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Adding support for refcounted page tables. Fixed freeing of kernel pmds on copy_page_tables

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This commit is contained in:
Bahadir Balban
2009-05-02 11:21:19 +03:00
parent 8ab892375e
commit 3acc66c2e7
3 changed files with 17 additions and 3 deletions
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6
src/api/thread.c
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@@ -256,6 +256,12 @@ 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,

6
src/arch/arm/v5/mm.c
View File

@@ -460,9 +460,11 @@ pgd_table_t *copy_page_tables(pgd_table_t *from)
return pgd;
out_error:
/* Find all allocated pmds and free them */
/* Find all allocated non-kernel pmds and free them */
for (int i = 0; i < PGD_ENTRY_TOTAL; i++) {
if ((pgd->entry[i] & PGD_TYPE_MASK) == PGD_TYPE_COARSE) {
/* Non-kernel pmd that has just been allocated. */
if (!is_kern_pgdi(i) &&
(pgd->entry[i] & PGD_TYPE_MASK) == PGD_TYPE_COARSE) {
/* Obtain the pmd handle */
pmd = (pmd_table_t *)
phys_to_virt((pgd->entry[i] &