2 * arch/blackfin/kernel/setup.c
4 * Copyright 2004-2006 Analog Devices Inc.
6 * Enter bugs at http://blackfin.uclinux.org/
8 * Licensed under the GPL-2 or later.
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>
17 #include <linux/module.h>
18 #include <linux/tty.h>
19 #include <linux/pfn.h>
21 #include <linux/ext2_fs.h>
22 #include <linux/cramfs_fs.h>
23 #include <linux/romfs_fs.h>
26 #include <asm/cacheflush.h>
27 #include <asm/blackfin.h>
28 #include <asm/cplbinit.h>
29 #include <asm/div64.h>
31 #include <asm/fixed_code.h>
32 #include <asm/early_printk.h>
35 EXPORT_SYMBOL(_bfin_swrst);
37 unsigned long memory_start, memory_end, physical_mem_end;
38 unsigned long _rambase, _ramstart, _ramend;
39 unsigned long reserved_mem_dcache_on;
40 unsigned long reserved_mem_icache_on;
41 EXPORT_SYMBOL(memory_start);
42 EXPORT_SYMBOL(memory_end);
43 EXPORT_SYMBOL(physical_mem_end);
44 EXPORT_SYMBOL(_ramend);
45 EXPORT_SYMBOL(reserved_mem_dcache_on);
47 #ifdef CONFIG_MTD_UCLINUX
48 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
50 EXPORT_SYMBOL(memory_mtd_end);
51 EXPORT_SYMBOL(memory_mtd_start);
52 EXPORT_SYMBOL(mtd_size);
55 char __initdata command_line[COMMAND_LINE_SIZE];
56 void __initdata *init_retx, *init_saved_retx, *init_saved_seqstat,
57 *init_saved_icplb_fault_addr, *init_saved_dcplb_fault_addr;
59 /* boot memmap, for parsing "memmap=" */
60 #define BFIN_MEMMAP_MAX 128 /* number of entries in bfin_memmap */
61 #define BFIN_MEMMAP_RAM 1
62 #define BFIN_MEMMAP_RESERVED 2
65 struct bfin_memmap_entry {
66 unsigned long long addr; /* start of memory segment */
67 unsigned long long size;
69 } map[BFIN_MEMMAP_MAX];
70 } bfin_memmap __initdata;
72 /* for memmap sanitization */
73 struct change_member {
74 struct bfin_memmap_entry *pentry; /* pointer to original entry */
75 unsigned long long addr; /* address for this change point */
77 static struct change_member change_point_list[2*BFIN_MEMMAP_MAX] __initdata;
78 static struct change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata;
79 static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata;
80 static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata;
82 DEFINE_PER_CPU(struct blackfin_cpudata, cpu_data);
84 #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
85 void __init generate_cplb_tables(void)
89 /* Generate per-CPU I&D CPLB tables */
90 for (cpu = 0; cpu < num_possible_cpus(); ++cpu)
91 generate_cplb_tables_cpu(cpu);
95 void __cpuinit bfin_setup_caches(unsigned int cpu)
97 #ifdef CONFIG_BFIN_ICACHE
99 bfin_icache_init(icplb_tbl[cpu]);
101 bfin_icache_init(icplb_tables[cpu]);
105 #ifdef CONFIG_BFIN_DCACHE
107 bfin_dcache_init(dcplb_tbl[cpu]);
109 bfin_dcache_init(dcplb_tables[cpu]);
114 * In cache coherence emulation mode, we need to have the
115 * D-cache enabled before running any atomic operation which
116 * might invove cache invalidation (i.e. spinlock, rwlock).
117 * So printk's are deferred until then.
119 #ifdef CONFIG_BFIN_ICACHE
120 printk(KERN_INFO "Instruction Cache Enabled for CPU%u\n", cpu);
122 #ifdef CONFIG_BFIN_DCACHE
123 printk(KERN_INFO "Data Cache Enabled for CPU%u"
124 # if defined CONFIG_BFIN_WB
126 # elif defined CONFIG_BFIN_WT
133 void __cpuinit bfin_setup_cpudata(unsigned int cpu)
135 struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, cpu);
137 cpudata->idle = current;
138 cpudata->loops_per_jiffy = loops_per_jiffy;
139 cpudata->imemctl = bfin_read_IMEM_CONTROL();
140 cpudata->dmemctl = bfin_read_DMEM_CONTROL();
143 void __init bfin_cache_init(void)
145 #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
146 generate_cplb_tables();
148 bfin_setup_caches(0);
151 void __init bfin_relocate_l1_mem(void)
153 unsigned long l1_code_length;
154 unsigned long l1_data_a_length;
155 unsigned long l1_data_b_length;
156 unsigned long l2_length;
158 blackfin_dma_early_init();
160 l1_code_length = _etext_l1 - _stext_l1;
161 if (l1_code_length > L1_CODE_LENGTH)
162 panic("L1 Instruction SRAM Overflow\n");
163 /* cannot complain as printk is not available as yet.
