#254 cat debug mmr info on bf526/527/548 would make kernel panic.

[panmingquan]

cat debug mmr info on bf526 would make kernel panic.

Booting kernel from Legacy Image at 02000000 ...

Image Name: bf526-0.0-3.15.0-ADI-2014R1-pre-
Created: 2014-07-01 16:10:10 UTC
Image Type: Blackfin Linux Kernel Image (gzip compressed)
Data Size: 4252795 Bytes = 4.1 MiB
Load Address: 00001000
Entry Point: 0027ecb0
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
Starting Kernel at = 0027ecb0
Linux version 3.15.0-ADI-2014R1-pre-00354-gc11e7cc-dirty (test@uclinux81-bf526) (gcc version 4.3.5 (ADI-master/git-a2bfd7b) ) #4 Wed Jul 2 00:10:00 CST 2014
register early platform devices
bootconsole [early_shadow0] enabled
bootconsole [early_BFuart1] enabled
early printk enabled on early_BFuart1
Board Memory: 64MB
Kernel Managed Memory: 64MB
Memory map:
fixedcode = 0x00000400-0x00000490
text = 0x00001000-0x001aa398
rodata = 0x001aa398-0x0023a55c
bss = 0x0023b000-0x0025148c
data = 0x002514a0-0x00276000
stack = 0x00274000-0x00276000
init = 0x00276000-0x00545000
available = 0x00545000-0x03f00000
DMA Zone = 0x03f00000-0x04000000
Hardware Trace active and enabled
Boot Mode: 1
Blackfin support (C) 2004-2010 Analog Devices, Inc.
Compiled for ADSP-BF526 Rev 0.0
Blackfin Linux support by http://blackfin.uclinux.org/
Processor Speed: 400 MHz core clock and 80 MHz System Clock
NOMPU: setting up cplb tables
Instruction Cache Enabled for CPU0
External memory: cacheable in instruction cache
Data Cache Enabled for CPU0
External memory: cacheable (write-back) in data cache
Built 1 zonelists in Zone order, mobility grouping off. Total pages: 16002
Kernel command line: root=/dev/mtdblock0 rw ip=10.100.4.50 earlyprintk=serial,uart1,57600 console=ttyBF1,57600 ip=10.100.4.50:10.100.4.174:10.100.4.174:255.255.255.0:bf526-ezbrd:eth0:off
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: 58508K/64512K available (1700K kernel code, 146K rwdata, 576K rodata, 2876K init, 89K bss, 6004K reserved, 1024K DMA)
NR_IRQS:159
Configuring Blackfin Priority Driven Interrupts
Console: colour dummy device 80x25
Calibrating delay loop... 792.57 BogoMIPS (lpj=1585152)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
devtmpfs: initialized
Blackfin Scratchpad data SRAM: 4 KB
Blackfin L1 Data A SRAM: 16 KB (16 KB free)
Blackfin L1 Data B SRAM: 16 KB (16 KB free)
Blackfin L1 Instruction SRAM: 48 KB (42 KB free)
NET: Registered protocol family 16
Blackfin DMA Controller
ezbrd_init(): registering device resources
SCSI subsystem initialized
bfin-spi bfin-spi.0: master is unqueued, this is deprecated
bfin-spi bfin-spi.0: Blackfin on-chip SPI Controller Driver, Version 1.0, regs@ffc00500, dma channel@7
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
i2c-bfin-twi i2c-bfin-twi.0: Blackfin on-chip I2C TWI Contoller, regs_base@ffc01400
NET: Registered protocol family 2
TCP established hash table entries: 1024 (order: 0, 4096 bytes)
TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
TCP: Hash tables configured (established 1024 bind 1024)
TCP: reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
debug-mmrs: setting up Blackfin MMR debugfs
msgmni has been set to 114
io scheduler noop registered (default)
bfin-uart: Blackfin serial driver
bfin-uart.1: ttyBF1 at MMIO 0xffc02000 (irq = 31, base_baud = 5000000) is a BFIN-UART
console [ttyBF1] enabled
console [ttyBF1] enabled
bootconsole [early_BFuart1] disabled
bootconsole [early_BFuart1] disabled
bootconsole [early_shadow0] disabled
bfin-otp: initialized
brd: module loaded
physmap platform flash device: 00400000 at 20000000
physmap-flash.0: Found 1 x16 devices at 0x0 in 16-bit bank. Manufacturer ID 0x000020 Chip ID 0x008815
Intel/Sharp Extended Query Table at 0x0039
Intel/Sharp Extended Query Table at 0x0039
Intel/Sharp Extended Query Table at 0x0039
Intel/Sharp Extended Query Table at 0x0039
Intel/Sharp Extended Query Table at 0x0039
cfi_cmdset_0001: Erase suspend on write enabled
Creating 3 MTD partitions on "physmap-flash.0":
0x000000000000-0x000000040000 : "bootloader(nor)"
0x000000040000-0x000000200000 : "linux kernel(nor)"
0x000000200000-0x000000400000 : "file system(nor)"
m25p80 spi0.1: sst25wf040 (512 Kbytes)
Creating 2 MTD partitions on "m25p80":
0x000000000000-0x000000040000 : "bootloader(spi)"
0x000000040000-0x000000080000 : "linux kernel(spi)"
libphy: bfin_mii_bus: probed
bfin_mac: attached PHY driver [Generic PHY] (mii_bus:phy_addr=bfin_mii_bus-0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=15)@sclk=80MHz)
bfin_mac bfin_mac.0 eth0: Blackfin on-chip Ethernet MAC driver, Version 1.1
usbcore: registered new interface driver usb-storage
rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0
bfin_wdt: initialized: timeout=20 sec (nowayout=0)
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
TCP: cubic registered
NET: Registered protocol family 17
rtc-bfin rtc-bfin: setting system clock to 2004-05-31 03:04:50 UTC (1085972690)
dma_alloc_init: dma_page @ 0x027c4000 - 256 pages at 0x03f00000
IP-Config: Complete:
device=eth0, hwaddr=00:e0:22:fe:63:4d, ipaddr=10.100.4.50, mask=255.255.255.0, gw=10.100.4.174
host=bf526-ezbrd, domain=, nis-domain=(none)
bootserver=10.100.4.174, rootserver=10.100.4.174, rootpath=
Freeing unused kernel memory: 2876K (00276000 - 00545000)
bfin_mac bfin_mac.0 eth0: Link is Up - 100Mbps/Full - flow control off

