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jeremybenn |
/* Remote debugging interface for JTAG debugging protocol.
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JTAG connects to or1k target ops. See or1k-tdep.c
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Copyright 1993-1995, 2000 Free Software Foundation, Inc.
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Copyright 2008 Embecosm Limited
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Contributed by Cygnus Support. Written by Marko Mlinar
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<markom@opencores.org>
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Areas noted by (CZ) were modified by Chris Ziomkowski <chris@asics.ws>
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*---------------------------------------------------------------------------*/
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/*!Updated for GDB 6.8 by Jeremy Bennett. All code converted to ANSI C style
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and in general to GDB format. All global OpenRISC specific functions and
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variables should now have a prefix of or1k_ or OR1K_.
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The coding for the local JTAG connections assumes a Xilinx JP1 port
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connecting via the local parallel port. Constants and routines processing
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these have the prefix jp1_ or JP1_. Remote connections use the OpenRISC
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remote JTAG protocol.
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The interface is layered
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The highest level is the public functions, which operate in terms of
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entities that are visible in GDB: open & close the connection, read and
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write SPRs, read and write memory, stall and unstall the
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processor. These functions always succeed Function prefixes: or1k_jtag_
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The next level is the abstraction provided by the OR1K Remote JTAG
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protocol: read/write a JTAG register, read/write a block of JTAG registers
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and select a scan chain. These functions may encounter errors and will deal
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with them, but otherwise return no error result. Static function prefixes:
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or1k_jtag_
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The next level is the two sets corresponding to the remote JTAG protocol,
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one for use with a locally connected (JP1) JTAG and one for a remote
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connection. These functions deal with errors and return an error code to
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indicate an error has occurred. Static function prefixes: jp1_ and jtr_
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respectively.
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The final level comes in separate flavours for local use (low level
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routines to drive JTAG) and remote use (to build and send/receive
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packets). These functions deal with errors and return an error code to
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indicate an error has occurred. Static function prefixes: jp1_ll_ and
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jtr_ll_ respectively.
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Errors are either dealt with silently or (if fatal) via the GDB error()
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function.
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@note Few people use the JP1 direct connection, and there is no
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confidence that this code works at all!
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Commenting compatible with Doxygen added throughout. */
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/*---------------------------------------------------------------------------*/
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#include "defs.h"
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#include "inferior.h"
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#include "bfd.h"
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#include "symfile.h"
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#include "gdb_wait.h"
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#include "gdbcmd.h"
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#include "gdbcore.h"
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#include "serial.h"
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#include "target.h"
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#include "gdb_string.h"
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#include "or1k-tdep.h"
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#include "or1k-jtag.h"
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/* Added by CZ 24/05/01 */
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#include <sys/poll.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <inttypes.h>
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/* Wait times (us) */
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#define OR1K_JTAG_FAST_WAIT 1 /*!< Wait us when single stepping */
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#define OR1K_JTAG_SLOW_WAIT 1000 /*!< Wait us when not single stepping */
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/* Bit numbers in packets for the JP1 JTAG pins */
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#define JP1_TCK 0x01 /*!< JTAG TCK pin */
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#define JP1_TRST 0x02 /*!< JTAG TRST pin */
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#define JP1_TMS 0x04 /*!< JTAG TMS pin */
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#define JP1_TDI 0x08 /*!< JTAG TDI pin */
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#define JP1_TDO 0x80 /*!< JTAG TDO pin */
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#define JP1_WAIT()
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#define JP1_RETRY_WAIT() (usleep (100))
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#define JP1_NUM_RETRIES 16
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/*! Selects crc trailer size in bits. Currently supported: 8 */
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#define JP1_CRC_SIZE 8
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static int jp1_crc_r; /*!< CRC of current read data */
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static int jp1_crc_w = 0; /*!< CRC of current written data */
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/*! Designates whether we are in SELECT_DR state */
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static int or1k_select_dr = 0;
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/*! Scan chain info. */
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static int jp1_chain_addr_size[] = { 0, 32, 0, 0, 5 };
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static int jp1_chain_data_size[] = { 0, 32, 0, 32, 32 };
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static int jp1_chain_is_valid[] = { 0, 1, 0, 1, 1 };
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static int jp1_chain_has_crc[] = { 0, 1, 0, 1, 1 };
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static int jp1_chain_has_rw[] = { 0, 1, 0, 0, 1 };
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/*! Currently selected scan chain - just to prevent unnecessary transfers. */
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static int or1k_jtag_current_chain;
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/*! Information about the JTAG connection, if any */
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struct {
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union {
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int lp; /* Printer compatible device we have open. */
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int fd; /* Socket for remote or1k jtag interface */
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} device;
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enum {
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OR1K_JTAG_NOT_CONNECTED,
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OR1K_JTAG_LOCAL,
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OR1K_JTAG_REMOTE
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} location;
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} or1k_jtag_connection;
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/*! Global variable identifying the debug interface version. Assume
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consistency with GDB 5.3, unless otherwise corrected. */
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enum or1k_dbg_if_version_enum or1k_dbg_if_version = OR1K_DBG_IF_ORPSOC;
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/* Forward declarations of the public interface functions */
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void or1k_jtag_init (char *args);
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void or1k_jtag_close ();
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ULONGEST or1k_jtag_read_spr (unsigned int sprnum);
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void or1k_jtag_write_spr (unsigned int sprnum,
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ULONGEST data);
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int or1k_jtag_read_mem (CORE_ADDR addr,
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gdb_byte *bdata,
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int len);
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int or1k_jtag_write_mem (CORE_ADDR addr,
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const gdb_byte *bdata,
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int len);
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void or1k_jtag_stall ();
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void or1k_jtag_unstall ();
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void or1k_jtag_wait (int fast);
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/* Forward declarations for the low level JP1 routines. */
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static int jp1_ll_crc_calc (int crc,
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int input_bit);
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static void jp1_ll_reset_jp1 ();
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static unsigned char jp1_ll_read_jp1 ();
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static void jp1_ll_write_jp1 (unsigned char tms,
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unsigned char tdi);
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static ULONGEST jp1_ll_read_stream (ULONGEST stream,
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int len,
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int set_last_bit);
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static void jp1_ll_write_stream (ULONGEST stream,
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int len,
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int set_last_bit);
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static void jp1_ll_prepare_control ();
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static void jp1_ll_prepare_data ();
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/* Forward declarations of low level support functions for remote OR1K remote
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JTAG server. */
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static int jtr_ll_connect (char *hostname,
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char *port_or_service);
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static void jtr_ll_close ();
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static enum or1k_jtag_errors jtr_ll_check (enum or1k_jtag_errors result);
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static enum or1k_jtag_errors jtr_ll_read (int fd,
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void *buf,
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int len);
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static enum or1k_jtag_errors jtr_ll_write (int fd,
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void *buf,
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int len);
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static enum or1k_jtag_errors jtr_ll_response (int fd,
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void *resp_buf,
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int len);
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/* Forward declarations for OR1K JTAG protocol functions for use with a local
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JP1 connection. */
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static enum or1k_jtag_errors jp1_read_jtag_reg (unsigned int regnum,
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ULONGEST *data);
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static enum or1k_jtag_errors jp1_write_jtag_reg (unsigned int regnum,
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ULONGEST data);
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static enum or1k_jtag_errors jp1_read_jtag_block (unsigned int regnum,
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uint32_t *bdata,
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int count);
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static enum or1k_jtag_errors jp1_write_jtag_block (unsigned int regnum,
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const uint32_t *bdata,
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int count);
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static enum or1k_jtag_errors jp1_select_chain (int chain);
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/* Forward declarations for OR1K JTAG protocol functions for use with a remote
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JTAG server. */
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static enum or1k_jtag_errors jtr_read_jtag_reg (unsigned int regnum,
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ULONGEST *data);
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static enum or1k_jtag_errors jtr_write_jtag_reg (unsigned long int regnum,
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ULONGEST data);
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static enum or1k_jtag_errors jtr_read_jtag_block (CORE_ADDR regnum,
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uint32_t *bdata,
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int count);
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static enum or1k_jtag_errors jtr_write_jtag_block (CORE_ADDR regnum,
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const uint32_t *bdata,
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int count);
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static enum or1k_jtag_errors jtr_select_chain (int chain);
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/* Forward declarations for OR1K JTAG protocol functions for use with either a
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local connection or remote server */
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static void or1k_jtag_read_jtag_reg (unsigned int regnum,
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ULONGEST *data);
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static void or1k_jtag_write_jtag_reg (unsigned int regnum,
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ULONGEST data);
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static void or1k_jtag_read_jtag_block (unsigned int regnum,
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uint32_t *bdata,
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int count);
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static void or1k_jtag_write_jtag_block (unsigned int regnum,
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const uint32_t *bdata,
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int count);
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static void or1k_jtag_select_chain (int chain);
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static void or1k_jtag_reset ();
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static const char *or1k_jtag_err_name (enum or1k_jtag_errors e);
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/* These are the low level OpenRISC 1000 JTAG Protocol functions for use with
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a local JTAG connection. All these functions are static and have the prefix
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jp1_ll_ */
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/*----------------------------------------------------------------------------*/
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/*!Generates new crc, sending in new bit input_bit
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@note Only actually calculates anything if the CRC size is 8.
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@param[in] crc Current CRC
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@param[in] input_bit New bit to incorporate
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@return New CRC */
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/*---------------------------------------------------------------------------*/
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static int
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jp1_ll_crc_calc (int crc,
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int input_bit)
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{
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int c;
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int new_crc;
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int d;
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279 |
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#if (JP1_CRC_SIZE == 8)
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d = input_bit&1;
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c = crc;
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/* Move queue left. */
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new_crc = crc << 1;
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/* Mask upper five bits. */
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new_crc &= 0xF8;
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/* Set lower three bits */
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new_crc |= (d ^ ((c >> 7) & 1));
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new_crc |= (d ^ ((c >> 0) & 1) ^ ((c >> 7) & 1)) << 1;
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new_crc |= (d ^ ((c >> 1) & 1) ^ ((c >> 7) & 1)) << 2;
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return new_crc;
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#else
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return 0;
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#endif
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}
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299 |
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300 |
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301 |
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/*----------------------------------------------------------------------------*/
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302 |
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/*!Resets the local JTAG via JP1
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304 |
131 |
jeremybenn |
Only works if this is a local connection. The old code used to ignore the
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write function results, but that upsets some particularly picky Ubuntu GCC
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compilers, so we get the result and do nothing with it.
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24 |
jeremybenn |
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308 |
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Writes:
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309 |
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@verbatim
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TCK=0 TRST=0 TMS=0 TDI=0
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TCK=0 TRST=1 TMS=0 TDI=0
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@endverbatim
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JTAG reset is active low */
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/*---------------------------------------------------------------------------*/
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static void
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jp1_ll_reset_jp1()
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{
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unsigned char data;
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321 |
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int lp = or1k_jtag_connection.device.lp; /* CZ */
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322 |
131 |
jeremybenn |
ssize_t res; /* So don't ignore results */
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323 |
24 |
jeremybenn |
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324 |
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if (OR1K_JTAG_LOCAL != or1k_jtag_connection.location)
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{
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error ("jp1_ll_reset_jp1 called without a local connection!");
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}
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data = 0;
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330 |
131 |
jeremybenn |
res = write (lp, &data, sizeof (data));
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331 |
24 |
jeremybenn |
JP1_WAIT ();
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332 |
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333 |
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data = JP1_TRST;
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334 |
131 |
jeremybenn |
res = write (lp, &data, sizeof (data) );
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335 |
24 |
jeremybenn |
JP1_WAIT ();
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336 |
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337 |
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} /* jp1_ll_reset_jp1() */
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338 |
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339 |
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340 |
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/*----------------------------------------------------------------------------*/
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341 |
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/*!Gets TD0 from JP1
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342 |
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343 |
|
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This is done using ioctl().
|
344 |
|
|
|
345 |
|
|
Rewritten by Jeremy Bennett to work whatever the TMS and TDI bit positions
|
346 |
|
|
in JP1.
|
347 |
|
|
|
348 |
|
|
@todo I really do not believe this can work. ioctl() expects a FD
|
349 |
|
|
(presumably or1k_jtag_connection.device.lp). A read() call would be the
|
350 |
|
|
more usual way to actually obtain data, given the data is set using
|
351 |
|
|
a write() call.
|
352 |
|
|
|
353 |
|
|
Writes:
|
354 |
|
|
@verbatim
|
355 |
|
|
TCK=0 TRST=1 TMS=bit0 TDI=bit1
|
356 |
|
|
TCK=1 TRST=1 TMS=bit0 TDI=bit1
|
357 |
|
|
@endverbatim
|
358 |
|
|
|
359 |
|
|
@return Bit 0 is the value of TD0. */
|
360 |
|
|
/*---------------------------------------------------------------------------*/
|
361 |
|
|
|
362 |
|
|
static unsigned char
|
363 |
|
|
jp1_ll_read_jp1()
|
364 |
|
|
{
|
365 |
146 |
jeremybenn |
int data = 0; /* Initialize for picky compilers */
|
366 |
24 |
jeremybenn |
|
367 |
|
|
if (OR1K_JTAG_LOCAL != or1k_jtag_connection.location)
|
368 |
|
|
{ /* CZ */
|
369 |
|
|
error ("jp1_ll_read_jp1 called without a local connection!");
|
370 |
|
|
}
|
371 |
|
|
|
372 |
|
|
ioctl (data, 0x60b, &data); /* Really!!!!! */
|
373 |
|
|
data = ((data & JP1_TDO) != 0);
|
374 |
|
|
|
375 |
|
|
/* Update the CRC for read */
|
376 |
|
|
jp1_crc_r = jp1_ll_crc_calc (jp1_crc_r, data);
|
377 |
|
|
return data;
|
378 |
|
|
|
379 |
|
|
} /* jp1_ll_read_jp1() */
|
380 |
|
|
|
381 |
|
|
|
382 |
|
|
/*----------------------------------------------------------------------------*/
|
383 |
|
|
/*!Clocks a bit into the local JTAG via JP1
|
384 |
|
|
|
385 |
|
|
Takes TMS and TDI values from the bottom two bits of the argument
|
386 |
|
|
|
387 |
|
|
Rewritten by Jeremy Bennett to work whatever the TMS and TDI bit positions
|
388 |
|
|
in JP1.
|
389 |
|
|
|
390 |
131 |
jeremybenn |
The old code used to ignore the write function results, but that upsets
|
391 |
|
|
some particularly picky Ubuntu GCC compilers, so we get the result and do
|
392 |
|
|
nothing with it.
|
393 |
|
|
|
394 |
24 |
jeremybenn |
Writes:
|
395 |
|
|
@verbatim
|
396 |
|
|
TCK=0 TRST=1 TMS=tms TDI=tdi
|
397 |
|
|
TCK=1 TRST=1 TMS=tms TDI=tdi
|
398 |
|
|
@endverbatim
|
399 |
|
|
|
400 |
|
|
@param[in] tms The JTAG TMS pin to be clocked in
|
401 |
|
|
@param[in] tdi The JTAG TDI pin to be clocked in */
|
402 |
|
|
/*---------------------------------------------------------------------------*/
|
403 |
|
|
|
404 |
|
|
static void
|
405 |
|
|
jp1_ll_write_jp1 (unsigned char tms,
|
406 |
|
|
unsigned char tdi)
|
407 |
|
|
{
|
408 |
|
|
unsigned char data;
|
409 |
|
|
int lp = or1k_jtag_connection.device.lp; /* CZ */
|
410 |
131 |
jeremybenn |
ssize_t res; /* So don't ignore results */
|
411 |
24 |
jeremybenn |
|
412 |
|
|
if (OR1K_JTAG_LOCAL != or1k_jtag_connection.location)
|
413 |
|
|
{
|
414 |
|
|
error ("jp1_ll_write_jp1 called without a local connection!");
|
415 |
|
|
}
|
416 |
|
|
|
417 |
|
|
data = (tms ? JP1_TDI : 0) |
|
418 |
|
|
(tdi ? JP1_TMS : 0) |
|
419 |
|
|
JP1_TRST;
|
420 |
131 |
jeremybenn |
res = write (lp, &data, sizeof (data) );
|
421 |
24 |
jeremybenn |
JP1_WAIT ();
|
422 |
|
|
|
423 |
|
|
/* rise clock */
|
424 |
|
|
data |= JP1_TCK;
|
425 |
131 |
jeremybenn |
res = write (lp, &data, sizeof (data) );
|
426 |
24 |
jeremybenn |
JP1_WAIT ();
|
427 |
|
|
|
428 |
|
|
/* Update the CRC for this TDI bit */
|
429 |
|
|
jp1_crc_w = jp1_ll_crc_calc (jp1_crc_w, tdi ? 1 : 0);
|
430 |
|
|
|
431 |
|
|
} /* jp1_write_jtag() */
|
432 |
|
|
|
433 |
|
|
|
434 |
|
|
/*----------------------------------------------------------------------------*/
|
435 |
|
|
/*!Read a stream of bits from TDO whilst also writing TDI and optionally TMS
|
436 |
|
|
|
437 |
|
|
Reads a bitstream of 1 or more bits from TDO, MS bit first whilst writing
|
438 |
|
|
a bitstream of the same length LS bit first. Optionally (if
|
439 |
|
|
set_last_bit is 1) writes the MS bit with TMS also set.
