGTH)
111                 l1_data_a_length = L1_DATA_A_LENGTH;
112
113         /* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */
114         dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);
115
116         l1_data_b_length = _ebss_b_l1 - _sdata_b_l1;
117         if (l1_data_b_length > L1_DATA_B_LENGTH)
118                 l1_data_b_length = L1_DATA_B_LENGTH;
119
120         /* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */
121         dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
122                         l1_data_a_length, l1_data_b_length);
123
124 }
125
126 /*
127  * Initial parsing of the command line.  Currently, we support:
128  *  - Controlling the linux memory size: mem=xxx[KMG]
129  *  - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
130  *       $ -> reserved memory is dcacheable
131  *       # -> reserved memory is icacheable
132  */
133 static __init void parse_cmdline_early(char *cmdline_p)
134 {
135         char c = ' ', *to = cmdline_p;
136         unsigned int memsize;
137         for (;;) {
138                 if (c == ' ') {
139
140                         if (!memcmp(to, "mem=", 4)) {
141                                 to += 4;
142                                 memsize = memparse(to, &to);
143                                 if (memsize)
144                                         _ramend = memsize;
145
146                         } else if (!memcmp(to, "max_mem=", 8)) {
147                                 to += 8;
148                                 memsize = memparse(to, &to);
149                                 if (memsize) {
150                                         physical_mem_end = memsize;
151                                         if (*to != ' ') {
152                                                 if (*to == '$'
153                                                     || *(to + 1) == '$')
154                                                         reserved_mem_dcache_on =
155                                                             1;
156                                                 if (*to == '#'
157                                                     || *(to + 1) == '#')
158                                                         reserved_mem_icache_on =
159                                                             1;
160                                         }
161                                 }
162                         } else if (!memcmp(to, "earlyprintk=", 12)) {
163                                 to += 12;
164                                 setup_early_printk(to);
165                         }
166                 }
167                 c = *(to++);
168                 if (!c)
169                         break;
170         }
171 }
172
173 void __init setup_arch(char **cmdline_p)
174 {
175         int bootmap_size;
176         unsigned long l1_length, sclk, cclk;
177 #ifdef CONFIG_MTD_UCLINUX
178         unsigned long mtd_phys = 0;
179 #endif
180
181 #ifdef CONFIG_DUMMY_CONSOLE
182         conswitchp = &dummy_con;
183 #endif
184
185 #if defined(CONFIG_CMDLINE_BOOL)
186         strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
187         command_line[sizeof(command_line) - 1] = 0;
188 #endif
189
190         /* Keep a copy of command line */
191         *cmdline_p = &command_line[0];
192         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
193         boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
194
195         /* setup memory defaults from the user config */
196         physical_mem_end = 0;
197         _ramend = CONFIG_MEM_SIZE * 1024 * 1024;
198
199         parse_cmdline_early(&command_line[0]);
200
201         cclk = get_cclk();
202         sclk = get_sclk();
203
204 #if !defined(CONFIG_BFIN_KERNEL_CLOCK)
205         if (ANOMALY_05000273 && cclk == sclk)
206                 panic("ANOMALY 05000273, SCLK can not be same as CCLK");
207 #endif
208
209 #ifdef BF561_FAMILY
210         if (ANOMALY_05000266) {
211                 bfin_read_IMDMA_D0_IRQ_STATUS();
212                 bfin_read_IMDMA_D1_IRQ_STATUS();
213         }
214 #endif
215
216         printk(KERN_INFO "Hardware Trace ");
217         if (bfin_read_TBUFCTL() & 0x1 )
218                 printk("Active ");
219         else
220                 printk("Off ");
221         if (bfin_read_TBUFCTL() & 0x2)
222                 printk("and Enabled\n");
223         else
224         printk("and Disabled\n");
225
226
227 #if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
228         /* we need to initialize the Flashrom device here since we might
