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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/import/chips/p9/procedures/hwp/nest/p9_l3_flush.C $ */
/* */
/* OpenPOWER sbe Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2015,2017 */
/* [+] 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_l3_flush.C
/// @brief Initiates an L3 purge request
///
/// *HWP HWP Owner: Benjamin Gass <bgass@us.ibm.com>
/// *HWP FW Owner: Thi Tran thi@us.ibm.com
/// *HWP Team: Nest
/// *HWP Level: 3
/// *HWP Consumed by: FSP and SBE
/// ----------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Includes
//--------------------------------------------------------------------------
#include <p9_l3_flush.H>
#include <p9_quad_scom_addresses.H>
#include <p9_quad_scom_addresses_fld.H>
//--------------------------------------------------------------------------
// Constant definitions
//--------------------------------------------------------------------------
// L3 purge operation delay times for HW/sim
const uint32_t P9_L3_FLUSH_HW_NS_DELAY = 50000;
const uint32_t P9_L3_FLUSH_SIM_CYCLE_DELAY = 1000000;
// If the L3 purge is not completed in P9_L3_FLUSH_TIMEOUT delays, fail with error
const uint32_t P9_L3_FLUSH_TIMEOUT_COUNT = 40;
//--------------------------------------------------------------------------
// HWP entry point
//--------------------------------------------------------------------------
// TODO: RTC 177535 - Do we support SINGLE_PURGE/DELETE?
fapi2::ReturnCode p9_l3_flush(
const fapi2::Target<fapi2::TARGET_TYPE_EX>& i_target,
const uint32_t i_purge_type,
const uint32_t i_purge_addr)
{
// mark HWP entry
FAPI_DBG("Entering ...\n");
fapi2::buffer<uint64_t> purge_reg_data(0x0);
uint32_t purge_pending_count = 0;
//Make sure that the inputs are acceptable
//Make sure the purge type is full purge, single purge, single delete, full blind, or dynamic
//Make sure that the purge address fits withing bits 17:28
FAPI_ASSERT(!((i_purge_type != L3_FULL_PURGE) &&
(i_purge_type != L3_SINGLE_PURGE) &&
(i_purge_type != L3_FULL_BLIND_PURGE) &&
(i_purge_type != L3_DYNAMIC_PURGE)) &&
(i_purge_addr < 0x1000),
fapi2::P9_L3_FLUSH_INVALID_ARGS_ERR()
.set_TARGET(i_target)
.set_PURGETYPE(i_purge_type)
.set_PURGEADDR(i_purge_addr),
"i_purge_type is not a compatible type");
//Make sure that another flush is not happening
FAPI_DBG("Verifying that a previous flush is not active");
FAPI_TRY(fapi2::getScom(i_target, EX_PRD_PURGE_REG, purge_reg_data));
FAPI_ASSERT(!(purge_reg_data.getBit<EX_PRD_PURGE_REG_L3_REQ>()),
fapi2::P9_L3_FLUSH_PREVIOUS_PURGE_ACTIVE_ERR()
.set_TARGET(i_target)
.set_PURGEREG(purge_reg_data),
"Previous Purge request has not completed error");
//Since there is no previous purge, build the purge request
//Flush the data and set the req bit to initiate the purge
purge_reg_data.flush<0>().setBit<EX_PRD_PURGE_REG_L3_REQ>();
//set the type of the purge
purge_reg_data.insertFromRight<EX_PRD_PURGE_REG_L3_TTYPE,
EX_PRD_PURGE_REG_L3_TTYPE_LEN> (i_purge_type);
//set the address of where to start for the address
purge_reg_data.insertFromRight<EX_PRD_PURGE_REG_L3_DIR_ADDR,
EX_PRD_PURGE_REG_L3_DIR_ADDR_LEN> (i_purge_addr);
//Write the purge request
FAPI_TRY(fapi2::putScom(i_target, EX_PRD_PURGE_REG, purge_reg_data));
//Spin on PRD_PURGE_REQ until hardware clears it
while(purge_pending_count < P9_L3_FLUSH_TIMEOUT_COUNT)
{
FAPI_DBG("Waiting for purge to complete...");
FAPI_TRY(fapi2::delay(P9_L3_FLUSH_HW_NS_DELAY,
P9_L3_FLUSH_SIM_CYCLE_DELAY));
FAPI_TRY(fapi2::getScom(i_target, EX_PRD_PURGE_REG, purge_reg_data));
if (!purge_reg_data.getBit<EX_PRD_PURGE_REG_L3_REQ>())
{
FAPI_DBG("Purge complete!");
break;
}
purge_pending_count++;
}
FAPI_ASSERT(purge_pending_count < P9_L3_FLUSH_TIMEOUT_COUNT,
fapi2::P9_L3_FLUSH_PURGE_REQ_TIMEOUT_ERR()
.set_TARGET(i_target)
.set_PURGETYPE(i_purge_type)
.set_PURGEADDR(i_purge_addr)
.set_EX_PRD_PURGE_REG_DATA(purge_reg_data),
"Purge did not complete in time.");
fapi_try_exit:
FAPI_DBG("Exiting...");
return fapi2::current_err;
}
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