diff options
Diffstat (limited to 'src/occ_405/wof/wof.c')
| -rw-r--r-- | src/occ_405/wof/wof.c | 202 |
1 files changed, 197 insertions, 5 deletions
diff --git a/src/occ_405/wof/wof.c b/src/occ_405/wof/wof.c index b5df7b2..b54b691 100644 --- a/src/occ_405/wof/wof.c +++ b/src/occ_405/wof/wof.c @@ -45,7 +45,7 @@ extern GpeRequest G_wof_vfrt_req; extern uint32_t G_pgpe_shared_sram_address; extern uint32_t G_pgpe_pstate_table_address; extern uint32_t G_pgpe_pstate_table_sz; - +extern uint32_t G_nest_frequency_mhz; //****************************************************************************** // Globals //****************************************************************************** @@ -933,6 +933,191 @@ void calculate_nest_leakage( void ) g_wof->idc_vdn = (G_oppb.iddq.ivdn*nest_mult) >> 10; } + +/** + * calculate_effective_capacitance + * + * Description: Generic function to perform the effective capacitance + * calculations. + * C_eff = I / (V^1.3 * F) + * + * I is the AC component of Idd in 0.01 Amps (or10 mA) + * V is the silicon voltage in 100 uV + * F is the frequency in MHz + * + * Note: Caller must ensure they check for a 0 return value + * and disable wof if that is the case + * + * Param[in]: i_iAC - the AC component + * Param[in]: i_voltage - the voltage component in 100uV + * Param[in]: i_frequency - the frequency component + * + * Return: The calculated effective capacitance + */ +uint32_t calculate_effective_capacitance( uint32_t i_iAC, + uint32_t i_voltage, + uint32_t i_frequency ) +{ + + // Prevent divide by zero + if( i_frequency == 0 ) + { + // Return 0 causing caller to disable wof. + return 0; + } + + // Compute V^1.3 using a best-fit equation + // (V^1.3) = (21374 * (voltage in 100uV) - 50615296)>>10 + uint32_t v_exp_1_dot_3 = (21374 * i_voltage - 50615296)>>10; + + // Compute I / (V^1.3) + uint32_t I = i_iAC << 14; // * 16384 + + // Prevent divide by zero + if( v_exp_1_dot_3 == 0 ) + { + // Return 0 causing caller to disable wof. + return 0; + } + + uint32_t c_eff = (I / v_exp_1_dot_3); + c_eff = c_eff << 14; // * 16384 + + // Divide by frequency and return the final value. + // (I / (V^1.3 * F)) == I / V^1.3 /F + return c_eff / i_frequency; + +} + + + +/** + * calculate_ceff_ratio_vdn + * + * Description: Function to calculate the effective capacitance ratio + * for the nest + */ +void calculate_ceff_ratio_vdn( void ) +{ + //TODO Read iac_tdp_vdn(@turbo) from OCCPstateParmBlock struct + g_wof->iac_tdp_vdn = 0; + + // Calculate Ceff_tdp_vdn + // iac_tdp_vdn / (VOLTVDN^1.3 * Fnest) + g_wof->ceff_tdp_vdn = + calculate_effective_capacitance( g_wof->iac_tdp_vdn, + g_wof->voltvdn_sensor, + G_nest_frequency_mhz ); + + // Calculate ceff_vdn + // iac_vdn/ (VOLTVDN^1.3 * Fnest) + g_wof->ceff_vdn = + calculate_effective_capacitance( g_wof->iac_vdn, + g_wof->voltvdn_sensor, + G_nest_frequency_mhz ); + + // Prevent divide by zero + if( g_wof->ceff_tdp_vdn == 0 ) + { + /* + * @errortype + * @moduleid CALC_CEFF_RATIO_VDN + * @reasoncode DIVIDE_BY_ZERO_ERROR + * @userdata1 0 + * @userdata4 OCC_NO_EXTENDED_RC + * @devdesc Divide by zero error on ceff_vdn / ceff_tdp_vdn + */ + errlHndl_t l_errl = createErrl( + CALC_CEFF_RATIO_VDN, + DIVIDE_BY_ZERO_ERROR, + OCC_NO_EXTENDED_RC, + ERRL_SEV_PREDICTIVE, + NULL, + DEFAULT_TRACE_SIZE, + 0, + 0 ); + + commitErrl( &l_errl ); + + // Return 0 + g_wof->ceff_ratio_vdn = 0; + + //TODO: RTC 166301 - call new disable_wof function + } + else + { + g_wof->ceff_ratio_vdn = g_wof->ceff_vdn / g_wof->ceff_tdp_vdn; + } +} + +/** + * calculate_ceff_ratio_vdd + * + * Description: Function to calculate the effective capacitance ratio + * for the core + */ +void calculate_ceff_ratio_vdd( void ) +{ + //TODO read iac_tdp_vdd from OCCPstateParmBlock struct + g_wof->iac_tdp_vdd = 0; + + // Get Vturbo and convert to 100uV (mV -> 100uV) = mV*10 + // Multiply by Vratio + uint32_t V = (G_oppb.operating_points[TURBO].vdd_mv*10) * g_wof->v_ratio; + + // Get Fturbo and multiply by Fratio + uint32_t F = G_oppb.operating_points[TURBO].frequency_mhz * g_wof->f_ratio; + + // Calculate ceff_tdp_vdd + // iac_tdp_vdd / ((Vturbo*Vratio)^1.3 * (Fturbo*Fratio)) + g_wof->ceff_tdp_vdd = + calculate_effective_capacitance( g_wof->iac_tdp_vdd, + V, + F ); + + // Calculate ceff_vdd + // iac_vdd / (Vclip^1.3 * Fclip) + g_wof->ceff_vdd = + calculate_effective_capacitance( g_wof->iac_vdd, + g_wof->v_clip, + g_wof->f_clip ); + + // Prevent divide by zero + if( g_wof->ceff_tdp_vdd == 0 ) + { + /* + * @errortype + * @moduleid CALC_CEFF_RATIO_VDD + * @reasoncode DIVIDE_BY_ZERO_ERROR + * @userdata1 0 + * @userdata4 OCC_NO_EXTENDED_RC + * @devdesc Divide by zero error on ceff_vdd / ceff_tdp_vdd + */ + errlHndl_t l_errl = createErrl( + CALC_CEFF_RATIO_VDD, + DIVIDE_BY_ZERO_ERROR, + OCC_NO_EXTENDED_RC, + ERRL_SEV_PREDICTIVE, + NULL, + DEFAULT_TRACE_SIZE, + 0, + 0 ); + + commitErrl( &l_errl ); + + // Return 0 + g_wof->ceff_ratio_vdd = 0; + + //TODO: RTC 166301 - call new disable_wof function + } + else + { + g_wof->ceff_ratio_vdd = g_wof->ceff_vdd / g_wof->ceff_tdp_vdd; + } +} + + + /** * calculate_AC_currents * @@ -1054,11 +1239,18 @@ int32_t calculate_multiplier( int32_t i_temp ) (int32_t)G_wof_iddq_mult_table[mult_idx+1][1]); } +/** + * read_sensor_data + * + * Description: One time place to read out all the sensors needed + * for wof calculations. First thing wof_main does. + */ void read_sensor_data( void ) { // Read out necessary Sensor data for WOF calculation - g_wof->curvdd_sensor = getSensorByGsid(CURVDD)->sample; - g_wof->curvdn_sensor = getSensorByGsid(CURVDN)->sample; - g_wof->voltvddsense_sensor = getSensorByGsid(VOLTVDDSENSE)->sample; - g_wof->tempnest_sensor = getSensorByGsid(TEMPNEST)->sample; + g_wof->curvdd_sensor = getSensorByGsid(CURVDD)->sample; + g_wof->curvdn_sensor = getSensorByGsid(CURVDN)->sample; + g_wof->voltvddsense_sensor = getSensorByGsid(VOLTVDDSENSE)->sample; + g_wof->tempnest_sensor = getSensorByGsid(TEMPNEST)->sample; + g_wof->voltvdn_sensor = getSensorByGsid(VOLTVDN)->sample; } |
