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 3 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, see <http://www.gnu.org/licenses/>.
  17
  18     */
  19
  20
  21 #ifndef _EMUL_GENERIC_C_
  22 #define _EMUL_GENERIC_C_
  23
  24 #include "emul_generic.h"
  25
  26 #ifndef STATIC_INLINE_EMUL_GENERIC
  27 #define STATIC_INLINE_EMUL_GENERIC STATIC_INLINE
  28 #endif
  29
  30
  31 STATIC_INLINE_EMUL_GENERIC void
  32 emul_syscall_enter(emul_syscall *emul,
  33                    int call,
  34                    int arg0,
  35                    cpu *processor,
  36                    unsigned_word cia)
  37 {
  38   printf_filtered("%d:0x%lx:%s(",
  39                   cpu_nr(processor) + 1,
  40                   (long)cia,
  41                   emul->syscall_descriptor[call].name);
  42 }
  43
  44
  45 STATIC_INLINE_EMUL_GENERIC void
  46 emul_syscall_exit(emul_syscall *emul,
  47                   int call,
  48                   int arg0,
  49                   cpu *processor,
  50                   unsigned_word cia)
  51 {
  52   int status = cpu_registers(processor)->gpr[3];
  53   int error = cpu_registers(processor)->gpr[0];
  54   printf_filtered(")=%d", status);
  55   if (error > 0 && error < emul->nr_error_names)
  56     printf_filtered("[%s]", emul->error_names[error]);
  57   printf_filtered("\n");
  58 }
  59
  60
  61 INLINE_EMUL_GENERIC unsigned64
  62 emul_read_gpr64(cpu *processor,
  63                 int g)
  64 {
  65   unsigned32 hi;
  66   unsigned32 lo;
  67   if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
  68     hi = cpu_registers(processor)->gpr[g];
  69     lo = cpu_registers(processor)->gpr[g+1];
  70   }
  71   else {
  72     lo = cpu_registers(processor)->gpr[g];
  73     hi = cpu_registers(processor)->gpr[g+1];
  74   }
  75   return (INSERTED64(hi, 0, 31) | INSERTED64(lo, 32, 63));
  76 }
  77
  78
  79 INLINE_EMUL_GENERIC void
  80 emul_write_gpr64(cpu *processor,
  81                  int g,
  82                  unsigned64 val)
  83 {
  84   unsigned32 hi = EXTRACTED64(val, 0, 31);
  85   unsigned32 lo = EXTRACTED64(val, 32, 63);
  86   if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
  87     cpu_registers(processor)->gpr[g] = hi;
  88     cpu_registers(processor)->gpr[g+1] = lo;
  89   }
  90   else {
  91     cpu_registers(processor)->gpr[g] = lo;
  92     cpu_registers(processor)->gpr[g+1] = hi;
  93   }
  94 }
  95
  96
  97 INLINE_EMUL_GENERIC char *
  98 emul_read_string(char *dest,
  99                  unsigned_word addr,
 100                  unsigned nr_bytes,
 101                  cpu *processor,
 102                  unsigned_word cia)
 103 {
 104   unsigned nr_moved = 0;
 105   if (addr == 0)
 106     return NULL;
 107   while (1) {
 108     dest[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
 109                                         addr + nr_moved,
 110                                         processor, cia);
 111     if (dest[nr_moved] == '\0' || nr_moved >= nr_bytes)
 112       break;
 113     nr_moved++;
 114   }
 115   dest[nr_moved] = '\0';
 116   return dest;
 117 }
 118
 119
 120 INLINE_EMUL_GENERIC void
 121 emul_write_status(cpu *processor,
 122                   int status,
 123                   int errno)
 124 {
 125   if (status == -1 && errno != 0) {
 126     cpu_registers(processor)->gpr[3] = errno;
 127     CR_SET(0, cr_i_summary_overflow);
 128   }
 129   else {
 130     cpu_registers(processor)->gpr[3] = status;
 131     CR_SET(0, 0);
 132   }
 133 }
 134
 135
 136 INLINE_EMUL_GENERIC void
 137 emul_write2_status(cpu *processor,
 138                    int status1,
 139                    int status2,
 140                    int errno)
 141 {
 142   if (status1 == -1 && errno != 0) {
 143     cpu_registers(processor)->gpr[3] = errno;
