static bool
install_page (void *upage, void *kpage, bool writable)
{
struct thread *t = thread_current ();
return (pagedir_get_page (t->pagedir, upage) == NULL
&& pagedir_set_page (t->pagedir, upage, kpage, writable));
}
bool page_load(struct page *p, void *fp_addr)
{
lock_acquire(&load);
p->kpage = get_frame(PAL_USER);
lock_release(&load);
set_page_frame(p->kpage, p);
pin_frame(p->kpage);
if(p->kpage == NULL)
{
unpin_frame(p->kpage);
return false;
}
bool temp = true;
if(p->type == S)
{
temp = swap_load(p->kpage, p);
}
else if(p->type == F)
{
temp = file_load(p->kpage, p);
}
else
{
temp = zero_load(p->kpage);
}
if(!temp)
{
unpin_frame(p->kpage);
return false;
}
pagedir_clear_page(p->dir, fp_addr);
if(!pagedir_set_page(p->dir, fp_addr, p->kpage, p->write))
{
unpin_frame(p->kpage);
return false;
}
else if(!pagedir_get_page(p->dir, fp_addr))
{
unpin_frame(p->kpage);
return false;
}
p->load = true;
pagedir_set_dirty(p->dir, fp_addr, false);
pagedir_set_accessed(p->dir, fp_addr, true);
unpin_frame(p->kpage);
return true;
}
static bool
install_page (void *upage, void *kpage, bool writable)
{
struct thread *t = thread_current ();
/* Verify that there's not already a page at that virtual
address, then map our page there. */
return (pagedir_get_page (t->pagedir, upage) == NULL
&& pagedir_set_page (t->pagedir, upage, kpage, writable));
}
bool add_mapping(void *upage,void *kpage, bool writable,bool setdirty){
lock_acquire(&framelock);
struct thread *t = thread_current ();
/* Verify that there's not already a page at that virtual
address, then map our page there. */
bool status= (pagedir_get_page (t->pagedir, upage) == NULL
&& pagedir_set_page (t->pagedir, upage, kpage, writable));
if(status){
if(setdirty) pagedir_set_dirty(t->pagedir,upage,true);
add_list(kpage,upage);
}
lock_release(&framelock);
return status;
}
/* Adds a mapping from user virtual address UPAGE to kernel
virtual address KPAGE to the page table.
If WRITABLE is true, the user process may modify the page;
otherwise, it is read-only.
UPAGE must not already be mapped.
KPAGE should probably be a page obtained from the user pool
with palloc_get_page().
Returns true on success, false if UPAGE is already mapped or
if memory allocation fails. */
bool
install_page (void *upage, void *kpage, bool writable)
{
struct thread *t = thread_current ();
/* Verify that there's not already a page at that virtual
address, then map our page there. */
bool pageset = false;
bool isnull = (pagedir_get_page (t->pagedir, upage) == NULL);
if(isnull)
pageset = pagedir_set_page (t->pagedir, upage, kpage, writable);
if(DBG)printf("pageset boolean in install page = %d\n", pageset);
if(DBG)printf("isnull boolean in install page = %d\n", isnull);
return (isnull && pageset);
}
static int sys_mmap( int fd, void *vaddr )
{
struct thread *curr = thread_current();
struct list_elem *e;
struct opened_file_elem *opened_elem;
int check_valid = 0;
int count = 0;
// mmap_lock_acquire();
// printf("read bytes : %d\n",read_bytes);
// printf("aa\n");
if(vaddr==0)
{
// mmap_lock_release();
return -1;
}
// printf("%p\n",(int)vaddr&0xfff);
if( ((int)vaddr & 0xfff) !=0 || ( (int)vaddr>=PHYS_BASE -8*1024*1024 &&
(int)vaddr <=PHYS_BASE ) )
{
// printf("misalign\n");
// mmap_lock_release();
return -1;
}
struct page *check_page = page_lookup(curr,vaddr);
if( check_page!=NULL&& (check_page->writable == 0 || check_page->type==p_file) )
