[#3832] kernel build with Debug option enabled fails to boot up

Submitted By: Mingquan Pan

Open Date

2008-01-16 00:41:52 Close Date

2008-01-21 20:10:07

Priority:

Medium Assignee:

Michael Hennerich

Status:

Closed Fixed In Release:

N/A

Found In Release:

N/A Release:

Category:

N/A Board:

STAMP

Processor:

BF537 Silicon Revision:

Is this bug repeatable?:

Yes Resolution:

Fixed

Uboot version or rev.:

Toolchain version or rev.:

Oct_07

App binary format:

N/A

Summary: kernel build with Debug option enabled fails to boot up

Details:

kernel build with Debug option enabled fails to boot up since Michael's gpio patch r4088.

U-Boot 1.1.6-svn997 (ADI-2007R2-pre) (Nov 1 2007 - 14:45:30)^M

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

Board: ADI BF537 stamp board^M

Support: blackfin.uclinux.org/^M

Clock: VCO: 500 MHz, Core: 500 MHz, System: 100 MHz^M

SDRAM: 64 MB^M

FLASH: 4 MB^M

In: serial^M

Out: serial^M

Err: serial^M

Net: Blackfin EMAC^M

I2C: ready^M

Hit any key to stop autoboot: 2 ^H^H^H 0 ^M

bfin> set bootargs root=/dev/mtdblock0 rw earlyprintk=serial,uart0,57600^M

bfin> set serverip 10.100.4.174^M

bfin> set ipaddr 10.100.4.50^M

bfin> save^M

Saving Environment to Flash...^M

. done^M

Un-Protected 1 sectors^M

Erasing Flash...^M

. done^M

Erased 1 sectors^M

Writing to Flash... done^M

. done^M

Protected 1 sectors^M

bfin> tftpboot 0x2000000 linux^M

Using Blackfin EMAC device^M

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

Filename 'linux'.^M

Load address: 0x2000000^M

Loading: *^H#################################################################^M

#################################################################^M

##############################################################

...

#################################################################^M

#######################^M

done^M

Bytes transferred = 22745618 (15b1212 hex)^M

Image size is 15b1212

bfin> bootelf^M

Loading .text @ 0x00001000 (1030848 bytes)^M

Loading .rodata @ 0x000fd000 (230040 bytes)^M

Loading __ksymtab @ 0x00135298 (14400 bytes)^M

Loading __ksymtab_gpl @ 0x00138ad8 (4016 bytes)^M

Loading __ksymtab_strings @ 0x00139a88 (44100 bytes)^M

Loading __param @ 0x001446cc (260 bytes)^M

Loading .data @ 0x00145000 (69632 bytes)^M

Loading .init.text @ 0x00156000 (94692 bytes)^M

Loading .init.data @ 0x0016d1e4 (3164 bytes)^M

Loading .init.setup @ 0x0016de40 (612 bytes)^M

Loading .initcall.init @ 0x0016e0a4 (436 bytes)^M

Loading .con_initcall.init @ 0x0016e258 (4 bytes)^M

Loading .init.ramfs @ 0x0016e25c (3180969 bytes)^M

Loading .text_l1 @ 0xffa00000 (8368 bytes)^M

sh_addr: FFA00000, p_paddr: 00476C05^M

Loading from: 02477000 to 00476C05, size: 8368^M

Loading .data_l1 @ 0xff800000 (192 bytes)^M

sh_addr: FF800000, p_paddr: 00478CB5^M

Loading from: 0247A000 to 00478CB5, size: 192^M

Clearing .bss @ 0x00479000 (66912 bytes)^M

## Starting application at 0x00156000 ...^M

Failed to reboot the linux kernel

Follow-ups

--- Sonic Zhang 2008-01-18 01:27:30

kernel of r4087 works with Debug option enabled.

--- Sonic Zhang 2008-01-18 01:29:19

Only replicate on bf537-stamp.

--- Sonic Zhang 2008-01-18 03:28:16

To be more specific, after selecting following options, kernel fails to boot.

Kernel hacking --->

[*] Kernel debugging

[*] Compile the kernel with frame pointers.

--- Michael Hennerich 2008-01-18 03:36:33

I will have a look - now.

-Michael

--- Michael Hennerich 2008-01-18 05:19:49

The problem seems to happen due to stack corruption in functions called by

_bf53x_cache_init.

In bf53x_cache_init after UNLINK, RTS we jump into the nirvana.

I suspect bfin_icache_init() or bfin_dcache_init() is causing the problem.

Further down I think we imported a bug during the recent no-mpu, mpu

restructuring.

I’ll dig further.

-Michael

--- Michael Hennerich 2008-01-18 08:28:33

Fixed -

trunk/arch/blackfin/kernel/cplb-nompu/cacheinit.c (4115 => 4116)

writes to I/DMEM_CONTROL must be followed by SSYNC.

-Michael

--- Mingquan Pan 2008-01-21 22:12:38

Yes,close.

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