From 7f307c54a932985b629482746f7127c77083e8d2 Mon Sep 17 00:00:00 2001 From: Sebastien Bourdeauducq Date: Wed, 29 Feb 2012 20:30:08 +0100 Subject: [PATCH] README: clarify license --- README | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/README b/README index 660e21799..9c8f17b42 100644 --- a/README +++ b/README @@ -26,12 +26,35 @@ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. +Additional permissions under section 7 of the GNU General Public License +(GPL) are hereby granted. The purpose of this exception is to allow +non-GPL (including proprietary) logic cores to be used in conjunction +with code generated by Migen in a design. + +"Generated" code refers to Verilog or VHDL code that has been obtained +by converting FHDL structures using Migen. + +To "instantiate" is to include and connect another module as specified +in section 12.1.2 of the IEEE standard 1364-2001 or in section 9.6 of +the IEEE standard 1076-1993. + +(1) You have permission to propagate a work of generated code that + instantiates modules that are not generated code and do not comply + with the GPL. +(2) You have permission to propagate a work of Verilog or VHDL code that + is not generated code, does not comply with the GPL and instantiates + generated code. + +The availability of this exception does not imply any general +presumption that third-party software is unaffected by the copyleft +requirements of the license of Migen. + Unless otherwise noted, Migen's source code is copyright (C) 2011-2012 Sebastien Bourdeauducq. Other authors retain ownership of their contributions. If a submission can reasonably be considered independently copyrightable, it's yours and I encourage you to claim it with appropriate copyright notices. This submission then falls under the "otherwise noted" category. All submissions must use a license -compatible with the GPL. +compatible with the GPL and the exception above. "Electricity! It's like magic!"