|
440 |
|
|
|
441 |
|
|
@todo The expression precedence in the original setting of TMS bit seemed
|
442 |
|
|
in error (due to a misunderstanding of the relative precedence of +
|
443 |
|
|
and <<. The changed expression should be correct, but needs testing.
|
444 |
|
|
|
445 |
|
|
@note If len is > sizeof (ULONGEST), then then only 0's are written for
|
446 |
|
|
all except the MS sizeof (ULONGEST) bits of stream.
|
447 |
|
|
|
448 |
|
|
@param[in] stream string of bits to write to TDI
|
449 |
|
|
@param[in] len number of bits to write
|
450 |
|
|
@param[in] set_last_bit if true also set TMS bit with last TDI bit.
|
451 |
|
|
|
452 |
|
|
@return Bitstream read MS bit first from TDO. */
|
453 |
|
|
/*---------------------------------------------------------------------------*/
|
454 |
|
|
|
455 |
|
|
static ULONGEST
|
456 |
|
|
jp1_ll_read_stream (ULONGEST stream,
|
457 |
|
|
int len,
|
458 |
|
|
int set_last_bit)
|
459 |
|
|
{
|
460 |
|
|
int i;
|
461 |
|
|
ULONGEST data = 0; /* The resulting stream */
|
462 |
|
|
|
463 |
|
|
/* Do nothing unless len is positive */
|
464 |
|
|
if (len <= 0)
|
465 |
|
|
{
|
466 |
|
|
return (ULONGEST)0;
|
467 |
|
|
}
|
468 |
|
|
|
469 |
|
|
/* Read all but last bit MS bit first while writing stream LS bit first */
|
470 |
|
|
for (i = 0; i < len-1; i++)
|
471 |
|
|
{
|
472 |
|
|
jp1_ll_write_jp1 (0, stream & 1);
|
473 |
|
|
stream >>= 1;
|
474 |
|
|
data <<= 1;
|
475 |
|
|
data |= jp1_ll_read_jp1 ();
|
476 |
|
|
}
|
477 |
|
|
|
478 |
|
|
/* Last bit optionally sets TMS as well */
|
479 |
|
|
jp1_ll_write_jp1 (set_last_bit, stream & 1);
|
480 |
|
|
data <<= 1;
|
481 |
|
|
data |= jp1_ll_read_jp1 ();
|
482 |
|
|
|
483 |
|
|
return data;
|
484 |
|
|
|
485 |
|
|
} /* jp1_ll_read_stream() */
|
486 |
|
|
|
487 |
|
|
|
488 |
|
|
/*----------------------------------------------------------------------------*/
|
489 |
|
|
/*!Write a stream of bits to TDI and optionally TMS
|
490 |
|
|
|
491 |
|
|
Writes bitstream of 1 or more bits to TDI, MS bit first. Optionally (if
|
492 |
|
|
set_last_bit is 1) writes the last bit with TMS also set.
|
493 |
|
|
|
494 |
|
|
@note If len is > sizeof (ULONGEST), then then only 0's are written for
|
495 |
|
|
all the bits > sizeof (ULONGEST)
|
496 |
|
|
|
497 |
|
|
@param[in] stream string of bits to write to TDI
|
498 |
|
|
@param[in] len number of bits to write
|
499 |
|
|
@param[in] set_last_bit if true also set TMS bit with last TDI bit. */
|
500 |
|
|
/*---------------------------------------------------------------------------*/
|
501 |
|
|
|
502 |
|
|
static void
|
503 |
|
|
jp1_ll_write_stream (ULONGEST stream,
|
504 |
|
|
int len,
|
505 |
|
|
int set_last_bit)
|
506 |
|
|
{
|
507 |
|
|
int i;
|
508 |
|
|
|
509 |
|
|
/* Do nothing if len is not positive */
|
510 |
|
|
if (len <= 0)
|
511 |
|
|
{
|
512 |
|
|
return;
|
513 |
|
|
}
|
514 |
|
|
|
515 |
|
|
/* All but last bit to TDI only */
|
516 |
|
|
for (i = len - 1; i > 0; i--)
|
517 |
|
|
{
|
518 |
|
|
jp1_ll_write_jp1 (0, (stream >> i) & 1);
|
519 |
|
|
}
|
520 |
|
|
|
521 |
|
|
/* Last bit optionally sets TMS as well */
|
522 |
|
|
jp1_ll_write_jp1 (set_last_bit, stream & 1);
|
523 |
|
|
|
524 |
|
|
} /* jp1_ll_write_stream() */
|
525 |
|
|
|
526 |
|
|
|
527 |
|
|
/*----------------------------------------------------------------------------*/
|
528 |
|
|
/*!Force JTAG SELECT_IR state
|
529 |
|
|
|
530 |
|
|
Should be called before every control write.
|
531 |
|
|
|
532 |
|
|
If we are not in SELECT_DR, we must be in RUN TEST/IDLE, so step the state
|
533 |
|
|
to SELECT_DR. One more step takes us to SELECT_IR. Set the or1k_select_dr
|
534 |
|
|
flag to false. */
|
535 |
|
|
/*---------------------------------------------------------------------------*/
|
536 |
|
|
|
537 |
|
|
static void
|
538 |
|
|
jp1_ll_prepare_control()
|
539 |
|
|
{
|
540 |
|
|
if (!or1k_select_dr)
|
541 |
|
|
{
|
542 |
|
|
jp1_ll_write_jp1 (1, 0); /* SELECT_DR SCAN */
|
543 |
|
|
}
|
544 |
|
|
|
545 |
|
|
jp1_ll_write_jp1 (1, 0); /* SELECT_IR SCAN */
|
546 |
|
|
or1k_select_dr = 0;
|
547 |
|
|
|
548 |
|
|
} /* jp1_ll_prepare_control() */
|
549 |
|
|
|
550 |
|
|
|
551 |
|
|
/*----------------------------------------------------------------------------*/
|
552 |
|
|
/*!Force JTAG SELECT_DR state
|
553 |
|
|
|
554 |
|
|
If we are not in SELECT_DR, we must be in RUN TEST/IDLE, so step the state
|
555 |
|
|
to SELECT_DR. */
|
556 |
|
|
/*---------------------------------------------------------------------------*/
|
557 |
|
|
|
558 |
|
|
static void
|
559 |
|
|
jp1_ll_prepare_data()
|
560 |
|
|
{
|
561 |
|
|
if (!or1k_select_dr)
|
562 |
|
|
{
|
563 |
|
|
jp1_ll_write_jp1 (0, 1); /* SELECT_DR SCAN */
|
564 |
|
|
}
|
565 |
|
|
|
566 |
|
|
or1k_select_dr = 1;
|
567 |
|
|
|
568 |
|
|
} /* jp1_ll_prepare_data() */
|
569 |
|
|
|
570 |
|
|
|
571 |
|
|
|
572 |
|
|
/* These are the low level OpenRISC 1000 JTAG Protocol functions for use with
|
573 |
|
|
a remote JTAG server. All these functions are static and have the prefix
|
574 |
|
|
jtr_ll_ */
|
575 |
|
|
|
576 |
|
|
/*----------------------------------------------------------------------------*/
|
577 |
|
|
/*!Connect to a remote OpenRISC 1000 JTAG server.
|
578 |
|
|
|
579 |
|
|
Added by CZ 24/05/01
|
580 |
|
|
|
581 |
|
|
Makes the connection as a socket and returns the file descriptor for the
|
582 |
|
|
socket.
|
583 |
|
|
|
584 |
|
|
@param[in] hostname The host to connect to
|
585 |
|
|
@param[in] port_or_service Port or service to connect to
|
586 |
|
|
|
587 |
|
|
@return A file descriptor for the new socket or 0 on error. */
|
588 |
|
|
/*---------------------------------------------------------------------------*/
|
589 |
|
|
|
590 |
|
|
static int
|
591 |
|
|
jtr_ll_connect (char *hostname,
|
592 |
|
|
char *port_or_service)
|
593 |
|
|
{
|
594 |
|
|
struct hostent *host;
|
595 |
|
|
struct sockaddr_in sin;
|
596 |
|
|
struct servent *service;
|
597 |
|
|
struct protoent *protocol;
|
598 |
|
|
|
599 |
|
|
int sock;
|
600 |
|
|
long int flags;
|
601 |
|
|
|
602 |
|
|
char *endptr;
|
603 |
|
|
|
604 |
|
|
const char *proto_name = "tcp";
|
605 |
|
|
|
606 |
|
|
int port = 0;
|
607 |
|
|
int on_off = 0; /* Turn off Nagel's algorithm on the socket */
|
608 |
|
|
|
609 |
|
|
protocol = getprotobyname (proto_name);
|
610 |
|
|
if (NULL == protocol)
|
611 |
|
|
{
|
612 |
|
|
error ("jtr_ll_connect: Protocol \"%s\" not available.\n",
|
613 |
|
|
proto_name);
|
614 |
|
|
return 0;
|
615 |
|
|
}
|
616 |
|
|
|
617 |
|
|
/* Convert port_or_service to an integer only if it is a well formatted
|
618 |
|
|
decimal number (i.e. the end pointer is the null char at the end of the
|
619 |
|
|
string. Otherwise, assume that it is a service name. */
|
620 |
|
|
|
621 |
|
|
port = strtol (port_or_service, &endptr, 10);
|
622 |
|
|
if ('\0' != endptr[0])
|
623 |
|
|
{
|
624 |
|
|
port = 0;
|
625 |
|
|
|
626 |
|
|
/* Not a port, see if its a service */
|
627 |
|
|
service = getservbyname (port_or_service, protocol->p_name);
|
628 |
|
|
if (NULL == service)
|
629 |
|
|
{
|
630 |
|
|
error ("jtr_ll_connect: Unknown service \"%s\".\n",
|
631 |
|
|
port_or_service);
|
632 |
|
|
return 0;
|
633 |
|
|
}
|
634 |
|
|
else
|
635 |
|
|
{
|
636 |
|
|
port = ntohs (service->s_port);
|
637 |
|
|
}
|
638 |
|
|
}
|
639 |
|
|
|
640 |
|
|
/* Try to find the host */
|
641 |
|
|
host = gethostbyname (hostname);
|
642 |
|
|
if (NULL == host)
|
643 |
|
|
{
|
644 |
|
|
error ("jtr_ll_connect: Unknown host \"%s\"\n", hostname);
|
645 |
|
|
return 0;
|
646 |
|
|
}
|
647 |
|
|
|
648 |
|
|
/* Open a socket using IP4 stream (i.e. TCP/IP) connection and make it
|
649 |
|
|
blocking. */
|
650 |
|
|
sock = socket (PF_INET, SOCK_STREAM, 0);
|
651 |
|
|
if (sock < 0)
|
652 |
|
|
{
|
653 |
|
|
error ("jtr_ll_connect: can't create socket, errno = %d (%s)\n",
|
654 |
|
|
errno ,strerror (errno) );
|
655 |
|
|
return 0;
|
656 |
|
|
}
|
657 |
|
|
|
658 |
|
|
flags = fcntl (sock, F_GETFL, 0);
|
659 |
|
|
if (flags < 0)
|
660 |
|
|
{
|
661 |
|
|
error ("jtr_ll_connect: can't get flags, errno = %d (%s)\n",
|
662 |
|
|
errno, strerror (errno) );
|
663 |
|
|
close (sock);
|
664 |
|
|
return 0;
|
665 |
|
|
}
|
666 |
|
|
|
667 |
|
|
flags &= ~O_NONBLOCK;
|
668 |
|
|
if (fcntl (sock, F_SETFL, flags) < 0)
|
669 |
|
|
{
|
670 |
|
|
error ("jtr_ll_connect: can't set flags %lx, errno = %d (%s)\n",
|
671 |
|
|
flags, errno, strerror (errno) );
|
672 |
|
|
close (sock);
|
673 |
|
|
return 0;
|
674 |
|
|
}
|
675 |
|
|
|
676 |
|
|
/* Try to open a connection to the remote end */
|
677 |
|
|
memset (&sin, 0, sizeof (sin) );
|
678 |
|
|
sin.sin_family = host->h_addrtype;
|
679 |
|
|
sin.sin_port = htons (port);
|
680 |
|
|
memcpy (&sin.sin_addr, host->h_addr_list[0], host->h_length);
|
681 |
|
|
|
682 |
|
|
/* Old version of this allowed EINPROGRESS, but did nothing about following
|
683 |
|
|
it up and in any case, that should not be possible with a blocking
|
684 |
|
|
connection. */
|
685 |
|
|
if (connect (sock, (struct sockaddr *)&sin, sizeof (sin) ) < 0)
|
686 |
|
|
{
|
687 |
|
|
error ("jtr_ll_connect: connect failed errno = %d (%s)\n",
|
688 |
|
|
errno, strerror (errno) );
|
689 |
|
|
close (sock);
|
690 |
|
|
return 0;
|
691 |
|
|
}
|
692 |
|
|
|
693 |
|
|
/* Turn the socket back to non-blocking */
|
694 |
|
|
flags |= O_NONBLOCK;
|
695 |
|
|
if (fcntl (sock, F_SETFL, flags) < 0)
|
696 |
|
|
{
|
697 |
|
|
error ("jtr_ll_connect: can't set flags %lx, errno = %d (%s)\n",
|
698 |
|
|
flags, errno, strerror (errno) );
|
699 |
|
|
close (sock);
|
700 |
|
|
return 0;
|
701 |
|
|
}
|
702 |
|
|
|
703 |
|
|
/* Turn off Nagle's algorithm, i.e. send data immediately, don't bottle it
|
704 |
|
|
up into useful sized chunks. */
|
705 |
|
|
if (setsockopt (sock, protocol->p_proto, TCP_NODELAY, &on_off,
|
706 |
|
|
sizeof(int)) < 0)
|
707 |
|
|
{
|
708 |
|
|
error ("jtr_ll_connect: "
|
709 |
|
|
"can't disable Nagel's algorithm, errno %d (%s)\n", errno,
|
710 |
|
|
strerror (errno) );
|
711 |
|
|
close(sock);
|
712 |
|
|
return 0;
|
713 |
|
|
}
|
714 |
|
|
|
715 |
|
|
return sock;
|
716 |
|
|
|
717 |
|
|
} /* jtr_ll_connect() */
|
718 |
|
|
|
719 |
|
|
|
720 |
|
|
/*----------------------------------------------------------------------------*/
|
721 |
|
|
/*!Close down an OpenRISC 1000 JTAG remote connection
|
722 |
|
|
|
723 |
|
|
Closes the connection without waiting for any queued messages on the
|
724 |
|
|
socket.
