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188 lines
4.5 KiB
C
188 lines
4.5 KiB
C
/* This file is part of the program psim.
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Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _CPU_H_
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#define _CPU_H_
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#ifndef INLINE_CPU
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#define INLINE_CPU
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#endif
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#include "basics.h"
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#include "registers.h"
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#include "device_tree.h"
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#include "memory_map.h"
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#include "core.h"
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#include "vm.h"
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#include "events.h"
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#include "interrupts.h"
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#include "psim.h"
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#include "icache.h"
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/* typedef struct _cpu cpu;
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Declared in basics.h because it is used opaquely throughout the
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code */
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/* Create a cpu object */
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INLINE_CPU cpu *cpu_create
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(psim *system,
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core *memory,
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event_queue *events,
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int cpu_nr);
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/* Find our way home */
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INLINE_CPU psim *cpu_system
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(cpu *processor);
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INLINE_CPU int cpu_nr
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(cpu *processor);
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INLINE_CPU event_queue *cpu_event_queue
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(cpu *processor);
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/* The processors local concept of time */
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INLINE_CPU signed64 cpu_get_time_base
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(cpu *processor);
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INLINE_CPU void cpu_set_time_base
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(cpu *processor,
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signed64 time_base);
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INLINE_CPU signed32 cpu_get_decrementer
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(cpu *processor);
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INLINE_CPU void cpu_set_decrementer
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(cpu *processor,
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signed32 decrementer);
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/* manipulate the program counter
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The program counter is not included in the register file. Instead
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it is extracted and then later restored (set, reset, halt). This
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is to give the user of the cpu (and the compiler) the chance to
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minimize the need to load/store the cpu's PC value. (Especially in
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the case of a single processor) */
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INLINE_CPU void cpu_set_program_counter
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(cpu *processor,
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unsigned_word new_program_counter);
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INLINE_CPU unsigned_word cpu_get_program_counter
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(cpu *processor);
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INLINE_CPU void cpu_restart
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(cpu *processor,
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unsigned_word nia);
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INLINE_CPU void cpu_halt
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(cpu *processor,
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unsigned_word nia,
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stop_reason reason,
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int signal);
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#if WITH_IDECODE_CACHE
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/* gain acces to the processors instruction cracking cache
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Only useful (and visable) if we're cracking the cache */
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INLINE_CPU idecode_cache *cpu_icache
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(cpu *processor);
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#endif
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/* reveal the processor address maps
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At first sight it may seem better to, instead of exposing the cpu's
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inner vm maps, to have the cpu its self provide memory manipulation
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functions. (eg cpu_instruction_fetch() cpu_data_read_4())
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Unfortunatly in addition to these functions is the need (for the
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debugger) to be able to read/write to memory in ways that violate
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the vm protection (eg store breakpoint instruction in the
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instruction map). */
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INLINE_CPU vm_instruction_map *cpu_instruction_map
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(cpu *processor);
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INLINE_CPU vm_data_map *cpu_data_map
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(cpu *processor);
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INLINE_CPU core *cpu_core
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(cpu *processor);
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/* grant access to the reservation information */
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typedef struct _memory_reservation {
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int valid;
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unsigned_word addr;
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unsigned_word data;
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} memory_reservation;
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INLINE_CPU memory_reservation *cpu_reservation
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(cpu *processor);
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INLINE_CPU void cpu_increment_number_of_insns
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(cpu *processor);
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INLINE_CPU long cpu_get_number_of_insns
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(cpu *processor);
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INLINE_CPU void cpu_print_info
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(cpu *processor,
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int verbose);
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/* Registers:
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This model exploits the PowerPC's requirement for a synchronization
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to occure after (or before) the update of any context controlling
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register. All context sync points must call the sync function
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below to when ever a synchronization point is reached */
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INLINE_CPU registers *cpu_registers
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(cpu *processor);
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INLINE_CPU void cpu_synchronize_context
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(cpu *processor);
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#define IS_PROBLEM_STATE(PROCESSOR) \
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(CURRENT_ENVIRONMENT == VIRTUAL_ENVIRONMENT \
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|| (cpu_registers(PROCESSOR)->msr & msr_problem_state))
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#define IS_64BIT_MODE(PROCESSOR) \
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((CURRENT_ENVIRONMENT == VIRTUAL_ENVIRONMENT && WITH_64BIT_TARGET) \
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|| (cpu_registers(PROCESSOR)->msr & msr_64bit_mode))
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#define IS_FP_AVAILABLE(PROCESSOR) \
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(CURRENT_ENVIRONMENT == VIRTUAL_ENVIRONMENT \
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|| (cpu_registers(PROCESSOR)->msr & msr_floating_point_available))
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#endif
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