1 /* Main simulator entry points specific to Lattice Mico32.
2 Contributed by Jon Beniston <jon@beniston.com>
4 Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "sim-options.h"
23 #include "libiberty.h"
30 static void free_state (SIM_DESC);
31 static void print_lm32_misc_cpu (SIM_CPU * cpu, int verbose);
32 static DECLARE_OPTION_HANDLER (lm32_option_handler);
36 OPTION_ENDIAN = OPTION_START,
39 /* GDB passes -E, even though it's fixed, so we have to handle it here. common code only handles it if SIM_HAVE_BIENDIAN is defined, which it isn't for lm32. */
40 static const OPTION lm32_options[] = {
41 {{"endian", required_argument, NULL, OPTION_ENDIAN},
42 'E', "big", "Set endianness",
44 {{NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL}
47 /* Records simulator descriptor so utilities like lm32_dump_regs can be
49 SIM_DESC current_state;
51 /* Cover function of sim_state_free to free the cpu buffers as well. */
54 free_state (SIM_DESC sd)
56 if (STATE_MODULES (sd) != NULL)
57 sim_module_uninstall (sd);
58 sim_cpu_free_all (sd);
62 /* Find memory range used by program. */
65 find_base (bfd *prog_bfd)
68 unsigned long base = ~(0UL);
72 for (s = prog_bfd->sections; s; s = s->next)
74 if ((strcmp (bfd_get_section_name (prog_bfd, s), ".boot") == 0)
75 || (strcmp (bfd_get_section_name (prog_bfd, s), ".text") == 0)
76 || (strcmp (bfd_get_section_name (prog_bfd, s), ".data") == 0)
77 || (strcmp (bfd_get_section_name (prog_bfd, s), ".bss") == 0))
81 base = bfd_get_section_vma (prog_bfd, s);
86 bfd_get_section_vma (prog_bfd,
87 s) < base ? bfd_get_section_vma (prog_bfd,
91 return base & ~(0xffffUL);
95 find_limit (bfd *prog_bfd)
97 struct bfd_symbol **asymbols;
102 symsize = bfd_get_symtab_upper_bound (prog_bfd);
105 asymbols = (asymbol **) xmalloc (symsize);
106 symbol_count = bfd_canonicalize_symtab (prog_bfd, asymbols);
107 if (symbol_count < 0)
110 for (s = 0; s < symbol_count; s++)
112 if (!strcmp (asymbols[s]->name, "_fstack"))
113 return (asymbols[s]->value + 65536) & ~(0xffffUL);
118 /* Handle lm32 specific options. */
121 lm32_option_handler (sd, cpu, opt, arg, is_command)
131 /* Create an instance of the simulator. */
134 sim_open (kind, callback, abfd, argv)
136 host_callback *callback;
140 SIM_DESC sd = sim_state_alloc (kind, callback);
143 unsigned long base, limit;
145 /* The cpu data is kept in a separately allocated chunk of memory. */
146 if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK)
152 if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
157 sim_add_option_table (sd, NULL, lm32_options);
159 /* getopt will print the error message so we just have to exit if this fails.
160 FIXME: Hmmm... in the case of gdb we need getopt to call
162 if (sim_parse_args (sd, argv) != SIM_RC_OK)
169 /* Allocate a handler for I/O devices
170 if no memory for that range has been allocated by the user.
171 All are allocated in one chunk to keep things from being
172 unnecessarily complicated. */
173 if (sim_core_read_buffer (sd, NULL, read_map, &c, LM32_DEVICE_ADDR, 1) == 0)
174 sim_core_attach (sd, NULL, 0 /*level */ ,
175 access_read_write, 0 /*space ??? */ ,
176 LM32_DEVICE_ADDR, LM32_DEVICE_LEN /*nr_bytes */ ,
178 &lm32_devices, NULL /*buffer */ );
181 /* check for/establish the reference program image. */
182 if (sim_analyze_program (sd,
183 (STATE_PROG_ARGV (sd) != NULL
184 ? *STATE_PROG_ARGV (sd)
185 : NULL), abfd) != SIM_RC_OK)
191 /* Check to see if memory exists at programs start address. */
192 if (sim_core_read_buffer (sd, NULL, read_map, &c, STATE_START_ADDR (sd), 1)
195 if (STATE_PROG_BFD (sd) != NULL)
197 /* It doesn't, so we should try to allocate enough memory to hold program. */
198 base = find_base (STATE_PROG_BFD (sd));
199 limit = find_limit (STATE_PROG_BFD (sd));
203 "Failed to find symbol _fstack in program. You must specify memory regions with --memory-region.\n");
207 /*sim_io_printf (sd, "Allocating memory at 0x%x size 0x%x\n", base, limit); */
208 sim_do_commandf (sd, "memory region 0x%x,0x%x", base, limit);
212 /* Establish any remaining configuration options. */
213 if (sim_config (sd) != SIM_RC_OK)
219 if (sim_post_argv_init (sd) != SIM_RC_OK)
225 /* Open a copy of the cpu descriptor table. */
228 lm32_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
230 for (i = 0; i < MAX_NR_PROCESSORS; ++i)
232 SIM_CPU *cpu = STATE_CPU (sd, i);
233 CPU_CPU_DESC (cpu) = cd;
234 CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
236 lm32_cgen_init_dis (cd);
239 /* Initialize various cgen things not done by common framework.
240 Must be done after lm32_cgen_cpu_open. */
243 /* Store in a global so things like lm32_dump_regs can be invoked
244 from the gdb command line. */
251 sim_close (sd, quitting)
255 lm32_cgen_cpu_close (CPU_CPU_DESC (STATE_CPU (sd, 0)));
256 sim_module_uninstall (sd);
260 sim_create_inferior (sd, abfd, argv, envp)
266 SIM_CPU *current_cpu = STATE_CPU (sd, 0);
270 addr = bfd_get_start_address (abfd);
273 sim_pc_set (current_cpu, addr);
276 STATE_ARGV (sd) = sim_copy_argv (argv);
277 STATE_ENVP (sd) = sim_copy_argv (envp);