1 /* The common simulator framework for GDB, the GNU Debugger. 2 3 Copyright 2002, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. 4 5 Contributed by Andrew Cagney and Red Hat. 6 7 This file is part of GDB. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 21 22 23 #ifndef SIM_CORE_H 24 #define SIM_CORE_H 25 26 27 /* core signals (error conditions) 28 Define SIM_CORE_SIGNAL to catch these signals - see sim-core.c for 29 details. */ 30 31 typedef enum { 32 sim_core_unmapped_signal, 33 sim_core_unaligned_signal, 34 nr_sim_core_signals, 35 } sim_core_signals; 36 37 /* Type of SIM_CORE_SIGNAL handler. */ 38 typedef void (SIM_CORE_SIGNAL_FN) 39 (SIM_DESC sd, sim_cpu *cpu, sim_cia cia, unsigned map, int nr_bytes, 40 address_word addr, transfer_type transfer, sim_core_signals sig); 41 42 extern SIM_CORE_SIGNAL_FN sim_core_signal; 43 44 45 /* basic types */ 46 47 typedef struct _sim_core_mapping sim_core_mapping; 48 struct _sim_core_mapping { 49 /* common */ 50 int level; 51 int space; 52 unsigned_word base; 53 unsigned_word bound; 54 unsigned_word nr_bytes; 55 unsigned mask; 56 /* memory map */ 57 void *free_buffer; 58 void *buffer; 59 /* callback map */ 60 #if (WITH_HW) 61 struct hw *device; 62 #else 63 device *device; 64 #endif 65 /* tracing */ 66 int trace; 67 /* growth */ 68 sim_core_mapping *next; 69 }; 70 71 typedef struct _sim_core_map sim_core_map; 72 struct _sim_core_map { 73 sim_core_mapping *first; 74 }; 75 76 77 typedef struct _sim_core_common { 78 sim_core_map map[nr_maps]; 79 } sim_core_common; 80 81 82 /* Main core structure */ 83 84 typedef struct _sim_core sim_core; 85 struct _sim_core { 86 sim_core_common common; 87 address_word byte_xor; /* apply xor universally */ 88 }; 89 90 91 /* Per CPU distributed component of the core. At present this is 92 mostly a clone of the global core data structure. */ 93 94 typedef struct _sim_cpu_core { 95 sim_core_common common; 96 address_word xor[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero-sized array */ 97 } sim_cpu_core; 98 99 100 /* Install the "core" module. */ 101 102 extern SIM_RC sim_core_install (SIM_DESC sd); 103 104 105 106 /* Create a memory region within the core. 107 108 CPU - when non NULL, specifes the single processor that the memory 109 space is to be attached to. (INIMPLEMENTED). 110 111 LEVEL - specifies the ordering of the memory region. Lower regions 112 are searched first. Within a level, memory regions can not 113 overlap. 114 115 MAPMASK - Bitmask specifying the memory maps that the region is to 116 be attached to. Typically the enums sim-basics.h:access_* are used. 117 118 ADDRESS_SPACE - For device regions, a MAP:ADDRESS pair is 119 translated into ADDRESS_SPACE:OFFSET before being passed to the 120 client device. 121 122 MODULO - when the simulator has been configured WITH_MODULO support 123 and is greater than zero, specifies that accesses to the region 124 [ADDR .. ADDR+NR_BYTES) should be mapped onto the sub region [ADDR 125 .. ADDR+MODULO). The modulo value must be a power of two. 126 127 DEVICE - When non NULL, indicates that this is a callback memory 128 space and specified device's memory callback handler should be 129 called. 