229          * do things with flash early on in the boot
230          */
231         flash_probe();
232 #endif
233
234         if (physical_mem_end == 0)
235                 physical_mem_end = _ramend;
236
237         /* by now the stack is part of the init task */
238         memory_end = _ramend - DMA_UNCACHED_REGION;
239
240         _ramstart = (unsigned long)__bss_stop;
241         memory_start = PAGE_ALIGN(_ramstart);
242
243 #if defined(CONFIG_MTD_UCLINUX)
244         /* generic memory mapped MTD driver */
245         memory_mtd_end = memory_end;
246
247         mtd_phys = _ramstart;
248         mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
249
250 # if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
251         if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
252                 mtd_size =
253                     PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
254 # endif
255
256 # if defined(CONFIG_CRAMFS)
257         if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
258                 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
259 # endif
260
261 # if defined(CONFIG_ROMFS_FS)
262         if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
263             && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
264                 mtd_size =
265                     PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
266 #  if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
267         /* Due to a Hardware Anomaly we need to limit the size of usable
268          * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
269          * 05000263 - Hardware loop corrupted when taking an ICPLB exception
270          */
271 #   if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
272         if (memory_end >= 56 * 1024 * 1024)
273                 memory_end = 56 * 1024 * 1024;
274 #   else
275         if (memory_end >= 60 * 1024 * 1024)
276                 memory_end = 60 * 1024 * 1024;
277 #   endif                               /* CONFIG_DEBUG_HUNT_FOR_ZERO */
278 #  endif                                /* ANOMALY_05000263 */
279 # endif                         /* CONFIG_ROMFS_FS */
280
281         memory_end -= mtd_size;
282
283         if (mtd_size == 0) {
284                 console_init();
285                 panic("Don't boot kernel without rootfs attached.\n");
286         }
287
288         /* Relocate MTD image to the top of memory after the uncached memory area */
289         dma_memcpy((char *)memory_end, __bss_stop, mtd_size);
290
291         memory_mtd_start = memory_end;
292         _ebss = memory_mtd_start;       /* define _ebss for compatible */
293 #endif                          /* CONFIG_MTD_UCLINUX */
294
295 #if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
296         /* Due to a Hardware Anomaly we need to limit the size of usable
297          * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
298          * 05000263 - Hardware loop corrupted when taking an ICPLB exception
299          */
300 #if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
301         if (memory_end >= 56 * 1024 * 1024)
302                 memory_end = 56 * 1024 * 1024;
303 #else
304         if (memory_end >= 60 * 1024 * 1024)
305                 memory_end = 60 * 1024 * 1024;
306 #endif                          /* CONFIG_DEBUG_HUNT_FOR_ZERO */
307         printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
308 #endif                          /* ANOMALY_05000263 */
309
310 #if !defined(CONFIG_MTD_UCLINUX)
311         memory_end -= SIZE_4K; /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
312 #endif
313         init_mm.start_code = (unsigned long)_stext;
314         init_mm.end_code = (unsigned long)_etext;
315         init_mm.end_data = (unsigned long)_edata;
316         init_mm.brk = (unsigned long)0;
317
318         init_leds();
319
320         _bfin_swrst = bfin_read_SWRST();
321
322         if (_bfin_swrst & RESET_DOUBLE)
323                 printk(KERN_INFO "Recovering from Double Fault event\n");
324         else if (_bfin_swrst & RESET_WDOG)
325                 printk(KERN_INFO "Recovering from Watchdog event\n");
326         else if (_bfin_swrst & RESET_SOFTWARE)
327                 printk(KERN_NOTICE "Reset caused by Software reset\n");
328
329         printk(KERN_INFO "Blackfin support (C) 2004-2007 Analog Devices, Inc.\n");
330         if (bfin_compiled_revid() == 0xffff)
331                 printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
332         else if (bfin_compiled_revid() == -1)
