| 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_ */ |