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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/include/usr/util/utiltce.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2013,2017 */
/* [+] 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 */
#ifndef __TCEIF_H
#define __TCEIF_H
#include <stdint.h>
#include <builtins.h>
#include <errl/errlentry.H>
#include <devicefw/userif.H>
#define UTILTCE_TRACE_NAME "UTILTCE"
namespace TCE
{
/*******************************************/
/* General TCE Enable/Disable Functions */
/*******************************************/
/**
* @brief Responsible for allocating TCEs
*
* @param[in] i_startingAddress - Starting physical address that the allocated
* TCEs will map to.
* Needs to be Page-Aligned or will fail.
* @param[in] i_size - Size of the address space that TCEs map to.
* Size must be less than (512K * PAGESIZE) or will fail.
* Assert if not greater than zero.
*
* Note: First time this is called will cause TCE Table to be created and
* the Processors to be setup to point at the TCE Table
*
* @return errlHndl_t - Return Error Handle if failed
*
*/
errlHndl_t utilAllocateTces(uint64_t i_startingAddress,
size_t i_size);
/**
* @brief Responsible for deallocating TCEs
*
* @param[in] i_startingAddress Starting physical address of the TCEs that
* are to be deallocated from the TCE Table.
* Needs to be page-aligned or will fail.
* @param[in] i_size - Size of address space that the TCEs that are to
* be deallocated map to.
* Size must be less than (512K * PAGESIZE) or will fail.
* Assert if not greater than zero.
*
* @return errlHndl_t - Return Error Handle if failed
*
*/
errlHndl_t utilDeallocateTces(uint64_t i_startingAddress,
size_t i_size);
/**
* @brief Responsible for disabling TCEs on the system, including
* clearing the TCE Table and disabling Processor settings
*
* @return errlHndl_t - Return Error Handle if failed
*
*/
errlHndl_t utilDisableTces(void);
/******************************************************/
/* Specific TCE Setup/Close Functions for PAYLOAD */
/******************************************************/
/**
* @brief Responsible for Setting up TCEs for PAYLOAD
*
* @return errlHndl_t - Return Error Handle if failed
*
*/
errlHndl_t utilSetupPayloadTces(void);
/**
* @brief Responsible for closing the TCEs for PAYLOAD
*
* @return errlHndl_t - Return Error Handle if failed
*
*/
errlHndl_t utilClosePayloadTces(void);
/******************************************************/
/* Miscellaneous Functions */
/******************************************************/
/**
* @brief Indicates if TCEs should be used for DMA path on the system
*
* @return bool - TRUE if TCEs should be used; False, if not
*
*/
bool utilUseTcesForDmas(void);
/**
* @brief Enables the System to use TCEs without setting up a TCE Table.
* This prevents the FSP from using unsecure DMAs during the IPL until
* Hostboot sets up the TCE Table with proper TCEs.
*
* @return errlHndl_t - Return Error Handle if failed
*
*/
errlHndl_t utilEnableTcesWithoutTceTable(void);
};
#endif
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