|
725 |
|
|
|
726 |
|
|
In this version the remote socket FD is always used and the result is
|
727 |
|
|
discarded, since it is never used by the calling function. */
|
728 |
|
|
/*---------------------------------------------------------------------------*/
|
729 |
|
|
|
730 |
|
|
static void
|
731 |
|
|
jtr_ll_close()
|
732 |
|
|
{
|
733 |
|
|
int flags;
|
734 |
|
|
struct linger linger;
|
735 |
|
|
|
736 |
|
|
/* First, make sure we're non blocking */
|
737 |
|
|
flags = fcntl (or1k_jtag_connection.device.fd, F_GETFL, 0);
|
738 |
|
|
if (flags < 0)
|
739 |
|
|
{
|
740 |
|
|
error ("jtr_ll_close: can't get flags errno %d (%s)\n",
|
741 |
|
|
errno, strerror (errno) );
|
742 |
|
|
}
|
743 |
|
|
|
744 |
|
|
flags &= ~O_NONBLOCK;
|
745 |
|
|
if (fcntl (or1k_jtag_connection.device.fd, F_SETFL, flags) < 0)
|
746 |
|
|
{
|
747 |
|
|
error ("jtr_ll_close: can't set flags to 0x%x, errno %d (%s)\n",
|
748 |
|
|
flags, errno, strerror (errno) );
|
749 |
|
|
}
|
750 |
|
|
|
751 |
|
|
/* Now, make sure we don't linger around */
|
752 |
|
|
linger.l_onoff = 0;
|
753 |
|
|
linger.l_linger = 0;
|
754 |
|
|
|
755 |
|
|
if (setsockopt (or1k_jtag_connection.device.fd, SOL_SOCKET, SO_LINGER,
|
756 |
|
|
&linger, sizeof (linger) ) < 0)
|
757 |
|
|
{
|
758 |
|
|
error ("jtr_ll_close: can't disable SO_LINGER, errno %d (%s)",
|
759 |
|
|
errno, strerror (errno) );
|
760 |
|
|
}
|
761 |
|
|
|
762 |
|
|
(void)close (or1k_jtag_connection.device.fd);
|
763 |
|
|
|
764 |
|
|
or1k_jtag_connection.device.fd = 0;
|
765 |
|
|
or1k_jtag_connection.location = OR1K_JTAG_NOT_CONNECTED;
|
766 |
|
|
|
767 |
|
|
} /* jtr_ll_close() */
|
768 |
|
|
|
769 |
|
|
|
770 |
|
|
/*----------------------------------------------------------------------------*/
|
771 |
|
|
/*!Close down a remote connection if the server has terminated
|
772 |
|
|
|
773 |
|
|
Utility function which closes the remote connection if the error result
|
774 |
|
|
OR1K_JTAG_ERR_SERVER_TERMINATED has been received.
|
775 |
|
|
|
776 |
|
|
@param[in] result Result code to check
|
777 |
|
|
|
778 |
|
|
@return The result passed as argument (for convenience) */
|
779 |
|
|
/*---------------------------------------------------------------------------*/
|
780 |
|
|
|
781 |
|
|
static enum or1k_jtag_errors
|
782 |
|
|
jtr_ll_check (enum or1k_jtag_errors result)
|
783 |
|
|
{
|
784 |
|
|
if (OR1K_JTAG_ERR_SERVER_TERMINATED == result)
|
785 |
|
|
{
|
786 |
|
|
jtr_ll_close ();
|
787 |
|
|
}
|
788 |
|
|
|
789 |
|
|
return result;
|
790 |
|
|
} /* jtr_ll_check() */
|
791 |
|
|
|
792 |
|
|
|
793 |
|
|
/*----------------------------------------------------------------------------*/
|
794 |
|
|
/*!Read from a remote OpenRISC 1000 JTAG connection
|
795 |
|
|
|
796 |
|
|
Added by CZ 24/05/01. Modified by Jeremy Bennett.
|
797 |
|
|
|
798 |
|
|
The read should always be blocking, so if we get a result indicating a
|
799 |
|
|
non-blocking FD, we simulate the blocking behavior using poll(). May take
|
800 |
|
|
several reads to get the whole buffer in.
|
801 |
|
|
|
802 |
|
|
@param[in] fd File descriptor for remote connection
|
803 |
|
|
@param[out] buf Buffer for data that is read
|
804 |
|
|
@param[in] len Number of bytes to read
|
805 |
|
|
|
806 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
807 |
|
|
/*---------------------------------------------------------------------------*/
|
808 |
|
|
|
809 |
|
|
static enum or1k_jtag_errors
|
810 |
|
|
jtr_ll_read (int fd,
|
811 |
|
|
void *buf,
|
812 |
|
|
int len)
|
813 |
|
|
{
|
814 |
|
|
char* r_buf = (char*)buf;
|
815 |
|
|
|
816 |
|
|
while (len > 0)
|
817 |
|
|
{
|
818 |
|
|
int n = read (fd, r_buf, len);
|
819 |
|
|
|
820 |
|
|
if (n < 0)
|
821 |
|
|
{
|
822 |
|
|
struct pollfd block;
|
823 |
|
|
|
824 |
|
|
switch(errno)
|
825 |
|
|
{
|
826 |
|
|
case EWOULDBLOCK: /* or EAGAIN */
|
827 |
|
|
/* We've been called on a descriptor marked for nonblocking
|
828 |
|
|
I/O. We'd better simulate blocking behavior. */
|
829 |
|
|
block.fd = fd;
|
830 |
|
|
block.events = POLLIN;
|
831 |
|
|
block.revents = 0;
|
832 |
|
|
|
833 |
|
|
poll(&block,1,-1);
|
834 |
|
|
continue;
|
835 |
|
|
|
836 |
|
|
case EINTR: continue;
|
837 |
|
|
default: return errno;
|
838 |
|
|
}
|
839 |
|
|
}
|
840 |
|
|
else if (0 == n)
|
841 |
|
|
{
|
842 |
|
|
/* Zero indicates EOF. */
|
843 |
|
|
return OR1K_JTAG_ERR_SERVER_TERMINATED;
|
844 |
|
|
}
|
845 |
|
|
else
|
846 |
|
|
{
|
847 |
|
|
len -= n;
|
848 |
|
|
r_buf += n;
|
849 |
|
|
}
|
850 |
|
|
}
|
851 |
|
|
|
852 |
|
|
return OR1K_JTAG_ERR_NONE;
|
853 |
|
|
|
854 |
|
|
} /* jtr_ll_read() */
|
855 |
|
|
|
856 |
|
|
|
857 |
|
|
/*----------------------------------------------------------------------------*/
|
858 |
|
|
/*!Write to a remote OpenRISC 1000 JTAG connection
|
859 |
|
|
|
860 |
|
|
Added by CZ 24/05/01. Modified by Jeremy Bennett.
|
861 |
|
|
|
862 |
|
|
The write should always be blocking, so if we get a result indicating a
|
863 |
|
|
non-blocking FD, we simulate the blocking behavior using poll(). May take
|
864 |
|
|
several writes to get the whole buffer out.
|
865 |
|
|
|
866 |
|
|
@param[in] fd File descriptor for remote connection
|
867 |
|
|
@param[in] buf Buffer of data to be written
|
868 |
|
|
@param[in] len Number of bytes to write
|
869 |
|
|
|
870 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
871 |
|
|
/*---------------------------------------------------------------------------*/
|
872 |
|
|
|
873 |
|
|
static enum or1k_jtag_errors
|
874 |
|
|
jtr_ll_write (int fd,
|
875 |
|
|
void *buf,
|
876 |
|
|
int len)
|
877 |
|
|
{
|
878 |
|
|
char *w_buf = (char*)buf; /* Pointer to buffer left to write */
|
879 |
|
|
|
880 |
|
|
while (len > 0)
|
881 |
|
|
{
|
882 |
|
|
int n = write (fd, w_buf, len);
|
883 |
|
|
|
884 |
|
|
if (n < 0)
|
885 |
|
|
{
|
886 |
|
|
struct pollfd block;
|
887 |
|
|
|
888 |
|
|
switch (errno)
|
889 |
|
|
{
|
890 |
|
|
case EWOULDBLOCK: /* or EAGAIN */
|
891 |
|
|
/* We've been called on a descriptor marked for nonblocking
|
892 |
|
|
I/O. We'd better simulate blocking behavior. */
|
893 |
|
|
block.fd = fd;
|
894 |
|
|
block.events = POLLOUT;
|
895 |
|
|
block.revents = 0;
|
896 |
|
|
|
897 |
|
|
poll (&block, 1, -1); /* Wait forever for output */
|
898 |
|
|
continue;
|
899 |
|
|
|
900 |
|
|
case EINTR: continue;
|
901 |
|
|
case EPIPE: return OR1K_JTAG_ERR_SERVER_TERMINATED;
|
902 |
|
|
default: return errno;
|
903 |
|
|
}
|
904 |
|
|
}
|
905 |
|
|
else
|
906 |
|
|
{
|
907 |
|
|
len -= n;
|
908 |
|
|
w_buf += n;
|
909 |
|
|
}
|
910 |
|
|
}
|
911 |
|
|
|
912 |
|
|
return OR1K_JTAG_ERR_NONE;
|
913 |
|
|
|
914 |
|
|
} /* jtr_ll_write() */
|
915 |
|
|
|
916 |
|
|
|
917 |
|
|
/*----------------------------------------------------------------------------*/
|
918 |
|
|
/*!Fetch a remote OpenRISC 1000 JTAG response
|
919 |
|
|
|
920 |
|
|
All OR1K reponse structs start with a uint32_t status field. If a response
|
921 |
|
|
is an error response this is all that is set.
|
922 |
|
|
|
923 |
|
|
If the response is not an error, then there may be further bytes to
|
924 |
|
|
get. The total number to get is gives by len.
|
925 |
|
|
|
926 |
|
|
All data in the response is in raw network format. A bug has been fixed
|
927 |
|
|
which converted the status to host format in the buffer (that should be
|
928 |
|
|
done by the caller).
|
929 |
|
|
|
930 |
|
|
All errors are not logged using the GDB logging function, not just plain
|
931 |
|
|
printf.
|
932 |
|
|
|
933 |
|
|
@param[in] fd File descriptor for remote connection
|
934 |
|
|
@param[out] resp_buf Buffer for the response
|
935 |
|
|
@param[in] len Size of the response buffer in bytes if this is a
|
936 |
|
|
successful response.
|
937 |
|
|
|
938 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
939 |
|
|
/*---------------------------------------------------------------------------*/
|
940 |
|
|
|
941 |
|
|
static enum or1k_jtag_errors
|
942 |
|
|
jtr_ll_response (int fd,
|
943 |
|
|
void *resp_buf,
|
944 |
|
|
int len)
|
945 |
|
|
{
|
946 |
|
|
long int status;
|
947 |
|
|
enum or1k_jtag_errors result;
|
948 |
|
|
|
949 |
|
|
/* Get the status and blow out for any failure */
|
950 |
|
|
result = jtr_ll_read (fd, resp_buf, sizeof (status) );
|
951 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
952 |
|
|
{
|
953 |
|
|
return jtr_ll_check (result);
|
954 |
|
|
}
|
955 |
|
|
|
956 |
|
|
status = ((struct jtr_failure_response *)resp_buf)->status;
|
957 |
|
|
status = ntohl (status);
|
958 |
|
|
|
959 |
|
|
if (OR1K_JTAG_ERR_NONE != status)
|
960 |
|
|
{
|
961 |
|
|
return jtr_ll_check (status);
|
962 |
|
|
}
|
963 |
|
|
|
964 |
|
|
/* Get the rest of a good result. Note this works even if there is no more
|
965 |
|
|
to get (i.e. len=4) */
|
966 |
|
|
result = jtr_ll_read (fd, &(((char *)resp_buf)[sizeof (status) ]),
|
967 |
|
|
len - sizeof (status) );
|
968 |
|
|
return jtr_ll_check (result);
|
969 |
|
|
|
970 |
|
|
} /* jtr_ll_response() */
|
971 |
|
|
|
972 |
|
|
|
973 |
|
|
|
974 |
|
|
/* These are the OpenRISC 1000 JTAG Protocol routines for use with a local JP1
|
975 |
|
|
connection. They are built on tol of the remote protocol low level helper
|
976 |
|
|
functions. All these functions are static and have the prefix jp1_ */
|
977 |
|
|
|
978 |
|
|
|
979 |
|
|
/*----------------------------------------------------------------------------*/
|
980 |
|
|
/*!Read a JTAG register from a local JTAG connection.
|
981 |
|
|
|
982 |
|
|
What this does depends on which chain is selected. Drive the JTAG state
|
983 |
|
|
machine to read a value from a register
|
984 |
|
|
|
985 |
|
|
@param[in] regnum The JTAG register from which to read
|
986 |
|
|
@param[out] data Pointer for the returned value.
|
987 |
|
|
|
988 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
989 |
|
|
/*---------------------------------------------------------------------------*/
|
990 |
|
|
|
991 |
|
|
static enum or1k_jtag_errors
|
992 |
|
|
jp1_read_jtag_reg (unsigned int regnum,
|
993 |
|
|
ULONGEST *data)
|
994 |
|
|
{
|
995 |
|
|
int retry;
|
996 |
|
|
|
997 |
|
|
jp1_ll_prepare_data (); /* SELECT_DR SCAN */
|
998 |
|
|
|
999 |
|
|
for (retry = 0; retry < JP1_NUM_RETRIES; retry++)
|
1000 |
|
|
{
|
1001 |
|
|
int crc_read = 0;
|
1002 |
|
|
int crc_write = 0;
|
1003 |
|
|
int crc_actual_read = 0;
|
1004 |
|
|
int crc_ok = 0;
|
1005 |
|
|
|
1006 |
|
|
jp1_ll_write_jp1 (0, 0); /* CAPTURE_DR */
|
1007 |
|
|
jp1_ll_write_jp1 (0, 0); /* SHIFT_DR */
|
1008 |
|
|
jp1_crc_w = 0;
|
1009 |
|
|
|
1010 |
|
|
/* write regnum */
|
1011 |
|
|
jp1_ll_write_stream((ULONGEST)regnum,
|
1012 |
|
|
jp1_chain_addr_size[or1k_jtag_current_chain], 0);
|
1013 |
|
|
|
1014 |
|
|
/* read (R/W=0) */
|
1015 |
|
|
if (jp1_chain_has_rw[or1k_jtag_current_chain])
|
1016 |
|
|
{
|
1017 |
|
|
jp1_ll_write_jp1 (0, 0);
|
1018 |
|
|
}
|
1019 |
|
|
|
1020 |
|
|
if (jp1_chain_has_crc[or1k_jtag_current_chain])
|
1021 |
|
|
{
|
1022 |
|
|
jp1_crc_r = 0;
|
1023 |
|
|
|
1024 |
|
|
/* *data = 0 */
|
1025 |
|
|
*data = jp1_ll_read_stream (0,
|
1026 |
|
|
jp1_chain_data_size[or1k_jtag_current_chain],
|
1027 |
|
|
0);
|
1028 |
|
|
crc_write = jp1_crc_w;
|
1029 |
|
|
crc_actual_read = crc_read;
|
1030 |
|
|
|
1031 |
|
|
/* Send my crc, EXIT1_DR */
|
1032 |
|
|
crc_read = (int)jp1_ll_read_stream (crc_write, JP1_CRC_SIZE, 1);
|
1033 |
|
|
}
|
1034 |
|
|
|
1035 |
|
|
jp1_ll_write_jp1 (1, 0); /* UPDATE_DR */
|
1036 |
|
|
|
1037 |
|
|
/* Did JTAG receive packet correctly? */
|
1038 |
|
|
if (jp1_chain_has_crc[or1k_jtag_current_chain])
|
1039 |
|
|
{
|
1040 |
|
|
crc_ok = jp1_ll_read_jp1 ();
|
1041 |
|
|
}
|
1042 |
|
|
|
1043 |
|
|
jp1_ll_write_jp1 (1, 0); /* SELECT_DR */
|
1044 |
|
|
if (jp1_chain_has_crc[or1k_jtag_current_chain])
|
1045 |
|
|
{
|
1046 |
|
|
if ((crc_read == crc_actual_read) && crc_ok)
|
1047 |
|
|
{
|
1048 |
|
|
return OR1K_JTAG_ERR_CRC; /* CZ */
|
1049 |
|
|
}
|
1050 |
|
|
JP1_RETRY_WAIT ();
|
1051 |
|
|
}
|
1052 |
|
|
else
|
1053 |
|
|
{
|
1054 |
|
|
return OR1K_JTAG_ERR_CRC; /* CZ */
|
1055 |
|
|
}
|
1056 |
|
|
}
|
1057 |
|
|
|
1058 |
|
|
return OR1K_JTAG_ERR_NONE;
|
1059 |
|
|
|
1060 |
|
|
} /* jp1_read_jtag_reg() */
|
1061 |
|
|
|
1062 |
|
|
|
1063 |
|
|
/*----------------------------------------------------------------------------*/
|
1064 |
|
|
/*!Write a JTAG register on a local JTAG connection.
