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>
42 #include <asm/cacheflush.h>
43 #include <asm/blackfin.h>
44 #include <asm/cplbinit.h>
45 #include <asm/fixed_code.h>
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);
57 #ifdef CONFIG_MTD_UCLINUX
58 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
60 EXPORT_SYMBOL(memory_mtd_end);
61 EXPORT_SYMBOL(memory_mtd_start);
62 EXPORT_SYMBOL(mtd_size);
65 char __initdata command_line[COMMAND_LINE_SIZE];
67 void __init bf53x_cache_init(void)
69 #if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
70 generate_cpl_tables();
73 #ifdef CONFIG_BLKFIN_CACHE
75 printk(KERN_INFO "Instruction Cache Enabled\n");
78 #ifdef CONFIG_BLKFIN_DCACHE
80 printk(KERN_INFO "Data Cache Enabled"
81 # if defined CONFIG_BLKFIN_WB
83 # elif defined CONFIG_BLKFIN_WT
90 void __init bf53x_relocate_l1_mem(void)
92 unsigned long l1_code_length;
93 unsigned long l1_data_a_length;
94 unsigned long l1_data_b_length;
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!
103 /* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
104 dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);
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;
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);
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;
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);
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
130 static __init void parse_cmdline_early(char *cmdline_p)
132 char c = ' ', *to = cmdline_p;
133 unsigned int memsize;
137 if (!memcmp(to, "mem=", 4)) {
139 memsize = memparse(to, &to);
143 } else if (!memcmp(to, "max_mem=", 8)) {
145 memsize = memparse(to, &to);
147 physical_mem_end = memsize;
151 reserved_mem_dcache_on =
155 reserved_mem_icache_on =
168 void __init setup_arch(char **cmdline_p)
171 unsigned long l1_length, sclk, cclk;
172 #ifdef CONFIG_MTD_UCLINUX
173 unsigned long mtd_phys = 0;
176 #ifdef CONFIG_DUMMY_CONSOLE
177 conswitchp = &dummy_con;
182 #if !defined(CONFIG_BFIN_KERNEL_CLOCK) && defined(ANOMALY_05000273)
184 panic("ANOMALY 05000273, SCLK can not be same as CCLK");
187 #if defined(ANOMALY_05000266)
188 bfin_read_IMDMA_D0_IRQ_STATUS();
189 bfin_read_IMDMA_D1_IRQ_STATUS();
192 #ifdef DEBUG_SERIAL_EARLY_INIT
193 bfin_console_init(); /* early console registration */
194 /* this give a chance to get printk() working before crash. */
197 #if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
198 /* we need to initialize the Flashrom device here since we might
199 * do things with flash early on in the boot
204 #if defined(CONFIG_CMDLINE_BOOL)
205 strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
206 command_line[sizeof(command_line) - 1] = 0;
209 /* Keep a copy of command line */
210 *cmdline_p = &command_line[0];
211 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
212 boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
214 /* setup memory defaults from the user config */
215 physical_mem_end = 0;
216 _ramend = CONFIG_MEM_SIZE * 1024 * 1024;
218 parse_cmdline_early(&command_line[0]);
220 if (physical_mem_end == 0)
221 physical_mem_end = _ramend;
223 /* by now the stack is part of the init task */
224 memory_end = _ramend - DMA_UNCACHED_REGION;
226 _ramstart = (unsigned long)__bss_stop;
227 memory_start = PAGE_ALIGN(_ramstart);
229 #if defined(CONFIG_MTD_UCLINUX)
230 /* generic memory mapped MTD driver */
231 memory_mtd_end = memory_end;
233 mtd_phys = _ramstart;
234 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
236 # if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
237 if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
239 PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
242 # if defined(CONFIG_CRAMFS)
243 if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
244 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
247 # if defined(CONFIG_ROMFS_FS)
248 if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
249 && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
251 PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
252 # if (defined(CONFIG_BLKFIN_CACHE) && defined(ANOMALY_05000263))
253 /* Due to a Hardware Anomaly we need to limit the size of usable
254 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
255 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
257 # if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
258 if (memory_end >= 56 * 1024 * 1024)
259 memory_end = 56 * 1024 * 1024;
261 if (memory_end >= 60 * 1024 * 1024)
262 memory_end = 60 * 1024 * 1024;
263 # endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
264 # endif /* ANOMALY_05000263 */
265 # endif /* CONFIG_ROMFS_FS */
267 memory_end -= mtd_size;
271 panic("Don't boot kernel without rootfs attached.\n");
274 /* Relocate MTD image to the top of memory after the uncached memory area */
275 dma_memcpy((char *)memory_end, __bss_stop, mtd_size);
277 memory_mtd_start = memory_end;
278 _ebss = memory_mtd_start; /* define _ebss for compatible */
279 #endif /* CONFIG_MTD_UCLINUX */
281 #if (defined(CONFIG_BLKFIN_CACHE) && defined(ANOMALY_05000263))
282 /* Due to a Hardware Anomaly we need to limit the size of usable
283 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
284 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
286 #if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
287 if (memory_end >= 56 * 1024 * 1024)
288 memory_end = 56 * 1024 * 1024;
290 if (memory_end >= 60 * 1024 * 1024)
291 memory_end = 60 * 1024 * 1024;
292 #endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
