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Explicit packing of Command/Status #57

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Explicit packing of Command/Status #57

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2c7d96c
Added conversions for command and status to/from ap_uint
quetric Dec 14, 2021
2b383cc
Fixed casting for Command, added indeterminate BTT fields for Status
quetric Dec 15, 2021
2f22018
Fixed bit assignment for slave error in Status
quetric Dec 15, 2021
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30 changes: 30 additions & 0 deletions include/hlslib/xilinx/Axi.h
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,20 @@ struct Command {
Command(decltype(address) const &_address, decltype(length) const &_length)
: length(_length), address(_address) {}
Command() : length(0), address(0) {}
Command(ap_uint<addressWidth+bttWidth+17> const &cmd)
: length(cmd(22,0)), type(cmd(23,23)), dsa(cmd(29,24)), eof(cmd(30,30)), drr(cmd(31,31)), address(cmd(95,32)), tag(cmd(99,96)) {}
operator ap_uint<addressWidth+bttWidth+17>(){
ap_uint<addressWidth+bttWidth+17> ret;
ret(bttWidth-1,0) = length;
ret(bttWidth,bttWidth) = type;
ret(bttWidth+6,bttWidth+1) = dsa;
ret(bttWidth+7,bttWidth+7) = eof;
ret(bttWidth+8,bttWidth+8) = drr;
ret(addressWidth+bttWidth+8,bttWidth+9) = address;
ret(addressWidth+bttWidth+12,addressWidth+bttWidth+9) = tag;
ret(addressWidth+bttWidth+16,addressWidth+bttWidth+13) = 0;
return ret;
}
};

/// Implements the status bus interface for the DataMover IP
Expand All @@ -54,9 +68,25 @@ struct Status { // 8 bits
ap_uint<1> decodeError{0};
ap_uint<1> slaveError{0};
ap_uint<1> okay;
ap_uint<23> bytesReceived{0};
ap_uint<1> endOfPacket{0};

Status(bool _okay) : okay(_okay) {}
Status() : okay(true) {}
Status(ap_uint<32> sts)
: tag(sts(3,0)), internalError(sts(4,4)), decodeError(sts(5,5)), slaveError(sts(6,6)),
okay(sts(7,7)), bytesReceived(sts(30,8)), endOfPacket(sts(31,31)) {}
operator ap_uint<32>(){
ap_uint<32> ret;
ret(3,0) = tag;
ret(4,4) = internalError;
ret(5,5) = decodeError;
ret(6,6) = slaveError;
ret(7,7) = okay;
ret(30,8) = bytesReceived;
ret(31,31) = endOfPacket;
return ret;
}
};

} // End namespace axi
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