[#6012] In bf537/bf533 latest u-boot, DMA test in L1 inst sometimes triggers undef inst exception

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[#6012] In bf537/bf533 latest u-boot, DMA test in L1 inst sometimes triggers undef inst exception

Submitted By: Vivi Li

Open Date

2010-04-22 05:19:16    

Priority:

Medium     Assignee:

Nobody

Category:

N/A     Fixed In Release:

N/A

Found In Release:

2010R1     Status:

Open

Board:

N/A     Processor:

BF533

Silicon Revision:

    Resolution:

Assigned (Not Start)

Is the bug repeatable?:

N/A     

Summary: In bf537/bf533 latest u-boot, DMA test in L1 inst sometimes triggers undef inst exception

Details:

 

In bf537-stamp/bf533-stamp latest u-boot, kgdb handles exception during DMA test.

 

DMA test only failed on this plat form with bellow clock setting.

icache is on, dcache is either on or off.

 

This is found in regression and I haven't reproduced it yet. No such bug before Mar, 25th.

 

--

U-Boot 2010.03-svn2249 (ADI-2010R1-pre) (Apr 22 2010 - 01:00:38)

 

CPU:   ADSP bf533-0.3 (Detected Rev: 0.3) (bypass boot)

Board: ADI BF533 Stamp board

       Support: http://blackfin.uclinux.org/

Clock: VCO: 398.131 MHz, Core: 398.131 MHz, System: 79.626 MHz

RAM:   128 MB

Flash:  4 MB

In:    serial

Out:   serial

Err:   serial

KGDB:  [on serial] ready

Net:   SMC91111-0

Hit any key to stop autoboot:  9 ^H^H^H 0

bfin>

bfin> icache on

Instruction Cache is ON

bfin>

bfin> dcache on

Data (writethrough) Cache is ON

bfin>

bfin> tftp 0xffa0b000 add.bin

SMC91111: MAC ba:5f:37:c8:87:b3

Using SMC91111-0 device

TFTP from server 10.100.4.174; our IP address is 10.100.4.50

Filename 'add.bin'.

Load address: 0xffa0b000

Loading: *^H#

done

Bytes transferred = 28 (1c hex)

bfin>

bfin> go 0xffa0b000

go 0xffa0b000

## Starting application at 0xFFA0B000 ...

kgdb: handle_exception; trap [0x4]

$T0435:a0aea0ff;0e:48f1f507;#58sending md.b 0x01000090

$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;

#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;

#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;

...

--

 

Follow-ups

 

--- Mike Frysinger                                           2010-04-22 10:28:15

what exactly is the regression ?  the fact that the dma test crashed, or the

fact that kgdb was run instead of the dump crash message ?

 

when kgdb is enabled, any unhandled exception invokes kgdb automatically so

that people can connect and debug the issue.

 

--- Vivi Li                                                  2010-04-29 02:54:10

This bug appeared between 2010_03_25 and 2010_04_19.

No kgdb related code is modified during that period, but u-boot version bumped

to 2010.03.

 

--- Mike Frysinger                                           2010-04-29 03:05:10

that doesnt really help by itself.  i dont know what the "dma test"

is, i dont know where to find the "add.bin" file, and the output

contains no trace information.

 

ive fixed trunk u-boot to always dump the trace info before going into kgdb,

but we're not going to change the behavior of invoking kgdb when a crash occurs.

 

--- Vivi Li                                                  2010-04-29 04:15:44

Regression test is run by script u-boot/u-boot_test_script/test-uboot.exp

add.bin is attached.

 

--- Mike Frysinger                                           2010-04-29 04:20:12

any files u-boot_test_script/ references should be in svn

 

--- Vivi Li                                                  2010-04-29 04:42:17

Files are checked in.

Some uImages are also needed. They are built locally, no need to back up.

