423A35C7/os_kernel_lab
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update codes

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This commit is contained in:
chyyuu
2012-09-14 21:36:57 +08:00
parent c417874aa8
commit 92c553113b
32 changed files with 506 additions and 1809 deletions
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2
code/lab2/kern/mm/memlayout.h
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@@ -97,7 +97,7 @@ struct e820map {
* that convert Page to other data types, such as phyical address.
* */
struct Page {
atomic_t ref; // page frame's reference counter
int ref; // page frame's reference counter
uint32_t flags; // array of flags that describe the status of the page frame
unsigned int property; // the num of free block, used in first fit pm manager
list_entry_t page_link; // free list link

10
code/lab2/kern/mm/pmm.h
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@@ -117,22 +117,24 @@ pde2page(pde_t pde) {
static inline int
page_ref(struct Page *page) {
return atomic_read(&(page->ref));
return page->ref;
}
static inline void
set_page_ref(struct Page *page, int val) {
atomic_set(&(page->ref), val);
page->ref = val;
}
static inline int
page_ref_inc(struct Page *page) {
return atomic_add_return(&(page->ref), 1);
page->ref += 1;
return page->ref;
}
static inline int
page_ref_dec(struct Page *page) {
return atomic_sub_return(&(page->ref), 1);
page->ref -= 1;
return page->ref;
}
extern char bootstack[], bootstacktop[];