1 /* CPU support.
2 Copyright (C) 1998-2024 Free Software Foundation, Inc.
3 Contributed by Cygnus Solutions.
4
5 This file is part of GDB, the GNU debugger.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20 /* This must come before any other includes. */
21 #include "defs.h"
22
23 #include <stdlib.h>
24
25 #include "bfd.h"
26
27 #include "sim-main.h"
28
29 /* Allocate space for all cpus in the simulator.
30 Space for the cpu must currently exist prior to parsing ARGV. */
31 /* ??? wip. better solution must wait. */
32
33 SIM_RC
sim_cpu_alloc_all_extra(SIM_DESC sd,int ncpus,size_t extra_bytes)34 sim_cpu_alloc_all_extra (SIM_DESC sd, int ncpus, size_t extra_bytes)
35 {
36 int c;
37
38 /* TODO: This should be a command line option for users to control. */
39 if (ncpus == 0)
40 ncpus = MAX_NR_PROCESSORS;
41
42 for (c = 0; c < ncpus; ++c)
43 STATE_CPU (sd, c) = sim_cpu_alloc_extra (sd, extra_bytes);
44
45 return SIM_RC_OK;
46 }
47
48 /* Allocate space for a cpu object.
49 EXTRA_BYTES is additional space to allocate for the sim_cpu struct. */
50
51 sim_cpu *
sim_cpu_alloc_extra(SIM_DESC sd,size_t extra_bytes)52 sim_cpu_alloc_extra (SIM_DESC sd, size_t extra_bytes)
53 {
54 sim_cpu *cpu = zalloc (sizeof (*cpu));
55
56 #ifndef CGEN_ARCH
57 # define cgen_cpu_max_extra_bytes(sd) 0
58 #endif
59 extra_bytes += cgen_cpu_max_extra_bytes (sd);
60 if (extra_bytes)
61 CPU_ARCH_DATA (cpu) = zalloc (extra_bytes);
62
63 return cpu;
64 }
65
66 /* Free all resources held by all cpus. */
67
68 void
sim_cpu_free_all(SIM_DESC sd)69 sim_cpu_free_all (SIM_DESC sd)
70 {
71 int c;
72
73 for (c = 0; c < MAX_NR_PROCESSORS; ++c)
74 if (STATE_CPU (sd, c))
75 sim_cpu_free (STATE_CPU (sd, c));
76 }
77
78 /* Free all resources used by CPU. */
79
80 void
sim_cpu_free(sim_cpu * cpu)81 sim_cpu_free (sim_cpu *cpu)
82 {
83 free (CPU_ARCH_DATA (cpu));
84 free (cpu);
85 }
86
87 /* PC utilities. */
88
89 sim_cia
sim_pc_get(sim_cpu * cpu)90 sim_pc_get (sim_cpu *cpu)
91 {
92 return (* CPU_PC_FETCH (cpu)) (cpu);
93 }
94
95 void
sim_pc_set(sim_cpu * cpu,sim_cia newval)96 sim_pc_set (sim_cpu *cpu, sim_cia newval)
97 {
98 (* CPU_PC_STORE (cpu)) (cpu, newval);
99 }
100