 

--- Mike Frysinger                                           2010-04-29 15:09:24

it's working for me:

 

U-Boot 2010.03-00038-gec8f30a (ADI-2010R1-pre) (Apr 29 2010 - 14:58:54)

 

CPU:   ADSP bf533-0.3 (Detected Rev: 0.3) (bypass boot)

Board: ADI BF533 Stamp board

       Support: http://blackfin.uclinux.org/

Clock: VCO: 497.664 MHz, Core: 497.664 MHz, System: 82.944 MHz

RAM:   128 MB

Flash:  4 MB

In:    serial

Out:   serial

Err:   serial

KGDB:  [on serial] ready

Net:   SMC91111-0

Hit any key to stop autoboot:  0

bfin> t 0xffa0b000 add.bin

SMC91111: MAC 00:e0:22:fe:05:3f

Using SMC91111-0 device

TFTP from server 192.168.1.2; our IP address is 192.168.1.15

Filename 'add.bin'.

Load address: 0xffa0b000

Loading: #

done

Bytes transferred = 28 (1c hex)

bfin> md.b 0xffa0b000 1c

ffa0b000: 00 e1 c2 00 01 e1 1c 00 08 e1 90 00 48 e1 00 01    ............H...

ffa0b010: 02 c4 01 06 c0 8a 24 00 10 00 00 00    ......$.....

bfin> g 0xffa0b000

## Starting application at 0xFFA0B000 ...

## Application terminated, rc = 0xC2

bfin>

 

--- Vivi Li                                                  2010-05-05 04:10:31

Something more shows in latest log.

 

--

U-Boot 2010.03-svn2258 (ADI-2010R1-pre) (May 05 2010 - 09:52:01)

 

CPU:   ADSP bf533-0.3 (Detected Rev: 0.3) (bypass boot)

Board: ADI BF533 Stamp board

       Support: http://blackfin.uclinux.org/

Clock: VCO: 398.131 MHz, Core: 398.131 MHz, System: 79.626 MHz

RAM:   128 MB

Flash:  4 MB

In:    serial

Out:   serial

Err:   serial

KGDB:  [on serial] ready

Net:   SMC91111-0

Hit any key to stop autoboot:  9 ^H^H^H 0

bfin> icache on

Instruction Cache is ON

bfin> dcache on

Data (writethrough) Cache is ON

bfin> tftp 0xffa0b000 add.bin

SMC91111: MAC ba:5f:37:c8:87:b3

Using SMC91111-0 device

TFTP from server 10.100.4.174; our IP address is 10.100.4.50

Filename 'add.bin'.

Load address: 0xffa0b000

Loading: *^H#

done

Bytes transferred = 28 (1c hex)

bfin> go 0xffa0b000

go 0xffa0b000

## Starting application at 0xFFA0B000 ...

 

 

Ack! Something bad happened to the Blackfin!

 

SEQUENCER STATUS:

SEQSTAT: 00002021  IPEND: 0032  SYSCFG: e0417544

  HWERRCAUSE: 0x0: undef

  EXCAUSE   : 0x21: undef inst

RETE: <0x(null)> /* Maybe null pointer? */

RETN: <0x07f5f21c> /* unknown address */

RETX: <0xffa0aea0> { __etext_l1 + 0xae74 }

RETS: <0x07fda426> { _do_go_exec + 0x26 }

RETI: <0x07fc00d6> { _start + 0xd6 }

DCPLB_FAULT_ADDR: <0x07f5f680> /* unknown address */

ICPLB_FAULT_ADDR: <0xffa0aea0> { __etext_l1 + 0xae74 }

 

PROCESSOR STATE:

R0 : 000000c2    R1 : 07f5001c    R2 : 07f5fe78    R3 : 07f500de

R4 : 0000000c    R5 : 07f5fe78    R6 : 00000001    R7 : 00000004

P0 : 01000090    P1 : 00000424    P2 : ffe01004    P3 : 07f5ff80

P4 : 07f5f681    P5 : ffa0b000    FP : 00000000    SP : ffb00f18

LB0: 07fded44    LT0: 07fdecfc    LC0: 00000005

LB1: 07fc66e2    LT1: 07fc66e0    LC1: 00000000

B0 : 07feef1c    L0 : 00000000    M0 : 00000000    I0 : 07fdf870

B1 : 00000000    L1 : 00000000    M1 : 00000000    I1 : 00000000

B2 : 00000000    L2 : 00000000    M2 : 00000000    I2 : 0000000f

B3 : 00000000    L3 : 00000000    M3 : 00000000    I3 : 0000001b

A0.w: 435be313   A0.x: 00000000   A1.w: 0000c7f7   A1.x: 00000000

USP : 0028defc  ASTAT: 02000020

 

