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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/import/chips/p9/procedures/hwp/nest/p9_adu_setup.C $ */
/* */
/* OpenPOWER sbe Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2015,2016 */
/* [+] 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_adu_setup.C
/// @brief Setup the registers for a read/write to the ADU
//
// *HWP HWP Owner: Christina Graves clgraves@us.ibm.com
// *HWP FW Owner: Thi Tran thi@us.ibm.com
// *HWP Team: Nest
// *HWP Level: 2
// *HWP Consumed by: SBE
//
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Includes
//--------------------------------------------------------------------------
#include <p9_adu_setup.H>
#include <p9_adu_coherent_utils.H>
extern "C"
{
//--------------------------------------------------------------------------
// HWP entry point
//--------------------------------------------------------------------------
fapi2::ReturnCode p9_adu_setup(const fapi2::Target<fapi2::TARGET_TYPE_PROC_CHIP>
& i_target,
const uint64_t i_address,
const bool i_rnw,
const uint32_t i_flags,
uint32_t& o_numGranules)
{
//return code
uint32_t num_attempts = 1;
bool lock_pick = false;
// mark HWP entry
FAPI_DBG("Entering ...\n");
//ADU status/control information
bool adu_is_dirty = false;
bool adu_leave_dirty = i_flags & FLAG_LEAVE_DIRTY;
//check arguments
FAPI_TRY(p9_adu_coherent_utils_check_args(i_target, i_address, i_flags),
"Error from p9_adu_coherent_utils_check_args");
//ensure fabric is running
FAPI_TRY(p9_adu_coherent_utils_check_fbc_state(i_target),
"Error from p9_adu_coherent_utils_check_fbc_status");
//reset ADU state machines and status register
FAPI_TRY(p9_adu_coherent_utils_reset_adu(i_target), "p9_adu_setup: Error from p9_adu_coherent_utils_reset_adu");
//acquire ADU lock to guarantee exclusive use of the ADU resources
lock_pick = i_flags & FLAG_LOCK_PICK;
num_attempts = i_flags & FLAG_LOCK_TRIES;
FAPI_TRY(p9_adu_coherent_manage_lock(i_target, lock_pick, true, num_attempts),
"Error from p9_adu_coherent_manage_lock");
//figure out how many granules can be requested before setup needs to be run again
FAPI_TRY(p9_adu_coherent_utils_get_num_granules(i_address, o_numGranules),
"Error from p9_adu_coherent_utils_get_num_granules");
//Set dirty since we need to attempt to cleanup/release the lock so the ADU is not in a locked state if operation fails from this point
adu_is_dirty = true;
//setup the ADU registers for the read/write
FAPI_TRY(p9_adu_coherent_setup_adu(i_target, i_address, i_rnw, i_flags),
"Error from p9_adu_coherent_setup_registers");
fapi_try_exit:
fapi2::ReturnCode saveError = fapi2::current_err;
//if an error has occurred, ADU is dirty, and instructed to clean up,
//attempt to reset ADU and free lock (propogate rc of original fail)
if (fapi2::current_err && adu_is_dirty && !adu_leave_dirty)
{
(void) p9_adu_coherent_utils_reset_adu(i_target);
(void) p9_adu_coherent_manage_lock(i_target, false, false, num_attempts);
}
FAPI_DBG("Exiting...");
return saveError;
}
} // extern "C"
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