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| -rw-r--r-- | doc/README.socfpga | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/doc/README.socfpga b/doc/README.socfpga index 6d882b70c1..5bf23fe205 100644 --- a/doc/README.socfpga +++ b/doc/README.socfpga @@ -314,3 +314,26 @@ Table of Contents socfpga_agilex_atf_defconfig -> socfpga_agilex_defconfig socfpga_n5x_atf_defconfig -> socfpga_n5x_defconfig socfpga_stratix10_atf_defconfig -> socfpga_stratix10_defconfig + +10. FPGA full reconfig flow for SoC64 devices +--------------------------------------------------------------------- + Bridges should be disabled before running any FPGA reconfiguration, + this ensures that all outstanding traffic between MPFE to bridge and + FPGA to bridge are completed. + + Bridges should be enabled after FPGA is successfully programmed + and entered user mode. + + Legacy and official boot flow: + If you are running fpga load command in U-Boot console, you are required + to run below steps to gracefully shutdown the bridges before running FPGA + reconfiguration: + 1. bridge disable command + 2. fpga load command + 3. bridge enable command after FPGA is successfully programmed + + If you are running bootm to program FPGA with bitstream loading from + FIT, you are required to run below steps before running bootm command. + 1. bridge disable command (can be done in U-Boot script) + 2. bootm, the bridge would be enabled automaticaly once FPGA is + is successfully programmed. |