2 * File: arch/blackfin/kernel/setup.c
10 * Copyright 2004-2006 Analog Devices Inc.
12 * Bugs: Enter bugs at http://blackfin.uclinux.org/
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.
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.
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
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>
38 #include <linux/ext2_fs.h>
39 #include <linux/cramfs_fs.h>
40 #include <linux/romfs_fs.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>
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);
60 #ifdef CONFIG_MTD_UCLINUX
61 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
63 EXPORT_SYMBOL(memory_mtd_end);
64 EXPORT_SYMBOL(memory_mtd_start);
65 EXPORT_SYMBOL(mtd_size);
68 char __initdata command_line[COMMAND_LINE_SIZE];
70 void __init bf53x_cache_init(void)
72 #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
73 generate_cpl_tables();
76 #ifdef CONFIG_BFIN_ICACHE
78 printk(KERN_INFO "Instruction Cache Enabled\n");
81 #ifdef CONFIG_BFIN_DCACHE
83 printk(KERN_INFO "Data Cache Enabled"
84 # if defined CONFIG_BFIN_WB
86 # elif defined CONFIG_BFIN_WT
93 void __init bf53x_relocate_l1_mem(void)
95 unsigned long l1_code_length;
96 unsigned long l1_data_a_length;
97 unsigned long l1_data_b_length;
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!
106 /* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
107 dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);
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;
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);
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;
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);
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
133 static __init void parse_cmdline_early(char *cmdline_p)
135 char c = ' ', *to = cmdline_p;
136 unsigned int memsize;
140 if (!memcmp(to, "mem=", 4)) {
142 memsize = memparse(to, &to);
146 } else if (!memcmp(to, "max_mem=", 8)) {
148 memsize = memparse(to, &to);
150 physical_mem_end = memsize;
154 reserved_mem_dcache_on =
158 reserved_mem_icache_on =
162 } else if (!memcmp(to, "earlyprintk=", 12)) {
164 setup_early_printk(to);
173 void __init setup_arch(char **cmdline_p)
176 unsigned long l1_length, sclk, cclk;
177 #ifdef CONFIG_MTD_UCLINUX
178 unsigned long mtd_phys = 0;
181 #ifdef CONFIG_DUMMY_CONSOLE
182 conswitchp = &dummy_con;
185 #if defined(CONFIG_CMDLINE_BOOL)
186 strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
187 command_line[sizeof(command_line) - 1] = 0;
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';
195 /* setup memory defaults from the user config */
196 physical_mem_end = 0;
197 _ramend = CONFIG_MEM_SIZE * 1024 * 1024;
199 parse_cmdline_early(&command_line[0]);
204 #if !defined(CONFIG_BFIN_KERNEL_CLOCK)
205 if (ANOMALY_05000273 && cclk == sclk)
206 panic("ANOMALY 05000273, SCLK can not be same as CCLK");
210 if (ANOMALY_05000266) {
211 bfin_read_IMDMA_D0_IRQ_STATUS();
212 bfin_read_IMDMA_D1_IRQ_STATUS();
216 printk(KERN_INFO "Hardware Trace ");
217 if (bfin_read_TBUFCTL() & 0x1 )
221 if (bfin_read_TBUFCTL() & 0x2)
222 printk("and Enabled\n");
224 printk("and Disabled\n");
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
234 if (physical_mem_end == 0)
235 physical_mem_end = _ramend;
237 /* by now the stack is part of the init task */
238 memory_end = _ramend - DMA_UNCACHED_REGION;
240 _ramstart = (unsigned long)__bss_stop;
242 /* Round up to multiple of 4MB. */
243 memory_start = (_ramstart + 0x3fffff) & ~0x3fffff;
245 memory_start = PAGE_ALIGN(_ramstart);
248 #if defined(CONFIG_MTD_UCLINUX)
249 /* generic memory mapped MTD driver */
250 memory_mtd_end = memory_end;
252 mtd_phys = _ramstart;
253 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
255 # if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
256 if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
258 PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
261 # if defined(CONFIG_CRAMFS)
262 if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