|
1065 |
|
|
|
1066 |
|
|
What this does depends on which chain is selected. Drive the JTAG state
|
1067 |
|
|
machine to read a value from a register
|
1068 |
|
|
|
1069 |
|
|
@param[in] regnum The register to write to
|
1070 |
|
|
@param[in] data Data to write
|
1071 |
|
|
|
1072 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1073 |
|
|
/*---------------------------------------------------------------------------*/
|
1074 |
|
|
|
1075 |
|
|
static enum or1k_jtag_errors
|
1076 |
|
|
jp1_write_jtag_reg (unsigned int regnum,
|
1077 |
|
|
ULONGEST data)
|
1078 |
|
|
{
|
1079 |
|
|
int retry;
|
1080 |
|
|
|
1081 |
|
|
jp1_ll_prepare_data (); /* SELECT_DR SCAN */
|
1082 |
|
|
|
1083 |
|
|
/* If we don't have rw bit, we assume chain is read only. */
|
1084 |
|
|
if (!jp1_chain_has_rw[or1k_jtag_current_chain])
|
1085 |
|
|
{
|
1086 |
|
|
error ("or1k_jtag_write_reg: Chain not writable");
|
1087 |
|
|
}
|
1088 |
|
|
|
1089 |
|
|
for (retry = 0; retry < JP1_NUM_RETRIES; retry++)
|
1090 |
|
|
{
|
1091 |
|
|
int crc_read = 0;
|
1092 |
|
|
int crc_write = 0;
|
1093 |
|
|
int crc_ok = 0;
|
1094 |
|
|
|
1095 |
|
|
jp1_ll_write_jp1 (0, 0); /* CAPTURE_DR */
|
1096 |
|
|
jp1_ll_write_jp1 (0, 0); /* SHIFT_DR */
|
1097 |
|
|
jp1_crc_w = 0;
|
1098 |
|
|
|
1099 |
|
|
/* write regnum */
|
1100 |
|
|
jp1_ll_write_stream((ULONGEST)regnum,
|
1101 |
|
|
jp1_chain_addr_size[or1k_jtag_current_chain], 0);
|
1102 |
|
|
|
1103 |
|
|
/* write (R/W=1) - we tested that previously. */
|
1104 |
|
|
jp1_ll_write_jp1 (0, 1); /* TDI=1 */
|
1105 |
|
|
|
1106 |
|
|
/* write data */
|
1107 |
|
|
jp1_ll_write_stream (data, jp1_chain_data_size[or1k_jtag_current_chain],
|
1108 |
|
|
0);
|
1109 |
|
|
if (jp1_chain_has_crc[or1k_jtag_current_chain])
|
1110 |
|
|
{
|
1111 |
|
|
crc_write = jp1_crc_w;
|
1112 |
|
|
|
1113 |
|
|
/* write CRC, EXIT1_DR */
|
1114 |
|
|
crc_read = (int)jp1_ll_read_stream (crc_write, JP1_CRC_SIZE, 1);
|
1115 |
|
|
}
|
1116 |
|
|
|
1117 |
|
|
jp1_ll_write_jp1 (1, 0); /* UPDATE_DR */
|
1118 |
|
|
|
1119 |
|
|
/* Did JTAG receive packet correctly? */
|
1120 |
|
|
if (jp1_chain_has_crc[or1k_jtag_current_chain])
|
1121 |
|
|
{
|
1122 |
|
|
crc_ok = jp1_ll_read_jp1 ();
|
1123 |
|
|
}
|
1124 |
|
|
|
1125 |
|
|
jp1_ll_write_jp1 (1, 0); /* SELECT_DR */
|
1126 |
|
|
if (jp1_chain_has_crc[or1k_jtag_current_chain])
|
1127 |
|
|
{
|
1128 |
|
|
if ((crc_read == crc_write) && crc_ok)
|
1129 |
|
|
{
|
1130 |
|
|
return OR1K_JTAG_ERR_NONE;
|
1131 |
|
|
}
|
1132 |
|
|
JP1_RETRY_WAIT ();
|
1133 |
|
|
}
|
1134 |
|
|
else
|
1135 |
|
|
{
|
1136 |
|
|
return OR1K_JTAG_ERR_NONE;
|
1137 |
|
|
}
|
1138 |
|
|
}
|
1139 |
|
|
return OR1K_JTAG_ERR_CRC;
|
1140 |
|
|
|
1141 |
|
|
} /* jp1_write_jtag_reg() */
|
1142 |
|
|
|
1143 |
|
|
|
1144 |
|
|
|
1145 |
|
|
/*----------------------------------------------------------------------------*/
|
1146 |
|
|
/*!Process a local OpenRISC 1000 JTAG block read command
|
1147 |
|
|
|
1148 |
|
|
Process the JTAG state machine to read values from a block of
|
1149 |
|
|
registers/memory. Built on top of the local routine to read a single
|
1150 |
|
|
register.
|
1151 |
|
|
|
1152 |
|
|
If any of the individual reads fail, give up and return the error code of
|
1153 |
|
|
that failure. Otherwise return success.
|
1154 |
|
|
|
1155 |
|
|
@param[in] regnum The first register for the block from which to read
|
1156 |
|
|
@param[out] bdata Pointer to block for the returned values
|
1157 |
|
|
@param[out] count How many registers to read.
|
1158 |
|
|
|
1159 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1160 |
|
|
/*---------------------------------------------------------------------------*/
|
1161 |
|
|
|
1162 |
|
|
static enum or1k_jtag_errors
|
1163 |
|
|
jp1_read_jtag_block (unsigned int regnum,
|
1164 |
|
|
uint32_t *bdata,
|
1165 |
|
|
int count)
|
1166 |
|
|
{
|
1167 |
|
|
ULONGEST data;
|
1168 |
|
|
enum or1k_jtag_errors result;
|
1169 |
|
|
int i;
|
1170 |
|
|
|
1171 |
|
|
for (i=0; i < count; i++)
|
1172 |
|
|
{
|
1173 |
|
|
result = jp1_read_jtag_reg (regnum + i, &data);
|
1174 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1175 |
|
|
{
|
1176 |
|
|
return result;
|
1177 |
|
|
}
|
1178 |
|
|
|
1179 |
|
|
bdata[i] = (uint32_t)data;
|
1180 |
|
|
}
|
1181 |
|
|
|
1182 |
|
|
return OR1K_JTAG_ERR_NONE;
|
1183 |
|
|
|
1184 |
|
|
} /* jp1_read_jtag_block() */
|
1185 |
|
|
|
1186 |
|
|
|
1187 |
|
|
/*----------------------------------------------------------------------------*/
|
1188 |
|
|
/*!Process a local OpenRISC 1000 JTAG block write command
|
1189 |
|
|
|
1190 |
|
|
Process the JTAG state machine to write values to a block of
|
1191 |
|
|
registers/memory. Built on top of the local routine to write a single
|
1192 |
|
|
register.
|
1193 |
|
|
|
1194 |
|
|
If any of the individual writes fail, give up and return the error code of
|
1195 |
|
|
that failure. Otherwise return success.
|
1196 |
|
|
|
1197 |
|
|
@param[in] regnum The first register for the block to which to write
|
1198 |
|
|
@param[out] bdata Pointer to block for the values to write
|
1199 |
|
|
@param[out] count How many registers to write.
|
1200 |
|
|
|
1201 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1202 |
|
|
/*---------------------------------------------------------------------------*/
|
1203 |
|
|
|
1204 |
|
|
static enum or1k_jtag_errors
|
1205 |
|
|
jp1_write_jtag_block (unsigned int regnum,
|
1206 |
|
|
const uint32_t *bdata,
|
1207 |
|
|
int count)
|
1208 |
|
|
{
|
1209 |
|
|
enum or1k_jtag_errors result;
|
1210 |
|
|
int i;
|
1211 |
|
|
|
1212 |
|
|
for (i=0; i < count; i++)
|
1213 |
|
|
{
|
1214 |
|
|
result = jp1_write_jtag_reg (regnum + i, (ULONGEST)(bdata[i]));
|
1215 |
|
|
|
1216 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1217 |
|
|
{
|
1218 |
|
|
return result;
|
1219 |
|
|
}
|
1220 |
|
|
}
|
1221 |
|
|
|
1222 |
|
|
return OR1K_JTAG_ERR_NONE;
|
1223 |
|
|
|
1224 |
|
|
} /* jp1_write_jtag_block() */
|
1225 |
|
|
|
1226 |
|
|
|
1227 |
|
|
/*----------------------------------------------------------------------------*/
|
1228 |
|
|
/*!Process a local OpenRISC 1000 JTAG set chain command
|
1229 |
|
|
|
1230 |
|
|
Process the JTAG state machine to select the specified chain, unless it is
|
1231 |
|
|
already selected.
|
1232 |
|
|
|
1233 |
|
|
@param[in] chain The scan chain to use
|
1234 |
|
|
|
1235 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1236 |
|
|
/*---------------------------------------------------------------------------*/
|
1237 |
|
|
|
1238 |
|
|
static enum or1k_jtag_errors
|
1239 |
|
|
jp1_select_chain (int chain)
|
1240 |
|
|
{
|
1241 |
|
|
enum or1k_jtag_errors result;
|
1242 |
|
|
|
1243 |
|
|
/* Nothing to do if we already have the chain we want */
|
1244 |
|
|
if (or1k_jtag_current_chain == chain)
|
1245 |
|
|
{
|
1246 |
|
|
return OR1K_JTAG_ERR_NONE;
|
1247 |
|
|
}
|
1248 |
|
|
|
1249 |
|
|
/* Is it a chain we are allowed to set */
|
1250 |
|
|
if (!jp1_chain_is_valid[chain])
|
1251 |
|
|
{
|
1252 |
|
|
return OR1K_JTAG_ERR_INVALID_CHAIN;
|
1253 |
|
|
}
|
1254 |
|
|
|
1255 |
|
|
jp1_ll_prepare_control (); /* Select IR scan*/
|
1256 |
|
|
|
1257 |
|
|
jp1_ll_write_jp1 (0, 0); /* CAPTURE_IR */
|
1258 |
|
|
jp1_ll_write_jp1 (0, 0); /* SHIFT_IR */
|
1259 |
|
|
|
1260 |
|
|
/* write data, EXIT1_IR */
|
1261 |
|
|
jp1_ll_write_stream((ULONGEST)OR1K_JI_CHAIN_SELECT, OR1K_JI_SIZE, 1);
|
1262 |
|
|
|
1263 |
|
|
jp1_ll_write_jp1 (1, 0); /* UPDATE_IR */
|
1264 |
|
|
jp1_ll_write_jp1 (1, 0); /* SELECT_DR */
|
1265 |
|
|
|
1266 |
|
|
jp1_ll_write_jp1 (0, 0); /* CAPTURE_DR */
|
1267 |
|
|
jp1_ll_write_jp1 (0, 0); /* SHIFT_DR */
|
1268 |
|
|
|
1269 |
|
|
/* write data, EXIT1_DR */
|
1270 |
|
|
jp1_ll_write_stream ((ULONGEST)chain, OR1K_SC_SIZE, 1);
|
1271 |
|
|
|
1272 |
|
|
jp1_ll_write_jp1 (1, 0); /* UPDATE_DR */
|
1273 |
|
|
jp1_ll_write_jp1 (1, 0); /* SELECT_DR */
|
1274 |
|
|
|
1275 |
|
|
/* Now we have to go out of SELECT_CHAIN mode. */
|
1276 |
|
|
jp1_ll_write_jp1 (1, 0); /* SELECT_IR */
|
1277 |
|
|
jp1_ll_write_jp1 (0, 0); /* CAPTURE_IR */
|
1278 |
|
|
jp1_ll_write_jp1 (0, 0); /* SHIFT_IR */
|
1279 |
|
|
|
1280 |
|
|
/* write data, EXIT1_IR */
|
1281 |
|
|
jp1_ll_write_stream ((ULONGEST)OR1K_JI_DEBUG, OR1K_JI_SIZE, 1);
|
1282 |
|
|
|
1283 |
|
|
jp1_ll_write_jp1 (1, 0); /* UPDATE_IR */
|
1284 |
|
|
jp1_ll_write_jp1 (1, 0); /* SELECT_DR */
|
1285 |
|
|
|
1286 |
|
|
or1k_select_dr = 1;
|
1287 |
|
|
or1k_jtag_current_chain = chain;
|
1288 |
|
|
|
1289 |
|
|
return OR1K_JTAG_ERR_NONE;
|
1290 |
|
|
|
1291 |
|
|
} /* jp1_select_chain() */
|
1292 |
|
|
|
1293 |
|
|
|
1294 |
|
|
|
1295 |
|
|
/* These are the OpenRISC 1000 JTAG Protocol routines for use with a remote
|
1296 |
|
|
server. They are built on tol of the remote protocol low level helper
|
1297 |
|
|
functions. All these functions are static and have the prefix jtr_ */
|
1298 |
|
|
|
1299 |
|
|
/*----------------------------------------------------------------------------*/
|
1300 |
|
|
/*!Read a JTAG register from a remote OpenRISC 1000 JTAG server
|
1301 |
|
|
|
1302 |
|
|
What this does depends on which chain is selected.
|
1303 |
|
|
|
1304 |
|
|
Build the command from the args and send it. If successful get the
|
1305 |
|
|
response.
|
1306 |
|
|
|
1307 |
|
|
All args and the results are in host format. All transmitted data is in
|
1308 |
|
|
network format. This routine converts between the two
|
1309 |
|
|
|
1310 |
|
|
@param[in] regnum The JTAG register to read
|
1311 |
|
|
@param[out] data Pointer for the returned value.
|
1312 |
|
|
|
1313 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1314 |
|
|
/*---------------------------------------------------------------------------*/
|
1315 |
|
|
|
1316 |
|
|
static enum or1k_jtag_errors
|
1317 |
|
|
jtr_read_jtag_reg (unsigned int regnum,
|
1318 |
|
|
ULONGEST *data)
|
1319 |
|
|
{
|
1320 |
|
|
enum or1k_jtag_errors result;
|
1321 |
|
|
int fd = or1k_jtag_connection.device.fd;
|
1322 |
|
|
unsigned long int len;
|
1323 |
|
|
unsigned long int data_h;
|
1324 |
|
|
unsigned long int data_l;
|
1325 |
|
|
|
1326 |
|
|
struct jtr_read_message tx_buf;
|
1327 |
|
|
struct jtr_read_response rx_buf;
|
1328 |
|
|
|
1329 |
|
|
/* Build the command in network format */
|
1330 |
|
|
len = sizeof (tx_buf) - sizeof (tx_buf.command) - sizeof (tx_buf.length);
|
1331 |
|
|
|
1332 |
|
|
tx_buf.command = htonl (OR1K_JTAG_COMMAND_READ);
|
1333 |
|
|
tx_buf.length = htonl (len);
|
1334 |
|
|
tx_buf.address = htonl (regnum);
|
1335 |
|
|
|
1336 |
|
|
/* Try to send the command */
|
1337 |
|
|
result = jtr_ll_write (fd, &tx_buf, sizeof (tx_buf) );
|
1338 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1339 |
|
|
{
|
1340 |
|
|
return jtr_ll_check (result);
|
1341 |
|
|
}
|
1342 |
|
|
|
1343 |
|
|
/* Try to get the result */
|
1344 |
|
|
result = jtr_ll_response (fd, &rx_buf, sizeof (rx_buf) );
|
1345 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1346 |
|
|
{
|
1347 |
|
|
return jtr_ll_check (result);
|
1348 |
|
|
}
|
1349 |
|
|
|
1350 |
|
|
/* Break out the data */
|
1351 |
|
|
data_h = ntohl (rx_buf.data_h);
|
1352 |
|
|
data_l = ntohl (rx_buf.data_l);
|
1353 |
|
|
|
1354 |
|
|
*data = (((ULONGEST)data_h) << 32) | (ULONGEST)data_l;
|
1355 |
|
|
return jtr_ll_check (ntohl (rx_buf.status) );
|
1356 |
|
|
|
1357 |
|
|
} /* jtr_read_jtag_reg() */
|
1358 |
|
|
|
1359 |
|
|
|
1360 |
|
|
/*----------------------------------------------------------------------------*/
|
1361 |
|
|
/*!Write a JTAG register on a remote OpenRISC 1000 JTAG server
|
1362 |
|
|
|
1363 |
|
|
What this does depends on which chain is selected.
