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setup.c

/*
 * File:         arch/blackfin/kernel/setup.c
 * Based on:
 * Author:
 *
 * Created:
 * Description:
 *
 * Modified:
 *               Copyright 2004-2006 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/delay.h>
#include <linux/console.h>
#include <linux/bootmem.h>
#include <linux/seq_file.h>
#include <linux/cpu.h>
#include <linux/module.h>
#include <linux/tty.h>

#include <linux/ext2_fs.h>
#include <linux/cramfs_fs.h>
#include <linux/romfs_fs.h>

#include <asm/cplb.h>
#include <asm/cacheflush.h>
#include <asm/blackfin.h>
#include <asm/cplbinit.h>
#include <asm/div64.h>
#include <asm/fixed_code.h>
#include <asm/early_printk.h>

u16 _bfin_swrst;

unsigned long memory_start, memory_end, physical_mem_end;
unsigned long reserved_mem_dcache_on;
unsigned long reserved_mem_icache_on;
EXPORT_SYMBOL(memory_start);
EXPORT_SYMBOL(memory_end);
EXPORT_SYMBOL(physical_mem_end);
EXPORT_SYMBOL(_ramend);

#ifdef CONFIG_MTD_UCLINUX
unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
unsigned long _ebss;
EXPORT_SYMBOL(memory_mtd_end);
EXPORT_SYMBOL(memory_mtd_start);
EXPORT_SYMBOL(mtd_size);
#endif

char __initdata command_line[COMMAND_LINE_SIZE];

void __init bf53x_cache_init(void)
{
#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
      generate_cpl_tables();
#endif

#ifdef CONFIG_BFIN_ICACHE
      bfin_icache_init();
      printk(KERN_INFO "Instruction Cache Enabled\n");
#endif

#ifdef CONFIG_BFIN_DCACHE
      bfin_dcache_init();
      printk(KERN_INFO "Data Cache Enabled"
# if defined CONFIG_BFIN_WB
            " (write-back)"
# elif defined CONFIG_BFIN_WT
            " (write-through)"
# endif
            "\n");
#endif
}

void __init bf53x_relocate_l1_mem(void)
{
      unsigned long l1_code_length;
      unsigned long l1_data_a_length;
      unsigned long l1_data_b_length;

      l1_code_length = _etext_l1 - _stext_l1;
      if (l1_code_length > L1_CODE_LENGTH)
            l1_code_length = L1_CODE_LENGTH;
      /* cannot complain as printk is not available as yet.
       * But we can continue booting and complain later!
       */

      /* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
      dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);

      l1_data_a_length = _ebss_l1 - _sdata_l1;
      if (l1_data_a_length > L1_DATA_A_LENGTH)
            l1_data_a_length = L1_DATA_A_LENGTH;

      /* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */
      dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);

      l1_data_b_length = _ebss_b_l1 - _sdata_b_l1;
      if (l1_data_b_length > L1_DATA_B_LENGTH)
            l1_data_b_length = L1_DATA_B_LENGTH;

      /* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */
      dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
                  l1_data_a_length, l1_data_b_length);

}

/*
 * Initial parsing of the command line.  Currently, we support:
 *  - Controlling the linux memory size: mem=xxx[KMG]
 *  - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
 *       $ -> reserved memory is dcacheable
 *       # -> reserved memory is icacheable
 */
static __init void parse_cmdline_early(char *cmdline_p)
{
      char c = ' ', *to = cmdline_p;
      unsigned int memsize;
      for (;;) {
            if (c == ' ') {

                  if (!memcmp(to, "mem=", 4)) {
                        to += 4;
                        memsize = memparse(to, &to);
                        if (memsize)
                              _ramend = memsize;