BusyBox v1.22.1 (2014-07-01 03:22:19 CST) hush - the humble shell

root:/>successful boot attempt ifconfig eth0 10.100.4.50
root:/> Ethernet may has been activated already!
random: nonblocking pool is initialized
version
kernel: Linux release 3.15.0-ADI-2014R1-pre-00354-gc11e7cc-dirty, build #4 Wed Jul 2 00:10:00 CST 2014
toolchain: /home/test/workspace/src/kernel/label/BF526-EZBRD-STD/output/host/usr/bin/bfin-uclinux-gcc release gcc version 4.3.5 (ADI-master/git-a2bfd7b)
user-dist: release git-fb95edb, build #1 Tue Jul 1 03:32:24 CST 2014
root:/>
Linux version: 3.15.0-ADI-2014R1-pre-00354-gc11e7cc-dirty
GCC version: 4.3.5 (ADI-master/git-a2bfd7b)
user-dist version: git-fb95edb

** STEP 3: Start testing

root:/> find /sys/kernel/debug/blackfin/ -type f -print -exec cat '{}' \;
/sys/kernel/debug/blackfin/port/MISCPORT_SLEW
0x0000
/sys/kernel/debug/blackfin/port/MISCPORT_HYSTERESIS
0x0000
/sys/kernel/debug/blackfin/port/MISCPORT_DRIVE
0x0555
/sys/kernel/debug/blackfin/port/PORTH_SLEW
0x0000
/sys/kernel/debug/blackfin/port/PORTH_MUX
0x0005
/sys/kernel/debug/blackfin/port/PORTH_HYSTERESIS
0x0000
/sys/kernel/debug/blackfin/port/PORTH_DRIVE
0x5555
/sys/kernel/debug/blackfin/port/PORTH_FER
0x01ff
/sys/kernel/debug/blackfin/port/PORTG_SLEW
0x0000
/sys/kernel/debug/blackfin/port/PORTG_MUX
0x1002
/sys/kernel/debug/blackfin/port/PORTG_HYSTERESIS
0x0000
/sys/kernel/debug/blackfin/port/PORTG_DRIVE
0x5555
/sys/kernel/debug/blackfin/port/PORTG_FER
0xc01e
/sys/kernel/debug/blackfin/port/PORTF_SLEW
0x0000
/sys/kernel/debug/blackfin/port/PORTF_MUX
0x0800
/sys/kernel/debug/blackfin/port/PORTF_HYSTERESIS
0x0105
/sys/kernel/debug/blackfin/port/PORTF_DRIVE
0x5555
/sys/kernel/debug/blackfin/port/PORTF_FER
...
/sys/kernel/debug/blackfin/usb/USB_EP_NI0_RXTYPE
0x0000
/sys/kernel/debug/blackfin/usb/USB_EP_NI0_TXINTERVAL
0x0000
/sys/kernel/debug/blackfin/usb/USB_EP_NI0_TXTYPE
0x0000
/sys/kernel/debug/blackfin/usb/USB_EP_NI0_RXCOUNT
0x0000
/sys/kernel/debug/blackfin/usb/USB_EP_NI0_RXCSR
0x0000
/sys/kernel/debug/blackfin/usb/USB_EP_NI0_RXMAXP
0x0000
/sys/kernel/debug/blackfin/usb/USB_EP_NI0_TXCSR
0x0000
/sys/kernel/debug/blackfin/usb/USB_EP_NI0_TXMAXP
0x0000
/sys/kernel/debug/blackfin/usb/USB_SRP_CLKDIV
0x0000
/sys/kernel/debug/blackfin/usb/USB_PLLOSC_CTRL
0x3028
/sys/kernel/debug/blackfin/usb/USB_PHY_TEST
System MMR Error

5 - An error occurred due to an invalid access to an System MMR location

5 Possible reason: a 32-bit register is accessed with a 16-bit instruction

5 or a 16-bit register is accessed with a 32-bit instruction.
Kernel OOPS in progress
HW Error context
CURRENT PROCESS:
COMM=cat PID=557 CPU=0
TEXT = 0x00300040-0x003691e0 DATA = 0x00369200-0x00384740
BSS = 0x00384740-0x00386050 USER-STACK = 0x00392f2c

return address: [0x00071216]; contents of:
0x000711f0: 3006 e309 bf17 6ce6 3007 0127 05a4 0010
0x00071200: 639f 6ce6 3007 0127 05a4 0010 304e 916a
0x00071210: a3a8 64a1 0062 [3038] 0c00 17eb a3ea a170
0x00071220: a1b1 307d 6447 b0f0 b131 3007 60c1 e302

CPU: 0 PID: 557 Comm: cat Not tainted 3.15.0-ADI-2014R1-pre-00354-gc11e7cc-dirty #4
task: 020b8060 ti: 020ce000 task.ti: 020ce000
ADSP-BF526-0.0 400(MHz CCLK) 80(MHz SCLK) (mpu off)
Linux version 3.15.0-ADI-2014R1-pre-00354-gc11e7cc-dirty (test@uclinux81-bf526) (gcc version 4.3.5 (ADI-master/git-a2bfd7b) ) #4 Wed Jul 2 00:10:00 CST 2014

