microwatt

Author	SHA1	Message	Date
Benjamin Herrenschmidt	bd42580a42	pp_fifo: Fix full fifo losing all data on simultaneous push & pop The pp_fifo decides whether top = bottom means empty or full based on whether the previous operation was a push or a pop. If the fifo performs both in one cycle, it sets the previous op to pop. That means that a full fifo being added a character and removed one at the same time becomes empty. Instead, just leave the previous op alone. If the fifo was empty, it remains so, if it was full ditto. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>	5 years ago
Anton Blanchard	7aaed5abd5	fifo: Reformat Signed-off-by: Anton Blanchard <anton@linux.ibm.com>	5 years ago
Anton Blanchard	ad6c6790f9	fifo: Remove shared variable The shared variable used for FIFO memory is not VHDL 2008 compliant. I can't see why it needs to be a shared variable since reads and writes update top and bottom synchronously, meaning they don't need same cycle access to the FIFO memory. Signed-off-by: Anton Blanchard <anton@linux.ibm.com>	5 years ago
Anton Blanchard	5a29cb4699	Initial import of microwatt Signed-off-by: Anton Blanchard <anton@linux.ibm.com>	5 years ago