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Current File : //usr/src/linux-headers-5.4.0-1103-aws/arch/powerpc/include/asm/hugetlb.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_HUGETLB_H
#define _ASM_POWERPC_HUGETLB_H

#ifdef CONFIG_HUGETLB_PAGE
#include <asm/page.h>

#ifdef CONFIG_PPC_BOOK3S_64
#include <asm/book3s/64/hugetlb.h>
#elif defined(CONFIG_PPC_FSL_BOOK3E)
#include <asm/nohash/hugetlb-book3e.h>
#elif defined(CONFIG_PPC_8xx)
#include <asm/nohash/32/hugetlb-8xx.h>
#endif /* CONFIG_PPC_BOOK3S_64 */

extern bool hugetlb_disabled;

void hugetlbpage_init_default(void);

void flush_dcache_icache_hugepage(struct page *page);

int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
			   unsigned long len);

static inline int is_hugepage_only_range(struct mm_struct *mm,
					 unsigned long addr,
					 unsigned long len)
{
	if (IS_ENABLED(CONFIG_PPC_MM_SLICES) && !radix_enabled())
		return slice_is_hugepage_only_range(mm, addr, len);
	return 0;
}

#define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
			    unsigned long end, unsigned long floor,
			    unsigned long ceiling);

#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
					    unsigned long addr, pte_t *ptep)
{
#ifdef CONFIG_PPC64
	return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
#else
	return __pte(pte_update(ptep, ~0UL, 0));
#endif
}

#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
					 unsigned long addr, pte_t *ptep)
{
	huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
	flush_hugetlb_page(vma, addr);
}

#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
int huge_ptep_set_access_flags(struct vm_area_struct *vma,
			       unsigned long addr, pte_t *ptep,
			       pte_t pte, int dirty);

static inline void arch_clear_hugepage_flags(struct page *page)
{
}

#include <asm-generic/hugetlb.h>

#else /* ! CONFIG_HUGETLB_PAGE */
static inline void flush_hugetlb_page(struct vm_area_struct *vma,
				      unsigned long vmaddr)
{
}

#define hugepd_shift(x) 0
static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
				    unsigned pdshift)
{
	return NULL;
}
#endif /* CONFIG_HUGETLB_PAGE */

#endif /* _ASM_POWERPC_HUGETLB_H */

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