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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/pore/poreve/model/poreaddress.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* COPYRIGHT International Business Machines Corp. 2012,2014 */
/* */
/* 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 __VSBE_POREADDRESS_H
#define __VSBE_POREADDRESS_H
// $Id: poreaddress.H,v 1.2 2012/01/06 21:25:15 bcbrock Exp $
/// \file poreaddress.H
/// \brief A simple abstract PORE address that separates the memory space from
/// the offset.
#include <stdint.h>
namespace vsbe {
class PoreAddress;
}
////////////////////////////////////////////////////////////////////////////
// PoreAddress
////////////////////////////////////////////////////////////////////////////
/// A PORE address
///
/// PORE implements a segmented memory architecure. An address consists of a
/// 16-bit memory space identifier and a 32-bit byte offset within the memory
/// space. The memory space identifer denotes the physical memory interface
/// used for the memory (PIB or OCI). For PIB addresses, the memory space
/// also encodes direct vs. indirect memory access protocols.
///
/// Inside the PORE the memory space Id is held in the 16 high-order bits of
/// the program counter. Relative branches and relative subroutine branches
/// do not modify the memory space. All other branches, including immediate
/// branches, indirect (dereferenced) branches and return from subroutine
/// update the entire 48-bit PC, and hence change the default memory space.
///
/// The address registers also include an incomplete memory space field; the
/// field is incomplete because it does not include the PIB/Memory bit which
/// is implied. These memory space Ids are set by loading the registers. The
/// address register memory spaces are only valid for the SBE engine; for all
/// of the OCI-attached PORE engines the address registers only allow OCI
/// access and ignore the memory space Id.
///
/// Since this is a simple type (equivalent to a uint64_t) we allow the
/// compiler to create the copy and assignment operators for the class.
class
vsbe::PoreAddress {
public:
////////////////////////////// Creators //////////////////////////////
/// Construct an uninitialized PoreAddress
PoreAddress ();
/// Construct a PoreAddress from a memory space Id + offset
///
/// \param[in] i_memorySpace The 16-bit memory space descriptor
///
/// \param[in] i_offset The 32-bit byte address within the memory space
PoreAddress(uint16_t i_memorySpace, uint32_t i_offset);
/// Construct a PoreAddress from a right-justified uint64_t
///
/// \param[in] i_address;
PoreAddress(uint64_t i_address);
~PoreAddress();
//////////////////////////// Operators ////////////////////////////
/// Convert a PoreAddress to a uint64_t
operator uint64_t () const;
//////////////////////////// Manipulators ////////////////////////////
/// Convert a PIB address into a PoreAddress
///
/// \param[in] i_pibAddress Assumed to be the PIB address of a location in
/// a direct access PIB memory, the address is converted to the equivalent
/// PORE address form
///
/// \retval address A reference to the object
PoreAddress& setFromPibAddress(uint32_t i_pibAddress);
////////////////////////// Implementation ////////////////////////////
/// The byte offset within the memory space
uint32_t iv_offset;
/// The memory space identifier
uint16_t iv_memorySpace;
};
#endif // __VSBE_POREADDRESS_H
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