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microwatt/fpga
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Benjamin Herrenschmidt bf1b98b958 litedram: Add support for booting without BRAM 
This adds an option to disable the main BRAM and instead copy a
payload stashed along with the init code in the secondary BRAM
into DRAM and boot from there

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
..
LICENSE Initial import of microwatt
arty_a7.xdc fpga: Hookup Arty to litedram
clk_gen_bypass.vhd Fix clk_gen_bypass
clk_gen_mcmm.vhd Improve PLL/MMCM clocks configuration
clk_gen_plle2.vhd Improve PLL/MMCM clocks configuration
cmod_a7-35.xdc Add SPI configuration to Xilinx constraint files
firmware.hex Add a few more FPGA related files
hello_world.hex hello_world: Use new headers and frequency from syscon
main_bram.vhdl Fix some ghdlsynth issues with fpga_bram
nexys-video.xdc fpga: Hookup nexys-video to litedram
nexys_a7.xdc Add SPI configuration to Xilinx constraint files
pp_fifo.vhd pp_fifo: Fix full fifo losing all data on simultaneous push & pop
pp_soc_uart.vhd pp_soc_uart: Fix rx synchronizers and ensure stable tx init state
pp_utilities.vhd Initial import of microwatt
soc_reset.vhdl soc_reset: Use counters, add synchronizers
soc_reset_tb.vhdl Exit cleanly from testbench on success
top-arty.vhdl litedram: Add support for booting without BRAM
top-generic.vhdl soc: Rework interconnect
top-nexys-video.vhdl litedram: Add support for booting without BRAM