int main(int argc, const char *argv[]) {
if(!allocate_registers()) {
printf("error allocating registers\n");
return EXIT_FAILURE;
}
if(!allocate_ram()) {
printf("error allocating ram\n");
return EXIT_FAILURE;
}
if(!load_program(argv[1])) {
printf("error loading program\n");
return EXIT_FAILURE;
}
while(running) {
cycle();
}
//debug_ram();
return EXIT_SUCCESS;
}
/********************** ************************/
int main(int argc,char *argv[]) {
int n_pages = 0;
//int n_frames = 0;
ram_info_t ram_info;//
ram_info.n_frames = 0;//
ram_info.algorithm = NULL;//
int n_cache = 0;
int n_tlb = 0;
char *access_file = NULL;
FILE *access_fd = NULL;
addr_t virtual_addr = 0;
addr_t physical_addr;
pid_t pid = 0;
char mode;
/*
* Parse arguments
*/
if( 0 != parse_args(argc, argv, &access_file, &n_pages, &ram_info.n_frames, &n_cache, &n_tlb, &ram_info.algorithm) ) {//
return -1;
}
/*
* Setup data structures
*/
srand(time(NULL));
current_ref = (char *)malloc(sizeof(char) * MAX_LINE);
clear_stats();
stats.cache_size = n_cache;
stats.tlb_size = n_tlb;
stats.num_pages = n_pages;
stats.num_frames = ram_info.n_frames;//
printf("Allocating resources...\n");
allocate_cache(n_cache);
allocate_tlb(n_tlb);
allocate_page_table(n_pages);
allocate_page_directory(n_pages);
//allocate_ram(n_frames);
allocate_ram(ram_info);
/*
* Open the file that we are going to read
*/
if( NULL == (access_fd = fopen(access_file, "r") ) ) {
fprintf(stderr, "Error: Unable to open the access file <%s>\n", access_file);
return -1;
}
/*
* Read page requests from the file
*/
gettimeofday(&stats.start, NULL);
while(0 == feof(access_fd) ) {
/* Read one line */
current_ref[0] = '\0';
if( NULL == fgets(current_ref, MAX_LINE, access_fd) ) {
break;
}
/* Strip off the newline */
if( '\n' == current_ref[strlen(current_ref)-1] ) {
current_ref[strlen(current_ref)-1] = '\0';
}
extract_args(current_ref, &pid, &mode, &virtual_addr);
/*
* Memory management operations to access the page
*/
if(VERBOSE){
printf("-----------------------------------------------------------\n");
printf("%s: Process %*d \t Access [Page %4d, Offset %#05x] (%#010x)\n",
current_ref,
MAX_PID_LEN, pid,
GET_PAGE(virtual_addr), GET_OFFSET(virtual_addr), virtual_addr);
}
access_page(pid, mode, virtual_addr, &physical_addr);
if(VERBOSE){
printf("%s: Process %*d \t Access [Page %4d, Offset %#05x] (%#010x) --> (%#010x) [Frame %4d, Offset %#05x]\n",
current_ref,
MAX_PID_LEN, pid,
GET_PAGE(virtual_addr), GET_OFFSET(virtual_addr), virtual_addr,
physical_addr, GET_FRAME(physical_addr), GET_OFFSET(physical_addr));
}
}
gettimeofday(&stats.end, NULL);
display_stats();
/*
* Cleanup
*/
fclose(access_fd);
if( NULL != current_ref ) {
free(current_ref);
current_ref = NULL;
}
free_ram();
free_page_dir();
free_tlb();
free_cache();
return 0;
}