|
1364 |
|
|
|
1365 |
|
|
Build the command from the args and send it. If successful get the
|
1366 |
|
|
response.
|
1367 |
|
|
|
1368 |
|
|
All args and the results are in host format. All transmitted data is in
|
1369 |
|
|
network format. This routine converts between the two
|
1370 |
|
|
|
1371 |
|
|
@param[in] regnum The JTAG register to write
|
1372 |
|
|
@param[out] data The data to write
|
1373 |
|
|
|
1374 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1375 |
|
|
/*---------------------------------------------------------------------------*/
|
1376 |
|
|
|
1377 |
|
|
static enum or1k_jtag_errors
|
1378 |
|
|
jtr_write_jtag_reg (unsigned long int regnum,
|
1379 |
|
|
ULONGEST data)
|
1380 |
|
|
{
|
1381 |
|
|
enum or1k_jtag_errors result;
|
1382 |
|
|
int fd = or1k_jtag_connection.device.fd;
|
1383 |
|
|
unsigned long int len;
|
1384 |
|
|
|
1385 |
|
|
struct jtr_write_message tx_buf;
|
1386 |
|
|
struct jtr_write_response rx_buf;
|
1387 |
|
|
|
1388 |
|
|
/* Build the command in network format */
|
1389 |
|
|
len = sizeof (tx_buf) - sizeof (tx_buf.command) - sizeof (tx_buf.length);
|
1390 |
|
|
|
1391 |
|
|
tx_buf.command = htonl (OR1K_JTAG_COMMAND_WRITE);
|
1392 |
|
|
tx_buf.length = htonl (len);
|
1393 |
|
|
tx_buf.address = htonl (regnum);
|
1394 |
|
|
tx_buf.data_h = htonl((uint32_t)(data >> 32));
|
1395 |
|
|
tx_buf.data_l = htonl((uint32_t)(data & 0xffffffff));
|
1396 |
|
|
|
1397 |
|
|
/* Try to send the command */
|
1398 |
|
|
result = jtr_ll_write (fd, &tx_buf, sizeof (tx_buf) );
|
1399 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1400 |
|
|
{
|
1401 |
|
|
return jtr_ll_check (result);
|
1402 |
|
|
}
|
1403 |
|
|
|
1404 |
|
|
/* Try to get the result */
|
1405 |
|
|
result = jtr_ll_response (fd, &rx_buf, sizeof (rx_buf) );
|
1406 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1407 |
|
|
{
|
1408 |
|
|
return jtr_ll_check (result);
|
1409 |
|
|
}
|
1410 |
|
|
|
1411 |
|
|
/* Break out the response */
|
1412 |
|
|
return jtr_ll_check (ntohl (rx_buf.status) );
|
1413 |
|
|
|
1414 |
|
|
} /* jtr_write_jtag_reg() */
|
1415 |
|
|
|
1416 |
|
|
|
1417 |
|
|
/*----------------------------------------------------------------------------*/
|
1418 |
|
|
/*!Read a block of JTAG registers from a remote OpenRISC 1000 JTAG server
|
1419 |
|
|
|
1420 |
|
|
What this does depends on which chain is selected.
|
1421 |
|
|
|
1422 |
|
|
Construct the command from the args and send it. If successful get the
|
1423 |
|
|
response.
|
1424 |
|
|
|
1425 |
|
|
All args and the results are in host format. All transmitted data is in
|
1426 |
|
|
network format. This routine converts between the two
|
1427 |
|
|
|
1428 |
|
|
@param[in] regnum The first register to read
|
1429 |
|
|
@param[out] bdata Pointer to block of memory for the returned values.
|
1430 |
|
|
@param[out] count Number of registers to read.
|
1431 |
|
|
|
1432 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1433 |
|
|
/*---------------------------------------------------------------------------*/
|
1434 |
|
|
|
1435 |
|
|
static enum or1k_jtag_errors
|
1436 |
|
|
jtr_read_jtag_block (CORE_ADDR regnum,
|
1437 |
|
|
uint32_t *bdata,
|
1438 |
|
|
int count)
|
1439 |
|
|
{
|
1440 |
|
|
enum or1k_jtag_errors result;
|
1441 |
|
|
int fd = or1k_jtag_connection.device.fd;
|
1442 |
|
|
unsigned long int count_rv;
|
1443 |
|
|
unsigned long int len;
|
1444 |
|
|
int r;
|
1445 |
|
|
|
1446 |
|
|
struct jtr_read_block_message tx_buf;
|
1447 |
|
|
struct jtr_read_block_response rx_buf;
|
1448 |
|
|
|
1449 |
|
|
/* Build the command in network format */
|
1450 |
|
|
len = sizeof (tx_buf) - sizeof (tx_buf.command) - sizeof (tx_buf.length);
|
1451 |
|
|
|
1452 |
|
|
tx_buf.command = htonl (OR1K_JTAG_COMMAND_READ_BLOCK);
|
1453 |
|
|
tx_buf.length = htonl (len);
|
1454 |
|
|
tx_buf.address = htonl (regnum);
|
1455 |
|
|
tx_buf.num_regs = htonl (count);
|
1456 |
|
|
|
1457 |
|
|
/* Try to send the command */
|
1458 |
|
|
result = jtr_ll_write (fd, &tx_buf, sizeof (tx_buf) );
|
1459 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1460 |
|
|
{
|
1461 |
|
|
return jtr_ll_check (result);
|
1462 |
|
|
}
|
1463 |
|
|
|
1464 |
|
|
/* Try to get the result. This will have just the status and number of regs */
|
1465 |
|
|
result = jtr_ll_response (fd, &rx_buf, sizeof (rx_buf) );
|
1466 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1467 |
|
|
{
|
1468 |
|
|
return jtr_ll_check (result);
|
1469 |
|
|
}
|
1470 |
|
|
|
1471 |
|
|
/* Break out the num regs received */
|
1472 |
|
|
count_rv = ntohl (rx_buf.num_regs);
|
1473 |
|
|
|
1474 |
|
|
/* Must get the same number of regs back */
|
1475 |
|
|
if (count_rv != count)
|
1476 |
|
|
{
|
1477 |
|
|
/* Read the offered registers back to clear the protocol. We don't want
|
1478 |
|
|
them going in to the result buffer and their could be an arbitary
|
1479 |
|
|
number, so get them one at a time. */
|
1480 |
|
|
for (r = 0; r < count_rv; r++)
|
1481 |
|
|
{
|
1482 |
|
|
uint32_t dummy_data;
|
1483 |
|
|
|
1484 |
|
|
result = jtr_ll_read (fd, &dummy_data, sizeof (dummy_data) );
|
1485 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1486 |
|
|
{
|
1487 |
|
|
return jtr_ll_check (result);
|
1488 |
|
|
}
|
1489 |
|
|
}
|
1490 |
|
|
|
1491 |
|
|
return OR1K_JTAG_ERR_PROTOCOL_ERROR;
|
1492 |
|
|
}
|
1493 |
|
|
|
1494 |
|
|
/* Get the regs back and then convert them to host representation */
|
1495 |
|
|
result = jtr_ll_read (fd, bdata, count * sizeof (uint32_t) );
|
1496 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1497 |
|
|
{
|
1498 |
|
|
return jtr_ll_check (result);
|
1499 |
|
|
}
|
1500 |
|
|
|
1501 |
|
|
for (r = 0; r < count; r++)
|
1502 |
|
|
{
|
1503 |
|
|
bdata[r] = ntohl (bdata[r]);
|
1504 |
|
|
}
|
1505 |
|
|
|
1506 |
|
|
/* Return the result */
|
1507 |
|
|
return jtr_ll_check (ntohl (rx_buf.status) );
|
1508 |
|
|
|
1509 |
|
|
} /* jtr_read_jtag_block() */
|
1510 |
|
|
|
1511 |
|
|
|
1512 |
|
|
/*----------------------------------------------------------------------------*/
|
1513 |
|
|
/*!Write a block of JTAG registers on a remote OpenRISC 1000 JTAG server
|
1514 |
|
|
|
1515 |
|
|
What this does depends on which chain is selected.
|
1516 |
|
|
|
1517 |
|
|
Construct the command from the args and send it. If successful get the
|
1518 |
|
|
response.
|
1519 |
|
|
|
1520 |
|
|
All args and the results are in host format. All transmitted data is in
|
1521 |
|
|
network format. This routine converts between the two
|
1522 |
|
|
|
1523 |
|
|
@param[in] regnum The start address address for the block to be read
|
1524 |
|
|
@param[out] bdata Pointer to values to write to the block of memory.
|
1525 |
|
|
@param[out] count Number of values to read.
|
1526 |
|
|
|
1527 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1528 |
|
|
/*---------------------------------------------------------------------------*/
|
1529 |
|
|
|
1530 |
|
|
static enum or1k_jtag_errors
|
1531 |
|
|
jtr_write_jtag_block (CORE_ADDR regnum,
|
1532 |
|
|
const uint32_t *bdata,
|
1533 |
|
|
int count)
|
1534 |
|
|
{
|
1535 |
|
|
enum or1k_jtag_errors result;
|
1536 |
|
|
int fd = or1k_jtag_connection.device.fd;
|
1537 |
|
|
unsigned long int len;
|
1538 |
|
|
unsigned long int full_len;
|
1539 |
|
|
int r;
|
1540 |
|
|
|
1541 |
|
|
struct jtr_write_block_message *tx_buf; /* Allocate dynamically */
|
1542 |
|
|
struct jtr_write_block_response rx_buf;
|
1543 |
|
|
|
1544 |
|
|
/* Allocate a buffer large enough to send, then build the command */
|
1545 |
|
|
full_len = sizeof (*tx_buf) + (count - 1) * sizeof (uint32_t);
|
1546 |
|
|
len = full_len - sizeof (tx_buf->command) - sizeof (tx_buf->length);
|
1547 |
|
|
tx_buf = (struct jtr_write_block_message *)(xmalloc (full_len) );
|
1548 |
|
|
|
1549 |
|
|
tx_buf->command = htonl (OR1K_JTAG_COMMAND_WRITE_BLOCK);
|
1550 |
|
|
tx_buf->length = htonl (len);
|
1551 |
|
|
tx_buf->address = htonl (regnum);
|
1552 |
|
|
tx_buf->num_regs = htonl (count);
|
1553 |
|
|
|
1554 |
|
|
for (r = 0; r < count; r++)
|
1555 |
|
|
{
|
1556 |
|
|
tx_buf->data[r] = htonl (bdata[r]);
|
1557 |
|
|
}
|
1558 |
|
|
|
1559 |
|
|
/* Try to send the command, after which we can free the buffer */
|
1560 |
|
|
result = jtr_ll_write (fd, tx_buf, full_len);
|
1561 |
|
|
xfree (tx_buf);
|
1562 |
|
|
|
1563 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1564 |
|
|
{
|
1565 |
|
|
return jtr_ll_check (result);
|
1566 |
|
|
}
|
1567 |
|
|
|
1568 |
|
|
/* Try to get the result */
|
1569 |
|
|
result = jtr_ll_response (fd, &rx_buf, sizeof (rx_buf) );
|
1570 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1571 |
|
|
{
|
1572 |
|
|
return jtr_ll_check (result);
|
1573 |
|
|
}
|
1574 |
|
|
|
1575 |
|
|
return jtr_ll_check (ntohl (rx_buf.status) );
|
1576 |
|
|
|
1577 |
|
|
} /* jtr_write_jtag_block() */
|
1578 |
|
|
|
1579 |
|
|
|
1580 |
|
|
/*----------------------------------------------------------------------------*/
|
1581 |
|
|
/*!Select a remote OpenRISC 1000 JTAG chain command
|
1582 |
|
|
|
1583 |
|
|
Construct the command from the args and send it. If successful get the
|
1584 |
|
|
response.
|
1585 |
|
|
|
1586 |
|
|
All args and the results are in host format. All transmitted data is in
|
1587 |
|
|
network format. This routine converts between the two
|
1588 |
|
|
|
1589 |
|
|
@param[in] chain The scan chain to use
|
1590 |
|
|
|
1591 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1592 |
|
|
/*---------------------------------------------------------------------------*/
|
1593 |
|
|
|
1594 |
|
|
static enum or1k_jtag_errors
|
1595 |
|
|
jtr_select_chain (int chain)
|
1596 |
|
|
{
|
1597 |
|
|
enum or1k_jtag_errors result;
|
1598 |
|
|
int fd = or1k_jtag_connection.device.fd;
|
1599 |
|
|
unsigned long int len;
|
1600 |
|
|
|
1601 |
|
|
struct jtr_chain_message tx_buf;
|
1602 |
|
|
struct jtr_chain_response rx_buf;
|
1603 |
|
|
|
1604 |
|
|
/* Nothing to do if we already have the chain we want */
|
1605 |
|
|
if (or1k_jtag_current_chain == chain)
|
1606 |
|
|
{
|
1607 |
|
|
return OR1K_JTAG_ERR_NONE;
|
1608 |
|
|
}
|
1609 |
|
|
|
1610 |
|
|
/* Build the command in network format */
|
1611 |
|
|
len = sizeof (tx_buf) - sizeof (tx_buf.command) - sizeof (tx_buf.length);
|
1612 |
|
|
|
1613 |
|
|
tx_buf.command = htonl (OR1K_JTAG_COMMAND_CHAIN);
|
1614 |
|
|
tx_buf.length = htonl (len);
|
1615 |
|
|
tx_buf.chain = htonl (chain);
|
1616 |
|
|
|
1617 |
|
|
/* Try to send the command */
|
1618 |
|
|
result = jtr_ll_write (fd, &tx_buf, sizeof (tx_buf) );
|
1619 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1620 |
|
|
{
|
1621 |
|
|
or1k_jtag_current_chain = OR1K_SC_UNDEF;
|
1622 |
|
|
return jtr_ll_check (result);
|
1623 |
|
|
}
|
1624 |
|
|
|
1625 |
|
|
/* Try to get the result */
|
1626 |
|
|
result = jtr_ll_response (fd, &rx_buf, sizeof (rx_buf) );
|
1627 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1628 |
|
|
{
|
1629 |
|
|
or1k_jtag_current_chain = OR1K_SC_UNDEF;
|
1630 |
|
|
return jtr_ll_check (result);
|
1631 |
|
|
}
|
1632 |
|
|
|
1633 |
|
|
result = jtr_ll_check (ntohl (rx_buf.status) );
|
1634 |
|
|
|
1635 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1636 |
|
|
{
|
1637 |
|
|
or1k_jtag_current_chain = OR1K_SC_UNDEF;
|
1638 |
|
|
}
|
1639 |
|
|
else
|
1640 |
|
|
{
|
1641 |
|
|
or1k_jtag_current_chain = chain;
|
1642 |
|
|
}
|
1643 |
|
|
|
1644 |
|
|
return result;
|
1645 |
|
|
|
1646 |
|
|
} /* jtr_select_chain() */
|
1647 |
|
|
|
1648 |
|
|
|
1649 |
|
|
|
1650 |
|
|
/* These are the high level functions based on the JTAG Remote protocol,
|
1651 |
|
|
independent of whether they are local or remote. They just split the calls
|
1652 |
|
|
down to their local or remote variants. All errors are dealt with by this
|
1653 |
|
|
stage, so all functions have void returns. All functions are static and
|
1654 |
|
|
begin or1k_jtag_ */
|
1655 |
|
|
|
1656 |
|
|
/*----------------------------------------------------------------------------*/
|
1657 |
|
|
/*!Function to read a JTAG register
|
1658 |
|
|
|
1659 |
|
|
Call either the local or remote version of the corresponding JTAG function
|
1660 |
|
|
as appropriate.
