gnu/dist/gdb6/sim/ppc/emul_generic.c

   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 _EMUL_GENERIC_C_
  23 #define _EMUL_GENERIC_C_
  24
  25 #include "emul_generic.h"
  26
  27 #ifndef STATIC_INLINE_EMUL_GENERIC
  28 #define STATIC_INLINE_EMUL_GENERIC STATIC_INLINE
  29 #endif
  30
  31
  32 STATIC_INLINE_EMUL_GENERIC void
  33 emul_syscall_enter(emul_syscall *emul,
  34                    int call,
  35                    int arg0,
  36                    cpu *processor,
  37                    unsigned_word cia)
  38 {
  39   printf_filtered("%d:0x%lx:%s(",
  40                   cpu_nr(processor) + 1,
  41                   (long)cia,
  42                   emul->syscall_descriptor[call].name);
  43 }
  44
  45
  46 STATIC_INLINE_EMUL_GENERIC void
  47 emul_syscall_exit(emul_syscall *emul,
  48                   int call,
  49                   int arg0,
  50                   cpu *processor,
  51                   unsigned_word cia)
  52 {
  53   int status = cpu_registers(processor)->gpr[3];
  54   int error = cpu_registers(processor)->gpr[0];
  55   printf_filtered(")=%d", status);
  56   if (error > 0 && error < emul->nr_error_names)
  57     printf_filtered("[%s]", emul->error_names[error]);
  58   printf_filtered("\n");
  59 }
  60
  61
  62 INLINE_EMUL_GENERIC unsigned64
  63 emul_read_gpr64(cpu *processor,
  64                 int g)
  65 {
  66   unsigned32 hi;
  67   unsigned32 lo;
  68   if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
  69     hi = cpu_registers(processor)->gpr[g];
  70     lo = cpu_registers(processor)->gpr[g+1];
  71   }
  72   else {
  73     lo = cpu_registers(processor)->gpr[g];
  74     hi = cpu_registers(processor)->gpr[g+1];
  75   }
  76   return (INSERTED64(hi, 0, 31) | INSERTED64(lo, 32, 63));
  77 }
  78
  79
  80 INLINE_EMUL_GENERIC void
  81 emul_write_gpr64(cpu *processor,
  82                  int g,
  83                  unsigned64 val)
  84 {
  85   unsigned32 hi = EXTRACTED64(val, 0, 31);
  86   unsigned32 lo = EXTRACTED64(val, 32, 63);
  87   if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
  88     cpu_registers(processor)->gpr[g] = hi;
  89     cpu_registers(processor)->gpr[g+1] = lo;
  90   }
  91   else {
  92     cpu_registers(processor)->gpr[g] = lo;
  93     cpu_registers(processor)->gpr[g+1] = hi;
  94   }
  95 }
  96
  97
  98 INLINE_EMUL_GENERIC char *
  99 emul_read_string(char *dest,
 100                  unsigned_word addr,
 101                  unsigned nr_bytes,
 102                  cpu *processor,
 103                  unsigned_word cia)
 104 {
 105   unsigned nr_moved = 0;
 106   if (addr == 0)
 107     return NULL;
 108   while (1) {
 109     dest[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
 110                                         addr + nr_moved,
 111                                         processor, cia);
 112     if (dest[nr_moved] == '\0' || nr_moved >= nr_bytes)
 113       break;
 114     nr_moved++;
 115   }
 116   dest[nr_moved] = '\0';
 117   return dest;
 118 }
 119
 120
 121 INLINE_EMUL_GENERIC void
 122 emul_write_status(cpu *processor,
 123                   int status,
 124                   int errno)
 125 {
 126   if (status == -1 && errno != 0) {
 127     cpu_registers(processor)->gpr[3] = errno;
 128     CR_SET(0, cr_i_summary_overflow);
 129   }
 130   else {
 131     cpu_registers(processor)->gpr[3] = status;
 132     CR_SET(0, 0);
 133   }
 134 }
 135
 136
 137 INLINE_EMUL_GENERIC void
 138 emul_write2_status(cpu *processor,
 139                    int status1,
 140                    int status2,
 141                    int errno)
 142 {
 143   if (status1 == -1 && errno != 0) {
 144     cpu_registers(processor)->gpr[3] = errno;
 145     CR_SET(0, cr_i_summary_overflow);
 146   }
