I am running an N1 core based full system fastmodel simulation. I am facing few issues in reading CMN700 register from my baremetal arm64 program. I am documenting the questions here:
1. CMN700.lisa uses the mesh_config_file param to pass on the yml file for topology. Is there any param to pass the memory map which is available in xml format so that the fastmodel can understand the CMN700 registers map?
2. The ARM baremetal program is trying to read a CMN700 register. Unfortunately, I am facing following 2 issues:
24 clk cluster0.cpu0 MR4 00000004042d1d80:0004042d1d80 Device-nGnRnE (StronglyOrdered) 0000000324 clk cluster0.cpu0 R X6 000000000000000324 clk cluster0.cpu0 BR4D_PS O____S I____S 00 0004042d1d80 DECERR 24 clk cluster0.cpu0 cmn700.cmn600_cache.downstream.pvbusmaster R4D_PS O____S I____S 00 0004042d1d80 DECERR 24 clk cluster0.cpu0 SalinaSoC.dec_cmn700apb_buslog R4D_PS O____S I____S 00 0000042d1d80 SLVERR 24 clk cluster0.cpu0 SalinaSoC.ni700_dec_buslog R4D_PS O____S I____S 00 0004042d1d80 SLVERR
CMN700 is setup in my lisa file as follows:
cmn700: CMN700( cache_state_modelled = true, rnf_sci_enable = "0xffff", // Enable sci for cluster 0 to 7 use_yml_periphbase = true, enable_logger = true, //register_traces_for_ccg_apb_accesses = true, print_cmn_config = true, //yml_has_node_addresses = true, //rnf_index_to_nodeid = "0x0=0x80", mesh_config_file.default = "cmn700_nxc_topology.yml" );
Hi Klka,1. CMN700 model can only load a yml file generated by Arm Socrates (See the link below for more details). https://developer.arm.com/documentation/100964/1119/Fast-Models-components/SystemIP-components/CMN700Any other formats than this aren't supported by the model, and there is no direct way of setting system address map (SAM), so CMN700 initialization and discovery should be performed by firmware to configure SAM.2. I don't know which N1 system you are using but if it is the N1 edge reference design (*) or similar, they are designed to work with Arm Reference Design software stack so running baremetal application on it isn't appropriate in most cases.(*) Download page of N1 edge reference design: developer.arm.com/.../arm-ecosystem-fvpsFYI, sw stack for the N1 edge RD can be found in the link below.
BTW, if you license Fast Models products, you can receive technical support from Arm. You can send your query to email@example.com or open a case at https://developer.arm.com/support/ .Kind regards,Toshi
Thanks, Toshi. Let me follow up with "Support" system!