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4 Commits (cc20989bdab42702be37b547c74bfa55962df34d)

Author SHA1 Message Date
Benjamin Herrenschmidt c22734d0d9 wb_debug: Add wishbone pipelining support 
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Benjamin Herrenschmidt 1a63c39704 Make it possible to change wishbone address size 
All that needs to be changed now is the size in wishbone_types.vhdl
and the address decoder in soc.vhdl

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Paul Mackerras a27ed0ec27 wishbone_debug_master: Improve timing 
The current code has the possibility that we could set reg_addr
or reg_ctrl and then increment reg_addr in the same cycle, resulting
in some long timing paths.  Rearrange the code to make it clear
that we are not trying to add an auto-increment to data from
outside the module; in any given cycle we either set one of
reg_addr and reg_ctrl, or we possibly increment reg_addr.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Benjamin Herrenschmidt b46f81fae4 Wishbone debug module 
This adds a debug module off the DMI (debug) bus which can act as a
wishbone master to generate read and write cycles.

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