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Wiring between mm0 page cache and vfs almost what it should look like.

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This implements the infrastructure for read/write system calls where
file content is first searched in mm0's page cache and then read-in
or written via the vfs read/write functions.
	modified:   tasks/fs0/src/syscalls.c
	modified:   tasks/mm0/include/lib/bit.h
	modified:   tasks/mm0/include/lib/idpool.h
	modified:   tasks/mm0/include/task.h
	modified:   tasks/mm0/include/vm_area.h
	modified:   tasks/mm0/main.c
	modified:   tasks/mm0/src/devzero.c
	modified:   tasks/mm0/src/fault.c
	new file:   tasks/mm0/src/file.c
	modified:   tasks/mm0/src/init.c
	modified:   tasks/mm0/src/lib/bit.c
	modified:   tasks/mm0/src/lib/idpool.c
	modified:   tasks/mm0/src/task.c
This commit is contained in:
Bahadir Balban
2008-02-18 22:26:39 +00:00
parent 0fdc64ba2d
commit d67d6b84a9
13 changed files with 365 additions and 57 deletions
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18
tasks/mm0/include/vm_area.h
View File

@@ -59,8 +59,8 @@ struct fault_data {
};
struct vm_pager_ops {
void (*read_page)(struct fault_data *f, void *);
void (*write_page)(struct fault_data *f, void *);
int (*read_page)(struct vm_file *f, unsigned long f_offset, void *pagebuf);
int (*write_page)(struct vm_file *f, unsigned long f_offset, void *pagebuf);
};
/* Describes the pager task that handles a vm_area. */
@@ -68,27 +68,22 @@ struct vm_pager {
struct vm_pager_ops ops; /* The ops the pager does on area */
};
/*
* TODO: Since there's no vfs yet, an inode's i_addr field is the
* virtual memory address of a file which uniquely identifies that file.
*/
struct inode {
unsigned long i_addr; /* The unique, global resource id. */
};
/*
* Describes the in-memory representation of a file. This could
* point at a file or another resource, e.g. a device area or swapper space.
*/
struct vm_file {
struct inode inode;
int refcnt;
unsigned long vnum; /* Vnode number */
unsigned long length;
struct list_head list; /* List of all vm files in memory */
/* This is the cache of physical pages that this file has in memory. */
struct list_head page_cache_list;
struct vm_pager *pager;
};
/*
* Describes a virtually contiguous chunk of memory region in a task. It covers
* a unique virtual address area within its task, meaning that it does not
@@ -119,6 +114,7 @@ static inline struct vm_area *find_vma(unsigned long addr,
/* Pagers */
extern struct vm_pager default_file_pager;
extern struct vm_pager boot_file_pager;
extern struct vm_pager swap_pager;