 147   else {
 148     cpu_registers(processor)->gpr[3] = status1;
 149     cpu_registers(processor)->gpr[4] = status2;
 150     CR_SET(0, 0);
 151   }
 152 }
 153
 154
 155 INLINE_EMUL_GENERIC unsigned_word
 156 emul_read_word(unsigned_word addr,
 157                cpu *processor,
 158                unsigned_word cia)
 159 {
 160   return vm_data_map_read_word(cpu_data_map(processor),
 161                                addr,
 162                                processor, cia);
 163 }
 164
 165
 166 INLINE_EMUL_GENERIC void
 167 emul_write_word(unsigned_word addr,
 168                 unsigned_word buf,
 169                 cpu *processor,
 170                 unsigned_word cia)
 171 {
 172   vm_data_map_write_word(cpu_data_map(processor),
 173                          addr,
 174                          buf,
 175                          processor, cia);
 176 }
 177
 178
 179 INLINE_EMUL_GENERIC void
 180 emul_write_buffer(const void *source,
 181                   unsigned_word addr,
 182                   unsigned nr_bytes,
 183                   cpu *processor,
 184                   unsigned_word cia)
 185 {
 186   int nr_moved;
 187   for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
 188     vm_data_map_write_1(cpu_data_map(processor),
 189                         addr + nr_moved,
 190                         ((const char*)source)[nr_moved],
 191                         processor, cia);
 192   }
 193 }
 194
 195
 196 INLINE_EMUL_GENERIC void
 197 emul_read_buffer(void *dest,
 198                  unsigned_word addr,
 199                  unsigned nr_bytes,
 200                  cpu *processor,
 201                  unsigned_word cia)
 202 {
 203   int nr_moved;
 204   for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
 205     ((char*)dest)[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
 206                                                  addr + nr_moved,
 207                                                  processor, cia);
 208   }
 209 }
 210
 211
 212 INLINE_EMUL_GENERIC void
 213 emul_do_system_call(os_emul_data *emul_data,
 214                     emul_syscall *emul,
 215                     unsigned call,
 216                     const int arg0,
 217                     cpu *processor,
 218                     unsigned_word cia)
 219 {
 220   emul_syscall_handler *handler = NULL;
 221   if (call >= emul->nr_system_calls)
 222     error("do_call() os_emul call %d out-of-range\n", call);
 223
 224   handler = emul->syscall_descriptor[call].handler;
 225   if (handler == NULL) {
 226     if (emul->syscall_descriptor[call].name) {
 227       error("do_call() unimplemented call %s\n", emul->syscall_descriptor[call].name);
 228     } else {
 229       error("do_call() unimplemented call %d\n", call);
 230     }
 231   }
 232
 233   if (WITH_TRACE && ppc_trace[trace_os_emul])
 234     emul_syscall_enter(emul, call, arg0, processor, cia);
 235
 236   cpu_registers(processor)->gpr[0] = 0; /* default success */
 237   handler(emul_data, call, arg0, processor, cia);
 238
 239   if (WITH_TRACE && ppc_trace[trace_os_emul])
 240     emul_syscall_exit(emul, call, arg0, processor, cia);
 241 }
 242
 243
 244 /* default size for the first bank of memory */
 245
 246 #ifndef OEA_MEMORY_SIZE
 247 #define OEA_MEMORY_SIZE 0x100000
 248 #endif
 249
 250
 251 /* Add options to the device tree */
 252
 253 INLINE_EMUL_GENERIC void
 254 emul_add_tree_options(device *tree,
 255                       bfd *image,
 256                       const char *emul,
 257                       const char *env,
 258                       int oea_interrupt_prefix)
 259 {
 260   int little_endian = 0;
 261
 262   /* sort out little endian */
 263   if (tree_find_property(tree, "/options/little-endian?"))
