[linux-2.6-block.git] / arch / powerpc / include / asm / book3s / 64 / pgtable-64k.h

/* SPDX-License-Identifier: GPL-2.0 */
#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_raw(pmd) & cpu_to_be64(_PAGE_PTE));
}

static inline int pud_huge(pud_t pud)
{
	/*
	 * leaf pte for huge page
	 */
	return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
}

static inline int pgd_huge(pgd_t pgd)
{
	/*
	 * leaf pte for huge page
	 */
	return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE));
}
#define pgd_huge pgd_huge

/*
 * 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

/*
 * This should never get called
 */
static inline int get_hugepd_cache_index(int index)
{
	BUG();
}

#else /* !CONFIG_HUGETLB_PAGE */
static inline int pmd_huge(pmd_t pmd) { return 0; }
static inline int pud_huge(pud_t pud) { return 0; }
#endif /* CONFIG_HUGETLB_PAGE */

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 */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
a9252aae AK	2	#ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
	3	#define _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
	4
	5	#ifndef __ASSEMBLY__
	6	#ifdef CONFIG_HUGETLB_PAGE
	7	/*
	8	* We have PGD_INDEX_SIZ = 12 and PTE_INDEX_SIZE = 8, so that we can have
	9	* 16GB hugepage pte in PGD and 16MB hugepage pte at PMD;
	10	*
	11	* Defined in such a way that we can optimize away code block at build time
	12	* if CONFIG_HUGETLB_PAGE=n.
	13	*/
	14	static inline int pmd_huge(pmd_t pmd)
	15	{
	16	/*
	17	* leaf pte for huge page
	18	*/
66c570f5	19	return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
a9252aae AK	20	}
	21
	22	static inline int pud_huge(pud_t pud)
	23	{
	24	/*
	25	* leaf pte for huge page
	26	*/
66c570f5	27	return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
a9252aae AK	28	}
	29
	30	static inline int pgd_huge(pgd_t pgd)
	31	{
	32	/*
	33	* leaf pte for huge page
	34	*/
66c570f5	35	return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE));
a9252aae AK	36	}
	37	#define pgd_huge pgd_huge
	38
a9252aae AK	39	/*
	40	* With 64k page size, we have hugepage ptes in the pgd and pmd entries. We don't
	41	* need to setup hugepage directory for them. Our pte and page directory format
	42	* enable us to have this enabled.
	43	*/
	44	static inline int hugepd_ok(hugepd_t hpd)
	45	{
	46	return 0;
	47	}
fadd03c6	48
a9252aae	49	#define is_hugepd(pdep) 0
a9252aae	50
fadd03c6 AK	51	/*
	52	* This should never get called
	53	*/
	54	static inline int get_hugepd_cache_index(int index)
	55	{
	56	BUG();
	57	}
	58
aad71e39 ME	59	#else /* !CONFIG_HUGETLB_PAGE */
	60	static inline int pmd_huge(pmd_t pmd) { return 0; }
	61	static inline int pud_huge(pud_t pud) { return 0; }
a9252aae AK	62	#endif /* CONFIG_HUGETLB_PAGE */
a9252aae AK	63
6cc1a0ee AK	64	static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr,
	65	unsigned long pfn, pgprot_t prot)
	66	{
	67	if (radix_enabled())
	68	BUG();
	69	return hash__remap_4k_pfn(vma, addr, pfn, prot);
6cc1a0ee	70	}
a9252aae AK	71	#endif /* __ASSEMBLY__ */
a9252aae AK	72	#endif /_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H /