130 131 OPTIONAL_BUFFER - when non NULL, specifies the buffer to use for 132 data read & written to the region. Normally a more efficient 133 internal structure is used. It is assumed that buffer is allocated 134 such that the byte alignmed of OPTIONAL_BUFFER matches ADDR vis 135 (OPTIONAL_BUFFER % 8) == (ADDR % 8)). It is defined to be a sub-optimal 136 hook that allows clients to do nasty things that the interface doesn't 137 accomodate. */ 138 139 extern void sim_core_attach 140 (SIM_DESC sd, 141 sim_cpu *cpu, 142 int level, 143 unsigned mapmask, 144 int address_space, 145 address_word addr, 146 address_word nr_bytes, 147 unsigned modulo, 148 #if (WITH_HW) 149 struct hw *client, 150 #else 151 device *client, 152 #endif 153 void *optional_buffer); 154 155 156 /* Delete a memory section within the core. 157 158 */ 159 160 extern void sim_core_detach 161 (SIM_DESC sd, 162 sim_cpu *cpu, 163 int level, 164 int address_space, 165 address_word addr); 166 167 168 /* Variable sized read/write 169 170 Transfer a variable sized block of raw data between the host and 171 target. Should any problems occur, the number of bytes 172 successfully transfered is returned. 173 174 No host/target byte endian conversion is performed. No xor-endian 175 conversion is performed. 176 177 If CPU argument, when non NULL, specifies the processor specific 178 address map that is to be used in the transfer. */ 179 180 181 extern unsigned sim_core_read_buffer 182 (SIM_DESC sd, 183 sim_cpu *cpu, 184 unsigned map, 185 void *buffer, 186 address_word addr, 187 unsigned nr_bytes); 188 189 extern unsigned sim_core_write_buffer 190 (SIM_DESC sd, 191 sim_cpu *cpu, 192 unsigned map, 193 const void *buffer, 194 address_word addr, 195 unsigned nr_bytes); 196 197 198 199 /* Configure the core's XOR endian transfer mode. Only applicable 200 when WITH_XOR_ENDIAN is enabled. 201 202 Targets suporting XOR endian, shall notify the core of any changes 203 in state via this call. 204 205 The CPU argument, when non NULL, specifes the single processor that 206 the xor-endian configuration is to be applied to. */ 207 208 extern void sim_core_set_xor 209 (SIM_DESC sd, 210 sim_cpu *cpu, 211 int is_xor); 212 213 214 /* XOR version of variable sized read/write. 215 216 Transfer a variable sized block of raw data between the host and 217 target. Should any problems occur, the number of bytes 218 successfully transfered is returned. 219 220 No host/target byte endian conversion is performed. If applicable 221 (WITH_XOR_ENDIAN and xor-endian set), xor-endian conversion *is* 222 performed. 223 224 If CPU argument, when non NULL, specifies the processor specific 225 address map that is to be used in the transfer. */ 226 227 extern unsigned sim_core_xor_read_buffer 228 (SIM_DESC sd, 229 sim_cpu *cpu, 230 unsigned map, 231 void *buffer, 232 address_word addr, 233 unsigned nr_bytes); 234 235 extern unsigned sim_core_xor_write_buffer 236 (SIM_DESC sd, 237 sim_cpu *cpu, 238 unsigned map, 239 const void *buffer, 240 address_word addr, 241 unsigned nr_bytes); 242 243 244 245 /* Fixed sized, processor oriented, read/write. 246 247 Transfer a fixed amout of memory between the host and target. The 248 data transfered is translated from/to host to/from target byte 249 order (including xor endian). Should the transfer fail, the 250 operation shall abort (no return). 251 252 ALIGNED assumes yhat the specified ADDRESS is correctly alligned 253 for an N byte transfer (no alignment checks are made). Passing an 254 incorrectly aligned ADDRESS is erroneous. 255 256 UNALIGNED checks/modifies the ADDRESS according to the requirements 257 of an N byte transfer. Action, as defined by WITH_ALIGNMENT, being 258 taken should the check fail. 259 260 MISSALIGNED transfers the data regardless. 