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p9_query_cache_access_state.C
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p9_query_cache_access_state.C
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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/import/chips/p9/procedures/hwp/pm/p9_query_cache_access_state.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2016,2017 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
///
/// @file p9_query_cache_access_state.C
/// @brief Check the stop level for the EX caches and sets boolean scomable parameters
///
// *HWP HWP Owner: Christina Graves <clgraves@us.ibm.com>
// *HWP Backup HWP Owner: Greg Still <stillgs@us.ibm.com>
// *HWP FW Owner: Sangeetha T S <sangeet2@in.ibm.com>
// *HWP Team: PM
// *HWP Level: 2
// *HWP Consumed by: FSP:HS:SBE
///
///
///
/// @verbatim
/// High-level procedure flow:
/// - For the quad target, read the Stop State History register in the PPM
/// and use the actual stop level to determine if the quad has power and is being
/// clocked.
/// @endverbatim
///
//------------------------------------------------------------------------------
// ----------------------------------------------------------------------
// Includes
// ----------------------------------------------------------------------
#include <p9_quad_scom_addresses.H>
#include <p9_query_cache_access_state.H>
// ----------------------------------------------------------------------
// Constants
// ----------------------------------------------------------------------
const uint32_t eq_clk_l2_pos[] = {8, 9};
const uint32_t eq_clk_l3_pos[] = {6, 7};
const uint32_t SSH_REG_STOP_LEVEL = 8;
const uint32_t SSH_REG_STOP_LEVEL_LEN = 4;
// ----------------------------------------------------------------------
// Procedure Function
// ----------------------------------------------------------------------
fapi2::ReturnCode
p9_query_cache_access_state(
const fapi2::Target<fapi2::TARGET_TYPE_EQ>& i_target,
bool& o_l2_is_scomable,
bool& o_l2_is_scannable,
bool& o_l3_is_scomable,
bool& o_l3_is_scannable)
{
fapi2::buffer<uint64_t> l_qsshsrc;
uint32_t l_quadStopLevel = 0;
fapi2::buffer<uint64_t> l_data64;
bool l_is_scomable = 1;
uint8_t l_chpltNumber = 0;
uint32_t l_exPos = 0;
uint8_t l_execution_platform = 0;
uint32_t l_stop_state_reg = 0;
const fapi2::Target<fapi2::TARGET_TYPE_SYSTEM> FAPI_SYSTEM;
FAPI_INF("> p9_query_cache_access_state...");
//Get the stop state from the SSHRC in the EQPPM
//First figure out whether we should use the C_PPM_SSHFSP (if FSP platform) or C_PPM_SSHHYP (if HOST platform)
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_EXECUTION_PLATFORM, FAPI_SYSTEM, l_execution_platform),
"Error: Failed to get platform");
if (l_execution_platform == 0x02)
{
l_stop_state_reg = C_PPM_SSHFSP;
}
else
{
l_stop_state_reg = C_PPM_SSHHYP;
}
FAPI_TRY(fapi2::getScom(i_target, l_stop_state_reg, l_qsshsrc), "Error reading data from QPPM SSHSRC");
//A unit is scommable if clocks are running
//A unit is scannable if the unit is powered up
//Extract the core stop state
l_qsshsrc.extractToRight<uint32_t>(l_quadStopLevel, SSH_REG_STOP_LEVEL, SSH_REG_STOP_LEVEL_LEN);
FAPI_DBG("EQ Stop State: EQ(%d)", l_quadStopLevel);
//Set all attribtes to 1, then clear them based on the stop state
o_l2_is_scomable = 1;
o_l2_is_scannable = 1;
o_l3_is_scomable = 1;
o_l3_is_scannable = 1;
// STOP8 - Half Quad Deep Sleep
// VSU, ISU are powered off
// IFU, LSU are powered off
// PC, Core EPS are powered off
// L20-EX0 is clocked off if both cores are >= 8
// L20-EX1 is clocked off if both cores are >= 8
if (l_quadStopLevel >= 8)
{
o_l2_is_scomable = 0;
}
// STOP9 - Fast Winkle (lab use only)
// Both cores and cache are clocked off
if (l_quadStopLevel >= 9)
{
o_l3_is_scomable = 0;
}
// STOP11 - Deep Winkle
// Both cores and cache are powered off
if (l_quadStopLevel >= 11)
{
o_l2_is_scannable = 0;
o_l3_is_scannable = 0;
}
//Read clock status to confirm stop state history is accurate
//If we trust the stop state history, this could be removed to save on code size
//Compare Hardware status vs stop state status. If there is a mismatch the HW value overrides the stop state
FAPI_TRY(fapi2::getScom(i_target, EQ_CLOCK_STAT_SL, l_data64), "Error reading data from EQ_CLOCK_STAT_SL");
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_CHIP_UNIT_POS, i_target, l_chpltNumber),
"Error: Failed to get the position of the EX:0x%08X", i_target);
l_exPos = l_chpltNumber % 2;
l_is_scomable = !l_data64.getBit(eq_clk_l2_pos[l_exPos]);
if (o_l2_is_scomable != l_is_scomable)
{
FAPI_INF("Clock status didn't match stop state, overriding is_scomable status");
o_l2_is_scomable = l_is_scomable;
}
l_is_scomable = !l_data64.getBit(eq_clk_l3_pos[l_exPos]);
if (o_l3_is_scomable != l_is_scomable)
{
FAPI_INF("Clock status didn't match stop state, overriding is_scomable status");
o_l3_is_scomable = l_is_scomable;
}
fapi_try_exit:
FAPI_INF("< p9_query_cache_access_state...");
return fapi2::current_err;
}