Hardware Trace:

   0 Target : <0x07fc062c> { _trap_c + 0x0 }

     Source : <0x07fc088c> { _trap + 0x6c }

   1 Target : <0x07fc0820> { _trap + 0x0 }

     Source : <0xffa0b016> { __etext_l1 + 0xafea }

   2 Target : <0xffa0b000> { __etext_l1 + 0xafd4 }

     Source : <0x07fda424> { _do_go_exec + 0x24 }

   3 Target : <0x07fda420> { _do_go_exec + 0x20 }

     Source : <0x07fc784a> { _icache_disable + 0x1a }

   4 Target : <0x07fc7830> { _icache_disable + 0x0 }

     Source : <0x07fda41c> { _do_go_exec + 0x1c }

   5 Target : <0x07fda41c> { _do_go_exec + 0x1c }

     Source : <0x07fc789a> { _dcache_disable + 0x1a }

   6 Target : <0x07fc7880> { _dcache_disable + 0x0 }

     Source : <0x07fda418> { _do_go_exec + 0x18 }

   7 Target : <0x07fda416> { _do_go_exec + 0x16 }

     Source : <0x07fc785c> { _icache_status + 0x10 }

   8 Target : <0x07fc784c> { _icache_status + 0x0 }

     Source : <0x07fda412> { _do_go_exec + 0x12 }

   9 Target : <0x07fda410> { _do_go_exec + 0x10 }

     Source : <0x07fc78ac> { _dcache_status + 0x10 }

  10 Target : <0x07fc789c> { _dcache_status + 0x0 }

     Source : <0x07fda40c> { _do_go_exec + 0xc }

  11 Target : <0x07fda400> { _do_go_exec + 0x0 }

     Source : <0x07fcd280> { _do_go + 0x44 }

  12 Target : <0x07fcd26e> { _do_go + 0x32 }

     Source : <0x07fd309e> { _printf + 0x36 }

  13 Target : <0x07fd3094> { _printf + 0x2c }

     Source : <0x07fc0b8a> { _serial_puts + 0x1a }

  14 Target : <0x07fc0b7e> { _serial_puts + 0xe }

     Source : <0x07fc0b22> { _serial_putc + 0x46 }

  15 Target : <0x07fc0afc> { _serial_putc + 0x20 }

     Source : <0x07fc0b04> { _serial_putc + 0x28 }

 

kgdb: handle_exception; trap [0x4]

$T0435:a0aea0ff;0e:48f1f507;#58sending md.b 0x01000090

$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58$T0435:a0aea0ff;0e:48f1f507;#58

--

 

--- Vivi Li                                                  2010-05-18 04:41:38

The last time I saw this bug in regression is in rev 2010.03-svn2258.

And it disappeared since 2010.03-svn2263.

 

--- Mike Frysinger                                           2010-05-18 12:15:24

i dont think this is a regression.  i suspect the issue has always been there

and simply isnt always reproducible.  might rely on some cache state or other

system state.

 

--- Mike Frysinger                                           2010-06-04 01:15:04

can you update the test to do a md.b like mine after the tftp step ?  that way

we can see what the contents are when a failure occurs.

 

--- Vivi Li                                                  2010-06-10 03:06:30

OK, I add a md.b in DMA test.

 

--- Vivi Li                                                  2010-06-17 03:07:31

On bf537-stamp/bf533-stamp, u-boot may hang at md.b in DMA test when system

clock is low. Other platforms seem OK.

