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Adding address space structure to ktcbs. Still booting until virtual memory is enabled.

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This commit is contained in:
Bahadir Balban
2009-05-07 10:26:34 +03:00
parent 3acc66c2e7
commit 6e1edc0aad
10 changed files with 45 additions and 44 deletions
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4
src/api/space.c
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@@ -36,7 +36,7 @@ int sys_map(syscall_context_t *regs)
return -EINVAL;
found:
add_mapping_pgd(phys, virt, npages << PAGE_BITS, flags, target->pgd);
add_mapping_pgd(phys, virt, npages << PAGE_BITS, flags, TASK_PGD(target));
return 0;
}
@@ -60,7 +60,7 @@ int sys_unmap(syscall_context_t *regs)
return -ESRCH;
for (int i = 0; i < npages; i++) {
ret = remove_mapping_pgd(virtual + i * PAGE_SIZE, target->pgd);
ret = remove_mapping_pgd(virtual + i * PAGE_SIZE, TASK_PGD(target));
if (ret)
retval = ret;
}

20
src/api/thread.c
View File

@@ -55,7 +55,7 @@ int arch_clear_thread(struct ktcb *task)
task->context.spsr = ARM_MODE_USR;
/* Clear the page tables */
remove_mapping_pgd_all_user(task->pgd);
remove_mapping_pgd_all_user(TASK_PGD(task));
return 0;
}
@@ -256,12 +256,6 @@ int thread_setup_new_ids(struct task_ids *ids, unsigned int flags,
return 0;
}
#define KTCB_CREATE_PAGE_TABLES (1 << 0)
/* Allocates a ktcb and page tables depending on flags */
struct ktcb *ktcb_create(unsigned int flags)
{
}
/*
* Creates a thread, with a new thread id, and depending on the flags,
* either creates a new space, uses the same space as another thread,
@@ -282,23 +276,23 @@ int thread_create(struct task_ids *ids, unsigned int flags)
/* Determine space allocation */
if (create_flags == THREAD_NEW_SPACE) {
/* Allocate new pgd and copy all kernel areas */
if (!(new->pgd = alloc_pgd())) {
if (!(TASK_PGD(new) = alloc_pgd())) {
free_page(new);
return -ENOMEM;
}
copy_pgd_kern_all(new->pgd);
copy_pgd_kern_all(TASK_PGD(new));
} else {
/* Existing space will be used, find it from all tasks */
list_for_each_entry(task, &global_task_list, task_list) {
/* Space ids match, can use existing space */
if (task->spid == ids->spid) {
if (flags == THREAD_SAME_SPACE) {
new->pgd = task->pgd;
TASK_PGD(new) = TASK_PGD(task);
} else {
new->pgd = copy_page_tables(task->pgd);
if (IS_ERR(new->pgd)) {
err = (int)new->pgd;
TASK_PGD(new) = copy_page_tables(TASK_PGD(task));
if (IS_ERR(TASK_PGD(new))) {
err = (int)TASK_PGD(new);
free_page(new);
return err;
}