diff options
Diffstat (limited to 'src/import/chips/p9/procedures/hwp/memory/lib/phy/dp16.C')
| -rw-r--r-- | src/import/chips/p9/procedures/hwp/memory/lib/phy/dp16.C | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/src/import/chips/p9/procedures/hwp/memory/lib/phy/dp16.C b/src/import/chips/p9/procedures/hwp/memory/lib/phy/dp16.C index 39135d317..c20cac543 100644 --- a/src/import/chips/p9/procedures/hwp/memory/lib/phy/dp16.C +++ b/src/import/chips/p9/procedures/hwp/memory/lib/phy/dp16.C @@ -52,6 +52,7 @@ #include <generic/memory/lib/utils/c_str.H> #include <lib/workarounds/dp16_workarounds.H> +#include <generic/memory/lib/utils/mss_math.H> using fapi2::TARGET_TYPE_MCS; using fapi2::TARGET_TYPE_MCA; @@ -2206,19 +2207,37 @@ fapi2::ReturnCode reset_read_delay_offset_registers( const fapi2::Target<TARGET_ { typedef dp16Traits<TARGET_TYPE_MCA> TT; + // Represents the number phase rotator ticks per clock + constexpr int64_t TICKS_PER_CLK = 128; + // We grab the information from the VPD and blast it in to all the registers. Note the - // VPD is picoseconds but the register wants clocks - so we convert. Likewise, the VPD + // VPD is picoseconds but the register wants phase rotator ticks - so we convert. Likewise, the VPD // is per port so we can easily cram the data in to the port using the blastah. fapi2::buffer<uint64_t> l_data; - int64_t l_clocks = 0; + int64_t l_phase_rot_ticks = 0; int16_t l_windage = 0; + int64_t l_tck_in_ps = 0; + uint64_t l_freq = 0; + + + FAPI_TRY( mss::vpd_mt_windage_rd_ctr(i_target, l_windage), + "Failed vpd_mt_windage_rd_ctr accessor for %s", mss::c_str(i_target) ); - FAPI_TRY( mss::vpd_mt_windage_rd_ctr(i_target, l_windage) ); - l_clocks = mss::ps_to_cycles(i_target, l_windage); + FAPI_TRY( mss::freq(mss::find_target<fapi2::TARGET_TYPE_MCBIST>(i_target), l_freq), + "Failed freq accessor for %s", mss::c_str(i_target) ); + + FAPI_TRY( mss::freq_to_ps(l_freq, l_tck_in_ps), + "Failled to convert freq_to_ps for %s", mss::c_str(i_target) ); + + // Static cast to be explicit that calculation should produce a floating point result + l_phase_rot_ticks = mss::round_half_away_from_zero( (l_windage * TICKS_PER_CLK) / static_cast<double>(l_tck_in_ps) ); l_data - .insertFromRight<TT::READ_OFFSET_LOWER, TT::READ_OFFSET_LOWER_LEN>(l_clocks) - .insertFromRight<TT::READ_OFFSET_UPPER, TT::READ_OFFSET_UPPER_LEN>(l_clocks); + .insertFromRight<TT::READ_OFFSET_LOWER, TT::READ_OFFSET_LOWER_LEN>(l_phase_rot_ticks) + .insertFromRight<TT::READ_OFFSET_UPPER, TT::READ_OFFSET_UPPER_LEN>(l_phase_rot_ticks); + + FAPI_INF( "vpd_mt_windage_rd_ctr = %d, ticks = %d for %s", + l_windage, l_phase_rot_ticks, mss::c_str(i_target) ); FAPI_TRY( mss::scom_blastah(i_target, TT::READ_DELAY_OFFSET_REG, l_data) ); |
