int map_page(unsigned long va, phys_addr_t pa, int flags)
{
pmd_t *pd;
pte_t *pg;
int err = -ENOMEM;
/* Use upper 10 bits of VA to index the first level map */
pd = pmd_offset(pgd_offset_k(va), va);
/* Use middle 10 bits of VA to index the second-level map */
pg = pte_alloc_kernel(pd, va);
if (pg != 0) {
err = 0;
set_pte_at(&init_mm, va, pg, pfn_pte(pa >> PAGE_SHIFT, __pgprot(flags)));
if (mem_init_done)
flush_HPTE(0, va, pmd_val(*pd));
}
int
map_page(unsigned long va, unsigned long pa, int flags)
{
pmd_t *pd;
pte_t *pg;
int err = -ENOMEM;
spin_lock(&init_mm.page_table_lock);
/* Use upper 10 bits of VA to index the first level map */
pd = pmd_offset(pgd_offset_k(va), va);
/* Use middle 10 bits of VA to index the second-level map */
pg = pte_alloc(&init_mm, pd, va);
if (pg != 0) {
err = 0;
set_pte(pg, mk_pte_phys(pa & PAGE_MASK, __pgprot(flags)));
if (mem_init_done)
flush_HPTE(0, va, pg);
}
spin_unlock(&init_mm.page_table_lock);
return err;
}