|
1661 |
|
|
|
1662 |
|
|
@param[in] regnum The JTAG register to read
|
1663 |
|
|
@param[out] data Where to put the written value
|
1664 |
|
|
|
1665 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1666 |
|
|
/*---------------------------------------------------------------------------*/
|
1667 |
|
|
|
1668 |
|
|
static void
|
1669 |
|
|
or1k_jtag_read_jtag_reg (unsigned int regnum,
|
1670 |
|
|
ULONGEST *data)
|
1671 |
|
|
{
|
1672 |
|
|
enum or1k_jtag_errors result;
|
1673 |
|
|
|
1674 |
|
|
switch (or1k_jtag_connection.location)
|
1675 |
|
|
{
|
1676 |
|
|
case OR1K_JTAG_LOCAL:
|
1677 |
|
|
result = jp1_read_jtag_reg (regnum, data);
|
1678 |
|
|
break;
|
1679 |
|
|
|
1680 |
|
|
case OR1K_JTAG_REMOTE:
|
1681 |
|
|
result = jtr_read_jtag_reg (regnum, data);
|
1682 |
|
|
break;
|
1683 |
|
|
|
1684 |
|
|
default:
|
1685 |
|
|
result = OR1K_JTAG_ERR_NO_CONNECTION;
|
1686 |
|
|
break;
|
1687 |
|
|
}
|
1688 |
|
|
|
1689 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1690 |
|
|
{
|
1691 |
|
|
error ("or1k_jtag_read_jtag_reg: regnum %u, data 0x%p, result %s\n",
|
1692 |
|
|
regnum, data, or1k_jtag_err_name (result) );
|
1693 |
|
|
}
|
1694 |
|
|
} /* or1k_jtag_read_jtag_reg() */
|
1695 |
|
|
|
1696 |
|
|
|
1697 |
|
|
/*----------------------------------------------------------------------------*/
|
1698 |
|
|
/*!Function to write a JTAG register
|
1699 |
|
|
|
1700 |
|
|
Call either the local or remote version of the corresponding JTAG function
|
1701 |
|
|
as appropriate.
|
1702 |
|
|
|
1703 |
|
|
@param[in] regnum The JTAG register to write
|
1704 |
|
|
@param[in] data The value to write
|
1705 |
|
|
|
1706 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1707 |
|
|
/*---------------------------------------------------------------------------*/
|
1708 |
|
|
|
1709 |
|
|
static void
|
1710 |
|
|
or1k_jtag_write_jtag_reg (unsigned int regnum,
|
1711 |
|
|
ULONGEST data)
|
1712 |
|
|
{
|
1713 |
|
|
enum or1k_jtag_errors result;
|
1714 |
|
|
|
1715 |
|
|
switch (or1k_jtag_connection.location)
|
1716 |
|
|
{
|
1717 |
|
|
case OR1K_JTAG_LOCAL:
|
1718 |
|
|
result = jp1_write_jtag_reg((unsigned long int)regnum, data);
|
1719 |
|
|
break;
|
1720 |
|
|
|
1721 |
|
|
case OR1K_JTAG_REMOTE:
|
1722 |
|
|
result = jtr_write_jtag_reg((unsigned long int)regnum, data);
|
1723 |
|
|
break;
|
1724 |
|
|
|
1725 |
|
|
default:
|
1726 |
|
|
result = OR1K_JTAG_ERR_NO_CONNECTION;
|
1727 |
|
|
break;
|
1728 |
|
|
}
|
1729 |
|
|
|
1730 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1731 |
|
|
{
|
1732 |
|
|
error ("or1k_jtag_write_jtag_reg: regnum %u, data 0x%16llx, result %s\n",
|
1733 |
|
|
regnum, (long long unsigned int)data, or1k_jtag_err_name (result) );
|
1734 |
|
|
}
|
1735 |
|
|
} /* or1k_jtag_write_jtag_reg() */
|
1736 |
|
|
|
1737 |
|
|
|
1738 |
|
|
/*----------------------------------------------------------------------------*/
|
1739 |
|
|
/*!Function to read a block of JTAG registers via OpenRISC 1000 JTAG
|
1740 |
|
|
|
1741 |
|
|
Call either the local or remote version of the corresponding JTAG function
|
1742 |
|
|
as appropriate.
|
1743 |
|
|
|
1744 |
|
|
@param[in] regnum The starting register
|
1745 |
|
|
@param[out] bdata Pointer to a buffer for the results
|
1746 |
|
|
@param[in] count Number of registers to be read
|
1747 |
|
|
|
1748 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1749 |
|
|
/*---------------------------------------------------------------------------*/
|
1750 |
|
|
|
1751 |
|
|
static void
|
1752 |
|
|
or1k_jtag_read_jtag_block (unsigned int regnum,
|
1753 |
|
|
uint32_t *bdata,
|
1754 |
|
|
int count)
|
1755 |
|
|
{
|
1756 |
|
|
enum or1k_jtag_errors result;
|
1757 |
|
|
|
1758 |
|
|
switch (or1k_jtag_connection.location)
|
1759 |
|
|
{
|
1760 |
|
|
case OR1K_JTAG_LOCAL:
|
1761 |
|
|
result = jp1_read_jtag_block (regnum, bdata, count);
|
1762 |
|
|
break;
|
1763 |
|
|
|
1764 |
|
|
case OR1K_JTAG_REMOTE:
|
1765 |
|
|
result = jtr_read_jtag_block (regnum, bdata, count);
|
1766 |
|
|
break;
|
1767 |
|
|
|
1768 |
|
|
default:
|
1769 |
|
|
result = OR1K_JTAG_ERR_NO_CONNECTION;
|
1770 |
|
|
break;
|
1771 |
|
|
}
|
1772 |
|
|
|
1773 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1774 |
|
|
{
|
1775 |
|
|
error ("or1k_jtag_read_jtag_block: "
|
1776 |
|
|
"regnum %u, bdata 0x%p, count %d, result %s\n",
|
1777 |
|
|
regnum, bdata, count, or1k_jtag_err_name (result) );
|
1778 |
|
|
}
|
1779 |
|
|
} /* or1k_jtag_read_jtag_block() */
|
1780 |
|
|
|
1781 |
|
|
|
1782 |
|
|
/*----------------------------------------------------------------------------*/
|
1783 |
|
|
/*!Function to write a block of JTAG registers via OpenRISC 1000 JTAG
|
1784 |
|
|
|
1785 |
|
|
Call either the local or remote version of the corresponding JTAG function
|
1786 |
|
|
as appropriate.
|
1787 |
|
|
|
1788 |
|
|
@param[in] regnum The starting register to write
|
1789 |
|
|
@param[out] bdata Pointer to a buffer with the values to write
|
1790 |
|
|
@param[in] count Number of values to write
|
1791 |
|
|
|
1792 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1793 |
|
|
/*---------------------------------------------------------------------------*/
|
1794 |
|
|
|
1795 |
|
|
static void
|
1796 |
|
|
or1k_jtag_write_jtag_block (unsigned int regnum,
|
1797 |
|
|
const uint32_t *bdata,
|
1798 |
|
|
int count)
|
1799 |
|
|
{
|
1800 |
|
|
enum or1k_jtag_errors result;
|
1801 |
|
|
|
1802 |
|
|
switch (or1k_jtag_connection.location)
|
1803 |
|
|
{
|
1804 |
|
|
case OR1K_JTAG_LOCAL:
|
1805 |
|
|
result = jp1_write_jtag_block (regnum, bdata, count);
|
1806 |
|
|
break;
|
1807 |
|
|
|
1808 |
|
|
case OR1K_JTAG_REMOTE:
|
1809 |
|
|
result = jtr_write_jtag_block (regnum, bdata, count);
|
1810 |
|
|
break;
|
1811 |
|
|
|
1812 |
|
|
default:
|
1813 |
|
|
result = OR1K_JTAG_ERR_NO_CONNECTION;
|
1814 |
|
|
break;
|
1815 |
|
|
}
|
1816 |
|
|
|
1817 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1818 |
|
|
{
|
1819 |
|
|
error ("or1k_jtag_write_jtag_block: "
|
1820 |
|
|
"regnum %u, bdata 0x%p, count %d, result %s\n",
|
1821 |
|
|
regnum, bdata, count, or1k_jtag_err_name (result) );
|
1822 |
|
|
}
|
1823 |
|
|
} /* or1k_jtag_write_jtag_block() */
|
1824 |
|
|
|
1825 |
|
|
|
1826 |
|
|
/*----------------------------------------------------------------------------*/
|
1827 |
|
|
/*!Function to select a scan chain via OpenRISC 1000 JTAG
|
1828 |
|
|
|
1829 |
|
|
Call either the local or remote version of the corresponding JTAG function
|
1830 |
|
|
as appropriate.
|
1831 |
|
|
|
1832 |
|
|
@param[in] chain The scan chain to use
|
1833 |
|
|
|
1834 |
|
|
@return system error (positive) or OR1K JTAG error code */
|
1835 |
|
|
/*---------------------------------------------------------------------------*/
|
1836 |
|
|
|
1837 |
|
|
static void
|
1838 |
|
|
or1k_jtag_select_chain (int chain)
|
1839 |
|
|
{
|
1840 |
|
|
enum or1k_jtag_errors result;
|
1841 |
|
|
|
1842 |
|
|
switch (or1k_jtag_connection.location)
|
1843 |
|
|
{
|
1844 |
|
|
case OR1K_JTAG_LOCAL:
|
1845 |
|
|
result = jp1_select_chain (chain);
|
1846 |
|
|
break;
|
1847 |
|
|
|
1848 |
|
|
case OR1K_JTAG_REMOTE:
|
1849 |
|
|
result = jtr_select_chain (chain);
|
1850 |
|
|
break;
|
1851 |
|
|
|
1852 |
|
|
default:
|
1853 |
|
|
result = OR1K_JTAG_ERR_NO_CONNECTION;
|
1854 |
|
|
break;
|
1855 |
|
|
}
|
1856 |
|
|
|
1857 |
|
|
if (OR1K_JTAG_ERR_NONE != result)
|
1858 |
|
|
{
|
1859 |
|
|
error ("or1k_jtag_select_chain: chain %d, result %s\n", chain,
|
1860 |
|
|
or1k_jtag_err_name (result) );
|
1861 |
|
|
}
|
1862 |
|
|
} /* or1k_jtag_select_chain() */
|
1863 |
|
|
|
1864 |
|
|
|
1865 |
|
|
/*----------------------------------------------------------------------------*/
|
1866 |
|
|
/*!Function to reset the CPU.
|
1867 |
|
|
|
1868 |
|
|
This takes the processor into reset and then releases the reset.
|
1869 |
|
|
|
1870 |
|
|
The code is drawn from the GDB 5.3 code, pending clarification of how the
|
1871 |
|
|
reset works on real hardware. However there is no attempt to clear HW trace
|
1872 |
|
|
(not available with Igor Moder's version of the JTAG hardware), nor to set
|
1873 |
|
|
the stall flag (reset is defined to clear stall).
|
1874 |
|
|
|
1875 |
|
|
Use the underlying JTAG protocol calls to select the relevant scan chain
|
1876 |
|
|
and change the relevant registers. Always succeeds.
|
1877 |
|
|
*/
|
1878 |
|
|
/*---------------------------------------------------------------------------*/
|
1879 |
|
|
|
1880 |
|
|
static void
|
1881 |
|
|
or1k_jtag_reset()
|
1882 |
|
|
{
|
1883 |
|
|
ULONGEST data;
|
1884 |
|
|
|
1885 |
|
|
/* Select the correct chain for controlling the processor */
|
1886 |
|
|
or1k_jtag_select_chain (OR1K_SC_REGISTER);
|
1887 |
|
|
|
1888 |
|
|
/* Read the JTAG register, set the and reset bit and write it back */
|
1889 |
|
|
or1k_jtag_read_jtag_reg (OR1K_JTAG_RISCOP, &data);
|
1890 |
|
|
data |= OR1K_JTAG_RISCOP_RESET;
|
1891 |
|
|
or1k_jtag_write_jtag_reg (OR1K_JTAG_RISCOP, data);
|
1892 |
|
|
|
1893 |
|
|
/* Wait 1000 microseconds. The old code used to loop reading the register
|
1894 |
|
|
100 times before this, but we've left that out. */
|
1895 |
|
|
usleep (1000);
|
1896 |
|
|
|
1897 |
|
|
/* Clear the reset bit and write it back. The old code used to read the
|
1898 |
|
|
register back (and ignore the result), but we don't bother. */
|
1899 |
|
|
data &= ~OR1K_JTAG_RISCOP_RESET;
|
1900 |
|
|
or1k_jtag_write_jtag_reg (OR1K_JTAG_RISCOP, data);
|
1901 |
|
|
|
1902 |
|
|
} /* or1k_jtag_reset() */
|
1903 |
|
|
|
1904 |
|
|
|
1905 |
|
|
/*----------------------------------------------------------------------------*/
|
1906 |
|
|
/*!Utility method to turn an OpenRISC 1000 JTAG error into a string
|
1907 |
|
|
|
1908 |
|
|
Positive error values are system errors, negative values OpenRISC 100 JTAG
|
1909 |
|
|
errors.
|
1910 |
|
|
|
1911 |
|
|
@param[in] e The error number */
|
1912 |
|
|
/*---------------------------------------------------------------------------*/
|
1913 |
|
|
|
1914 |
|
|
static const char *
|
1915 |
|
|
or1k_jtag_err_name (enum or1k_jtag_errors e)
|
1916 |
|
|
{
|
1917 |
|
|
const char *jtag_err[] =
|
1918 |
|
|
{
|
1919 |
|
|
"None",
|
1920 |
|
|
"JTAG CRC error",
|
1921 |
|
|
"JTAG memory error",
|
1922 |
|
|
"Invalid JTAG command"
|
1923 |
|
|
"Remote JTAG server terminated",
|
1924 |
|
|
"No JTAG server connection",
|
1925 |
|
|
"JTAG protocol error",
|
1926 |
|
|
"JTAG command not implemented",
|
1927 |
|
|
"Invalid JTAG chain",
|
1928 |
|
|
"Invalid JTAG address",
|
1929 |
|
|
"JTAG access exception",
|
1930 |
|
|
"Invalid JTAG length",
|
1931 |
|
|
"JTAG out of memory"
|
1932 |
|
|
};
|
1933 |
|
|
|
1934 |
|
|
if (e > 0)
|
1935 |
|
|
{
|
1936 |
|
|
return strerror (e);
|
1937 |
|
|
}
|
1938 |
|
|
else
|
1939 |
|
|
{
|
1940 |
|
|
return jtag_err[-e];
|
1941 |
|
|
}
|
1942 |
|
|
} /* or1k_jtag_err_name() */
|
1943 |
|
|
|
1944 |
|
|
|
1945 |
|
|
|
1946 |
|
|
/* These are the high level public functions. They call the underlying
|
1947 |
|
|
functions based on the OR1K JTAG protocol. */
|
1948 |
|
|
|
1949 |
|
|
/*----------------------------------------------------------------------------*/
|
1950 |
|
|
/*!Initialize a new OpenRISC 1000 JTAG connection.
|
1951 |
|
|
|
1952 |
|
|
Initialize a new connection to the or1k board, and make sure we are really
|
1953 |
|
|
connected.
