KAAAsS/ChCore-exercise
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

format buddy.c

Browse Source
This commit is contained in:
KAAAsS 2021-05-12 22:57:07 +08:00
parent fd018168a9
commit a3e56b886e
Signed by: KAAAsS
GPG Key ID: D56625F3E671882F
1 changed files with 97 additions and 106 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
lab2/kernel/mm/buddy.c
View File

@ -11,8 +11,7 @@
* The usable memory: [pool_start_addr, pool_start_addr + pool_mem_size).
*/
void init_buddy(struct phys_mem_pool *pool, struct page *start_page,
vaddr_t start_addr, u64 page_num)
{
vaddr_t start_addr, u64 page_num) {
int order;
int page_idx;
struct page *page;
@ -48,8 +47,7 @@ void init_buddy(struct phys_mem_pool *pool, struct page *start_page,
}
static struct page *get_buddy_chunk(struct phys_mem_pool *pool,
struct page *chunk)
{
struct page *chunk) {
u64 chunk_addr;
u64 buddy_chunk_addr;
int order;
@ -87,8 +85,7 @@ static struct page *get_buddy_chunk(struct phys_mem_pool *pool,
* smaller sub-pages.
*/
static struct page *split_page(struct phys_mem_pool *pool, u64 order,
struct page *page)
{
struct page *page) {
// <lab2>
struct page *split_page = NULL;
return split_page;
@ -103,8 +100,7 @@ static struct page *split_page(struct phys_mem_pool *pool, u64 order,
* Hints: Find the corresonding free_list which can allocate 1<<order
* continuous pages and don't forget to split the list node after allocation
*/
struct page *buddy_get_pages(struct phys_mem_pool *pool, u64 order)
{
struct page *buddy_get_pages(struct phys_mem_pool *pool, u64 order) {
// <lab2>
struct page *page = NULL;
@ -121,8 +117,7 @@ struct page *buddy_get_pages(struct phys_mem_pool *pool, u64 order)
* there is not corresponding buddy page. get_buddy_chunk
* is helpful in this function.
*/
static struct page *merge_page(struct phys_mem_pool *pool, struct page *page)
{
static struct page *merge_page(struct phys_mem_pool *pool, struct page *page) {
// <lab2>
struct page *merge_page = NULL;
@ -137,15 +132,13 @@ static struct page *merge_page(struct phys_mem_pool *pool, struct page *page)
*
* Hints: you can invoke merge_page.
*/
void buddy_free_pages(struct phys_mem_pool *pool, struct page *page)
{
void buddy_free_pages(struct phys_mem_pool *pool, struct page *page) {
// <lab2>
// </lab2>
}
void *page_to_virt(struct phys_mem_pool *pool, struct page *page)
{
void *page_to_virt(struct phys_mem_pool *pool, struct page *page) {
u64 addr;
/* page_idx * BUDDY_PAGE_SIZE + start_addr */
@ -154,8 +147,7 @@ void *page_to_virt(struct phys_mem_pool *pool, struct page *page)
return (void *) addr;
}
struct page *virt_to_page(struct phys_mem_pool *pool, void *addr)
{
struct page *virt_to_page(struct phys_mem_pool *pool, void *addr) {
struct page *page;
page = pool->page_metadata +
@ -163,8 +155,7 @@ struct page *virt_to_page(struct phys_mem_pool *pool, void *addr)
return page;
}
u64 get_free_mem_size_from_buddy(struct phys_mem_pool * pool)
{
u64 get_free_mem_size_from_buddy(struct phys_mem_pool *pool) {
int order;
struct free_list *list;
u64 current_order_size;