int
main()
{
unsigned int i;
if(init_hardware("etc/hardware.ini") == 0) {
fprintf(stderr, "Error in hardware initialization\n");
exit(EXIT_FAILURE);
}
printf("ATTENTION !\nSi l'on donne une taille de matrice très grande, le processus peut prendre un certain temps\n\n");
printf("MATRIX_SIZE : %d\n\n", MATRIX_SIZE);
for(i=0;i<16;i++){
IRQVECTOR[i] = ignore;
}
_out(MMU_PROCESS,1);
IRQVECTOR[MMU_IRQ] = mmuhandler;
IRQVECTOR[SYSCALL_SWTCH_0] = switch_to_process0;
IRQVECTOR[SYSCALL_SWTCH_1] = switch_to_process1;
_mask(0x1001);
if(init_swap("./swap_file")==-1){
printf("erreur\n");
}
init();
return 0;
}
//adds a page to swap space, gets called with the physical memory position
size_t add_swap (void * addr) {
//init swap if necessary
if (swap == NULL) //init the swap table
init_swap ();
//lock the swap table
lock_acquire(&swap_lock);
//find a free entry in the bitmap table
size_t free = bitmap_scan (swap_table, 0, 1, false);
//if the swap table is full panic the kernel
if (free == BITMAP_ERROR) PANIC ("Swaptable is full\n");
int i;
//get frame and the memory position and write it to swap
for (i = 0; i< SECPP; i++)
//write block to swap, free * SECPP is the correct block position and + i because a page has a different size, same for addr
block_write (swap, free * SECPP + i, addr + BLOCK_SECTOR_SIZE * i);
//set the corresponding entry in the swap_table to true
bitmap_set (swap_table, free, true);
//release the lock for the swap table
lock_release(&swap_lock);
return free;
}
/**************************** core implementation ****************************/
int page_sim_init(unsigned page_size, unsigned mem_size,
unsigned addr_space_size, unsigned max_concurrent_operations,
pagesim_callback callback)
{
if (!globals.active)
{
if (pthread_mutex_lock(&lib_init_end_mutex) == ERROR)
return ERROR;
if (check_init_constraints(page_size,
mem_size,
addr_space_size,
max_concurrent_operations) == ERROR)
return ERROR;
globals.page_size = page_size;
globals.mem_size = mem_size;
globals.addr_space_size = addr_space_size;
globals.act_concurrent_operations = 0;
globals.act_queries = 0;
globals.logger = callback;
if (pthread_mutex_init(&globals.concurrent_operations_mutex, NULL)
== ERROR)
return ERROR;
if (pthread_cond_init(&globals.io_oveflow_cond, NULL)
== ERROR)
return ERROR;
if (pthread_mutex_init(&globals.logger_mutex, NULL)
== ERROR)
return ERROR;
if (pthread_mutex_init(&globals.select_mutex, NULL)
== ERROR)
return ERROR;
if (pthread_mutex_init(&globals.act_queries_mutex, NULL)
== ERROR)
return ERROR;
init_strategy_metadata();
if (init_swap() == ERROR)
return ERROR;
if (init_pages() == ERROR)
return ERROR;
globals.active = true;
if (pthread_mutex_unlock(&lib_init_end_mutex) == ERROR)
return ERROR;
return SUCCESS;
}
return ERROR;
}
int main(int argc, char **argv)
{
/* init hardware */
if(init_hardware("hardware.ini") == 0)
{
fprintf(stderr, "Error in hardware initialization\n");
exit(EXIT_FAILURE);
}
init_swap("swapfile");
memset(vm_mapping, 0, sizeof(struct vm_mapping_s) * VM_PAGES);
memset(pm_mapping, 0, sizeof(struct pm_mapping_s) * PM_PAGES);
IRQVECTOR[MMU_IRQ] = mmuhandler;
_mask(0x1001);
user_process();
return 0;
}