Peter, I ended up using the first technique for VersatilePB and works just fine.
Now I want to be able "power off" a qemu-system-i386 and I was wondering what you might suggest? I'm hoping there might be something "easy". -- Wink On Mon, Oct 19, 2015 at 1:49 PM Wink Saville <w...@saville.com> wrote: > THANKS, I'll give those things a try! > > On Mon, Oct 19, 2015, 1:46 PM Peter Maydell <peter.mayd...@linaro.org> > wrote: > >> On 19 October 2015 at 20:30, Wink Saville <w...@saville.com> wrote: >> > I would like to use qemu in a test environment where I give a "kernel" >> image >> > to qmeu have it execute it and then when complete have qemu exit. >> Currently >> > when >> > executing: >> > >> > $ qemu-system-arm -M versatilepb -m 128M -nographic -kernel test.bin >> > ... >> > Hi >> > $ >> > >> > After test.bin prints "Hi" via the "Uart in VersatilePB" I have to >> > interactively press ctrl-a then press 'x' to have it return to the >> command >> > prompt. Is there a way for test.bin to cause qemu to exit without >> having to >> > type commands in the terminal. >> >> That depends on the machine you're using (in this case versatilepb). >> Basically if the guest binary tells the emulated hardware "please >> power down" via whatever that hardware's mechanism is, then QEMU >> will exit. For versatilepb there isn't any way to do that, but you >> can use QEMU's "-no-reboot" option (which turns resets into power >> downs) and then tell the emulated hardware to do a reset. For info >> on how to do a reset on the versatilepb board see the h/w docs: >> http://infocenter.arm.com/help/topic/com.arm.doc.dui0224i/Caccifgi.html >> You need to write to SYS_LOCKCTL to unlock the register and then >> to SYS_RESETCTL to actually request the reset. >> >> Other options you can use: >> * an ARM-specific option is to use the -semihosting command line >> option, and then you can use the semihosting ABI to exit. >> You need to do an angel_SWIreason_ReportException: >> >> http://infocenter.arm.com/help/topic/com.arm.doc.dui0471l/pge1358787050566.html >> (which is to say, set r0 to 0x18, r1 to 0x20026 and do a >> swi 0x123456 in ARM mode or swi 0xab (Thumb mode) or >> bkpt 0xab (M profile). >> Semihosting also lets you conveniently output to the terminal, >> read files or look at the command line, so it's handy for >> writing test cases. >> >> * use the 'expect' utility to script up the "make QEMU exit >> when it's printed the result" handling. It's generally nicer >> to avoid this, but as a last resort it's nice to have: a >> handful of lines of expect scripting are sufficient to do >> basic "start this program, then exit when some string appears >> in its output" control. >> >> PS: you might prefer '-display none' over '-nographic'; >> that gives you the serial output to standard output, but >> doesn't do the 'monitor on alternate screen, ctrl-a <whatever>' >> behaviour. You can just ctrl-c to exit qemu then. >> Basically -nographic is a magic combination of a bunch >> of options and sometimes you only want one of them. >> >> thanks >> -- PMM >> >
