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[/] [openrisc/] [trunk/] [or1ksim/] [toplevel-support.c] - Rev 134
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/* toplevel.c -- Top level simulator support source file Copyright (C) 1999 Damjan Lampret, lampret@opencores.org Copyright (C) 2008 Embecosm Limited Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* This program is commented throughout in a fashion suitable for processing with Doxygen. */ /* Autoconf and/or portability configuration */ #include "config.h" /* System includes */ #include <stdlib.h> #include <unistd.h> #include <stdarg.h> #include <stdio.h> #include <errno.h> #include <signal.h> /* Package includes */ #include "toplevel-support.h" #include "sim-config.h" #include "debug-unit.h" #include "sim-cmd.h" #include "sched.h" #include "tick.h" #include "pm.h" #include "pic.h" #include "execute.h" #include "labels.h" #include "stats.h" #include "opcode/or32.h" #include "parse.h" #include "gdbcomm.h" #include "rsp-server.h" #include "vapi.h" #include "abstract.h" #include "mc.h" #include "except.h" /*! Struct for list of reset hooks */ struct sim_reset_hook { void *dat; void (*reset_hook) (void *); struct sim_reset_hook *next; }; /*! The list of reset hooks. Local to this source file */ static struct sim_reset_hook *sim_reset_hooks = NULL; /*---------------------------------------------------------------------------*/ /*!Signal handler for ctrl-C Sets the iprompt flag, so the simulator will stop next time round the loop. If the iprompt flag is set when we enter here, that means the simulator has not reacted since the last ctrl-C, so we kill the simulation. @param[in] signum The signal which triggered this handler */ /*---------------------------------------------------------------------------*/ void ctrl_c (signum) int signum; { /* Incase the user pressed ctrl+c twice without the sim reacting kill it. * This is incase the sim locks up in a high level routine, without executeing * any (or) code */ if (runtime.sim.iprompt && !runtime.sim.iprompt_run) { sim_done (); exit (-1); } /* Mark the simulator to stop next time and reinstall the handler */ runtime.sim.iprompt = 1; signal (SIGINT, ctrl_c); } /* ctrl_c() */ /*---------------------------------------------------------------------------*/ /*!Routine poll to see if interaction is needed This is most likely to happen due to a ctrl-C. However when the -i flag is specified, the simulator starts up ready for interaction. The main simulator loop will stop for interaction if it hits a breakpoint. @param[in] dat Data passed in by the Or1ksim scheduler. Not needed by this function. */ /*---------------------------------------------------------------------------*/ void check_int (void *dat) { if (runtime.sim.iprompt) { set_stall_state (0); handle_sim_command (); } SCHED_ADD (check_int, NULL, CHECK_INT_TIME); } /* check_int() */ /*---------------------------------------------------------------------------*/ /*!Register a new reset hook The registered functions will be called in turn, whenever the simulation is reset by calling sim_reset(). @param[in] reset_hook The function to be called on reset @param[in] dat The data structure to be passed as argument when the reset_hook function is called. */ /*---------------------------------------------------------------------------*/ void reg_sim_reset (void (*reset_hook) (void *), void *dat) { struct sim_reset_hook *new = malloc (sizeof (struct sim_reset_hook)); if (!new) { fprintf (stderr, "reg_sim_reset: Out-of-memory\n"); exit (1); } new->dat = dat; new->reset_hook = reset_hook; new->next = sim_reset_hooks; sim_reset_hooks = new; } /* reg_sim_reset() */ /*---------------------------------------------------------------------------*/ /*!Reset the simulator The scheduler is reset, then all reset functions on the reset hook list (i.e. peripherals) are reset. Then standard core functions (which do not use reset hooks) are reset: tick timer, power management, programmable interrupt controller and debug unit. The scheduler queue is reinitialized with an immediate check for ctrl-C on its queue. Finally the count of simulated cycles is set to zero. and the CPU itself is reset. */ /*---------------------------------------------------------------------------*/ void sim_reset () { struct sim_reset_hook *cur_reset = sim_reset_hooks; /* We absolutely MUST reset the scheduler first */ sched_reset (); while (cur_reset) { cur_reset->reset_hook (cur_reset->dat); cur_reset = cur_reset->next; } tick_reset (); pm_reset (); pic_reset (); du_reset (); /* Make sure that runtime.sim.iprompt is the first thing to get checked */ SCHED_ADD (check_int, NULL, 1); /* FIXME: Lame-ass