1 |
/* |
2 |
* Cisco 7200 (Predator) simulation platform. |
3 |
* Copyright (c) 2005,2006 Christophe Fillot (cf@utc.fr) |
4 |
* |
5 |
* Management of CPU groups (for MP systems). |
6 |
*/ |
7 |
|
8 |
#define _GNU_SOURCE |
9 |
#include <stdio.h> |
10 |
#include <stdlib.h> |
11 |
#include <unistd.h> |
12 |
#include <string.h> |
13 |
#include <stdarg.h> |
14 |
#include <sys/types.h> |
15 |
#include <sys/stat.h> |
16 |
#include <sys/mman.h> |
17 |
#include <fcntl.h> |
18 |
#include <pthread.h> |
19 |
|
20 |
#include "mips64.h" |
21 |
#include "dynamips.h" |
22 |
#include "cpu.h" |
23 |
#include "memory.h" |
24 |
#include "device.h" |
25 |
#include "cp0.h" |
26 |
#include "mips64_exec.h" |
27 |
#include "vm.h" |
28 |
|
29 |
/* Find a CPU in a group given its ID */ |
30 |
cpu_mips_t *cpu_group_find_id(cpu_group_t *group,u_int id) |
31 |
{ |
32 |
cpu_mips_t *cpu; |
33 |
|
34 |
for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
35 |
if (cpu->id == id) |
36 |
return cpu; |
37 |
|
38 |
return NULL; |
39 |
} |
40 |
|
41 |
/* Find the highest CPU ID in a CPU group */ |
42 |
int cpu_group_find_highest_id(cpu_group_t *group,u_int *highest_id) |
43 |
{ |
44 |
cpu_mips_t *cpu; |
45 |
u_int max_id = 0; |
46 |
|
47 |
if (!group || group->cpu_list) |
48 |
return(-1); |
49 |
|
50 |
for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
51 |
if (cpu->id >= max_id) |
52 |
max_id = cpu->id; |
53 |
|
54 |
*highest_id = max_id; |
55 |
return(0); |
56 |
} |
57 |
|
58 |
/* Add a CPU in a CPU group */ |
59 |
int cpu_group_add(cpu_group_t *group,cpu_mips_t *cpu) |
60 |
{ |
61 |
/* check that we don't already have a CPU with this id */ |
62 |
if (cpu_group_find_id(group,cpu->id) != NULL) { |
63 |
fprintf(stderr,"cpu_group_add: CPU%u already present in group.\n", |
64 |
cpu->id); |
65 |
return(-1); |
66 |
} |
67 |
|
68 |
cpu->next = group->cpu_list; |
69 |
group->cpu_list = cpu; |
70 |
return(0); |
71 |
} |
72 |
|
73 |
/* Create a new CPU group */ |
74 |
cpu_group_t *cpu_group_create(char *name) |
75 |
{ |
76 |
cpu_group_t *group; |
77 |
|
78 |
if (!(group = malloc(sizeof(*group)))) |
79 |
return NULL; |
80 |
|
81 |
group->name = name; |
82 |
group->cpu_list = NULL; |
83 |
return group; |
84 |
} |
85 |
|
86 |
/* Delete a CPU group */ |
87 |
void cpu_group_delete(cpu_group_t *group) |
88 |
{ |
89 |
cpu_mips_t *cpu,*next; |
90 |
|
91 |
if (group != NULL) { |
92 |
for(cpu=group->cpu_list;cpu;cpu=next) { |
93 |
next = cpu->next; |
94 |
cpu_delete(cpu); |
95 |
} |
96 |
|
97 |
free(group); |
98 |
} |
99 |
} |
100 |
|
101 |
/* Rebuild the MTS subsystem for a CPU group */ |
102 |
int cpu_group_rebuild_mts(cpu_group_t *group) |
103 |
{ |
104 |
cpu_mips_t *cpu; |
105 |
|
106 |
for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
107 |
cpu->mts_rebuild(cpu); |
108 |
|
109 |
return(0); |
110 |
} |
111 |
|
112 |
/* Log a message for a CPU */ |
113 |
void cpu_log(cpu_mips_t *cpu,char *module,char *format,...) |
114 |
{ |
115 |
char buffer[256]; |
116 |
va_list ap; |
117 |
|
118 |
va_start(ap,format); |
119 |
snprintf(buffer,sizeof(buffer),"CPU%u: %s",cpu->id,module); |
120 |
vm_flog(cpu->vm,buffer,format,ap); |
121 |
va_end(ap); |
122 |
} |
123 |
|
124 |
/* Create a new CPU */ |
125 |
cpu_mips_t *cpu_create(vm_instance_t *vm,u_int id) |
126 |
{ |
127 |
void *(*cpu_run_fn)(void *); |
128 |
cpu_mips_t *cpu; |
129 |
|
130 |
if (!(cpu = malloc(sizeof(*cpu)))) |
131 |
return NULL; |
132 |
|
133 |
memset(cpu,0,sizeof(*cpu)); |
134 |
cpu->vm = vm; |
135 |
|
136 |
/* by default, use a standard initialization (CPU exec is suspended) */ |
137 |
mips64_init(cpu); |
138 |
cpu->id = id; |
139 |
cpu->state = MIPS_CPU_SUSPENDED; |
140 |
|
