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Finished adding untested bare functionality vfs

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Finished adding untested shm syscalls.
Finished adding untested l4 send/recv helpers

Everything compiles. Now going to fix lots of bugs ;-)
This commit is contained in:
Bahadir Balban
2008-02-03 17:42:38 +00:00
parent 05e9028e90
commit cab2e8bdd3
51 changed files with 1661 additions and 227 deletions
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107
tasks/fs0/src/task.c Normal file
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/*
* FS0 task data initialisation.
*
* Copyright (C) 2008 Bahadir Balban
*/
#include <l4/macros.h>
#include <l4/lib/list.h>
#include <l4/api/errno.h>
#include <l4lib/arch/syscalls.h>
#include <l4lib/arch/syslib.h>
#include <l4lib/ipcdefs.h>
#include <lib/malloc.h>
#include <task.h>
struct tcb_head {
struct list_head list;
int total; /* Total threads */
} tcb_head;
struct tcb *find_task(int tid)
{
struct tcb *t;
list_for_each_entry(t, &tcb_head.list, list)
if (t->tid == tid)
return t;
return 0;
}
/*
* Asks pager to send information about currently running tasks. Since this is
* called during initialisation, there can't be that many, so we assume message
* registers are sufficient. First argument tells how many there are, the rest
* tells the tids.
*/
int receive_pager_taskdata(l4id_t *tdata)
{
int err;
/* Make the actual ipc call */
if ((err = l4_sendrecv(PAGER_TID, PAGER_TID,
L4_IPC_TAG_TASKDATA)) < 0) {
printf("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);
return err;
}
/* Check if call itself was successful */
if ((err = l4_get_retval()) < 0) {
printf("%s: Error: %d.\n", __FUNCTION__, err);
return err;
}
/* Read total number of tasks. Note already used one mr. */
if ((tdata[0] = (l4id_t)read_mr(L4SYS_ARG0)) >= MR_UNUSED_TOTAL) {
printf("%s: Error: Too many tasks to read. Won't fit in mrs.\n",
__FUNCTION__);
BUG();
}
/* Now read task ids. */
for (int i = 0; i < (int)tdata[0]; i++)
tdata[1 + i] = (l4id_t)read_mr(L4SYS_ARG1 + i);
return 0;
}
/* Allocate a task struct and initialise it */
struct tcb *create_tcb(l4id_t tid)
{
struct tcb *t;
if (!(t = kmalloc(sizeof(*t))))
return PTR_ERR(-ENOMEM);
t->tid = tid;
INIT_LIST_HEAD(&t->list);
list_add_tail(&t->list, &tcb_head.list);
tcb_head.total++;
return t;
}
int init_task_structs(l4id_t *tdata)
{
struct tcb *t;
int total = tdata[0];
for (int i = 0; i < total; i++)
if (IS_ERR(t = create_tcb(tdata[1 + i])))
return (int)t;
return 0;
}
void init_task_data(void)
{
l4id_t tdata[MR_UNUSED_TOTAL];
INIT_LIST_HEAD(&tcb_head.list);
/* Read how many tasks and tids of each */
BUG_ON(receive_pager_taskdata(tdata) < 0);
/* Initialise local task structs using this info */
init_task_structs(tdata);
}