164 * But we can continue booting and complain later!
167 /* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
168 dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);
170 l1_data_a_length = _sbss_l1 - _sdata_l1;
171 if (l1_data_a_length > L1_DATA_A_LENGTH)
172 panic("L1 Data SRAM Bank A Overflow\n");
174 /* Copy _sdata_l1 to _sbss_l1 to L1 data bank A SRAM */
175 dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);
177 l1_data_b_length = _sbss_b_l1 - _sdata_b_l1;
178 if (l1_data_b_length > L1_DATA_B_LENGTH)
179 panic("L1 Data SRAM Bank B Overflow\n");
181 /* Copy _sdata_b_l1 to _sbss_b_l1 to L1 data bank B SRAM */
182 dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
183 l1_data_a_length, l1_data_b_length);
185 if (L2_LENGTH != 0) {
186 l2_length = _sbss_l2 - _stext_l2;
187 if (l2_length > L2_LENGTH)
188 panic("L2 SRAM Overflow\n");
190 /* Copy _stext_l2 to _edata_l2 to L2 SRAM */
191 dma_memcpy(_stext_l2, _l2_lma_start, l2_length);
195 /* add_memory_region to memmap */
196 static void __init add_memory_region(unsigned long long start,
197 unsigned long long size, int type)
201 i = bfin_memmap.nr_map;
203 if (i == BFIN_MEMMAP_MAX) {
204 printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
208 bfin_memmap.map[i].addr = start;
209 bfin_memmap.map[i].size = size;
210 bfin_memmap.map[i].type = type;
211 bfin_memmap.nr_map++;
215 * Sanitize the boot memmap, removing overlaps.
217 static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
219 struct change_member *change_tmp;
220 unsigned long current_type, last_type;
221 unsigned long long last_addr;
222 int chgidx, still_changing;
225 int old_nr, new_nr, chg_nr;
229 Visually we're performing the following (1,2,3,4 = memory types)
231 Sample memory map (w/overlaps):
232 ____22__________________
233 ______________________4_
234 ____1111________________
235 _44_____________________
236 11111111________________
237 ____________________33__
238 ___________44___________
239 __________33333_________
240 ______________22________
241 ___________________2222_
242 _________111111111______
243 _____________________11_
244 _________________4______
246 Sanitized equivalent (no overlap):
247 1_______________________
248 _44_____________________
249 ___1____________________
250 ____22__________________
251 ______11________________
252 _________1______________
253 __________3_____________
254 ___________44___________
255 _____________33_________
256 _______________2________
257 ________________1_______
258 _________________4______
259 ___________________2____
260 ____________________33__
261 ______________________4_
263 /* if there's only one memory region, don't bother */
269 /* bail out if we find any unreasonable addresses in memmap */
270 for (i = 0; i < old_nr; i++)
271 if (map[i].addr + map[i].size < map[i].addr)
274 /* create pointers for initial change-point information (for sorting) */
275 for (i = 0; i < 2*old_nr; i++)
276 change_point[i] = &change_point_list[i];
278 /* record all known change-points (starting and ending addresses),
279 omitting those that are for empty memory regions */
281 for (i = 0; i < old_nr; i++) {
282 if (map[i].size != 0) {
283 change_point[chgidx]->addr = map[i].addr;
284 change_point[chgidx++]->pentry = &map[i];
285 change_point[chgidx]->addr = map[i].addr + map[i].size;
286 change_point[chgidx++]->pentry = &map[i];
289 chg_nr = chgidx; /* true number of change-points */
291 /* sort change-point list by memory addresses (low -> high) */
293 while (still_changing) {
295 for (i = 1; i < chg_nr; i++) {
296 /* if <current_addr> > <last_addr>, swap */
297 /* or, if current=<start_addr> & last=<end_addr>, swap */
298 if ((change_point[i]->addr < change_point[i-1]->addr) ||
299 ((change_point[i]->addr == change_point[i-1]->addr) &&
300 (change_point[i]->addr == change_point[i]->pentry->addr) &&
301 (change_point[i-1]->addr != change_point[i-1]->pentry->addr))
303 change_tmp = change_point[i];
304 change_point[i] = change_point[i-1];
305 change_point[i-1] = change_tmp;
311 /* create a new memmap, removing overlaps */
312 overlap_entries = 0; /* number of entries in the overlap table */
313 new_entry = 0; /* index for creating new memmap entries */
314 last_type = 0; /* start with undefined memory type */
315 last_addr = 0; /* start with 0 as last starting address */
316 /* loop through change-points, determining affect on the new memmap */
317 for (chgidx = 0; chgidx < chg_nr; chgidx++) {
318 /* keep track of all overlapping memmap entries */
319 if (change_point[chgidx]->addr == change_point[chgidx]->pentry->addr) {
320 /* add map entry to overlap list (> 1 entry implies an overlap) */
321 overlap_list[overlap_entries++] = change_point[chgidx]->pentry;
323 /* remove entry from list (order independent, so swap with last) */
324 for (i = 0; i < overlap_entries; i++) {
325 if (overlap_list[i] == change_point[chgidx]->pentry)
326 overlap_list[i] = overlap_list[overlap_entries-1];
330 /* if there are overlapping entries, decide which "type" to use */
331 /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
333 for (i = 0; i < overlap_entries; i++)
334 if (overlap_list[i]->type > current_type)
335 current_type = overlap_list[i]->type;
336 /* continue building up new memmap based on this information */
337 if (current_type != last_type) {
338 if (last_type != 0) {
339 new_map[new_entry].size =
340 change_point[chgidx]->addr - last_addr;
341 /* move forward only if the new size was non-zero */
342 if (new_map[new_entry].size != 0)
343 if (++new_entry >= BFIN_MEMMAP_MAX)
344 break; /* no more space left for new entries */
346 if (current_type != 0) {
347 new_map[new_entry].addr = change_point[chgidx]->addr;
348 new_map[new_entry].type = current_type;
349 last_addr = change_point[chgidx]->addr;
351 last_type = current_type;
354 new_nr = new_entry; /* retain count for new entries */
356 /* copy new mapping into original location */
357 memcpy(map, new_map, new_nr*sizeof(struct bfin_memmap_entry));
363 static void __init print_memory_map(char *who)
367 for (i = 0; i < bfin_memmap.nr_map; i++) {
368 printk(KERN_DEBUG " %s: %016Lx - %016Lx ", who,
369 bfin_memmap.map[i].addr,
370 bfin_memmap.map[i].addr + bfin_memmap.map[i].size);
371 switch (bfin_memmap.map[i].type) {
372 case BFIN_MEMMAP_RAM:
373 printk("(usable)\n");
375 case BFIN_MEMMAP_RESERVED:
376 printk("(reserved)\n");
378 default: printk("type %lu\n", bfin_memmap.map[i].type);
384 static __init int parse_memmap(char *arg)
386 unsigned long long start_at, mem_size;
391 mem_size = memparse(arg, &arg);
393 start_at = memparse(arg+1, &arg);
394 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RAM);
395 } else if (*arg == '$') {
396 start_at = memparse(arg+1, &arg);
397 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RESERVED);
404 * Initial parsing of the command line. Currently, we support:
405 * - Controlling the linux memory size: mem=xxx[KMG]
406 * - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
407 * $ -> reserved memory is dcacheable
408 * # -> reserved memory is icacheable
409 * - "memmap=XXX[KkmM][@][$]XXX[KkmM]" defines a memory region
410 * @ from <start> to <start>+<mem>, type RAM
411 * $ from <start> to <start>+<mem>, type RESERVED
413 static __init void parse_cmdline_early(char *cmdline_p)
415 char c = ' ', *to = cmdline_p;
416 unsigned int memsize;
419 if (!memcmp(to, "mem=", 4)) {
421 memsize = memparse(to, &to);
425 } else if (!memcmp(to, "max_mem=", 8)) {
427 memsize = memparse(to, &to);
429 physical_mem_end = memsize;
433 reserved_mem_dcache_on = 1;
436 reserved_mem_icache_on = 1;
439 } else if (!memcmp(to, "earlyprintk=", 12)) {
441 setup_early_printk(to);
442 } else if (!memcmp(to, "memmap=", 7)) {
454 * Setup memory defaults from user config.
