arch/powerpc/include/asm/book3s/64/pgtable-64k.h

#ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
#define _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H

#ifndef __ASSEMBLY__
#ifdef CONFIG_HUGETLB_PAGE
/*
 * We have PGD_INDEX_SIZ = 12 and PTE_INDEX_SIZE = 8, so that we can have
 * 16GB hugepage pte in PGD and 16MB hugepage pte at PMD;
 *
 * Defined in such a way that we can optimize away code block at build time
 * if CONFIG_HUGETLB_PAGE=n.
 */
static inline int pmd_huge(pmd_t pmd)
{
	/*
	 * leaf pte for huge page
	 */
	return !!(pmd_val(pmd) & _PAGE_PTE);
}

static inline int pud_huge(pud_t pud)
{
	/*
	 * leaf pte for huge page
	 */
	return !!(pud_val(pud) & _PAGE_PTE);
}

static inline int pgd_huge(pgd_t pgd)
{
	/*
	 * leaf pte for huge page
	 */
	return !!(pgd_val(pgd) & _PAGE_PTE);
}
#define pgd_huge pgd_huge

#ifdef CONFIG_DEBUG_VM
extern int hugepd_ok(hugepd_t hpd);
#define is_hugepd(hpd)               (hugepd_ok(hpd))
#else
/*
 * With 64k page size, we have hugepage ptes in the pgd and pmd entries. We don't
 * need to setup hugepage directory for them. Our pte and page directory format
 * enable us to have this enabled.
 */
static inline int hugepd_ok(hugepd_t hpd)
{
	return 0;
}
#define is_hugepd(pdep)			0
#endif /* CONFIG_DEBUG_VM */

#endif /* CONFIG_HUGETLB_PAGE */

#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static inline int pmd_trans_huge(pmd_t pmd)
{
	if (radix_enabled())
		return radix__pmd_trans_huge(pmd);
	return hash__pmd_trans_huge(pmd);
}

#define __HAVE_ARCH_PMD_SAME
static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
{
	if (radix_enabled())
		return radix__pmd_same(pmd_a, pmd_b);
	return hash__pmd_same(pmd_a, pmd_b);
}

static inline pmd_t pmd_mkhuge(pmd_t pmd)
{
	if (radix_enabled())
		return radix__pmd_mkhuge(pmd);
	return hash__pmd_mkhuge(pmd);
}

#endif /*  CONFIG_TRANSPARENT_HUGEPAGE */

static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr,
			       unsigned long pfn, pgprot_t prot)
{
	if (radix_enabled())
		BUG();
	return hash__remap_4k_pfn(vma, addr, pfn, prot);
}
#endif	/* __ASSEMBLY__ */
#endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */