Hi Tom, On Tue, Oct 18, 2016 at 9:35 PM, Tom Rini <tr...@konsulko.com> wrote: > On Tue, Oct 18, 2016 at 09:19:59AM -0400, Tom Rini wrote: >> On Tue, Oct 18, 2016 at 10:36:41AM +0800, Bin Meng wrote: >> > Hi Tom, >> > >> > On Sat, Oct 15, 2016 at 7:32 AM, Tom Rini <tr...@konsulko.com> wrote: >> > > Hey guys, >> > > >> > > After making Stephen's scripts work with qemu today, I've started >> > > testing out what platforms I can test out via qemu. I've found two >> > > problems with qemu-x86. First, there's a real problem with the network. >> > > I run qemu with "-nographic -cpu qemu32 -netdev >> > > user,id=net0,tftp=/tftpboot -device e1000,netdev=net0" so that I can >> > > tftpboot things in and I'm getting crc32 mismatches. >> > > >> > >> > I just tried QEMU v2.6.1 with u-boot.rom built from the master head, >> > but did not see such issue. >> >> Ah, I think I see it now. We can't use 0x0 as where to load stuff to >> and the tests default to 0x0 if you don't provide an address rather than >> $loadaddr. I'll see about changing the tests. >> >> > > Second, the sleep command is not at all accurate. It's returning the 3 >> > > second test in less than 1 second. >> > >> > Typical emulation target issue :) Did you see similar issue on other >> > QEMU platform with U-Boot? >> >> So this one is interesting. I see the same failure for MIPS/PPC for the >> qemu targets we have as well. I don't see this under QEMU for the ARM >> targets that I'm emulating. I suspect there's some common problem on >> the U-Boot side as also don't see this on the VMs I have running under >> qemu nor when I boot the kernelci rootfs from U-Boot. > > Bah, lemme correct myself. MIPS* and PowerPC fail due to sleep taking > slightly too long. x86 is the only one where it's just way too fast. > But this is not true once Linux itself is up. >
U-Boot uses x86 TSC timer as the delay timer. Right now the timer frequency is hard-coded in device tree. Auto-calibration does not work on QEMU. I need have another check to see if we can do auto-calibration. Regards, Bin _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