455 * The physical memory layout looks like:
457 * [_rambase, _ramstart]: kernel image
458 * [memory_start, memory_end]: dynamic memory managed by kernel
459 * [memory_end, _ramend]: reserved memory
460 * [memory_mtd_start(memory_end),
461 * memory_mtd_start + mtd_size]: rootfs (if any)
462 * [_ramend - DMA_UNCACHED_REGION,
463 * _ramend]: uncached DMA region
464 * [_ramend, physical_mem_end]: memory not managed by kernel
466 static __init void memory_setup(void)
468 #ifdef CONFIG_MTD_UCLINUX
469 unsigned long mtd_phys = 0;
472 _rambase = (unsigned long)_stext;
473 _ramstart = (unsigned long)_end;
475 if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) {
477 panic("DMA region exceeds memory limit: %lu.\n",
478 _ramend - _ramstart);
480 memory_end = _ramend - DMA_UNCACHED_REGION;
483 /* Round up to multiple of 4MB */
484 memory_start = (_ramstart + 0x3fffff) & ~0x3fffff;
486 memory_start = PAGE_ALIGN(_ramstart);
489 #if defined(CONFIG_MTD_UCLINUX)
490 /* generic memory mapped MTD driver */
491 memory_mtd_end = memory_end;
493 mtd_phys = _ramstart;
494 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
496 # if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
497 if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
499 PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
502 # if defined(CONFIG_CRAMFS)
503 if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
504 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
507 # if defined(CONFIG_ROMFS_FS)
508 if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
509 && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
511 PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
512 # if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
513 /* Due to a Hardware Anomaly we need to limit the size of usable
514 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
515 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
517 # if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
518 if (memory_end >= 56 * 1024 * 1024)
519 memory_end = 56 * 1024 * 1024;
521 if (memory_end >= 60 * 1024 * 1024)
522 memory_end = 60 * 1024 * 1024;
523 # endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
524 # endif /* ANOMALY_05000263 */
525 # endif /* CONFIG_ROMFS_FS */
527 memory_end -= mtd_size;
531 panic("Don't boot kernel without rootfs attached.\n");
534 /* Relocate MTD image to the top of memory after the uncached memory area */
535 dma_memcpy((char *)memory_end, _end, mtd_size);
537 memory_mtd_start = memory_end;
538 _ebss = memory_mtd_start; /* define _ebss for compatible */
539 #endif /* CONFIG_MTD_UCLINUX */
541 #if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
542 /* Due to a Hardware Anomaly we need to limit the size of usable
543 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
544 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
546 #if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
547 if (memory_end >= 56 * 1024 * 1024)
548 memory_end = 56 * 1024 * 1024;
550 if (memory_end >= 60 * 1024 * 1024)
551 memory_end = 60 * 1024 * 1024;
552 #endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
553 printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
554 #endif /* ANOMALY_05000263 */
557 page_mask_nelts = ((_ramend >> PAGE_SHIFT) + 31) / 32;
558 page_mask_order = get_order(3 * page_mask_nelts * sizeof(long));
561 #if !defined(CONFIG_MTD_UCLINUX)
562 /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
563 memory_end -= SIZE_4K;
566 init_mm.start_code = (unsigned long)_stext;
567 init_mm.end_code = (unsigned long)_etext;
568 init_mm.end_data = (unsigned long)_edata;
569 init_mm.brk = (unsigned long)0;
571 printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
572 printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
574 printk(KERN_INFO "Memory map:\n"