|
1954 |
|
|
|
1955 |
|
|
@param[in] args The entity to connect to followed by an optional NO_RESET
|
1956 |
|
|
flag */
|
1957 |
|
|
/*--------------------------------------------------------------------------*/
|
1958 |
|
|
|
1959 |
|
|
void
|
1960 |
|
|
or1k_jtag_init (char *args)
|
1961 |
|
|
{
|
1962 |
|
|
char *port_name;
|
1963 |
|
|
char *reset_arg;
|
1964 |
|
|
char **argv;
|
1965 |
|
|
int remote_offset;
|
1966 |
|
|
|
1967 |
|
|
if (args == 0)
|
1968 |
|
|
{ /* CZ */
|
1969 |
|
|
error ("or1k_jtag_init: To open a or1k remote debugging connection,\n"
|
1970 |
|
|
"you need to specify a parallel port connected to the target\n"
|
1971 |
|
|
"board, or else a remote server which will proxy these services\n"
|
1972 |
|
|
"for you.\n"
|
1973 |
|
|
"Example: /dev/lp0 or jtag://debughost.mydomain.com:8100.\n");
|
1974 |
|
|
return;
|
1975 |
|
|
}
|
1976 |
|
|
|
1977 |
|
|
/* If we currently have an open connection, shut it down. This is due to a
|
1978 |
|
|
temporary bug in gdb. */
|
1979 |
|
|
switch(or1k_jtag_connection.location)
|
1980 |
|
|
{
|
1981 |
|
|
case OR1K_JTAG_REMOTE:
|
1982 |
|
|
if (or1k_jtag_connection.device.fd > 0)
|
1983 |
|
|
{
|
1984 |
|
|
jtr_ll_close ();
|
1985 |
|
|
}
|
1986 |
|
|
break;
|
1987 |
|
|
case OR1K_JTAG_LOCAL:
|
1988 |
|
|
if (or1k_jtag_connection.device.lp > 0)
|
1989 |
|
|
{
|
1990 |
|
|
close (or1k_jtag_connection.device.lp);
|
1991 |
|
|
}
|
1992 |
|
|
break;
|
1993 |
|
|
}
|
1994 |
|
|
|
1995 |
|
|
/* Parse the port name. Use libiberty to get rid of quote marks etc. */
|
1996 |
|
|
argv = buildargv (args);
|
1997 |
|
|
if (NULL == argv)
|
1998 |
|
|
{
|
1999 |
|
|
nomem (0); /* Memory exhaustion is only cause of failure */
|
2000 |
|
|
return;
|
2001 |
|
|
}
|
2002 |
|
|
port_name = xstrdup (argv[0]);
|
2003 |
|
|
|
2004 |
|
|
if (NULL != argv[1])
|
2005 |
|
|
{
|
2006 |
|
|
reset_arg = xstrdup (argv[1]);
|
2007 |
|
|
}
|
2008 |
|
|
else
|
2009 |
|
|
{
|
2010 |
|
|
reset_arg = NULL;
|
2011 |
|
|
}
|
2012 |
|
|
|
2013 |
|
|
make_cleanup_freeargv (argv);
|
2014 |
|
|
|
2015 |
|
|
/* CZ 24/05/01 - Check to see if we have specified a remote jtag interface
|
2016 |
|
|
or a local one. It is remote if it follows one of the URL naming
|
2017 |
|
|
conventions:
|
2018 |
|
|
|
2019 |
|
|
jtag://<hostname>:<port_or_service> (default debug interface)
|
2020 |
|
|
jtag_orpsoc://<hostname>:<port_or_service> (orpsoc debug interface)
|
2021 |
|
|
jtag_mohor://<hostname>:<port_or_service> (Igor Mohor's debug interface)
|
2022 |
|
|
|
2023 |
|
|
Work out the offset to the end of the :// in remote_offset, then use this
|
2024 |
|
|
as an indicator of whether a remote or local interface was requested.
|
2025 |
|
|
*/
|
2026 |
|
|
if (0 == strncmp (port_name, "jtag://", 7))
|
2027 |
|
|
{
|
2028 |
|
|
remote_offset = 7;
|
2029 |
|
|
or1k_dbg_if_version = OR1K_DBG_IF_ORPSOC;
|
2030 |
|
|
}
|
2031 |
|
|
else if (0 == strncmp (port_name, "jtag_orpsoc://", 14))
|
2032 |
|
|
{
|
2033 |
|
|
remote_offset = 14;
|
2034 |
|
|
or1k_dbg_if_version = OR1K_DBG_IF_ORPSOC;
|
2035 |
|
|
}
|
2036 |
|
|
else if (0 == strncmp (port_name, "jtag_mohor://", 13))
|
2037 |
|
|
{
|
2038 |
|
|
remote_offset = 13;
|
2039 |
|
|
or1k_dbg_if_version = OR1K_DBG_IF_MOHOR;
|
2040 |
|
|
}
|
2041 |
|
|
else
|
2042 |
|
|
{
|
2043 |
|
|
remote_offset = 0;
|
2044 |
|
|
}
|
2045 |
|
|
|
2046 |
|
|
if (remote_offset > 0)
|
2047 |
|
|
{
|
2048 |
|
|
/* Interface is remote */
|
2049 |
|
|
/* Connect to the remote proxy server */
|
2050 |
|
|
char *port_or_service = strchr (&(port_name[remote_offset]), ':');
|
2051 |
|
|
char hostname[256];
|
2052 |
|
|
int len;
|
2053 |
|
|
|
2054 |
|
|
if (NULL == port_or_service)
|
2055 |
|
|
{
|
2056 |
|
|
error ("or1k_jtag_init: must specify remote port or service\n");
|
2057 |
|
|
free (port_name);
|
2058 |
|
|
return;
|
2059 |
|
|
}
|
2060 |
|
|
|
2061 |
|
|
len = port_or_service - port_name - remote_offset;
|
2062 |
|
|
strncpy (hostname, &port_name[remote_offset], len);
|
2063 |
|
|
hostname[len] = '\0';
|
2064 |
|
|
port_or_service++;
|
2065 |
|
|
|
2066 |
|
|
or1k_jtag_connection.device.fd = jtr_ll_connect (hostname,
|
2067 |
|
|
port_or_service);
|
2068 |
|
|
free (port_name);
|
2069 |
|
|
if (0 == or1k_jtag_connection.device.fd)
|
2070 |
|
|
{
|
2071 |
|
|
error ("or1k_jtag_init: can't access JTAG Proxy Server at \"%s\"",
|
2072 |
|
|
port_name);
|
2073 |
|
|
return;
|
2074 |
|
|
}
|
2075 |
|
|
|
2076 |
|
|
or1k_jtag_connection.location = OR1K_JTAG_REMOTE;
|
2077 |
|
|
}
|
2078 |
|
|
else
|
2079 |
|
|
{
|
2080 |
|
|
/* Interface is local */
|
2081 |
|
|
/* Open and initialize the parallel port. */
|
2082 |
|
|
or1k_jtag_connection.device.lp = open (port_name, O_WRONLY);
|
2083 |
|
|
free (port_name);
|
2084 |
|
|
|
2085 |
|
|
if (or1k_jtag_connection.device.lp < 0)
|
2086 |
|
|
{
|
2087 |
|
|
error ("Cannot open device.");
|
2088 |
|
|
return;
|
2089 |
|
|
}
|
2090 |
|
|
|
2091 |
|
|
jp1_ll_reset_jp1 ();
|
2092 |
|
|
or1k_jtag_connection.location = OR1K_JTAG_LOCAL; /* CZ */
|
2093 |
|
|
}
|
2094 |
|
|
|
2095 |
|
|
or1k_jtag_current_chain = OR1K_SC_UNDEF;
|
2096 |
|
|
|
2097 |
|
|
/* See if the user requested a reset */
|
2098 |
|
|
|
2099 |
|
|
if (NULL != reset_arg)
|
2100 |
|
|
{
|
2101 |
|
|
if (0 == strncasecmp( reset_arg, "RESET", strlen ("RESET")))
|
2102 |
|
|
{
|
2103 |
|
|
or1k_jtag_reset ();
|
2104 |
|
|
}
|
2105 |
|
|
else
|
2106 |
|
|
{
|
2107 |
|
|
warning ("or1k_jtag_init: unrecognized argument, assume no reset\n");
|
2108 |
|
|
}
|
2109 |
|
|
}
|
2110 |
|
|
|
2111 |
|
|
} /* or1k_jtag_init() */
|
2112 |
|
|
|
2113 |
|
|
|
2114 |
|
|
/*----------------------------------------------------------------------------*/
|
2115 |
|
|
/*!Close down an OpenRISC 1000 JTAG connection.
|
2116 |
|
|
|
2117 |
|
|
Fixed an apparent problem - jtr_ll_close() should not be used with the local
|
2118 |
|
|
connection, since it isn't a socket.
|
2119 |
|
|
*/
|
2120 |
|
|
/*---------------------------------------------------------------------------*/
|
2121 |
|
|
|
2122 |
|
|
void
|
2123 |
|
|
or1k_jtag_close() /* CZ */
|
2124 |
|
|
{
|
2125 |
|
|
switch (or1k_jtag_connection.location)
|
2126 |
|
|
{
|
2127 |
|
|
case OR1K_JTAG_LOCAL:
|
2128 |
|
|
(void)close (or1k_jtag_connection.device.lp);
|
2129 |
|
|
or1k_jtag_connection.device.lp = 0;
|
2130 |
|
|
break;
|
2131 |
|
|
|
2132 |
|
|
case OR1K_JTAG_REMOTE:
|
2133 |
|
|
jtr_ll_close ();
|
2134 |
|
|
or1k_jtag_connection.device.fd = 0;
|
2135 |
|
|
break;
|
2136 |
|
|
}
|
2137 |
|
|
|
2138 |
|
|
or1k_jtag_connection.location = OR1K_JTAG_NOT_CONNECTED;
|
2139 |
|
|
|
2140 |
|
|
} /* or1k_jtag_close() */
|
2141 |
|
|
|
2142 |
|
|
|
2143 |
|
|
/*----------------------------------------------------------------------------*/
|
2144 |
|
|
/*!Global function to read a special purpose register via OpenRISC 1000 JTAG
|
2145 |
|
|
|
2146 |
|
|
This can be used to read GPRs, since GPRs are mapped onto SPRs.
|
2147 |
|
|
|
2148 |
|
|
Use the underlying JTAG protocol calls to select the relevant scan chain
|
2149 |
|
|
and get the SPR value. Always succeeds.
|
2150 |
|
|
|
2151 |
|
|
@param[in] sprnum The address (register) to read
|
2152 |
|
|
|
2153 |
|
|
@return The value read */
|
2154 |
|
|
/*---------------------------------------------------------------------------*/
|
2155 |
|
|
|
2156 |
|
|
ULONGEST
|
2157 |
|
|
or1k_jtag_read_spr (unsigned int sprnum)
|
2158 |
|
|
{
|
2159 |
|
|
ULONGEST data;
|
2160 |
|
|
|
2161 |
|
|
/* Select the correct chain for SPR read/write, then read */
|
2162 |
|
|
or1k_jtag_select_chain (OR1K_SC_RISC_DEBUG);
|
2163 |
|
|
or1k_jtag_read_jtag_reg (sprnum, &data);
|
2164 |
|
|
|
2165 |
|
|
return data;
|
2166 |
|
|
|
2167 |
|
|
} /* or1k_jtag_read_spr() */
|
2168 |
|
|
|
2169 |
|
|
|
2170 |
|
|
/*----------------------------------------------------------------------------*/
|
2171 |
|
|
/*!Global function to write a special purpose register via OpenRISC 1000 JTAG
|
2172 |
|
|
|
2173 |
|
|
This can be used to write GPRs, since GPRs are mapped onto SPRs.
|
2174 |
|
|
|
2175 |
|
|
Use the underlying JTAG protocol calls to select the relevant scan chain
|
2176 |
|
|
and write the SPR value. Always succeeds.
|
2177 |
|
|
|
2178 |
|
|
@param[in] sprnum The SPR to write
|
2179 |
|
|
@param[in] data The value to write */
|
2180 |
|
|
/*---------------------------------------------------------------------------*/
|
2181 |
|
|
|
2182 |
|
|
void
|
2183 |
|
|
or1k_jtag_write_spr (unsigned int sprnum,
|
2184 |
|
|
ULONGEST data)
|
2185 |
|
|
{
|
2186 |
|
|
/* Select the correct chain for SPR read/write, then write */
|
2187 |
|
|
or1k_jtag_select_chain (OR1K_SC_RISC_DEBUG);
|
2188 |
|
|
or1k_jtag_write_jtag_reg (sprnum, data);
|
2189 |
|
|
|
2190 |
|
|
} /* or1k_jtag_write_spr() */
|
2191 |
|
|
|
2192 |
|
|
|
2193 |
|
|
/*----------------------------------------------------------------------------*/
|
2194 |
|
|
/*!Global function to read a block of memory via OpenRISC 1000 JTAG
|
2195 |
|
|
|
2196 |
|
|
Use the underlying JTAG protocol calls to select the relevant scan chain
|
2197 |
|
|
and read the memory. Always succeeds.
|
2198 |
|
|
|
2199 |
|
|
The underlying protocol only reads whole uint32_t words, so we must fix
|
2200 |
|
|
this if the address and/or len are not on a word boundary with partial
|
2201 |
|
|
reads.
|
2202 |
|
|
|
2203 |
|
|
This needs to work even for very small blocks of data (where the start and
|
2204 |
|
|
end may be in the same word).
|
2205 |
|
|
|
2206 |
|
|
This also runs into endianism issues, since this is a read of a stream of
|
2207 |
|
|
bytes, but the underlying JTAG call is a stream of uint32_t. We need to
|
2208 |
|
|
handle this appropriately.
