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