1 /* This file is part of the program psim.
3 Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
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 2 of the License, or
8 (at your option) any later version.
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.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 #ifndef STATIC_INLINE_CPU
26 #define STATIC_INLINE_CPU STATIC_INLINE
47 /* current instruction address */
48 unsigned_word program_counter
;
51 core
*physical
; /* all of memory */
53 vm_instruction_map
*instruction_map
; /* instructions */
54 vm_data_map
*data_map
; /* data */
56 /* current state of interrupt inputs */
57 int external_exception_pending
;
59 /* the system this processor is contained within */
65 /* Current functional unit information */
66 function_unit
*func_unit
;
68 /* Current CPU model information */
69 model_data
*model_ptr
;
71 #if WITH_IDECODE_CACHE_SIZE
72 /* a cache to store cracked instructions */
73 idecode_cache icache
[WITH_IDECODE_CACHE_SIZE
];
76 /* address reservation: keep the physical address and the contents
77 of memory at that address */
78 memory_reservation reservation
;
80 /* offset from event time to this cpu's idea of the local time */
81 signed64 time_base_local_time
;
82 signed64 decrementer_local_time
;
83 event_entry_tag decrementer_event
;
89 cpu_create(psim
*system
,
95 cpu
*processor
= ZALLOC(cpu
);
97 /* create the virtual memory map from the core */
98 processor
->physical
= memory
;
99 processor
->virtual = vm_create(memory
);
100 processor
->instruction_map
= vm_create_instruction_map(processor
->virtual);
101 processor
->data_map
= vm_create_data_map(processor
->virtual);
102 processor
->model_ptr
= model_create (processor
);
104 /* link back to core system */
105 processor
->system
= system
;
106 processor
->events
= events
;
107 processor
->cpu_nr
= cpu_nr
;
108 processor
->monitor
= monitor
;
110 /* Create function unit if desired */
111 if (WITH_FUNCTION_UNIT
)
112 processor
->func_unit
= function_unit_create ();
119 cpu_init(cpu
*processor
)
121 memset(&processor
->regs
, 0, sizeof(processor
->regs
));
122 /* FIXME - should any of VM be inited also ? */
124 if (WITH_FUNCTION_UNIT
)
125 function_unit_init (processor
->func_unit
);
127 model_init (processor
, processor
->model_ptr
);
131 /* find ones way home */
134 cpu_system(cpu
*processor
)
136 return processor
->system
;
140 cpu_nr(cpu
*processor
)
142 return processor
->cpu_nr
;
145 INLINE_CPU event_queue
*
146 cpu_event_queue(cpu
*processor
)
148 return processor
->events
;
152 cpu_monitor(cpu
*processor
)
154 return processor
->monitor
;
157 INLINE_CPU function_unit
*
158 cpu_function_unit(cpu
*processor
)
160 return processor
->func_unit
;
163 INLINE_CPU model_data
*
164 cpu_model(cpu
*processor
)
166 return processor
->model_ptr
;
169 /* The processors local concept of time */
172 cpu_get_time_base(cpu
*processor
)
174 return (event_queue_time(processor
->events
)
175 - processor
->time_base_local_time
);
179 cpu_set_time_base(cpu
*processor
,
182 processor
->time_base_local_time
= (event_queue_time(processor
->events
)
187 cpu_get_decrementer(cpu
*processor
)
189 return (processor
->decrementer_local_time
190 - event_queue_time(processor
->events
));
193 STATIC_INLINE_CPU
void
194 cpu_decrement_event(event_queue
*queue
,
197 cpu
*processor
= (cpu
*)data
;
198 if (!decrementer_interrupt(processor
)) {
199 processor
->decrementer_event
= event_queue_schedule(processor
->events
,
207 cpu_set_decrementer(cpu
*processor
,
208 signed32 decrementer
)
210 signed64 old_decrementer
= (processor
->decrementer_local_time
211 - event_queue_time(processor
->events
));
212 event_queue_deschedule(processor
->events
, processor
->decrementer_event
);
213 processor
->decrementer_local_time
= (event_queue_time(processor
->events
)
215 if (decrementer
< 0 && old_decrementer
>= 0)
216 /* dec interrupt occures if the sign of the decrement reg is
217 changed by the load operation */
218 processor
->decrementer_event
= event_queue_schedule(processor
->events
,
222 else if (decrementer
>= 0)
223 processor
->decrementer_event
= event_queue_schedule(processor
->events
,
230 /* program counter manipulation */
233 cpu_set_program_counter(cpu
*processor
,
234 unsigned_word new_program_counter
)
236 processor
->program_counter
= new_program_counter
;
239 INLINE_CPU unsigned_word
240 cpu_get_program_counter(cpu
*processor
)
242 return processor
->program_counter
;
246 cpu_restart(cpu
*processor
,
249 processor
->program_counter
= nia
;
250 psim_restart(processor
->system
, processor
->cpu_nr
);
254 cpu_halt(cpu
*processor
,
259 if (processor
== NULL
) {
260 error("cpu_halt() processor=NULL, cia=0x%x, reason=%d, signal=%d\n",
266 if (WITH_FUNCTION_UNIT
)
267 function_unit_halt(processor
, processor
->func_unit
);
269 model_halt(processor
, processor
->model_ptr
);
270 processor
->program_counter
= cia
;
271 psim_halt(processor
->system
, processor
->cpu_nr
, cia
, reason
, signal
);
276 #if WITH_IDECODE_CACHE_SIZE
277 /* allow access to the cpu's instruction cache */
278 INLINE_CPU idecode_cache
*
279 cpu_icache_entry(cpu
*processor
,
282 return &processor
->icache
[cia
/ 4 % WITH_IDECODE_CACHE_SIZE
];
287 cpu_flush_icache(cpu
*processor
)
290 /* force all addresses to 0xff... so that they never hit */
291 for (i
= 0; i
< WITH_IDECODE_CACHE_SIZE
; i
++)
292 processor
->icache
[i
].address
= MASK(0, 63);
297 /* address map revelation */
299 INLINE_CPU vm_instruction_map
*
300 cpu_instruction_map(cpu
*processor
)
302 return processor
->instruction_map
;
305 INLINE_CPU vm_data_map
*
306 cpu_data_map(cpu
*processor
)
308 return processor
->data_map
;
312 /* reservation access */
314 INLINE_CPU memory_reservation
*
315 cpu_reservation(cpu
*processor
)
317 return &processor
->reservation
;
321 /* register access */
323 INLINE_CPU registers
*
324 cpu_registers(cpu
*processor
)
326 return &processor
->regs
;
330 cpu_synchronize_context(cpu
*processor
)
332 #if (WITH_IDECODE_CACHE)
333 /* kill of the cache */
334 cpu_flush_icache(processor
);
337 /* update virtual memory */
338 vm_synchronize_context(processor
->virtual,
341 processor
->regs
.msr
);
345 /* might again be useful one day */
348 cpu_print_info(cpu
*processor
, int verbose
)