293 printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
294 #endif /* ANOMALY_05000263 */
296 #if !defined(CONFIG_MTD_UCLINUX)
297 memory_end -= SIZE_4K; /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
299 init_mm.start_code = (unsigned long)_stext;
300 init_mm.end_code = (unsigned long)_etext;
301 init_mm.end_data = (unsigned long)_edata;
302 init_mm.brk = (unsigned long)0;
306 printk(KERN_INFO "Blackfin support (C) 2004-2007 Analog Devices, Inc.\n");
307 if (bfin_compiled_revid() == 0xffff)
308 printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
309 else if (bfin_compiled_revid() == -1)
310 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
312 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
313 if (bfin_revid() != bfin_compiled_revid()) {
314 if (bfin_compiled_revid() == -1)
315 printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
317 else if (bfin_compiled_revid() != 0xffff)
318 printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
319 bfin_compiled_revid(), bfin_revid());
321 if (bfin_revid() < SUPPORTED_REVID)
322 printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
324 printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
326 printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu Mhz System Clock\n",
327 cclk / 1000000, sclk / 1000000);
329 #if defined(ANOMALY_05000273)
330 if ((cclk >> 1) <= sclk)
331 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
334 printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
335 printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
337 printk(KERN_INFO "Memory map:\n"
338 KERN_INFO " text = 0x%p-0x%p\n"
339 KERN_INFO " rodata = 0x%p-0x%p\n"
340 KERN_INFO " data = 0x%p-0x%p\n"
341 KERN_INFO " stack = 0x%p-0x%p\n"
342 KERN_INFO " init = 0x%p-0x%p\n"
343 KERN_INFO " bss = 0x%p-0x%p\n"
344 KERN_INFO " available = 0x%p-0x%p\n"
345 #ifdef CONFIG_MTD_UCLINUX
346 KERN_INFO " rootfs = 0x%p-0x%p\n"
348 #if DMA_UNCACHED_REGION > 0
349 KERN_INFO " DMA Zone = 0x%p-0x%p\n"
352 __start_rodata, __end_rodata,
354 (void*)&init_thread_union, (void*)((int)(&init_thread_union) + 0x2000),
355 __init_begin, __init_end,
356 __bss_start, __bss_stop,
357 (void*)_ramstart, (void*)memory_end
358 #ifdef CONFIG_MTD_UCLINUX
359 , (void*)memory_mtd_start, (void*)(memory_mtd_start + mtd_size)
361 #if DMA_UNCACHED_REGION > 0
362 , (void*)(_ramend - DMA_UNCACHED_REGION), (void*)(_ramend)
367 * give all the memory to the bootmap allocator, tell it to put the
368 * boot mem_map at the start of memory
370 bootmap_size = init_bootmem_node(NODE_DATA(0), memory_start >> PAGE_SHIFT, /* map goes here */
371 PAGE_OFFSET >> PAGE_SHIFT,
372 memory_end >> PAGE_SHIFT);
374 * free the usable memory, we have to make sure we do not free
375 * the bootmem bitmap so we then reserve it after freeing it :-)
377 free_bootmem(memory_start, memory_end - memory_start);
379 reserve_bootmem(memory_start, bootmap_size);
381 * get kmalloc into gear
385 /* check the size of the l1 area */
386 l1_length = _etext_l1 - _stext_l1;
387 if (l1_length > L1_CODE_LENGTH)
388 panic("L1 memory overflow\n");
390 l1_length = _ebss_l1 - _sdata_l1;
391 if (l1_length > L1_DATA_A_LENGTH)
392 panic("L1 memory overflow\n");
395 _bfin_swrst = bfin_read_SICA_SWRST();
397 _bfin_swrst = bfin_read_SWRST();
400 printk(KERN_INFO "Hardware Trace Enabled\n");
401 bfin_write_TBUFCTL(0x03);
403 /* Copy atomic sequences to their fixed location, and sanity check that
404 these locations are the ones that we advertise to userspace. */
405 memcpy((void *)FIXED_CODE_START, &fixed_code_start,
406 FIXED_CODE_END - FIXED_CODE_START);
407 BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
408 != SIGRETURN_STUB - FIXED_CODE_START);
409 BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
410 != ATOMIC_XCHG32 - FIXED_CODE_START);
411 BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
412 != ATOMIC_CAS32 - FIXED_CODE_START);
413 BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
414 != ATOMIC_ADD32 - FIXED_CODE_START);
415 BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
416 != ATOMIC_SUB32 - FIXED_CODE_START);
417 BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
418 != ATOMIC_IOR32 - FIXED_CODE_START);
419 BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
420 != ATOMIC_AND32 - FIXED_CODE_START);
421 BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
422 != ATOMIC_XOR32 - FIXED_CODE_START);
427 static int __init topology_init(void)
429 #if defined (CONFIG_BF561)
430 static struct cpu cpu[2];
431 register_cpu(&cpu[0], 0);
432 register_cpu(&cpu[1], 1);
435 static struct cpu cpu[1];
436 return register_cpu(cpu, 0);
440 subsys_initcall(topology_init);
442 static u_long get_vco(void)
447 msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
451 vco = CONFIG_CLKIN_HZ;
452 vco >>= (1 & bfin_read_PLL_CTL()); /* DF bit */
457 /*Get the Core clock*/
458 u_long get_cclk(void)
461 if (bfin_read_PLL_STAT() & 0x1)
462 return CONFIG_CLKIN_HZ;
464 ssel = bfin_read_PLL_DIV();
465 csel = ((ssel >> 4) & 0x03);
467 if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
468 return get_vco() / ssel;
469 return get_vco() >> csel;
472 EXPORT_SYMBOL(get_cclk);
474 /* Get the System clock */
475 u_long get_sclk(void)
479 if (bfin_read_PLL_STAT() & 0x1)
480 return CONFIG_CLKIN_HZ;
482 ssel = (bfin_read_PLL_DIV() & 0xf);
484 printk(KERN_WARNING "Invalid System Clock\n");
488 return get_vco() / ssel;
491 EXPORT_SYMBOL(get_sclk);
494 * Get CPU information for use by the procfs.
