3 Commits (0809bc898b0dacd1923d513331ac3008947bee31)

Author	SHA1	Message	Date
Benjamin Herrenschmidt	f86fb74bfe	irq: Simplify xics->core irq input ... Use a simple wire. common.vhdl types are better kept for things local to the core. We can add more wires later if we need to for HV irqs etc... 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
Michael Neuling	b4f20c20b9	XICS interrupt controller ... New unified ICP and ICS XICS compliant interrupt controller. Configurable number of hardware sources. Fixed hardware source number based on hardware line taken. All hardware interrupts are a fixed priority. Level interrupts supported only. Hardwired to 0xc0004000 in SOC (UART is kept at 0xc0002000). Signed-off-by: Michael Neuling <mikey@neuling.org>	5 years ago