5 Commits (097d19fd32a434b290e2375e6ebd6dc88a791551)

Author	SHA1	Message	Date
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	573b6b4bc4	soc: Rework interconnect ... This changes the SoC interconnect such that the main 64-bit wishbone out of the processor is first split between only 3 slaves (BRAM, DRAM and a general "IO" bus) instead of all the slaves in the SoC. The IO bus leg is then latched and down-converted to 32 bits data width, before going through a second address decoder for the various IO devices. This significantly reduces routing and timing pressure on the main bus, allowing to get rid of frequent timing violations when synthetizing on small'ish FPGAs such as the Artix-7 35T found on the original Arty board. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>	5 years ago
Benjamin Herrenschmidt	8d64090a68	sw: Add full memory map to .h and use it for litedram .lds ... Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>	5 years ago
Benjamin Herrenschmidt	c19b5b8cc7	litedram: Update to new LiteX/LiteDRAM version ... Things have changed a bit in upstream LiteX. LiteDRAM now exposes a wishbone for the CSRs for example. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>	5 years ago
Benjamin Herrenschmidt	33de131384	Add microwatt_soc.h and io.h include file ... This contains C definitions for various Microwatt internal MMIOs and a set of accessors. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>	5 years ago