575 KERN_INFO " fixedcode = 0x%p-0x%p\n"
576 KERN_INFO " text = 0x%p-0x%p\n"
577 KERN_INFO " rodata = 0x%p-0x%p\n"
578 KERN_INFO " bss = 0x%p-0x%p\n"
579 KERN_INFO " data = 0x%p-0x%p\n"
580 KERN_INFO " stack = 0x%p-0x%p\n"
581 KERN_INFO " init = 0x%p-0x%p\n"
582 KERN_INFO " available = 0x%p-0x%p\n"
583 #ifdef CONFIG_MTD_UCLINUX
584 KERN_INFO " rootfs = 0x%p-0x%p\n"
586 #if DMA_UNCACHED_REGION > 0
587 KERN_INFO " DMA Zone = 0x%p-0x%p\n"
589 , (void *)FIXED_CODE_START, (void *)FIXED_CODE_END,
591 __start_rodata, __end_rodata,
592 __bss_start, __bss_stop,
594 (void *)&init_thread_union,
595 (void *)((int)(&init_thread_union) + 0x2000),
596 __init_begin, __init_end,
597 (void *)_ramstart, (void *)memory_end
598 #ifdef CONFIG_MTD_UCLINUX
599 , (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
601 #if DMA_UNCACHED_REGION > 0
602 , (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
608 * Find the lowest, highest page frame number we have available
610 void __init find_min_max_pfn(void)
615 min_low_pfn = memory_end;
617 for (i = 0; i < bfin_memmap.nr_map; i++) {
618 unsigned long start, end;
620 if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
622 start = PFN_UP(bfin_memmap.map[i].addr);
623 end = PFN_DOWN(bfin_memmap.map[i].addr +
624 bfin_memmap.map[i].size);
629 if (start < min_low_pfn)
634 static __init void setup_bootmem_allocator(void)
638 unsigned long start_pfn, end_pfn;
639 unsigned long curr_pfn, last_pfn, size;
641 /* mark memory between memory_start and memory_end usable */
642 add_memory_region(memory_start,
643 memory_end - memory_start, BFIN_MEMMAP_RAM);
644 /* sanity check for overlap */
645 sanitize_memmap(bfin_memmap.map, &bfin_memmap.nr_map);
646 print_memory_map("boot memmap");
648 /* intialize globals in linux/bootmem.h */
650 /* pfn of the last usable page frame */
651 if (max_pfn > memory_end >> PAGE_SHIFT)
652 max_pfn = memory_end >> PAGE_SHIFT;
653 /* pfn of last page frame directly mapped by kernel */
654 max_low_pfn = max_pfn;
655 /* pfn of the first usable page frame after kernel image*/
656 if (min_low_pfn < memory_start >> PAGE_SHIFT)
657 min_low_pfn = memory_start >> PAGE_SHIFT;
659 start_pfn = PAGE_OFFSET >> PAGE_SHIFT;
660 end_pfn = memory_end >> PAGE_SHIFT;
663 * give all the memory to the bootmap allocator, tell it to put the
664 * boot mem_map at the start of memory.
666 bootmap_size = init_bootmem_node(NODE_DATA(0),
667 memory_start >> PAGE_SHIFT, /* map goes here */
670 /* register the memmap regions with the bootmem allocator */
671 for (i = 0; i < bfin_memmap.nr_map; i++) {
673 * Reserve usable memory
675 if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
678 * We are rounding up the start address of usable memory:
680 curr_pfn = PFN_UP(bfin_memmap.map[i].addr);
681 if (curr_pfn >= end_pfn)
684 * ... and at the end of the usable range downwards:
686 last_pfn = PFN_DOWN(bfin_memmap.map[i].addr +
687 bfin_memmap.map[i].size);
689 if (last_pfn > end_pfn)
693 * .. finally, did all the rounding and playing
694 * around just make the area go away?
696 if (last_pfn <= curr_pfn)
699 size = last_pfn - curr_pfn;
700 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
703 /* reserve memory before memory_start, including bootmap */
704 reserve_bootmem(PAGE_OFFSET,
705 memory_start + bootmap_size + PAGE_SIZE - 1 - PAGE_OFFSET,
709 #define EBSZ_TO_MEG(ebsz) \
712 switch (ebsz & 0xf) { \
713 case 0x1: meg = 16; break; \
714 case 0x3: meg = 32; break; \
715 case 0x5: meg = 64; break; \
716 case 0x7: meg = 128; break; \
717 case 0x9: meg = 256; break; \
718 case 0xb: meg = 512; break; \
722 static inline int __init get_mem_size(void)
724 #if defined(EBIU_SDBCTL)
725 # if defined(BF561_FAMILY)
727 u32 sdbctl = bfin_read_EBIU_SDBCTL();
728 ret += EBSZ_TO_MEG(sdbctl >> 0);
729 ret += EBSZ_TO_MEG(sdbctl >> 8);
730 ret += EBSZ_TO_MEG(sdbctl >> 16);