SEQUENCER STATUS: Not tainted
SEQSTAT: 0000a03f IPEND: 8030 IMASK: 0000 SYSCFG: 0006
Global Interrupts Disabled (IPEND[4])
Peripheral interrupts masked off
Kernel interrupts masked off
HWERRCAUSE: 0x2
EXCAUSE : 0x3f
interrupts disabled
physical IVG5 asserted : <0xffa00af8> { _evt_ivhw + 0x0 }
physical IVG15 asserted : <0xffa00de8> { _evt_system_call + 0x0 }
logical irq 6 mapped : <0xffa002b0> { _bfin_coretmr_interrupt + 0x0 }
logical irq 21 mapped : <0x0012acb8> { _bfin_rtc_interrupt + 0x0 }
logical irq 27 mapped : <0x0012ce58> { _bfin_twi_interrupt_entry + 0x0 }
logical irq 31 mapped : <0x000dc1ec> { _bfin_serial_dma_rx_int + 0x0 }
logical irq 32 mapped : <0x000dc000> { _bfin_serial_dma_tx_int + 0x0 }
logical irq 35 mapped : <0x0010d364> { _bfin_mac_interrupt + 0x0 }
RETE: <0x00000000> / Maybe null pointer? /
RETN: <0x020d0000> / kernel dynamic memory (maybe user-space) /
RETX: <0x00304272> / kernel dynamic memory (maybe user-space) /
RETS: <0x00071216> { _simple_attr_read + 0x7e }
PC : <0x00071216> { _simple_attr_read + 0x7e }
PROCESSOR STATE:
R0 : 00000000 R1 : 00000000 R2 : 00000000 R3 : 00000000
R4 : 00001000 R5 : 00391e24 R6 : 027ba680 R7 : 00000000
P0 : 027f2720 P1 : 020cfe88 P2 : ffc039ec P3 : 00000000
P4 : 020cfef0 P5 : 027ba640 FP : 00391de8 SP : 020cfd98
LB0: 0030f34b LT0: 0030f342 LC0: 0000000f
LB1: 02f0f5fb LT1: 02f0f5b8 LC1: 00000000
B0 : 00000000 L0 : 00000000 M0 : 00000004 I0 : 00392fdf
B1 : 00000000 L1 : 00000000 M1 : 00000000 I1 : 0037e7ac
B2 : 00000000 L2 : 00000000 M2 : 00000000 I2 : 00392e70
B3 : 00000000 L3 : 00000000 M3 : 00000000 I3 : 00000000
A0.w: 0000147a A0.x: 00000000 A1.w: 0000147a A1.x: 00000000
USP : 00391ddc ASTAT: 02002021

