On 12/03/2015 01:49 AM, Wang Huan-B18965 wrote:
<snip>
The actual command which results in a watchdog reset is 'sf read 0x81040000 0x200000 0x400000'. Please note that this uses an external watchdog which is enabled by default and resets after ~1.5s. The command itself takes about 2s (taken from my watch).
[Alison Wang] I could not reproduce the issue. Maybe I don't have the external watchdog which will reset after ~1.5s as Alexander mentioned.
U-Boot 2015.10-00273-g7ee52af (Dec 03 2015 - 17:32:24 +0800)
CPU: Freescale LayerScape LS1021E, Version: 2.0, (0x87081120) Clock Configuration: CPU0(ARMV7):1000 MHz, Bus:300 MHz, DDR:800 MHz (1600 MT/s data rate), Reset Configuration Word (RCW): 00000000: 0608000a 00000000 00000000 00000000 00000010: 30000000 00007900 40025a00 21046000 00000020: 00000000 00000000 00000000 20000000 00000030: 20024800 881b7540 00000000 00000000 Model: LS1021A TWR Board Board: LS1021ATWR I2C: ready DRAM: 1 GiB Using SERDES1 Protocol: 48 (0x30) MMC: FSL_SDHC: 0 SF: Detected N25Q128 with page size 256 Bytes, erase size 64 KiB, total 16 MiB EEPROM: NXID v1 PCIe1: Root Complex no link, regs @ 0x3400000 PCIe2: disabled In: serial Out: serial Err: serial SEC: RNG instantiated SATA link 0 timeout. AHCI 0001.0300 1 slots 1 ports ? Gbps 0x1 impl SATA mode flags: 64bit ncq pm clo only pmp fbss pio slum part ccc Found 0 device(s). SCSI: Net: eTSEC1 is in sgmii mode. eTSEC2 is in sgmii mode. eTSEC1, eTSEC2, eTSEC3 [PRIME] => => sf probe SF: Detected N25Q128 with page size 256 Bytes, erase size 64 KiB, total 16 MiB => sf read 0x81040000 0x200000 0x400000 device 0 offset 0x200000, size 0x400000 SF: 4194304 bytes @ 0x200000 Read: OK =>
Alison and Alexander,
My concerns are
Is the watchdog triggered reasonably?
[Alison Wang] I think as Alexander set the watchdog to 1s timeout, so the trigger occurs at that time.
How long does it take to load the file?
[Alison Wang] About 2s.
Is SPI running at reasonable speed?
[Alison Wang] Yes.
Is there other similar situations such as loading large file off NOR flash?
[Alison Wang] If we don't set the watchdog to 1s timeout, both loading Large file to serial flash or NOR flash, there is not such situation. If we set the watchdog to 1s timeout, I think there are both such situation.
Alexander, do you agree with my answer? Please give your comments too. :)
Best Regards, Alison Wang