263 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
266 # if defined(CONFIG_ROMFS_FS)
267 if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
268 && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
270 PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
271 # if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
272 /* Due to a Hardware Anomaly we need to limit the size of usable
273 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
274 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
276 # if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
277 if (memory_end >= 56 * 1024 * 1024)
278 memory_end = 56 * 1024 * 1024;
280 if (memory_end >= 60 * 1024 * 1024)
281 memory_end = 60 * 1024 * 1024;
282 # endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
283 # endif /* ANOMALY_05000263 */
284 # endif /* CONFIG_ROMFS_FS */
286 memory_end -= mtd_size;
290 panic("Don't boot kernel without rootfs attached.\n");
293 /* Relocate MTD image to the top of memory after the uncached memory area */
294 dma_memcpy((char *)memory_end, __bss_stop, mtd_size);
296 memory_mtd_start = memory_end;
297 _ebss = memory_mtd_start; /* define _ebss for compatible */
298 #endif /* CONFIG_MTD_UCLINUX */
300 #if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
301 /* Due to a Hardware Anomaly we need to limit the size of usable
302 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
303 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
305 #if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
306 if (memory_end >= 56 * 1024 * 1024)
307 memory_end = 56 * 1024 * 1024;
309 if (memory_end >= 60 * 1024 * 1024)
310 memory_end = 60 * 1024 * 1024;
311 #endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
312 printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
313 #endif /* ANOMALY_05000263 */
316 page_mask_nelts = ((_ramend >> PAGE_SHIFT) + 31) / 32;
317 page_mask_order = get_order(3 * page_mask_nelts * sizeof(long));
320 #if !defined(CONFIG_MTD_UCLINUX)
321 memory_end -= SIZE_4K; /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
323 init_mm.start_code = (unsigned long)_stext;
324 init_mm.end_code = (unsigned long)_etext;
325 init_mm.end_data = (unsigned long)_edata;
326 init_mm.brk = (unsigned long)0;
328 _bfin_swrst = bfin_read_SWRST();
330 if (_bfin_swrst & RESET_DOUBLE)
331 printk(KERN_INFO "Recovering from Double Fault event\n");
332 else if (_bfin_swrst & RESET_WDOG)
333 printk(KERN_INFO "Recovering from Watchdog event\n");
334 else if (_bfin_swrst & RESET_SOFTWARE)
335 printk(KERN_NOTICE "Reset caused by Software reset\n");
337 printk(KERN_INFO "Blackfin support (C) 2004-2007 Analog Devices, Inc.\n");
338 if (bfin_compiled_revid() == 0xffff)
339 printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
340 else if (bfin_compiled_revid() == -1)
341 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
343 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
344 if (bfin_revid() != bfin_compiled_revid()) {
345 if (bfin_compiled_revid() == -1)
346 printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
348 else if (bfin_compiled_revid() != 0xffff)
349 printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
350 bfin_compiled_revid(), bfin_revid());
352 if (bfin_revid() < SUPPORTED_REVID)
353 printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
355 printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
357 printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
358 cclk / 1000000, sclk / 1000000);
360 if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
361 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
363 printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
364 printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
366 printk(KERN_INFO "Memory map:\n"
367 KERN_INFO " text = 0x%p-0x%p\n"
368 KERN_INFO " rodata = 0x%p-0x%p\n"
369 KERN_INFO " data = 0x%p-0x%p\n"
370 KERN_INFO " stack = 0x%p-0x%p\n"
371 KERN_INFO " init = 0x%p-0x%p\n"
