sim/cris/sim-main.h

   1 /* Main header for the CRIS simulator, based on the m32r header.
   2    Copyright (C) 2004, 2005 Free Software Foundation, Inc.
   3    Contributed by Axis Communications.
   4
   5 This file is part of the GNU simulators.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with this program; if not, write to the Free Software Foundation, Inc.,
  19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 /* All FIXME:s present in m32r apply here too; I just refuse to blindly
  22    carry them over, as I don't know if they're really things that need
  23    fixing.  */
  24
  25 #ifndef SIM_MAIN_H
  26 #define SIM_MAIN_H
  27
  28 #define USING_SIM_BASE_H
  29
  30 struct _sim_cpu;
  31 typedef struct _sim_cpu SIM_CPU;
  32
  33 #include "symcat.h"
  34 #include "sim-basics.h"
  35 #include "cgen-types.h"
  36 #include "cris-desc.h"
  37 #include "cris-opc.h"
  38 #include "arch.h"
  39
  40 /* These must be defined before sim-base.h.  */
  41 typedef USI sim_cia;
  42
  43 #define CIA_GET(cpu)     CPU_PC_GET (cpu)
  44 #define CIA_SET(cpu,val) CPU_PC_SET ((cpu), (val))
  45
  46 #define SIM_ENGINE_HALT_HOOK(sd, cpu, cia) \
  47 do { \
  48   if (cpu) /* Null if ctrl-c.  */ \
  49     sim_pc_set ((cpu), (cia)); \
  50 } while (0)
  51 #define SIM_ENGINE_RESTART_HOOK(sd, cpu, cia) \
  52 do { \
  53   sim_pc_set ((cpu), (cia)); \
  54 } while (0)
  55
  56 #include "sim-base.h"
  57 #include "cgen-sim.h"
  58 #include "cris-sim.h"
  59 \f
  60 struct cris_sim_mmapped_page {
  61   USI addr;
  62   struct cris_sim_mmapped_page *prev;
  63 };
  64
  65 struct cris_thread_info {
  66   /* Identifier for this thread.  */
  67   unsigned int threadid;
  68
  69   /* Identifier for parent thread.  */
  70   unsigned int parent_threadid;
  71
  72   /* Signal to send to parent at exit.  */
  73   int exitsig;
  74
  75   /* Exit status.  */
  76   int exitval;
  77
  78   /* Only as storage to return the "set" value to the "get" method.
  79      I'm not sure whether this is useful per-thread.  */
  80   USI priority;
  81
  82   struct
  83   {
  84     USI altstack;
  85     USI options;
  86
  87     char action;
  88     char pending;
  89     char blocked;
  90     char blocked_suspendsave;
  91     /* The handler stub unblocks the signal, so we don't need a separate
  92        "temporary save" for that.  */
  93   } sigdata[64];
  94
  95   /* Register context, swapped with _sim_cpu.cpu_data.  */
  96   void *cpu_context;
  97
  98   /* Similar, temporary copy for the state at a signal call.   */
  99   void *cpu_context_atsignal;
 100
 101   /* The number of the reading and writing ends of a pipe if waiting for
 102      the reader, else 0.  */
 103   int pipe_read_fd;
 104   int pipe_write_fd;
 105
 106   /* System time at last context switch when this thread ran.  */
 107   USI last_execution;
 108
 109   /* Nonzero if we just executed a syscall.  */
 110   char at_syscall;
 111
 112   /* Nonzero if any of sigaction[0..64].pending is true.  */
 113   char sigpending;
 114
 115   /* Nonzero if in (rt_)sigsuspend call.  Cleared at every sighandler
 116      call.  */
 117   char sigsuspended;
 118 };
 119
 120 struct _sim_cpu {
 121   /* sim/common cpu base.  */
 122   sim_cpu_base base;
 123
 124   /* Static parts of cgen.  */
 125   CGEN_CPU cgen_cpu;
 126
 127   CRIS_MISC_PROFILE cris_misc_profile;
 128 #define CPU_CRIS_MISC_PROFILE(cpu) (& (cpu)->cris_misc_profile)
 129
 130   /* Copy of previous data; only valid when emitting trace-data after
 131      each insn.  */
 132   CRIS_MISC_PROFILE cris_prev_misc_profile;
 133 #define CPU_CRIS_PREV_MISC_PROFILE(cpu) (& (cpu)->cris_prev_misc_profile)
 134
 135   /* Simulator environment data.  */
 136   USI endmem;
 137   USI endbrk;
 138   USI stack_low;
 139   struct cris_sim_mmapped_page *highest_mmapped_page;
 140
 141   /* Number of syscalls performed or in progress, counting once extra
 142      for every time a blocked thread (internally, when threading) polls
