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Got mm0 to compile. A lot of issues expected.

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This commit is contained in:
Bahadir Balban
2008-03-12 22:58:26 +00:00
parent cd79fa8f58
commit d718b8efd5
7 changed files with 59 additions and 75 deletions
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49
tasks/mm0/src/task.c
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@@ -365,13 +365,14 @@ void init_pm(struct initdata *initdata)
/*
* Makes the virtual to page translation for a given user task.
* If page is not mapped (either not faulted or swapped), returns 0.
*/
struct page *task_virt_to_page(struct tcb *t, unsigned long virtual)
{
unsigned long vaddr_vma_offset;
unsigned long vaddr_file_offset;
unsigned long vma_offset;
unsigned long file_offset;
struct vm_obj_link *vmo_link;
struct vm_area *vma;
struct vm_object *vmo;
struct page *page;
/* First find the vma that maps that virtual address */
@@ -384,33 +385,31 @@ struct page *task_virt_to_page(struct tcb *t, unsigned long virtual)
/* Find the pfn offset of virtual address in this vma */
BUG_ON(__pfn(virtual) < vma->pfn_start ||
__pfn(virtual) > vma->pfn_end);
vaddr_vma_offset = __pfn(virtual) - vma->pfn_start;
vma_offset = __pfn(virtual) - vma->pfn_start;
/* Find the file offset of virtual address in this file */
vmo = vma->owner;
vaddr_file_offset = vma->f_offset + vaddr_vma_offset;
file_offset = vma->file_offset + vma_offset;
/* TODO:
* Traverse vm objects to find the one with the page.
* Check each object's cache by find page. dont page in.
*/
/* Get the initial link */
BUG_ON(!(vmo_link = vma_next_link(&vma->vm_obj_list,
&vma->vm_obj_list)));
/*
* Find the page with the same file offset with that of the
* virtual address, that is, if the page is resident in memory.
*/
list_for_each_entry(page, &vmfile->page_cache_list, list)
if (vaddr_file_offset == page->f_offset) {
printf("%s: %s: Found page @ 0x%x, f_offset: 0x%x, with vma @ 0x%x, vmfile @ 0x%x\n", __TASKNAME__,
__FUNCTION__, (unsigned long)page, page->f_offset, vma, vma->owner);
return page;
}
/* Is page there in the cache ??? */
while(!(page = find_page(vmo_link->obj, file_offset))) {
/* No, check the next link */
if (!(vmo_link = vma_next_link(&vma->vm_obj_list,
&vma->vm_obj_list)));
/* Exhausted the objects. The page is not there. */
return 0;
}
/*
* The page is not found, meaning that it is not mapped in
* yet, e.g. via a page fault.
*/
return 0;
/* Found it */
printf("%s: %s: Found page @ 0x%x, file_offset: 0x%x, "
"with vma @ 0x%x, vm object @ 0x%x\n", __TASKNAME__,
__FUNCTION__, (unsigned long)page, page->offset,
vma, vmo_link->obj);
return page;
}
struct task_data {