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