 264     little_endian = tree_find_boolean_property(tree, "/options/little-endian?");
 265   else {
 266 #ifdef bfd_little_endian        /* new bfd */
 267     little_endian = (image != NULL && bfd_little_endian(image));
 268 #else
 269     little_endian = (image != NULL &&
 270                      !image->xvec->byteorder_big_p);
 271 #endif
 272     tree_parse(tree, "/options/little-endian? %s",
 273                little_endian ? "true" : "false");
 274   }
 275
 276   /* misc other stuff */
 277   tree_parse(tree, "/openprom/options/oea-memory-size 0x%x",
 278              OEA_MEMORY_SIZE);
 279   tree_parse(tree, "/openprom/options/oea-interrupt-prefix %d",
 280              oea_interrupt_prefix);
 281   tree_parse(tree, "/openprom/options/smp 1");
 282   tree_parse(tree, "/openprom/options/env %s", env);
 283   tree_parse(tree, "/openprom/options/os-emul %s", emul);
 284   tree_parse(tree, "/openprom/options/strict-alignment? %s",
 285              (WITH_ALIGNMENT == STRICT_ALIGNMENT)
 286              ? "true" : "false");
 287   tree_parse(tree, "/openprom/options/floating-point? %s",
 288              WITH_FLOATING_POINT ? "true" : "false");
 289   tree_parse(tree, "/openprom/options/use-stdio? %s",
 290              ((WITH_STDIO == DO_USE_STDIO
 291                || WITH_STDIO == 0)
 292               ? "true" : "false"));
 293   tree_parse(tree, "/openprom/options/model \"%s",
 294              model_name[WITH_DEFAULT_MODEL]);
 295   tree_parse(tree, "/openprom/options/model-issue %d",
 296              MODEL_ISSUE_IGNORE);
 297
 298   /* useful options */
 299 }
 300
 301 INLINE_EMUL_GENERIC void
 302 emul_add_tree_hardware(device *root)
 303 {
 304   int i;
 305   int nr_cpus = tree_find_integer_property(root, "/openprom/options/smp");
 306
 307   /* sanity check the number of processors */
 308   if (nr_cpus > MAX_NR_PROCESSORS)
 309     error("Specified number of processors (%d) exceeds the number configured (%d).\n",
 310           nr_cpus, MAX_NR_PROCESSORS);
 311
 312   /* set the number of address cells (1 or 2) */
 313   tree_parse(root, "#address-cells %d", WITH_TARGET_WORD_BITSIZE / 32);
 314
 315   /* add some memory */
 316   if (tree_find_device(root, "/memory") == NULL) {
 317     unsigned_word memory_size =
 318       tree_find_integer_property(root, "/openprom/options/oea-memory-size");
 319     const unsigned_word avail_start = 0x3000;
 320     tree_parse(root, "/memory@0/reg 0x0 0x%lx",
 321                (unsigned long)memory_size);
 322     /* reserve the first 0x3000 for the PowerPC interrupt table */
 323     tree_parse(root, "/memory@0/available 0x%lx  0x%lx",
 324                (unsigned long)avail_start,
 325                (unsigned long)memory_size - avail_start);
 326   }
 327
 328   /* our processors */
 329   for (i = 0; i < nr_cpus; i++) {
 330     tree_parse(root, "/cpus/cpu@%d/cpu-nr %d", i, i);
 331   }
 332
 333   /* the debugging pal - hide it in the openprom and don't attach it
 334      to any bus */
 335   tree_parse(root, "/openprom/pal");
 336
 337   /* chosen etc */
 338   tree_parse(root, "/chosen/stdin */openprom/pal");
 339   tree_parse(root, "/chosen/stdout !/chosen/stdin");
 340   tree_parse(root, "/chosen/memory */memory");
 341 }
 342
 343 #endif /* _EMUL_GENERIC_C_ */