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Cleaner allocation, mapping and prefaulting of utcb shm segments.

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A function has been defined that handles all utcb operations.
This commit is contained in:
Bahadir Balban
2008-10-24 17:20:42 +03:00
parent 46fcdc9b31
commit d43a98b4af
4 changed files with 52 additions and 63 deletions
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9
tasks/mm0/include/utcb.h
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@@ -3,14 +3,21 @@
#include <l4lib/types.h>
#include <task.h>
#define UTCB_PREFAULT (1 << 0) /* Prefaults utcb pages after mapping */
#define UTCB_NEW_SHM (1 << 1) /* Creates a new shm segment for utcb */
#define UTCB_NEW_ADDRESS (1 << 2) /* Allocates a virtual address for utcb */
int utcb_pool_init(void);
void *utcb_new_address(void);
int utcb_delete_address(void *utcb_addr);
/* IPC to send utcb address information to tasks */
void *task_send_utcb_address(struct tcb *sender, l4id_t taskid);
int utcb_map_to_task(struct tcb *owner, struct tcb *mapper, unsigned int flags);
int utcb_unmap_from_task(struct tcb *owner, struct tcb *mapper);
/* Prefault an *mmaped* utcb */
int utcb_prefault(struct tcb *task, unsigned int vmflags);