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// $Id$
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// $Id$
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#ifndef DEBUG_UNIT_SC__H
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#ifndef DEBUG_UNIT_SC__H
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#define DEBUG_UNIT_SC__H
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#define DEBUG_UNIT_SC__H
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// Define if no cache is wanted
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// Define if no cache is wanted
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#define NOCACHE
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#define NOCACHE
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#include <stdint.h>
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#include <stdint.h>
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#include "JtagSC_includes.h"
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#include "JtagSC_includes.h"
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#include "OrpsocAccess.h"
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#include "OrpsocAccess.h"
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#include "SprCache.h"
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#include "SprCache.h"
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#include "MemCache.h"
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#include "MemCache.h"
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//-----------------------------------------------------------------------------
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//-----------------------------------------------------------------------------
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//! Module modeling the OpenRISC 1000 Debug Unit
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//! Module modeling the OpenRISC 1000 Debug Unit
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//! Provides a high level interface to the GDB Server module with functions to
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//! Provides a high level interface to the GDB Server module with functions to
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//! access SPRs, Wishbone memory and CPU control.
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//! access SPRs, Wishbone memory and CPU control.
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//! Provides a low level interface to the Embecosm SystemC JTAG interface,
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//! Provides a low level interface to the Embecosm SystemC JTAG interface,
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//! queueing requests to read and write JTAG registers.
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//! queueing requests to read and write JTAG registers.
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//-----------------------------------------------------------------------------
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//-----------------------------------------------------------------------------
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class DebugUnitSC
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class DebugUnitSC:public sc_core::sc_module {
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: public sc_core::sc_module
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{
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public:
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public:
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// Constructor and destructor
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// Constructor and destructor
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DebugUnitSC (sc_core::sc_module_name name,
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DebugUnitSC (sc_core::sc_module_name name,
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sc_core::sc_fifo<TapAction *> *_tapActionQueue);
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sc_core::sc_fifo < TapAction * >*_tapActionQueue);
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~DebugUnitSC ();
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~DebugUnitSC ();
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// Reset function for the debug unit
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// Reset function for the debug unit
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void resetDebugUnit ();
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void resetDebugUnit ();
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void unstall ();
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void unstall ();
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bool isStalled ();
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bool isStalled ();
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// Functions to access SPRs
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// Functions to access SPRs
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uint32_t readSpr (uint16_t sprNum);
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uint32_t readSpr (uint16_t sprNum);
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void writeSpr (uint16_t sprNum,
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void writeSpr(uint16_t sprNum, uint32_t value);
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uint32_t value);
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void andSpr(uint16_t sprNum, uint32_t value);
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void andSpr (uint16_t sprNum,
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void orSpr(uint16_t sprNum, uint32_t value);
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uint32_t value);
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void orSpr (uint16_t sprNum,
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uint32_t value);
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// Functions to access memory
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// Functions to access memory
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uint32_t readMem32 (uint32_t addr);
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uint32_t readMem32 (uint32_t addr);
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bool writeMem32 (uint32_t addr,
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bool writeMem32(uint32_t addr, uint32_t value);
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uint32_t value);
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uint8_t readMem8 (uint32_t addr);
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uint8_t readMem8 (uint32_t addr);
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bool writeMem8 (uint32_t addr,
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bool writeMem8(uint32_t addr, uint8_t value);
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uint8_t value);
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private:
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private:
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// JTAG instructions
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// JTAG instructions
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static const uint32_t CHAIN_SELECT_IR = 0x3; //!< Chain Select instruction
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static const uint32_t CHAIN_SELECT_IR = 0x3; //!< Chain Select instruction
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static const int DUSEL_OPCODE_LEN = 4; //!< length of opcode field
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static const int DUSEL_OPCODE_LEN = 4; //!< length of opcode field
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static const int DUSEL_CRC_OFF = DUSEL_OPCODE_OFF + DUSEL_OPCODE_LEN; //!< start of CRC field
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static const int DUSEL_CRC_OFF = DUSEL_OPCODE_OFF + DUSEL_OPCODE_LEN; //!< start of CRC field
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static const int DUSEL_CRC_LEN = 32; //!< length of CRC field
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static const int DUSEL_CRC_LEN = 32; //!< length of CRC field
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static const int DUSEL_RESP_STATUS_OFF = DUSEL_CRC_OFF + DUSEL_CRC_LEN;
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static const int DUSEL_RESP_STATUS_OFF = DUSEL_CRC_OFF + DUSEL_CRC_LEN;
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static const int DUSEL_RESP_STATUS_LEN = 4;
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static const int DUSEL_RESP_STATUS_LEN = 4;
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static const int DUSEL_RESP_CRC_OFF = DUSEL_RESP_STATUS_OFF + DUSEL_RESP_STATUS_LEN;
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static const int DUSEL_RESP_CRC_OFF =
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DUSEL_RESP_STATUS_OFF + DUSEL_RESP_STATUS_LEN;
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static const int DUSEL_RESP_CRC_LEN = 32;
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static const int DUSEL_RESP_CRC_LEN = 32;
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static const uint32_t DBG_CRC32_POLY = 0x04c11db7;
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static const uint32_t DBG_CRC32_POLY = 0x04c11db7;
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// OpenRISC 1000 scan chains (values in DUSEL data register field)