                  } else if (!memcmp(to, "max_mem=", 8)) {
                        to += 8;
                        memsize = memparse(to, &to);
                        if (memsize) {
                              physical_mem_end = memsize;
                              if (*to != ' ') {
                                    if (*to == '$'
                                        || *(to + 1) == '$')
                                          reserved_mem_dcache_on =
                                              1;
                                    if (*to == '#'
                                        || *(to + 1) == '#')
                                          reserved_mem_icache_on =
                                              1;
                              }
                        }
                  } else if (!memcmp(to, "earlyprintk=", 12)) {
                        to += 12;
                        setup_early_printk(to);
                  }
            }
            c = *(to++);
            if (!c)
                  break;
      }
}

void __init setup_arch(char **cmdline_p)
{
      int bootmap_size;
      unsigned long l1_length, sclk, cclk;
#ifdef CONFIG_MTD_UCLINUX
      unsigned long mtd_phys = 0;
#endif

#ifdef CONFIG_DUMMY_CONSOLE
      conswitchp = &dummy_con;
#endif

#if defined(CONFIG_CMDLINE_BOOL)
      strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
      command_line[sizeof(command_line) - 1] = 0;
#endif

      /* Keep a copy of command line */
      *cmdline_p = &command_line[0];
      memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
      boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';

      /* setup memory defaults from the user config */
      physical_mem_end = 0;
      _ramend = CONFIG_MEM_SIZE * 1024 * 1024;

      parse_cmdline_early(&command_line[0]);

      cclk = get_cclk();
      sclk = get_sclk();

#if !defined(CONFIG_BFIN_KERNEL_CLOCK)
      if (ANOMALY_05000273 && cclk == sclk)
            panic("ANOMALY 05000273, SCLK can not be same as CCLK");
#endif

#ifdef BF561_FAMILY
      if (ANOMALY_05000266) {
            bfin_read_IMDMA_D0_IRQ_STATUS();
            bfin_read_IMDMA_D1_IRQ_STATUS();
      }
#endif

      printk(KERN_INFO "Hardware Trace ");
      if (bfin_read_TBUFCTL() & 0x1 )
            printk("Active ");
      else
            printk("Off ");
      if (bfin_read_TBUFCTL() & 0x2)
            printk("and Enabled\n");
      else
      printk("and Disabled\n");


#if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
      /* we need to initialize the Flashrom device here since we might
       * do things with flash early on in the boot
       */
      flash_probe();
#endif

      if (physical_mem_end == 0)
            physical_mem_end = _ramend;

      /* by now the stack is part of the init task */
      memory_end = _ramend - DMA_UNCACHED_REGION;

      _ramstart = (unsigned long)__bss_stop;
      memory_start = PAGE_ALIGN(_ramstart);

#if defined(CONFIG_MTD_UCLINUX)
      /* generic memory mapped MTD driver */
      memory_mtd_end = memory_end;

      mtd_phys = _ramstart;
      mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));

# if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
      if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
            mtd_size =
                PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
# endif

# if defined(CONFIG_CRAMFS)
      if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
            mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
# endif

# if defined(CONFIG_ROMFS_FS)
      if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
          && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
            mtd_size =
                PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
#  if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
      /* Due to a Hardware Anomaly we need to limit the size of usable
       * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
       * 05000263 - Hardware loop corrupted when taking an ICPLB exception
       */
#   if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
      if (memory_end >= 56 * 1024 * 1024)
            memory_end = 56 * 1024 * 1024;
#   else
      if (memory_end >= 60 * 1024 * 1024)
            memory_end = 60 * 1024 * 1024;
#   endif                     /* CONFIG_DEBUG_HUNT_FOR_ZERO */
#  endif                      /* ANOMALY_05000263 */
# endif                       /* CONFIG_ROMFS_FS */

      memory_end -= mtd_size;

      if (mtd_size == 0) {
            console_init();
            panic("Don't boot kernel without rootfs attached.\n");
      }

      /* Relocate MTD image to the top of memory after the uncached memory area */
      dma_memcpy((char *)memory_end, __bss_stop, mtd_size);

      memory_mtd_start = memory_end;
      _ebss = memory_mtd_start;     /* define _ebss for compatible */
#endif                        /* CONFIG_MTD_UCLINUX */

