-#ifdef CONFIG_X86_32
- pgd_t *xen_pgd = (pgd_t *)xen_start_info->pt_base;
- int i;
-
- init_mm.pgd = base;
- /*
- * copy top-level of Xen-supplied pagetable into place. This
- * is a stand-in while we copy the pmd pages.
- */
- memcpy(base, xen_pgd, PTRS_PER_PGD * sizeof(pgd_t));
-
- /*
- * For PAE, need to allocate new pmds, rather than
- * share Xen's, since Xen doesn't like pmd's being
- * shared between address spaces.
- */
- for (i = 0; i < PTRS_PER_PGD; i++) {
- if (pgd_val_ma(xen_pgd[i]) & _PAGE_PRESENT) {
- pmd_t *pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
-
- memcpy(pmd, (void *)pgd_page_vaddr(xen_pgd[i]),
- PAGE_SIZE);
-
- make_lowmem_page_readonly(pmd);
-
- set_pgd(&base[i], __pgd(1 + __pa(pmd)));
- } else
- pgd_clear(&base[i]);
- }
-
- /* make sure zero_page is mapped RO so we can use it in pagetables */
- make_lowmem_page_readonly(empty_zero_page);
- make_lowmem_page_readonly(base);
- /*
- * Switch to new pagetable. This is done before
- * pagetable_init has done anything so that the new pages
- * added to the table can be prepared properly for Xen.
- */
- xen_write_cr3(__pa(base));
-
- /* Unpin initial Xen pagetable */
- pin_pagetable_pfn(MMUEXT_UNPIN_TABLE,
- PFN_DOWN(__pa(xen_start_info->pt_base)));
-#endif /* CONFIG_X86_32 */