sim/cris/sim-main.h

   1 /* Main header for the CRIS simulator, based on the m32r header.
   2    Copyright (C) 2004-2015 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 3 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
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* All FIXME:s present in m32r apply here too; I just refuse to blindly
  21    carry them over, as I don't know if they're really things that need
  22    fixing.  */
  23
  24 #ifndef SIM_MAIN_H
  25 #define SIM_MAIN_H
  26
  27 #include "symcat.h"
  28 #include "sim-basics.h"
  29 #include "cgen-types.h"
  30 #include "cris-desc.h"
  31 #include "cris-opc.h"
  32 #include "arch.h"
  33
  34 #define SIM_ENGINE_HALT_HOOK(sd, cpu, cia) \
  35 do { \
  36   if (cpu) /* Null if ctrl-c.  */ \
  37     sim_pc_set ((cpu), (cia)); \
  38 } while (0)
  39 #define SIM_ENGINE_RESTART_HOOK(sd, cpu, cia) \
  40 do { \
  41   sim_pc_set ((cpu), (cia)); \
  42 } while (0)
  43
  44 #include "sim-base.h"
  45 #include "cgen-sim.h"
  46 #include "cris-sim.h"
  47 \f
  48 struct cris_sim_mmapped_page {
  49   USI addr;
  50   struct cris_sim_mmapped_page *prev;
  51 };
  52
  53 struct cris_thread_info {
  54   /* Identifier for this thread.  */
  55   unsigned int threadid;
  56
  57   /* Identifier for parent thread.  */
  58   unsigned int parent_threadid;
  59
  60   /* Signal to send to parent at exit.  */
  61   int exitsig;
  62
  63   /* Exit status.  */
  64   int exitval;
  65
  66   /* Only as storage to return the "set" value to the "get" method.
  67      I'm not sure whether this is useful per-thread.  */
  68   USI priority;
  69
  70   struct
  71   {
  72     USI altstack;
  73     USI options;
  74
  75     char action;
  76     char pending;
  77     char blocked;
  78     char blocked_suspendsave;
  79     /* The handler stub unblocks the signal, so we don't need a separate
  80        "temporary save" for that.  */
  81   } sigdata[64];
  82
  83   /* Register context, swapped with _sim_cpu.cpu_data.  */
  84   void *cpu_context;
  85
  86   /* Similar, temporary copy for the state at a signal call.   */
  87   void *cpu_context_atsignal;
  88
  89   /* The number of the reading and writing ends of a pipe if waiting for
  90      the reader, else 0.  */
  91   int pipe_read_fd;
  92   int pipe_write_fd;
  93
  94   /* System time at last context switch when this thread ran.  */
  95   USI last_execution;
  96
  97   /* Nonzero if we just executed a syscall.  */
  98   char at_syscall;
  99
 100   /* Nonzero if any of sigaction[0..64].pending is true.  */
 101   char sigpending;
 102
 103   /* Nonzero if in (rt_)sigsuspend call.  Cleared at every sighandler
 104      call.  */
 105   char sigsuspended;
 106 };
 107
 108 typedef int (*cris_interrupt_delivery_fn) (SIM_CPU *,
 109                                            enum cris_interrupt_type,
 110                                            unsigned int);
 111
 112 struct _sim_cpu {
 113   /* sim/common cpu base.  */
 114   sim_cpu_base base;
 115
 116   /* Static parts of cgen.  */
 117   CGEN_CPU cgen_cpu;
 118
 119   CRIS_MISC_PROFILE cris_misc_profile;
 120 #define CPU_CRIS_MISC_PROFILE(cpu) (& (cpu)->cris_misc_profile)
 121
 122   /* Copy of previous data; only valid when emitting trace-data after
 123      each insn.  */
 124   CRIS_MISC_PROFILE cris_prev_misc_profile;
 125 #define CPU_CRIS_PREV_MISC_PROFILE(cpu) (& (cpu)->cris_prev_misc_profile)
 126
 127 #if WITH_HW
 128   cris_interrupt_delivery_fn deliver_interrupt;
 129 #define CPU_CRIS_DELIVER_INTERRUPT(cpu) (cpu->deliver_interrupt)
 130 #endif
 131
 132   /* Simulator environment data.  */
 133   USI endmem;
 134   USI endbrk;
 135   USI stack_low;
 136   struct cris_sim_mmapped_page *highest_mmapped_page;
 137
 138   /* Number of syscalls performed or in progress, counting once extra
 139      for every time a blocked thread (internally, when threading) polls
 140      the (pipe) blockage.  By default, this is also a time counter: to
 141      minimize performance noise from minor compiler changes,
 142      instructions take no time and syscalls always take 1ms.  */
 143   USI syscalls;
 144
 145   /* Number of execution contexts minus one.  */
 146   int m1threads;
 147
 148   /* Current thread number; index into thread_data when m1threads != 0.  */
 149   int threadno;
 150
 151   /* When a new thread is created, it gets a unique number, which we
 152      count here.  */
 153   int max_threadid;
 154
 155   /* Thread-specific info, for simulator thread support, created at
 156      "clone" call.  Vector of [threads+1] when m1threads > 0.  */
 157   struct cris_thread_info *thread_data;
 158
 159   /* "If CLONE_SIGHAND is set, the calling process and the child pro-
 160      cesses share the same table of signal handlers." ... "However, the
 161      calling process and child processes still have distinct signal
 162      masks and sets of pending signals."  See struct cris_thread_info
 163      for sigmasks and sigpendings. */
 164   USI sighandler[64];
 165
 166   /* This is a hack to implement just the parts of fcntl F_GETFL that
 167      are used in open+fdopen calls for the standard scenario: for such
 168      a call we check that the last syscall was open, we check that the
 169      passed fd is the same returned then, and so we return the same
 170      flags passed to open.  This way, we avoid complicating the
 171      generic sim callback machinery by introducing fcntl
 172      mechanisms.  */
 173   USI last_syscall;
 174   USI last_open_fd;
 175   USI last_open_flags;
 176
 177   /* Function for initializing CPU thread context, which varies in size
 178      with each CPU model.  They should be in some constant parts or
 179      initialized in *_init_cpu, but we can't modify that for now.  */
 180   void* (*make_thread_cpu_data) (SIM_CPU *, void *);
 181   size_t thread_cpu_data_size;
 182
 183   /* The register differs, so we dispatch to a CPU-specific function.  */
 184   void (*set_target_thread_data) (SIM_CPU *, USI);
 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[MAX_NR_PROCESSORS];
 218
 219   CGEN_STATE cgen_state;
 220
 221   sim_state_base base;
 222 };
 223 \f
 224 /* Misc.  */
 225
 226 /* Catch address exceptions.  */
 227 extern SIM_CORE_SIGNAL_FN cris_core_signal;
 228 #define SIM_CORE_SIGNAL(SD,CPU,CIA,MAP,NR_BYTES,ADDR,TRANSFER,ERROR) \
 229 cris_core_signal ((SD), (CPU), (CIA), (MAP), (NR_BYTES), (ADDR), \
 230                   (TRANSFER), (ERROR))
 231
 232 /* Default memory size.  */
 233 #define CRIS_DEFAULT_MEM_SIZE 0x800000 /* 8M */
 234
 235 extern device cris_devices;
 236
 237 #endif /* SIM_MAIN_H */