#if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
      /* Due to a Hardware Anomaly we need to limit the size of usable
       * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
       * 05000263 - Hardware loop corrupted when taking an ICPLB exception
       */
#if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
      if (memory_end >= 56 * 1024 * 1024)
            memory_end = 56 * 1024 * 1024;
#else
      if (memory_end >= 60 * 1024 * 1024)
            memory_end = 60 * 1024 * 1024;
#endif                        /* CONFIG_DEBUG_HUNT_FOR_ZERO */
      printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
#endif                        /* ANOMALY_05000263 */

#if !defined(CONFIG_MTD_UCLINUX)
      memory_end -= SIZE_4K; /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
#endif
      init_mm.start_code = (unsigned long)_stext;
      init_mm.end_code = (unsigned long)_etext;
      init_mm.end_data = (unsigned long)_edata;
      init_mm.brk = (unsigned long)0;

      init_leds();

      _bfin_swrst = bfin_read_SWRST();

      if (_bfin_swrst & RESET_DOUBLE)
            printk(KERN_INFO "Recovering from Double Fault event\n");
      else if (_bfin_swrst & RESET_WDOG)
            printk(KERN_INFO "Recovering from Watchdog event\n");
      else if (_bfin_swrst & RESET_SOFTWARE)
            printk(KERN_NOTICE "Reset caused by Software reset\n");

      printk(KERN_INFO "Blackfin support (C) 2004-2007 Analog Devices, Inc.\n");
      if (bfin_compiled_revid() == 0xffff)
            printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
      else if (bfin_compiled_revid() == -1)
            printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
      else
            printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
      if (bfin_revid() != bfin_compiled_revid()) {
            if (bfin_compiled_revid() == -1)
                  printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
                         bfin_revid());
            else if (bfin_compiled_revid() != 0xffff)
                  printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
                         bfin_compiled_revid(), bfin_revid());
      }
      if (bfin_revid() < SUPPORTED_REVID)
            printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
                   CPU, bfin_revid());
      printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");

      printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
             cclk / 1000000,  sclk / 1000000);

      if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
            printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");

      printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
      printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);

      printk(KERN_INFO "Memory map:\n"
             KERN_INFO "  text      = 0x%p-0x%p\n"
             KERN_INFO "  rodata    = 0x%p-0x%p\n"
             KERN_INFO "  data      = 0x%p-0x%p\n"
             KERN_INFO "    stack   = 0x%p-0x%p\n"
             KERN_INFO "  init      = 0x%p-0x%p\n"
             KERN_INFO "  bss       = 0x%p-0x%p\n"
             KERN_INFO "  available = 0x%p-0x%p\n"
#ifdef CONFIG_MTD_UCLINUX
             KERN_INFO "  rootfs    = 0x%p-0x%p\n"
#endif
#if DMA_UNCACHED_REGION > 0
             KERN_INFO "  DMA Zone  = 0x%p-0x%p\n"
#endif
             , _stext, _etext,
             __start_rodata, __end_rodata,
             _sdata, _edata,
             (void *)&init_thread_union, (void *)((int)(&init_thread_union) + 0x2000),
             __init_begin, __init_end,
             __bss_start, __bss_stop,
             (void *)_ramstart, (void *)memory_end
#ifdef CONFIG_MTD_UCLINUX
             , (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
#endif
#if DMA_UNCACHED_REGION > 0
             , (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
#endif
             );

      /*
       * give all the memory to the bootmap allocator,  tell it to put the
       * boot mem_map at the start of memory
       */
      bootmap_size = init_bootmem_node(NODE_DATA(0), memory_start >> PAGE_SHIFT,    /* map goes here */
                               PAGE_OFFSET >> PAGE_SHIFT,
                               memory_end >> PAGE_SHIFT);
      /*
       * free the usable memory,  we have to make sure we do not free
       * the bootmem bitmap so we then reserve it after freeing it :-)
       */
      free_bootmem(memory_start, memory_end - memory_start);

      reserve_bootmem(memory_start, bootmap_size);
      /*
       * get kmalloc into gear
       */
      paging_init();

