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[/] [openrisc/] [trunk/] [orpsocv2/] [bench/] [sysc/] [include/] [JtagDriverSC.h] - Rev 234
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// ---------------------------------------------------------------------------- // SystemC JTAG driver header // Copyright (C) 2008 Embecosm Limited <info@embecosm.com> // Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> // This file is part of the cycle accurate model of the OpenRISC 1000 based // system-on-chip, ORPSoC, built using Verilator. // This program is free software: you can redistribute it and/or modify it // under the terms of the GNU Lesser General Public License as published by // the Free Software Foundation, either version 3 of the License, or (at your // option) any later version. // This program is distributed in the hope that it will be useful, but WITHOUT // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public // License for more details. // You should have received a copy of the GNU Lesser General Public License // along with this program. If not, see <http://www.gnu.org/licenses/>. // ---------------------------------------------------------------------------- // $Id: JtagDriverSC.h 317 2009-02-22 19:52:12Z jeremy $ #ifndef JTAG_DRIVER_SC__H #define JTAG_DRIVER_SC__H #include <stdint.h> #include "systemc" #include "JtagSC_includes.h" //! Module providing TAP requests to JTAG //! Provides a queue of requests to the JTAG interface. Requests are at the //! level of TAP actions for reset, DR-Scan or IR-Scan. class JtagDriverSC : public sc_core::sc_module { public: // Constructor JtagDriverSC (sc_core::sc_module_name name, sc_core::sc_fifo<TapAction *> *_tapActionQueue); private: // JTAG instructions static const uint32_t CHAIN_SELECT_IR = 0x3; //!< Chain Select instruction static const uint32_t DEBUG_IR = 0x8; //!< Debug instruction // JTAG register lengths (excluding CRC) static const int JTAG_IR_LEN = 4; //!< JTAG instr reg length static const int CHAIN_DR_LEN = 4; //!< Length of DR (excl CRC) static const int RISC_DEBUG_DR_LEN = 65; //!< Length of DR (excl CRC) static const int REGISTER_DR_LEN = 38; //!< Length of DR (excl CRC) static const int WISHBONE_DR_LEN = 65; //!< Length of DR (excl CRC) // JTAG register address masks static const uint32_t RISC_DEBUG_ADDR_MASK = 0xffffffff; //!< Mask for addr static const uint32_t REGISTER_ADDR_MASK = 0x0000001f; //!< Mask for addr static const uint32_t WISHBONE_ADDR_MASK = 0xffffffff; //!< Mask for addr // JTAG register R/W bit static const uint64_t RISC_DEBUG_RW = 0x100000000ULL; //!< R/W bit mask static const uint64_t REGISTER_RW = 0x000000020ULL; //!< R/W bit mask static const uint64_t WISHBONE_RW = 0x100000000ULL; //!< R/W bit mask // JTAG register data field offsets static const int RISC_DEBUG_DATA_OFF = 33; //!< Offset to data field static const int REGISTER_DATA_OFF = 6; //!< Offset to data field static const int WISHBONE_DATA_OFF = 33; //!< Offset to data field //! JTAG register data field sizes (all the same) static const int DR_DATA_LEN = 32; //! CRC length static const int CRC_LEN = 8; // OpenRISC 1000 scan chains static const int OR1K_SC_UNDEF = -1; //!< Undefined OR1K scan chain static const int OR1K_SC_RISC_DEBUG = 1; //!< for access to SPRs static const int OR1K_SC_REGISTER = 4; //!< to stall/reset CPU static const int OR1K_SC_WISHBONE = 5; //!< for memory access //! Register addresses for the REGISTER scan chain static const uint8_t OR1K_RSC_RISCOP = 0x04; //!< Used to reset/stall CPU // Bits for the RISCOP register static const uint32_t RISCOP_STALL = 0x00000001; //!< Stall the CPU static const uint32_t RISCOP_RESET = 0x00000002; //!< Reset the CPU //! The JTAG fifo we queue on sc_core::sc_fifo<TapAction *> *tapActionQueue; //! The currently selected scan chain int currentScanChain; // SystemC thread to queue actions void queueActions (); // Or1k JTAG actions void reset (); void selectChain (int chain); uint32_t readReg (uint32_t addr); uint32_t readReg1 (uint32_t addr, int bitSizeNoCrc); uint32_t readReg1 (uint64_t *dRegArray, uint32_t addr, int bitSizeNoCrc); void writeReg (uint32_t addr, uint32_t data); // Utilities to compute CRC-8 the OpenRISC way. Versions for "big" and // "small" numbers. uint8_t crc8 (uint64_t data, int size); uint8_t crc8 (uint64_t *dataArray, int size); // Utilities to insert and extract bit strings from vectors void insertBits (uint64_t str, int strLen, uint64_t *array, int startBit); uint64_t extractBits (uint64_t *array, int startBit, int strLen); }; // JtagDriverSC () #endif // JTAG_DRIVER_SC__H
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