141 |
cpu_run_fn = (void *)insn_block_execute; |
142 |
#if __GNUC__ > 2 |
143 |
if (!cpu->vm->jit_use) { |
144 |
cpu_run_fn = (void *)mips64_exec_run_cpu; |
145 |
} else { |
146 |
mips64_jit_init(cpu); |
147 |
} |
148 |
#endif |
149 |
|
150 |
/* create the CPU thread execution */ |
151 |
if (pthread_create(&cpu->cpu_thread,NULL,cpu_run_fn,cpu) != 0) { |
152 |
fprintf(stderr,"cpu_create: unable to create thread for CPU%u\n",id); |
153 |
free(cpu); |
154 |
return NULL; |
155 |
} |
156 |
|
157 |
return cpu; |
158 |
} |
159 |
|
160 |
/* Delete a CPU */ |
161 |
void cpu_delete(cpu_mips_t *cpu) |
162 |
{ |
163 |
if (cpu) { |
164 |
/* Stop activity of this CPU */ |
165 |
cpu_stop(cpu); |
166 |
pthread_join(cpu->cpu_thread,NULL); |
167 |
|
168 |
/* Free resources */ |
169 |
mips64_delete(cpu); |
170 |
} |
171 |
} |
172 |
|
173 |
/* Start a CPU */ |
174 |
void cpu_start(cpu_mips_t *cpu) |
175 |
{ |
176 |
if (cpu) { |
177 |
cpu_log(cpu,"CPU_STATE","Starting CPU (old state=%u)...\n",cpu->state); |
178 |
cpu->state = MIPS_CPU_RUNNING; |
179 |
} |
180 |
} |
181 |
|
182 |
/* Stop a CPU */ |
183 |
void cpu_stop(cpu_mips_t *cpu) |
184 |
{ |
185 |
if (cpu) { |
186 |
cpu_log(cpu,"CPU_STATE","Halting CPU (old state=%u)...\n",cpu->state); |
187 |
cpu->state = MIPS_CPU_HALTED; |
188 |
} |
189 |
} |
190 |
|
191 |
/* Start all CPUs of a CPU group */ |
192 |
void cpu_group_start_all_cpu(cpu_group_t *group) |
193 |
{ |
194 |
cpu_mips_t *cpu; |
195 |
|
196 |
for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
197 |
cpu_start(cpu); |
198 |
} |
199 |
|
200 |
/* Stop all CPUs of a CPU group */ |
201 |
void cpu_group_stop_all_cpu(cpu_group_t *group) |
202 |
{ |
203 |
cpu_mips_t *cpu; |
204 |
|
205 |
for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
206 |
cpu_stop(cpu); |
207 |
} |
208 |
|
209 |
/* Set a state of all CPUs of a CPU group */ |
210 |
void cpu_group_set_state(cpu_group_t *group,u_int state) |
211 |
{ |
212 |
cpu_mips_t *cpu; |
213 |
|
214 |
for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
215 |
cpu->state = state; |
216 |
} |
217 |
|
218 |
/* Returns TRUE if all CPUs in a CPU group are inactive */ |
219 |
static int cpu_group_check_activity(cpu_group_t *group) |
220 |
{ |
221 |
cpu_mips_t *cpu; |
222 |
|
223 |
for(cpu=group->cpu_list;cpu;cpu=cpu->next) { |
224 |
if (!cpu->cpu_thread_running) |
225 |
continue; |
226 |
|
227 |
if ((cpu->state == MIPS_CPU_RUNNING) || !cpu->seq_state) |
228 |
return(FALSE); |
229 |
} |
230 |
|
231 |
return(TRUE); |
232 |
} |
233 |
|
234 |
/* Synchronize on CPUs (all CPUs must be inactive) */ |
235 |
int cpu_group_sync_state(cpu_group_t *group) |
236 |
{ |
237 |
cpu_mips_t *cpu; |
238 |
m_tmcnt_t t1,t2; |
239 |
|
240 |
/* Check that CPU activity is really suspended */ |
241 |
t1 = m_gettime(); |
242 |
|
243 |
for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
244 |
cpu->seq_state = 0; |
245 |
|
246 |
while(!cpu_group_check_activity(group)) { |
247 |
t2 = m_gettime(); |
248 |
|
249 |
if (t2 > (t1 + 10000)) |
250 |
return(-1); |
251 |
|
252 |
usleep(50000); |
253 |
} |
254 |
|
255 |
return(0); |
256 |
} |
257 |
|
258 |
/* Save state of all CPUs */ |
259 |
int cpu_group_save_state(cpu_group_t *group) |
260 |
{ |
261 |
cpu_mips_t *cpu; |
262 |
|
263 |
for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
264 |
cpu->prev_state = cpu->state; |
265 |
|
266 |
return(TRUE); |
267 |
} |
268 |
|
269 |
/* Restore state of all CPUs */ |
270 |
int cpu_group_restore_state(cpu_group_t *group) |
271 |
{ |
272 |
cpu_mips_t *cpu; |
273 |
|
274 |
for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
275 |
cpu->state = cpu->prev_state; |
276 |
|
277 |
return(TRUE); |
278 |
} |