372 KERN_INFO " bss = 0x%p-0x%p\n"
373 KERN_INFO " available = 0x%p-0x%p\n"
374 #ifdef CONFIG_MTD_UCLINUX
375 KERN_INFO " rootfs = 0x%p-0x%p\n"
377 #if DMA_UNCACHED_REGION > 0
378 KERN_INFO " DMA Zone = 0x%p-0x%p\n"
381 __start_rodata, __end_rodata,
383 (void *)&init_thread_union, (void *)((int)(&init_thread_union) + 0x2000),
384 __init_begin, __init_end,
385 __bss_start, __bss_stop,
386 (void *)_ramstart, (void *)memory_end
387 #ifdef CONFIG_MTD_UCLINUX
388 , (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
390 #if DMA_UNCACHED_REGION > 0
391 , (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
396 * give all the memory to the bootmap allocator, tell it to put the
397 * boot mem_map at the start of memory
399 bootmap_size = init_bootmem_node(NODE_DATA(0), memory_start >> PAGE_SHIFT, /* map goes here */
400 PAGE_OFFSET >> PAGE_SHIFT,
401 memory_end >> PAGE_SHIFT);
403 * free the usable memory, we have to make sure we do not free
404 * the bootmem bitmap so we then reserve it after freeing it :-)
406 free_bootmem(memory_start, memory_end - memory_start);
408 reserve_bootmem(memory_start, bootmap_size);
410 * get kmalloc into gear
414 /* check the size of the l1 area */
415 l1_length = _etext_l1 - _stext_l1;
416 if (l1_length > L1_CODE_LENGTH)
417 panic("L1 code memory overflow\n");
419 l1_length = _ebss_l1 - _sdata_l1;
420 if (l1_length > L1_DATA_A_LENGTH)
421 panic("L1 data memory overflow\n");
423 /* Copy atomic sequences to their fixed location, and sanity check that
424 these locations are the ones that we advertise to userspace. */
425 memcpy((void *)FIXED_CODE_START, &fixed_code_start,
426 FIXED_CODE_END - FIXED_CODE_START);
427 BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
428 != SIGRETURN_STUB - FIXED_CODE_START);
429 BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
430 != ATOMIC_XCHG32 - FIXED_CODE_START);
431 BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
432 != ATOMIC_CAS32 - FIXED_CODE_START);
433 BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
434 != ATOMIC_ADD32 - FIXED_CODE_START);
435 BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
436 != ATOMIC_SUB32 - FIXED_CODE_START);
437 BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
438 != ATOMIC_IOR32 - FIXED_CODE_START);
439 BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
440 != ATOMIC_AND32 - FIXED_CODE_START);
441 BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
442 != ATOMIC_XOR32 - FIXED_CODE_START);
443 BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
444 != SAFE_USER_INSTRUCTION - FIXED_CODE_START);
446 init_exception_vectors();
450 static int __init topology_init(void)
452 #if defined (CONFIG_BF561)
453 static struct cpu cpu[2];
454 register_cpu(&cpu[0], 0);
455 register_cpu(&cpu[1], 1);
458 static struct cpu cpu[1];
459 return register_cpu(cpu, 0);
463 subsys_initcall(topology_init);
465 static u_long get_vco(void)
470 msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
474 vco = CONFIG_CLKIN_HZ;
475 vco >>= (1 & bfin_read_PLL_CTL()); /* DF bit */
480 /* Get the Core clock */
481 u_long get_cclk(void)
484 if (bfin_read_PLL_STAT() & 0x1)
485 return CONFIG_CLKIN_HZ;
487 ssel = bfin_read_PLL_DIV();
488 csel = ((ssel >> 4) & 0x03);
490 if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
491 return get_vco() / ssel;
492 return get_vco() >> csel;
494 EXPORT_SYMBOL(get_cclk);
496 /* Get the System clock */
497 u_long get_sclk(void)
501 if (bfin_read_PLL_STAT() & 0x1)
502 return CONFIG_CLKIN_HZ;
504 ssel = (bfin_read_PLL_DIV() & 0xf);
506 printk(KERN_WARNING "Invalid System Clock\n");
510 return get_vco() / ssel;
512 EXPORT_SYMBOL(get_sclk);
514 unsigned long sclk_to_usecs(unsigned long sclk)
516 u64 tmp = USEC_PER_SEC * (u64)sclk;
517 do_div(tmp, get_sclk());
520 EXPORT_SYMBOL(sclk_to_usecs);
522 unsigned long usecs_to_sclk(unsigned long usecs)
524 u64 tmp = get_sclk() * (u64)usecs;
525 do_div(tmp, USEC_PER_SEC);
528 EXPORT_SYMBOL(usecs_to_sclk);
531 * Get CPU information for use by the procfs.
