int SIM_crossbar_init(SIM_power_crossbar_t *crsbar, int model, u_int n_in, u_int n_out, u_int data_width, u_int degree, int connect_type, int trans_type, double in_len, double out_len, double *req_len)
{
double in_length, out_length, ctr_length, Nsize, in_wire_cap;
if ((crsbar->model = model) && model < CROSSBAR_MAX_MODEL) {
crsbar->n_in = n_in;
crsbar->n_out = n_out;
crsbar->data_width = data_width;
crsbar->degree = degree;
crsbar->connect_type = connect_type;
crsbar->trans_type = trans_type;
/* redundant field */
crsbar->mask = HAMM_MASK(data_width);
crsbar->n_chg_in = crsbar->n_chg_int = crsbar->n_chg_out = crsbar->n_chg_ctr = 0;
switch (model) {
case MATRIX_CROSSBAR:
/* FIXME: need accurate spacing */
in_length = n_out * data_width * CrsbarCellWidth;
out_length = n_in * data_width * CrsbarCellHeight;
if (in_length < in_len) in_length = in_len;
if (out_length < out_len) out_length = out_len;
ctr_length = in_length / 2;
if (req_len) *req_len = in_length;
in_wire_cap = in_length * CC3metal;
crsbar->e_chg_out = SIM_crossbar_out_cap(out_length, n_in, connect_type, trans_type, &Nsize) * EnergyFactor;
crsbar->e_chg_in = SIM_crossbar_in_cap(in_wire_cap, n_out, connect_type, trans_type, &Nsize) * EnergyFactor;
//crsbar->e_chg_out = SIM_crossbar_out_cap(out_length, n_in, connect_type, trans_type, NULL) * EnergyFactor;
//crsbar->e_chg_in = SIM_crossbar_in_cap(in_length, n_out, connect_type, trans_type, NULL) * EnergyFactor;
/* FIXME: wire length estimation, really reset? */
/* control signal should reset after transmission is done, so no 1/2 */
crsbar->e_chg_ctr = SIM_crossbar_ctr_cap(ctr_length, data_width, 0, 0, 0, connect_type, trans_type) * EnergyFactor;
crsbar->e_chg_int = 0;
break;
case MULTREE_CROSSBAR:
/* input wire horizontal segment length */
in_length = n_in * data_width * CrsbarCellWidth * (n_out / 2);
in_wire_cap = in_length * CCmetal;
/* input wire vertical segment length */
in_length = n_in * data_width * (5 * Lamda) * (n_out / 2);
in_wire_cap += in_length * CC3metal;
ctr_length = n_in * data_width * CrsbarCellWidth * (n_out / 2) / 2;
crsbar->e_chg_out = SIM_crossbar_out_cap(0, degree, connect_type, trans_type, NULL) * EnergyFactor;
crsbar->e_chg_in = SIM_crossbar_in_cap(in_wire_cap, n_out, connect_type, trans_type, NULL) * EnergyFactor;
crsbar->e_chg_int = SIM_crossbar_int_cap(degree, connect_type, trans_type) * EnergyFactor;
/* redundant field */
crsbar->depth = (u_int)ceil(log(n_in) / log(degree));
/* control signal should reset after transmission is done, so no 1/2 */
if (crsbar->depth == 1)
/* only one level of control signal */
crsbar->e_chg_ctr = SIM_crossbar_ctr_cap(ctr_length, data_width, 0, 0, degree, connect_type, trans_type) * EnergyFactor;
else {
/* first level and last level control signals */
crsbar->e_chg_ctr = SIM_crossbar_ctr_cap(ctr_length, data_width, 0, 1, degree, connect_type, trans_type) * EnergyFactor +
SIM_crossbar_ctr_cap(0, data_width, 1, 0, degree, connect_type, trans_type) * EnergyFactor;
/* intermediate control signals */
if (crsbar->depth > 2)
crsbar->e_chg_ctr += (crsbar->depth - 2) * SIM_crossbar_ctr_cap(0, data_width, 1, 1, degree, connect_type, trans_type) * EnergyFactor;
}
break;
}
return 0;
}
else
return -1;
}
int SIM_crossbar_init(SIM_power_crossbar_t *crsbar, int model, u_int n_in, u_int n_out, u_int in_seg, u_int out_seg, u_int data_width, u_int degree, int connect_type, int trans_type, double in_len, double out_len, double *req_len)
{
double in_length, out_length, ctr_length, Nsize, in_wire_cap, I_static;
if ((crsbar->model = model) && model < CROSSBAR_MAX_MODEL) {
crsbar->n_in = n_in;
crsbar->n_out = n_out;
crsbar->in_seg = 0;
crsbar->out_seg = 0;
crsbar->data_width = data_width;
crsbar->degree = degree;
crsbar->connect_type = connect_type;
crsbar->trans_type = trans_type;
/* redundant field */
crsbar->mask = HAMM_MASK(data_width);
crsbar->n_chg_in = crsbar->n_chg_int = crsbar->n_chg_out = crsbar->n_chg_ctr = 0;
switch (model) {
case MATRIX_CROSSBAR:
crsbar->in_seg = in_seg;
crsbar->out_seg = out_seg;
/* FIXME: need accurate spacing */