 

Bellow is the log on bf537-stamp:

--

U-Boot 2010.03-svn2330 (ADI-2010R1-pre) (Jun 17 2010 - 04:40:20)

 

CPU:   ADSP bf537-0.2 (Detected Rev: 0.2) (bypass boot)

Board: ADI BF537 stamp board

       Support: http://blackfin.uclinux.org/

Clock: VCO: 500 MHz, Core: 500 MHz, System: 50 MHz

RAM:   64 MB

Flash:  4 MB

In:    serial

Out:   serial

Err:   serial

KGDB:  [on serial] ready

Net:   bfin_mac

Hit any key to stop autoboot:  0

bfin> icache on

Instruction Cache is ON

bfin> dcache off

Data (writethrough) Cache is OFF

bfin> tftp 0xffa0b000 add.bin

Using bfin_mac device

TFTP from server 10.100.4.174; our IP address is 10.100.4.50

Filename 'add.bin'.

Load address: 0xffa0b000

Loading: #

done

Bytes transferred = 28 (1c hex)

bfin> md.b 0xffa0b000 $(filesize)

(It hangs here)

--

 

Bellow is the log on bf533-stamp:

--

U-Boot 2010.03-svn2330 (ADI-2010R1-pre) (Jun 17 2010 - 09:12:13)

 

CPU:   ADSP bf533-0.3 (Detected Rev: 0.3) (bypass boot)

Board: ADI BF533 Stamp board

       Support: http://blackfin.uclinux.org/

Clock: VCO: 497.664 MHz, Core: 497.664 MHz, System: 33.178 MHz

RAM:   128 MB

Flash:  4 MB

In:    serial

Out:   serial

Err:   serial

KGDB:  [on serial] ready

Net:   SMC91111-0

Hit any key to stop autoboot:  0

bfin> tftp 0xffa0b000 add.bin

SMC91111: MAC ba:5f:37:c8:87:b3

Using SMC91111-0 device

TFTP from server 10.100.4.174; our IP address is 10.100.4.50

Filename 'add.bin'.

Load address: 0xffa0b000

Loading: #

done

Bytes transferred = 28 (1c hex)

bfin> md.b 0xffa0b000 0x1C

(It hangs here)

--

 

--- Mike Frysinger                                           2010-06-21 17:25:34

what defines exactly did you change in your board to reprogram things ?

 

you could add a call to `reginfo` to all your board tests to simplify this as

it'll summarize the active PLL/SDC/AMC/etc... settings.

 

--- Vivi Li                                                  2010-06-22 02:39:52

I changed CONFIG_SCLK_DIV to 10 on bf537-stamp and to 15 on bf533-stamp.

 

--

Index: include/configs/bf537-stamp.h

===================================================================

--- include/configs/bf537-stamp.h       (revision 2333)

+++ include/configs/bf537-stamp.h       (working copy)

@@ -36,7 +36,7 @@

#define CONFIG_CCLK_DIV                        1

/* SCLK_DIV controls the system clock divider                          */

/* Values can range from 1-15                                          */

-#define CONFIG_SCLK_DIV                        4

+#define CONFIG_SCLK_DIV                        10

 

 

/*

--

 

--

Index: include/configs/bf533-stamp.h

===================================================================

--- include/configs/bf533-stamp.h       (revision 2333)

+++ include/configs/bf533-stamp.h       (working copy)

@@ -36,7 +36,7 @@

#define CONFIG_CCLK_DIV                        1

/* SCLK_DIV controls the system clock divider                          */

/* Values can range from 1-15                                          */

-#define CONFIG_SCLK_DIV                        6 /* note: 1.2 boards can go

faster */

+#define CONFIG_SCLK_DIV                        15 /* note: 1.2 boards can go

faster */

 

 

/*

--

 

--- Vivi Li                                                  2010-06-22 02:58:01

For bf537-stamp:

--

U-Boot 2010.03-svn2330 (ADI-2010R1-pre) (Jun 22 2010 - 01:47:58)

 

CPU:   ADSP bf537-0.2 (Detected Rev: 0.2) (bypass boot)

Board: ADI BF537 stamp board

       Support: http://blackfin.uclinux.org/

Clock: VCO: 500 MHz, Core: 500 MHz, System: 50 MHz

RAM:   64 MB

Flash:  4 MB

In:    serial

Out:   serial

Err:   serial

KGDB:  [on serial] ready

Net:   bfin_mac

Hit any key to stop autoboot:  0

bfin>

bfin> tftp 0xffa0b000 add.bin

Using bfin_mac device

TFTP from server 10.100.4.174; our IP address is 10.100.4.50

Filename 'add.bin'.

