Embedded Linux Kernel debuggen

Booting Linux on physical CPU 0x0

Linux version 3.8.5+ (tobias@zap) (gcc version 4.7.3 20130312 (release) [ARM/emb

edded-4_7-branch revision 196615] (GNU Tools for ARM Embedded Processors) ) #135

 Wed May 22 21:20:48 CEST 2013

CPU: ARM7TDMI [41007700] revision 0 (ARMv3), cr=00000000

CPU: VIVT data cache, VIVT instruction cache

Machine: LPC24XX SoC (Flattened Device Tree), model: LPC2468 Board

bootconsole [earlycon0] enabled

init early

Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 12192

Kernel command line: earlyprintk console=ttyS0

PID hash table entries: 256 (order: -2, 1024 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory: 48MB = 48MB total

Memory: 48432k/48432k available, 720k reserved, 0K highmem

Virtual kernel memory layout:

    vector  : 0xa0000000 - 0xa0001000   (   4 kB)

    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

    vmalloc : 0x00000000 - 0xffffffff   (4095 MB)

    lowmem  : 0xa0000000 - 0xa3000000   (  48 MB)

      .text : 0x80000000 - 0x8011e024   (1145 kB)

      .init : 0xa000a000 - 0xa000d000   (  12 kB)

      .data : 0xa0008000 - 0xa001c740   (  82 kB)

       .bss : 0xa001c740 - 0xa004370c   ( 156 kB)

SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

NR_IRQS:16 nr_irqs:16 16

OF: no ranges; cannot translate

System timer is /soc/timer@E0004000

OF: no ranges; cannot translate

Kernel panic - not syncing: Can't remap registers

Backtrace:

[<80002f04>] (dump_backtrace+0x0/0x104) from [<800ebab0>] (dump_stack+0x18/0x1c)

 r6:a001c9c8 r5:a000aa20 r4:a00a47f0 r3:00000001

[<800eba98>] (dump_stack+0x0/0x1c) from [<800ebb34>] (panic+0x80/0x1c4)

[<800ebab4>] (panic+0x0/0x1c4) from [<8012b0ec>] (bcm2835_time_init+0x88/0xb8)

 r3:ffffffff r2:ffffffea r1:ffffffff r0:8011b38e

 r7:a00a4be0

[<8012b064>] (bcm2835_time_init+0x0/0xb8) from [<80120fe0>] (time_init+0x28/0x38

)

 r4:a001c740

[<80120fb8>] (time_init+0x0/0x38) from [<8011e6f8>] (start_kernel+0x18c/0x2b4)

[<8011e56c>] (start_kernel+0x0/0x2b4) from [<8000001c>] (0x8000001c)

 r7:a0013e1c r6:a000aa1c r5:a001301c r4:00000000

  node = of_find_matching_node(NULL, timer_match);

  if(node == NULL) {

    panic("can't find node!");

  }

  base = of_iomap(node, 0);

  /* mapping successful? */

  if(base == NULL)

  {

    panic("Can't remap registers");

  }

depends on !MMU

select CLKSRC_MMIO

select COMMON_CLK

select GENERIC_CLOCKEVENTS

select GENERIC_IRQ_CHIP

select IRQ_DOMAIN

# select PINCTRL

select NO_IOPORT

#select CONFIG_CPU_CP15

select USE_OF

select CONFIG_DEBUG_LL

#  select GENERIC_CLOCKEVENTS

select MULTI_IRQ_HANDLER

select SPARSE_IRQ

static void __init timer_init(void)

{

  struct device_node *node = NULL;

  struct resource res;

  int irq;

  do {

    /* get a node from the device tree */

    node = of_find_matching_node(NULL, lpc24xx_timer_match);

    /* check whether this timer is configured as system timer */

    if(of_property_read_bool(node, "system-timer"))

    {

      /* system-timer property is set. use this as the system timer. */

      printk(KERN_ALERT "System timer is %s\n", node->full_name);

      /* determine the base address */

      if(of_address_to_resource(node, 0, &res))

      {

        panic("Cannot determine timer base address");

      }

      /* check the base address */

      if(res.start == 0)

      {

        /* resource is invalid */

        panic("%s: unable to map timer registers\n", node->full_name);

      }

      /* timer rate is 100 per sec */

      setup_sched_clock(timer_read, 32, 100);

      /* setup the mmio clock source */

      clocksource_mmio_init((void*)(res.start + TCR_OFFSET), node->name,

        100, 300, 32, clocksource_mmio_readl_up);

      /* get the hardware irq number */

      irq = irq_of_parse_and_map(node, 0);

      if(irq <= 0)

      {

        panic("Can't parse IRQ");

      }

      /* allocate space for the internal variables */

      timer = kzalloc(sizeof(struct lpc_timer), GFP_KERNEL);

      if(timer == NULL)

      {

        panic("Can't allocate timer struct\n");

      }

      /* set all register addresses */

      timer->control = (void*)(res.start + TCR_OFFSET);

      timer->intreg = (void*)(res.start + IR_OFFSET);

      timer->match = (void*)(res.start + MR0_OFFSET);

      timer->matchcontrol = (void*)(res.start + MCR_OFFSET);

      /* set the irq properties */

      timer->act.name = node->full_name;

      timer->act.flags = IRQF_TIMER | IRQF_SHARED;

      timer->act.dev_id = timer;

      timer->act.handler = timer_handler;