496 static int show_cpuinfo(struct seq_file *m, void *v)
498 char *cpu, *mmu, *fpu, *name;
501 u_long cclk = 0, sclk = 0;
502 u_int dcache_size = 0, dsup_banks = 0;
507 revid = bfin_revid();
508 name = bfin_board_name;
513 seq_printf(m, "CPU:\t\tADSP-%s Rev. 0.%d\n"
516 "Core Clock:\t%9lu Hz\n"
517 "System Clock:\t%9lu Hz\n"
518 "BogoMips:\t%lu.%02lu\n"
519 "Calibration:\t%lu loops\n",
520 cpu, revid, mmu, fpu,
523 (loops_per_jiffy * HZ) / 500000,
524 ((loops_per_jiffy * HZ) / 5000) % 100,
525 (loops_per_jiffy * HZ));
526 seq_printf(m, "Board Name:\t%s\n", name);
527 seq_printf(m, "Board Memory:\t%ld MB\n", physical_mem_end >> 20);
528 seq_printf(m, "Kernel Memory:\t%ld MB\n", (unsigned long)_ramend >> 20);
529 if (bfin_read_IMEM_CONTROL() & (ENICPLB | IMC))
530 seq_printf(m, "I-CACHE:\tON\n");
532 seq_printf(m, "I-CACHE:\tOFF\n");
533 if ((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE))
534 seq_printf(m, "D-CACHE:\tON"
535 #if defined CONFIG_BLKFIN_WB
537 #elif defined CONFIG_BLKFIN_WT
542 seq_printf(m, "D-CACHE:\tOFF\n");
545 switch(bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
547 seq_printf(m, "DBANK-A:\tCACHE\n" "DBANK-B:\tSRAM\n");
552 seq_printf(m, "DBANK-A:\tCACHE\n" "DBANK-B:\tCACHE\n");
557 seq_printf(m, "DBANK-A:\tSRAM\n" "DBANK-B:\tSRAM\n");
566 seq_printf(m, "I-CACHE Size:\t%dKB\n", BLKFIN_ICACHESIZE / 1024);
567 seq_printf(m, "D-CACHE Size:\t%dKB\n", dcache_size);
568 seq_printf(m, "I-CACHE Setup:\t%d Sub-banks/%d Ways, %d Lines/Way\n",
569 BLKFIN_ISUBBANKS, BLKFIN_IWAYS, BLKFIN_ILINES);
571 "D-CACHE Setup:\t%d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
572 dsup_banks, BLKFIN_DSUBBANKS, BLKFIN_DWAYS,
574 #ifdef CONFIG_BLKFIN_CACHE_LOCK
575 switch (read_iloc()) {
577 seq_printf(m, "Way0 Locked-Down\n");
580 seq_printf(m, "Way1 Locked-Down\n");
583 seq_printf(m, "Way0,Way1 Locked-Down\n");
586 seq_printf(m, "Way2 Locked-Down\n");
589 seq_printf(m, "Way0,Way2 Locked-Down\n");
592 seq_printf(m, "Way1,Way2 Locked-Down\n");
595 seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
598 seq_printf(m, "Way3 Locked-Down\n");
601 seq_printf(m, "Way0,Way3 Locked-Down\n");
604 seq_printf(m, "Way1,Way3 Locked-Down\n");
607 seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
610 seq_printf(m, "Way3,Way2 Locked-Down\n");
613 seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
616 seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
619 seq_printf(m, "All Ways are locked\n");
622 seq_printf(m, "No Ways are locked\n");
628 static void *c_start(struct seq_file *m, loff_t *pos)
630 return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
633 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
636 return c_start(m, pos);
639 static void c_stop(struct seq_file *m, void *v)
643 struct seq_operations cpuinfo_op = {
647 .show = show_cpuinfo,
650 void __init cmdline_init(const char *r0)
653 strncpy(command_line, r0, COMMAND_LINE_SIZE);