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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/include/usr/runtime/tce.H $ */
/* */
/* IBM CONFIDENTIAL */
/* */
/* COPYRIGHT International Business Machines Corp. 2013 */
/* */
/* p1 */
/* */
/* Object Code Only (OCO) source materials */
/* Licensed Internal Code Source Materials */
/* IBM HostBoot Licensed Internal Code */
/* */
/* The source code for this program is not published or otherwise */
/* divested of its trade secrets, irrespective of what has been */
/* deposited with the U.S. Copyright Office. */
/* */
/* Origin: 30 */
/* */
/* IBM_PROLOG_END_TAG */
#ifndef __TCE_H
#define __TCE_H
#include <stdint.h>
#include <builtins.h>
#include <errl/errlentry.H>
#include <devicefw/userif.H>
struct TceEntry
{
// TCE Table
union
{
uint64_t WholeTceEntry;
struct {
uint64_t realPageNumber :52; // real page number
uint64_t valid :1; // The tces is valid for IO
uint64_t reserved :9; // reserved bits
uint64_t writeAccess :1; // Write access allowed
uint64_t readAccess :1; // Read access allowed
};
};
};
/** @class TceMgr
* @brief Responsible for managing the TCE entries
*
*/
class TceMgr
{
private:
/** Indicator of TCEs being intialized */
int tceEntryInit;
/** Pointer to the Mapped TCE Table */
TceEntry *tceTableVaPtr;
/** physical address of the TCE Table */
uint64_t tceTablePhysAddr;
//** Max number of TCE entries - via size*/
uint64_t maxTceEntries;
/** size of the Tce Table */
uint64_t tceTableSize;
/**
* @brief Responsible for mapping the TCE Table
*
* @return errlHndl_t - Return error log if unsuccessful
*
*/
errlHndl_t mapTceTable(void);
public:
/**
* @brief Constructor. Initializes instance variables.
* @param[in/default] i_tableAddr - Starting address of the TCE
* table.. Default address is TCE_TABLE_ADDR. This was added
* for testing TCE entries and not using the "real" table
* @param[in/default] i_tableSize - Size of the TCE table. Default value
* is TCE_TABLE_SIZE
*/
TceMgr(uint64_t i_tableAddr = TCE_TABLE_ADDR,
uint64_t i_tableSize = TCE_TABLE_SIZE);
/**
* Destructor.
* No action necessary.
*/
~TceMgr();
/** Max TCE Entries for the TCE Table */
enum
{
NUM_TCE_TABLE_ENTRIES = 0x80000, // 512k entries
};
enum
{
INVALID_TOKEN_ENTRY = 0xFFFFFFFFFFFFFFFF,
};
/**
* @brief Responsible for initalizing the TCE Table and mapping the
* TCEtable
*
* @return errlHndl_t - Return error log if unsuccessful
*
*/
errlHndl_t createTceTable();
/**
* @brief Responsible for setting up the Processors to point to the TCE
* table
*
* @return errlHndl_t - Return error log if unsuccessful
*
*/
errlHndl_t initTceInHdw();
/**
* @brief Responsible for allocating TCE Entries
*
* @param[in] i_startingAddress - Starting address to TCE
* @param[in] i_size - Size of the address space
* @param[out] startingToken - Starting Entry into the table.
* (this is an offset into the array based on the
* TCE index * PAGESIZE. Each TCE entry maps to a
* pagesize of memory)
*
* @return errl - Return Error Handle if failed.
*
*/
errlHndl_t allocateTces(uint64_t i_startingAddress,
uint64_t i_size,
uint64_t& o_startingToken);
/**
* @brief Responsible for deallocating TCE Entries
*
* @param[in] i_startingToken - Token indicating the starting entry to
* remove
* @param[in] i_size - Size of memory space to remove TCE entries
* associated
*
* @return errl - Return Error Handle if fatal failure occurred.
*
*/
errlHndl_t deallocateTces(uint64_t i_startingToken,
uint64_t i_size);
};
#endif
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