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/* |
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* Cisco 7200 (Predator) simulation platform. |
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* Copyright (c) 2005,2006 Christophe Fillot (cf@utc.fr) |
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* |
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* Management of CPU groups (for MP systems). |
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*/ |
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|
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#define _GNU_SOURCE |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <stdarg.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/mman.h> |
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#include <fcntl.h> |
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#include <pthread.h> |
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|
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#include "mips64.h" |
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#include "dynamips.h" |
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#include "cpu.h" |
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#include "memory.h" |
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#include "device.h" |
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#include "cp0.h" |
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#include "mips64_exec.h" |
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#include "vm.h" |
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|
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/* Find a CPU in a group given its ID */ |
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cpu_mips_t *cpu_group_find_id(cpu_group_t *group,u_int id) |
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{ |
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cpu_mips_t *cpu; |
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|
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if (!group) |
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return NULL; |
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|
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for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
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if (cpu->id == id) |
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return cpu; |
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|
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return NULL; |
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} |
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|
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/* Find the highest CPU ID in a CPU group */ |
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int cpu_group_find_highest_id(cpu_group_t *group,u_int *highest_id) |
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{ |
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cpu_mips_t *cpu; |
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u_int max_id = 0; |
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|
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if (!group || group->cpu_list) |
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return(-1); |
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|
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for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
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if (cpu->id >= max_id) |
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max_id = cpu->id; |
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|
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*highest_id = max_id; |
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return(0); |
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} |
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|
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/* Add a CPU in a CPU group */ |
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int cpu_group_add(cpu_group_t *group,cpu_mips_t *cpu) |
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{ |
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if (!group) |
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return(-1); |
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|
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/* check that we don't already have a CPU with this id */ |
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if (cpu_group_find_id(group,cpu->id) != NULL) { |
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fprintf(stderr,"cpu_group_add: CPU%u already present in group.\n", |
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cpu->id); |
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return(-1); |
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} |
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|
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cpu->next = group->cpu_list; |
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group->cpu_list = cpu; |
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return(0); |
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} |
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|
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/* Create a new CPU group */ |
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cpu_group_t *cpu_group_create(char *name) |
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{ |
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cpu_group_t *group; |
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|
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if (!(group = malloc(sizeof(*group)))) |
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return NULL; |
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|
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group->name = name; |
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group->cpu_list = NULL; |
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return group; |
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} |
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|
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/* Delete a CPU group */ |
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void cpu_group_delete(cpu_group_t *group) |
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{ |
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cpu_mips_t *cpu,*next; |
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|
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if (group != NULL) { |
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for(cpu=group->cpu_list;cpu;cpu=next) { |
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next = cpu->next; |
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cpu_delete(cpu); |
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} |
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|
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free(group); |
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} |
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} |
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|
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/* Rebuild the MTS subsystem for a CPU group */ |
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int cpu_group_rebuild_mts(cpu_group_t *group) |
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{ |
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cpu_mips_t *cpu; |
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|
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for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
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cpu->mts_rebuild(cpu); |
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|
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return(0); |
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} |
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|
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/* Log a message for a CPU */ |
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void cpu_log(cpu_mips_t *cpu,char *module,char *format,...) |
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{ |
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char buffer[256]; |
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va_list ap; |
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|
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va_start(ap,format); |
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snprintf(buffer,sizeof(buffer),"CPU%u: %s",cpu->id,module); |
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vm_flog(cpu->vm,buffer,format,ap); |
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va_end(ap); |
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} |
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|
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/* Create a new CPU */ |
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cpu_mips_t *cpu_create(vm_instance_t *vm,u_int id) |
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{ |
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void *(*cpu_run_fn)(void *); |
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cpu_mips_t *cpu; |
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|
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if (!(cpu = malloc(sizeof(*cpu)))) |
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return NULL; |
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|
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memset(cpu,0,sizeof(*cpu)); |
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cpu->vm = vm; |
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|
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/* by default, use a standard initialization (CPU exec is suspended) */ |
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mips64_init(cpu); |
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cpu->id = id; |
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cpu->state = MIPS_CPU_SUSPENDED; |
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|