 144     CR_SET(0, cr_i_summary_overflow);
 145   }
 146   else {
 147     cpu_registers(processor)->gpr[3] = status1;
 148     cpu_registers(processor)->gpr[4] = status2;
 149     CR_SET(0, 0);
 150   }
 151 }
 152
 153
 154 INLINE_EMUL_GENERIC unsigned_word
 155 emul_read_word(unsigned_word addr,
 156                cpu *processor,
 157                unsigned_word cia)
 158 {
 159   return vm_data_map_read_word(cpu_data_map(processor),
 160                                addr,
 161                                processor, cia);
 162 }
 163
 164
 165 INLINE_EMUL_GENERIC void
 166 emul_write_word(unsigned_word addr,
 167                 unsigned_word buf,
 168                 cpu *processor,
 169                 unsigned_word cia)
 170 {
 171   vm_data_map_write_word(cpu_data_map(processor),
 172                          addr,
 173                          buf,
 174                          processor, cia);
 175 }
 176
 177
 178 INLINE_EMUL_GENERIC void
 179 emul_write_buffer(const void *source,
 180                   unsigned_word addr,
 181                   unsigned nr_bytes,
 182                   cpu *processor,
 183                   unsigned_word cia)
 184 {
 185   int nr_moved;
 186   for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
 187     vm_data_map_write_1(cpu_data_map(processor),
 188                         addr + nr_moved,
 189                         ((const char*)source)[nr_moved],
 190                         processor, cia);
 191   }
 192 }
 193
 194
 195 INLINE_EMUL_GENERIC void
 196 emul_read_buffer(void *dest,
 197                  unsigned_word addr,
 198                  unsigned nr_bytes,
 199                  cpu *processor,
 200                  unsigned_word cia)
 201 {
 202   int nr_moved;
 203   for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
 204     ((char*)dest)[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
 205                                                  addr + nr_moved,
 206                                                  processor, cia);
 207   }
 208 }
 209
 210
 211 INLINE_EMUL_GENERIC void
 212 emul_do_system_call(os_emul_data *emul_data,
 213                     emul_syscall *emul,
 214                     unsigned call,
 215                     const int arg0,
 216                     cpu *processor,
 217                     unsigned_word cia)
 218 {
 219   emul_syscall_handler *handler = NULL;
 220   if (call >= emul->nr_system_calls)
 221     error("do_call() os_emul call %d out-of-range\n", call);
 222
 223   handler = emul->syscall_descriptor[call].handler;
 224   if (handler == NULL) {
 225     if (emul->syscall_descriptor[call].name) {
 226       error("do_call() unimplemented call %s\n", emul->syscall_descriptor[call].name);
 227     } else {
 228       error("do_call() unimplemented call %d\n", call);
 229     }
 230   }
 231
 232   if (WITH_TRACE && ppc_trace[trace_os_emul])
 233     emul_syscall_enter(emul, call, arg0, processor, cia);
 234
 235   cpu_registers(processor)->gpr[0] = 0; /* default success */
 236   handler(emul_data, call, arg0, processor, cia);
 237
 238   if (WITH_TRACE && ppc_trace[trace_os_emul])
 239     emul_syscall_exit(emul, call, arg0, processor, cia);
 240 }
 241
 242
 243 /* default size for the first bank of memory */
 244
 245 #ifndef OEA_MEMORY_SIZE
 246 #define OEA_MEMORY_SIZE 0x100000
 247 #endif
 248
 249
 250 /* Add options to the device tree */
 251
 252 INLINE_EMUL_GENERIC void
 253 emul_add_tree_options(device *tree,
 254                       bfd *image,
 255                       const char *emul,
 256                       const char *env,
 257                       int oea_interrupt_prefix)
 258 {
 259   int little_endian = 0;
 260
 261   /* sort out little endian */
 262   if (tree_find_property(tree, "/options/little-endian?"))