in_length = n_out * data_width * CrsbarCellWidth;
out_length = n_in * data_width * CrsbarCellHeight;
if (in_length < in_len) in_length = in_len;
if (out_length < out_len) out_length = out_len;
ctr_length = in_length / 2;
if (req_len) *req_len = in_length;
in_wire_cap = in_length * CC3metal;
crsbar->e_chg_out = SIM_crossbar_out_cap(out_length, n_in, out_seg, connect_type, trans_type, &Nsize) * EnergyFactor;
crsbar->e_chg_in = SIM_crossbar_in_cap(in_wire_cap, n_out, in_seg, connect_type, trans_type, &Nsize) * EnergyFactor;
/* FIXME: wire length estimation, really reset? */
/* control signal should reset after transmission is done, so no 1/2 */
crsbar->e_chg_ctr = SIM_crossbar_ctr_cap(ctr_length, data_width, 0, 0, 0, connect_type, trans_type) * EnergyFactor;
crsbar->e_chg_int = 0;
/* static power */
I_static = 0;
/* tri-state buffers */
I_static += ((Woutdrvnandp * (NAND2_TAB[0] + NAND2_TAB[1] + NAND2_TAB[2]) + Woutdrvnandn * NAND2_TAB[3]) / 4 +
(Woutdrvnorp * NOR2_TAB[0] + Woutdrvnorn * (NOR2_TAB[1] + NOR2_TAB[2] + NOR2_TAB[3])) / 4 +
Woutdrivern * NMOS_TAB[0] + Woutdriverp * PMOS_TAB[0]) * n_in * n_out * data_width;
/* input driver */
I_static += (Wdecinvn * NMOS_TAB[0] + Wdecinvp * PMOS_TAB[0]) * n_in * data_width;
/* output driver */
I_static += (Woutdrivern * NMOS_TAB[0] + Woutdriverp * PMOS_TAB[0]) * n_out * data_width;
/* control signal inverter */
I_static += (Wdecinvn * NMOS_TAB[0] + Wdecinvp * PMOS_TAB[0]) * n_in * n_out;
crsbar->I_static = I_static / PARM(TECH_POINT) * 100;
break;
case MULTREE_CROSSBAR:
/* input wire horizontal segment length */
in_length = n_in * data_width * CrsbarCellWidth * (n_out / 2);
in_wire_cap = in_length * CCmetal;
/* input wire vertical segment length */
in_length = n_in * data_width * (5 * Lamda) * (n_out / 2);
in_wire_cap += in_length * CC3metal;
ctr_length = n_in * data_width * CrsbarCellWidth * (n_out / 2) / 2;
crsbar->e_chg_out = SIM_crossbar_out_cap(0, degree, 0, connect_type, trans_type, NULL) * EnergyFactor;
crsbar->e_chg_in = SIM_crossbar_in_cap(in_wire_cap, n_out, 0, connect_type, trans_type, NULL) * EnergyFactor;
crsbar->e_chg_int = SIM_crossbar_int_cap(degree, connect_type, trans_type) * EnergyFactor;
/* redundant field */
crsbar->depth = (u_int)ceil(log(n_in) / log(degree));
/* control signal should reset after transmission is done, so no 1/2 */
if (crsbar->depth == 1)
/* only one level of control signal */
crsbar->e_chg_ctr = SIM_crossbar_ctr_cap(ctr_length, data_width, 0, 0, degree, connect_type, trans_type) * EnergyFactor;
else {
/* first level and last level control signals */
crsbar->e_chg_ctr = SIM_crossbar_ctr_cap(ctr_length, data_width, 0, 1, degree, connect_type, trans_type) * EnergyFactor +
SIM_crossbar_ctr_cap(0, data_width, 1, 0, degree, connect_type, trans_type) * EnergyFactor;
/* intermediate control signals */
if (crsbar->depth > 2)
crsbar->e_chg_ctr += (crsbar->depth - 2) * SIM_crossbar_ctr_cap(0, data_width, 1, 1, degree, connect_type, trans_type) * EnergyFactor;
}
/* static power */
I_static = 0;
/* input driver */
I_static += (Wdecinvn * NMOS_TAB[0] + Wdecinvp * PMOS_TAB[0]) * n_in * data_width;
/* output driver */
I_static += (Woutdrivern * NMOS_TAB[0] + Woutdriverp * PMOS_TAB[0]) * n_out * data_width;
/* mux */
I_static += (WdecNORp * NOR2_TAB[0] + WdecNORn * (NOR2_TAB[1] + NOR2_TAB[2] + NOR2_TAB[3])) / 4 * (2 * n_in - 1) * n_out * data_width;
/* control signal inverter */
I_static += (Wdecinvn * NMOS_TAB[0] + Wdecinvp * PMOS_TAB[0]) * n_in * n_out;
crsbar->I_static = I_static / PARM(TECH_POINT) * 100;
break;
case CUT_THRU_CROSSBAR:
/* only support 4x4 now */
in_length = 2 * data_width * MAX(CrsbarCellWidth, CrsbarCellHeight);
ctr_length = in_length / 2;
crsbar->e_chg_in = SIM_crossbar_io_cap(in_length) * EnergyFactor;
crsbar->e_chg_out = 0;
/* control signal should reset after transmission is done, so no 1/2 */
crsbar->e_chg_ctr = SIM_crossbar_ctr_cap(ctr_length, data_width, 0, 0, 0, TRISTATE_GATE, 0) * EnergyFactor;
crsbar->e_chg_int = 0;
break;
default: /* some error handler */
break;
}
return 0;
}
else
return -1;
}