333                 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
334         else
335                 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
336         if (bfin_revid() != bfin_compiled_revid()) {
337                 if (bfin_compiled_revid() == -1)
338                         printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
339                                bfin_revid());
340                 else if (bfin_compiled_revid() != 0xffff)
341                         printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
342                                bfin_compiled_revid(), bfin_revid());
343         }
344         if (bfin_revid() < SUPPORTED_REVID)
345                 printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
346                        CPU, bfin_revid());
347         printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
348
349         printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
350                cclk / 1000000,  sclk / 1000000);
351
352         if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
353                 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
354
355         printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
356         printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
357
358         printk(KERN_INFO "Memory map:\n"
359                KERN_INFO "  text      = 0x%p-0x%p\n"
360                KERN_INFO "  rodata    = 0x%p-0x%p\n"
361                KERN_INFO "  data      = 0x%p-0x%p\n"
362                KERN_INFO "    stack   = 0x%p-0x%p\n"
363                KERN_INFO "  init      = 0x%p-0x%p\n"
364                KERN_INFO "  bss       = 0x%p-0x%p\n"
365                KERN_INFO "  available = 0x%p-0x%p\n"
366 #ifdef CONFIG_MTD_UCLINUX
367                KERN_INFO "  rootfs    = 0x%p-0x%p\n"
368 #endif
369 #if DMA_UNCACHED_REGION > 0
370                KERN_INFO "  DMA Zone  = 0x%p-0x%p\n"
371 #endif
372                , _stext, _etext,
373                __start_rodata, __end_rodata,
374                _sdata, _edata,
375                (void *)&init_thread_union, (void *)((int)(&init_thread_union) + 0x2000),
376                __init_begin, __init_end,
377                __bss_start, __bss_stop,
378                (void *)_ramstart, (void *)memory_end
379 #ifdef CONFIG_MTD_UCLINUX
380                , (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
381 #endif
382 #if DMA_UNCACHED_REGION > 0
383                , (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
384 #endif
385                );
386
387         /*
388          * give all the memory to the bootmap allocator,  tell it to put the
389          * boot mem_map at the start of memory
390          */
391         bootmap_size = init_bootmem_node(NODE_DATA(0), memory_start >> PAGE_SHIFT,      /* map goes here */
392                                          PAGE_OFFSET >> PAGE_SHIFT,
393                                          memory_end >> PAGE_SHIFT);
394         /*
395          * free the usable memory,  we have to make sure we do not free
396          * the bootmem bitmap so we then reserve it after freeing it :-)
397          */
398         free_bootmem(memory_start, memory_end - memory_start);
399
400         reserve_bootmem(memory_start, bootmap_size);
401         /*
402          * get kmalloc into gear
403          */
404         paging_init();
405
406         /* check the size of the l1 area */
407         l1_length = _etext_l1 - _stext_l1;
408         if (l1_length > L1_CODE_LENGTH)
409                 panic("L1 code memory overflow\n");
410
411         l1_length = _ebss_l1 - _sdata_l1;
412         if (l1_length > L1_DATA_A_LENGTH)
413                 panic("L1 data memory overflow\n");
414
415         /* Copy atomic sequences to their fixed location, and sanity check that
416            these locations are the ones that we advertise to userspace.  */
417         memcpy((void *)FIXED_CODE_START, &fixed_code_start,
418                FIXED_CODE_END - FIXED_CODE_START);
419         BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
420                != SIGRETURN_STUB - FIXED_CODE_START);
421         BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
422                != ATOMIC_XCHG32 - FIXED_CODE_START);
423         BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
424                != ATOMIC_CAS32 - FIXED_CODE_START);
425         BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
426                != ATOMIC_ADD32 - FIXED_CODE_START);
427         BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
