> On Sep 4, 2017, at 3:11 AM, Thomas Huth <h...@tuxfamily.org> wrote: > > On 01.09.2017 21:03, William Mahoney wrote: >> Hello QEMU users. >> >> I am interested in looking into a port for the Motorola Coldfire 5282. I saw >> that others in the Coldfire family were supported, like the 5208 eval board >> and the 5206 as a bare CPU. When I started looking into it I saw that >> several files (e.g. coldfire/flexcan.h and coldfire/intctrl.h) mention >> CONFIG_M5282 for conditional compilation. So I did: >> >> ./configure —prefix=(etc.etc.) —target-list=m68k-softmmu,m68k-linux-user >> —extra-cflags=‘-D CONFIG_M5282’ >> >> and a make, and it churned away for a while. It built ivshmem-client and >> server, qemu-ga, emu-img, qemu-io, qemu-nbd, and qemu-system-m68k. >> >> I expected to have it build emu-m68k but it did not, just the -system- >> version. > > It should be there - did you have a look at the m68k-linux-user directory?
This one’s "my bad". Fixed. > >> The qemu-system-m68k does not list the 5282 as a valid CPU, so obviously my >> define is not all that is required. >> >> So several questions. >> >> 1) Is there really 5282 support and if so… > > No, QEMU does not provide 5282 support. If you've spotted a CONFIG_M5282 > somewhere, that must have been in the sources of third party modules > like U-Boot which we include in the QEMU release tarballs. But that are > other projects, so you can not draw a conclusion from these submodules > on QEMU in general. Ah! I see, thanks. I will go back to the particular header files and see what they are related to. > >> 3) The documentation only talks about running a linux kernel but I want to >> run an image that already exists and is in the flash on the device. > > QEMU has the "-bios" parameter for loading firmware images. However, > this is currently not wired up in the both Coldfire boards that QEMU can > emulate (the Arnewsh 5206 and the MCF5206EVB). But it should be rather > easy to add that if necessary, I guess. > > You could also have a look at the "Generic Loader" device which can be > used to load blobs, too. Run > m68k-softmmu/qemu-system-m68k -device loader,? > to have a look at the required parameters of the device. > > Thomas Thanks Thomas. One more question. Somewhere there must be a "what parts to look for where” document. You know, a “If you are interested in the device support for CPU XYZ, you look in the …XYZ directory” etc. I’d like to find this and/or anything else to clue me in before starting as to the level of difficulty to add 5282. I mean, I have decades of “C” background, I know the 5282 well, but am I going to be 10 days or 10 weeks?
