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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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15
tasks/mm0/main.c
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@@ -18,6 +18,7 @@
#include <task.h>
#include <vm_area.h>
#include <syscalls.h>
#include <file.h>
/* FIXME:LOCKING:FIXME:LOCKING:FIXME:LOCKING
* NOTE: For multithreadded MM0, not suprisingly, we need locking on
@@ -83,6 +84,20 @@ void handle_requests(void)
sys_shmdt(sender, (void *)mr[0]);
break;
case L4_IPC_TAG_PAGER_SYSOPEN:
/* vfs opens a file and tells us about it here. */
vfs_receive_sys_open(sender, (l4id_t)mr[0], (int)mr[1],
(unsigned long)mr[2], (unsigned long)mr[3]);
break;
case L4_IPC_TAG_READ:
sys_read(sender, (int)mr[0], (void *)mr[1], (int)mr[2]);
break;
case L4_IPC_TAG_WRITE:
sys_write(sender, (int)mr[0], (void *)mr[1], (int)mr[2]);
break;
case L4_IPC_TAG_MMAP: {
struct sys_mmap_args *args = (struct sys_mmap_args *)&mr[0];
BUG(); /* FIXME: There are 8 arguments to ipc whereas there are 7 mrs available. Fix this by increasing MRs to 8 ??? */