Hi all,
I have just ported U-boot to a new e500 based board that is similar to Freescale's P2020RDB. A primary difference is that my board lacks NAND flash.
U-boot works as expected when I configure it to use the "old, simple command line parser." Upon enabling the Hush shell, I receive a bad trap into 0xd00 at 0x1ff5e458.
I spent a short bit of time debugging this bad trap and found it's occurring in lib/hashtable.c inside himport_r(). The debug("")/printf() statement on line 742 executes alright [debug("INSERT: table %p, filled %d/%d rv %p ==> name="%s" value="%s"\n"<snip>]. The loop condition of the do-while beginning on line 674 is then re-evaluated. It is during this re-evaluation of the do-while loop's condition that the trap is thrown. I came to this conclusion by placing debugging printf's into himport_r() and watching execution on my bdi-3000. I never see execution jump back to the start of the do-while. The behavior is the same when adding sync statements at the top and bottom of the do-while.
Has anyone seen this or a similar behavior before? Does anyone have any debugging advice? I reiterate that U-boot is working fine on my new board when I do not enable the Hush shell.
Thank you, -Rick R.
Seen when booting with Hush shell enabled: INSERT: table 1ffbc91c, filled 1/521 rv 1fe30b3c ==> name="bootcmd" value="setenv bootargs root=/dev/nfs rw nfsroot=$serverip:$rootpath ip=$ipaddr:$serverip:$g atewayip:$netmask:$hostname:$netdev:off console=$consoledev,$baudrate $othbootargs;tftp $loadaddr $bootfile;tftp $fdtaddr $fdtfile;bootm $loadaddr - $fdtaddr" RICKDBG: Directly after previous printf()/debug() and directly before do-while condition re-evaluation Bad trap at PC: 1ff5e458, SR: 21200, vector=d00 NIP: 1FF5E458 XER: 20000000 LR: 1FF5E444 REGS: 1fe2dd58 TRAP: 0d00 DAR: 220980E0 MSR: 00021200 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00
GPR00: 1FF5E444 1FE2DE48 1FE2DF48 0000001D 00000001 1FE2DCF8 FFFFFFFF 00000000 GPR08: 1FF7444F 00000020 FFFFFFFF 000000F1 00000209 8C346C02 1FF743C4 1FF743BC GPR16: 1FF74454 1FF74414 1FF743D8 1FF74350 1FE2DE68 1FE2DE50 1FE3012C 1FE2E130 GPR24: 00000000 1FE2E130 1FFBC91C 1FE2E229 24666474 61646472 220A007C 61646473 Call backtrace: 1FF5E444 1FF5E4DC 1FF43CF8 1FF43DE8 1FF43C6C 1FF362D8 1FF31648 37133713 Exception in kernel pc 1ff5e458 signal 0 ### ERROR ### Please RESET the board ###