way to get runtime.sim.mem_cycles not going into overly * negative numbers. This happens because parse.c uses setsim_mem32 to load * the program but set_mem32 calls dc_simulate_write, which inturn calls * setsim_mem32. This mess of memory statistics needs to be sorted out for * good one day */ runtime.sim.mem_cycles = 0; cpu_reset (); } /* sim_reset() */ /*---------------------------------------------------------------------------*/ /*!Initalize the simulator Reset internal data: symbol table (aka labels), breakpoints and stats. Rebuild the FSA's used for disassembly. Initialize the dynamic execution system if required. Initialize the scheduler. Open the various logs and statistics files requested by the configuration and/or command arguments. Initialize GDB and VAPI connections. Reset the simulator. Wait for VAPI to connect if configured. */ /*---------------------------------------------------------------------------*/ void sim_init () { printf ("Or1ksim " PACKAGE_VERSION "\n" ); init_labels (); init_breakpoints (); initstats (); build_automata (); #if DYNAMIC_EXECUTION /* Note: This must be called before the scheduler is used */ init_dyn_recomp (); #endif sched_init (); sim_reset (); /* Must do this first - torches memory! */ if (config.sim.profile) { runtime.sim.fprof = fopen (config.sim.prof_fn, "wt+"); if (!runtime.sim.fprof) { fprintf (stderr, "ERROR: sim_init: cannot open profile file %s: ", config.sim.prof_fn); perror (NULL); exit (1); } else fprintf (runtime.sim.fprof, "+00000000 FFFFFFFF FFFFFFFF [outside_functions]\n"); } if (config.sim.mprofile) { runtime.sim.fmprof = fopen (config.sim.mprof_fn, "wb+"); if (!runtime.sim.fmprof) { fprintf (stderr, "ERROR: sim_init: cannot open memory profile " "file %s: ", config.sim.mprof_fn); perror (NULL); exit (1); } } if (config.sim.exe_log) { runtime.sim.fexe_log = fopen (config.sim.exe_log_fn, "wt+"); if (!runtime.sim.fexe_log) { fprintf (stderr, "sim_init: cannot open execution log file %s: ", config.sim.exe_log_fn); perror (NULL); exit (1); } } /* MM170901 always load at address zero */ if (runtime.sim.filename) { unsigned long endaddr = loadcode (runtime.sim.filename, 0, 0); if (endaddr == -1) { fprintf (stderr, "ERROR: sim_init: problem loading code from %s\n", runtime.sim.filename); exit (1); } } /* Disable GDB debugging, if debug unit is not available. */ if ((config.debug.gdb_enabled || config.debug.rsp_enabled) && !config.debug.enabled) { config.debug.gdb_enabled = 0; config.debug.rsp_enabled = 0; if (config.sim.verbose) { fprintf (stderr, "WARNING: sim_init: Debug module not enabled, " "cannot start remote service to GDB\n"); } } /* Start either RSP or legacy GDB debugging service */ if (config.debug.rsp_enabled) { rsp_init (); /* RSP always starts stalled as though we have just reset the processor. */ rsp_exception (EXCEPT_TRAP); set_stall_state (1); } else if (config.debug.gdb_enabled) { gdbcomm_init (); } /* Enable dependency stats, if we want to do history analisis */ if (config.sim.history && !config.cpu.dependstats) { config.cpu.dependstats = 1; if (config.sim.verbose) { fprintf (stderr, "WARNING: sim_init: dependstats stats must be " "enabled to do history analysis\n"); } } /* Debug forces verbose */ if (config.sim.debug && !config.sim.verbose) { config.sim.verbose = 1; fprintf (stderr, "WARNING: sim_init: verbose forced on by debug\n"); } /* Start VAPI before device initialization. */ if (config.vapi.enabled) { runtime.vapi.enabled = 1; vapi_init (); if (config.sim.verbose) { PRINTF ("VAPI started, waiting for clients\n"); } } /* Wait till all test are connected. */ if (runtime.vapi.enabled) { int numu = vapi_num_unconnected (0); if (numu) { PRINTF ("\nWaiting for VAPI tests with ids:\n"); vapi_num_unconnected (1); PRINTF ("\n"); while ((numu = vapi_num_unconnected (0))) { vapi_check (); PRINTF ("\rStill waiting for %i VAPI test(s) to connect", numu); usleep (100); } PRINTF ("\n"); } PRINTF ("All devices connected\n"); } } /* sim_init() */ /*---------------------------------------------------------------------------*/ /*!Clean up Close an profile or log files, disconnect VAPI. Call any memory mapped peripheral close down function. Exit with rc 0. */ /*---------------------------------------------------------------------------*/ void sim_done () { if (config.sim.profile) { fprintf (runtime.sim.fprof, "-%08llX FFFFFFFF\n", runtime.sim.cycles); fclose (runtime.sim.fprof); } if (config.sim.mprofile) { fclose (runtime.sim.fmprof); } if (config.sim.exe_log) { fclose (runtime.sim.fexe_log); } if (runtime.vapi.enabled) { vapi_done (); } done_memory_table (); mc_done (); exit (0); } /* sim_done() */
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