 143      the (pipe) blockage.  By default, this is also a time counter: to
 144      minimize performance noise from minor compiler changes,
 145      instructions take no time and syscalls always take 1ms.  */
 146   USI syscalls;
 147
 148   /* Number of execution contexts minus one.  */
 149   int m1threads;
 150
 151   /* Current thread number; index into thread_data when m1threads != 0.  */
 152   int threadno;
 153
 154   /* When a new thread is created, it gets a unique number, which we
 155      count here.  */
 156   int max_threadid;
 157
 158   /* Thread-specific info, for simulator thread support, created at
 159      "clone" call.  Vector of [threads+1] when m1threads > 0.  */
 160   struct cris_thread_info *thread_data;
 161
 162   /* "If CLONE_SIGHAND is set, the calling process and the child pro-
 163      cesses share the same table of signal handlers." ... "However, the
 164      calling process and child processes still have distinct signal
 165      masks and sets of pending signals."  See struct cris_thread_info
 166      for sigmasks and sigpendings. */
 167   USI sighandler[64];
 168
 169   /* This is a hack to implement just the parts of fcntl F_GETFL that
 170      are used in open+fdopen calls for the standard scenario: for such
 171      a call we check that the last syscall was open, we check that the
 172      passed fd is the same returned then, and so we return the same
 173      flags passed to open.  This way, we avoid complicating the
 174      generic sim callback machinery by introducing fcntl
 175      mechanisms.  */
 176   USI last_syscall;
 177   USI last_open_fd;
 178   USI last_open_flags;
 179
 180   /* Function for initializing CPU thread context, which varies in size
 181      with each CPU model.  They should be in some constant parts or
 182      initialized in *_init_cpu, but we can't modify that for now.  */
 183   void* (*make_thread_cpu_data) (SIM_CPU *, void *);
 184   size_t thread_cpu_data_size;
 185
 186   /* CPU-model specific parts go here.
 187      Note that in files that don't need to access these pieces WANT_CPU_FOO
 188      won't be defined and thus these parts won't appear.  This is ok in the
 189      sense that things work.  It is a source of bugs though.
 190      One has to of course be careful to not take the size of this
 191      struct and no structure members accessed in non-cpu specific files can
 192      go after here.  */
 193 #if defined (WANT_CPU_CRISV0F)
 194   CRISV0F_CPU_DATA cpu_data;
 195 #elif defined (WANT_CPU_CRISV3F)
 196   CRISV3F_CPU_DATA cpu_data;
 197 #elif defined (WANT_CPU_CRISV8F)
 198   CRISV8F_CPU_DATA cpu_data;
 199 #elif defined (WANT_CPU_CRISV10F)
 200   CRISV10F_CPU_DATA cpu_data;
 201 #elif defined (WANT_CPU_CRISV32F)
 202   CRISV32F_CPU_DATA cpu_data;
 203 #else
 204   /* Let's assume all cpu_data have the same alignment requirements, so
 205      they all are laid out at the same address.  Since we can't get the
 206      exact definition, we also assume that it has no higher alignment
 207      requirements than a vector of, say, 16 pointers.  (A single member
 208      is often special-cased, and possibly two as well so we don't want
 209      that).  */
 210   union { void *dummy[16]; } cpu_data_placeholder;
 211 #endif
 212 };
 213 \f
 214 /* The sim_state struct.  */
 215
 216 struct sim_state {
 217   sim_cpu *cpu;
 218 #define STATE_CPU(sd, n) (/*&*/ (sd)->cpu)
 219
 220   CGEN_STATE cgen_state;
 221
 222   sim_state_base base;
 223 };
 224 \f
 225 /* Misc.  */
 226
 227 /* Catch address exceptions.  */
 228 extern SIM_CORE_SIGNAL_FN cris_core_signal;
 229 #define SIM_CORE_SIGNAL(SD,CPU,CIA,MAP,NR_BYTES,ADDR,TRANSFER,ERROR) \
 230 cris_core_signal ((SD), (CPU), (CIA), (MAP), (NR_BYTES), (ADDR), \
 231                   (TRANSFER), (ERROR))
 232
 233 /* Default memory size.  */
 234 #define CRIS_DEFAULT_MEM_SIZE 0x800000 /* 8M */
 235
 236 extern device cris_devices;
 237
 238 #endif /* SIM_MAIN_H */