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// OpenRISC 1000 scan chains (values in DUSEL data register field)
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static const int OR1K_SC_UNDEF = -1; //!< Undefined OR1K scan chain
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static const int OR1K_SC_UNDEF = -1; //!< Undefined OR1K scan chain
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static const int OR1K_SC_WISHBONE = 0; //!< for memory access
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static const int OR1K_SC_WISHBONE = 0; //!< for memory access
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static const int OR1K_SC_CPU0 = 1; //!< for access to CPU0
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static const int OR1K_SC_CPU0 = 1; //!< for access to CPU0
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static const int OR1K_SC_CPU1 = 2; //!< for access to CPU1
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static const int OR1K_SC_CPU1 = 2; //!< for access to CPU1
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// JTAG RISC_DEBUG (for accessing SPR) data register fields
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// JTAG RISC_DEBUG (for accessing SPR) data register fields
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static const int RISC_DEBUG_DR_LEN = 74; //!< Total RISC_DEBUG DR size
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static const int RISC_DEBUG_DR_LEN = 74; //!< Total RISC_DEBUG DR size
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static const int RISC_DEBUG_ADDR_OFF = 0; //!< start of address field
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static const int RISC_DEBUG_ADDR_OFF = 0; //!< start of address field
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static const int RISC_DEBUG_ADDR_LEN = 32; //!< length of address field
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static const int RISC_DEBUG_ADDR_LEN = 32; //!< length of address field
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static const int RISC_DEBUG_RW_OFF = 32; //!< start of read/write field
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static const int RISC_DEBUG_RW_OFF = 32; //!< start of read/write field
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//! The NPC is special, so we need to know about it
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//! The NPC is special, so we need to know about it
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static const int SPR_NPC = 0x10;
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static const int SPR_NPC = 0x10;
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//! The JTAG fifo we queue on
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//! The JTAG fifo we queue on
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sc_core::sc_fifo<TapAction *> *tapActionQueue;
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sc_core::sc_fifo < TapAction * >*tapActionQueue;
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//! The processor stall state. When stalled we can use cacheing on
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//! The processor stall state. When stalled we can use cacheing on
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//! reads/writes of memory and SPRs.
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//! reads/writes of memory and SPRs.
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enum {
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enum {
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UNKNOWN,
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UNKNOWN,
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void writeRiscop (uint32_t value);
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void writeRiscop (uint32_t value);
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// Or1k JTAG actions
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// Or1k JTAG actions
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void selectDebugModule (int chain);
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void selectDebugModule (int chain);
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uint32_t readJtagReg (uint32_t addr);
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uint32_t readJtagReg (uint32_t addr);
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uint32_t readJtagReg1 (uint32_t addr,
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uint32_t readJtagReg1(uint32_t addr, int bitSizeNoCrc);
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int bitSizeNoCrc);
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uint32_t readJtagReg1 (uint64_t *dRegArray,
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uint32_t readJtagReg1 (uint64_t *dRegArray,
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uint32_t addr,
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uint32_t addr, int bitSizeNoCrc);
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int bitSizeNoCrc);
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void writeJtagReg(uint32_t addr, uint32_t data);
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void writeJtagReg (uint32_t addr,
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uint32_t data);
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// Utilities to pack and unpack bits to/from data registers.
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// Utilities to pack and unpack bits to/from data registers.
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void clearBits (uint64_t regArray[],
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void clearBits(uint64_t regArray[], int regBits);
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int regBits);
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void packBits (uint64_t regArray[],
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void packBits (uint64_t regArray[],
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int fieldOffset,
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int fieldOffset, int fieldBits, uint64_t fieldVal);
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int fieldBits,
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uint64_t fieldVal);
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uint64_t unpackBits (uint64_t regArray[],
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uint64_t unpackBits (uint64_t regArray[],
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int fieldOffset,
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int fieldOffset, int fieldBits);
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int fieldBits);
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// Utility to compute CRC-8 the OpenRISC way.
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// Utility to compute CRC-8 the OpenRISC way.
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uint8_t crc8 (uint64_t dataArray[],
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uint8_t crc8(uint64_t dataArray[], int size);
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int size);
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// Utility to compute CRC-32 for the debug unit
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// Utility to compute CRC-32 for the debug unit
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uint32_t crc32 (uint64_t dataArray[],
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uint32_t crc32(uint64_t dataArray[], int size, int offset);
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int size,
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int offset);
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// Functions to bitreverse values
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// Functions to bitreverse values
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uint32_t bit_reverse_swar_2(uint32_t x);
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uint32_t bit_reverse_swar_2(uint32_t x);
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uint32_t bit_reverse_swar_4(uint32_t x);
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uint32_t bit_reverse_swar_4(uint32_t x);
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uint32_t bit_reverse_swar_8(uint32_t x);
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uint32_t bit_reverse_swar_8(uint32_t x);
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uint32_t bit_reverse_swar_16(uint32_t x);
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uint32_t bit_reverse_swar_16(uint32_t x);
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uint32_t bit_reverse_swar_32(uint32_t x);
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uint32_t bit_reverse_swar_32(uint32_t x);
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#define BITREV(x,y) bit_reverse_data(x,y)
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#define BITREV(x,y) bit_reverse_data(x,y)
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uint32_t bit_reverse_data(uint32_t x, int length);
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uint32_t bit_reverse_data(uint32_t x, int length);
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}; // DebugUnitSC ()
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}; // DebugUnitSC ()
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#endif // DEBUG_UNIT_SC__H
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#endif // DEBUG_UNIT_SC__H
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