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Added first part of extended ipc support.

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- Extended ipc tests
- Need to copy from ktcb-to-ktcb instead of ktcb-to-user
- Need to check flags of both ipc parties before ipc copy type.
This commit is contained in:
Bahadir Balban
2009-05-27 14:07:17 +03:00
parent 19c71cc658
commit 3ff519439b
8 changed files with 222 additions and 41 deletions
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29
include/l4/generic/tcb.h
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@@ -1,7 +1,7 @@
/*
* Thread Control Block, kernel portion.
*
* Copyright (C) 2007 Bahadir Balban
* Copyright (C) 2007-2009 Bahadir Bilgehan Balban
*/
#ifndef __TCB_H__
#define __TCB_H__
@@ -17,6 +17,10 @@
#include INC_GLUE(context.h)
#include INC_SUBARCH(mm.h)
/*
* Bit mappings for the ktcb flags field
*/
/*
* These are a mixture of flags that indicate the task is
* in a transitional state that could include one or more
@@ -29,6 +33,10 @@
/* IPC resulted in a fault error (For ipcs that cannot page fault) */
#define IPC_EFAULT (1 << 3)
/* IPC type is encoded in task flags in bits [7:4] */
#define TASK_FLAGS_IPC_TYPE_MASK 0xF0
#define TASK_FLAGS_IPC_TYPE_SHIFT 4
/* Task states */
enum task_state {
TASK_INACTIVE = 0,
@@ -106,7 +114,8 @@ struct ktcb {
struct waitqueue *wq;
/* Extended ipc buffer, points to the space after ktcb */
char extended_ipc_buffer[];
char *extended_ipc_buffer;
unsigned long extended_ipc_size;
};
/* Per thread kernel stack unified on a single page. */
@@ -129,6 +138,21 @@ static inline void set_task_ids(struct ktcb *task, struct task_ids *ids)
task->tgid = ids->tgid;
}
static inline void tcb_set_ipc_flags(struct ktcb *task,
unsigned int flags)
{
task->flags |= ((flags & L4_IPC_FLAGS_TYPE_MASK)
<< TASK_FLAGS_IPC_TYPE_SHIFT) &
TASK_FLAGS_IPC_TYPE_MASK;
}
static inline unsigned int tcb_get_ipc_flags(struct ktcb *task)
{
return ((task->flags & TASK_FLAGS_IPC_TYPE_MASK)
>> TASK_FLAGS_IPC_TYPE_SHIFT)
& L4_IPC_FLAGS_TYPE_MASK;
}
#define THREAD_IDS_MAX 1024
#define SPACE_IDS_MAX 1024
#define TGROUP_IDS_MAX 1024
@@ -138,7 +162,6 @@ extern struct id_pool *thread_id_pool;
extern struct id_pool *space_id_pool;
struct ktcb *tcb_find(l4id_t tid);
struct ktcb *tcb_find_by_space(l4id_t tid);
void tcb_add(struct ktcb *tcb);
void tcb_remove(struct ktcb *tcb);