{
// mmap_lock_release();
return -1;
}
if(fd<2)
{
// mmap_lock_release();
return -1;
}
for( e = list_begin(&curr->openfile_list) ; e != list_end(&curr->openfile_list) ;
e = list_next(e) )
{
opened_elem=list_entry(e,struct opened_file_elem,elem_f);
if(opened_elem->fd==fd)
{
check_valid=1;
break;
}
}
if(check_valid==0)
{
// mmap_lock_release();
return -1;
}
for( e = list_begin(&curr->mapfile_list) ; e != list_end(&curr->mapfile_list) ;
e = list_next(e) )
{
// printf("check\n");
struct mapped_file_elem* mapped_elem=list_entry(e,struct mapped_file_elem,elem_m);
// printf("%d\n",mapped_elem->size);
if( mapped_elem->vaddr<=vaddr &&
vaddr<=mapped_elem->vaddr+mapped_elem->size)
{
// mmap_lock_release();
return -1;
}
}
struct mapped_file_elem *mapped_elem = (struct mapped_file_elem*)
malloc(sizeof(struct mapped_file_elem));
// char *name = (char*)malloc(strlen(opened_elem->name));
// strlcpy(name, opened_elem->name , strlen(opened_elem->name)+1);
int read_bytes = file_length(opened_elem->opened_file);
mapped_elem->mapped_file = opened_elem->opened_file;
mapped_elem->vaddr = vaddr;
mapped_elem->size = read_bytes;
mapped_elem->mapid = opened_elem->fd;
// mapped_elem->name = name;
list_push_back(&curr->mapfile_list,&mapped_elem->elem_m);
// printf("mapid: %d\n",opened_elem->mapid);
while(read_bytes >0)
{
// frame_lock_acquire();
int page_read_bytes = read_bytes<PGSIZE ? read_bytes:PGSIZE;
// printf("doing mmap\n");
// printf(" read bytes: %d\n",read_bytes);
page_allocate(vaddr, true, p_mmap, page_read_bytes,
PGSIZE-read_bytes, count*PGSIZE, mapped_elem->mapid);
// printf("mapid : %d\n",page_lookup(curr,vaddr)->mapid);
if(page_read_bytes < PGSIZE)
{
void *kpage=frame_elem_allocate(vaddr,true,PAL_USER);
file_read_at( mapped_elem->mapped_file, kpage, page_read_bytes, count*PGSIZE );
pagedir_set_page( thread_current()->pagedir,vaddr,kpage,true );
}
count+=1;
read_bytes-=PGSIZE;
vaddr+=PGSIZE;
// frame_lock_release();
}
// printf(" page allocate num:%d\n",count);
// printf("mmap finish\n");
// mmap_lock_release();
return mapped_elem->mapid;
}
static void sys_close(int fd)
{
struct thread *curr = thread_current();
struct list_elem *e;
struct list_elem *e_m;
struct opened_file_elem *opened_elem;
struct mapped_file_elem *mapped_elem;
int check_valid=0;
int check_map=0;
int check_frame=0;
int count=0;
// printf("close start\n");
if(fd<2)
{
lock_release(&process_lock);
sys_exit(-1);
}
for( e = list_begin(&curr->openfile_list) ; e != list_end(&curr->openfile_list) ;
e = list_next(e) )
{
opened_elem=list_entry(e,struct opened_file_elem,elem_f);
if(opened_elem->fd==fd)
{
check_valid=1;
break;
}
}
for( e_m = list_begin(&curr->mapfile_list) ; e_m != list_end(&curr->mapfile_list) ;
e_m = list_next(e_m) )
{
mapped_elem=list_entry(e_m,struct mapped_file_elem,elem_m);
if(mapped_elem->mapid==fd)
{
check_map=1;
break;
}
}
// printf("%d clos!\n",fd);
// printf("pick\n");
if(check_map!=0)
{
// printf("find\n");
struct hash_iterator i;
hash_first(&i,&curr->pages);
while(hash_next(&i))
{
// printf("lazy mapping\n");
struct page *pa = hash_entry( hash_cur(&i), struct page, hash_elem);
struct list_elem *e_f;
struct frame_elem *f;
if(pa->mapid == mapped_elem->mapid )
{
for(e = list_begin( &frame_table ) ; e != list_end( &frame_table) ;
e = list_next (e) )
{
f = list_entry( e,struct frame_elem , elem);
