diff options
Diffstat (limited to 'src/import/chips/p9/procedures/hwp/perv/p9_sbe_tp_chiplet_init1.C')
| -rw-r--r-- | src/import/chips/p9/procedures/hwp/perv/p9_sbe_tp_chiplet_init1.C | 62 |
1 files changed, 53 insertions, 9 deletions
diff --git a/src/import/chips/p9/procedures/hwp/perv/p9_sbe_tp_chiplet_init1.C b/src/import/chips/p9/procedures/hwp/perv/p9_sbe_tp_chiplet_init1.C index 3855979f..dac6a42a 100644 --- a/src/import/chips/p9/procedures/hwp/perv/p9_sbe_tp_chiplet_init1.C +++ b/src/import/chips/p9/procedures/hwp/perv/p9_sbe_tp_chiplet_init1.C @@ -5,7 +5,7 @@ /* */ /* OpenPOWER sbe Project */ /* */ -/* Contributors Listed Below - COPYRIGHT 2015,2018 */ +/* Contributors Listed Below - COPYRIGHT 2015,2019 */ /* [+] International Business Machines Corp. */ /* */ /* */ @@ -41,6 +41,7 @@ #include <p9_perv_scom_addresses.H> #include <p9_perv_scom_addresses_fld.H> #include <p9n2_perv_scom_addresses_fld.H> +#include <p9a_perv_scom_addresses_fld.H> #include <p9_perv_sbe_cmn.H> #include <p9_sbe_common.H> @@ -55,6 +56,48 @@ enum P9_SBE_TP_CHIPLET_INIT1_Private_Constants SCAN_TYPES_TIME_GPTR_REPR = 0x230 }; +#ifndef __PPE__ +/// @brief Switch PCB mux via CFAM +/// +/// @param[in] i_target_chip Reference to TARGET_TYPE_PROC_CHIP +/// @param[in] i_new_position Desired new mux position (bit position in ROOT_CTRL0) +/// @return FAPI2_RC_SUCCESS if success, else error code. +static fapi2::ReturnCode switch_pcb_mux_cfam( + const fapi2::Target<fapi2::TARGET_TYPE_PROC_CHIP>& i_target_chip, + const uint32_t i_new_position) +{ + fapi2::buffer<uint32_t> l_pcb_reset, l_mux_select; + + l_pcb_reset.flush<0>().setBit<PERV_ROOT_CTRL0_PCB_RESET_DC>(); + + l_mux_select.flush<0>() + .setBit<P9A_PERV_ROOT_CTRL0_PIB2PCB_DC>() + .setBit<P9A_PERV_ROOT_CTRL0_PCB2PCB_DC>(); + + FAPI_DBG("Setting PCB RESET bit in ROOT_CTRL0_REG"); + FAPI_TRY(fapi2::putCfamRegister(i_target_chip, PERV_ROOT_CTRL0_SET_FSI, l_pcb_reset)); + + // This will unconditionally set both bits (PIB2PCB, PCB2PCB), switching to a safe + // intermediate state from either of the two settings. + FAPI_DBG("Setting PCB mux to intermediate state"); + FAPI_TRY(fapi2::putCfamRegister(i_target_chip, PERV_ROOT_CTRL0_SET_FSI, l_mux_select)); + + // We CLEAR the bit corresponding to the desired new position in l_mux_select + // and then use the CLEAR address of RC0 to effectively clear the _other_ bit, + // so that the bit left standing is our desired new position. + FAPI_DBG("Setting PCB mux to final state"); + l_mux_select.clearBit(i_new_position); + FAPI_TRY(fapi2::putCfamRegister(i_target_chip, PERV_ROOT_CTRL0_CLEAR_FSI, l_mux_select)); + + FAPI_DBG("Clearing PCB RESET bit in ROOT_CTRL0_REG"); + FAPI_TRY(fapi2::putCfamRegister(i_target_chip, PERV_ROOT_CTRL0_CLEAR_FSI, l_pcb_reset)); + +fapi_try_exit: + return fapi2::current_err; + +} +#endif + fapi2::ReturnCode p9_sbe_tp_chiplet_init1(const fapi2::Target<fapi2::TARGET_TYPE_PROC_CHIP>& i_target_chip) { @@ -102,12 +145,14 @@ fapi2::ReturnCode p9_sbe_tp_chiplet_init1(const #ifndef __PPE__ - if(l_is_axone) + if (l_is_axone) { - FAPI_DBG("Release PCB Reset"); - //PIB.ROOT_CTRL0.PCB_RESET_DC = 0 - l_data64_root_ctrl0.clearBit<PERV_ROOT_CTRL0_SET_PCB_RESET_DC>(); - FAPI_TRY(fapi2::putScom(i_target_chip, PERV_ROOT_CTRL0_SCOM, l_data64_root_ctrl0)); + /* + * In some lab configurations, the SBE might have done these exact steps + * before us already, but it won't hurt to do them all again. + */ + FAPI_DBG("Switch PCB mux to PIB2PCB position"); + FAPI_TRY(switch_pcb_mux_cfam(i_target_chip, P9A_PERV_ROOT_CTRL0_PIB2PCB_DC)); FAPI_DBG("Set Chiplet Enable"); //PIB.PERV_CTRL0.TP_CHIPLET_EN_DC = 1 @@ -130,9 +175,8 @@ fapi2::ReturnCode p9_sbe_tp_chiplet_init1(const FAPI_DBG("l_clk_regions value: %#018lX", l_clk_regions); FAPI_TRY(p9_sbe_common_clock_start_stop(l_tpchiplet, START_CMD, 0, 0, l_clk_regions, CLOCK_TYPES_ALL)); - FAPI_DBG("Switching to PCB2PCB path"); - FAPI_TRY(p9_perv_sbe_cmn_switch_to_pcb2pcb_path_scom( - i_target_chip)); + FAPI_DBG("Switch PCB mux to PCB2PCB position"); + FAPI_TRY(switch_pcb_mux_cfam(i_target_chip, P9A_PERV_ROOT_CTRL0_PCB2PCB_DC)); //Getting ROOT_CTRL0 register value again as it is changed in above function FAPI_TRY(fapi2::getScom(i_target_chip, PERV_ROOT_CTRL0_SCOM, |