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cpu_run_fn = (void *)insn_block_execute; |
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#if __GNUC__ > 2 |
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if (!cpu->vm->jit_use) { |
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cpu_run_fn = (void *)mips64_exec_run_cpu; |
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} else { |
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mips64_jit_init(cpu); |
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} |
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#endif |
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|
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/* create the CPU thread execution */ |
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if (pthread_create(&cpu->cpu_thread,NULL,cpu_run_fn,cpu) != 0) { |
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fprintf(stderr,"cpu_create: unable to create thread for CPU%u\n",id); |
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free(cpu); |
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return NULL; |
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} |
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|
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return cpu; |
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} |
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|
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/* Delete a CPU */ |
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void cpu_delete(cpu_mips_t *cpu) |
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{ |
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if (cpu) { |
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/* Stop activity of this CPU */ |
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cpu_stop(cpu); |
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pthread_join(cpu->cpu_thread,NULL); |
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|
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/* Free resources */ |
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mips64_delete(cpu); |
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} |
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} |
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|
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/* Start a CPU */ |
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void cpu_start(cpu_mips_t *cpu) |
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{ |
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if (cpu) { |
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cpu_log(cpu,"CPU_STATE","Starting CPU (old state=%u)...\n",cpu->state); |
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cpu->state = MIPS_CPU_RUNNING; |
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} |
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} |
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|
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/* Stop a CPU */ |
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void cpu_stop(cpu_mips_t *cpu) |
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{ |
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if (cpu) { |
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cpu_log(cpu,"CPU_STATE","Halting CPU (old state=%u)...\n",cpu->state); |
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cpu->state = MIPS_CPU_HALTED; |
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} |
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} |
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|
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/* Start all CPUs of a CPU group */ |
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void cpu_group_start_all_cpu(cpu_group_t *group) |
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{ |
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cpu_mips_t *cpu; |
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|
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for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
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cpu_start(cpu); |
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} |
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|
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/* Stop all CPUs of a CPU group */ |
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void cpu_group_stop_all_cpu(cpu_group_t *group) |
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{ |
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cpu_mips_t *cpu; |
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|
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for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
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cpu_stop(cpu); |
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} |
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|
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/* Set a state of all CPUs of a CPU group */ |
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void cpu_group_set_state(cpu_group_t *group,u_int state) |
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{ |
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cpu_mips_t *cpu; |
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|
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for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
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cpu->state = state; |
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} |
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|
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/* Returns TRUE if all CPUs in a CPU group are inactive */ |
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static int cpu_group_check_activity(cpu_group_t *group) |
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{ |
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cpu_mips_t *cpu; |
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|
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for(cpu=group->cpu_list;cpu;cpu=cpu->next) { |
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if (!cpu->cpu_thread_running) |
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continue; |
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|
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if ((cpu->state == MIPS_CPU_RUNNING) || !cpu->seq_state) |
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return(FALSE); |
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} |
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|
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return(TRUE); |
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} |
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|
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/* Synchronize on CPUs (all CPUs must be inactive) */ |
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int cpu_group_sync_state(cpu_group_t *group) |
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{ |
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cpu_mips_t *cpu; |
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m_tmcnt_t t1,t2; |
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|
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/* Check that CPU activity is really suspended */ |
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t1 = m_gettime(); |
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|
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for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
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cpu->seq_state = 0; |
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|
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while(!cpu_group_check_activity(group)) { |
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t2 = m_gettime(); |
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|
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if (t2 > (t1 + 10000)) |
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return(-1); |
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|
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usleep(50000); |
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} |
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|
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return(0); |
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} |
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|
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/* Save state of all CPUs */ |
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int cpu_group_save_state(cpu_group_t *group) |
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{ |
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cpu_mips_t *cpu; |
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|
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for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
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cpu->prev_state = cpu->state; |
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|
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return(TRUE); |
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} |
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|
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/* Restore state of all CPUs */ |
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int cpu_group_restore_state(cpu_group_t *group) |
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{ |
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cpu_mips_t *cpu; |
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|
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for(cpu=group->cpu_list;cpu;cpu=cpu->next) |
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cpu->state = cpu->prev_state; |
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|
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return(TRUE); |
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} |
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