Exemple #1
0
static int set_up_temporary_mappings(void)
{
	struct x86_mapping_info info = {
		.alloc_pgt_page	= alloc_pgt_page,
		.pmd_flag	= __PAGE_KERNEL_LARGE_EXEC,
		.offset		= __PAGE_OFFSET,
	};
	unsigned long mstart, mend;
	pgd_t *pgd;
	int result;
	int i;

	pgd = (pgd_t *)get_safe_page(GFP_ATOMIC);
	if (!pgd)
		return -ENOMEM;

	/* Prepare a temporary mapping for the kernel text */
	result = set_up_temporary_text_mapping(pgd);
	if (result)
		return result;

	/* Set up the direct mapping from scratch */
	for (i = 0; i < nr_pfn_mapped; i++) {
		mstart = pfn_mapped[i].start << PAGE_SHIFT;
		mend   = pfn_mapped[i].end << PAGE_SHIFT;

		result = kernel_ident_mapping_init(&info, pgd, mstart, mend);
		if (result)
			return result;
	}

	temp_level4_pgt = __pa(pgd);
	return 0;
}
Exemple #2
0
asmlinkage int swsusp_arch_resume(void)
{
	int error;

	resume_pg_dir = (pgd_t *)get_safe_page(GFP_ATOMIC);
	if (!resume_pg_dir)
		return -ENOMEM;

	resume_init_first_level_page_table(resume_pg_dir);

	error = set_up_temporary_text_mapping(resume_pg_dir);
	if (error)
		return error;

	error = resume_physical_mapping_init(resume_pg_dir);
	if (error)
		return error;

	temp_pgt = __pa(resume_pg_dir);

	error = relocate_restore_code();
	if (error)
		return error;

	/* We have got enough memory and from now on we cannot recover */
	restore_image();
	return 0;
}