Hardware Trace:
0 Target : <0x00004170> { _trap_c + 0x0 }
Source : <0xffa00ba2> { _evt_ivhw + 0xaa } JUMP.L
1 Target : <0xffa00b84> { _evt_ivhw + 0x8c }
Source : <0xffa00b76> { _evt_ivhw + 0x7e } IF !CC JUMP pcrel
2 Target : <0xffa00af8> { _evt_ivhw + 0x0 }
FAULT : <0x000981b4> { _debugfs_u16_get + 0x10 } RTS
3 Target : <0x000981a4> { _debugfs_u16_get + 0x0 }
Source : <0x00071214> { _simple_attr_read + 0x7c } CALL (P2)
4 Target : <0x0007120c> { _simple_attr_read + 0x74 }
Source : <0x000711d4> { _simple_attr_read + 0x3c } IF CC JUMP pcrel (BP)
5 Target : <0x000711c0> { _simple_attr_read + 0x28 }
Source : <0x001a96b4> { _mutex_lock_interruptible + 0x38 } RTS
6 Target : <0x001a9688> { _mutex_lock_interruptible + 0xc }
Source : <0x001a87a8> { cond_resched + 0x20 } RTS
7 Target : <0x001a8788> { cond_resched + 0x0 }
Source : <0x001a9684> { _mutex_lock_interruptible + 0x8 } JUMP.L
8 Target : <0x001a967c> { _mutex_lock_interruptible + 0x0 }
Source : <0x000711bc> { _simple_attr_read + 0x24 } JUMP.L
9 Target : <0x00071198> { _simple_attr_read + 0x0 }
Source : <0x00058e44> { _vfs_read + 0x5c } CALL (P2)
10 Target : <0x00058e24> { _vfs_read + 0x3c }
Source : <0x0005830e> { _rw_verify_area + 0x52 } RTS
11 Target : <0x000582bc> { _rw_verify_area + 0x0 }
Source : <0x00058e20> { _vfs_read + 0x38 } JUMP.L
12 Target : <0x00058e14> { _vfs_read + 0x2c }
Source : <0xffa00116> { access_ok + 0x5e } RTS
13 Target : <0xffa0010e> { access_ok + 0x56 }
Source : <0xffa00128> { access_ok + 0x70 } JUMP.S
14 Target : <0xffa00122> { access_ok + 0x6a }
Source : <0xffa000f2> { access_ok + 0x3a } IF !CC JUMP pcrel (BP)
15 Target : <0xffa000b8> { access_ok + 0x0 }
Source : <0x00058e10> { _vfs_read + 0x28 } CALL pcrel
Kernel Stack
Stack info:
SP: [0x020cff24] <0x020cff24> / kernel dynamic memory (maybe user-space) /
FP: (0x020cffe0)
Memory from 0x020cff20 to 020d0000
020cff20: 00000003 [00304272] 00008000 00002000 00000000 020d0000 00304272 00304272
020cff40: 00320ad0 ffa00e4c 02002020 02f0f5fb 0030f34b 02f0f5b8 0030f342 00000000
020cff60: 0000000f 0000147a 00000000 0000147a 00000000 00000000 00000000 00000000
020cff80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
020cffa0: 00000004 00000000 00392e70 0037e7ac 00392fdf 00391ddc 00391de8 003858b8
020cffc0: 00000001 00000000 00385e30 <00392f60> 00000003 00001000 00391e24 00000003
020cffe0:(00000000)<00392f60> 00001000 00391e24 00000003 00000003 00000003 00000006
Return addresses in stack:
address : <0x00392f60> / kernel dynamic memory (maybe user-space) /
frame 1 : <0x00392f60> / kernel dynamic memory (maybe user-space) /
Modules linked in:
Kernel panic - not syncing: Kernel exception
---[ end Kernel panic - not syncing: Kernel exception

[panmingquan]

It looks this issue also happened for bf527 and bf548, and they fail from last release.

while on bf537 and bf533, this case can pass.

[andre]

Fixed in commit a08e6b62fbfdb2744cafec77ba7a98a87619d688

[panmingquan]

yes, it passes now on bf526/527/548!

bfin> bootm 0x2000000

Booting kernel from Legacy Image at 02000000 ...