731 ret += EBSZ_TO_MEG(sdbctl >> 24);
734 return EBSZ_TO_MEG(bfin_read_EBIU_SDBCTL());
736 #elif defined(EBIU_DDRCTL1)
737 u32 ddrctl = bfin_read_EBIU_DDRCTL1();
739 switch (ddrctl & 0xc0000) {
740 case DEVSZ_64: ret = 64 / 8;
741 case DEVSZ_128: ret = 128 / 8;
742 case DEVSZ_256: ret = 256 / 8;
743 case DEVSZ_512: ret = 512 / 8;
745 switch (ddrctl & 0x30000) {
746 case DEVWD_4: ret *= 2;
747 case DEVWD_8: ret *= 2;
748 case DEVWD_16: break;
750 if ((ddrctl & 0xc000) == 0x4000)
757 void __init setup_arch(char **cmdline_p)
759 unsigned long sclk, cclk;
761 #ifdef CONFIG_DUMMY_CONSOLE
762 conswitchp = &dummy_con;
765 #if defined(CONFIG_CMDLINE_BOOL)
766 strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
767 command_line[sizeof(command_line) - 1] = 0;
770 /* Keep a copy of command line */
771 *cmdline_p = &command_line[0];
772 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
773 boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
775 /* setup memory defaults from the user config */
776 physical_mem_end = 0;
777 _ramend = get_mem_size() * 1024 * 1024;
779 memset(&bfin_memmap, 0, sizeof(bfin_memmap));
781 parse_cmdline_early(&command_line[0]);
783 if (physical_mem_end == 0)
784 physical_mem_end = _ramend;
788 /* Initialize Async memory banks */
789 bfin_write_EBIU_AMBCTL0(AMBCTL0VAL);
790 bfin_write_EBIU_AMBCTL1(AMBCTL1VAL);
791 bfin_write_EBIU_AMGCTL(AMGCTLVAL);
792 #ifdef CONFIG_EBIU_MBSCTLVAL
793 bfin_write_EBIU_MBSCTL(CONFIG_EBIU_MBSCTLVAL);
794 bfin_write_EBIU_MODE(CONFIG_EBIU_MODEVAL);
795 bfin_write_EBIU_FCTL(CONFIG_EBIU_FCTLVAL);
801 #if !defined(CONFIG_BFIN_KERNEL_CLOCK)
802 if (ANOMALY_05000273 && cclk == sclk)
803 panic("ANOMALY 05000273, SCLK can not be same as CCLK");
807 if (ANOMALY_05000266) {
808 bfin_read_IMDMA_D0_IRQ_STATUS();
809 bfin_read_IMDMA_D1_IRQ_STATUS();
812 printk(KERN_INFO "Hardware Trace ");
813 if (bfin_read_TBUFCTL() & 0x1)
817 if (bfin_read_TBUFCTL() & 0x2)
818 printk("and Enabled\n");
820 printk("and Disabled\n");
822 #if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
823 /* we need to initialize the Flashrom device here since we might
824 * do things with flash early on in the boot
829 _bfin_swrst = bfin_read_SWRST();
831 #ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
832 bfin_write_SWRST(_bfin_swrst & ~DOUBLE_FAULT);
834 #ifdef CONFIG_DEBUG_DOUBLEFAULT_RESET
835 bfin_write_SWRST(_bfin_swrst | DOUBLE_FAULT);
839 if (_bfin_swrst & SWRST_DBL_FAULT_A) {
841 if (_bfin_swrst & RESET_DOUBLE) {
843 printk(KERN_EMERG "Recovering from DOUBLE FAULT event\n");
844 #ifdef CONFIG_DEBUG_DOUBLEFAULT
845 /* We assume the crashing kernel, and the current symbol table match */
846 printk(KERN_EMERG " While handling exception (EXCAUSE = 0x%x) at %pF\n",
847 (int)init_saved_seqstat & SEQSTAT_EXCAUSE, init_saved_retx);
848 printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %pF\n", init_saved_dcplb_fault_addr);
849 printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %pF\n", init_saved_icplb_fault_addr);
851 printk(KERN_NOTICE " The instruction at %pF caused a double exception\n",
853 } else if (_bfin_swrst & RESET_WDOG)
854 printk(KERN_INFO "Recovering from Watchdog event\n");
855 else if (_bfin_swrst & RESET_SOFTWARE)
856 printk(KERN_NOTICE "Reset caused by Software reset\n");
858 printk(KERN_INFO "Blackfin support (C) 2004-2008 Analog Devices, Inc.\n");
859 if (bfin_compiled_revid() == 0xffff)
860 printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
861 else if (bfin_compiled_revid() == -1)
862 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
864 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
866 if (unlikely(CPUID != bfin_cpuid()))
867 printk(KERN_ERR "ERROR: Not running on ADSP-%s: unknown CPUID 0x%04x Rev 0.%d\n",
868 CPU, bfin_cpuid(), bfin_revid());
870 if (bfin_revid() != bfin_compiled_revid()) {