if(f->vaddr == pa->vaddr)
{
check_frame=1;
break;
}
}
if( check_frame==0 )
{
int read_bytes = file_length(opened_elem->opened_file);
// printf("adsfmlakdfmkl\n");
while(read_bytes>0)
{
// frame_lock_acquire();
int page_read_bytes = read_bytes<PGSIZE ? read_bytes:PGSIZE;
void *kpage = frame_elem_allocate(pa->vaddr, true,PAL_USER|PAL_ZERO);
pagedir_set_page(curr->pagedir, pa->vaddr, kpage, true);
file_read_at( opened_elem->opened_file, kpage , page_read_bytes, pa->offset+count*PGSIZE);
count+=1;
read_bytes-=PGSIZE;
// frame_lock_release();
}
}
}
}
}
if(check_valid==1)
{
list_remove(&opened_elem->elem_f);
file_close(opened_elem->opened_file);
// free(opened_elem->name);
free(opened_elem);
}
if(check_valid==0)
{
lock_release(&process_lock);
sys_exit(-1);
}
// printf("close succeed\n");
}
/*! Obtains and returns a group of PAGE_CNT contiguous free pages starting at
START_ADDR. If PAL_USER is set, the pages are obtained from the user pool,
otherwise from the kernel pool. If PAL_ZERO is set in FLAGS, then the pages
are filled with zeros. If PAL_PIN is set in FLGAS, then the pages are
pinned. If too few pages are available, returns a null pointer, unless
PAL_ASSERT is set in FLAGS, in which case the kernel panics. If LOAD_TYPE
is ZERO_PAGE, then the page data pointer is set to NULL, otherwise it is set
to the passed pointer DATA. If LOAD_TYPE is FILE_PAGE, the page's file
offset is set to F_OFS. */
void *palloc_make_multiple_addr(void * start_addr,
enum palloc_flags flags,
size_t page_cnt,
enum page_load load_type,
void *data,
void *f_ofs) {
struct list *alloc_page_list;
uint32_t i;
struct thread *t = thread_current();
uint32_t *pagedir;
uint32_t *pte;
void *vaddr;
void *curr_f_ofs = f_ofs;
/* Page data should not be in a frame. */
if (load_type == FRAME_PAGE) {
/* TODO: case where it is in a frame. */
ASSERT(false);
}
/* Use to correct pool based on whether it is paging data or not. */
if (flags & PAL_PAGING) {
alloc_page_list = init_page_dir_sup;
pagedir = init_page_dir;
} else {
alloc_page_list = &(t->page_entries);
pagedir = t->pagedir;
}
/* If block at specified address is not open, return NULL. */
if (!palloc_block_open(start_addr, page_cnt)) {
if (flags & PAL_ASSERT) {
PANIC("palloc: out of pages");
}
return NULL;
}
/* Allocate all pages for the block. */
for (i = 0; i < page_cnt; i++) {
/* Create a supplemental entry for the page. */
struct page_entry *page_i = get_page_entry();
ASSERT (page_i != NULL);
/* Get the virtual address for the page. */
vaddr = (uint8_t *) (start_addr + (i * PGSIZE)) + PGSIZE * 1000;
/* Initialize the page. */
page_i->vaddr = vaddr;
page_i->source = load_type;
if (load_type == ZERO_PAGE) {
page_i->data = NULL;
}
else {
page_i->data = data;
}
if (load_type == FILE_PAGE) {
/* Get the file offset. */
curr_f_ofs += PGSIZE;
page_i->f_ofs = curr_f_ofs;
}
else {
page_i->f_ofs = NULL;
}
/* Add to list of allocated pages in order by address. */
list_insert_ordered(alloc_page_list, &(page_i->elem),
palloc_page_less, NULL);
if (flags & PAL_USER) {
pagedir_set_page(pagedir, vaddr, 0, !(flags & PAL_READO));
} else {
if(!pagedir_set_page_kernel(pagedir, vaddr, 0, !(flags & PAL_READO))) {
if (flags & PAL_ASSERT) {
PANIC("palloc: out of pages");
}
return NULL;
}
}
pte = lookup_page(pagedir, vaddr, false);
/* Pin the page if necessary. */
if (flags & PAL_PIN) {
*pte = *pte | PTE_PIN;
}
}
return start_addr;
}