Load address: 0xffa0b000

Loading: #

done

Bytes transferred = 28 (1c hex)

bfin> reginfo

 

System Configuration registers

 

PLL Registers

        PLL_DIV:   0x000a   PLL_CTL:      0xa800

        PLL_STAT:  0x00a2   PLL_LOCKCNT:  0x0300

        VR_CTL:    0x40fb

 

EBIU AMC Registers

        EBIU_AMGCTL:   0x00ff

        EBIU_AMBCTL0:  0x7bb07bb0   EBIU_AMBCTL1:  0xffc27bb0

 

EBIU SDC Registers

        EBIU_SDRRC:   0x0306   EBIU_SDBCTL:  0x0025

        EBIU_SDSTAT:  0x0000   EBIU_SDGCTL:  0x8011114d

bfin> md.b 0xffa0b000 $(filesize)

--

 

--- Vivi Li                                                  2010-09-15 03:09:42

This bug exists on both bf533-stamp/bf537-stamp.

 

For bf537-stamp(CCLK 500MHz, SCLK 50MHz), icache on with dcache on or off, this

case will hang at md.b.

 

For bf533-stamp(CCLK 497MHz, SCLK 33MHz), icache on with dcache on or off, this

case will hang at md.b.

 

--- Mike Frysinger                                           2011-05-30 03:49:22

i'm pretty sure that only changing the SCLK divider will result in unstable runs

and any test results from it arent useful.  the SDRAM timings do not

automatically get recalculated based on the SCLK (see task [#4519]) which means

external memory probably randomly degrades over time.

 

this appears to be what you're testing, so i'm not sure the crashing results

are useful in anyway.

 

--- Mingquan Pan                                             2011-10-26 23:59:22

DMA case still fails at  Core normal and system low freq on both bf533 and bf537

board.

 

STEP 41: DMA test

 

tftp 0xffa03000 add.bin^M

SMC91111: MAC 00:e0:22:fe:b1:2d^M

Using SMC91111-0 device^M

TFTP from server 10.100.4.174; our IP address is 10.100.4.50^M

Filename 'add.bin'.^M

Load address: 0xffa03000^M

Loading: *^H#^M

done^M

Bytes transferred = 28 (1c hex)^M

bfin> md.b 0xffa03000 $(filesize)^M

ERROR: md.b fail

go 0xffa03000

ERROR: Run add.bin timeout

sending md.b 0x01000090

ERROR: Uboot locked up during tftp

ERROR: Uboot locked up during tftp

 

===== Recording result: DMA is fail

Fail to find last passed DMA result!

 

ERROR: u-boot failed to reset

 

*****************************

STEP 42: do tftp 20 times

 

waiting for uboot prompt

Attempting to recover to u-boot prompt

Starting reset_board_test.exp

Password: ^M

uboot32-533ezkit:/home/test/work/cruise/test_scripts/u-boot # su success

./reset_board 2^M

powering OFF board attached to printer port pin 2^M

powering ON board attached to printer port pin 2^M

uboot32-533ezkit:/home/test/work/cruise/test_scripts/u-boot # Ending

reset_board_test.exp

^M

^M

U-Boot 2011.09-svn2727 (ADI-2011R1-pre) (Oct 26 2011 - 18:25:54)^M

^M

CPU:   ADSP bf533-0.3 (Detected Rev: 0.5) (bypass boot)^M

Board: ADI BF533 EZ-Kit Lite board^M

       Support: http://blackfin.uclinux.org/^M

Clock: VCO: 594 MHz, Core: 594 MHz, System: 49.500 MHz^M

RAM:   32 MiB^M

Flash: 2.1 MiB^M

In:    serial^M

Out:   serial^M

Err:   serial^M

...*****************************

STEP 42: DMA test

 

tftp 0xffa0b000 add.bin^M

Using bfin_mac device^M

TFTP from server 10.100.4.174; our IP address is 10.100.4.50^M

Filename 'add.bin'.^M

Load address: 0xffa0b000^M

Loading: *^H#^M

done^M

Bytes transferred = 28 (1c hex)^M

bfin> md.b 0xffa0b000 $(filesize)^M

ERROR: md.b fail

go 0xffa0b000

ERROR: Run add.bin timeout

sending md.b 0x01000090

ERROR: Uboot locked up during tftp

ERROR: Uboot locked up during tftp

 