428                != ATOMIC_SUB32 - FIXED_CODE_START);
429         BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
430                != ATOMIC_IOR32 - FIXED_CODE_START);
431         BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
432                != ATOMIC_AND32 - FIXED_CODE_START);
433         BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
434                != ATOMIC_XOR32 - FIXED_CODE_START);
435         BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
436                 != SAFE_USER_INSTRUCTION - FIXED_CODE_START);
437
438         init_exception_vectors();
439         bf53x_cache_init();
440 }
441
442 static int __init topology_init(void)
443 {
444 #if defined (CONFIG_BF561)
445         static struct cpu cpu[2];
446         register_cpu(&cpu[0], 0);
447         register_cpu(&cpu[1], 1);
448         return 0;
449 #else
450         static struct cpu cpu[1];
451         return register_cpu(cpu, 0);
452 #endif
453 }
454
455 subsys_initcall(topology_init);
456
457 static u_long get_vco(void)
458 {
459         u_long msel;
460         u_long vco;
461
462         msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
463         if (0 == msel)
464                 msel = 64;
465
466         vco = CONFIG_CLKIN_HZ;
467         vco >>= (1 & bfin_read_PLL_CTL());      /* DF bit */
468         vco = msel * vco;
469         return vco;
470 }
471
472 /* Get the Core clock */
473 u_long get_cclk(void)
474 {
475         u_long csel, ssel;
476         if (bfin_read_PLL_STAT() & 0x1)
477                 return CONFIG_CLKIN_HZ;
478
479         ssel = bfin_read_PLL_DIV();
480         csel = ((ssel >> 4) & 0x03);
481         ssel &= 0xf;
482         if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
483                 return get_vco() / ssel;
484         return get_vco() >> csel;
485 }
486 EXPORT_SYMBOL(get_cclk);
487
488 /* Get the System clock */
489 u_long get_sclk(void)
490 {
491         u_long ssel;
492
493         if (bfin_read_PLL_STAT() & 0x1)
494                 return CONFIG_CLKIN_HZ;
495
496         ssel = (bfin_read_PLL_DIV() & 0xf);
497         if (0 == ssel) {
498                 printk(KERN_WARNING "Invalid System Clock\n");
499                 ssel = 1;
500         }
501
502         return get_vco() / ssel;
503 }
504 EXPORT_SYMBOL(get_sclk);
505
506 unsigned long sclk_to_usecs(unsigned long sclk)
507 {
508         u64 tmp = USEC_PER_SEC * (u64)sclk;
509         do_div(tmp, get_sclk());
510         return tmp;
511 }
512 EXPORT_SYMBOL(sclk_to_usecs);
513
514 unsigned long usecs_to_sclk(unsigned long usecs)
515 {
516         u64 tmp = get_sclk() * (u64)usecs;
517         do_div(tmp, USEC_PER_SEC);
518         return tmp;
519 }
520 EXPORT_SYMBOL(usecs_to_sclk);
521
522 /*
523  *      Get CPU information for use by the procfs.
524  */
525 static int show_cpuinfo(struct seq_file *m, void *v)
526 {
527         char *cpu, *mmu, *fpu, *vendor, *cache;
528         uint32_t revid;
529
530         u_long cclk = 0, sclk = 0;
531         u_int dcache_size = 0, dsup_banks = 0;
532
533         cpu = CPU;
534         mmu = "none";
535         fpu = "none";
536         revid = bfin_revid();
537
538         cclk = get_cclk();
539         sclk = get_sclk();
540
541         switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
542         case 0xca:
543                 vendor = "Analog Devices";
544                 break;
545         default:
546                 vendor = "unknown";
547                 break;
548         }
549
550         seq_printf(m, "processor\t: %d\n"
551                 "vendor_id\t: %s\n"
552                 "cpu family\t: 0x%x\n"
553                 "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK)\n"
554                 "stepping\t: %d\n",
555                 0,
556                 vendor,
557                 (bfin_read_CHIPID() & CHIPID_FAMILY),
558                 cpu, cclk/1000000, sclk/1000000,
559                 revid);
560
561         seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
562                 cclk/1000000, cclk%1000000,
563                 sclk/1000000, sclk%1000000);
564         seq_printf(m, "bogomips\t: %lu.%02lu\n"
565                 "Calibration\t: %lu loops\n",
566                 (loops_per_jiffy * HZ) / 500000,
567                 ((loops_per_jiffy * HZ) / 5000) % 100,
568                 (loops_per_jiffy * HZ));
569
570         /* Check Cache configutation */
571         switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
572         case ACACHE_BSRAM:
573                 cache = "dbank-A/B\t: cache/sram";
