Hi Waldemar, On 03/02/17 06:15, Waldemar Brodkorb wrote: > your commit 80cca775cdc4f8555612d2943a2872076b33e0ff breaks Linux > booting in qemu-system-m68k: > > qemu-system-m68k -nographic -M mcf5208evb -cpu m5208 -kernel > qemu-m68k-mcf5208-initramfspiggyback-kernel [snip] > [ 3.460000] ColdFire internal UART serial driver > [ 3.470000] mcfuart.0: ttyS0 at MMIO 0xfc060000 (irq = 90, > base_baud = 2083333) is a ColdFire UART > [ 3.500000] console [ttyS0] enabled > [ 3.500000] mcfuart.0: ttyS1 at MMIO 0xfc064000 (irq = 91, > base_baud = 2083333) is a ColdFire UART > [ 3.510000] mcfuart.0: ttyS2 at MMIO 0xfc068000 (irq = 92, > base_baud = 2083333) is a ColdFire UART > qemu: hardware error: mcf_fec_read: Bad address 0x200 > > CPU #0: > D0 = 00000200 A0 = 4780fdec F0 = 0000000000000000 ( 0) > D1 = 4780ff94 A1 = 401703de F1 = 0000000000000000 ( 0) > D2 = 46dbb000 A2 = 4780f800 F2 = 0000000000000000 ( 0) > D3 = 4019d612 A3 = fc030200 F3 = 0000000000000000 ( 0) > D4 = 00000000 A4 = 4019d608 F4 = 0000000000000000 ( 0) > D5 = 40043f7a A5 = 400222a0 F5 = 0000000000000000 ( 0) > D6 = 400df204 A6 = 4783de78 F6 = 0000000000000000 ( 0) > D7 = 401701c0 A7 = 4783de28 F7 = 0000000000000000 ( 0) > PC = 400e5ff2 SR = 2009 -N--C FPRESULT = 0 > Aborted > wbx@vopenadk:~/m68k/openadk$ > wbx@vopenadk:~/m68k/openadk$ qemu-system-m68k --version > QEMU emulator version 2.8.0 > Copyright (c) 2003-2016 Fabrice Bellard and the QEMU Project > developers > > Any ideas how to fix it?
This is a limitation in the FEC support in QEMU. This works on real ColdFire hardware (which do support the FEC MIB stats registers from offset 0x200 - so not 5272). I sent this patch to the qemu dev list a couple of weeks back which fixes qemu: http://lists.gnu.org/archive/html/qemu-devel/2017-01/msg01781.html I do not believe it has been picked up by QEMU mainline yet (I will probably have to resend and push a little to get that done). Regards Greg