871 if (bfin_compiled_revid() == -1)
872 printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
874 else if (bfin_compiled_revid() != 0xffff)
875 printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
876 bfin_compiled_revid(), bfin_revid());
878 if (bfin_revid() < CONFIG_BF_REV_MIN || bfin_revid() > CONFIG_BF_REV_MAX)
879 printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
883 printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
885 printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
886 cclk / 1000000, sclk / 1000000);
888 if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
889 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
891 setup_bootmem_allocator();
895 /* Copy atomic sequences to their fixed location, and sanity check that
896 these locations are the ones that we advertise to userspace. */
897 memcpy((void *)FIXED_CODE_START, &fixed_code_start,
898 FIXED_CODE_END - FIXED_CODE_START);
899 BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
900 != SIGRETURN_STUB - FIXED_CODE_START);
901 BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
902 != ATOMIC_XCHG32 - FIXED_CODE_START);
903 BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
904 != ATOMIC_CAS32 - FIXED_CODE_START);
905 BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
906 != ATOMIC_ADD32 - FIXED_CODE_START);
907 BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
908 != ATOMIC_SUB32 - FIXED_CODE_START);
909 BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
910 != ATOMIC_IOR32 - FIXED_CODE_START);
911 BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
912 != ATOMIC_AND32 - FIXED_CODE_START);
913 BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
914 != ATOMIC_XOR32 - FIXED_CODE_START);
915 BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
916 != SAFE_USER_INSTRUCTION - FIXED_CODE_START);
919 platform_init_cpus();
921 init_exception_vectors();
922 bfin_cache_init(); /* Initialize caches for the boot CPU */
925 static int __init topology_init(void)
928 /* Record CPU-private information for the boot processor. */
929 bfin_setup_cpudata(0);
931 for_each_possible_cpu(cpu) {
932 register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu);
938 subsys_initcall(topology_init);
940 /* Get the voltage input multiplier */
941 static u_long cached_vco_pll_ctl, cached_vco;
942 static u_long get_vco(void)
946 u_long pll_ctl = bfin_read_PLL_CTL();
947 if (pll_ctl == cached_vco_pll_ctl)
950 cached_vco_pll_ctl = pll_ctl;
952 msel = (pll_ctl >> 9) & 0x3F;
956 cached_vco = CONFIG_CLKIN_HZ;
957 cached_vco >>= (1 & pll_ctl); /* DF bit */
962 /* Get the Core clock */
963 static u_long cached_cclk_pll_div, cached_cclk;
964 u_long get_cclk(void)
968 if (bfin_read_PLL_STAT() & 0x1)
969 return CONFIG_CLKIN_HZ;
971 ssel = bfin_read_PLL_DIV();
972 if (ssel == cached_cclk_pll_div)
975 cached_cclk_pll_div = ssel;
977 csel = ((ssel >> 4) & 0x03);
979 if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
980 cached_cclk = get_vco() / ssel;
982 cached_cclk = get_vco() >> csel;
985 EXPORT_SYMBOL(get_cclk);
987 /* Get the System clock */
988 static u_long cached_sclk_pll_div, cached_sclk;
989 u_long get_sclk(void)
993 if (bfin_read_PLL_STAT() & 0x1)
994 return CONFIG_CLKIN_HZ;
996 ssel = bfin_read_PLL_DIV();
997 if (ssel == cached_sclk_pll_div)
1000 cached_sclk_pll_div = ssel;
1004 printk(KERN_WARNING "Invalid System Clock\n");
1008 cached_sclk = get_vco() / ssel;
1011 EXPORT_SYMBOL(get_sclk);
1013 unsigned long sclk_to_usecs(unsigned long sclk)
1015 u64 tmp = USEC_PER_SEC * (u64)sclk;
1016 do_div(tmp, get_sclk());
1019 EXPORT_SYMBOL(sclk_to_usecs);
1021 unsigned long usecs_to_sclk(unsigned long usecs)
1023 u64 tmp = get_sclk() * (u64)usecs;
1024 do_div(tmp, USEC_PER_SEC);
1027 EXPORT_SYMBOL(usecs_to_sclk);
1030 * Get CPU information for use by the procfs.
