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shmat/shmget for utcbs are working for now.

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faults on shared memory needs to be implemented.
This commit is contained in:
Bahadir Balban
2008-03-19 22:26:38 +00:00
parent 55d24dbbdf
commit 466138f125
10 changed files with 130 additions and 84 deletions
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43
tasks/libl4/src/init.c
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@@ -10,6 +10,8 @@
#include <l4/macros.h>
#include INC_GLUE(memlayout.h)
#include <stdio.h>
#include <sys/types.h>
#include <sys/shm.h>
__l4_ipc_t __l4_ipc = 0;
__l4_map_t __l4_map = 0;
@@ -71,6 +73,40 @@ static void *l4_utcb_page(void)
return addr;
}
/*
* Initialises a non-pager task's shared memory utcb page
* using posix semantics.
*/
int utcb_init(void)
{
int shmid;
void *shmaddr;
/*
* Initialise utcb only if we're not the pager.
* The pager does it differently for itself.
*/
if (self_tid() != PAGER_TID) {
/* Obtain our utcb page address */
utcb_page = l4_utcb_page();
printf("%s: UTCB Read from mm0 as: 0x%x\n", __FUNCTION__,
(unsigned long)utcb_page);
/* Use it as a key to create a shared memory region */
BUG_ON((shmid = shmget((key_t)utcb_page,
PAGE_SIZE, IPC_CREAT)) < 0);
printf("Shmget success. shmid: %d\n", shmid);
/* Attach to the region */
BUG_ON((shmaddr = shmat(shmid, utcb_page, 0)) < 0);
BUG_ON(shmaddr != utcb_page);
printf("Shmat success. Attached %d @ 0x%x\n", shmid, (unsigned long)shmaddr);
}
return 0;
}
void __l4_init(void)
{
kip = l4_kernel_interface(0, 0, 0);
@@ -89,11 +125,6 @@ void __l4_init(void)
__l4_kmem_grant = (__l4_kmem_grant_t)kip->kmem_grant;
__l4_kmem_reclaim = (__l4_kmem_reclaim_t)kip->kmem_reclaim;
/* Initialise utcb only if we're not the pager */
if (self_tid() != PAGER_TID) {
utcb_page = l4_utcb_page();
printf("%s: UTCB Read from mm0 as: 0x%x\n", __FUNCTION__,
(unsigned long)utcb_page);
}
utcb_init();
}