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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.2/] [sim/] [ppc/] [cpu.c] - Rev 438
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/* This file is part of the program psim. Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _CPU_C_ #define _CPU_C_ #include <setjmp.h> #include "cpu.h" #include "idecode.h" #ifdef HAVE_STRING_H #include <string.h> #else #ifdef HAVE_STRINGS_H #include <strings.h> #endif #endif struct _cpu { /* the registers */ registers regs; /* current instruction address */ unsigned_word program_counter; /* the memory maps */ core *physical; /* all of memory */ vm *virtual; vm_instruction_map *instruction_map; /* instructions */ vm_data_map *data_map; /* data */ /* the system this processor is contained within */ cpu_mon *monitor; os_emul *os_emulation; psim *system; event_queue *events; int cpu_nr; /* Current CPU model information */ model_data *model_ptr; #if WITH_IDECODE_CACHE_SIZE /* a cache to store cracked instructions */ idecode_cache icache[WITH_IDECODE_CACHE_SIZE]; #endif /* any interrupt state */ interrupts ints; /* address reservation: keep the physical address and the contents of memory at that address */ memory_reservation reservation; /* offset from event time to this cpu's idea of the local time */ signed64 time_base_local_time; signed64 decrementer_local_time; event_entry_tag decrementer_event; }; INLINE_CPU\ (cpu *) cpu_create(psim *system, core *memory, cpu_mon *monitor, os_emul *os_emulation, int cpu_nr) { cpu *processor = ZALLOC(cpu); /* create the virtual memory map from the core */ processor->physical = memory; processor->virtual = vm_create(memory); processor->instruction_map = vm_create_instruction_map(processor->virtual); processor->data_map = vm_create_data_map(processor->virtual); if (CURRENT_MODEL_ISSUE > 0) processor->model_ptr = model_create (processor); /* link back to core system */ processor->system = system; processor->events = psim_event_queue(system); processor->cpu_nr = cpu_nr; processor->monitor = monitor; processor->os_emulation = os_emulation; return processor; } INLINE_CPU\ (void) cpu_init(cpu *processor) { memset(&processor->regs, 0, sizeof(processor->regs)); /* vm init is delayed until after the device tree has been init as the devices may further init the cpu */ if (CURRENT_MODEL_ISSUE > 0) model_init (processor->model_ptr); } /* find ones way home */ INLINE_CPU\ (psim *) cpu_system(cpu *processor) { return processor->system; } INLINE_CPU\ (int) cpu_nr(cpu *processor) { return processor->cpu_nr; } INLINE_CPU\ (cpu_mon *) cpu_monitor(cpu *processor) { return processor->monitor; } INLINE_CPU\ (os_emul *) cpu_os_emulation(cpu *processor) { return processor->os_emulation; } INLINE_CPU\ (model_data *) cpu_model(cpu *processor) { return processor->model_ptr; } /* program counter manipulation */ INLINE_CPU\ (void) cpu_set_program_counter(cpu *processor, unsigned_word new_program_counter) { processor->program_counter = new_program_counter; } INLINE_CPU\ (unsigned_word) cpu_get_program_counter(cpu *processor) { return processor->program_counter; } INLINE_CPU\ (void) cpu_restart(cpu *processor, unsigned_word nia) { ASSERT(processor != NULL); cpu_set_program_counter(processor, nia); psim_restart(processor->system, processor->cpu_nr); } INLINE_CPU\ (void) cpu_halt(cpu *processor, unsigned_word nia, stop_reason reason, int signal) { ASSERT(processor != NULL); if (CURRENT_MODEL_ISSUE > 0) model_halt(processor->model_ptr); cpu_set_program_counter(processor, nia); psim_halt(processor->system, processor->cpu_nr, reason, signal); } EXTERN_CPU\ (void) cpu_error(cpu *processor, unsigned_word cia, const char *fmt, ...) { char message[1024]; va_list ap; /* format the message */ va_start(ap, fmt); vsprintf(message, fmt, ap); va_end(ap); /* sanity check */ if (strlen(message) >= sizeof(message)) error("cpu_error: buffer overflow"); if (processor != NULL) { printf_filtered("cpu %d, cia 0x%lx: %s\n", processor->cpu_nr + 1, (unsigned long)cia, message); cpu_halt(processor, cia, was_signalled, -1); } else { error("cpu: %s", message); } } /* The processors local concept of time */ INLINE_CPU\ (signed64) cpu_get_time_base(cpu *processor) { return (event_queue_time(processor->events) - processor->time_base_local_time); } INLINE_CPU\ (void) cpu_set_time_base(cpu *processor, signed64 time_base) { processor->time_base_local_time = (event_queue_time(processor->events) - time_base); } INLINE_CPU\ (signed32) cpu_get_decrementer(cpu *processor) { return (processor->decrementer_local_time - event_queue_time(processor->events)); } STATIC_INLINE_CPU\ (void) cpu_decrement_event(void *data) { cpu *processor = (cpu*)data; processor->decrementer_event = NULL; decrementer_interrupt(processor); } INLINE_CPU\ (void) cpu_set_decrementer(cpu *processor, signed32 decrementer) { signed64 old_decrementer = cpu_get_decrementer(processor); event_queue_deschedule(processor->events, processor->decrementer_event); processor->decrementer_event = NULL; processor->decrementer_local_time = (event_queue_time(processor->events) + decrementer); if (decrementer < 0 && old_decrementer >= 0) /* A decrementer interrupt occures if the sign of the decrement register is changed from positive to negative by the load instruction */ decrementer_interrupt(processor); else if (decrementer >= 0) processor->decrementer_event = event_queue_schedule(processor->events, decrementer, cpu_decrement_event, processor); } #if WITH_IDECODE_CACHE_SIZE /* allow access to the cpu's instruction cache */ INLINE_CPU\ (idecode_cache *) cpu_icache_entry(cpu *processor, unsigned_word cia) { return &processor->icache[cia / 4 % WITH_IDECODE_CACHE_SIZE]; } INLINE_CPU\ (void) cpu_flush_icache(cpu *processor) { int i; /* force all addresses to 0xff... so that they never hit */ for (i = 0; i < WITH_IDECODE_CACHE_SIZE; i++) processor->icache[i].address = MASK(0, 63); } #endif /* address map revelation */ INLINE_CPU\ (vm_instruction_map *) cpu_instruction_map(cpu *processor) { return processor->instruction_map; } INLINE_CPU\ (vm_data_map *) cpu_data_map(cpu *processor) { return processor->data_map; } INLINE_CPU\ (void) cpu_page_tlb_invalidate_entry(cpu *processor, unsigned_word ea) { vm_page_tlb_invalidate_entry(processor->virtual, ea); } INLINE_CPU\ (void) cpu_page_tlb_invalidate_all(cpu *processor) { vm_page_tlb_invalidate_all(processor->virtual); } /* interrupt access */ INLINE_CPU\ (interrupts *) cpu_interrupts(cpu *processor) { return &processor->ints; } /* reservation access */ INLINE_CPU\ (memory_reservation *) cpu_reservation(cpu *processor) { return &processor->reservation; } /* register access */ INLINE_CPU\ (registers *) cpu_registers(cpu *processor) { return &processor->regs; } INLINE_CPU\ (void) cpu_synchronize_context(cpu *processor, unsigned_word cia) { #if (WITH_IDECODE_CACHE_SIZE) /* kill of the cache */ cpu_flush_icache(processor); #endif /* update virtual memory */ vm_synchronize_context(processor->virtual, processor->regs.spr, processor->regs.sr, processor->regs.msr, processor, cia); } /* might again be useful one day */ INLINE_CPU\ (void) cpu_print_info(cpu *processor, int verbose) { } #endif /* _CPU_C_ */
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