BBB @ 1Ghz hangs with 10-STABLE (11-CURRENT is ok)

[Winston Smith]

After getting a 2014.01 u-boot built with Xuebing's patches, I found
that 10-STABLE hangs at some point after the kernel has configured the
usb hubs.  The abbreviated console log is below; since the kernel had
booted, I was able to get a stack trace (also included below).

However, the patched u-boot works ok with 11-CURRENT.  Looking at the
patches, it wasn't immediately apparent as to what exactly enables the
1Ghz mode ... maybe it's just having a newer u-boot?

Is there something specific in 11-CURRENT that enables/supports the
1Ghz operation?

Thanks!


-W
---


-Boot SPL 2014.01 (Apr 29 2014 - 18:25:45)
reading args
spl: error reading image args, err - -1
reading bb-uboot.img
reading bb-uboot.img


U-Boot 2014.01 (Apr 29 2014 - 18:25:45)

I2C:   ready
DRAM:  512 MiB
NAND:  0 MiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
*** Warning - readenv() failed, using default environment

Net:   <ethaddr> not set. Validating first E-fuse MAC
cpsw, usb_ether
Hit any key to stop autoboot:  0
mmc0 is current device
SD/MMC found on device 0
reading bb-uEnv.txt
reading bbubldr
251703 bytes read in 17 ms (14.1 MiB/s)
reading bboneblk.dtb
15278 bytes read in 5 ms (2.9 MiB/s)
## Starting application at 0x88000054 ...
Consoles: U-Boot console
Compatible U-Boot API signature found @9f62b240

FreeBSD/armv6 U-Boot loader, Revision 1.2
(root at freebsd, Tue Apr 29 12:08:39 EDT 2014)

DRAM: 512MB
Number of U-Boot devices: 2
U-Boot env: loaderdev not set, will probe all devices.
Found U-Boot device: disk
  Probing all disk devices...
  Checking unit=0 slice=<auto> partition=<auto>... good.
Loading /boot/defaults/loader.conf
/boot/kernel/kernel data=0x468f08+0x17d8dc syms=[0x4+0x84b30+0x4+0x501f3]
/boot/kernel/geom_label.ko text=0x50dc data=0x864+0x30
syms=[0x4+0x1020+0x4+0xfe2]

Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
Using DTB provided by U-Boot at address 0x0x80000100.
Kernel entry at 0x80200100...

...


Timecounters tick every 10.000 msec
usbus0: 480Mbps High Speed USB v2.0
usbus1: 480Mbps High Speed USB v2.0
ugen1.1: <Mentor Graphics> at usbus1
uhub0: <Mentor Graphics OTG Root HUB, class 9/0, rev 2.00/1.00, addr
1> on usbus1
ugen0.1: <Mentor Graphics> at usbus0
uhub1: <Mentor Graphics OTG Root HUB, class 9/0, rev 2.00/1.00, addr
1> on usbus0
mmcsd0: 4GB <SDHC SA04G 1.0 SN 628739603 MFG 09/2011 by 2 TM> at mmc0
48.0MHz/4bit/65535-block
uhub0: 1 port with 1 removable, self powered
uhub1: 1 port with 1 removable, self powered
random: unblocking device.