533 static int show_cpuinfo(struct seq_file *m, void *v)
535 char *cpu, *mmu, *fpu, *vendor, *cache;
538 u_long cclk = 0, sclk = 0;
539 u_int dcache_size = 0, dsup_banks = 0;
544 revid = bfin_revid();
549 switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
551 vendor = "Analog Devices";
558 seq_printf(m, "processor\t: %d\n"
560 "cpu family\t: 0x%x\n"
561 "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK)\n"
565 (bfin_read_CHIPID() & CHIPID_FAMILY),
566 cpu, cclk/1000000, sclk/1000000,
569 seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
570 cclk/1000000, cclk%1000000,
571 sclk/1000000, sclk%1000000);
572 seq_printf(m, "bogomips\t: %lu.%02lu\n"
573 "Calibration\t: %lu loops\n",
574 (loops_per_jiffy * HZ) / 500000,
575 ((loops_per_jiffy * HZ) / 5000) % 100,
576 (loops_per_jiffy * HZ));
578 /* Check Cache configutation */
579 switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
581 cache = "dbank-A/B\t: cache/sram";
586 cache = "dbank-A/B\t: cache/cache";
591 cache = "dbank-A/B\t: sram/sram";
602 /* Is it turned on? */
603 if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
606 seq_printf(m, "cache size\t: %d KB(L1 icache) "
607 "%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
608 BFIN_ICACHESIZE / 1024, dcache_size,
609 #if defined CONFIG_BFIN_WB
611 #elif defined CONFIG_BFIN_WT
616 seq_printf(m, "%s\n", cache);
618 seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
619 BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
621 "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
622 dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
624 #ifdef CONFIG_BFIN_ICACHE_LOCK
625 switch (read_iloc()) {
627 seq_printf(m, "Way0 Locked-Down\n");
630 seq_printf(m, "Way1 Locked-Down\n");
633 seq_printf(m, "Way0,Way1 Locked-Down\n");
636 seq_printf(m, "Way2 Locked-Down\n");
639 seq_printf(m, "Way0,Way2 Locked-Down\n");
642 seq_printf(m, "Way1,Way2 Locked-Down\n");
645 seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
648 seq_printf(m, "Way3 Locked-Down\n");
651 seq_printf(m, "Way0,Way3 Locked-Down\n");
654 seq_printf(m, "Way1,Way3 Locked-Down\n");
657 seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
660 seq_printf(m, "Way3,Way2 Locked-Down\n");
663 seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
666 seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
669 seq_printf(m, "All Ways are locked\n");
672 seq_printf(m, "No Ways are locked\n");
676 seq_printf(m, "board name\t: %s\n", bfin_board_name);
677 seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
678 physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
679 seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
680 ((int)memory_end - (int)_stext) >> 10,
687 static void *c_start(struct seq_file *m, loff_t *pos)
689 return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
692 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
695 return c_start(m, pos);
698 static void c_stop(struct seq_file *m, void *v)
702 struct seq_operations cpuinfo_op = {
706 .show = show_cpuinfo,
709 void __init cmdline_init(const char *r0)
712 strncpy(command_line, r0, COMMAND_LINE_SIZE);