 263     little_endian = tree_find_boolean_property(tree, "/options/little-endian?");
 264   else {
 265 #ifdef bfd_little_endian        /* new bfd */
 266     little_endian = (image != NULL && bfd_little_endian(image));
 267 #else
 268     little_endian = (image != NULL &&
 269                      !image->xvec->byteorder_big_p);
 270 #endif
 271     tree_parse(tree, "/options/little-endian? %s",
 272                little_endian ? "true" : "false");
 273   }
 274
 275   /* misc other stuff */
 276   tree_parse(tree, "/openprom/options/oea-memory-size 0x%x",
 277              OEA_MEMORY_SIZE);
 278   tree_parse(tree, "/openprom/options/oea-interrupt-prefix %d",
 279              oea_interrupt_prefix);
 280   tree_parse(tree, "/openprom/options/smp 1");
 281   tree_parse(tree, "/openprom/options/env %s", env);
 282   tree_parse(tree, "/openprom/options/os-emul %s", emul);
 283   tree_parse(tree, "/openprom/options/strict-alignment? %s",
 284              (WITH_ALIGNMENT == STRICT_ALIGNMENT)
 285              ? "true" : "false");
 286   tree_parse(tree, "/openprom/options/floating-point? %s",
 287              WITH_FLOATING_POINT ? "true" : "false");
 288   tree_parse(tree, "/openprom/options/use-stdio? %s",
 289              ((WITH_STDIO == DO_USE_STDIO
 290                || WITH_STDIO == 0)
 291               ? "true" : "false"));
 292   tree_parse(tree, "/openprom/options/model \"%s",
 293              model_name[WITH_DEFAULT_MODEL]);
 294   tree_parse(tree, "/openprom/options/model-issue %d",
 295              MODEL_ISSUE_IGNORE);
 296
 297   /* useful options */
 298 }
 299
 300 INLINE_EMUL_GENERIC void
 301 emul_add_tree_hardware(device *root)
 302 {
 303   int i;
 304   int nr_cpus = tree_find_integer_property(root, "/openprom/options/smp");
 305
 306   /* sanity check the number of processors */
 307   if (nr_cpus > MAX_NR_PROCESSORS)
 308     error("Specified number of processors (%d) exceeds the number configured (%d).\n",
 309           nr_cpus, MAX_NR_PROCESSORS);
 310
 311   /* set the number of address cells (1 or 2) */
 312   tree_parse(root, "#address-cells %d", WITH_TARGET_WORD_BITSIZE / 32);
 313
 314   /* add some memory */
 315   if (tree_find_device(root, "/memory") == NULL) {
 316     unsigned_word memory_size =
 317       tree_find_integer_property(root, "/openprom/options/oea-memory-size");
 318     const unsigned_word avail_start = 0x3000;
 319     tree_parse(root, "/memory@0/reg 0x0 0x%lx",
 320                (unsigned long)memory_size);
 321     /* reserve the first 0x3000 for the PowerPC interrupt table */
 322     tree_parse(root, "/memory@0/available 0x%lx  0x%lx",
 323                (unsigned long)avail_start,
 324                (unsigned long)memory_size - avail_start);
 325   }
 326
 327   /* our processors */
 328   for (i = 0; i < nr_cpus; i++) {
 329     tree_parse(root, "/cpus/cpu@%d/cpu-nr %d", i, i);
 330   }
 331
 332   /* the debugging pal - hide it in the openprom and don't attach it
 333      to any bus */
 334   tree_parse(root, "/openprom/pal");
 335
 336   /* chosen etc */
 337   tree_parse(root, "/chosen/stdin */openprom/pal");
 338   tree_parse(root, "/chosen/stdout !/chosen/stdin");
 339   tree_parse(root, "/chosen/memory */memory");
 340 }
 341
 342 #endif /* _EMUL_GENERIC_C_ */