      /* set the event properties */

      timer->evt.name = node->name;

      timer->evt.rating = 300;

      timer->evt.features = CLOCK_EVT_FEAT_ONESHOT;

      timer->evt.set_mode = set_timer_mode;

      timer->evt.set_next_event = set_timer_event;

      timer->evt.cpumask = cpumask_of(0);

      /* setup the interrupt */

      if(setup_irq(irq, &timer->act) != 0)

      {

        panic("Cannot setup the timer IRQ");

      }

      /* configure the clock events */

      clockevents_config_and_register(&timer->evt, 100, 0xf, 0xffffffff);

      printk(KERN_ALERT "System timer %s (IRQ %d)\n", node->full_name, irq);

      return;

      /*T0TCR &= ~0x01;

      T0MR0 = 72000-1;

      T0MCR |= 0x03;

      setup_irq(4, &act);

      VICIntEnable |= (1u << 4);

      T0IR = 0x01;

      T0TCR = 0x02;

      T0TCR = 0x01;

      FIO2DIR |= 1;*/

    }

  } while(node != NULL);

  /* check whether a node was found */

  if(node == NULL)

  {

    panic("No system timer found");

  }

}

Booting Linux on physical CPU 0x0

Linux version 3.8.5+ (tobias@zap) (gcc version 4.7.3 20130312 (release) [ARM/emb

edded-4_7-branch revision 196615] (GNU Tools for ARM Embedded Processors) ) #204

 Thu May 23 23:50:22 CEST 2013

CPU: ARM7TDMI [41007700] revision 0 (ARMv3), cr=00000000

CPU: VIVT data cache, VIVT instruction cache

Machine: LPC24XX SoC (Flattened Device Tree), model: LPC2468 Board

bootconsole [earlycon0] enabled

init early

Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 12192

Kernel command line: earlyprintk console=ttyS0

PID hash table entries: 256 (order: -2, 1024 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory: 48MB = 48MB total

Memory: 48432k/48432k available, 720k reserved, 0K highmem

Virtual kernel memory layout:

    vector  : 0xa0000000 - 0xa0001000   (   4 kB)

    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

    vmalloc : 0x00000000 - 0xffffffff   (4095 MB)

    lowmem  : 0xa0000000 - 0xa3000000   (  48 MB)

      .text : 0x80000000 - 0x80124024   (1169 kB)

      .init : 0xa000a000 - 0xa000d000   (  12 kB)

      .data : 0xa0008000 - 0xa001c7e0   (  82 kB)

       .bss : 0xa001c7e0 - 0xa00437b8   ( 156 kB)

SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

NR_IRQS:16 nr_irqs:32 32

alloc vic

OF: no ranges; cannot translate

calc vic reg addr

1System timer is /soc/timer@E0004000

OF: no ranges; cannot translate

vic_xlate: intspec[0] = 4, intspec[1] = 0.

irq of parse done 

1System timer /soc/timer@E0004000 (IRQ 36)

1Initialising system timer

sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 4294967286ms

Console: colour dummy device 80x30

Calibrating delay loop... 94.61 BogoMIPS (lpj=473088)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

Internal error: Oops - undefined instruction: 0 [#1] ARM

CPU: 0    Not tainted  (3.8.5+ #204)

PC is at 0xfffffffc

LR is at 0xa001c958

pc : [<fffffffc>]    lr : [<a001c958>]    psr: 60000053

sp : a001c958  ip : 00000000  fp : a2c29f04

r10: 00000001  r9 : 00000000  r8 : a2c1da0c

r7 : 0000000f  r6 : 000080d0  r5 : a2c01400  r4 : a2c25e00

r3 : 00000000  r2 : 00000000  r1 : 00000000  r0 : a2c26000

Flags: nZCv  IRQs on  FIQs off  Mode SVC_32  ISA ARM  Segment kernel

Process (null) (pid: -481230803, stack limit = 0xe24ff43e)

Booting Linux on physical CPU 0x0

Linux version 3.8.5+ (tobias@zap) (gcc version 4.7.3 20130312 (release) [ARM/emb

edded-4_7-branch revision 196615] (GNU Tools for ARM Embedded Processors) ) #247

 Sun May 26 14:56:20 CEST 2013

CPU: ARM7TDMI [41007700] revision 0 (ARMv3), cr=00000000

CPU: VIVT data cache, VIVT instruction cache

Machine: LPC24XX SoC (Flattened Device Tree), model: LPC2468 Board

bootconsole [earlycon0] enabled

Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 12192

Kernel command line: earlyprintk console=/dev/console

PID hash table entries: 256 (order: -2, 1024 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory: 48MB = 48MB total

Memory: 48432k/48432k available, 720k reserved, 0K highmem

Virtual kernel memory layout:

    vector  : 0xa0000000 - 0xa0001000   (   4 kB)

    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

    vmalloc : 0x00000000 - 0xffffffff   (4095 MB)

    lowmem  : 0xa0000000 - 0xa3000000   (  48 MB)

      .text : 0x80000000 - 0x80123024   (1165 kB)

      .init : 0xa000a000 - 0xa000d000   (  12 kB)

      .data : 0xa0008000 - 0xa001c800   (  82 kB)

       .bss : 0xa001c800 - 0xa00437e4   ( 156 kB)

SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

NR_IRQS:16 nr_irqs:32 32

System timer is /soc/timer@E0004000

sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 4294967286ms

Console: colour dummy device 80x30

Calibrating delay loop... 55.29 BogoMIPS (lpj=276480)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

bio: create slab <bio-0> at 0

io scheduler noop registered (default)

Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled

brd: module loaded

turn off boot console earlycon0