KDB: enter: Break to debugger
[ thread pid 10 tid 100002 ]
Stopped at      $d:     ldrb    r15, [r15, r15, ror r15]!
db> trace
Tracing pid 10 tid 100002 td 0xc279b320
db_trace_self() at db_trace_self
         pc = 0xc054086c  lr = 0xc022e3c0 (db_stack_trace+0xf4)
         sp = 0xdbe5da28  fp = 0xdbe5da40
        r10 = 0xc07e1850
db_stack_trace() at db_stack_trace+0xf4
         pc = 0xc022e3c0  lr = 0xc022dd30 (db_command+0x270)
         sp = 0xdbe5da48  fp = 0xdbe5dae8
         r4 = 0x00000000  r5 = 0x00000000
         r6 = 0x00000063
db_command() at db_command+0x270
         pc = 0xc022dd30  lr = 0xc022da94 (db_command_loop+0x60)
         sp = 0xdbe5daf0  fp = 0xdbe5db00
         r4 = 0xc05829b1  r5 = 0xc059dbfc
         r6 = 0xc07e183c  r7 = 0xdbe5dcd0
         r8 = 0xc067e3a0  r9 = 0xc067e3a4
        r10 = 0xc063b060
db_command_loop() at db_command_loop+0x60
         pc = 0xc022da94  lr = 0xc023045c (db_trap+0xd8)
         sp = 0xdbe5db08  fp = 0xdbe5dc28
         r4 = 0x00000000  r5 = 0xc07e1848
         r6 = 0xc067e3d0
db_trap() at db_trap+0xd8
         pc = 0xc023045c  lr = 0xc0399170 (kdb_trap+0xd4)
         sp = 0xdbe5dc30  fp = 0xdbe5dc50
         r4 = 0x00000000  r5 = 0x00000001
         r6 = 0xc067e3d0  r7 = 0xdbe5dcd0
kdb_trap() at kdb_trap+0xd4
         pc = 0xc0399170  lr = 0xc05535a8 (undefinedinstruction+0x2b0)
         sp = 0xdbe5dc58  fp = 0xdbe5dcc8
         r4 = 0x00000000  r5 = 0xc0553240
         r6 = 0x00000000  r7 = 0xe7ffffff
         r8 = 0xc279b320  r9 = 0xdbe5dcd0
        r10 = 0xc03989a4
undefinedinstruction() at undefinedinstruction+0x2b0
         pc = 0xc05535a8  lr = 0xc0542374 (exception_exit)
         sp = 0xdbe5dcd0  fp = 0xdbe5dd28
         r4 = 0x00000001  r5 = 0xdbe5ddb8
         r6 = 0xc2805b74  r7 = 0x00060000
         r8 = 0x00000001  r9 = 0xc064014c
        r10 = 0xc2805a00
exception_exit() at exception_exit
         pc = 0xc0542374  lr = 0xc0398994 (kdb_break+0x50)
         sp = 0xdbe5dd24  fp = 0xdbe5dd28
         r0 = 0xc067e3b4  r1 = 0x00000000
         r2 = 0x00000001  r3 = 0x60000193
         r4 = 0x00000001  r5 = 0xdbe5ddb8
         r6 = 0xc2805b74  r7 = 0x00060000
         r8 = 0x00000001  r9 = 0xc064014c
        r10 = 0xc2805a00 r12 = 0x00000000
$a() at $a
         pc = 0xc03989a8  lr = 0xc02612f0 (uart_intr+0x9c)
         sp = 0xdbe5dd30  fp = 0xdbe5dd70
         r4 = 0x00000000
uart_intr() at uart_intr+0x9c
         pc = 0xc02612f0  lr = 0xc0333050 (intr_event_handle+0x80)
         sp = 0xdbe5dd78  fp = 0xdbe5dd98
         r4 = 0xc267ae00  r5 = 0xdbe5ddb8
         r6 = 0xc0666dd0  r7 = 0xc279b320
         r8 = 0x00000000  r9 = 0xc0597b05
        r10 = 0xc27f2c00
intr_event_handle() at intr_event_handle+0x80
         pc = 0xc0333050  lr = 0xc0543598 (arm_handler_execute+0x50)
         sp = 0xdbe5dda0  fp = 0xdbe5ddb0
         r4 = 0xdbe5ddb8  r5 = 0x00000048
         r6 = 0xc0666dd0  r7 = 0xc07def68
         r8 = 0x00274e80  r9 = 0xc0668184
        r10 = 0xc08dd004
arm_handler_execute() at arm_handler_execute+0x50
         pc = 0xc0543598  lr = 0xc0561118 (irq_entry+0x6c)
         sp = 0xdbe5ddb8  fp = 0xdbe5de10
         r4 = 0x00000001  r5 = 0xc059fdf3
         r6 = 0xc07e3490  r7 = 0xc067df4c
irq_entry() at irq_entry+0x6c
         pc = 0xc0561118  lr = 0xc0543bec (cpu_idle+0x24)
         sp = 0xdbe5de0c  fp = 0xdbe5de10
         r0 = 0x00000001  r1 = 0x00015924
         r2 = 0x00000002  r3 = 0x00000000
         r4 = 0x00000001  r5 = 0xc059fdf3
         r6 = 0xc07e3490  r7 = 0xc067df4c
         r8 = 0x00274e80  r9 = 0xc0668184
        r10 = 0xc08dd004 r12 = 0x00000000
sched_runnable() at sched_runnable
         pc = 0xc038773c  lr = 0xc0388a0c (sched_idletd+0xc4)
         sp = 0xdbe5de18  fp = 0xdbe5de38
sched_idletd() at sched_idletd+0xc4
         pc = 0xc0388a0c  lr = 0xc03307ac (fork_exit+0x88)
         sp = 0xdbe5de40  fp = 0xdbe5de58
         r4 = 0xc279b320  r5 = 0xc2798320
         r6 = 0xc0388948  r7 = 0x00000000
         r8 = 0xdbe5de60  r9 = 0x00000000
        r10 = 0x00000000
fork_exit() at fork_exit+0x88
         pc = 0xc03307ac  lr = 0xc0551b0c (fork_trampoline+0x14)
         sp = 0xdbe5de60  fp = 0x00000000
         r4 = 0xc0388948  r5 = 0x00000000
         r6 = 0x3bffcfdb  r7 = 0xf9fcd7ef
         r8 = 0x00000000
fork_trampoline() at fork_trampoline+0x14
         pc = 0xc0551b0c  lr = 0xc0551b0c (fork_trampoline+0x14)
         sp = 0xdbe5de60  fp = 0x00000000
Unable to unwind further
db>