574                 dcache_size = 16;
575                 dsup_banks = 1;
576                 break;
577         case ACACHE_BCACHE:
578                 cache = "dbank-A/B\t: cache/cache";
579                 dcache_size = 32;
580                 dsup_banks = 2;
581                 break;
582         case ASRAM_BSRAM:
583                 cache = "dbank-A/B\t: sram/sram";
584                 dcache_size = 0;
585                 dsup_banks = 0;
586                 break;
587         default:
588                 cache = "unknown";
589                 dcache_size = 0;
590                 dsup_banks = 0;
591                 break;
592         }
593
594         /* Is it turned on? */
595         if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
596                 dcache_size = 0;
597
598         seq_printf(m, "cache size\t: %d KB(L1 icache) "
599                 "%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
600                 BFIN_ICACHESIZE / 1024, dcache_size,
601 #if defined CONFIG_BFIN_WB
602                 "wb"
603 #elif defined CONFIG_BFIN_WT
604                 "wt"
605 #endif
606                 "", 0);
607
608         seq_printf(m, "%s\n", cache);
609
610         seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
611                    BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
612         seq_printf(m,
613                    "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
614                    dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
615                    BFIN_DLINES);
616 #ifdef CONFIG_BFIN_ICACHE_LOCK
617         switch (read_iloc()) {
618         case WAY0_L:
619                 seq_printf(m, "Way0 Locked-Down\n");
620                 break;
621         case WAY1_L:
622                 seq_printf(m, "Way1 Locked-Down\n");
623                 break;
624         case WAY01_L:
625                 seq_printf(m, "Way0,Way1 Locked-Down\n");
626                 break;
627         case WAY2_L:
628                 seq_printf(m, "Way2 Locked-Down\n");
629                 break;
630         case WAY02_L:
631                 seq_printf(m, "Way0,Way2 Locked-Down\n");
632                 break;
633         case WAY12_L:
634                 seq_printf(m, "Way1,Way2 Locked-Down\n");
635                 break;
636         case WAY012_L:
637                 seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
638                 break;
639         case WAY3_L:
640                 seq_printf(m, "Way3 Locked-Down\n");
641                 break;
642         case WAY03_L:
643                 seq_printf(m, "Way0,Way3 Locked-Down\n");
644                 break;
645         case WAY13_L:
646                 seq_printf(m, "Way1,Way3 Locked-Down\n");
647                 break;
648         case WAY013_L:
649                 seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
650                 break;
651         case WAY32_L:
652                 seq_printf(m, "Way3,Way2 Locked-Down\n");
653                 break;
654         case WAY320_L:
655                 seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
656                 break;
657         case WAY321_L:
658                 seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
659                 break;
660         case WAYALL_L:
661                 seq_printf(m, "All Ways are locked\n");
662                 break;
663         default:
664                 seq_printf(m, "No Ways are locked\n");
665         }
666 #endif
667
668         seq_printf(m, "board name\t: %s\n", bfin_board_name);
669         seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
670                  physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
671         seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
672                 ((int)memory_end - (int)_stext) >> 10,
673                 _stext,
674                 (void *)memory_end);
675
676         return 0;
677 }
678
679 static void *c_start(struct seq_file *m, loff_t *pos)
680 {
681         return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
682 }
683
684 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
685 {
686         ++*pos;
687         return c_start(m, pos);
688 }
689
690 static void c_stop(struct seq_file *m, void *v)
691 {
692 }
693
694 struct seq_operations cpuinfo_op = {
695         .start = c_start,
696         .next = c_next,
697         .stop = c_stop,
698         .show = show_cpuinfo,
699 };
700
701 void __init cmdline_init(const char *r0)
702 {
703         if (r0)
704                 strncpy(command_line, r0, COMMAND_LINE_SIZE);
705 }