I thought I would look at the -bios first and I had some time this afternoon. If you’re the right age group you will understand when I say "YOU ARE IN A MAZE OF TWISTY LITTLE PASSAGES, ALL ALIKE”.
"digic_load_rom()" knows the filename via an extern “bios_name” which is at “include/sysemu/sysemu.h” but really lives in “vl.c”. It is set based on “machine_ops” that comes from “qemu_get_machine_opts()” which in turn comes from “emu_find_opts_singleton()” which is in "util/qemu-config.c”… Shortcut time. Presumably there is a way to specify some command line switch, described as “-bios”, and have the filename end up at “digit_load_rom()”. But I don’t see the direct path, or a header with all the options listed for the specific machine, or… Can you walk me through how a “-bios” command line switch is actually supposed to appear (it doesn’t on qemu-system-arm)? Or should I be installing Oxygen? :-) On Sep 6, 2017, at 12:56 AM, Thomas Huth <h...@tuxfamily.org<mailto:h...@tuxfamily.org>> wrote: On 06.09.2017 00:04, William Mahoney wrote: On Sep 5, 2017, at 4:37 PM, Peter Maydell <peter.mayd...@linaro.org<mailto:peter.mayd...@linaro.org>> wrote: On 5 September 2017 at 20:30, William Mahoney <wmaho...@unomaha.edu<mailto:wmaho...@unomaha.edu>> wrote: [...] 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? This depends a lot on how different the 5282 is from what we currently support (5206 and 5208, from the looks of things). It’s like a 5208 but with additional on-chip I/O. Some of it is simple, like the UARTs are identical I think. Some parts are new, on-chip FLASH and SRAM, CAN bus, ... That's good, so you might be able to simply start with the 5208 core. I suggest that you start with making a copy of hw/m68k/mcf5208.c and then see what you need to modify there. To support the "-bios" parameter of QEMU, do a "grep -r bios_name hw/" to see how it is handled in the other boards (e.g. something like the digic_load_rom() function in hw/arm/digic_boards.c). Thomas
