sim/ppc/cpu.h

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19     */
  20
  21
  22 #ifndef _CPU_H_
  23 #define _CPU_H_
  24
  25 #include "basics.h"
  26 #include "registers.h"
  27 #include "device.h"
  28 #include "corefile.h"
  29 #include "vm.h"
  30 #include "events.h"
  31 #include "interrupts.h"
  32 #include "psim.h"
  33 #include "idecode.h"
  34 #include "itable.h"
  35 #include "os_emul.h"
  36 #include "mon.h"
  37 #include "model.h"
  38
  39 #ifndef CONST_ATTRIBUTE
  40 #define CONST_ATTRIBUTE __attribute__((__const__))
  41 #endif
  42
  43 /* typedef struct _cpu cpu;
  44
  45    Declared in basics.h because it is used opaquely throughout the
  46    code */
  47
  48
  49 /* Create a cpu object */
  50
  51 INLINE_CPU\
  52 (cpu *) cpu_create
  53 (psim *system,
  54  core *memory,
  55  cpu_mon *monitor,
  56  os_emul *cpu_emulation,
  57  int cpu_nr);
  58
  59 INLINE_CPU\
  60 (void) cpu_init
  61 (cpu *processor);
  62
  63 /* Find our way home */
  64
  65 INLINE_CPU\
  66 (psim *) cpu_system
  67 (cpu *processor) CONST_ATTRIBUTE;
  68
  69 INLINE_CPU\
  70 (cpu_mon *) cpu_monitor
  71 (cpu *processor) CONST_ATTRIBUTE;
  72
  73 INLINE_CPU\
  74 (os_emul *) cpu_os_emulation
  75 (cpu *processor);
  76
  77 INLINE_CPU\
  78 (int) cpu_nr
  79 (cpu *processor) CONST_ATTRIBUTE;
  80
  81
  82 /* manipulate the processors program counter and execution state.
  83
  84    The program counter is not included in the register file.  Instead
  85    it is extracted and then later restored (set, reset, halt).  This
  86    is to give the user of the cpu (and the compiler) the chance to
  87    minimize the need to load/store the cpu's PC value.  (Especially in
  88    the case of a single processor) */
  89
  90 INLINE_CPU\
  91 (void) cpu_set_program_counter
  92 (cpu *processor,
  93  unsigned_word new_program_counter);
  94
  95 INLINE_CPU\
  96 (unsigned_word) cpu_get_program_counter
  97 (cpu *processor);
  98
  99 INLINE_CPU\
 100 (void) cpu_restart
 101 (cpu *processor,
 102  unsigned_word nia);
 103
 104 INLINE_CPU\
 105 (void) cpu_halt
 106 (cpu *processor,
 107  unsigned_word nia,
 108  stop_reason reason,
 109  int signal);
 110
 111 EXTERN_CPU\
 112 (void) cpu_error
 113 (cpu *processor,
 114  unsigned_word cia,
 115  const char *fmt,
 116  ...) __attribute__ ((format (printf, 3, 4)));
 117
 118
 119 /* The processors local concept of time */
 120
 121 INLINE_CPU\
 122 (signed64) cpu_get_time_base
 123 (cpu *processor);
 124
 125 INLINE_CPU\
 126 (void) cpu_set_time_base
 127 (cpu *processor,
 128  signed64 time_base);
 129
 130 INLINE_CPU\
 131 (signed32) cpu_get_decrementer
 132 (cpu *processor);
 133
 134 INLINE_CPU\
 135 (void) cpu_set_decrementer
 136 (cpu *processor,
 137  signed32 decrementer);
 138
 139
 140 #if WITH_IDECODE_CACHE_SIZE
 141 /* Return the cache entry that matches the given CIA.  No guarentee
 142    that the cache entry actually contains the instruction for that
 143    address */
 144
 145 INLINE_CPU\
 146 (idecode_cache) *cpu_icache_entry
 147 (cpu *processor,
 148  unsigned_word cia);
 149
 150 INLINE_CPU\
 151 (void) cpu_flush_icache
 152 (cpu *processor);
 153 #endif
 154
 155
 156 /* reveal the processors VM:
 157
 158    At first sight it may seem better to, instead of exposing the cpu's
 159    inner vm maps, to have the cpu its self provide memory manipulation
 160    functions. (eg cpu_instruction_fetch() cpu_data_read_4())
 161
 162    Unfortunatly in addition to these functions is the need (for the
 163    debugger) to be able to read/write to memory in ways that violate
 164    the vm protection (eg store breakpoint instruction in the
 165    instruction map). */
 166
 167 INLINE_CPU\
 168 (vm_data_map *) cpu_data_map
 169 (cpu *processor);
 170
 171 INLINE_CPU\
 172 (vm_instruction_map *) cpu_instruction_map
 173 (cpu *processor);
 174
 175 INLINE_CPU\
 176 (void) cpu_page_tlb_invalidate_entry
 177 (cpu *processor,
 178  unsigned_word ea);
 179
 180 INLINE_CPU\
 181 (void) cpu_page_tlb_invalidate_all
 182 (cpu *processor);
 183
 184
 185 /* reveal the processors interrupt state */
 186
 187 INLINE_CPU\
 188 (interrupts *) cpu_interrupts
 189 (cpu *processor);
 190
 191
 192 /* grant access to the reservation information */
 193
 194 typedef struct _memory_reservation {
 195   int valid;
 196   unsigned_word addr;
 197   unsigned_word data;
 198 } memory_reservation;
 199
 200 INLINE_CPU\
 201 (memory_reservation *) cpu_reservation
 202 (cpu *processor);
 203
 204
 205 /* Registers:
 206
 207    This model exploits the PowerPC's requirement for a synchronization
 208    to occure after (or before) the update of any context controlling
 209    register.  All context sync points must call the sync function
 210    below to when ever a synchronization point is reached */
 211
 212 INLINE_CPU\
 213 (registers *) cpu_registers
 214 (cpu *processor) CONST_ATTRIBUTE;
 215
 216 INLINE_CPU\
 217 (void) cpu_synchronize_context
 218 (cpu *processor,
 219  unsigned_word cia);
 220
 221 #define IS_PROBLEM_STATE(PROCESSOR) \
 222 (CURRENT_ENVIRONMENT == OPERATING_ENVIRONMENT \
 223  ? (cpu_registers(PROCESSOR)->msr & msr_problem_state) \
 224  : 1)
 225
 226 #define IS_64BIT_MODE(PROCESSOR) \
 227 (WITH_TARGET_WORD_BITSIZE == 64 \
 228  ? (CURRENT_ENVIRONMENT == OPERATING_ENVIRONMENT \
 229     ? (cpu_registers(PROCESSOR)->msr & msr_64bit_mode) \
 230     : 1) \
 231  : 0)
 232
 233 #define IS_FP_AVAILABLE(PROCESSOR) \
 234 (CURRENT_ENVIRONMENT == OPERATING_ENVIRONMENT \
 235  ? (cpu_registers(PROCESSOR)->msr & msr_floating_point_available) \
 236  : 1)
 237
 238
 239
 240 INLINE_CPU\
 241 (void) cpu_print_info
 242 (cpu *processor,
 243  int verbose);
 244
 245 INLINE_CPU\
 246 (model_data *) cpu_model
 247 (cpu *processor) CONST_ATTRIBUTE;
 248
 249
 250 #if (CPU_INLINE & INCLUDE_MODULE)
 251 # include "cpu.c"
 252 #endif
 253
 254 #endif