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Fixed most compiler errors. Need to do more.

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This commit is contained in:
Bahadir Balban
2008-03-12 22:20:32 +00:00
parent 8447cd6ce3
commit cd79fa8f58
12 changed files with 615 additions and 569 deletions
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82
tasks/mm0/src/pagers.c
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@@ -5,6 +5,7 @@
#include <l4/lib/list.h>
#include <l4lib/arch/syscalls.h>
#include <l4lib/arch/syslib.h>
#include <kmalloc/kmalloc.h>
#include <mm/alloc_page.h>
#include <vm_area.h>
#include <string.h>
@@ -12,6 +13,18 @@
#include <init.h>
#include INC_ARCH(bootdesc.h)
struct page *page_init(struct page *page)
{
/* Reset page */
memset(page, 0, sizeof(*page));
page->refcnt = -1;
spin_lock_init(&page->lock);
INIT_LIST_HEAD(&page->list);
return page;
}
struct page *find_page(struct vm_object *obj, unsigned long pfn)
{
struct page *p;
@@ -23,25 +36,32 @@ struct page *find_page(struct vm_object *obj, unsigned long pfn)
return 0;
}
/*
* Deletes all pages in a page cache, assumes pages are from the
* page allocator, and page structs are from the page_array, which
* is the default situation.
*/
int default_release_pages(struct vm_object *vm_obj)
{
struct page *p;
struct list_head *n;
void *phys;
struct page *p, *n;
list_for_each_entry_safe(p, n, &vm_obj->page_cache, list) {
list_del(&p->list);
BUG_ON(p->refcnt);
/* Return page back to allocator */
free_page(page_to_phys(p));
free_page((void *)page_to_phys(p));
/* Free the page structure */
kfree(p);
/* Reduce object page count */
BUG_ON(--vm_obj->npages < 0);
}
return 0;
}
struct page *file_page_in(struct vm_object *vm_obj, unsigned long page_offset)
{
struct vm_file *f = vm_object_to_file(vm_obj);
@@ -78,8 +98,8 @@ struct page *file_page_in(struct vm_object *vm_obj, unsigned long page_offset)
vm_obj->npages++;
/* Update page details */
spin_lock(&page->lock);
page->count++;
page_init(page);
page->refcnt++;
page->owner = vm_obj;
page->offset = page_offset;
page->virtual = 0;
@@ -87,7 +107,6 @@ struct page *file_page_in(struct vm_object *vm_obj, unsigned long page_offset)
/* Add the page to owner's list of in-memory pages */
BUG_ON(!list_empty(&page->list));
insert_page_olist(page, vm_obj);
spin_unlock(&page->lock);
}
return page;
@@ -142,7 +161,7 @@ struct vm_swap_node {
struct page *swap_page_in(struct vm_object *vm_obj, unsigned long file_offset)
{
/* No swapping yet, so the page is either here or not here. */
return find_page(vm_obj, page_offset);
return find_page(vm_obj, file_offset);
}
struct vm_pager swap_pager = {
@@ -152,6 +171,27 @@ struct vm_pager swap_pager = {
},
};
/*
* Just releases the page structures since the actual pages are
* already in memory as read-only.
*/
int bootfile_release_pages(struct vm_object *vm_obj)
{
struct page *p, *n;
list_for_each_entry_safe(p, n, &vm_obj->page_cache, list) {
list_del(&p->list);
BUG_ON(p->refcnt);
/* Free the page structure */
kfree(p);
/* Reduce object page count */
BUG_ON(--vm_obj->npages < 0);
}
return 0;
}
/* Returns the page with given offset in this vm_object */
struct page *bootfile_page_in(struct vm_object *vm_obj,
unsigned long offset)
@@ -161,23 +201,29 @@ struct page *bootfile_page_in(struct vm_object *vm_obj,
struct page *page = phys_to_page(img->phys_start +
__pfn_to_addr(offset));
spin_lock(&page->lock);
page->count++;
spin_unlock(&page->lock);
/* TODO: Check file length against page offset! */
/* FIXME: Why not add pages to linked list and update npages? */
/* Update page */
page_init(page);
page->refcnt++;
/* Update object */
vm_obj->npages++;
/* Add the page to owner's list of in-memory pages */
BUG_ON(!list_empty(&page->list));
insert_page_olist(page, vm_obj);
return page;
}
struct vm_pager bootfile_pager = {
.ops = {
.page_in = bootfile_page_in,
.release_pages = bootfile_release_pages,
},
};
LIST_HEAD(boot_file_list);
/* From bare boot images, create mappable device files */
int init_boot_files(struct initdata *initdata)
@@ -196,7 +242,7 @@ int init_boot_files(struct initdata *initdata)
boot_file->type = VM_FILE_BOOTFILE;
/* Initialise the vm object */
boot_file->vm_obj.type = VM_OBJ_FILE;
boot_file->vm_obj.flags = VM_OBJ_FILE;
boot_file->vm_obj.pager = &bootfile_pager;
/* Add the object to global vm_object list */
@@ -219,8 +265,8 @@ struct page *devzero_page_in(struct vm_object *vm_obj,
/* Update zero page struct. */
spin_lock(&zpage->lock);
BUG_ON(zpage->count < 0);
zpage->count++;
BUG_ON(zpage->refcnt < 0);
zpage->refcnt++;
spin_unlock(&zpage->lock);
return zpage;
@@ -254,13 +300,13 @@ int init_devzero(void)
zvirt = l4_map_helper(zphys, 1);
memset(zvirt, 0, PAGE_SIZE);
l4_unmap_helper(zvirt, 1);
zpage->count++;
zpage->refcnt++;
/* Allocate and initialise devzero file */
devzero = vmfile_alloc_init();
devzero->vm_obj.npages = ~0;
devzero->vm_obj.pager = &devzero_pager;
devzero->vm_obj.type = VM_OBJ_FILE;
devzero->vm_obj.flags = VM_OBJ_FILE;
devzero->type = VM_FILE_DEVZERO;
devzero->priv_data = zpage;