      /* check the size of the l1 area */
      l1_length = _etext_l1 - _stext_l1;
      if (l1_length > L1_CODE_LENGTH)
            panic("L1 code memory overflow\n");

      l1_length = _ebss_l1 - _sdata_l1;
      if (l1_length > L1_DATA_A_LENGTH)
            panic("L1 data memory overflow\n");

      /* Copy atomic sequences to their fixed location, and sanity check that
         these locations are the ones that we advertise to userspace.  */
      memcpy((void *)FIXED_CODE_START, &fixed_code_start,
             FIXED_CODE_END - FIXED_CODE_START);
      BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
             != SIGRETURN_STUB - FIXED_CODE_START);
      BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
             != ATOMIC_XCHG32 - FIXED_CODE_START);
      BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
             != ATOMIC_CAS32 - FIXED_CODE_START);
      BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
             != ATOMIC_ADD32 - FIXED_CODE_START);
      BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
             != ATOMIC_SUB32 - FIXED_CODE_START);
      BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
             != ATOMIC_IOR32 - FIXED_CODE_START);
      BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
             != ATOMIC_AND32 - FIXED_CODE_START);
      BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
             != ATOMIC_XOR32 - FIXED_CODE_START);
      BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
            != SAFE_USER_INSTRUCTION - FIXED_CODE_START);

      init_exception_vectors();
      bf53x_cache_init();
}

static int __init topology_init(void)
{
#if defined (CONFIG_BF561)
      static struct cpu cpu[2];
      register_cpu(&cpu[0], 0);
      register_cpu(&cpu[1], 1);
      return 0;
#else
      static struct cpu cpu[1];
      return register_cpu(cpu, 0);
#endif
}

subsys_initcall(topology_init);

static u_long get_vco(void)
{
      u_long msel;
      u_long vco;

      msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
      if (0 == msel)
            msel = 64;

      vco = CONFIG_CLKIN_HZ;
      vco >>= (1 & bfin_read_PLL_CTL());  /* DF bit */
      vco = msel * vco;
      return vco;
}

/* Get the Core clock */
u_long get_cclk(void)
{
      u_long csel, ssel;
      if (bfin_read_PLL_STAT() & 0x1)
            return CONFIG_CLKIN_HZ;

      ssel = bfin_read_PLL_DIV();
      csel = ((ssel >> 4) & 0x03);
      ssel &= 0xf;
      if (ssel && ssel < (1 << csel))     /* SCLK > CCLK */
            return get_vco() / ssel;
      return get_vco() >> csel;
}
EXPORT_SYMBOL(get_cclk);

/* Get the System clock */
u_long get_sclk(void)
{
      u_long ssel;

      if (bfin_read_PLL_STAT() & 0x1)
            return CONFIG_CLKIN_HZ;

      ssel = (bfin_read_PLL_DIV() & 0xf);
      if (0 == ssel) {
            printk(KERN_WARNING "Invalid System Clock\n");
            ssel = 1;
      }

      return get_vco() / ssel;
}
EXPORT_SYMBOL(get_sclk);

unsigned long sclk_to_usecs(unsigned long sclk)
{
      u64 tmp = USEC_PER_SEC * (u64)sclk;
      do_div(tmp, get_sclk());
      return tmp;
}
EXPORT_SYMBOL(sclk_to_usecs);

unsigned long usecs_to_sclk(unsigned long usecs)
{
      u64 tmp = get_sclk() * (u64)usecs;
      do_div(tmp, USEC_PER_SEC);
      return tmp;
}
EXPORT_SYMBOL(usecs_to_sclk);

