Are you setting the pioSize in the constructor of your dmac device to 0xfff?
Ali On May 19, 2011, at 8:05 PM, Digant wrote: > Hi all, > > I have been trying to develop a model for Pl081 DMA controller. > > I have inherited class from AmbaDmaDevice and as a first step I have given > register read/write features. > And added it in M5 system by editing RealView.py to membus. > I have couple of questions, > 1- It should be on membus right ? rather then on IO bus !! > 2- How can I reduce the bus width from 64 to 32 ? > 3- After configuration I am getting this : > from config.ini > . > . > . > [system.membus] > type=Bus > children=badaddr_responder > block_size=64 > bus_id=1 > clock=1000 > header_cycles=1 > use_default_range=false > width=64 > default=system.membus.badaddr_responder.pio > port=system.bridge.side_b system.physmem.port[0] system.physmem2.port[0] > system.diskmem.port[0] system.realview.gic.pio system.realview.l2x0_fake.pio > system.realview.dmac.pio system.cpu.itb.walker.port > system.cpu.dtb.walker.port system.cpu.icache_port system.cpu.dcache_port > system.realview.dmac.dma > > [system.membus.badaddr_responder] > type=IsaFake > pio_addr=0 > pio_latency=1000 > pio_size=8 > platform=system.realview > ret_bad_addr=true > ret_data16=65535 > ret_data32=4294967295 > ret_data64=18446744073709551615 > ret_data8=255 > system=system > update_data=false > warn_access=warn > pio=system.membus.default > > [system.realview.dmac] > type=Pl081 > amba_id=1314945 > gic=system.realview.gic > int_num=55 > max_backoff_delay=10000000 > min_backoff_delay=4000 > pio_addr=268632064 > pio_latency=10000 > platform=system.realview > system=system > dma=system.membus.port[11] > pio=system.membus.port[6] > > but when I run Linux kernel with NO DMA / PL081 drivers.(I have written my > own driver to read write dma registers for time being).I am > getting this,(here 0x10030fe0 is AMBA ID1 read only register) > from the M5-log: > . > . > . > warn: Device system.membus.badaddr_responder accessed by read to address > 0x10030fe0 size=4 > For more information see: http://www.m5sim.org/warn/f6456e4f > m5.debug: build/ARM_FS/cpu/simple/atomic.cc:347: Fault > AtomicSimpleCPU::readBytes(Addr, uint8_t*, unsigned int, unsigned int): > Assertion `!pkt.isError()' failed. > Program aborted at cycle 4790235000 > Aborted > > > _______________________________________________ > gem5-users mailing list > gem5-users@m5sim.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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