Hi there, thanks to some hardware upgrades to my Amiga A600 (A603 chip memory expansion to 2MB, Kickstart 3.1 rom, CF-IDE-Adapter with 4GB CF-card, PCMCIA network card and ACA630 CPU replacement board containig a 68030, but no FPU) i decided i could finally try to get Linux running on that machine. So i debootstrapped a basic system to my CF-card, compiled a standard amiga-kernel 3.1.4 (with CONFIG_M68KFPU_EMU_ONLY activated) and tried to start it. At first, the Amiga froze every time i started amiboot, so i tried supplying my cpu type by hand (with "-p 202") and it worked, but after loading the kernel the amiga fired off a "guru meditation" 00000004 (illegal instruction). After messing around with some kconfig-options and rebuilding the kernel several time without getting anywhere i looked at the build process for the NetBSD-kernel i successfully built for the Amiga before and noticed, that the NetBSD-guys are building their Amiga-kernel with -msoft-float. So after applying that to the Linux-kernel (patch attached) the kernel booted, but died directly after initializing the the framebuffer, just at activating the serial console, with a very long panic message. I couldn't get any output via the serial port (with console=ttyS0), so i made a video of the Amiga booting with my (very bad) handy camera. I'm sorry i can't give you a proper boot log becaus of that. If you would need one i could try to make a video of the boot process with the digital camera of my father and either upload that somewhere or write the messages in the video down. I could make out some of the first lines in the panic: Data Read fault at 0x00000020 in Super Data (pcb0xb7e08) BAD KERNEL BUSERR Oops: 00000000 PC: (...) internal_create_group+... The first command in the trace was a call to mm_release, so i figured the fpu emulator was crashing something inside the sysfs-part of the kernel. So i tried recompiling the kernel with CONFIG_EXPERT activated and CONFIG_SYSFS deactivated and it works! After uninstalling udev from the debian system and mknod'ing all needed device-files everything seems to be running fine, with the exception of the RTC (i think that's my fault, something i missed while configuring my kernel, is there something needed besides of genrtc to get the A600/A603-clock working?) and the PCMCIA network card (some card with NE2000-chip, it works flawlessly under AmigaOS with cnet.device and NetBSD, when inserting the apne module i get "ethernet PCMCIA card inserted", followed by "device not found". Maybe i'm missing a device file here?). So, i wanted to thank all of you linux-m68k-staff here for making it possible to get my favorite OS running on my favorite little computer pal :-) If you are interested, i could give you further information (my kernel-config, for example) or get you updated, if i get the last missing parts to run. And, like i said before, if you are interested i could try to get that kernel panic in a readable form, so you could try to analyze the error. Thanks again, and bye! Regards, Patrick
--- linux-source-3.1.orig/arch/m68k/Makefile_mm 2011-11-28 23:48:14.000000000 +0100 +++ linux-source-3.1/arch/m68k/Makefile_mm 2012-01-14 17:34:55.000000000 +0100 @@ -33,6 +33,10 @@ # without -fno-strength-reduce the 53c7xx.c driver fails ;-( KBUILD_CFLAGS += -pipe -fno-strength-reduce -ffixed-a2 +ifdef CONFIG_M68KFPU_EMU_ONLY +KBUILD_CFLAGS += -msoft-float +endif + # enable processor switch if compiled only for a single cpu ifndef CONFIG_M68020 ifndef CONFIG_M68030
