diff options
Diffstat (limited to 'src/import/chips/p9/procedures/hwp/nest/p9_l2_flush.C')
| -rwxr-xr-x | src/import/chips/p9/procedures/hwp/nest/p9_l2_flush.C | 75 |
1 files changed, 71 insertions, 4 deletions
diff --git a/src/import/chips/p9/procedures/hwp/nest/p9_l2_flush.C b/src/import/chips/p9/procedures/hwp/nest/p9_l2_flush.C index ec447cdb..9aa10514 100755 --- a/src/import/chips/p9/procedures/hwp/nest/p9_l2_flush.C +++ b/src/import/chips/p9/procedures/hwp/nest/p9_l2_flush.C @@ -5,7 +5,7 @@ /* */ /* OpenPOWER sbe Project */ /* */ -/* Contributors Listed Below - COPYRIGHT 2015,2017 */ +/* Contributors Listed Below - COPYRIGHT 2015,2019 */ /* [+] International Business Machines Corp. */ /* */ /* */ @@ -58,6 +58,72 @@ enum //------------------------------------------------------------------------------ /// See doxygen in header file +fapi2::ReturnCode purgeReadyCheck( + const fapi2::Target<fapi2::TARGET_TYPE_EX>& i_target, + const uint64_t i_busyCount, + fapi2::buffer<uint64_t>& o_prdPurgeCmdReg) +{ + FAPI_DBG("Entering purgeReadyCheck"); + uint64_t l_loopCount = 0; + + do + { + FAPI_TRY(fapi2::getScom(i_target, EX_PRD_PURGE_CMD_REG, o_prdPurgeCmdReg), + "Error from getScom EX_PRD_PURGE_CMD_REG"); + + // Check the EX_PRD_PURGE_CMD_REG_BUSY bit from scom register + if ( !o_prdPurgeCmdReg.getBit(EX_PRD_PURGE_CMD_REG_PRGSM_BUSY)) + { + // PURGE is done, get out + break; + } + else + { + l_loopCount++; + + if (l_loopCount > i_busyCount) + { + // Time out, exit loop + break; + } + + // Delay 10ns for each loop + FAPI_TRY(fapi2::delay(P9_L2_FLUSH_HW_NS_DELAY, + P9_L2_FLUSH_SIM_CYCLE_DELAY), + "Fapi Delay call failed."); + } + } + while (1); + + // Error out if still busy + if (l_loopCount > i_busyCount) + { + // engine busy, dump status + FAPI_DBG("Purge engine busy (reg_busy = %d, busy_on_this = %d," + " sm_busy = %d)", + o_prdPurgeCmdReg.getBit<EX_PRD_PURGE_CMD_REG_BUSY>(), + o_prdPurgeCmdReg.getBit<EX_PRD_PURGE_CMD_REG_PRGSM_BUSY_ON_THIS>(), + o_prdPurgeCmdReg.getBit<EX_PRD_PURGE_CMD_REG_PRGSM_BUSY>()); + + FAPI_ASSERT(false, fapi2::P9_PURGE_READY_COMPLETE_TIMEOUT() + .set_TARGET(i_target) + .set_COUNT_THRESHOLD(i_busyCount) + .set_CMD_REG(o_prdPurgeCmdReg), + "Previous purge request has not completed prior to issuing L2 flush."); + } + + if (o_prdPurgeCmdReg.getBit<EX_PRD_PURGE_CMD_REG_ERR>()) + { + FAPI_INF("WARNING: EX_PRD_PURGE_CMD_REG_ERR set prior to L2 flush"); + } + +fapi_try_exit: + FAPI_DBG("Exiting purgeReadyCheck - Counter: %d; prdPurgeCmdReg: 0x%.16llX", + l_loopCount, o_prdPurgeCmdReg); + return fapi2::current_err; +} + +/// See doxygen in header file fapi2::ReturnCode purgeCompleteCheck( const fapi2::Target<fapi2::TARGET_TYPE_EX>& i_target, const uint64_t i_busyCount, @@ -79,7 +145,7 @@ fapi2::ReturnCode purgeCompleteCheck( "Purge failed. EX_PRD_PURGE_CMD_REG_ERR set"); // Check the EX_PRD_PURGE_CMD_REG_BUSY bit from scom register - if ( !o_prdPurgeCmdReg.getBit(EX_PRD_PURGE_CMD_REG_BUSY) ) + if ( !o_prdPurgeCmdReg.getBit(EX_PRD_PURGE_CMD_REG_BUSY)) { // PURGE is done, get out break; @@ -140,6 +206,7 @@ fapi2::ReturnCode setupAndTriggerPrdPurge( // ensure PURGE_CMD_TYPE/MEM/CGC/BANK are clear to specify flush // of entire cache FAPI_DBG("Write L2 Purge Engine Command Register to initiate cache flush"); + l_cmdReg.clearBit<EX_PRD_PURGE_CMD_REG_ERR>(); l_cmdReg.insert<EX_PRD_PURGE_CMD_REG_TYPE, EX_PRD_PURGE_CMD_REG_TYPE_LEN>(i_purgeData.iv_cmdType); l_cmdReg.insert<EX_PRD_PURGE_CMD_REG_MEM, @@ -176,8 +243,8 @@ fapi2::ReturnCode l2_flush_start( // Ensure that purge engine is idle before starting flush // poll Purge Engine status - FAPI_TRY(purgeCompleteCheck(i_target, 0, l_cmdReg), // 0 = no wait - "Error returned from purgeCompleteCheck call"); + FAPI_TRY(purgeReadyCheck(i_target, P9_L2_FLUSH_MAX_POLLS, l_cmdReg), // 0 = no wait + "Error returned from purgeReadyCheck call"); FAPI_TRY(setupAndTriggerPrdPurge(i_target, i_purgeData, l_cmdReg), "Error returned from setupAndTriggerPrdPurge"); |
