3 Commits (a3857aac940437c18a46d518929ea7e78ac7e61e)

Author	SHA1	Message	Date
Benjamin Herrenschmidt	a3857aac94	litedram: Add an L2 cache with store queue ... This adds a cache between the wishbone and litedram with the following features (at this point, it's still evolving) - 128 bytes line width in order to have a reasonable amount of litedram pipelining on the 128-bit wide data port. - Configurable geometry otherwise - Stores are acked immediately on wishbone whether hit or miss (minus a 2 cycles delay if there's a previous load response in the way) and sent to LiteDRAM via 8 entries (configurable) store queue 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