1032 static int show_cpuinfo(struct seq_file *m, void *v)
1034 char *cpu, *mmu, *fpu, *vendor, *cache;
1038 u_int icache_size = BFIN_ICACHESIZE / 1024, dcache_size = 0, dsup_banks = 0;
1039 struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, *(unsigned int *)v);
1044 revid = bfin_revid();
1049 switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
1051 vendor = "Analog Devices";
1058 seq_printf(m, "processor\t: %d\n" "vendor_id\t: %s\n",
1059 *(unsigned int *)v, vendor);
1061 if (CPUID == bfin_cpuid())
1062 seq_printf(m, "cpu family\t: 0x%04x\n", CPUID);
1064 seq_printf(m, "cpu family\t: Compiled for:0x%04x, running on:0x%04x\n",
1065 CPUID, bfin_cpuid());
1067 seq_printf(m, "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n"
1069 cpu, cclk/1000000, sclk/1000000,
1077 seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
1078 cclk/1000000, cclk%1000000,
1079 sclk/1000000, sclk%1000000);
1080 seq_printf(m, "bogomips\t: %lu.%02lu\n"
1081 "Calibration\t: %lu loops\n",
1082 (cpudata->loops_per_jiffy * HZ) / 500000,
1083 ((cpudata->loops_per_jiffy * HZ) / 5000) % 100,
1084 (cpudata->loops_per_jiffy * HZ));
1086 /* Check Cache configutation */
1087 switch (cpudata->dmemctl & (1 << DMC0_P | 1 << DMC1_P)) {
1089 cache = "dbank-A/B\t: cache/sram";
1094 cache = "dbank-A/B\t: cache/cache";
1099 cache = "dbank-A/B\t: sram/sram";
1110 /* Is it turned on? */
1111 if ((cpudata->dmemctl & (ENDCPLB | DMC_ENABLE)) != (ENDCPLB | DMC_ENABLE))
1114 if ((cpudata->imemctl & (IMC | ENICPLB)) != (IMC | ENICPLB))
1117 seq_printf(m, "cache size\t: %d KB(L1 icache) "
1118 "%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
1119 icache_size, dcache_size,
1120 #if defined CONFIG_BFIN_WB
1122 #elif defined CONFIG_BFIN_WT
1127 seq_printf(m, "%s\n", cache);
1130 seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
1131 BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
1133 seq_printf(m, "icache setup\t: off\n");
1136 "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
1137 dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
1139 #ifdef __ARCH_SYNC_CORE_DCACHE
1141 "SMP Dcache Flushes\t: %lu\n\n",
1142 per_cpu(cpu_data, *(unsigned int *)v).dcache_invld_count);
1144 #ifdef CONFIG_BFIN_ICACHE_LOCK
1145 switch ((cpudata->imemctl >> 3) & WAYALL_L) {
1147 seq_printf(m, "Way0 Locked-Down\n");
1150 seq_printf(m, "Way1 Locked-Down\n");
1153 seq_printf(m, "Way0,Way1 Locked-Down\n");
1156 seq_printf(m, "Way2 Locked-Down\n");
1159 seq_printf(m, "Way0,Way2 Locked-Down\n");
1162 seq_printf(m, "Way1,Way2 Locked-Down\n");
1165 seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
1168 seq_printf(m, "Way3 Locked-Down\n");
1171 seq_printf(m, "Way0,Way3 Locked-Down\n");
1174 seq_printf(m, "Way1,Way3 Locked-Down\n");
1177 seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
1180 seq_printf(m, "Way3,Way2 Locked-Down\n");
1183 seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
1186 seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
1189 seq_printf(m, "All Ways are locked\n");
1192 seq_printf(m, "No Ways are locked\n");
1195 if (*(unsigned int *)v != NR_CPUS-1)
1199 seq_printf(m, "L2 SRAM\t\t: %dKB\n", L2_LENGTH/0x400);
1201 seq_printf(m, "board name\t: %s\n", bfin_board_name);
1202 seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
1203 physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
1204 seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
1205 ((int)memory_end - (int)_stext) >> 10,
1207 (void *)memory_end);
1208 seq_printf(m, "\n");
1213 static void *c_start(struct seq_file *m, loff_t *pos)
1216 *pos = first_cpu(cpu_online_map);
1217 if (*pos >= num_online_cpus())
1223 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1225 *pos = next_cpu(*pos, cpu_online_map);
1227 return c_start(m, pos);
1230 static void c_stop(struct seq_file *m, void *v)
1234 const struct seq_operations cpuinfo_op = {
1238 .show = show_cpuinfo,
1241 void __init cmdline_init(const char *r0)
1244 strncpy(command_line, r0, COMMAND_LINE_SIZE);