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caravel-mpw7-20221125
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litedram-update
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3 Commits (801bd3b8ee2807771f83bfe575946ef9f5769948)

Author SHA1 Message Date
Benjamin Herrenschmidt a93d9e77c9 litedram: Remove remnants of riscv-inits 
We still had some wires bringing an extra serial port out of
litedram for the built-in riscv processor. This is all gone now
so take them out.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
 5 years ago
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>
 5 years ago
Benjamin Herrenschmidt 6fe077910b litedram: Add simulation support 
This adds a simulated litedram model along with the necessary
Makefile gunk to verilate it and wrap it for use by ghdl.

The core_dram_tb test bench is a variant of core_tb with
LiteDRAM simulated. It's not built by default, an explicit

make core_dram_tb

is necessary as to not require verilator to be installed for
the normal build process (also it's slow'ish).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
 5 years ago