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Removed bits from kernel where pager utcb is set.

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Pagers now set their own utcb explicitly via exchange_registers.
exregs accepts calls from active pagers for this purpose only.
This commit is contained in:
Bahadir Balban
2009-10-18 15:01:38 +03:00
parent 7ba7a2e796
commit 2bd3266498
11 changed files with 79 additions and 58 deletions
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22
conts/posix/mm0/mm/init.c
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@@ -6,7 +6,7 @@
#include <l4lib/arch/syscalls.h>
#include <l4lib/arch/syslib.h>
#include <l4lib/utcb.h>
#include <l4lib/exregs.h>
#include <l4/lib/list.h>
#include <l4/generic/cap-types.h> /* TODO: Move this to API */
#include <l4/api/capability.h>
@@ -70,7 +70,9 @@ int pager_setup_task(void)
{
struct tcb *task;
struct task_ids ids;
struct exregs_data exregs;
void *mapped;
int err;
/*
* The thread itself is already known by the kernel,
@@ -131,19 +133,21 @@ int pager_setup_task(void)
BUG();
}
task_setup_utcb(task);
/* Set pager as child and parent of itself */
list_insert(&task->child_ref, &task->children);
task->parent = task;
/*
* The first UTCB address is already assigned by the
* microkernel for this pager. Ensure that we also get
* the same from our internal utcb bookkeeping.
*/
BUG_ON(task->utcb_address !=
__pfn_to_addr(cont_mem_regions.utcb->start));
/* Allocate and set own utcb */
task_setup_utcb(task);
memset(&exregs, 0, sizeof(exregs));
exregs_set_utcb(&exregs, task->utcb_address);
if ((err = l4_exchange_registers(&exregs, task->tid)) < 0) {
printf("FATAL: Pager could not set own utcb. "
"UTCB address: 0x%lx, error: %d\n",
task->utcb_address, err);
BUG();
}
/* Pager must prefault its utcb */
prefault_page(task, task->utcb_address,