|
2209 |
|
|
|
2210 |
|
|
@param[in] addr The starting address for the read
|
2211 |
|
|
@param[out] bdata Pointer to a buffer for the results
|
2212 |
|
|
@param[in] len Number of values to be read
|
2213 |
|
|
|
2214 |
|
|
@return The number of bytes read, or zero if there is an error */
|
2215 |
|
|
/*---------------------------------------------------------------------------*/
|
2216 |
|
|
|
2217 |
|
|
int
|
2218 |
|
|
or1k_jtag_read_mem (CORE_ADDR addr,
|
2219 |
|
|
gdb_byte *bdata,
|
2220 |
|
|
int len)
|
2221 |
|
|
{
|
2222 |
|
|
const int bpw = sizeof (uint32_t);
|
2223 |
|
|
CORE_ADDR offset_mask = (CORE_ADDR)(bpw - 1);
|
2224 |
|
|
CORE_ADDR word_mask = ~offset_mask;
|
2225 |
|
|
|
2226 |
|
|
int start_off = addr & offset_mask;
|
2227 |
|
|
int end_off = (addr + len) & offset_mask;
|
2228 |
|
|
int start_bytes = (bpw - start_off) % bpw;
|
2229 |
|
|
int end_bytes = end_off;
|
2230 |
|
|
CORE_ADDR aligned = (CORE_ADDR)(addr + bpw - 1) & word_mask;
|
2231 |
|
|
int word_count;
|
2232 |
|
|
|
2233 |
|
|
gdb_byte buf[bpw];
|
2234 |
|
|
int w;
|
2235 |
|
|
|
2236 |
|
|
/* Scan chain for memory access */
|
2237 |
|
|
or1k_jtag_select_chain (OR1K_SC_WISHBONE);
|
2238 |
|
|
|
2239 |
|
|
/* Get any odd start bytes */
|
2240 |
|
|
if (0 != start_bytes)
|
2241 |
|
|
{
|
2242 |
|
|
ULONGEST data;
|
2243 |
|
|
int i;
|
2244 |
|
|
|
2245 |
|
|
start_bytes = start_bytes < len ? start_bytes : len;
|
2246 |
|
|
|
2247 |
|
|
/* Read word (target endianism) and unpack allowing for the
|
2248 |
|
|
endianism. Buffer will now have the character that was at the lowest
|
2249 |
|
|
address at the lowest address in the buffer, independent of the
|
2250 |
|
|
endianism. */
|
2251 |
|
|
or1k_jtag_read_jtag_reg (aligned - bpw, &data);
|
2252 |
|
|
store_unsigned_integer (buf, bpw, data);
|
2253 |
|
|
|
2254 |
|
|
/* Copy to the main buffer */
|
2255 |
|
|
for (i = 0; i < start_bytes; i++)
|
2256 |
|
|
{
|
2257 |
|
|
bdata[i] = buf[start_off + i];
|
2258 |
|
|
}
|
2259 |
|
|
|
2260 |
|
|
/* If this was the lot, stop here */
|
2261 |
|
|
if( len == start_bytes )
|
2262 |
|
|
{
|
2263 |
|
|
return len;
|
2264 |
|
|
}
|
2265 |
|
|
}
|
2266 |
|
|
|
2267 |
|
|
/* Get the main block (if any). This will be a string of words (target
|
2268 |
|
|
endianism), which we have to unpack to characters, so that the character
|
2269 |
|
|
at the lowest address in the word ends up in the lowest address in the
|
2270 |
|
|
buffer, independent of the endianism. */
|
2271 |
|
|
|
2272 |
|
|
word_count = (len - start_bytes - end_bytes) / bpw;
|
2273 |
|
|
|
2274 |
|
|
if (word_count > 0)
|
2275 |
|
|
{
|
2276 |
|
|
or1k_jtag_read_jtag_block (aligned, (uint32_t *)(bdata + start_bytes),
|
2277 |
|
|
word_count);
|
2278 |
|
|
|
2279 |
|
|
for (w = 0; w < word_count; w++)
|
2280 |
|
|
{
|
2281 |
|
|
gdb_byte *offset = bdata + start_bytes + w * bpw;
|
2282 |
|
|
|
2283 |
|
|
store_unsigned_integer (offset, bpw, *((uint32_t *)offset));
|
2284 |
|
|
}
|
2285 |
|
|
}
|
2286 |
|
|
|
2287 |
|
|
/* Get any odd end bytes */
|
2288 |
|
|
if (0 != end_bytes)
|
2289 |
|
|
{
|
2290 |
|
|
ULONGEST data;
|
2291 |
|
|
int i;
|
2292 |
|
|
|
2293 |
|
|
/* Read word and convert to endianism independent buffer */
|
2294 |
|
|
or1k_jtag_read_jtag_reg (aligned + word_count * bpw, &data);
|
2295 |
|
|
store_unsigned_integer (buf, bpw, data);
|
2296 |
|
|
|
2297 |
|
|
/* Copy the relevant bytes to the main buffer */
|
2298 |
|
|
for (i = 0; i < end_bytes; i++)
|
2299 |
|
|
{
|
2300 |
|
|
bdata[start_bytes + word_count * bpw + i] = buf[i];
|
2301 |
|
|
}
|
2302 |
|
|
}
|
2303 |
|
|
|
2304 |
|
|
return len;
|
2305 |
|
|
|
2306 |
|
|
} /* or1k_jtag_read_mem() */
|
2307 |
|
|
|
2308 |
|
|
|
2309 |
|
|
/*----------------------------------------------------------------------------*/
|
2310 |
|
|
/*!Global function to write a block of memory via OpenRISC 1000 JTAG
|
2311 |
|
|
|
2312 |
|
|
Use the underlying JTAG protocol calls to select the relevant scan chain
|
2313 |
|
|
and write the memory. Always succeeds.
|
2314 |
|
|
|
2315 |
|
|
The underlying protocol only writes whole words, so we must fix this if the
|
2316 |
|
|
address and/or len are not on a word boundary with partial writes.
|
2317 |
|
|
|
2318 |
|
|
This also runs into endianism issues, since this is a read of a stream of
|
2319 |
|
|
bytes, but the underlying JTAG call is a stream of uint32_t. We need to
|
2320 |
|
|
handle this appropriately.
|
2321 |
|
|
|
2322 |
|
|
@param[in] addr The starting address for the read
|
2323 |
|
|
@param[out] bdata Pointer to a buffer for the results
|
2324 |
|
|
@param[in] len Number of values to be read
|
2325 |
|
|
|
2326 |
|
|
@return The number of bytes read, or zero if there is an error */
|
2327 |
|
|
/*---------------------------------------------------------------------------*/
|
2328 |
|
|
|
2329 |
|
|
int
|
2330 |
|
|
or1k_jtag_write_mem (CORE_ADDR addr,
|
2331 |
|
|
const gdb_byte *bdata,
|
2332 |
|
|
int len)
|
2333 |
|
|
{
|
2334 |
|
|
const int bpw = sizeof (uint32_t);
|
2335 |
|
|
CORE_ADDR offset_mask = (CORE_ADDR)(bpw - 1);
|
2336 |
|
|
CORE_ADDR word_mask = ~offset_mask;
|
2337 |
|
|
|
2338 |
|
|
int start_off = addr & offset_mask;
|
2339 |
|
|
int end_off = (addr + len) & offset_mask;
|
2340 |
|
|
int start_bytes = (bpw - start_off) % bpw;
|
2341 |
|
|
int end_bytes = end_off;
|
2342 |
|
|
CORE_ADDR aligned = (CORE_ADDR)(addr + bpw - 1) & word_mask;
|
2343 |
|
|
int word_count;
|
2344 |
|
|
|
2345 |
|
|
gdb_byte buf[bpw];
|
2346 |
|
|
int w;
|
2347 |
|
|
CORE_ADDR c;
|
2348 |
|
|
|
2349 |
|
|
/* Scan chain for memory access */
|
2350 |
|
|
or1k_jtag_select_chain (OR1K_SC_WISHBONE);
|
2351 |
|
|
|
2352 |
|
|
/* Write any odd start bytes */
|
2353 |
|
|
if (0 != start_bytes)
|
2354 |
|
|
{
|
2355 |
|
|
ULONGEST data;
|
2356 |
|
|
int i;
|
2357 |
|
|
|
2358 |
|
|
start_bytes = start_bytes < len ? start_bytes : len;
|
2359 |
|
|
|
2360 |
|
|
/* Read word (target endianism) and unpack allowing for
|
2361 |
|
|
endianism. Buffer will now have the character that was at the lowest
|
2362 |
|
|
address at the lowest address in the buffer, independent of the
|
2363 |
|
|
endianism. */
|
2364 |
|
|
or1k_jtag_read_jtag_reg (aligned - bpw, &data);
|
2365 |
|
|
store_unsigned_integer (buf, bpw, data);
|
2366 |
|
|
|
2367 |
|
|
/* Patch bytes, which is now endianism independent. */
|
2368 |
|
|
for (i = 0; i < start_bytes; i++)
|
2369 |
|
|
{
|
2370 |
|
|
buf[start_off + i] = bdata[i];
|
2371 |
|
|
}
|
2372 |
|
|
|
2373 |
|
|
/* Convert back to a value represented with target endianism and write
|
2374 |
|
|
back. */
|
2375 |
|
|
data = extract_unsigned_integer (buf, bpw);
|
2376 |
|
|
or1k_jtag_write_jtag_reg (aligned - bpw, data);
|
2377 |
|
|
|
2378 |
|
|
/* If this was the lot, stop here */
|
2379 |
|
|
if( len == start_bytes )
|
2380 |
|
|
{
|
2381 |
|
|
return len;
|
2382 |
|
|
}
|
2383 |
|
|
}
|
2384 |
|
|
|
2385 |
|
|
/* We need to patch the main data (if any) before sending, but this is
|
2386 |
|
|
immutable, so we need a copy. Since the originating buffer could be
|
2387 |
|
|
arbitrarily large we have to do this in chunks of up to
|
2388 |
|
|
OR1K_MAX_JTAG_WRITE words. */
|
2389 |
|
|
|
2390 |
|
|
word_count = (len - start_bytes - end_bytes) / bpw;
|
2391 |
|
|
|
2392 |
|
|
for (c = 0; c * OR1K_MAX_JTAG_WRITE < word_count; c++)
|
2393 |
|
|
{
|
2394 |
|
|
uint32_t new_bdata[OR1K_MAX_JTAG_WRITE * bpw];
|
2395 |
|
|
unsigned int c_offset = c * OR1K_MAX_JTAG_WRITE;
|
2396 |
|
|
unsigned int todo = word_count - c_offset;
|
2397 |
|
|
|
2398 |
|
|
todo = todo > OR1K_MAX_JTAG_WRITE ? OR1K_MAX_JTAG_WRITE : todo;
|
2399 |
|
|
|
2400 |
|
|
for (w = 0; w < todo; w++)
|
2401 |
|
|
{
|
2402 |
|
|
const gdb_byte *byte_off = bdata + start_bytes + (c_offset + w) * bpw;
|
2403 |
|
|
new_bdata[w] = extract_unsigned_integer (byte_off, bpw);
|
2404 |
|
|
}
|
2405 |
|
|
|
2406 |
|
|
/* Write the patched block */
|
2407 |
|
|
or1k_jtag_write_jtag_block (aligned + c_offset * bpw,
|
2408 |
|
|
(const uint32_t *)new_bdata, todo);
|
2409 |
|
|
}
|
2410 |
|
|
|
2411 |
|
|
/* Get any odd end bytes */
|
2412 |
|
|
if (0 != end_bytes)
|
2413 |
|
|
{
|
2414 |
|
|
ULONGEST data;
|
2415 |
|
|
int i;
|
2416 |
|
|
|
2417 |
|
|
/* Read word and convert to endianism independent buffer */
|
2418 |
|
|
or1k_jtag_read_jtag_reg (aligned + word_count * bpw, &data);
|
2419 |
|
|
store_unsigned_integer (buf, bpw, data);
|
2420 |
|
|
|
2421 |
|
|
/* Patch bytes */
|
2422 |
|
|
for (i = 0; i < end_bytes; i++)
|
2423 |
|
|
{
|
2424 |
|
|
buf[i] = bdata[start_bytes + word_count * bpw + i];
|
2425 |
|
|
}
|
2426 |
|
|
|
2427 |
|
|
/* Write back */
|
2428 |
|
|
data = extract_unsigned_integer (buf, bpw);
|
2429 |
|
|
or1k_jtag_write_jtag_reg (aligned + word_count * bpw, data);
|
2430 |
|
|
}
|
2431 |
|
|
|
2432 |
|
|
return len;
|
2433 |
|
|
|
2434 |
|
|
} /* or1k_jtag_write_mem() */
|
2435 |
|
|
|
2436 |
|
|
|
2437 |
|
|
/*----------------------------------------------------------------------------*/
|
2438 |
|
|
/*!Global function to stall the CPU
|
2439 |
|
|
|
2440 |
|
|
Use the underlying JTAG protocol calls to select the relevant scan chain
|
2441 |
|
|
and change the relevant registers. Always succeeds.
|
2442 |
|
|
|
2443 |
|
|
@todo The old code always read back at least twice after setting the stall
|
2444 |
|
|
bit. We've assumed that wasn't necessary (is any read back
|
2445 |
|
|
necessary?).
|
2446 |
|
|
|
2447 |
|
|
@todo The old code also disabled HW trace. Was that really necessary? */
|
2448 |
|
|
/*---------------------------------------------------------------------------*/
|
2449 |
|
|
|
2450 |
|
|
void
|
2451 |
|
|
or1k_jtag_stall()
|
2452 |
|
|
{
|
2453 |
|
|
ULONGEST data;
|
2454 |
|
|
|
2455 |
|
|
/* Select the correct chain for controlling the processor */
|
2456 |
|
|
or1k_jtag_select_chain (OR1K_SC_REGISTER);
|
2457 |
|
|
|
2458 |
|
|
/* Read the JTAG register, set the stall bit and write it back. */
|
2459 |
|
|
or1k_jtag_read_jtag_reg (OR1K_JTAG_RISCOP, &data);
|
2460 |
|
|
data |= OR1K_JTAG_RISCOP_STALL;
|
2461 |
|
|
or1k_jtag_write_jtag_reg (OR1K_JTAG_RISCOP, data);
|
2462 |
|
|
|
2463 |
|
|
/* Loop until we read back that the register is set. */
|
2464 |
|
|
do
|
2465 |
|
|
{
|
2466 |
|
|
or1k_jtag_read_jtag_reg (OR1K_JTAG_RISCOP, &data);
|
2467 |
|
|
}
|
2468 |
|
|
while (OR1K_JTAG_RISCOP_STALL != (data & OR1K_JTAG_RISCOP_STALL));
|
2469 |
|
|
|
2470 |
|
|
} /* or1k_jtag_stall() */
|
2471 |
|
|
|
2472 |
|
|
|
2473 |
|
|
/*----------------------------------------------------------------------------*/
|
2474 |
|
|
/*!Global function to unstall the CPU
|
2475 |
|
|
|
2476 |
|
|
Use the underlying JTAG protocol calls to select the relevant scan chain
|
2477 |
|
|
and change the relevant registers. Always succeeds.
|
2478 |
|
|
|
2479 |
|
|
@note At one stage the code used to loop to check the stall flag had been
|
2480 |
|
|
cleared. However that could allow time for the target to execute and
|
2481 |
|
|
then stall again, so this function would hang. */
|
2482 |
|
|
/*---------------------------------------------------------------------------*/
|
2483 |
|
|
|
2484 |
|
|
void
|
2485 |
|
|
or1k_jtag_unstall()
|
2486 |
|
|
{
|
2487 |
|
|
ULONGEST data;
|
2488 |
|
|
|
2489 |
|
|
/* Select the correct chain for controlling the processor */
|
2490 |
|
|
or1k_jtag_select_chain (OR1K_SC_REGISTER);
|
2491 |
|
|
|
2492 |
|
|
/* Read the JTAG register, clear the stall bit and write it back */
|
2493 |
|
|
or1k_jtag_read_jtag_reg (OR1K_JTAG_RISCOP, &data);
|
2494 |
|
|
data &= ~OR1K_JTAG_RISCOP_STALL;
|
2495 |
|
|
or1k_jtag_write_jtag_reg (OR1K_JTAG_RISCOP, data);
|
2496 |
|
|
|
2497 |
|
|
} /* or1k_jtag_unstall() */
|
2498 |
|
|
|
2499 |
|
|
|
2500 |
|
|
/*----------------------------------------------------------------------------*/
|
2501 |
|
|
/*!Global function to wait for the CPU to stall
|
2502 |
|
|
|
2503 |
|
|
Use the underlying JTAG protocol calls to wait for the processor to
|
2504 |
|
|
stall. Always succeeds.
|
2505 |
|
|
|
2506 |
|
|
The wait time should be small if we are single stepping, but can be longer
|
2507 |
|
|
otherwise. This is controlled by the argument.
|
2508 |
|
|
|
2509 |
|
|
@param[in] fast 1 (true) if the wait should be quick. */
|
2510 |
|
|
/*---------------------------------------------------------------------------*/
|
2511 |
|
|
|
2512 |
|
|
void
|
2513 |
|
|
or1k_jtag_wait (int fast)
|
2514 |
|
|
{
|
2515 |
|
|
ULONGEST data;
|
2516 |
|
|
|
2517 |
|
|
/* Select the correct chain for controlling the processor */
|
2518 |
|
|
or1k_jtag_select_chain (OR1K_SC_REGISTER);
|
2519 |
|
|
|
2520 |
|
|
/* Read the JTAG register every 10us until the stall flag is set. */
|
2521 |
|
|
do
|
2522 |
|
|
{
|
2523 |
|
|
if (fast)
|
2524 |
|
|
{
|
2525 |
|
|
usleep (OR1K_JTAG_FAST_WAIT);
|
2526 |
|
|
}
|
2527 |
|
|
else
|
2528 |
|
|
{
|
2529 |
|
|
usleep (OR1K_JTAG_SLOW_WAIT);
|
2530 |
|
|
}
|
2531 |
|
|
|
2532 |
|
|
or1k_jtag_read_jtag_reg (OR1K_JTAG_RISCOP, &data);
|
2533 |
|
|
}
|
2534 |
|
|
while (OR1K_JTAG_RISCOP_STALL != (data & OR1K_JTAG_RISCOP_STALL));
|
2535 |
|
|
|
2536 |
|
|
} /* or1k_jtag_wait() */
|
2537 |
|
|
|
2538 |
|
|
|
2539 |
|
|
/* EOF */
|