Image Name: bf526-0.0-3.16.0-ADI-2014R1-pre-
Created: 2014-09-08 2:25:45 UTC
Image Type: Blackfin Linux Kernel Image (gzip compressed)
Data Size: 4411337 Bytes = 4.2 MiB
Load Address: 00001000
Entry Point: 00284da4
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
Starting Kernel at = 00284da4
Linux version 3.16.0-ADI-2014R1-pre-00412-ga08e6b6-dirty (test@uclinux81-bf526) (gcc version 4.3.5 (ADI-master/git-a2bfd7b) ) #4 Mon Sep 8 10:25:35 CST 2014
register early platform devices
bootconsole [early_shadow0] enabled
bootconsole [early_BFuart1] enabled
early printk enabled on early_BFuart1
Board Memory: 64MB
Kernel Managed Memory: 64MB
Memory map:
fixedcode = 0x00000400-0x00000490
text = 0x00001000-0x001aef08
rodata = 0x001aef08-0x002411b0
bss = 0x00242000-0x002584bc
data = 0x002584c0-0x0027c000
stack = 0x0027a000-0x0027c000
init = 0x0027c000-0x0056f000
available = 0x0056f000-0x03f00000
DMA Zone = 0x03f00000-0x04000000
Hardware Trace active and enabled
Boot Mode: 1
Blackfin support (C) 2004-2010 Analog Devices, Inc.
Compiled for ADSP-BF526 Rev 0.0
Blackfin Linux support by http://blackfin.uclinux.org/
Processor Speed: 400 MHz core clock and 80 MHz System Clock
NOMPU: setting up cplb tables
Instruction Cache Enabled for CPU0
External memory: cacheable in instruction cache
Data Cache Enabled for CPU0
External memory: cacheable (write-back) in data cache
Built 1 zonelists in Zone order, mobility grouping off. Total pages: 16002
Kernel command line: root=/dev/mtdblock0 rw ip=10.100.4.50 earlyprintk=serial,uart1,57600 console=ttyBF1,57600 ip=10.100.4.50:10.100.4.174:10.100.4.174:255.255.255.0:bf526-ezbrd:eth0:off
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: 58340K/64512K available (1719K kernel code, 142K rwdata, 584K rodata, 3020K init, 89K bss, 6172K reserved, 1024K DMA)
NR_IRQS:159
Configuring Blackfin Priority Driven Interrupts
Console: colour dummy device 80x25
Calibrating delay loop... 792.57 BogoMIPS (lpj=1585152)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
devtmpfs: initialized
Blackfin Scratchpad data SRAM: 4 KB
Blackfin L1 Data A SRAM: 16 KB (16 KB free)
Blackfin L1 Data B SRAM: 16 KB (16 KB free)
Blackfin L1 Instruction SRAM: 48 KB (42 KB free)
NET: Registered protocol family 16
Blackfin DMA Controller
ezbrd_init(): registering device resources
SCSI subsystem initialized
bfin-spi bfin-spi.0: master is unqueued, this is deprecated
bfin-spi bfin-spi.0: Blackfin on-chip SPI Controller Driver, Version 1.0, regs@ffc00500, dma channel@7
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
i2c-bfin-twi i2c-bfin-twi.0: Blackfin on-chip I2C TWI Contoller, regs_base@ffc01400
NET: Registered protocol family 2
TCP established hash table entries: 1024 (order: 0, 4096 bytes)
TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
TCP: Hash tables configured (established 1024 bind 1024)
TCP: reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
debug-mmrs: setting up Blackfin MMR debugfs
msgmni has been set to 113
io scheduler noop registered (default)
bfin-uart: Blackfin serial driver
bfin-uart.1: ttyBF1 at MMIO 0xffc02000 (irq = 31, base_baud = 5000000) is a BFIN-UART
console [ttyBF1] enabled
console [ttyBF1] enabled
bootconsole [early_BFuart1] disabled
bootconsole [early_BFuart1] disabled
bootconsole [early_shadow0] disabled
bfin-otp: initialized
brd: module loaded
physmap platform flash device: 00400000 at 20000000
physmap-flash.0: Found 1 x16 devices at 0x0 in 16-bit bank. Manufacturer ID 0x000020 Chip ID 0x008815
Intel/Sharp Extended Query Table at 0x0039
Intel/Sharp Extended Query Table at 0x0039
Intel/Sharp Extended Query Table at 0x0039
Intel/Sharp Extended Query Table at 0x0039
Intel/Sharp Extended Query Table at 0x0039
cfi_cmdset_0001: Erase suspend on write enabled
Creating 3 MTD partitions on "physmap-flash.0":
0x000000000000-0x000000040000 : "bootloader(nor)"
0x000000040000-0x000000200000 : "linux kernel(nor)"
0x000000200000-0x000000400000 : "file system(nor)"
m25p80 spi0.1: sst25wf040 (512 Kbytes)
Creating 2 MTD partitions on "m25p80":
0x000000000000-0x000000040000 : "bootloader(spi)"
0x000000040000-0x000000080000 : "linux kernel(spi)"
libphy: bfin_mii_bus: probed
bfin_mac: attached PHY driver [Generic PHY] (mii_bus:phy_addr=bfin_mii_bus-0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=15)@sclk=80MHz)
bfin_mac bfin_mac.0 eth0: Blackfin on-chip Ethernet MAC driver, Version 1.1
usbcore: registered new interface driver usb-storage
rtc (null): invalid alarm value: 1900-1-31 0:0:0
rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0
bfin_wdt: initialized: timeout=20 sec (nowayout=0)
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
TCP: cubic registered
NET: Registered protocol family 17
rtc-bfin rtc-bfin: setting system clock to 2004-05-31 03:09:33 UTC (1085972973)
dma_alloc_init: dma_page @ 0x0280c000 - 256 pages at 0x03f00000
IP-Config: Complete:
device=eth0, hwaddr=00:e0:22:fe:63:4d, ipaddr=10.100.4.50, mask=255.255.255.0, gw=10.100.4.174
host=bf526-ezbrd, domain=, nis-domain=(none)
bootserver=10.100.4.174, rootserver=10.100.4.174, rootpath=
Freeing unused kernel memory: 3020K (0027c000 - 0056f000)
bfin_mac bfin_mac.0 eth0: Link is Up - 100Mbps/Full - flow control off