===== Recording result: DMA is fail

Fail to find last passed DMA result!

 

ERROR: u-boot failed to reset

waiting for uboot prompt

Attempting to recover to u-boot prompt

Starting reset_board_test.exp

Password: ^M

uboot34-bf537stamp:/home/test/work/cruise/test_scripts/u-boot # su success

./reset_board 2^M

powering OFF board attached to printer port pin 2^M

powering ON board attached to printer port pin 2^M

uboot34-bf537stamp:/home/test/work/cruise/test_scripts/u-boot # Ending

reset_board_test.exp

þ^M

^M

U-Boot 2011.09-svn2727 (ADI-2011R1-pre) (Oct 26 2011 - 16:25:35)^M

^M

CPU:   ADSP bf537-0.2 (Detected Rev: 0.2) (bypass boot)^M

Board: ADI BF537 stamp board^M

       Support: http://blackfin.uclinux.org/^M

Clock: VCO: 500 MHz, Core: 500 MHz, System: 50 MHz^M

RAM:   64 MiB^M

 

 

--- Mingquan Pan                                             2011-11-21 03:09:26

It looks this bug occouring not only on low freq, it happens on bf533 stamp

Core: 497.664 MHz, System: 82.944 MHz with both caches on.

 

 

*****************************

STEP 42: DMA test

 

tftp 0xffa0b000 add.bin^M

SMC91111: MAC ba:5f:37:c8:87:b3^M

Using SMC91111-0 device^M

TFTP from server 10.100.4.174; our IP address is 10.100.4.50^M

Filename 'add.bin'.^M

Load address: 0xffa0b000^M

Loading: *^H#^M

done^M

Bytes transferred = 28 (1c hex)^M

bfin> md.b 0xffa0b000 $(filesize)^M

ERROR: md.b fail

go 0xffa0b000

ERROR: Run add.bin timeout

sending md.b 0x01000090

ERROR: Uboot locked up during tftp

ERROR: Uboot locked up during tftp

 

===== Recording result: DMA is fail

Fail to find last passed DMA result!

 

ERROR: u-boot failed to reset

 

*****************************

STEP 43: do tftp 20 times

 

waiting for uboot prompt

Attempting to recover to u-boot prompt

Starting reset_board_test.exp

Password: ^M

uboot33-533stamp:/home/test/work/cruise/test_scripts/u-boot # su success

./reset_board 2^M

powering OFF board attached to printer port pin 2^M

powering ON board attached to printer port pin 2^M

uboot33-533stamp:/home/test/work/cruise/test_scripts/u-boot # Ending

reset_board_test.exp

^M

^M

U-Boot 2011.09-dirty (ADI-2011R1) (Nov 18 2011 - 18:05:01)^M

^M

CPU:   ADSP bf533-0.3 (Detected Rev: 0.3) (bypass boot)^M

Board: ADI BF533 Stamp board^M

       Support: http://blackfin.uclinux.org/^M

Clock: VCO: 497.664 MHz, Core: 497.664 MHz, System: 82.944 MHz^M

RAM:   128 MiB^M

Flash: 4 MiB^M

In:    serial^M

Out:   serial^M

Err:   serial^M

KGDB:  [on serial] ready^M

Net:   SMC91111-0^M

Hit any key to stop autoboot:  9 ^H^H^H 0 ^M

bfin> Recovered to the u-boot prompt

recover got back to u-boot prompt

This is the 0 time of tftp downloading

 

 

 

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add.bin    application/octet-stream    28    Vivi Li

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