HPS Address Space and HPS2FPGA axi bridge

dear badOman

I have cyclone V custom board with 2G sdram configured with Qsys.

my problem is when i try to write with memtool to address from 0x80000000 to 0xc0000000 i get error massage

root@socfpga_cyclone5:~# echo 1 > /sys/class/fpga-bridge/lwhps2fpga/enable

root@socfpga_cyclone5:~# echo 1 > /sys/class/fpga-bridge/hps2fpga/enable

root@socfpga_cyclone5:~# echo 1 > /sys/class/fpga-bridge/fpga2hps/enable

root@socfpga_cyclone5:~# memtool -32 0x80000000=0x00200100

Writing 32-bit value 0x200100 to address 0x80000000

[ 6879.506640] Unhandled fault: external abort on non-linefetch (0x1818) at 0x76fe9000

Bus error

root@socfpga_cyclone5:~#

i do open the bgidges but it looks like the kernel cant see the memory region 0x80000000 to 0xc0000000

i know it is related to the preloader - when i use quartus 13.1 it is o.k and when i use quartus 14.1 or 15.0 i get the error massage

as mentioned on# 3 before can you give some more dtails how to configure the hps to be exposed to 3GB sdram

thanks

yehuda otzri