BusyBox v1.22.1 (2014-09-07 11:55:49 CST) hush - the humble shell

root:/>successful boot attempt ifconfig eth0 10.100.4.50
root:/> Ethernet may has been activated already!
random: nonblocking pool is initialized
version
kernel: Linux release 3.16.0-ADI-2014R1-pre-00412-ga08e6b6-dirty, build #4 Mon Sep 8 10:25:35 CST 2014
toolchain: /home/test/workspace/src/kernel/label/BF526-EZBRD-STD/output/host/usr/bin/bfin-uclinux-gcc release gcc version 4.3.5 (ADI-master/git-a2bfd7b)
user-dist: release git-426e749, build #2 Mon Sep 8 10:12:57 CST 2014
root:/>
Linux version: 3.16.0-ADI-2014R1-pre-00412-ga08e6b6-dirty
GCC version: 4.3.5 (ADI-master/git-a2bfd7b)
user-dist version: git-426e749

** STEP 3: Start testing

root:/> find /sys/kernel/debug/ -name blackfin -type d
/sys/kernel/debug/blackfin
root:/> blackfin directory exists!
Case 1 ...PASS

Case 1 ...PASS
find /sys/kernel/debug/blackfin/ -type f -print -exec cat '{}' \;
/sys/kernel/debug/blackfin/port/MISCPORT_SLEW
0x0000
/sys/kernel/debug/blackfin/port/MISCPORT_HYSTERESIS
0x0000
/sys/kernel/debug/blackfin/port/MISCPORT_DRIVE
0x0555
/sys/kernel/debug/blackfin/port/PORTH_SLEW
0x0000
/sys/kernel/debug/blackfin/port/PORTH_MUX
0x0005
/sys/kernel/debug/blackfin/port/PORTH_HYSTERESIS
0x0000
/sys/kernel/debug/blackfin/port/PORTH_DRIVE
0x5555
/sys/kernel/debug/blackfin/port/PORTH_FER
0x01ff
/sys/kernel/debug/blackfin/port/PORTG_SLEW
0x0000
/sys/kernel/debug/blackfin/port/PORTG_MUX
0x1002
/sys/kernel/debug/blackfin/port/PORTG_HYSTERESIS
0x0000
/sys/kernel/debug/blackfin/port/PORTG_DRIVE
...

/sys/kernel/debug/blackfin/core_regs/syscfg
0x00000006
/sys/kernel/debug/blackfin/core_regs/seqstat
0x00002000
/sys/kernel/debug/blackfin/core_regs/emudat
0xacc196a3
/sys/kernel/debug/blackfin/core_regs/cycles2
0x0000000a
/sys/kernel/debug/blackfin/core_regs/cycles
0xa754afb5
/sys/kernel/debug/blackfin/core_regs/last_seqstat
0x00000000
/sys/kernel/debug/blackfin/core_regs/sclk
0x04c4b400
/sys/kernel/debug/blackfin/core_regs/cclk
0x17d78400
root:/>
Case 1 ...PASS

Case 1 ...PASS

DEBUG MMRS TEST ............[PASS]
Test Period is: 115 seconds.
close.