sim/cris/sim-main.h

   1 /* Main header for the CRIS simulator, based on the m32r header.
   2    Copyright (C) 2004, 2005, 2006 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 typedef int (*cris_interrupt_delivery_fn) (SIM_CPU *,
 121                                            enum cris_interrupt_type,
 122                                            unsigned int);
 123
 124 struct _sim_cpu {
 125   /* sim/common cpu base.  */
 126   sim_cpu_base base;
 127
 128   /* Static parts of cgen.  */
 129   CGEN_CPU cgen_cpu;
 130
 131   CRIS_MISC_PROFILE cris_misc_profile;
 132 #define CPU_CRIS_MISC_PROFILE(cpu) (& (cpu)->cris_misc_profile)
 133
 134   /* Copy of previous data; only valid when emitting trace-data after
 135      each insn.  */
 136   CRIS_MISC_PROFILE cris_prev_misc_profile;
 137 #define CPU_CRIS_PREV_MISC_PROFILE(cpu) (& (cpu)->cris_prev_misc_profile)
 138
 139 #if WITH_HW
 140   cris_interrupt_delivery_fn deliver_interrupt;
 141 #define CPU_CRIS_DELIVER_INTERRUPT(cpu) (cpu->deliver_interrupt)
 142 #endif
 143
 144   /* Simulator environment data.  */
 145   USI endmem;
 146   USI endbrk;
 147   USI stack_low;
 148   struct cris_sim_mmapped_page *highest_mmapped_page;
 149
 150   /* Number of syscalls performed or in progress, counting once extra
 151      for every time a blocked thread (internally, when threading) polls
 152      the (pipe) blockage.  By default, this is also a time counter: to
 153      minimize performance noise from minor compiler changes,
 154      instructions take no time and syscalls always take 1ms.  */
 155   USI syscalls;
 156
 157   /* Number of execution contexts minus one.  */
 158   int m1threads;
 159
 160   /* Current thread number; index into thread_data when m1threads != 0.  */
 161   int threadno;
 162
 163   /* When a new thread is created, it gets a unique number, which we
 164      count here.  */
 165   int max_threadid;
 166
 167   /* Thread-specific info, for simulator thread support, created at
 168      "clone" call.  Vector of [threads+1] when m1threads > 0.  */
 169   struct cris_thread_info *thread_data;
 170
 171   /* "If CLONE_SIGHAND is set, the calling process and the child pro-
 172      cesses share the same table of signal handlers." ... "However, the
 173      calling process and child processes still have distinct signal
 174      masks and sets of pending signals."  See struct cris_thread_info
 175      for sigmasks and sigpendings. */
 176   USI sighandler[64];
 177
 178   /* This is a hack to implement just the parts of fcntl F_GETFL that
 179      are used in open+fdopen calls for the standard scenario: for such
 180      a call we check that the last syscall was open, we check that the
 181      passed fd is the same returned then, and so we return the same
 182      flags passed to open.  This way, we avoid complicating the
 183      generic sim callback machinery by introducing fcntl
 184      mechanisms.  */
 185   USI last_syscall;
 186   USI last_open_fd;
 187   USI last_open_flags;
 188
 189   /* Function for initializing CPU thread context, which varies in size
 190      with each CPU model.  They should be in some constant parts or
 191      initialized in *_init_cpu, but we can't modify that for now.  */
 192   void* (*make_thread_cpu_data) (SIM_CPU *, void *);
 193   size_t thread_cpu_data_size;
 194
 195   /* CPU-model specific parts go here.
 196      Note that in files that don't need to access these pieces WANT_CPU_FOO
 197      won't be defined and thus these parts won't appear.  This is ok in the
 198      sense that things work.  It is a source of bugs though.
 199      One has to of course be careful to not take the size of this
 200      struct and no structure members accessed in non-cpu specific files can
 201      go after here.  */
 202 #if defined (WANT_CPU_CRISV0F)
 203   CRISV0F_CPU_DATA cpu_data;
 204 #elif defined (WANT_CPU_CRISV3F)
 205   CRISV3F_CPU_DATA cpu_data;
 206 #elif defined (WANT_CPU_CRISV8F)
 207   CRISV8F_CPU_DATA cpu_data;
 208 #elif defined (WANT_CPU_CRISV10F)
 209   CRISV10F_CPU_DATA cpu_data;
 210 #elif defined (WANT_CPU_CRISV32F)
 211   CRISV32F_CPU_DATA cpu_data;
 212 #else
 213   /* Let's assume all cpu_data have the same alignment requirements, so
 214      they all are laid out at the same address.  Since we can't get the
 215      exact definition, we also assume that it has no higher alignment
 216      requirements than a vector of, say, 16 pointers.  (A single member
 217      is often special-cased, and possibly two as well so we don't want
 218      that).  */
 219   union { void *dummy[16]; } cpu_data_placeholder;
 220 #endif
 221 };
 222 \f
 223 /* The sim_state struct.  */
 224
 225 struct sim_state {
 226   sim_cpu *cpu;
 227 #define STATE_CPU(sd, n) (/*&*/ (sd)->cpu)
 228
 229   CGEN_STATE cgen_state;
 230
 231   sim_state_base base;
 232 };
 233 \f
 234 /* Misc.  */
 235
 236 /* Catch address exceptions.  */
 237 extern SIM_CORE_SIGNAL_FN cris_core_signal;
 238 #define SIM_CORE_SIGNAL(SD,CPU,CIA,MAP,NR_BYTES,ADDR,TRANSFER,ERROR) \
 239 cris_core_signal ((SD), (CPU), (CIA), (MAP), (NR_BYTES), (ADDR), \
 240                   (TRANSFER), (ERROR))
 241
 242 /* Default memory size.  */
 243 #define CRIS_DEFAULT_MEM_SIZE 0x800000 /* 8M */
 244
 245 extern device cris_devices;
 246
 247 #endif /* SIM_MAIN_H */