261 262 Misaligned xor-endian accesses are broken into a sequence of 263 transfers each <= WITH_XOR_ENDIAN bytes */ 264 265 266 #define DECLARE_SIM_CORE_WRITE_N(ALIGNMENT,N,M) \ 267 INLINE_SIM_CORE\ 268 (void) sim_core_write_##ALIGNMENT##_##N \ 269 (sim_cpu *cpu, \ 270 sim_cia cia, \ 271 unsigned map, \ 272 address_word addr, \ 273 unsigned_##M val); 274 275 DECLARE_SIM_CORE_WRITE_N(aligned,1,1) 276 DECLARE_SIM_CORE_WRITE_N(aligned,2,2) 277 DECLARE_SIM_CORE_WRITE_N(aligned,4,4) 278 DECLARE_SIM_CORE_WRITE_N(aligned,8,8) 279 DECLARE_SIM_CORE_WRITE_N(aligned,16,16) 280 281 #define sim_core_write_unaligned_1 sim_core_write_aligned_1 282 DECLARE_SIM_CORE_WRITE_N(unaligned,2,2) 283 DECLARE_SIM_CORE_WRITE_N(unaligned,4,4) 284 DECLARE_SIM_CORE_WRITE_N(unaligned,8,8) 285 DECLARE_SIM_CORE_WRITE_N(unaligned,16,16) 286 287 DECLARE_SIM_CORE_WRITE_N(misaligned,3,4) 288 DECLARE_SIM_CORE_WRITE_N(misaligned,5,8) 289 DECLARE_SIM_CORE_WRITE_N(misaligned,6,8) 290 DECLARE_SIM_CORE_WRITE_N(misaligned,7,8) 291 292 #define sim_core_write_1 sim_core_write_aligned_1 293 #define sim_core_write_2 sim_core_write_aligned_2 294 #define sim_core_write_4 sim_core_write_aligned_4 295 #define sim_core_write_8 sim_core_write_aligned_8 296 #define sim_core_write_16 sim_core_write_aligned_16 297 298 #define sim_core_write_unaligned_word XCONCAT2(sim_core_write_unaligned_,WITH_TARGET_WORD_BITSIZE) 299 #define sim_core_write_aligned_word XCONCAT2(sim_core_write_aligned_,WITH_TARGET_WORD_BITSIZE) 300 #define sim_core_write_word XCONCAT2(sim_core_write_,WITH_TARGET_WORD_BITSIZE) 301 302 #undef DECLARE_SIM_CORE_WRITE_N 303 304 305 #define DECLARE_SIM_CORE_READ_N(ALIGNMENT,N,M) \ 306 INLINE_SIM_CORE\ 307 (unsigned_##M) sim_core_read_##ALIGNMENT##_##N \ 308 (sim_cpu *cpu, \ 309 sim_cia cia, \ 310 unsigned map, \ 311 address_word addr); 312 313 DECLARE_SIM_CORE_READ_N(aligned,1,1) 314 DECLARE_SIM_CORE_READ_N(aligned,2,2) 315 DECLARE_SIM_CORE_READ_N(aligned,4,4) 316 DECLARE_SIM_CORE_READ_N(aligned,8,8) 317 DECLARE_SIM_CORE_READ_N(aligned,16,16) 318 319 #define sim_core_read_unaligned_1 sim_core_read_aligned_1 320 DECLARE_SIM_CORE_READ_N(unaligned,2,2) 321 DECLARE_SIM_CORE_READ_N(unaligned,4,4) 322 DECLARE_SIM_CORE_READ_N(unaligned,8,8) 323 DECLARE_SIM_CORE_READ_N(unaligned,16,16) 324 325 DECLARE_SIM_CORE_READ_N(misaligned,3,4) 326 DECLARE_SIM_CORE_READ_N(misaligned,5,8) 327 DECLARE_SIM_CORE_READ_N(misaligned,6,8) 328 DECLARE_SIM_CORE_READ_N(misaligned,7,8) 329 330 331 #define sim_core_read_1 sim_core_read_aligned_1 332 #define sim_core_read_2 sim_core_read_aligned_2 333 #define sim_core_read_4 sim_core_read_aligned_4 334 #define sim_core_read_8 sim_core_read_aligned_8 335 #define sim_core_read_16 sim_core_read_aligned_16 336 337 #define sim_core_read_unaligned_word XCONCAT2(sim_core_read_unaligned_,WITH_TARGET_WORD_BITSIZE) 338 #define sim_core_read_aligned_word XCONCAT2(sim_core_read_aligned_,WITH_TARGET_WORD_BITSIZE) 339 #define sim_core_read_word XCONCAT2(sim_core_read_,WITH_TARGET_WORD_BITSIZE) 340 341 #undef DECLARE_SIM_CORE_READ_N 342 343 344 #if (WITH_DEVICES) 345 /* TODO: create sim/common/device.h */ 346 /* These are defined with each particular cpu. */ 347 void device_error (device *me, const char *message, ...) __attribute__((format (printf, 2, 3))); 348 int device_io_read_buffer(device *me, void *dest, int space, address_word addr, unsigned nr_bytes, SIM_DESC sd, sim_cpu *processor, sim_cia cia); 349 int device_io_write_buffer(device *me, const void *source, int space, address_word addr, unsigned nr_bytes, SIM_DESC sd, sim_cpu *processor, sim_cia cia); 350 #endif 351 352 353 #endif 354