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[/] [openrisc/] [trunk/] [or1ksim/] [debug/] [jtag.h] - Rev 584
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/* jtag.c -- JTAG modeling Copyright (C) 2010 Embecosm Limited Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator. This program is free software; you can redistribute it and/or modify it under the terms of the GNU 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* This program is commented throughout in a fashion suitable for processing with Doxygen. */ #ifndef JTAG__H #define JTAG__H /*! Enumeration of the JTAG instruction types */ enum jtag_instr { JI_UNDEFINED = -1, /* Won't fit in bitfield */ JI_EXTEST = 0x0, JI_SAMPLE_PRELOAD = 0x1, JI_IDCODE = 0x2, JI_DEBUG = 0x8, JI_MBIST = 0x9, JI_BYPASS = 0xf }; /*! Enumeration of the JTAG module IDs */ enum jtag_mod_id { JM_UNDEFINED = -1, /* Won't fit in bitfield */ JM_WISHBONE = 0x0, JM_CPU0 = 0x1, JM_CPU1 = 0x2 }; /*! Enumeration of the DEBUG command types */ enum jtag_cmd { JCMD_UNDEFINED = -1, /* Won't fit in bitfield */ JCMD_GO_COMMAND = 0x0, JCMD_READ_COMMAND = 0x1, JCMD_WRITE_COMMAND = 0x2, JCMD_READ_CONTROL = 0x3, JCMD_WRITE_CONTROL = 0x4 }; /*! Enumeration of the access types for WRITE_COMMAND */ enum jtag_acc_type { JAT_UNDEFINED = -1, /* Won't fit in bitfield */ JAT_WRITE8 = 0, /* WishBone only */ JAT_WRITE16 = 1, /* WishBone only */ JAT_WRITE32 = 2, JAT_READ8 = 4, /* WishBone only */ JAT_READ16 = 5, /* WishBone only */ JAT_READ32 = 6 }; /*! Enumeration of the status field bits */ enum jtag_status { JS_OK = 0x0, /*!< No error */ JS_CRC_IN_ERROR = 0x1, /*!< Supplied CRC error */ JS_MODULE_MISSING = 0x2, /*!< Non-existent module select */ JS_WISHBONE_ERROR = 0x4, /*!< Problem accessing Wishgone */ JS_OVER_UNDERRUN = 0x8 /*!< Over/under-run of data */ }; /*! Enumeration of the control bits */ enum jtag_control_bits { JCB_RESET = 51, /*!< Reset the processor */ JCB_STALL = 50, /*!< Stall the processor */ }; /* Function prototypes for external use */ extern void jtag_init (); extern void jtag_reset (); extern void jtag_shift_ir (unsigned char *jreg, int num_bits); extern void jtag_shift_dr (unsigned char *jreg, int num_bits); #endif /* JTAG__H */
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