/*
 *    Get CPU information for use by the procfs.
 */
static int show_cpuinfo(struct seq_file *m, void *v)
{
      char *cpu, *mmu, *fpu, *vendor, *cache;
      uint32_t revid;

      u_long cclk = 0, sclk = 0;
      u_int dcache_size = 0, dsup_banks = 0;

      cpu = CPU;
      mmu = "none";
      fpu = "none";
      revid = bfin_revid();

      cclk = get_cclk();
      sclk = get_sclk();

      switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
      case 0xca:
            vendor = "Analog Devices";
            break;
      default:
            vendor = "unknown";
            break;
      }

      seq_printf(m, "processor\t: %d\n"
            "vendor_id\t: %s\n"
            "cpu family\t: 0x%x\n"
            "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK)\n"
            "stepping\t: %d\n",
            0,
            vendor,
            (bfin_read_CHIPID() & CHIPID_FAMILY),
            cpu, cclk/1000000, sclk/1000000,
            revid);

      seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
            cclk/1000000, cclk%1000000,
            sclk/1000000, sclk%1000000);
      seq_printf(m, "bogomips\t: %lu.%02lu\n"
            "Calibration\t: %lu loops\n",
            (loops_per_jiffy * HZ) / 500000,
            ((loops_per_jiffy * HZ) / 5000) % 100,
            (loops_per_jiffy * HZ));

      /* Check Cache configutation */
      switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
      case ACACHE_BSRAM:
            cache = "dbank-A/B\t: cache/sram";
            dcache_size = 16;
            dsup_banks = 1;
            break;
      case ACACHE_BCACHE:
            cache = "dbank-A/B\t: cache/cache";
            dcache_size = 32;
            dsup_banks = 2;
            break;
      case ASRAM_BSRAM:
            cache = "dbank-A/B\t: sram/sram";
            dcache_size = 0;
            dsup_banks = 0;
            break;
      default:
            cache = "unknown";
            dcache_size = 0;
            dsup_banks = 0;
            break;
      }

      /* Is it turned on? */
      if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
            dcache_size = 0;

      seq_printf(m, "cache size\t: %d KB(L1 icache) "
            "%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
            BFIN_ICACHESIZE / 1024, dcache_size,
#if defined CONFIG_BFIN_WB
            "wb"
#elif defined CONFIG_BFIN_WT
            "wt"
#endif
            "", 0);

      seq_printf(m, "%s\n", cache);

      seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
               BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
      seq_printf(m,
               "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
               dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
               BFIN_DLINES);
#ifdef CONFIG_BFIN_ICACHE_LOCK
      switch (read_iloc()) {
      case WAY0_L:
            seq_printf(m, "Way0 Locked-Down\n");
            break;
      case WAY1_L:
            seq_printf(m, "Way1 Locked-Down\n");
            break;
      case WAY01_L:
            seq_printf(m, "Way0,Way1 Locked-Down\n");
            break;
      case WAY2_L:
            seq_printf(m, "Way2 Locked-Down\n");
            break;
      case WAY02_L:
            seq_printf(m, "Way0,Way2 Locked-Down\n");
            break;
      case WAY12_L:
            seq_printf(m, "Way1,Way2 Locked-Down\n");
            break;
      case WAY012_L:
            seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
            break;
      case WAY3_L:
            seq_printf(m, "Way3 Locked-Down\n");
            break;
      case WAY03_L:
            seq_printf(m, "Way0,Way3 Locked-Down\n");
            break;
      case WAY13_L:
            seq_printf(m, "Way1,Way3 Locked-Down\n");
            break;
      case WAY013_L:
            seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
            break;
      case WAY32_L:
            seq_printf(m, "Way3,Way2 Locked-Down\n");
            break;
      case WAY320_L:
            seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
            break;
      case WAY321_L:
            seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
            break;
      case WAYALL_L:
            seq_printf(m, "All Ways are locked\n");
            break;
      default:
            seq_printf(m, "No Ways are locked\n");
      }
#endif

      seq_printf(m, "board name\t: %s\n", bfin_board_name);
      seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
             physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
      seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
            ((int)memory_end - (int)_stext) >> 10,
            _stext,
            (void *)memory_end);

      return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
      return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
}

static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
      ++*pos;
      return c_start(m, pos);
}

static void c_stop(struct seq_file *m, void *v)
{
}

struct seq_operations cpuinfo_op = {
      .start = c_start,
      .next = c_next,
      .stop = c_stop,
      .show = show_cpuinfo,
};

void __init cmdline_init(const char *r0)
{
      if (r0)
            strncpy(command_line, r0, COMMAND_LINE_SIZE);
}

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