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Moved all pager page-mapping routines to memory.c

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Added a new virtual address pool for contiguous virtual addresses for the pager.
This will help in mapping multi-page user buffers and files.
This commit is contained in:
Bahadir Balban
2008-11-21 21:05:42 +02:00
parent 2d5a08ff32
commit 7d38243dff
6 changed files with 113 additions and 23 deletions
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22
tasks/mm0/src/file.c
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@@ -21,6 +21,7 @@
#include <user.h>
#include <test.h>
/* Copy from one page's buffer into another page */
int page_copy(struct page *dst, struct page *src,
unsigned long dst_offset, unsigned long src_offset,
@@ -308,27 +309,6 @@ int read_file_pages(struct vm_file *vmfile, unsigned long pfn_start,
return 0;
}
/* Maps a page from a vm_file to the pager's address space */
void *pager_map_page(struct vm_file *f, unsigned long page_offset)
{
int err;
struct page *p;
if ((err = read_file_pages(f, page_offset, page_offset + 1)) < 0)
return PTR_ERR(err);
if ((p = find_page(&f->vm_obj, page_offset)))
return (void *)l4_map_helper((void *)page_to_phys(p), 1);
else
return 0;
}
/* Unmaps a page's virtual address from the pager's address space */
void pager_unmap_page(void *addr)
{
l4_unmap_helper(addr, 1);
}
int vfs_write(unsigned long vnum, unsigned long file_offset,
unsigned long npages, void *pagebuf)
{