| Line 77... |
Line 77... |
and U2 (q, m, a);
|
and U2 (q, m, a);
|
|
|
endmodule
|
endmodule
|
|
|
// 2-input MUTEX cell, Nangate
|
// 2-input MUTEX cell, Nangate
|
module mutex ( a, b, qa, qb ); // !!! dont touch !!!
|
module mutex2 ( a, b, qa, qb ); // !!! dont touch !!!
|
|
|
input a, b; // request inputs
|
input a, b; // request inputs
|
output qa, qb; // grant outputs
|
output qa, qb; // grant outputs
|
|
|
wire qan, qbn; // internal wires
|
wire qan, qbn; // internal wires
|
| Line 118... |
Line 118... |
input ntgnt; // the negative combined grant input
|
input ntgnt; // the negative combined grant input
|
|
|
wire n1, n2; // internal wires
|
wire n1, n2; // internal wires
|
wire [1:0] mgnt; // outputs of the MUTEX
|
wire [1:0] mgnt; // outputs of the MUTEX
|
|
|
mutex ME ( .a(req[0]), .b(req[1]), .qa(mgnt[0]), .qb(mgnt[1]) );
|
mutex2 ME ( .a(req[0]), .b(req[1]), .qa(mgnt[0]), .qb(mgnt[1]) );
|
c2n C0 ( .a(ntgnt), .b(n2), .q(ngnt[0]) );
|
c2n C0 ( .a(ntgnt), .b(n2), .q(ngnt[0]) );
|
c2n C1 ( .a(ntgnt), .b(n1), .q(ngnt[1]) );
|
c2n C1 ( .a(ntgnt), .b(n1), .q(ngnt[1]) );
|
nand U1 (treq, n1, n2);
|
nand U1 (treq, n1, n2);
|
nand U2 (n1, ngnt[0], mgnt[1]);
|
nand U2 (n1, ngnt[0], mgnt[1]);
|
nand U3 (n2, ngnt[1], mgnt[0]);
|
nand U3 (n2, ngnt[1], mgnt[0]);
|
