diff options
Diffstat (limited to 'src/import/chips/p9/procedures/hwp/memory/lib/workarounds/dp16_workarounds.H')
| -rw-r--r-- | src/import/chips/p9/procedures/hwp/memory/lib/workarounds/dp16_workarounds.H | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/src/import/chips/p9/procedures/hwp/memory/lib/workarounds/dp16_workarounds.H b/src/import/chips/p9/procedures/hwp/memory/lib/workarounds/dp16_workarounds.H index daf9780d6..ddee4f42a 100644 --- a/src/import/chips/p9/procedures/hwp/memory/lib/workarounds/dp16_workarounds.H +++ b/src/import/chips/p9/procedures/hwp/memory/lib/workarounds/dp16_workarounds.H @@ -5,7 +5,7 @@ /* */ /* OpenPOWER HostBoot Project */ /* */ -/* Contributors Listed Below - COPYRIGHT 2016,2018 */ +/* Contributors Listed Below - COPYRIGHT 2016,2019 */ /* [+] International Business Machines Corp. */ /* */ /* */ @@ -52,6 +52,48 @@ namespace mss namespace workarounds { +// Putting the NVDIMM workarounds here as it's a bit of a hybrid case +// Also there are issues as the nvdimm_workarounds.* files are picked up externally +namespace nvdimm +{ + +/// +/// @brief Updates a single RD DQ value for the NVDIMM workaround +/// @tparam P the bit position to update +/// @param[in,out] io_data the data bufffer to update +/// +template<uint64_t P> +void update_rd_dq_delay(fapi2::buffer<uint64_t>& io_data) +{ + constexpr uint64_t MAX_VALUE = 0x7f; + constexpr uint64_t OFFSET = 2; + constexpr uint64_t LEN = MCA_DDRPHY_DP16_READ_DELAY0_RANK_PAIR0_P0_0_01_RD_LEN; + uint64_t l_value = 0; + io_data.extractToRight<P, LEN>(l_value); + l_value += OFFSET; + l_value = std::min(l_value, MAX_VALUE); + io_data.insertFromRight<P, LEN>(l_value); +} + +/// +/// @brief Checks if the NVDIMM RD DQ delay adjust is needed +/// @param[in] i_target the fapi2 target of the port +/// @param[out] o_is_needed true if the workaround is needed +/// @return fapi2::ReturnCode FAPI2_RC_SUCCESS if ok +/// +fapi2::ReturnCode is_adjust_rd_dq_delay_needed( const fapi2::Target<fapi2::TARGET_TYPE_MCA>& i_target, + bool& o_is_needed ); + +/// +/// @brief Adjusts NVDIMM RD DQ delays +/// @param[in] i_target the fapi2 target of the port +/// @param[in] i_rp the rank pair on which to adjust delays +/// @return fapi2::ReturnCode FAPI2_RC_SUCCESS if ok +/// +fapi2::ReturnCode adjust_rd_dq_delay( const fapi2::Target<fapi2::TARGET_TYPE_MCA>& i_target, const uint64_t i_rp ); + +} // close namespace nvdimm + namespace dp16 { |
