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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/xscom/xscom.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2011,2015 */
/* [+] 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 __XSCOM_H
#define __XSCOM_H
/** @file xscom.H
* @brief Provides the interfaces to perform XSCom
*/
#include <stdint.h>
#include <limits.h>
/**
* @brief Max number of retries if XSCOM fails with certain errors
*/
#define MAX_XSCOM_RETRY 1
/**
* @brief The (fixed) base address value for master proc
*/
// @todo-RTC:128077 XSCOM support for P9
#define MASTER_PROC_XSCOM_BASE_ADDR 0x0006010000000000
/**
* @brief Type definition for XSCom address and Chip ID
*/
typedef uint32_t XSComAddress_t;
typedef uint16_t XSComChipId_t;
typedef uint16_t XSComNodeId_t;
typedef uint64_t XSComBase_t;
namespace XSCOM
{
enum CpuType
{
CurThreadCpu,
TargetCpu
};
struct XscomAddrType_t
{
uint32_t addr;
CpuType target_type;
};
#define XSCOM_BUFFER_SIZE 8 // 8 bytes
/**
* @brief Performs an XSCom access operation
* This function performs an XSCom access operation. It follows a pre-defined
* prototype functions in order to be registered with the device-driver
* framework.
*
* @param[in] i_opType Operation type, see DeviceFW::OperationType
* in driverif.H
* @param[in] i_target XSCom target
* @param[in/out] io_buffer Read: Pointer to output data storage
* Write: Pointer to input data storage
* @param[in/out] io_buflen Input: size of io_buffer (in bytes)
* Output:
* Read: Size of output data
* Write: Size of data written
* @param[in] i_accessType DeviceFW::AccessType enum (usrif.H)
* @param[in] i_args This is an argument list for DD framework.
* In this function, there's only one argument,
* which is the MMIO XSCom address
* @return errlHndl_t
*/
errlHndl_t xscomPerformOp(DeviceFW::OperationType i_opType,
TARGETING::Target* i_target,
void* io_buffer,
size_t& io_buflen,
int64_t i_accessType,
va_list i_args);
/**
* @brief Abstracts HMER register of a P8 (Murano/Venice) chip
*/
class HMER
{
public:
/**
* @brief Constructor
*/
ALWAYS_INLINE inline HMER()
{
mRegister = 0;
}
/**
* @brief Constructor that takes in a value
*/
explicit ALWAYS_INLINE inline HMER(uint64_t val)
{
mRegister = val;
}
/**
* @brief Conversion operator
*/
ALWAYS_INLINE inline operator uint64_t() const
{
return mRegister;
}
/**
* @brief Operator=
*/
ALWAYS_INLINE inline uint64_t operator = (uint64_t val)
{
return mRegister = val;
}
// Layout of HMER register parts
union
{
uint64_t mRegister;
struct
{
uint64_t :8;
uint64_t mXSComFail:1;
uint64_t mXSComDone:1;
uint64_t :11;
uint64_t mXSComStatus:3;
uint64_t :40;
};
};
};
/**
* @brief This class contains necessary information to build an XSCOM
* address for a P8/Salerno chip.
*/
class XSComP8Address
{
public:
/**
* @brief Constructor of XSComP8Address class
*
* @param[in] i_addr PCB address of the register being accessed
*
* @return None
*/
ALWAYS_INLINE inline XSComP8Address(const XSComAddress_t i_addr);
/**
* @brief Conversion operator
*/
ALWAYS_INLINE inline operator uint64_t() const;
/**
* @brief Return the address' 64-bit full offset
*
* @return uint64_t
*/
ALWAYS_INLINE inline uint64_t offset(void) const;
private:
/**
* @brief Disabled copy constructor and assignment operator
*/
XSComP8Address(const XSComP8Address& i_right);
XSComP8Address& operator=(const XSComP8Address& right);
// Layout of XSCOM address parts
union
{
uint64_t mMmioAddress; // mMmio address
struct
{
uint64_t mReserved1:18; // Not currently used (0:17)
uint64_t mBaseAddress:5; // Base address (18:22)
uint64_t mNodeId:3; // Node where target resides (23:25)
uint64_t mChipId:3; // Targeted chip ID (26:28)
uint64_t mSComAddrHi:27; // PCB Address High (29:55)
uint64_t mCacheLine:1; // Cached line (56)
uint64_t mSComAddrLo:4; // PCB Address low (57:60)
uint64_t mAlign:3; // Align (61:63)
} mAddressParts;
};
}; // End XSComP8Address class
//-----------------------------------------------------------------------
// In-line functions
//-----------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
XSComP8Address::XSComP8Address(const XSComAddress_t i_addr)
:mMmioAddress(0)
{
// Relative address of Node 0, chip 0
// The chip's nodeId and chip id will be taken into account
// when calculating its XSCOM base address
mAddressParts.mSComAddrHi = i_addr >> 4; // Get 27-bits
mAddressParts.mSComAddrLo = i_addr; // Get 4 bits
}
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
XSComP8Address::operator uint64_t() const
{
return mMmioAddress;
}
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
uint64_t XSComP8Address::offset(void) const
{
return (mMmioAddress / sizeof(uint64_t));
}
};
#endif
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